KR101575257B1 - Apparatus and method for deciding connection status between devices of vehicle - Google Patents

Abstract

Proposed are a device and method to determine a connection state between vehicle devices, which determines a connection state between a vehicle sensor and a controller among a normal state, a disconnection state, and a short circuit state. The device to determine a connection state between vehicle devices according to the present invention comprises: a sensor which obtains outside environmental information of a vehicle and information of objects located outside the vehicle; a controller which controls the driving of the vehicle based on the environmental information and object information; and a connection state determining part which finally determines the connection state between the sensor and the controller among a normal state, a disconnection state, and a short circuit state, determines whether the connection state is the normal state or not, and determines whether the connection state is either the disconnection state or the short circuit state if the connection state is not the normal state.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a device and a method for determining a connection state between vehicle devices,

The present invention relates to an apparatus and method for determining a connection state between vehicle devices. More particularly, the present invention relates to an apparatus and method for determining a connection state between a sensor mounted on a vehicle and a controller.

The vehicle control system detects the behavior information of the vehicle on the basis of the sensing information obtained by using the sensor, and electronically controls the running of the vehicle based on the behavior information. Therefore, in the past, it has been necessary to frequently check whether or not the vehicle sensor operates normally.

However, the conventional sensor checking apparatus was able to check whether or not it was disconnected, but it was difficult to check whether there was a short circuit. In the event of a short circuit of the sensor, not only the sensor but also the electric parts around the sensor may be damaged by the overcurrent. Therefore, there is a need for a more effective and fundamental measure against such a short circuit.

Korean Patent Laid-Open Publication No. 2009-0060799 proposes a method of detecting disconnection of a sensor mounted on a vehicle. However, this method can detect only the disconnection of the sensor but not the short circuit of the sensor. Therefore, this method can not solve the above-described problem.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide an apparatus and method for determining a connection state between vehicle devices that determine whether a connection state between a vehicle sensor and a controller is a normal state, It is aimed to propose.

However, the objects of the present invention are not limited to those mentioned above, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

SUMMARY OF THE INVENTION The present invention has been made in order to achieve the above-mentioned object, and it is an object of the present invention to provide an information processing apparatus, A controller for controlling the running of the vehicle based on the environment information and the object information; And determining whether a connection state between the sensor and the controller is one of a normal state, a disconnection state, and a short-circuit state, and first determining whether the connection state is the normal state, And a connection state determiner for determining whether the connection state is one of the disconnection state and the short-circuit state, if the connection state is not the first connection state.

Preferably, the connection state determination unit includes an electrical switch connected in series to the sensor and the controller, and controls ON / OFF of the electrical switch to change the connection state between the disconnection state and the short circuit State is determined to be one of the states.

Preferably, the connection state determiner may include a first resistor having a pull-up function, a second resistor connected in parallel to the first resistor and serially connected to the sensor and the controller, The connection state is determined as one of the disconnection state and the short-circuit state based on a voltage measured between the second resistor and the third resistor connected in series to the electrical switch.

Preferably, the connection state determination unit determines that the disconnected state is a state in which the output of the sensor is disconnected, and determines that the shorted state is a state in which the power supply is short-circuited.

Preferably, the connection state determination unit uses a transistor as the electrical switch.

Preferably, the connection state determination unit includes an electrical switch connected in series to the sensor and the controller, wherein the connection state determining unit determines whether the connection state is the normal state when the electrical switch is in an off state, State and determines that the connection state is one of the disconnection state and the short-circuit state.

Preferably, the connection state determination unit changes the electrical switch to an off state again to check the connection state determination result.

Preferably, the apparatus further comprises a connector positioned between the sensor and the connection state determination unit and connected in series to the sensor and the connection state determination unit, It is determined whether or not the connection state is the steady state according to a voltage measured when the electrical switch is in an off state and whether or not the connector is short-circuited to ground.

Preferably, the connection state determination unit includes an electrical switch connected in series to the sensor and the controller, and turns off the electrical switch when the connection state is determined to be the short-circuited state.

