CN109592527B - Elevator state monitoring system - Google Patents
Elevator state monitoring system Download PDFInfo
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- CN109592527B CN109592527B CN201910028894.8A CN201910028894A CN109592527B CN 109592527 B CN109592527 B CN 109592527B CN 201910028894 A CN201910028894 A CN 201910028894A CN 109592527 B CN109592527 B CN 109592527B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 47
- 238000004891 communication Methods 0.000 claims description 21
- 238000012806 monitoring device Methods 0.000 claims description 19
- 238000012423 maintenance Methods 0.000 abstract description 27
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 6
- 230000003993 interaction Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 230000000737 periodic effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3415—Control system configuration and the data transmission or communication within the control system
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
Abstract
The invention discloses an elevator state monitoring system which provides rich audio and video image information inside and outside an elevator car for elevator related personnel and wins precious time for effectively eliminating elevator faults and rescuing personnel. The cameras are arranged at all places needing periodic maintenance, so that a certain supervision function can be played on the work of maintenance personnel, and the safety performance of the elevator is further improved. In the elevator installation and maintenance process, operators can improve the quality of cooperative work through a voice image interaction mode. In addition, key parts of all important parts of the elevator are monitored at any time through the camera, the elevator can be monitored remotely, problems can be found early, measures can be taken in a targeted manner, the elevator maintenance process is checked, and the elevator maintenance quality can be improved.
Description
Technical Field
The invention relates to the field of elevator monitoring, in particular to an elevator state monitoring system.
Background
Elevator cars are important load bearing components in elevators that transport goods and people. In order to ensure safe up-down movement of the car, it is necessary to fully understand the internal and external states of the car. The existing five-party intercom system can transmit information through voice, but does not work for people with language failure or language disorder. Most elevators at present are provided with cameras in the elevator car, and the cameras are transmitted to a monitoring center through a transmission cable, so that a certain foundation is established for monitoring the state of the elevator car. On the one hand, however, the elevator monitoring center is usually far away from the position of the fault elevator, or a monitoring person may not be present, so that the elevator maintenance personnel can know the state of the elevator car through the video image of the remote monitoring center very inconvenient; on the other hand, even if the maintenance personnel arrives at the failed elevator building, the maintenance personnel cannot know the floor where the elevator car stays, and usually the maintenance personnel can see up and down in the hoistway after opening the hoistway doors layer by layer so as to know the position of the elevator car in the hoistway, so that the maintenance personnel are laborious and time-consuming and have high risk. Even if the elevator arrives at the elevator room, the elevator room is not helpful to know the situation in the elevator car because the elevator room has no video image. The method brings inconvenience to the elimination of elevator faults and the rescue of trapped personnel, and even delays in life-saving treatment. In addition, when maintenance personnel are maintaining the elevator, the maintenance personnel need to know whether passengers exist in the elevator car, and because no video image information exists, if the maintenance treatment is performed blindly under the condition that the voice call is not finished, serious adverse effects are brought to the situation that the passengers exist in the elevator car. Moreover, for maintenance personnel to operate at the car roof, the cooperation personnel in the machine room have no video image information, and inconvenience is brought to cooperation work, so that the monitoring of the states inside and outside the elevator car is a very important thing.
The elevator machine room is a special space for the elevator, in which the elevator transmission part and the control part are concentrated. On the one hand, the elevator components are guaranteed to run well and normally at ordinary times, and on the other hand, regular maintenance is guaranteed. Therefore, it is a very necessary thing to monitor the working states of some key components at any time and record and check the maintenance process of maintenance personnel so as to further improve the running quality of the elevator and the working quality of the maintenance personnel.
In addition to the elevator car and the machine room, in the place where monitoring is required in the whole elevator structure, such as a hoistway, a pit, etc., if monitoring can be performed at any time, the omnibearing state of the whole elevator can be grasped, and the running quality can be further ensured.
