CN214565283U - Trailer anti-lock braking system's connection status detection device - Google Patents
Trailer anti-lock braking system's connection status detection device Download PDFInfo
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- CN214565283U CN214565283U CN202120590237.5U CN202120590237U CN214565283U CN 214565283 U CN214565283 U CN 214565283U CN 202120590237 U CN202120590237 U CN 202120590237U CN 214565283 U CN214565283 U CN 214565283U
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Abstract
The embodiment of the utility model discloses trailer anti-lock braking system's connection status detection device, the device includes: the current detection circuit and the processing module; the current detection circuit is connected with the processing module and the power input end of the trailer anti-lock brake system and is used for detecting an input current signal of the trailer anti-lock brake system; and the processing module is used for receiving the input current signal transmitted through the chip interface so as to realize the detection of the connection state of the trailer anti-lock brake system through the input current signal. The current detection circuit is used for detecting the input current signal of the anti-lock braking system of the trailer and detecting the input current signal in real time, so that the implementation process is simple and convenient, and the cost is low; the method avoids inaccurate detection results caused by damage of the device or other reasons when the detection is carried out according to the working current of the device on the vehicle, and has higher detection accuracy rate on the connection state of the anti-lock brake system of the trailer from the power input source of the anti-lock brake system of the trailer.
Description
Technical Field
The embodiment of the utility model provides a vehicle inspection technical field especially relates to a trailer anti-lock braking system's connection status detection device.
Background
With the improvement of living standard, automobiles go deeper into the lives of people more and more. The rapid development and popularity of the variety and quantity of automobiles provides great convenience to people's lives, such as the application of commercial vehicles. In the field of commercial vehicles, an Anti-lock Braking System (ABS) of a trailer of a tractor plays a critical role in the driving safety of the entire vehicle. Different brake control strategies may be employed by the trailer anti-lock braking system in connection with the host vehicle. Therefore, the method is particularly important for detecting the connection state of the ABS system of the trailer.
At present, the detection of the connection state of the anti-lock brake system of the trailer by the domestic tractor is mainly realized by a Body Control Module (BCM). At the moment of electrifying the anti-lock brake system of the trailer for self-checking, the fault indicator light line of the anti-lock brake system jumps at high and low levels, and the BCM confirms whether the anti-lock brake system of the trailer is connected or not by detecting the jumping edge of the change of the high and low levels. However, if the detection window period is missed due to special use conditions during the use process of the user, the BCM has a risk of misjudgment. For example, when a user unplugs the ABS spiral line of the trailer without power failure of the vehicle, the BCM cannot judge whether the anti-lock braking system of the trailer is disconnected, which causes inaccuracy or inappropriateness of the braking control strategy selected by the host vehicle, which may cause a certain risk to the braking of the vehicle, may cause a certain damage to the vehicle, and may bring a danger to the safety of the driver and the passenger on the vehicle.
SUMMERY OF THE UTILITY MODEL
The utility model provides a trailer anti-lock braking system's connection state detection device to improve the accuracy that detects trailer anti-lock braking system's connection state.
An embodiment of the utility model provides a trailer anti-lock braking system's connection status detection device, the device includes: the current detection circuit and the processing module;
the current detection circuit is connected with the processing module and the power input end of the trailer anti-lock brake system and is used for detecting an input current signal of the trailer anti-lock brake system;
and the processing module is used for receiving the input current signal transmitted through the chip interface so as to realize the connection state detection of the trailer anti-lock brake system through the input current signal.
Further, the apparatus further comprises: a power input interface and a power output interface;
the power input interface is connected with a power supply;
and the power output interface is connected with the trailer anti-lock brake system.
Further, the power output interface is connected with the trailer anti-lock brake system through a trailer anti-lock spiral line.
Further, the trailer anti-lock spiral line at least comprises a first power line and a second power line;
and the power output interface supplies power to the trailer anti-lock brake system through a first power supply and a second power supply line in the trailer anti-lock spiral line.
Further, the current detection circuit is connected with the power output interface so as to realize connection with a power input end of the trailer anti-lock brake system.
Further, the processing module is connected with the power output interface and used for controlling power supply of the trailer anti-lock brake system.
Further, the apparatus further comprises: a controller area network communication module;
the controller area network communication module is connected with the processing module and the vehicle control unit area network, and is used for converting the received connection state into a connection state signal and sending the connection state signal to the vehicle control unit area network.