Further, the present invention finally determines whether the connection state between the sensor and the controller is one of a normal state, a disconnection state, and a short-circuit state, and first determines whether the connection state is the normal state, Determining whether the connection state is one of the disconnection state and the short-circuit state if the state is not the state; If the connection state is the steady state, the sensor acquires environment information outside the vehicle and object information located outside the vehicle; And controlling the driving of the vehicle based on the environment information and the object information.

Preferably, the determining step may include controlling ON / OFF of the sensor and an electric switch serially connected to the controller to switch the connection state to one of the disconnection state and the short-circuit state .

Advantageously, the determining step comprises a first resistor having a pull-up function, a second resistor connected in parallel to the first resistor and serially connected to the sensor and the controller, The connection state is determined as one of the disconnection state and the short-circuit state based on a voltage measured between the second resistor and the third resistor connected in series to the electrical switch.

Preferably, the determining step determines that the disconnection state is a state in which the output of the sensor is disconnected, and determines that the short-circuit state is a state in which the power supply is short-circuited.

Advantageously, the determining comprises using a transistor with the electrical switch.

Preferably, the determining step may include determining whether the connection state is the normal state when the sensor and the electrical switch serially connected to the controller are off, changing the electrical switch to the on state, Is determined as one of the disconnection state and the short-circuit state.

Preferably, the determining step changes the electrical switch to the off state again to check the determination result of the connection state.

Advantageously, said determining step comprises the step of determining whether the connection state is in the steady state, depending on the voltage measured when the electrical switch is in the off state, with the sensor being located between the sensor and the electrical switch, It is determined whether or not the series-connected connector is short-circuited to ground.

Preferably, the determining step turns off the electrical switch serially connected to the sensor and the controller if the connection state is determined to be the short-circuit state.

According to the present invention, the following effect can be obtained by determining the connection state between the vehicle sensor and the controller as one of a normal state, a disconnection state, and a short-circuit state.

First, it is possible to determine not only the disconnection state but also the short circuit state, especially the external power short circuit and the ground short circuit, thereby preventing the damage due to the overcurrent such as the damage of the sensor and the controller.

Second, by using an electrical switch, it is possible to block noise and current flow due to high voltage.

Third, it is possible to prevent fault diagnosis errors due to instantaneous noise by judging the connection state in the on / off state of the electrical switch.

1 is a schematic diagram of an apparatus for determining the state of connection between vehicle devices according to a preferred embodiment of the present invention.
2 is a detailed view of an apparatus for determining the state of connection between vehicle devices according to a preferred embodiment of the present invention.
3 is a flowchart illustrating a method of determining a connection state between vehicle devices according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

1 is a schematic diagram of an apparatus for determining the state of connection between vehicle devices according to a preferred embodiment of the present invention. 2 is a detailed view of an apparatus for determining the state of connection between vehicle devices according to a preferred embodiment of the present invention. Particularly, FIG. 2 is a detailed view of an internal configuration of a connection state determination unit that constitutes a connection state determination apparatus between vehicle devices.

The present invention relates to a circuit for confirming a connection state between a sensor (110) and a controller (120) operating using the output of the sensor (110).

The output of the sensor 110 is disconnected or the external power is shorted to the connector 210 of the controller 120 connected to the output of the sensor 110, And the controller 120 can be confirmed.

When the external power is short-circuited to the connector 210 of the controller 120 connected to the sensor output by using the electric switch 270, the electric switch 270 is transmitted to the controller 120 using the electric switch 270 It is possible to prevent the inflow of noise to prevent damage to the controller 120 and other external devices.

Generally, the sensor connection status check circuits can check the status of disconnection, but it is difficult to check the status of short circuit of external power source. The connection of the sensor can be a normal connection status and disconnection status, as well as a connection status such as an external power short or ground short, and it is only necessary to configure the circuit to check all of these matters before the fault diagnosis of the controller have.

The circuit of the present invention can confirm all states such as an external power short circuit, a sensor output disconnection, a steady state, and an external ground short circuit by using a resistor and a transistor in order to grasp the sensor connection state.