Because the place to be monitored for the elevator can be at any possible place, in order to avoid the inconvenience caused by repeated wiring, a special bus connection mode is designed to achieve the purpose of 'the cable is only laid once and can be used for multiple times in an expanding way', which is very significant. Moreover, based on the bus, other devices conforming to the bus standard can be flexibly accessed at any time later, which is valuable for improving the performance of the elevator and facilitating the installation and maintenance of the elevator.
Because of rapid development of the building industry, a plurality of elevators are often operated in a large space at the same time, and a group control mode is often adopted to manage the elevators, even a central management machine room is shared. For the group control elevator, if one or a plurality of monitors are adopted in a centralized way to monitor the states of a machine room, a car or other positions of a plurality of elevators, the elevators do not need to run to a plurality of places respectively, and the plurality of monitors do not need to be installed respectively, so that the equipment cost is saved, and the working efficiency is improved. Therefore, the system for monitoring the group control of a plurality of elevators has very good practicability.
The technical development of the internet of things has now led to the development of the world in the direction of the internet of things, and the elevator itself and the elevator components become a part of the internet of things connection, which is a necessary development trend, so that the system has the capability of conveniently accessing the relevant data of the elevator to the internet of things, so that the state of the elevator can be conveniently known anytime and anywhere, and even the remote information interaction is performed on the mobile device, which is a necessary development trend of the future elevator.
In conclusion, the method can carry out omnibearing video monitoring on the specified relevant position of the elevator, and can realize audio bidirectional interaction; the method is applicable to single-elevator or multi-group control elevators; meanwhile, the device has the capability of conveniently accessing the monitoring equipment newly added in the future; the elevator monitoring system which can be connected to the Internet of things and can perform information interaction remotely is very necessary.
Disclosure of Invention
According to the problems existing in the prior art, the invention discloses an elevator state monitoring system, which comprises an in-machine-room monitoring device, a base station or low-rise station monitoring device, a car camera device and a signal communication line; the in-machine-room monitoring device, the base station or the low-rise station monitoring device and the car camera device are mutually and electrically connected through a signal communication circuit; the signal communication line at least comprises an audio/video bus and a control bus; the monitoring device in the machine room comprises a machine room monitor arranged in the machine room and a signal tee connector, wherein the machine room monitor is connected with an audio/video bus and a control bus through the signal tee connector; the base station or low-rise station monitoring device comprises a base station or low-rise station monitor, and the base station or low-rise station monitor is connected with an audio-video bus and a control bus through a signal three-way connector; the car camera device comprises an audio and video signal switching unit, a car top camera and an inner car camera, wherein the audio and video signal switching unit, the car top camera and the inner car camera are installed on an elevator car, the car top camera and the inner car camera are connected with an audio and video bus and a control bus through the audio and video signal switching unit and a signal tee connector, and the audio and video signal switching unit realizes signal switching through a controller of the audio and video signal switching unit.
The machine room monitor and the base station or low-station layer monitor adopt the same circuit structure, and comprise an image display, a video signal operation switch, an audio and video input interface, a control bus interface, a system power interface, a video monitor internal bus codec, an elevator number display, a controller in the video monitor, a video monitor number coding switch and a video monitor master-slave mode setting switch, wherein the image display is connected with the audio and video input interface, the video monitor internal bus codec, the elevator number display and the video signal operation switch are connected with the controller in the video monitor, the video monitor internal bus codec is connected with the control bus interface, and the video monitor controller is connected with the video monitor number coding switch and the video monitor master-slave mode setting switch.
The audio/video signal switching unit comprises a controller, wherein an audio/video signal switching unit internal bus codec is connected to the controller, the audio/video signal switching unit internal bus codec is connected with a control bus interface through a control bus, an audio/video switch is also connected to the controller, an input end of the audio/video switch is connected with an audio/video input interface, an output end of the audio/video switch is connected with an audio/video output interface through an audio/video bus, and the controller is also connected with an address coding switch and a master-slave mode setting switch.
The signal tee connector is provided with an audio-video bus interface and a control bus interface, and the audio-video bus interface and the control bus interface are respectively arranged in three paths.