An embodiment of the utility model provides a trailer anti-lock braking system's connection status detection device, the device includes: the current detection circuit and the processing module; the current detection circuit is connected with the processing module and the power input end of the trailer anti-lock brake system and is used for detecting an input current signal of the trailer anti-lock brake system; and the processing module is used for receiving the input current signal transmitted through the chip interface so as to realize the detection of the connection state of the trailer anti-lock brake system through the input current signal. The current detection circuit is used for detecting an input current signal of the anti-lock braking system of the trailer, and the input current signal is detected in real time after the vehicle is powered on, so that the implementation process is simple and convenient, and the cost is low; and the input current signal of the trailer anti-lock braking system is detected, so that the condition that the detection result is inaccurate due to the damage of the device or other reasons when the detection is carried out according to the working current of the device on the vehicle is avoided, and the detection accuracy rate of the connection state of the trailer anti-lock braking system from the power input source of the trailer anti-lock braking system is higher.
Drawings
Fig. 1 is a schematic structural diagram of a connection status detection device of a trailer anti-lock brake system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a connection state detection device of a trailer anti-lock brake system according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a connection status detection device of a trailer anti-lock brake system according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural diagram of a connection status detection device for a trailer anti-lock brake system according to an embodiment of the present invention, which is applicable to a situation where the connection status of the trailer anti-lock brake system is detected. The device includes: a current detection circuit 11 and a processing module 12;
the current detection circuit 11 is connected with the processing module 12 and a power input end of the trailer anti-lock brake system 13 and is used for detecting an input current signal of the trailer anti-lock brake system 13;
and the processing module 12 is used for receiving the input current signal transmitted through the chip interface so as to realize connection state detection of the trailer anti-lock brake system 13 through the input current signal.
In this embodiment, the current detection circuit 11 may be specifically understood as a hardware circuit capable of detecting a current signal. The processing module 12 may be specifically understood as a data processor that analyzes the current signal to determine the connection state of the trailer antilock brake system; the input current signal is understood in particular to be a current signal at the power supply input of the trailer anti-lock brake system. The connection state includes: connected and disconnected, i.e. whether the trailer anti-lock brake system is connected or disconnected from the host vehicle.
Specifically, after the current detection circuit 11 is connected to a power input terminal of the trailer anti-lock brake system 13, an input current signal input to the trailer anti-lock brake system 13 is detected, and the obtained input current signal is sent to the processing module 12. The processing module 12 receives an input current signal transmitted through the chip interface, the input current signal is an analog quantity, the processing module 12 processes the input current signal, converts the input current signal into a digital signal, determines a corresponding input current value, and determines the connection state of the anti-lock brake system 13 through analyzing the input current value, so that the detection of the connection state of the anti-lock brake system of the trailer is realized.
Exemplary, the connection state detection process of the trailer anti-lock brake system is illustrated: a driver operates a key door of the vehicle, the vehicle enters an ON gear power-ON state, and a power supply of the main vehicle provides stable 24V voltage output for a trailer anti-lock brake system. If the anti-lock braking system of the trailer is connected, the trailer enters a normal working state after being electrified and self-checked, and stable power consumption is generated; if the trailer anti-lock brake system is not connected, no power consumption will occur. The current detection circuit 11 in the connection status detection device of the trailer anti-lock brake system of the host vehicle starts monitoring the current signal at the power supply input terminal of the trailer anti-lock brake system 13 in real time and sends the input current signal to the processing module 12. The processing module 12 processes the received input current signal to obtain a current value, and when the current value is greater than or equal to 50mA and the duration exceeds 100ms, the connection state of the trailer anti-lock brake system is determined to be connected; and when the current value is less than 50mA and the duration exceeds 100ms, determining that the trailer anti-lock brake system is disconnected.
It should be noted that 50mA is a current value when the trailer anti-lock brake system is normally operated, and may be set to other values according to the actual operating condition of the vehicle, which is not specifically limited in this application. The 100ms is also a value set according to the actual working condition of the vehicle, and may be set optionally, and this is not specifically limited in this application. Also, two sets of numerical values (50mA/100ms ) for judging whether the connection state is connected or not may be the same or different, that is, 4 numerical values may also be set to 50mA/100ms, 45mA/120ms, or the like.
