CN103530997B - Fire alarm control system and control method thereof - Google Patents

Fire alarm control system and control method thereof Download PDF

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Publication number
CN103530997B
CN103530997B CN201310531438.8A CN201310531438A CN103530997B CN 103530997 B CN103530997 B CN 103530997B CN 201310531438 A CN201310531438 A CN 201310531438A CN 103530997 B CN103530997 B CN 103530997B
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circuit
resistance
unit
triode
fire alarm
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CN103530997A (en
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陶章亮
谢海彬
吴金海
聂河东
林素欧
胡中祥
周铭
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Zhejiang aide intelligent Polytron Technologies Inc
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ZHEJIANG EIT ELECTRON CO Ltd
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Abstract

The present invention relates to a kind of fire alarm control system and control method thereof, comprise main computer unit, battery unit,? straight control unit;? also comprise the circuit units that adopts two bus modes, described circuit units comprises on-off circuit, pulse modulated circuit, returns code current circuit, analog-digital converter, field apparatus; The invention solves multiple-way system transmission line of the prior art and have the problem that quantity is large, total fault rate is high, time of fire alarming is grown, adopt independent research power supply with communicate by letter, control and report to the police in nonpolarity two bus modes of digitlization of one, do not improving under the prerequisite of baud rate, judge a warning address as long as 8ms, even if provide a kind of has 255 sensing points to upload fire alarm information also can to realize within 2 second time and quoting, greatly improve fire alarm control system and the control method thereof of the response time of fire alarm in same polling period simultaneously.

Description

Fire alarm control system and control method thereof
Technical field
The present invention relates to a kind of alarm control system, specifically a kind of fire alarm control system and control method thereof, belongs to fire prevention field.
Background technology
Fire is one of common disaster, and its loss causing is huge, if can find in time and process as early as possible, loss can be reduced greatly. Therefore for region division fire detecting arrangement and the warning device of potential fire risk, at fire early period of origination or may form fire time, by fire detecting arrangement detect can suspect signal after, carry out alarm by warning device, so that related personnel can process in time, will lose as far as possible and reduce.
When being provided with at the scene after numerous detections and warning device, for the ease of management and control, all fire alarm installations are connected in control system by the mode of data communication, form fire alarm control system. In fire alarm control system, the signal that can return according to each on-the-spot fire detecting arrangement is monitored scene, in the time there is suspicious situation, control system is reported to the police by warning device, fire alarm control system can effectively judge on-the-spot Fires Occurred, processes in time the condition of a disaster by the mode of real-time monitoring.
Fire alarm control unit is the heart of automatic fire alarm system, can power to detector, has following function: 1) be used for receiving fire signal and start fire alarm installation. This equipment also can be used to indicate fire position and record for information about. 2) can start fire alarm signal or start self-extinguishing equipment and fire protection linkage control equipment by automatic fire control fire control unit by fire alarm dispensing device. 3) the automatically true(-)running of surveillance and to specific fault spoken, light reports to the police.
Modern fire alarm control unit is in order to reduce wrong report, facilitate installation and debugging, reduce I&M expense, reduce connecting line number, the accurate location (position numbering) of knowing timely and accurately the fire detector that sends warning, all generally adopts pulse-code-odulation system, the bus structures of the few line system of composition, as master control core cell, be equipped with memory and digital interface device etc. by microcomputer or one-chip computer. Therefore modern alarm controller has stronger resisting in the ability of disturbing and flexible adaptability to changes.
Fire alarm control unit constantly sends coded pulse signal to the code detector at each detection position. When this signal and the detector of a part are encoded when identical, explorer response, return information, judges that whether this position is normal. If normal, the detector that main frame (cpu) continues to patrol and examine other position; If undesired, judgement is fault-signal or fire alarm, sends corresponding sound, visual alarm, and sends alarm signal to concentrated alarm controller.
As China Patent No. to be CN1125421C disclose in " a kind of two-bus communication and use the fire alarm system of the method " a kind of to fire fast response two-bus communication and adopt the fire alarm system of the method. The process that realizes response is fast by the addressed location grouping in each detection bus loop, produce after fire alarm when thering is the addressed location of fire alarm interrupt priority, on the correspondence position of signaling position, return group number pulse by two buses to alarm controller, on time code bit correspondence position, in passback group, number pulse, alarm controller calculates address number and the alarm of the addressed location of generation fire signal according to numbering in group number and group.
But in this invention, judge that a warning address just at least needs 50ms, in the time there is many alarm points of N, controller just needs N × 50ms to process judgement warning address, needs the time longer, is unfavorable within the shortest time and alarm.
Summary of the invention
The present invention will solve multiple-way system transmission line of the prior art and exist quantity large, add up to fault rate high, the problem that time of fire alarming is grown, the power supply that the present invention adopts independent research with communicate by letter, control and report to the police in nonpolarity two bus modes of digitlization of one, do not improving under the prerequisite of baud rate, judge a warning address as long as 8ms, even if provide a kind of has 255 sensing points to upload fire alarm information also can to realize within 2 second time and quoting in same polling period simultaneously, fire alarm control system and the control method thereof of the response time of fire alarm are greatly improved
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of fire alarm control system, comprising:
Main computer unit, described main computer unit sends address pulse signal and command pulse signal, and receives the data signal of feedback, and signal is processed and each unit is controlled;
Battery unit, is connected with main computer unit, gives system power supply;
Straight control unit, is connected respectively with main computer unit and field apparatus, directly controls field apparatus according to the instruction of described main computer unit;
Also comprise the circuit units that adopts two bus modes, described circuit units comprises on-off circuit, pulse modulated circuit, returns code current circuit, analog-digital converter, field apparatus;
On-off circuit, is connected with the output of pulse signal pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends address pulse signal, and working power is provided;
Pulse modulated circuit, is connected with the command pulse signal output pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends command pulse signal;
Return code current circuit; comprise high-side current mapping circuit, low side sample circuit and amplifying circuit; described high-side current mapping circuit is connected respectively with two bus high level lines and low level line; described low side sample circuit is connected with the low level line of described two buses, and described high-side current mapping circuit is connected with amplifying circuit after adopting circuit to be connected with described low side;
Analog-digital converter, is connected respectively with described time code current circuit and main computer unit, and the signal of described time decoding circuit is carried out inputting main computer unit after analog-to-digital conversion;
Field apparatus, is connected with high level line and the low level line of two buses, receives the signal in two buses.
Described circuit units also comprises pulse shaper, is connected with described on-off circuit and pulse modulated circuit, will after described command pulse signal and address pulse signal shaping, export to field apparatus; Also comprise short-circuit detecting circuit, be connected respectively with described two bus high level lines and described analog-digital converter, detect the signal of telecommunication of described two buses and input described analog-digital converter; In described short-circuit detecting circuit, be provided with short circuit indicating device, in the time being short-circuited state, indicate.
Described circuit units, directly control unit, main computer unit connects by CAN bus.
Also comprise multicomputer net unit, described fire alarm control system can be realized multiple fire alarm control system networking work by multicomputer net unit.
Also comprise linkage unit, described linkage unit is also connected with CAN bus, and the start and stop key in described linkage unit can be associated with any one or one group of bus field apparatus by definition, completes the on off control to this bus field apparatus.
Also comprise communication processing unit, described communication processing unit is divided into internal communication unit and outer set net communication unit, described internal communication unit by two bus communication modes and described circuit units, directly control unit, linkage unit and main computer unit and carry out communication, described outer set net communication unit is by two bus communication modes and other fire alarm control system networking communications.
Described communication processing unit adopts CAN communication controller and CAN bus transceiver, and the two ends of described CAN bus transceiver are respectively equipped with two resistance, and the resistance input of described CAN bus transceiver is connected with slope resistance.
Described straight control unit adopts two-wire system communication, and is provided with manual output control model and automatic linkage output mode.
Also comprise human-computer dialogue unit, described human-computer dialogue unit comprises liquid crystal display, keyboard, buzzer, LED light, printer, touch-screen, loudspeaker.
Described on-off circuit comprises the first NAND gate circuit U2A, its first input end is connected with the address pulse signal output pin of the main computer unit in described circuit units, describedly be connected with its first input end with the second input of the first NAND gate circuit U2A, it is described on-off circuit input that the output of described the first NAND gate U2A is connected to resistance R 5 one end, the other end of described resistance R 5 is connected to the base stage of triode T2, the colelctor electrode of described triode T2 is connected to the base stage of power switch pipe T1 by resistance R 4, the colelctor electrode of described power switch pipe T1 is connected with two bus high level line L+, the emitter stage of described power switch pipe T1 is connected with its base stage by resistance R 3, the emitter stage of described power switch pipe T1 is also connected with external 24V power supply.