When a plurality of elevators are used together, the elevators are sequentially connected by adopting an audio and video signal cascade unit, the audio and video signal cascade unit comprises a controller of the audio and video signal cascade unit, and the controller of the audio and video signal cascade unit is connected with an audio and video bus interface, a control bus interface, a bus codec in the audio and video signal cascade unit, an address coding switch of the audio and video cascade unit, a master-slave control coding switch of the audio and video cascade unit and an audio and video switch.
The top ends of the audio and video buses and the control buses are connected with a wireless communication module, a wired communication module, an antenna or a wired network end.
The components connected with the audio/video bus and the control bus communicate data with external equipment and the like which are loaded on the bus and can be expanded at any time through unified protocol standards.
By setting unique unified codes for different external devices loaded on the audio/video bus and the control bus, the device can be connected with any other independent various external devices, is not limited to an external camera and a display controller, is not limited to being additionally arranged in a machine room, a well, a pit and the like, and can be a detection component or an execution component as long as other devices meeting the requirements of a communication protocol can be added.
By adopting the technical scheme, the elevator state monitoring system provided by the invention provides rich audio and video image information inside and outside the elevator car for the relevant personnel of the elevator, and valuable time is gained for effectively eliminating elevator faults and rescuing personnel. The cameras are arranged at all places needing periodic maintenance, so that a certain supervision function can be played on the work of maintenance personnel, and the safety performance of the elevator is further improved. In the elevator installation and maintenance process, operators can improve the quality of cooperative work through a voice image interaction mode. In addition, key parts of all important parts of the elevator are monitored at any time through the camera, the elevator can be monitored remotely, problems can be found early, measures can be taken in a targeted manner, the elevator maintenance process is checked, and the elevator maintenance quality can be improved. The cable is laid once, so that the cable can be used for multiple expansion in the future, and monitoring equipment designed in the future can be directly connected, so that the function upgrading of the elevator can be realized conveniently. The elevator state can be conveniently known anytime and anywhere by adopting a remote access communication network.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
Fig. 1 is a unitary construction diagram of an elevator condition monitoring system of the present invention;
Fig. 2 is a view showing the construction of a video monitor of the elevator status monitoring system of the present invention;
fig. 3 is a schematic diagram of a one-piece signal three-way connector of the elevator condition monitoring system of the present invention;
fig. 4 is a diagram showing the configuration of a video signal switching unit of the elevator status monitoring system of the present invention;
Fig. 5 is a group control configuration diagram of the elevator condition monitoring system of the present invention.
Fig. 6 is a diagram of an audio/video signal cascade unit of the elevator status monitoring system of the present invention;
Fig. 7 is a schematic diagram of access internet of things and expansion equipment of the elevator status monitoring system of the present invention.
Fig. 8 is a schematic diagram of a video output interface for video recording of the elevator status monitoring system of the present invention.
Detailed Description
In order to make the technical scheme and advantages of the present invention more clear, the technical scheme in the embodiment of the present invention is clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention: for convenience of description of the functions, the following are defined separately by the types of the functions, and may be actually various types of combinations.
An elevator condition monitoring system is illustrated in fig. 1-8 for overall and component function. The single monitoring system comprises: an in-machine-room monitoring device, a base station or low-rise monitoring device, a car imaging device and a signal communication line. The monitoring device in the machine room comprises a machine room monitor 1 and a signal three-way connector 13 which are arranged in the machine room; the computer room monitor 1 is connected with the audio-video bus 7 and the control bus 8 through a signal three-way connector 13. A base station or lower layer station monitoring apparatus including a base station or lower layer monitor 2; the base station or lower layer monitor 2 is connected to the audio and video bus 7 and the control bus 8 by means of a signal three-way connector 13. The car camera device comprises an audio/video signal switching unit 6, a car top camera 4 and an in-car camera 5 which are arranged on an elevator car 3; the car top camera 4 and the car inner camera 5 are connected with an audio-video bus 7 and a control bus 8 through an audio-video signal switching unit 6; the audio-video signal switching unit 6 realizes signal switching by the controller 14 of the audio-video signal switching unit.