An embodiment of the utility model provides a trailer anti-lock braking system's connection status detection device, the device includes: the current detection circuit and the processing module; the current detection circuit is connected with the processing module and the power input end of the trailer anti-lock brake system and is used for detecting an input current signal of the trailer anti-lock brake system; and the processing module is used for receiving the input current signal transmitted through the chip interface so as to realize the detection of the connection state of the trailer anti-lock brake system through the input current signal. The current detection circuit is used for detecting an input current signal of the anti-lock braking system of the trailer, and the input current signal is detected in real time after the vehicle is powered on, so that the implementation process is simple and convenient, and the cost is low; and the input current signal of the trailer anti-lock braking system is detected, so that the condition that the detection result is inaccurate due to the damage of the device or other reasons when the detection is carried out according to the working current of the device on the vehicle is avoided, and the detection accuracy rate of the connection state of the trailer anti-lock braking system from the power input source of the trailer anti-lock braking system is higher.
Example two
Fig. 2 is a schematic structural diagram of a connection status detection device of a trailer anti-lock brake system according to an embodiment of the present invention. The technical scheme of the embodiment is further refined on the basis of the technical scheme, and the device comprises: current detection circuit 21, processing module 22, power input interface 23 and power output interface 24.
A power input interface 23 connected to a power supply 25;
and a power output interface 24 connected with a trailer anti-lock brake system 26.
In the present embodiment, the power input interface 23 may be specifically understood as an interface for connecting with the power supply 25 to realize power input. The power output interface 24 may be understood to be an interface for outputting power provided by a power supply to the trailer antilock brake system 26, so as to supply power to the trailer antilock brake system 26.
In the prior art, the power supply 25 is connected directly to the trailer anti-lock brake system 26. In order to detect the magnitude of the input current of the trailer anti-lock brake system 26, the connection between the power supply 25 and the trailer anti-lock brake system 26 is realized through the power input interface 23 and the power output interface 24.
Further, the power output interface 24 is connected to a trailer antilock braking system 26 via a trailer antilock coil 27.
Further, the trailer antilock screw 27 includes at least a first power cord and a second power cord;
the power output interface supplies power to the trailer antilock braking system via a first power supply and a second power supply line in the trailer antilock spiral 27.
In this embodiment, the first power cord and the second power cord are two different power cords, and each cord in the trailer antilock helix has a unique identification PIN code, and for example, the first power cord in this embodiment may be PIN2 and the second power cord may be PIN 3. The power output interface provides electric energy for the trailer anti-lock brake system through the first power supply and the second power line.
Further, the current detection circuit 21 is connected to a power output interface 24 to realize a power input connection to a trailer anti-lock brake system 26.
Specifically, since the trailer anti-lock brake system 26 is connected to the power output interface 24 to supply power, and the current detection circuit 21 is used to detect the input current of the power input terminal of the trailer anti-lock brake system, the detection of the input current signal of the trailer anti-lock brake system 26 can be realized by connecting the current detection circuit 21 to the power output interface 24. The detection of the connection state of the trailer anti-lock brake system depends on the detection of the power supply current. Therefore, the risk of misjudgment of the connection state after the trailer anti-lock brake system is electrified and detected after the window period does not exist. Under any working condition, as long as the trailer anti-lock brake system and the main vehicle are in a power-on connection state, the trailer anti-lock brake system is in a working state, and the generated working current is detected by a connection state detection device of the trailer anti-lock brake system, so that the trailer anti-lock brake system is judged to be connected.
Further, the processing module 22 is connected to a power output interface 24 for controlling the power supply of the trailer anti-lock brake system.
After the processing module 22 is connected to the power output interface 24, the operating state (start or stop) of the power output interface 24 may be controlled by a control command, so as to control the power supply of the trailer anti-lock brake system 26.
An embodiment of the utility model provides a trailer anti-lock braking system's connection status detection device, the device includes: the device comprises a current detection circuit, a processing module, a power input interface and a power output interface. The current detection circuit is used for detecting an input current signal of the anti-lock braking system of the trailer, and the input current signal is detected in real time after the vehicle is powered on, so that the implementation process is simple and convenient, and the cost is low; and the input current signal of the trailer anti-lock braking system is detected, so that the condition that the detection result is inaccurate due to the damage of the device or other reasons when the detection is carried out according to the working current of the device on the vehicle is avoided, and the detection accuracy rate of the connection state of the trailer anti-lock braking system from the power input source of the trailer anti-lock braking system is higher. The power supply device supplies power to the trailer anti-lock brake system through the power input interface and the power output interface, is favorable for detecting an input current signal of the trailer anti-lock brake system, enables the detection result of the connection state of the trailer anti-lock brake system to be more accurate, and is simple to realize and easy to operate.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a connection status detection device of a trailer anti-lock brake system according to a third embodiment of the present invention. The technical scheme of the embodiment is further refined on the basis of the technical scheme, and the device comprises: current detection circuitry 31, processing module 32, power input interface 33, power output interface 34, and controller area network communication module 35.