Described pulse modulated circuit comprises the second NAND gate U3A, its first input end is connected with the command pulse signal output pin of described main computer unit, the second input of described the second NAND gate U3A is connected with its first input end, the output of described the second NAND gate U3A is connected with one end of resistance R 10, the other end of described resistance R 10 is connected to the base stage of triode T5, the colelctor electrode of described triode T5 is connected to external 24V power supply by resistance R 11, described external 24V power supply is also connected to the input of three-terminal voltage-stabilizing pipe T11, the colelctor electrode of described triode T5 is also connected to the base stage of triode T6, the emitter stage of described triode T6, after one end parallel connection of one end of resistance R 12 and capacitor C 2, be connected with the emitter stage of triode T5, the colelctor electrode of described triode T6, after the other end parallel connection of the other end of resistance R 12 and capacitor C 2, be connected to the adjustment end of three-terminal voltage-stabilizing pipe T11, resistance R 13 is connected to the output of three terminal regulator T11 and adjusts between end, the output of described three terminal regulator T11 is also by the resistance R 15 of connecting successively, R16 is connected to the anode of diode D1, the negative electrode of described diode D1 is connected to the high level line L+ of two buses.
High-side current mapping circuit described in described time code current circuit is connected with two bus two ends, in described high-side current mapping circuit, the colelctor electrode of triode T7 is connected with the low level line L-of described two buses, the emitter stage of described triode T7 is connected between resistance R 15 and the output of three-terminal voltage-stabilizing pipe T11 by resistance R 14, the base stage of described triode T7 is connected with the output of operational amplifier U4A, the reverse input end of described operational amplifier U4A is connected with the emitter stage of triode T7, the positive input of described operational amplifier U4A is connected between resistance R 15 and R16, the plus earth of described operational amplifier, its negative pole connects external 24V power supply, the positive input that the low level line L-of described two buses is also operational amplifier U4B with the input of amplifying circuit is connected, described low side sample circuit is sampling resistor R19, after the anode of one end of described sampling resistor R19 and electric capacity D2 is in parallel, be connected to the positive input of described operational amplifier U4B, after the negative electrode of the other end of sampling resistor R19 and electric capacity D2 is in parallel, be connected to the input anyway of described operational amplifier U4B by resistance R 18, the point ground connection in parallel of described resistance R 18 and R19, resistance R 17 is connected to the output of operational amplifier U4B and anyway between input, the output of described operational amplifier U4B is the output of described amplifying circuit, it is connected to the IN0 input of analog-digital converter U1.
Described pulse shaper comprises resistance R 7, one end of described resistance R 7 is connected with the output of described the second NAND gate U3A, the output of described the first NAND gate circuit U2A is one end of contact resistance R6 also, after the other end parallel connection of described resistance R 7 and R6, be connected with the base stage of triode T4, the parallel connection point of the emitter stage of described triode T4 and the emitter stage of triode T3 is connected and ground connection with the emitter stage of triode T2, after the base stage of the colelctor electrode of described triode T4 and triode T3 is in parallel, be connected to two bus high level line L+ by resistance R 8, the colelctor electrode of described triode T3 is connected to two bus high level line L+ by resistance R 9.
The input of described short-circuit detecting circuit is that one end of resistance R 1 and the IN1 input of described analog-digital converter U1 are connected, the other end of described resistance R 1 is connected to short circuit indicating device, described short circuit indicating device is luminous tube L1, the negative electrode of described luminous tube L1 is connected with resistance R 1, the anodic bonding of described luminous tube L1 is to the high level line L+ of two buses, one end ground connection after resistance R 2 is in parallel with capacitor C 1, the other end is connected to the IN1 input of analog-digital converter U1.
Battery unit comprises switching power supply, standby power unit, power supply automatic switch unit and power supply status collecting unit; Described switching power supply is to system power supply, and charges to the reserve battery in standby power unit, and described power supply automatic switch unit automatically switches to described standby power unit in the time of described switching power supply power-off; Described power supply status collecting unit gathers the voltage in described battery unit, is obtained a result and is shown by described human-computer dialogue unit by judgement.
Described standby power unit comprises charging circuit of stand-by battery, the input of described charging circuit of stand-by battery i.e. three terminal voltage voltage-stablizer UV2 is connected with main power source VAA+, the colelctor electrode of triode TV3 is by the resistance R V17 output that be connected to described three terminal voltage voltage-stablizer UV2s in parallel with the emitter stage of triode TV2, the colelctor electrode of described triode TV3 is also connected with the adjustment end of described three terminal voltage voltage-stablizer UV2, the emitter stage of described triode TV3 is also connected with the adjustment end of described three end power regulator UV2 by resistance R V13, the colelctor electrode of described triode TV2 is connected by the base stage with triode TV3 of resistance R V9 parallel connection with the colelctor electrode of triode TVB1 by resistance R V15, between the colelctor electrode of described triode TVB1 and resistance R V9, be also connected with diode DVB1, resistance R V13 is connected between the base stage and emitter stage of triode TV2, the base stage of described triode TV2 also with the anodic bonding of diode DV2, the negative electrode of described diode DV2 is connected with stand-by power supply VBB+, the base stage of described triode TVB1 is connected with the negative electrode of diode ZVB1 by resistance R VB2, the anode of described diode ZVB1 is connected with stand-by power supply VBB+, described stand-by power supply VBB+ is connected with the first contact of relay R LY1 switch, the public contact of described relay R LY1 is connected with reserve battery by fuse FV2, the second contact of described relay R LY1 is connected with buzzer one end, the adjustment end of described three terminal voltage voltage-stablizer UV2 is connected with the other end of described buzzer with after the emitter stage of triode TV3 and the emitter stage parallel connection of triode TV1 by resistance R V18, the grounded emitter of described triode TV1, the colelctor electrode of described triode TV1 is connected with coil one end of relay R LY1, the other end of the coil of described relay R LY1 is connected with the emitter stage of described triode TVB1, the base stage of described triode TV1 is connected to the anode of diode ZV1 by resistance R V5, the negative electrode of described diode ZV1 is connected between the coil of relay R LY1 and the emitter stage of triode TVB1 and external 1V voltage.
Described straight control unit comprises switching on/off circuit, current detecting amplifying circuit and voltage detecting circuit, described switching on/off circuit is connected with described main computer unit output, the output of described switching on/off circuit is connected with field apparatus, described current detecting amplifying circuit is connected with described circuit units with voltage detecting circuit, and be connected respectively to analog-digital conversion circuit as described, described main computer unit sends enabling signal to described switching on/off circuit, control the start and stop of field apparatus, through described current detecting amplifying circuit, processing sends to analog-digital conversion circuit as described to the current signal of described circuit units, its voltage signal sends to analog-digital conversion circuit as described through described voltage detecting circuit processing.
The input of the switching on/off circuit of described straight control unit is that one end of coil and the signal output part of described main computer unit of relay 1JQ1 is connected, the other end ground connection of described relay 1JQ1 coil, diode 1DD7 is connected on relay 1JQ1 coil two ends, switch one end of described relay 1JQ1 is connected with external power supply CV+, described external power supply CV+ is also connected with one end of resistance 1DR1, the other end of described relay 1JQ1 switch connects the anode of diode 1DD2, the output 10PR1 that the negative electrode of described diode 1DD2 is described switching on/off circuit by resistance 1DR20.
The input of described voltage detecting circuit is that one end of resistance 1DR4 and the output of described circuit units are connected, the anodic bonding of the other end of described resistance 1DR4 and diode 1DD1, the negative electrode of described diode 1DD1 is connected with one end of resistance 1DR7 respectively at resistance 1DR1, the other end of described 1DR7 is connected to the first input end 1AD0 of described analog-digital converter by resistance 1DR6, electric capacity 1DC2 is connected with the first input end 1AD0 of described analog-digital converter with one end after resistance 1DR5 parallel connection, another some ground connection in parallel.
The input of described current detecting amplifying circuit is that one end of resistance 1DR20 is connected with the negative electrode of described diode 1DD1, diode 1DD10 is connected in parallel on the two ends of resistance 1DR20, the anode of described diode 1DD10 is connected to the positive input of operational amplifier DU5A by resistance 1DR21, the negative electrode of described diode 1DD10 is connected to the reverse input end of operational amplifier DU5A by resistance 1DR22, described operational amplifier DU5A is also by resistance 1DR23 ground connection, the plus earth of described operational amplifier DU5A, its negative pole connects external 24V power supply, its output is connected to reverse input end by resistance 1DR24, the output of current detecting amplifying circuit under the output of described operational amplifier DU5A also consists of resistance 1DR11, it is connected to the 3rd input 1AD3 of analog-digital converter, described the 3rd input 1AD3 is also by resistance 1DR10 ground connection.