When the button 21 of the machine room monitor 1 or the base station or the lower floor monitor 2 in the machine room for switching the cameras is pressed, corresponding camera number information such as the number "1" (the number indicates that the 1 car top, the 2 car interior and the 3 car bottom) is generated, the number information enters the bus codec 91 of the audio/video signal switching unit 6 through the signal three-way connector 13 by the control bus 8, the controller 14 acquires the number "1" of the camera 4 to be checked from the bus codec 91 of the audio/video signal switching unit, thereby starting the audio/video switching switch 89-1, so that the audio/video signal of the camera with the number "1" (car top) passes through the audio/video input interface 82 in the audio/video signal switching unit 6, the audio/video switching switch 89-1 reaches the audio/video output interface 80 and then is sent to the audio/video bus 7. At this time, the room monitor 1 or the base station or the lower floor monitor 2 connected to the video bus 7 can view the video signal from the car camera 4 number "1" through the audio/video bus 7.
Group control type monitoring system: the basic composition is similar to a single monitoring system, and comprises a monitoring device in a machine room, a base station or low-rise station monitoring device, a car camera device and a signal communication line. Except that the audio video signal concatenation unit 15 is used in the group control system to replace the signal tee connector 13 in the monoblock type system. In addition, the machine room monitoring device and the base station or the low-rise monitoring device of the plurality of elevators in the group control system can be selected singly or simultaneously according to the condition of the plurality of elevators, and can be selected according to the number of the elevators or can be selected partially.
An extended monitoring system: based on a monomer type or group control system, other independent cameras are directly connected on the control bus 8 and the audio/video bus 7 by adding other audio/video signal cascade units 15 according to the needs. The flexibly added parts are not limited to the machine room camera part, the well part camera part, the pit part camera part, the car bottom camera part and the like. The unique unified coding is set for different external devices, and the audio-video signal cascading unit 15 can be connected with any other independent various external devices through the audio-video bus 7 and the control bus 8, so that the device is not limited to an external camera and a display controller, and can be a detection component or an execution component as long as other devices meeting the requirements of a communication protocol can be added.
Further, a wireless communication module 30 or a wired communication module 32 is connected to the control bus 8. The system is connected to the internet of things through the antenna 31 in a wireless or wired network 33, so that when a person is not on the site of the elevator, the state information of the elevator can be known remotely through the wired or wireless network, as shown in fig. 7.
The monitoring equipment mounted on the bus can acquire information from other equipment on the bus through the bus, can send own monitoring information to other equipment through the bus, and can perform corresponding control operation according to the information acquired from the bus. Expansion devices 41,42 as in fig. 7.
For a group control type elevator state monitoring system, when one elevator looks at a camera at a specified position of another specified elevator, an elevator number is specified by pressing an elevator selection button on the elevator, and the specified camera number on the elevator is specified by pressing the camera selection button; the elevator number and the camera number code are transmitted to each audio and video signal cascade unit 15 in the group control elevator through the control bus 8; the controller 16 of the audio/video signal cascade unit 15 controls the camera video signal switch 89-1 or 89-2 or 89-3 of the specified elevator to be turned off and on so as to transmit the video signal to the audio/video bus 7, thereby realizing that the video signal of the specified camera of the specified elevator is checked in the current elevator machine room monitor 1 or the base station or the low-rise monitor 2.
The control mode of the elevator monitoring system adopts a CAN bus or a CAN bus-like mechanism. Each machine room monitoring controller 1 or base station layer monitor 2 can set a working mode, a master-slave mode or a multi-master multi-slave mode by operating keys and a dial switch. Other equipment mounted on the bus is set to a slave mode through an address coding switch of the equipment, and a master-slave mode switch except the equipment room monitoring controller 1 or the base station layer monitor 2. By the above communication mode setting, the data transfer on the control bus 8 is ordered.