And the controller area network communication module 35 is connected to the processing module 32 and the vehicle controller area network 36, and is configured to convert the received connection state into a connection state signal and send the connection state signal to the vehicle controller area network 36.
In this embodiment, the controller area network communication module 35 may be specifically understood as a communication module that transmits controller area network CAN format data, and may implement format conversion between data in any format and CAN format data. A connection state signal is understood in particular to mean a data signal representing different connection states.
Specifically, the processing module 32 sends the connection state to the controller area network communication module 35, and after receiving the connection state, the controller area network communication module 35 converts the connection state into a connection state signal in a format recognizable by the vehicle controller area network 36, and then sends the connection state signal to the vehicle controller area network 36, so that the vehicle controller area network 36 can determine a braking control strategy according to the connection state signal, and thus driving safety is ensured. The connection status signal may be an SAE 1939 standard signal, SPN 1836. The processing module 32 is connected with the controller area network communication module 35, and performs signal format conversion through the controller area network communication module 35 to realize information interaction with other electric control systems on the main vehicle CAN network.
An embodiment of the utility model provides a trailer anti-lock braking system's connection status detection device, the device includes: the device comprises a current detection circuit, a processing module, a power input interface, a power output interface and a controller area network communication module. The method has the advantages of simple and convenient implementation process, low cost and high detection accuracy. The format conversion of the data is carried out through the controller area network communication module, the format conversion between the data in any data format and the data in the CAN communication format CAN be realized, and the data interaction between the data in any data format and the main vehicle CAN network is further realized.
It should be understood that the remaining connection relationships are the same as those in the previous embodiment, and the embodiments of the present application are not described herein. In the embodiment of the present application, the external power supply 37 and the trailer anti-lock brake system 38 are still taken as an example, the power input interface 33 is connected with the power supply 37, and the power output interface 34 is connected with the trailer anti-lock brake system 38 through a trailer anti-lock spiral line 39.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (7)
1. A connection state detecting device of a trailer anti-lock brake system, comprising: the current detection circuit and the processing module;
the current detection circuit is connected with the processing module and a power input end of the trailer anti-lock brake system and is used for detecting an input current signal of the trailer anti-lock brake system;
and the processing module is used for receiving the input current signal transmitted through the chip interface so as to realize the connection state detection of the trailer anti-lock brake system through the input current signal.
2. The apparatus of claim 1, further comprising: a power input interface and a power output interface;
the power input interface is connected with a power supply;
and the power output interface is connected with the trailer anti-lock brake system.
3. The apparatus of claim 2, wherein the power output interface is coupled to the trailer antilock braking system via a trailer antilock coil.
4. The apparatus of claim 3, wherein the trailer antilock helical line comprises at least a first power cord and a second power cord;
and the power output interface supplies power to the trailer anti-lock brake system through a first power supply and a second power supply line in the trailer anti-lock spiral line.
5. The apparatus of claim 2, wherein the current sensing circuit is connected to the power output interface to effect connection to a power input of a trailer antilock brake system.
6. The apparatus of claim 2, wherein the processing module is coupled to the power output interface for controlling power to the trailer antilock brake system.
7. The apparatus of any of claims 1-6, further comprising: a controller area network communication module;
the controller area network communication module is connected with the processing module and the vehicle control unit area network, and is used for converting the received connection state into a connection state signal and sending the connection state signal to the vehicle control unit area network.
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| CN202120590237.5U CN214565283U (en) | 2021-03-23 | 2021-03-23 | Trailer anti-lock braking system's connection status detection device |
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| CN202120590237.5U CN214565283U (en) | 2021-03-23 | 2021-03-23 | Trailer anti-lock braking system's connection status detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114084084A (en) * | 2021-11-17 | 2022-02-25 | 一汽解放汽车有限公司 | Trailer connection state judgment method, device computer equipment and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114084084A (en) * | 2021-11-17 | 2022-02-25 | 一汽解放汽车有限公司 | Trailer connection state judgment method, device computer equipment and storage medium |
| CN114084084B (en) * | 2021-11-17 | 2023-12-26 | 一汽解放汽车有限公司 | Trailer connection state judging method, device, computer equipment and storage medium |
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