A fire alarm control control method that adopts above fire alarm control system, comprises the steps:
(1) the unique address code of each field device configurations first connecting to circuit units;
(2) described battery unit is to system power supply, and system is started working, and sends synchronization pulse by main computer unit to two buses, and the signal returning by two buses records the background current size in two buses;
(3) main computer unit OPADD pulse signal, described address rushes signal after negater circuit second, sends address pulse signal by described on-off circuit to the field apparatus in two buses;
(4) field apparatus receive described synchronization pulse carry out synchronous after, receive after the described address pulse signal identical with own address code, return back code current pulse by the code current circuit that returns in two buses, described time code current pulse sent into main computer unit and processed after analog-digital converter converts data signal to, draws the duty of field apparatus;
(5) in the time that described main computer unit is judged field apparatus and is sent warning message, prompting gives the alarm to described human-computer dialogue unit by bus, and described main computer unit output command pulse signal, after oppositely, send by pulse modulated circuit the straight control unit that command pulse signal connects to the field apparatus in two buses of correspondence, after described straight control unit receives this command pulse signal, start field apparatus.
A described address pulse pulsewidth is 8ms, in described address pulse, No. 0 address is used for measuring background current, described address pulse comprises the time slot of address/confession electric pulse and instruction/acceptance, described address/power supply pulse voltage is that 24V, pulsewidth are 4ms, and the time slot voltage of described instruction/reception is that 10V, pulsewidth are 4ms.
Described time code current pulse comprises the categorical data of 4Bit position 2ms pulsewidth and the status data of 4Bit position 2ms pulsewidth.
In described step (4), the processing method of main computer unit is, while being 20mA after described time code current subtracting background electric current, described main computer unit is judged to be " 1 ", and during for 6mA, described main computer unit is judged to be " 0 ".
In described step (3), field apparatus transmission address pulse signal in two buses also comprises the step of carrying out shaping pulse by pulse shaper before, in described step (5), send command pulse signal to also comprising the step of carrying out shaping pulse by pulse shaper before the field apparatus in two buses of correspondence.
In whole process, also comprise that short-circuit detecting circuit detects the whether step of short circuit of two buses.
In whole process, also comprise by the step of multicomputer net unit and other fire alarm control system networking communications.
In whole process, also comprise by the step of linkage unit control bus field apparatus start and stop.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) fire alarm control system of the present invention, also comprises the circuit units that adopts two bus modes, and described circuit units comprises on-off circuit, pulse modulated circuit, returns code current circuit, analog-digital converter, field apparatus, on-off circuit, is connected with the output of pulse signal pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends address pulse signal, and working power is provided, pulse modulated circuit, is connected with the command pulse signal output pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends command pulse signal, return code current circuit, comprise high-side current mapping circuit, low side sample circuit and amplifying circuit, described high-side current mapping circuit is connected respectively with two bus high level lines and low level line, described low side sample circuit is connected with the low level line of described two buses, and described high-side current mapping circuit is connected with amplifying circuit after adopting circuit to be connected with described low side, the address pulse signal of main computer unit and command pulse signal are sent to field apparatus by described on-off circuit and pulse modulated circuit, by returning code current circuit, the digital information of field apparatus feedback is fed back to main computer unit again, transmitting procedure adopts two bus transmission model, and not only circuit structure is simple, failure rate is low, do not improving under the prerequisite of baud rate, in same polling period, reach up to a hundred sensing points and upload fire alarm information even if realized, also can realize within 2 second time and quoting simultaneously, having solved multiple-way system transmission line of the prior art exists quantity large, add up to fault rate high, the problem that time of fire alarming is grown, improve greatly the response time of fire alarm.
(2) fire alarm control system of the present invention and control method thereof, described circuit units comprises on-off circuit, pulse modulated circuit, returns code current circuit, analog-digital converter, field apparatus, described on-off circuit possesses function of supplying power simultaneously, simplify communication line, again can real-time detecting system equipment working state.
(3) fire alarm control system of the present invention and control method thereof, also comprise pulse shaper, be connected with described on-off circuit and pulse modulated circuit, to after described command pulse signal and address pulse signal shaping, export to field apparatus, described pulse shaper can be avoided the impact of capacitive load on two bus-structured circuit, thereby improves the anti-interference of data communication; Also comprise short-circuit detecting circuit, in described short-circuit detecting circuit, be provided with short circuit indicating device, in the time being short-circuited state, indicate, can react timely failure problems, so that quick solution circuit question, avoids not safeguarding and failing to report fire condition in time because of fault.
(4) fire alarm control system of the present invention and control method thereof, described circuit units, directly controls unit, linkage unit, main computer unit and connects by CAN bus; That CAN bus has is real-time, transmission range is far away, anti-electromagnetic interference capability is strong, cost is low, and error detecing capability is strong, can in strong noise interference environment, work; Have priority and arbitration function, described fire alarm control system can be realized multiple fire alarm control system networking work by multicomputer net unit.
(5) fire alarm control system of the present invention and control method thereof, also comprise communication processing unit, with described circuit units, directly control unit, linkage unit and main computer unit and be connected, described communication processing unit adopts CAN communication controller and CAN bus transceiver, transmission data are anti-interference strong, also can determine to receive or shield this message according to the ID of message; And there is reliable wrong processing and error-detection mechanism, and can, by outer set net communication unit and other fire alarm control system networking communications, share information.
(6) fire alarm control system of the present invention and control method thereof, described straight control unit adopts two-wire system communication, and be provided with manual output control model and automatic linkage output mode, under manual mode, can utilize button to complete the manual control to field apparatus, in the time that situation needs, carry out automatic linkage control by main computer unit by the logic interlock straight control of the formula commander unit of scene establishment, meet more practical operation needs.
(7) fire alarm control system of the present invention and control method thereof, also comprise human-computer dialogue unit, described human-computer dialogue unit comprises liquid crystal display, keyboard, buzzer, LED light, printer, touch-screen, loudspeaker, liquid crystal display and touch-screen make alarm indication content very clear, simple operation, clear, directly perceived, described buzzer and loudspeaker can real-time prompting alarm condition and system failure problems, and described printer can carry out real time print to warning message, fault message as required.
(8) fire alarm control system of the present invention and control method thereof, preferably be provided with two resistance at the two ends of CAN bus transceiver, these two resistance are for the coupling of bus impedance, play considerable effect, can improve anti-interference and the reliability of data communication, can cause communicating by letter as lacked. The resistance that the resistance input that CAN bus transceiver connects connects is called slope resistance, and the speed of communication depends on the resistance of slope resistance, and its resistance is less, and the speed of communication is faster.
(9) fire alarm control system of the present invention and control method thereof, in fire alarm control system control method of the present invention, described address cycle pulse is made up of address/confession electric pulse of 24V voltage 4ms pulsewidth and the instruction/received pulse of 10V voltage 4ms pulsewidth; Each address cycle pulse is taking 8ms as an address cycle; The addressing field apparatus that 1 cycle is patrolled and examined in realization only needs 2.1s, has shortened greatly alarm cycle.
(10) fire alarm control system of the present invention and control method thereof, battery unit comprises switching power supply, standby power unit, power supply automatic switch unit and power supply status collecting unit; Described switching power supply is to system power supply, and charges to the reserve battery in standby power unit, and described power supply automatic switch unit automatically switches to described standby power unit in the time of described switching power supply power-off; Described power supply status collecting unit gathers the voltage in described battery unit; obtain a result and show by described human-computer dialogue unit by judgement; ensure system power supply in all cases; and realize the automatic switchover between main power source and stand-by power supply; more intelligent protection system; save manpower, and battery electric quantity information can be shown to user by man-machine unit in time, maintain easily.
Brief description of the drawings
For content of the present invention is more likely to be clearly understood, below in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein,
Fig. 1 is the structured flowchart of an embodiment of fire alarm control system of the present invention;
Fig. 2 is the structured flowchart of another embodiment of fire alarm control system of the present invention;
Fig. 3 is the structured flowchart of communication processing unit in fire alarm control system of the present invention;
Fig. 4 is the circuit diagram of circuit units described in fire alarm control system of the present invention;
Fig. 5 is the circuit diagram of battery unit described in fire alarm control system of the present invention;
Fig. 6 is the circuit diagram of the unit of straight control described in fire alarm control system of the present invention.
Detailed description of the invention
The specific embodiment of fire alarm control system of the present invention and control method thereof is provided below.