The working principle of the machine room monitor 1 or the base station or the lower-layer station monitor 2 in the machine room is as follows:
the image display 20 in the monitor is connected with the audio-video input interface 22, the controller 27 in the video monitor is connected with the in-video bus codec 25, the elevator number display 26 and the video signal operation switch 21, the in-video bus codec 25 is connected with the control bus interface 23, and the controller 27 in the video monitor is connected with the encoding switch 28 of the video monitor number and the master-slave mode setting switch 29 in the video monitor.
When it is necessary to check which elevator and which camera of the elevator, by pressing the video signal operation switch 21, the selected elevator number and the selected camera number information are generated, and the controller 27 in the video monitor outputs this information to the control bus 8 via the control bus interface 23 via the in-video-monitor bus codec 25, so that the elevator of the corresponding number can transmit the video signal of the camera of the corresponding number to the audio-video bus 7. While the elevator number information is sent to the elevator number display 26 for display. Video signals from the audio-video bus 7 are transmitted to the image display 20 via the audio-video bus interface 22 to display video signals of a specified camera of a specified elevator.
The audio/video signal switching unit 6 operates as follows:
The video switching of the audio and video signal switching unit is realized by the controller 14 in the audio and video signal switching unit 6. When the designated camera number information of the designated elevator received by the controller 14 of the audio/video signal switching unit through the bus codec 91 in the audio/video signal switching unit is consistent with the elevator number and the camera number data of the current audio/video switching unit 6, the audio/video signal switching switch 89-1 or 89-2 or 89-3 is turned on, otherwise, the elevator is turned off. The address code and master-slave mode setting of the audio-video signal switching unit 6 itself are obtained from the address code switch 92 and master-slave mode setting switch 93 by the controller 14 of the audio-video signal switching unit.
Further, the audio/video signal cascade unit 15 operates as follows:
The audio/video signal cascade unit 15 is provided with a controller 16 of the audio/video signal cascade unit. The controller 16 of the audio/video signal cascade unit receives the elevator number information and the camera number information on the control bus 8, and when the received data is judged to be consistent with the current elevator number, the audio/video switch 9 is turned on, otherwise, the audio/video switch is turned off.
As shown in fig. 6: the interfaces 61, 62 are connected to the room monitor. Interfaces 65, 66 are connected to the base station or lower station monitor and interfaces 63, 64 are connected to the pre-audio video bus 7 and the control bus 8. The interfaces 69, 70 are connected to the post-audio-video bus 7 and the control bus 8. The power supply of the control circuit is connected to the power interface 71. The controller 16 of the audio video signal concatenation unit is connected to a control bus 78 in the audio video signal concatenation unit 15 via a bus codec 72 in the audio video signal concatenation unit. The controller 16 of the audio video signal cascade unit 15 is connected to the address coding switch 73 of the audio video signal cascade unit 15 and to the master-slave mode switch 74 of the audio video signal cascade unit 15. The controller 16 of the audio-video signal cascade unit 15 obtains the address code of the current audio-video signal cascade unit 15 through the setting value of the address code switch 73 of the audio-video signal cascade unit 15; the controller 16 of the audio/video signal cascade unit 15 obtains the setting state of the current audio/video signal cascade unit 15 being the master or slave through the setting value of the master-slave control switch 74 of the audio/video signal cascade unit 15. The setting values of the address coding switch 73 and the master-slave switch 74 of the audio/video signal cascade unit 15 may be data set by a physical switch or data set in an erasable memory unit of the controller. The controller 16 of the audio-video signal cascade unit 15 is connected to a control terminal of the audio-video switch 79, and is used for controlling on or off of the audio-video switch 79. An audio/video bus 77 in the audio/video signal cascade unit 15 connects the video bus interface 61,63,65,69 in the audio/video signal cascade unit 15 and connects with the output end of the audio/video switch 79. The control bus 78 in the audio/video signal cascade unit 15 connects the control bus interface 62,64,66,68,70 in the audio/video signal cascade unit 15, and connects the control bus interface 62,64,66,68,70 with the controller 16 of the audio/video signal cascade unit 15 through the bus codec 72. In addition, the audio/video signal cascade unit 15 is provided with a video output interface 18 for recording the direct video signal, as shown in fig. 8.