Also, according to the present invention, the connection state of the sensor 110 can be confirmed by using the transistor as the electric switch 270, thereby making it possible to prevent a fault diagnosis error due to instantaneous noise through the second check. An example of this is as follows.

(1) Check the connection state between the sensor 110 and the controller 120 when the electrical switch 270 is off. In this case, if it is determined that the connection state between the sensor 110 and the controller 120 is in an abnormal state, the electric switch 270 is turned on to check whether the abnormal state is due to instantaneous noise, .

(2) When the electric switch 270 is turned on, the connection state between the sensor 110 and the controller 120 is checked again. In this case, if it is determined that the connection state between the sensor 110 and the controller 120 is a disconnection state or a short circuit state, the determination result is determined, and it is determined that there is no problem in the connection state between the sensor 110 and the controller 120 The electric switch 270 is turned off.

(3) When the electrical switch 270 is changed to the off state, the connection state between the sensor 110 and the controller 120 is checked again. In this case, if it is determined that there is no problem in the connection state between the sensor 110 and the controller 120, it is determined that the abnormal state in (1) is due to the instantaneous noise.

In addition, the present invention can block noise and current flow due to a high voltage by using the electric switch 270 when a problem such as an external power short occurs.

This will be described below with reference to FIGS. 1 and 2. FIG.

The apparatus 100 for determining a connection state between vehicle devices includes a sensor 110, a controller 120, a connection state determination unit 130, a power supply unit 140, and a main control unit 150. The apparatus 100 for determining the state of connection between vehicle devices may further include a notifier 160.

The power supply unit 140 performs a function of supplying power to each configuration of the vehicle-device connection state determination apparatus 100. [ The main control unit 150 performs a function of controlling the overall operation of each configuration of the device status determining apparatus 100 between vehicles. In the present embodiment, the power supply unit 140 and the main control unit 150 may not be provided when it is considered that the connection state determining apparatus 100 between vehicle devices can be controlled by a vehicle ECU.

The sensor 110 performs a function of acquiring environment information outside the vehicle and object information located outside the vehicle. The environmental information includes lane information and the like. The object information includes the speed and position of another vehicle, the position of the obstacle, and the like.

The controller 120 controls the running of the vehicle on the basis of the environment information and the object information acquired by the sensor 110. The controller 120 can control the running of the vehicle, for example, by inputting a turn signal lamp for changing lanes.

The connection state determination unit 130 finally determines the connection state between the sensor 110 and the controller 120 to be one of a normal state, a disconnection state, and a short-circuit state. More specifically, the connection state determination unit 130 first determines whether the connection state between the sensor 110 and the controller 120 is in a normal state, and determines whether the connection state between the sensor 110 and the controller 120 is normal It is determined whether the connection state between the sensor 110 and the controller 120 is one of a disconnection state and a short-circuit state.

Referring to FIG. 2, the sensor 110 of the 5V level normally maintains the output of the steady state at 10% to 90% of the 5V level in order to check the failure state. In other levels, it is recognized as a failure. That is, when 0.5 V to 4.5 V is measured by the CPU 260, the connection state between the sensor 110 and the controller 120 is determined as a normal state.

When the GND level (0 V) is measured by the CPU 260 when the electrical switch 270 is in the off state (T1 OFF), the connection state between the sensor 110 and the controller 120 is judged as a ground short circuit. However, when the external power supply is short-circuited (that is, when the battery 12V connected to the connector 210 is short-circuited), 5V is measured by the clamping diode D1 250, and similarly, 5V is measured due to R1 (220). That is, in this case, there is a problem that it is difficult to distinguish the short circuit of the external power supply and the disconnection of the sensor.

Therefore, in the present embodiment, the electrical switch 270 is changed from the off state to the on state to judge whether the external power supply is short-circuited and the sensor is disconnected. If the external power supply is shorted, the level can be recognized through the voltage division of R2 (230) and R3 (240). When the sensor is disconnected, the voltage distribution of R1 (220), R2 (230) Level can be recognized through. That is, since the value of the voltage is different, the external power short circuit and the sensor short circuit can be distinguished based on this.