Embodiment 1
As shown in Figure 1, it comprises the structure of fire alarm control system of the present invention:
Main computer unit, described main computer unit sends address pulse signal and command pulse signal, accepts feedback signal, and signal is processed and each unit is controlled;
Battery unit, is connected with main computer unit, gives system power supply;
Straight control unit, is connected respectively with main computer unit and field apparatus, directly controls field apparatus according to the instruction of described main computer unit;
Also comprise the circuit units that adopts two bus modes, described circuit units comprises on-off circuit, pulse modulated circuit, returns code current circuit, analog-digital converter, field apparatus; First described circuit units sends to field apparatus by address pulse signal, field apparatus is according to actual conditions feedback signal, send back described main computer unit by returning code current electric circuit inspection described in circuit units and amplifying, described main computer unit sends corresponding command pulse signal to straight control unit according to this data signal, and described straight control unit is according to the corresponding field apparatus of command pulse signal controlling.
On-off circuit, is connected with the output of pulse signal pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends address pulse signal, and working power is provided;
Pulse modulated circuit, is connected with the command pulse signal output pin of described main computer unit by negater circuit, and is connected with two bus high level lines, and the field apparatus in two buses sends command pulse signal;
Return code current circuit; comprise high-side current mapping circuit, low side sample circuit and amplifying circuit; described high-side current mapping circuit is connected respectively with two bus high level lines and low level line; described low side sample circuit is connected with the low level line of described two buses, and described high-side current mapping circuit is connected with amplifying circuit after adopting circuit to be connected with described low side;
Analog-digital converter, is connected respectively with described time code current circuit and main computer unit, and the signal of described time decoding circuit circuit is carried out inputting main computer unit after analog-to-digital conversion;
Field apparatus, is connected with high level line and the low level line of two buses, receives the signal in two buses.
Embodiment 2
On the basis of the fire alarm control system described in embodiment 1, described circuit units also comprises pulse shaper, be connected with described on-off circuit and pulse modulated circuit, to after described command pulse signal and address pulse signal shaping, export to field apparatus, described pulse shaper can be avoided the impact of capacitive load on two bus-structured circuit, thereby improves the anti-interference of data communication; Also comprise short-circuit detecting circuit, be connected respectively with described two bus high level lines and described analog-digital converter, detect the signal of telecommunication of described two buses and input described analog-digital converter; In described short-circuit detecting circuit, be provided with short circuit indicating device, in the time being short-circuited state, indicate, can react timely failure problems, so that quick solution circuit question is avoided not safeguarding and failing to report fire condition in time because of fault.
Embodiment 3
On the basis of the fire alarm control system described in above embodiment, described circuit units, directly control unit, main computer unit connects by CAN bus; That CAN bus has is real-time, transmission range is far away, anti-electromagnetic interference capability is strong, cost is low, and error detecing capability is strong, can in strong noise interference environment, work; Have priority and arbitration function, described fire alarm control system can be realized multiple fire alarm control system networking work by multicomputer net unit.
Also comprise linkage unit, described linkage unit is also connected with CAN bus, start and stop key in described linkage unit can be associated with any one or one group of bus field apparatus by definition, complete the on off control to this bus field apparatus, adopt Modular Structure Design, and can count according to the control of requirement of engineering flexible configuration, simple to operate, flexible configuration, user can open/stop single bus field apparatus with a button, also can open/stop one group of bus field apparatus with a button, can visual indication go out the current startup of bus field apparatus and feedback states, facilitate user to check, directly do not connect bus field apparatus, without external cabling.
Embodiment 4
On the fire alarm control system basis described in above embodiment, also comprise communication processing unit, as shown in Figure 2, with described circuit units, directly control unit, linkage unit and main computer unit and be connected, described communication processing unit is divided into internal communication unit and outer set net communication unit, described internal communication unit by two bus communication modes and described circuit units, directly control unit, linkage unit and main computer unit and carry out communication, described outer set net communication unit is by two bus communication modes and other fire alarm control system networking communications.
Described communication processing unit adopts CAN communication controller and CAN bus transceiver, adopts the independent CAN communication controller SJA1000 of PHILIPS company and the CAN bus communication interface of high-performance CAN bus transceiver PCA82C250 composition in described communication processing unit.
CAN communication controller SJA1000 has had the desired complete characteristic of CAN communication protocol, and the CAN communication controller SJA1000 connecting through simple bus can complete the physical layer of CAN bus and all functions of data link layer.
Described main computer unit is responsible for the initialization of CAN communication controller SJA1000, realize reception and the transmission of data by controlling CAN communication controller SJA1000, CAN communication controller SJA1000 is responsible for receiving and sending the data in CAN bus, and CAN bus transceiver 82C250 is physical interface and the driving element of CAN bus. While sending data, the data that fire alarm control unit transmits needs write the transmission buffering area of CAN controller, start and send, and data send in bus by CAN transceiver; While receiving data, CAN controller receives data by CAN transceiver from bus, deposits people reception buffer zone after processing, and provides receive interruption signal. At this moment, fire-alarm just can be taken data away from the reception buffer zone of CAN controller.
Preferably be provided with the resistance of two 20 Ω at the two ends of CAN bus transceiver, these two resistance, for the coupling of bus impedance, play considerable effect, can improve anti-interference and the reliability of data communication, can cause communicating by letter as lacked. Resistance between CAN bus transceiver 82C250 the 8th pin and ground is called slope resistance, and the speed of communication depends on the resistance of slope resistance, and its resistance is less, and the speed of communication is faster.
Embodiment 5
On the basis of the fire alarm control system described in above embodiment, described straight control unit adopts two-wire system communication, and be provided with manual output control model and automatic linkage output mode, under manual mode, can utilize button to complete the manual control to field apparatus, in the time that situation needs, carry out automatic linkage control by main computer unit by the logic interlock straight control of the formula commander unit of scene establishment, meet more practical operation needs.
Also comprise human-computer dialogue unit, described human-computer dialogue unit comprises liquid crystal display, keyboard, buzzer, LED light, printer, touch-screen, loudspeaker, for facilitate user clear and intuitive check fire alarm control unit running status and carry out parameter setting, system is preferably provided with the complete Chinese liquid crystal display of LCD, various operations provide prompting with menu-style, and can carry out address annotation by special-purpose software; The address annotation of changing for scene, can directly modify by panel button, can adopt Chinese character and character to mix pattern of annotated information, maximum 8 Chinese characters or 16 characters to address points; And can show and concrete equipment, the room number of fault or warning make alarm indication content very clear, operate convenient, clear, directly perceived, realize good human-computer dialogue; In described keyboard, be preferably provided with SF, as " noise reduction " key is eliminated the sound alarm signal of watch-dog for reporting to the police, under malfunction; In the time having new warning or fault message to occur, the sound alarm of watch-dog will be sent again, " reset " key is for making monitoring system soft reboot operation, these keys can complete interactive input function well, the instruction of some important process states is set, as states such as operation, warning, faults, buzzer and loudspeaker are set and can point out fire alarm control unit fault, alarm condition, described printing function automatic printing control function, the real time print that switch carries out operational information recordings such as warning, faults as required. In the time having warning, fire alarm control unit sends fire alarm acoustical signal and reminds staff to solve in time processing, and this signal can manually be eliminated, in the time having again alarm signal input, fire alarm acoustical signal can start again, and gives maintenance, until fire alarm control unit resets.
Embodiment 6
On the basis of the fire alarm control system described in above embodiment, as shown in Figure 3, described on-off circuit comprises the first NAND gate circuit U2A, its first input end is connected with the address pulse signal output pin of described main computer unit, described main computer unit preferably comprises single-chip microcomputer, the preferred W78E516 single-chip microcomputer that adopts, describedly be connected with its first input end with the second input of the first NAND gate circuit U2A, it is described on-off circuit input that the output of described the first NAND gate U2A is connected to resistance R 5 one end, the other end of described resistance R 5 is connected to the base stage of triode T2, the colelctor electrode of described triode T2 is connected to the base stage of power switch pipe T1 by resistance R 4, the colelctor electrode of described power switch pipe T1 is connected with two bus high level line L+, the emitter stage of described power switch pipe T1 is connected with its base stage by resistance R 3, the emitter stage of described power switch pipe T1 is also connected with external 24V power supply.