The av interface 63 is used for accessing the av signal from the previous av signal cascade unit 15 and providing the av signal input to the next av signal cascade unit 15 through the av interface 69. The audio/video interface 61 and the control bus interface 62 are used for providing an audio/video signal path and a control path for the room monitor 1. The audio/video interface 65 and the control bus interface 66 are used to provide an audio/video signal path and a control path to the base station or the lower-layer station monitor 2. An audio/video interface 67 and a control bus interface 68 for providing an externally input audio/video signal path and a control path for operating with external communication. A system power interface 71 for externally introducing system power. When a plurality of audio/video signal cascade units 15 are connected in series, one externally introduced power source can be intensively used, and the power supply of the remaining audio/video signal cascade units 15 can be introduced through the power source line contained in the control bus 8 or the audio/video bus 7. The audio-video bus 7 and the audio-video bus 77 carry audio and video information streams. The control bus 8 and the control bus 78 communicate control commands or data for system operation. The address coded data transferred by the audio and video signal cascade unit 15 on the control bus 78 is decoded by the bus codec 72 in the audio and video signal cascade unit, when the decoded address coded data is the same as the address code of the current audio and video signal cascade unit 15, the audio and video switch 79 is turned on by the controller 16 of the audio and video signal cascade unit 15, the transfer of the audio and video signals is completed, and otherwise, the audio and video signals are turned off.
The address code data of the audio/video signal cascade unit 15 may be input from the address code switch 73, or may be written into the memory chip in advance. The master-slave control mode of the audio/video signal cascade unit 15 may be input from the master-slave mode switch 74, or may be realized by pre-programming master-slave mode data into the memory chip. The audio/video signal cascade unit 15 mounted on the control bus 8 can be used as a master, a slave or even a master-slave unit, and the working mode of the audio/video signal cascade unit can be set through the video switch switches 21-1, 21-2, 21-3 and the internal address dial switches 28, 29 of the operation of the machine room monitor 1 or the base station monitor 2.
The audio/video bus 7 and the control bus 8 which connect the components of the system, or the audio/video bus 77 and the control bus 78 in the audio/video signal cascade unit 15, may be a single wire, may be a plurality of wires, may be coaxial cables, may be optical fibers, etc., and may also include a power line, where the power line in the bus may provide electric energy for a bus type device mounted on the bus.
The bus control mode is not limited, and various types of bus control modes, such as a CAN bus, an I2C bus and the like, CAN be selected.
Examples: the group control elevator can monitor a plurality of 1,2 and above elevators, and 3 elevators such as 1#,2#,3# are listed here for the convenience of description.
The car top camera information of the 3# elevator is to be checked in the 1# elevator machine room. First, the elevator selection button on the machine room monitor 1 of the 1# elevator is pressed to generate the number information "3" of the 3# elevator to be selected, and the camera selection button on the machine room monitor 1 is pressed to generate the camera number information "2" of the 3# elevator to be selected (the number description is 1 car roof, 2 car interior, 3 car bottom). Information about the elevator number "3" and the camera number "2" (in-car) to be checked is sent to the control bus 8 so that all elevators in the group control can obtain this information from the control bus 8.
When the 3# elevator receives the information transmitted on the control bus 8, the information of the elevator number '3' of the current control bus (8) is judged to be the number of the elevator. Subsequently, the controller 16 in the audio/video signal cascade unit 15 of the 3# elevator controls the video switch 79 to open the video path to the car so that the video signal of the car of the 3# elevator can be transmitted to the audio/video bus 7.
When the 3# elevator judges that the information of the camera number '2' on the current control bus 8 is the camera number '2' of the number elevator (in the car) according to the information of the camera number which is received and spread on the control bus 8. Subsequently, the controller 14 on the audio/video switching control unit 6 of the 3# elevator controls the video switch 89-2 to open a video channel leading to the camera 5 in the car, so that video signals of the number '2' camera 5 of the 3# elevator car can be transmitted to the audio/video bus 7 through the audio/video switching control unit 6, the audio/video signal cascading unit 15. To this end, the video signal of the number "2" camera 5 of the car of elevator number 3# arrives on the audio-video bus 7.