In consideration of the above, the connection state determination unit 130 may be configured as follows.

The connection state determination unit 130 may include an electrical switch 270 connected in series to the sensor 110 and the controller 120. In this embodiment, the electrical switch may be implemented as a transistor. In this case, the connection state determination unit 130 controls the ON / OFF state of the electrical switch 270 so that the connection state between the sensor 110 and the controller 120 is either a disconnection state or a short- As shown in FIG.

The connection state determination unit 130 determines the connection state of the sensor 110 and the controller 120 based on the voltages measured at the first resistor R1 220, the second resistor R2 230, Can be judged as a state of either the disconnection state or the short-circuit state.

At this time, the connection state determination unit 130 determines that the disconnection state is the disconnected state of the output of the sensor 110, and determines that the short-circuit state is a state where the power supply is short-circuited. The power source means a power source input through one side of the line connecting the sensor 110 and the connection state determination unit 130. For example, the power source input through the connector 210 corresponds to the power source.

Meanwhile, the first resistor 220 has a pull-up function. The second resistor 230 is connected in parallel to the first resistor 220 and is serially connected to the sensor 110 and the controller 120. And the third resistor 240 is located between the second resistor 230 and the electrical switch 270 and is connected in series to the second resistor 230 and the electrical switch 270.

The connection state determination unit 130 determines whether the connection state between the sensor 110 and the controller 120 is in the normal state when the electrical switch 270 is in the off state and changes the electrical switch 270 to the on state So that the connection state between the sensor 110 and the controller 120 can be determined as one of the disconnection state and the short-circuit state.

In this case, the connection state determination unit 130 may check the connection state between the sensor 110 and the controller 120 by changing the electrical switch 270 to the off state again. Hereinafter, this will be described in more detail.

Referring to FIG. 2, when the connection state between the sensor 110 and the controller 120 is in a steady state while the T1 270 is OFF, if the CPU 260 recognizes the 5V level due to an instant noise, Enter the fault state. In this case, it is possible to discriminate by checking twice by changing ON / OFF of T1 whether it is a physical problem such as a short circuit or a disconnection or an instantaneous noise problem.

ex. When T1 is OFF, it is recognized as 5V → Check after T1 ON → Check normal level → Check after T1 OFF → Check normal level

= Check with momentary noise.

Meanwhile, the connection state determination apparatus 100 between vehicle devices may further include a connector 210.

The connector 210 is located between the sensor 110 and the connection state determination unit 130 and is connected in series to the sensor 110 and the connection state determination unit 130.

In this case, the connection state determination unit 130 determines whether the connection state between the sensor 110 and the controller 120 is in a normal state or not according to the voltage measured when the electrical switch 270 is in the off state, It is possible to judge whether or not the ground is short-circuited.

The connection state determination unit 130 may turn off the electrical switch 270 when the connection state between the sensor 110 and the controller 120 is determined to be short-circuited.

Meanwhile, the connection state determination apparatus 100 between vehicle devices may further include a notifying unit 160.

When the connection state between the sensor 110 and the controller 120 is abnormal, the notifying unit 160 notifies the server or the terminal provided in the maintenance company of the vehicle or the terminal held by the driver of the vehicle, .

The present invention described with reference to FIGS. 1 and 2 relates to a circuit for confirming a connection state of analog sensors including a pressure sensor, a temperature sensor, and the like. The present invention also relates to a connection state checking circuit for isolating noise and current flow due to a voltage that is turned off after an electrical switch is turned off after a problem such as an external power supply shortage is detected by checking a connection state using a transistor as an electrical switch.

Hereinafter, an operation method of the apparatus 100 for determining the state of connection between vehicle equipments described with reference to FIGS. 1 and 2 will be described.

3 is a flowchart illustrating a method of determining a connection state between vehicle devices according to a preferred embodiment of the present invention. The following description refers to Fig. 1 to Fig.

First, the connection state determination unit 130 determines whether the connection state between the sensor 110 and the controller 120 is in a normal state (S310).