Described pulse modulated circuit comprises the second NAND gate U3A, its first input end is connected with the command pulse signal output pin of described main computer unit, the second input of described the second NAND gate U3A is connected with its first input end, the output of described the second NAND gate U3A is connected with one end of resistance R 10, the other end of described resistance R 10 is connected to the base stage of triode T5, the colelctor electrode of described triode T5 is connected to external 24V power supply by resistance R 11, described external 24V power supply is also connected to the input of three-terminal voltage-stabilizing pipe T11, the colelctor electrode of described triode T5 is also connected to the base stage of triode T6, the emitter stage of described triode T6, after one end parallel connection of one end of resistance R 12 and capacitor C 2, be connected with the emitter stage of triode T5, the colelctor electrode of described triode T6, after the other end parallel connection of the other end of resistance R 12 and capacitor C 2, be connected to the adjustment end of three-terminal voltage-stabilizing pipe T11, resistance R 13 is connected to the output of three terminal regulator T11 and adjusts between end, the output of described three terminal regulator T11 is also by the resistance R 15 of connecting successively, R16 is connected to the anode of diode D1, the negative electrode of described diode D1 is connected to the high level line L+ of two buses.
High-side current mapping circuit described in described time code current circuit is connected with two bus two ends, in described high-side current mapping circuit, the colelctor electrode of triode T7 is connected with the low level line L-of described two buses, the emitter stage of described triode T7 is connected between resistance R 15 and the output of three-terminal voltage-stabilizing pipe T11 by resistance R 14, the base stage of described triode T7 is connected with the output of operational amplifier U4A, the reverse input end of described operational amplifier U4A is connected with the emitter stage of triode T7, the positive input of described operational amplifier U4A is connected between resistance R 15 and R16, the plus earth of described operational amplifier, its negative pole connects external 24V power supply, the positive input that the low level line L-of described two buses is also operational amplifier U4B with the input of amplifying circuit is connected, described low side sample circuit is sampling resistor R19, after the anode of one end of described sampling resistor R19 and electric capacity D2 is in parallel, be connected to the positive input of described operational amplifier U4B, after the negative electrode of the other end of sampling resistor R19 and electric capacity D2 is in parallel, be connected to the input anyway of described operational amplifier U4B by resistance R 18, the point ground connection in parallel of described resistance R 18 and R19, resistance R 17 is connected to the output of operational amplifier U4B and anyway between input, the output of described operational amplifier U4B is the output of described amplifying circuit, it is connected to the IN0 input of analog-digital converter U1.
Described pulse shaper comprises resistance R 7, one end of described resistance R 7 is connected with the output of described the second NAND gate U3A, the output of described the first NAND gate circuit U2A is one end of contact resistance R6 also, after the other end parallel connection of described resistance R 7 and R6, be connected with the base stage of triode T4, the parallel connection point of the emitter stage of described triode T4 and the emitter stage of triode T3 is connected and ground connection with the emitter stage of triode T2, after the base stage of the colelctor electrode of described triode T4 and triode T3 is in parallel, be connected to two bus high level line L+ by resistance R 8, the colelctor electrode of described triode T3 is connected to two bus high level line L+ by resistance R 9.
The input of described short-circuit detecting circuit is that one end of resistance R 1 and the IN1 input of described analog-digital converter U1 are connected, the other end of described resistance R 1 is connected to short circuit indicating device, described short circuit indicating device is luminous tube L1, the negative electrode of described luminous tube L1 is connected with resistance R 1, the anodic bonding of described luminous tube L1 is to the high level line L+ of two buses, one end ground connection after resistance R 2 is in parallel with capacitor C 1, the other end is connected to the IN1 input of analog-digital converter U1.
The each circuit working principle of fire alarm control unit circuit units of the present invention is as follows:
Described main computer unit send address pulse signal after reverse with the first not circuit U2 to P1 port, through the resistance R 3 of power switch pipe T1 and periphery, the on-off circuit of R4, R5 composition, field apparatus on two bus high level line L+ sends address pulse signal, simultaneously for detector, module etc. provide working power. In the time that P1 mouth signal is high level, make triode T2 conducting by resistance R 5, thereby make power switch pipe T1 conducting, P1 mouth signal makes triode T4 conducting by resistance R 5 simultaneously, triode T3 cut-off, high level line L+ output 24V high level. In the time that P1 mouth signal is low level, triode T2 cut-off, triode T3 conducting, thus power switch pipe T1 is also ended, high level line L+ output 0V low level.
Described main computer unit send command pulse signal after reverse with the second not circuit U3 to P0 port, after the pulse modulated circuit being formed by three-terminal voltage-stabilizing pipe T11, triode T5, T6 and peripheral resistance R 10, R11, R12, R13 and capacitor C 2, export 0-10V voltage, field apparatus in two buses sends command pulse signal, supplies back the work of code receiving test circuit simultaneously. Described three-terminal voltage-stabilizing pipe preferably adopts LM317, and filter capacitor C2 Main Function is to reduce the pulse voltage of output with radio-frequency component, suppresses self-oscillation and reduces the ripple that external interference is brought. In the time that P0 mouth signal is high level, make triode T5 conducting by resistance R 10, triode T6 cut-off, thus make three-terminal voltage-stabilizing pipe T11 output 10.6V high level, high level line L+ output 10V high level; In the time that P0 mouth signal is low level, triode T5 cut-off, triode T6 conducting, thus make three-terminal voltage-stabilizing pipe T11 output 1.2V low level, high level line L+ output 0V low level. After the pulse shaper that high level line L+ output forms through resistance R 6, R7, R8, the R9 of triode T3, T4 and periphery again, send into detector detector, module etc., shaping circuit can be avoided the impact of capacitive load on bus-structured circuit.
The code reception signal that returns of described circuit units is by returning code current circuit, comprising what high-side current mapping circuit, low side sample circuit and amplifying circuit were realized, return code current one tunnel two bus low level line end L-, after sampling sampling resistor R19, form pulse voltage, sample through resistance R 15 in another road, operational amplifier U4A and triode T7, the high level line end electric current mapping circuit that resistance R 14 forms, be added on sampling sampling resistor R19 with the electric current of low level line end L-, current signal transfers voltage signal to, again through operational amplifier U4B and resistance R 17, signal is amplified output S0 by the amplifying circuit of R18 composition, S0 sends into main computer unit processing after analog-digital converter U1 conversion, the background current value that main computer unit was adopted the different periods, signal code value, magnitude of voltage carries out fuzzy intelligence Algorithm Analysis processing, draw accurately the various running state information of field apparatus.
Described short-circuit detecting circuit is made up of resistance R 1, R2 and capacitor C 1, when in bus when circuit normal operation, L+ upper pulse voltage in loop is lighted luminous tube L1, instruction normal operating condition, again through resistance R 1, R2 dividing potential drop, after capacitor C 1 filtering, output 2.5V pulse, enters analog to digital conversion circuit U1 from S1 port and converts to and send into main computer unit data signal and carry out analyzing and processing. In the time of bus short circuit, L+ upper pulse voltage in loop is through diode D2 ground connection, thereby make power switch pipe T1 cut-off, output low level, luminous tube L1 is extinguished, instruction short trouble state, the S1 Port detecting of analog to digital conversion circuit U1 is to 0V voltage, converts to send into main computer unit after data signal and carry out analyzing and processing.
Embodiment 7
Battery unit comprises switching power supply, standby power unit, power supply automatic switch unit and power supply status collecting unit; Described switching power supply is to system power supply, and charge to the reserve battery in standby power unit, described power supply automatic switch unit automatically switches to described standby power unit when main electric power-off in described switching power supply, after switching power supply powers on again, power supply automatic switch unit automatically switches to Switching Power Supply power supply.
Described power supply status collecting unit gathers the voltage in described battery unit, is obtained a result and is shown by described human-computer dialogue unit by judgement, and in the time of main electricity power supply, panel " main electricity " lamp is bright; When standby electricity power supply, " standby electricity " lamp is bright and report main electric fault.
On start-up mode, do particular design for the protection to reserve battery,, the in the situation that of dereliction electricity, used separately reserve battery cannot start controller start.