At the same time, the audio/video signal concatenation unit 15 of the other non-selected 1# elevator and 2# elevator also acquires the information of the selected elevator number "3" and the camera number "2" on the control bus 8, but since the corresponding 1# elevator and 2# elevator are not turned on. Therefore, the connection switch 79 of the audio/video signal of the corresponding elevator and the audio/video bus 7 is turned off by the controller 16 in the respective audio/video signal cascade unit 15. Ensuring that only the video signal of the 3# elevator can be separately transmitted to the audio/video bus 7.
The machine room monitor 1 of the elevator # 1 can see the video signal of the camera (in the car) numbered "2" of the elevator # 3, which is currently designated as the elevator numbered "3", through the video information transmitted on the audio/video bus 7. Meanwhile, the base station or the lower floor monitor 2 of the elevator # 1 can also observe the same information as the machine room monitor 1 through the audio/video bus 7, and the elevator number display 26 in the machine room monitor 1 or the base station monitor 2 indicates from which number the current video image is coming. Since the two are all sharing one audio/video bus, the same information can be observed by the machine room monitor 1 and the base station or lower floor monitor 2 of the other elevator # 2 and the elevator # 3. Similarly, the base station or the lower-level monitor 2 of the elevator # 1 operates exactly as the machine room monitor 1. To a broad extent, both the elevator # 2 and the elevator # 3 can be operated similarly to the elevator # 1, thereby realizing video information of the specified camera of the specified number elevator to be observed. There may be a case where there are a plurality of different room monitors 1 or the base station or lower layer monitor 2 key is pressed at the same time, and there is a conflict. The two cases are: a) For the simultaneous operation of a plurality of switches, the time sequence of pressing the operation keys is operated in sequence, and the audio and video signals selected by the last key are always reserved on the audio and video bus 7; b) If the operation is completely strict and the key is operated, the result of selecting the key with the highest level on the audio/video bus 7 is always selected, or the condition of the simultaneous operation is set to be unchanged without any processing.
The invention discloses an elevator state monitoring system, which has the following purposes: 1) When the elevator car fails, before maintenance personnel enter the elevator, the position of the car in the well and video image information of the inside and the outside of the car can be known only by a monitor of a base station or a low-rise station, so that effective countermeasures can be taken at the first time. 2) The position of the elevator car in the hoistway and the video image information of the inside and the outside of the elevator car can be known by the monitor of the machine room, so that the elevator can be operated for processing while being observed more effectively. 3) The working condition of the specified elevator component of the whole machine room and the operation process of maintenance personnel in the machine room can be monitored, so that the elevator can be operated more safely and well maintained. 4) For a plurality of elevators, the monitor of one elevator can monitor the working state of the other elevator, so that the group control type monitoring operation is realized, and the monitor of one elevator can efficiently know the working state of the other elevators. 5) Besides monitoring images, the two-way communication of voice can be realized, so that the situation of people in the elevator car can be conveniently known, and the information communication of elevator installation and maintenance personnel during cooperation and matching is also convenient. 6) All the transmitted image and voice data can be accessed to the Internet of things through a wired or wireless network, so that image monitoring and voice intercom of both parties can be remotely realized through a PC or a handheld mobile device. 7) All the image and voice information and control data are transmitted through the audio and video buses and the control buses, so that various corresponding bus devices can be conveniently mounted, construction wiring and later maintenance are facilitated, and even other expansion devices are additionally mounted in the future. 8) All the monitoring data are stored in a digital video recorder in a unified way for circular storage, so that the monitoring data are convenient to be called and watched at any time.