If it is determined that the connection state between the sensor 110 and the controller 120 is in a normal state, the sensor 110 acquires environmental information outside the vehicle and object information located outside the vehicle at step S320.

Thereafter, the controller 120 controls driving of the vehicle on the basis of environmental information outside the vehicle and object information located outside the vehicle (S330).

If it is determined that the connection state between the sensor 110 and the controller 120 is abnormal, the connection state determination unit 130 determines whether the connection state between the sensor 110 and the controller 120 is a disconnection state or a short- It is determined to be in one of the states (S340).

If it is determined that the connection state between the sensor 110 and the controller 120 is short-circuited, the connection state determination unit 130 turns off the electrical switch 270 to shut off the flow of the current flowing into the controller 120 (S350).

It is to be understood that the present invention is not limited to these embodiments, and all elements constituting the embodiment of the present invention described above are described as being combined or operated in one operation. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. In addition, although all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware. As shown in FIG. In addition, such a computer program may be stored in a computer readable medium such as a USB memory, a CD disk, a flash memory, etc., and read and executed by a computer to implement an embodiment of the present invention. As the recording medium of the computer program, a magnetic recording medium, an optical recording medium, a carrier wave medium, and the like can be included.

Furthermore, all terms including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined in the Detailed Description. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (11)

A sensor for acquiring environment information outside the vehicle and object information located outside the vehicle;
A controller for controlling the running of the vehicle based on the environment information and the object information; And
The connection state between the sensor and the controller is determined to be one of a normal state, a disconnection state, and a short-circuit state, and it is first determined whether the connection state is the normal state, Or an electrical switch connected in series to the sensor and the controller to determine whether the connection state is one of the disconnection state and the short-circuit state, wherein when the electrical switch is in the OFF state, Determining whether the connection state is one of the disconnection state and the short-circuit state by changing the electrical switch to the on state, determining whether the connection state is the normal state,
And determining the connection state between the vehicle devices. delete The method according to claim 1,
Wherein the connection state determination unit includes a first resistor having a pull-up function, a second resistor connected in parallel to the first resistor and serially connected to the sensor and the controller, and a second resistor connected between the second resistor and the electrical switch, And determines that the connection state is one of the disconnection state and the short-circuit state based on the voltage measured at each of the second resistor and the third resistor serially connected to the electrical switch. Connection state determination device. The method of claim 3,
Wherein the connection state determination unit determines that the disconnected state is a state in which the output of the sensor is disconnected, and determines that the shorted state is a state in which the power supply is short-circuited. The method according to claim 1,
Wherein the connection state determination unit uses a transistor as the electrical switch. delete The method according to claim 1,
Wherein the connection state determination unit changes the electrical switch to an off state to check a result of the determination of the connection state. The method according to claim 1,
And a connection state determination unit that is located between the sensor and the connection state determination unit and that is serially connected to the sensor and the connection state determination unit,
Further comprising:
Wherein the connection state determination unit determines whether or not the connection state is the steady state and whether or not the connector is short-circuited to ground according to a voltage measured when the electrical switch is in the off state. . The method according to claim 1,
Wherein the connection state determiner turns off the electrical switch when the connection state is determined to be the short-circuit state. The controller determines whether a connection state between the sensor and the controller is a normal state, a disconnection state, and a short-circuit state, and determines whether the connection state is the normal state. If the connection state is not the normal state, Determining a connection state as one of the disconnection state and the short-circuit state;
If the connection state is the steady state, the sensor acquires environment information outside the vehicle and object information located outside the vehicle; And
Controlling the driving of the vehicle based on the environment information and the object information
/ RTI >
Wherein the determining step determines whether the connection state is the normal state when the electrical switch is in the off state using the sensor and the electrical switch serially connected to the controller, And determining that the connection state is one of the disconnection state and the short-circuit state. 11. The method of claim 10,
Wherein the determining step determines that the connection state is the short-circuit state, and turns off the electrical switch when the connection state is determined to be the short-circuit state.

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