Described standby power unit comprises charging circuit of stand-by battery, as shown in Figure 4, the input of described charging circuit of stand-by battery i.e. three terminal voltage voltage-stablizer UV2 is connected with main power source VAA+, the colelctor electrode of triode TV3 is by the resistance R V17 output that be connected to described three terminal voltage voltage-stablizer UV2s in parallel with the emitter stage of triode TV2, the colelctor electrode of described triode TV3 is also connected with the adjustment end of described three terminal voltage voltage-stablizer UV2, the emitter stage of described triode TV3 is also connected with the adjustment end of described three end power regulator UV2 by resistance R V13, the colelctor electrode of described triode TV2 is connected by the base stage with triode TV3 of resistance R V9 parallel connection with the colelctor electrode of triode TVB1 by resistance R V15, between the colelctor electrode of described triode TVB1 and resistance R V9, be also connected with diode DVB1, resistance R V13 is connected between the base stage and emitter stage of triode TV2, the base stage of described triode TV2 also with the anodic bonding of diode DV2, the negative electrode of described diode DV2 is connected with stand-by power supply VBB+, the base stage of described triode TVB1 is connected with the negative electrode of diode ZVB1 by resistance R VB2, the anode of described diode ZVB1 is connected with stand-by power supply VBB+, described stand-by power supply VBB+ is connected with the first contact of relay R LY1 switch, the public contact of described relay R LY1 is connected with reserve battery by fuse FV2, the second contact of described relay R LY1 is connected with buzzer one end, the adjustment end of described three terminal voltage voltage-stablizer UV2 is connected with the other end of described buzzer with after the emitter stage of triode TV3 and the emitter stage parallel connection of triode TV1 by resistance R V18, the grounded emitter of described triode TV1, the colelctor electrode of described triode TV1 is connected with coil one end of relay R LY1, the other end of the coil of described relay R LY1 is connected with the emitter stage of described triode TVB1, the base stage of described triode TV1 is connected to the anode of diode ZV1 by resistance R V5, the negative electrode of described diode ZV1 is connected between the coil of relay R LY1 and the emitter stage of triode TVB1 and external 1V voltage.
Embodiment 8
On the basis of the fire alarm control system described in above embodiment, as shown in Figure 5, described straight control unit comprises switching on/off circuit, current detecting amplifying circuit and voltage detecting circuit, described switching on/off circuit is connected with described main computer unit output, the output of described switching on/off circuit is connected with field apparatus, described current detecting amplifying circuit is connected with described circuit units with voltage detecting circuit, and be connected respectively to analog-digital conversion circuit as described, described main computer unit sends enabling signal to described switching on/off circuit, control the start and stop of field apparatus, through described current detecting amplifying circuit, processing sends to analog-digital conversion circuit as described to the current signal of described circuit units, its voltage signal sends to analog-digital conversion circuit as described through described voltage detecting circuit processing.
The input of the switching on/off circuit of described straight control unit is that one end of coil and the signal output part of described main computer unit of relay 1JQ1 is connected, the other end ground connection of described relay 1JQ1 coil, diode 1DD7 is connected on relay 1JQ1 coil two ends, switch one end of described relay 1JQ1 is connected with external power supply CV+, described external power supply CV+ is also connected with one end of resistance 1DR1, the other end of described relay 1JQ1 switch connects the anode of diode 1DD2, the output 10PR1 that the negative electrode of described diode 1DD2 is described switching on/off circuit by resistance 1DR20.
The input of described voltage detecting circuit is that one end of resistance 1DR4 and the output of described circuit units are connected, the anodic bonding of the other end of described resistance 1DR4 and diode 1DD1, the negative electrode of described diode 1DD1 is connected with one end of resistance 1DR7 respectively at resistance 1DR1, the other end of described 1DR7 is connected to the first input end 1AD0 of described analog-digital converter by resistance 1DR6, electric capacity 1DC2 is connected with the first input end 1AD0 of described analog-digital converter with one end after resistance 1DR5 parallel connection, another some ground connection in parallel.
The input of described current detecting amplifying circuit is that one end of resistance 1DR20 is connected with the negative electrode of described diode 1DD1, diode 1DD10 is connected in parallel on the two ends of resistance 1DR20, the anode of described diode 1DD10 is connected to the positive input of operational amplifier DU5A by resistance 1DR21, the negative electrode of described diode 1DD10 is connected to the reverse input end of operational amplifier DU5A by resistance 1DR22, described operational amplifier DU5A is also by resistance 1DR23 ground connection, the plus earth of described operational amplifier DU5A, its negative pole connects external 24V power supply, its output is connected to reverse input end by resistance 1DR24, the output of current detecting amplifying circuit under the output of described operational amplifier DU5A also consists of resistance 1DR11, it is connected to the 3rd input 1AD3 of analog-digital converter, described the 3rd input 1AD3 is also by resistance 1DR10 ground connection.
Interlock starting device, single-chip microcomputer sends enabling signal RUN1 after signal being detected, makes relay 1JQ1 closure, and output 24V voltage CV+ to 1OPR1 brings in control appliance and starts field apparatus action. The current detecting amplifying circuit that the current signal in straight control unit controls loop forms through resistance 1DR20,1DR21,1DR22,1DR23,1DR24, diode 1DD10, amplifier DU5A is input to AD0, the voltage signal of control loop is inputted AD3 through resistance 1DR4, diode 1DD1,1DR1,1DR7,1DR5,1DR6, and AD0 and AD3 carry out data analysis processing to single-chip microcomputer after by A/D analog-to-digital conversion.
Embodiment 9
A fire alarm control method that adopts the fire alarm control system described in above embodiment, is characterized in that, comprises the steps:
(1) the unique address code of each field device configurations first connecting to circuit units;
(2) described battery unit is to system power supply, and system is started working, and sends synchronization pulse by main computer unit to two buses, and the signal returning by two buses records the background current size in two buses;
(3) main computer unit OPADD pulse signal, described address rushes signal after negater circuit second, sends address pulse signal by described on-off circuit to the field apparatus in two buses;
(4) field apparatus receive described synchronization pulse carry out synchronous after, receive after the described address pulse signal identical with own address code, return back code current pulse by the code current circuit that returns in two buses, described time code current pulse sent into main computer unit and processed after analog-digital converter converts data signal to, draws the duty of field apparatus;
(6) in the time that described main computer unit is judged field apparatus and is sent warning message, prompting gives the alarm to described human-computer dialogue unit by bus, and described main computer unit output command pulse signal, after oppositely, send by pulse modulated circuit the straight control unit that command pulse signal connects to the field apparatus in two buses of correspondence, after described straight control unit receives this command pulse signal, start field apparatus.
Embodiment 10
A described address cycle pulse is 8ms, as shown in Figure 4, a polling period preferably comprises 1 synchronizing cycle and 256 address cycle pulses, in described address cycle pulse, No. 0 address is used for measuring background current, in described address cycle pulse voltage be 24V pulsewidth be 4ms be address/confession electric pulse, wherein voltage be 10V pulsewidth be 4ms be the time slot of instruction/reception, the addressing field apparatus that one-period is patrolled and examined in realization only needs 2.1s, and the address of patrolling and examining of circuit units of the present invention is only formed with 1 4ms high level and the low level square wave of 4ms, there is pulsewidth wide, only have the address of a baud position to patrol and examine code, interference free performance is very high, patrol and examine per-word error probability extremely low.
In described step (3), the field apparatus transmission address pulse signal in two buses also comprises the step of carrying out shaping pulse by pulse shaper before; In described step (5), send command pulse signal to also comprising the step of carrying out shaping pulse by pulse shaper before the field apparatus in two buses of correspondence; In whole process, also comprise that short-circuit detecting circuit detects the whether step of short circuit of two buses; When detecting two bus short circuits, described short-circuit detecting circuit indicates by short circuit indicating device.
Described main computer unit sends 100ms lock-out pulse and measures background current, first when the background current that records bus can be avoided next receiving addressing field apparatus and returns coded signal, avoid the operating current of field apparatus, insulation leakagel volume leakage electric currents etc. are on detecting back the impact of code data signal, field apparatus receives after the address code identical with own address, preferably return the 8Bit bit data being formed by type and conditional code on bus with digitlization current system respectively according to the order of sequence at bus DC10V pulse groove, described time code current pulse preferably comprises the categorical data of 4Bit position 2ms pulsewidth and the status data of 4Bit position 2ms pulsewidth, the processing method that described step (4) main computer unit judges field apparatus duty is preferably described while returning after code current subtracting background electric current as 20mA, and described main computer unit is judged to be " 1 ", and during for 6mA, described main computer unit is judged to be " 0 ".