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. An elevator condition monitoring system characterized by: the system comprises a monitoring device in a machine room, a base station or low-rise station monitoring device, a car camera device and a signal communication line; the monitoring device in the machine room, the base station or the low-rise station monitoring device and the car camera device are mutually and electrically connected through a signal communication circuit; the signal communication line at least comprises an audio/video bus (7) and a control bus (8); the monitoring device in the machine room comprises a machine room monitor (1) arranged in the machine room, and a signal three-way connector (13), wherein the machine room monitor (1) is connected with an audio/video bus (7) and a control bus (8) through the signal three-way connector (13); the base station or low-rise station monitoring device comprises a base station or low-rise station monitor (2), and the base station or low-rise station monitor (2) is connected with an audio-video bus (7) and a control bus (8) through a signal three-way connector (13); the car camera device comprises an audio and video signal switching unit (6), a car top camera (4) and an in-car camera (5) which are arranged on the elevator car (3), wherein the car top camera (4) and the in-car camera (5) are connected with an audio and video bus (7) and a control bus (8) through the audio and video signal switching unit (6) and a signal three-way connector (13), and the audio and video signal switching unit (6) realizes signal switching through a controller (14) of the audio and video signal switching unit;
The machine room monitor (1) and the base station or the lower-layer station monitor (2) adopt the same circuit structure, and comprise an image display (20), a video signal operation switch (21), an audio and video input interface (22), a control bus interface (23), a system power interface (24), a video monitor internal bus codec (25), an elevator number display (26), a controller (27) in the video monitor, a video monitor number coding switch (28) and a video monitor master-slave mode setting switch (29), wherein the image display (20) is connected with the audio and video input interface (22), the video monitor internal bus codec (25), the elevator number display (26) and the video signal operation switch (21) are connected to the controller (27) in the video monitor, the video monitor internal bus codec (25) is connected with the control bus interface (23), and the video monitor controller (27) is connected with the video monitor number coding switch (28) and the video monitor master-slave mode setting switch (29);
The audio/video signal switching unit (6) comprises a controller (14), wherein the controller (14) is connected with an audio/video signal switching unit internal bus codec (91), the audio/video signal switching unit internal bus codec (91) is connected with a control bus interface (81) through a control bus (88), the controller (14) is also connected with audio/video switching switches (89-1, 89-2 and 89-3), the input ends of the audio/video switching switches (89-1, 89-2 and 89-3) are connected with an audio/video input interface (82) and the output ends thereof are connected with an audio/video output interface (80) through an audio/video bus (87), and the controller (14) is also connected with an address coding switch (92) and a master-slave mode setting switch (93);
the working principle of the machine room monitor (1) or the base station or the lower-layer station monitor (2) in the machine room is as follows:
An image display (20) in the monitor is connected with an audio and video input interface (22), a controller (27) in the video monitor is connected with a bus codec (25) in the video monitor, an elevator number display (26) and a video signal operation switch (21), the bus codec (25) in the video monitor is connected with a control bus interface (23), and the controller (27) in the video monitor is connected with a coding switch (28) of the video monitor number and a master-slave mode setting switch (29) in the video monitor.
2. An elevator condition monitoring system as defined in claim 1, further characterized by: an audio-video bus interface (01) and a control bus interface (02) are arranged on the signal tee connector (13), and the audio-video bus interface (01) and the control bus interface (02) are respectively arranged in three paths.
3. An elevator condition monitoring system as defined in claim 1, further characterized by: when a plurality of elevators are used together, the elevators are sequentially connected by adopting an audio and video signal cascade unit (15), the audio and video signal cascade unit (15) comprises a controller (16) of the audio and video signal cascade unit, and an audio and video bus interface (61), a control bus interface (62), a bus codec (72) in the audio and video signal cascade unit, an address coding switch (73) of the audio and video cascade unit, a master-slave control coding switch (74) of the audio and video cascade unit and an audio and video switch (79) are connected to the controller (16) of the audio and video signal cascade unit.
4. An elevator condition monitoring system according to claim 3, further characterized by: the top ends of the audio and video buses (7) and the control buses (8) are connected with a wireless communication module (30), a wired communication module (32), an antenna (31) or a wired network end (33).
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