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment. For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description. Here without also giving exhaustive to all embodiments. And the apparent variation of being extended out thus or variation are still among the protection domain in the invention。

Claims (28)

1. a fire alarm control system, comprising:
Main computer unit, described main computer unit sends address pulse signal and command pulse signal, and receives the data signal of feedback, to letterNumber process and each unit is controlled;
Battery unit, is connected with main computer unit, gives system power supply;
Straight control unit, is connected respectively with main computer unit and field apparatus, directly controls scene establish according to the instruction of described main computer unitStandby;
It is characterized in that, also comprise the circuit units that adopts two bus modes, described circuit units comprises on-off circuit, impulse modulation electricityRoad, time code current circuit, analog-digital converter, field apparatus;
On-off circuit, is connected with the output of pulse signal pin of described main computer unit by negater circuit, and connects with two bus high level linesConnect, the field apparatus in two buses sends address pulse signal, and working power is provided;
Pulse modulated circuit, is connected with the command pulse signal output pin of described main computer unit by negater circuit, and high electric with two busesHorizontal line connects, and the field apparatus in two buses sends command pulse signal;
Return code current circuit, comprise high-side current mapping circuit, low side sample circuit and amplifying circuit, described high-side current mapping electricityRoad is connected respectively with two bus high level lines and low level line, and the low level line of described low side sample circuit and described two buses connectsConnect, described high-side current mapping circuit is connected with amplifying circuit after being connected with described low side sample circuit;
Analog-digital converter, is connected respectively with described time code current circuit and main computer unit, and the signal of described time code current circuit is carried out to mouldAfter number conversion, input main computer unit;
Field apparatus, is connected with high level line and the low level line of two buses, receives the signal in two buses.
2. fire alarm control system according to claim 1, is characterized in that, described circuit units also comprises shaping pulseCircuit, is connected with described on-off circuit and pulse modulated circuit, by defeated after described command pulse signal and address pulse signal shapingGo out to field apparatus; Also comprise short-circuit detecting circuit, be connected respectively with described two bus high level lines and described analog-digital converter,Detect the signal of telecommunication of described two buses and input described analog-digital converter; In described short-circuit detecting circuit, be provided with short circuit instruction dressPut, in the time being short-circuited state, indicate.
3. fire alarm control system according to claim 1 and 2, is characterized in that, described circuit units, straight control listUnit, main computer unit connect by CAN bus.
4. fire alarm control system according to claim 1, is characterized in that, also comprises multicomputer net unit, described fireAlarm control system can be realized multiple fire alarm control system networking work by multicomputer net unit.
5. fire alarm control system according to claim 3, is characterized in that, also comprises linkage unit, described linkage unitAlso be connected with CAN bus, the start and stop key in described linkage unit can be by definition and any one or one group of bus field apparatusAssociation, completes the on off control to this bus field apparatus.
6. fire alarm control system according to claim 5, is characterized in that, also comprises communication processing unit, described logicalNews processing unit is divided into internal communication unit and outer set net communication unit, and described internal communication unit is by two bus communication modesWith described circuit units, directly control unit, linkage unit and main computer unit and carry out communication, described outer set net communication unit is by twoBus communication mode and other fire alarm control system networking communications.
7. fire alarm control system according to claim 6, is characterized in that, described communication processing unit adopts CAN logicalNews controller and CAN bus transceiver, the two ends of described CAN bus transceiver are respectively equipped with two resistance, described CANThe resistance input of bus transceiver is connected with slope resistance.
8. according to the fire alarm control system described in claim 1 or 5 or 6 or 7 any one, it is characterized in that, described straight control is singleUnit adopts two-wire system communication, and is provided with manual output control model and automatic linkage output mode.
9. fire alarm control system according to claim 8, is characterized in that, also comprises human-computer dialogue unit, described man-machineDialog unit comprises liquid crystal display, keyboard, buzzer, LED light, printer, touch-screen, loudspeaker.
10. fire alarm control system according to claim 2, is characterized in that, described on-off circuit comprises the first NAND gateCircuit U 2A, its first input end is connected with the address pulse signal output pin of the main computer unit in described circuit units, described inThe second input of the first NAND gate circuit U2A is connected with its first input end, the output of described the first NAND gate circuit U2AIt is described on-off circuit input that end is connected to resistance R 5 one end, and the other end of described resistance R 5 is connected to the base of triode T2The utmost point, the colelctor electrode of described triode T2 is connected to the base stage of power switch pipe T1, described power switch pipe by resistance R 4The colelctor electrode of T1 is connected with two bus high level line L+, and the emitter stage of described power switch pipe T1 is by resistance R 3 and its base stageConnect, the emitter stage of described power switch pipe T1 is also connected with external 24V power supply.
11. fire alarm control systems according to claim 10, is characterized in that, described pulse modulated circuit comprise second withNot gate U3A, its first input end is connected with the command pulse signal output pin of described main computer unit, described the second NAND gateThe second input of U3A is connected with its first input end, one end of the output of described the second NAND gate U3A and resistance R 10Connect, the other end of described resistance R 10 is connected to the base stage of triode T5, and the colelctor electrode of described triode T5 passes through resistanceR11 is connected to external 24V power supply, and described external 24V power supply is also connected to the input of three-terminal voltage-stabilizing pipe T11, described threeThe colelctor electrode of utmost point pipe T5 is also connected to the base stage of triode T6, the emitter stage of described triode T6, one end of resistance R 12 andAfter one end parallel connection of capacitor C 2, be connected the colelctor electrode of described triode T6, resistance R 12 another with the emitter stage of triode T5The adjustment end that is connected to three-terminal voltage-stabilizing pipe T11 after the other end parallel connection of one end and capacitor C 2, resistance R 13 is connected to three-terminal voltage-stabilizingThe output of pipe T11 and adjusting between end, the output of described three-terminal voltage-stabilizing pipe T11 also the resistance R 15 by connecting successively,R16 is connected to the anode of diode D1, and the negative electrode of described diode D1 is connected to the high level line L+ of two buses.
12. fire alarm control systems according to claim 11, is characterized in that, high-end described in described time code current circuitElectric current mapping circuit is connected with two bus two ends, the colelctor electrode of triode T7 and described two total in described high-side current mapping circuitThe low level line L-of line connects, and the emitter stage of described triode T7 is connected to resistance R 15 and three-terminal voltage-stabilizing pipe by resistance R 14Between the output of T11, the base stage of described triode T7 is connected with the output of operational amplifier U4A, described operation amplifierThe reverse input end of device U4A is connected with the emitter stage of triode T7, and the positive input of described operational amplifier U4A connectsBetween resistance R 15 and R16, the plus earth of described operational amplifier U4A, its negative pole connects external 24V power supply, instituteThe positive input that the low level line L-that states two buses is also operational amplifier U4B with the input of amplifying circuit is connected, described inLow side sample circuit is sampling resistor R19, after the anode of one end of described sampling resistor R19 and electric capacity D2 is in parallel, is connected to instituteState the positive input of operational amplifier U4B, the other end of sampling resistor R19 is in parallel afterwards by electricity with the negative electrode of electric capacity D2Resistance R18 is connected to the reverse input end of described operational amplifier U4B, ground connection, the electricity put in parallel of described resistance R 18 and R19Resistance R17 is connected between the output and reverse input end of operational amplifier U4B, the output of described operational amplifier U4BFor the output of described amplifying circuit, it is connected to the IN0 input of analog-digital converter.
13. according to the fire alarm control system described in claim 11 or 12 any one, it is characterized in that described shaping pulse electricityRoad comprises resistance R 7, and one end of described resistance R 7 is connected with the output of described the second NAND gate U3A, the first NAND gate electricityThe output of road U2A is one end of contact resistance R6 also, after the other end parallel connection of described resistance R 7 and R6 with triode T4'sBase stage connects, and the parallel connection point of the emitter stage of the emitter stage of described triode T4 and triode T3 and the emitter stage of triode T2 connectConnect and ground connection, after the base stage of the colelctor electrode of described triode T4 and triode T3 is in parallel, be connected to two buses by resistance R 8High level line L+, the colelctor electrode of described triode T3 is connected to two bus high level line L+ by resistance R 9.
14. fire alarm control systems according to claim 2, is characterized in that, the input of described short-circuit detecting circuitOne end of resistance R 1 is connected with the IN1 input of described analog-digital converter, and the other end of described resistance R 1 is connected to short circuit and refers toShowing device, described short circuit indicating device is luminous tube L1, the negative electrode of described luminous tube L1 is connected with resistance R 1, described luminousManage the anodic bonding of L1 to the high level line L+ of two buses, one end ground connection after resistance R 2 is in parallel with capacitor C 1, the other end connectsAt the IN1 of analog-digital converter input.
15. fire alarm control systems according to claim 9, is characterized in that, battery unit comprise switching power supply,Standby power unit, power supply automatic switch unit and power supply status collecting unit; Described switching power supply is to system power supply, andCharge to the reserve battery in standby power unit, described power supply automatic switch unit is in the time of described switching power supply power-offAutomatically switch to described standby power unit; Described power supply status collecting unit gathers the voltage in described battery unit, by sentencingBreak and obtain a result and show by described human-computer dialogue unit.
16. fire alarm control systems according to claim 15, is characterized in that, described standby power unit comprises electricity for subsequent usePond charging circuit, the input of described charging circuit of stand-by battery is that three terminal voltage voltage-stablizer UV2 and main power source VAA+ connectConnect, what the emitter stage of the colelctor electrode of triode TV3 by resistance R V17 and triode TV2 was in parallel is connected to described three end electricityPress the output of voltage-stablizer UV2, the colelctor electrode of described triode TV3 also with the adjustment of described three terminal voltage voltage-stablizer UV2End connects, and the emitter stage of described triode TV3 is also by the adjustment end of resistance R V13 and described three terminal voltage voltage-stablizer UV2Connect, the colelctor electrode of described triode TV2 passes through resistance R V9 also by the colelctor electrode of resistance R V15 and triode TVB1Connection the base stage with triode TV3 be connected, the link of the colelctor electrode of described triode TVB1 and resistance R V9 also with two utmost pointsThe negative electrode of pipe DVB1 connects, and resistance R V13 is connected between the base stage and emitter stage of triode TV2, described triodeThe base stage of TV2 also with the anodic bonding of diode DV2, the negative electrode of described diode DV2 is connected with stand-by power supply VBB+,The base stage of described triode TVB1 is connected with the negative electrode of diode ZVB1 by resistance R VB2, described diode ZVB1'sAnode is connected with stand-by power supply VBB+, and described stand-by power supply VBB+ is connected with the first contact of relay R LY1 switch, instituteThe public contact of stating relay R LY1 is connected with reserve battery by fuse FV2, the second contact of described relay R LY1Be connected with buzzer one end, the adjustment end of described three terminal voltage voltage-stablizer UV2 is sent out by resistance R V18 and triode TV3'sAfter the emitter stage parallel connection of emitter-base bandgap grading and triode TV1, be connected the emitter stage of described triode TV1 with the other end of described buzzerGround connection, the colelctor electrode of described triode TV1 is connected with coil one end of relay R LY1, the coil of described relay R LY1The other end be connected with the emitter stage of described triode TVB1, the base stage of described triode TV1 is connected to by resistance R V5The anode of diode ZV1, the negative electrode of described diode ZV1 is connected to the coil of relay R LY1 and triode TVB1Between emitter stage and external 1V voltage.
17. fire alarm control systems according to claim 1, is characterized in that, described straight control unit comprise switching on/off circuit,Current detecting amplifying circuit and voltage detecting circuit, described switching on/off circuit is connected with described main computer unit output, described start and stop electricityThe output on road is connected with field apparatus, and described current detecting amplifying circuit is connected with described circuit units with voltage detecting circuit,And being connected respectively to described analog-digital converter, described main computer unit sends enabling signal to described switching on/off circuit, controls field apparatusStart and stop, processing sends to described analog-digital converter through described current detecting amplifying circuit for the current signal of described circuit units,Its voltage signal sends to described analog-digital converter through described voltage detecting circuit processing.
18. fire alarm control systems according to claim 17, is characterized in that, the switching on/off circuit of described straight control unit defeatedEntering end is that one end of coil and the signal output part of described main computer unit of relay 1JQ1 is connected, described relay 1JQ1 lineThe other end ground connection of circle, diode 1DD7 is connected on relay 1JQ1 coil two ends, switch one end of described relay 1JQ1CV+ is connected with external power supply, and described external power supply CV+ is also connected with one end of resistance 1DR1, and described relay 1JQ1 opensThe other end closing connects the anode of diode 1DD2 by resistance 1DR20, the negative electrode of described diode 1DD2 opens described in beingThe output 10PR1 on power failure road.
19. fire alarm control systems according to claim 18, is characterized in that, the input of described voltage detecting circuitOne end of resistance 1DR4 is connected with the output of described circuit units, the other end of described resistance 1DR4 and diode 1DD1Anodic bonding, the negative electrode of described diode 1DD1 is connected with one end of resistance 1DR1 and resistance 1DR7 respectively, described inThe other end of 1DR7 is connected to the first input end 1AD0 of described analog-digital converter, electric capacity 1DC2 and electricity by resistance 1DR6After resistance 1DR5 parallel connection, one end is connected with the first input end 1AD0 of described analog-digital converter, another some ground connection in parallel.
20. fire alarm control systems according to claim 19, is characterized in that, the input of described current detecting amplifying circuitEnd is that one end of resistance 1DR20 is connected with the negative electrode of described diode 1DD1, and diode 1DD10 is connected in parallel on resistance 1DR20Two ends, the anode of described diode 1DD10 is connected to the forward input of operational amplifier DU5A by resistance 1DR21End, the negative electrode of described diode 1DD10 is connected to the reverse input end of operational amplifier DU5A, institute by resistance 1DR22State operational amplifier DU5A also by resistance 1DR23 ground connection, the plus earth of described operational amplifier DU5A, its negative poleConnect external 24V power supply, its output is connected to reverse input end by resistance 1DR24, described operational amplifier DU5AOutput also form the output of described current detecting amplifying circuit by resistance 1DR11, it is connected to analog-digital converterThe 3rd input 1AD3, described the 3rd input 1AD3 is also by resistance 1DR10 ground connection.
21. 1 kinds of rights to use require the fire alarm control method of the fire alarm control system described in 1-20 any one, and its feature existsIn, comprise the steps:
(1) the unique address code of each field device configurations first connecting to circuit units;
(2) described battery unit is to system power supply, and system is started working, and sends synchronization pulse by main computer unit to two buses,The signal returning by two buses records the background current size in two buses;
(3) main computer unit OPADD pulse signal, described address pulse signal is after negater circuit, by described on-off circuitField apparatus in two buses sends address pulse signal;
(4) field apparatus receive described synchronization pulse carry out synchronous after, receive the described address arteries and veins identical with own address codeRush after signal, return back code current pulse by the code current circuit that returns in two buses, described time code current pulse turns through modulusParallel operation converts to be sent into main computer unit after data signal and processes, and draws the duty of field apparatus;
(5) in the time that described main computer unit is judged field apparatus and sent warning message, give the alarm to human-computer dialogue unit by busPrompting, and described main computer unit output command pulse signal, after oppositely, send command pulse by pulse modulated circuitThe straight control unit that signal connects to the field apparatus in two corresponding buses, described straight control unit receives after this command pulse signalStart field apparatus.
22. control methods according to claim 21, is characterized in that, the pulsewidth of described address pulse signal is 8ms, instituteState No. 0 address in address pulse signal and be used for measuring background current, described address pulse signal comprises address/confession electric pulse and refers toThe time slot of order/acceptance, described address/power supply pulse voltage is that 24V, pulsewidth are 4ms, the time slot voltage of described instruction/acceptance is10V, pulsewidth are 4ms.
23. control methods according to claim 22, is characterized in that, described time code current pulse comprises 4Bit position 2ms pulsewidthCategorical data and the status data of 4Bit position 2ms pulsewidth.
24. control methods according to claim 21, is characterized in that, the processing method of main computer unit in described step (4)For, while being 20mA after time code current subtracting background electric current, described main computer unit is judged to be " 1 ", during for 6mA, described inMain computer unit is judged to be " 0 ".
25. control methods according to claim 21, is characterized in that, in described step (3), to showing in two busesField device also comprises the step of carrying out shaping pulse by pulse shaper before sending address pulse signal, in described step(5), in, send command pulse signal and also comprise by pulse shaper to before the field apparatus in two buses of correspondenceThe step of horizontal pulse shaping.
26. according to the control method described in claim 21-25 any one, it is characterized in that, in whole process, also comprises short circuit inspectionSlowdown monitoring circuit detects the whether step of short circuit of two buses.
27. control methods according to claim 26, is characterized in that, in whole process, also comprise by multimachine networking listThe step of unit and other fire alarm control system networking communications.
28. control methods according to claim 27, is characterized in that, in whole process, also comprise by linkage unit controlThe step of bus field apparatus processed start and stop.
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CN105049311B (en) * 2015-09-17 2019-03-29 北京建安成自动化电控技术有限公司 Two-bus communication and communication system
CN106647919B (en) * 2017-01-17 2018-09-18 深圳市泛海三江电子股份有限公司 Host device of two-bus communication circuit and two-bus communication circuit
TWI692210B (en) * 2019-05-15 2020-04-21 盛群半導體股份有限公司 Communication device
CN110225215B (en) * 2019-06-06 2020-12-29 四川赛科安全技术有限公司 Method for realizing signal transmission between fire-fighting telephone main unit and extension set
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CN111930105B (en) * 2020-08-19 2021-10-29 山东众海智能科技有限公司 Intelligent testing device and system for fire-fighting linkage control module
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Patentee before: Zhejiang EIT Electron Co., Ltd.