CN214150787U - Wheel speed sensor testing device - Google Patents
Wheel speed sensor testing device Download PDFInfo
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- CN214150787U CN214150787U CN202120478637.7U CN202120478637U CN214150787U CN 214150787 U CN214150787 U CN 214150787U CN 202120478637 U CN202120478637 U CN 202120478637U CN 214150787 U CN214150787 U CN 214150787U
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Abstract
The utility model discloses a fast sensor testing arrangement of wheel, include: a wheel speed sensor, an ESP controller, a signal conversion controller and a diagnostic device. A wheel speed sensor is mounted on the wheel, the wheel speed sensor detecting a wheel speed of the wheel and generating a wheel speed signal. The ESP controller receives a wheel speed signal detected by a wheel speed sensor. The relay switch set is connected between the wheel speed sensor and the ESP controller, and the relay switch set is switched on and off to simulate the fault of the wheel speed sensor. The signal conversion controller is connected to the vehicle-mounted power supply and the signal bus, the output of the signal conversion controller is connected to the relays in the relay switch group, the signal conversion controller receives control signals from the signal bus, the vehicle-mounted power supply converts the control signals to generate switching signals of the relays, and the switching signals are output to the relays to control the on and off of the relays. The diagnostic device is connected to the signal conversion controller and the diagnostic interface of the vehicle, and collects test data and vehicle fault diagnosis data.
Description
Technical Field
The utility model relates to an automobile parts field, more specifically say, relate to automobile parts's test technical field.
Background
The wheel speed signal is an important parameter for engine control torque output, transmission control gear shifting, and active safety control. The wheel speed sensor signal is the main signal that the Electronic Stability Program (ESP) electronic control unit needs to collect, and the ESP electronic control unit calculates the slip rate of each wheel according to the signal to determine whether to implement the braking force adjustment for the corresponding wheel, so as to ensure that the wheel is not locked when braking under various road conditions and prevent the automobile from skidding when braking and turning. If the wheel speed sensor is disconnected or short-circuited, so that the signal of the wheel speed sensor is not available, the ESP is difficult to maintain normal working capacity, and the wheel may be locked or brake off tracking may occur during braking. Meanwhile, the dynamic property and the economical efficiency of an engine can be influenced, the gearbox body is damaged, and the running state judgment of a vehicle power system and the personal safety of a driver are directly influenced.
The wheel speed sensors in the ESP are frequently in failure, most of the ESP used in the automobile main engine plant are provided by suppliers, the underlying design logic of software is not clear, and the influence of the instantaneous interruption of a single wheel speed sensor signal or a plurality of combined wheel speed sensor signals on the whole automobile function cannot be accurately judged. For a main engine plant, the influence of the wheel speed sensor signal fault on the ESP function and the performance of the whole engine needs to be verified through a whole engine test. In the traditional ESP function test process, an engineer needs to manually disconnect a signal wire of a wheel speed sensor and recover a wire harness, and the whole process has certain limitation. For example, a plurality of signal lines cannot be operated simultaneously at a certain moment, signal interruption or short-circuit time is not controllable, wheel speed signal interruption or short-circuit fault in a very short time cannot be reproduced, and a required test condition cannot be obtained.
SUMMERY OF THE UTILITY MODEL
According to the utility model discloses an embodiment provides a fast sensor testing arrangement of wheel, include: a wheel speed sensor, an ESP controller, a signal conversion controller and a diagnostic device. A wheel speed sensor is mounted on the wheel, the wheel speed sensor detecting a wheel speed of the wheel and generating a wheel speed signal. The ESP controller receives a wheel speed signal detected by a wheel speed sensor. The relay switch set is connected between the wheel speed sensor and the ESP controller, and the relay switch set is switched on and off to simulate the fault of the wheel speed sensor. The signal conversion controller is connected to the vehicle-mounted power supply and the signal bus, the output of the signal conversion controller is connected to the relays in the relay switch group, the signal conversion controller receives control signals from the signal bus, the vehicle-mounted power supply converts the control signals to generate switching signals of the relays, and the switching signals are output to the relays to control the on and off of the relays. The diagnostic device is connected to the signal conversion controller and the diagnostic interface of the vehicle, and collects test data and vehicle fault diagnosis data.
In one embodiment, the relay switch set includes an on-off relay set and a shorting relay set. The on-off relay is connected in series with signal lines of the wheel speed sensor and the ESP controller, and the on-off relay is switched on and off to simulate the open circuit fault of the wheel speed sensor. The short circuit relay is connected between the positive and negative poles of the wheel speed sensor, and the short circuit relay is switched on and off to simulate the short circuit fault of the wheel speed sensor.
In one embodiment, the number of the wheel speed sensors is four, and the anode and the cathode of each wheel speed sensor are respectively connected to the ESP controller through a signal line.
In one embodiment, the number of the on-off relays is eight, and the on-off relays are respectively connected in series with the positive and negative electrodes of the four wheel speed sensors and the signal line of the ESP controller. The number of the short-circuit relays is four, and the short-circuit relays are respectively connected between the positive pole and the negative pole of each wheel speed sensor.
In one embodiment, the relay switch group uses an electromagnetic relay having a pair of switching contacts, a rated input switching voltage of 5V on the coil side, a pull-in time of 5ms, and a release time of 2 ms.
In one embodiment, the output of the signal conversion controller is connected to the coil side input end of the electromagnetic relay, and the signal conversion controller converts the 12V direct current of the vehicle-mounted power supply into 5V direct current and outputs the 5V direct current to the electromagnetic relay according to the control signal to control the opening and closing of the electromagnetic relay.
In one embodiment, the diagnostic device is connected to an OBD diagnostic interface of the vehicle.
The utility model discloses a fast sensor signal break-make recurrence test problem of wheel that exists among the wheel speed sensor testing arrangement prior art provides the controllable device of the fast sensor signal break-make of vehicle, provides the convenience to fast sensor fault recurrence of car, braking system's fault detection, braking test and whole car safety test, practices thrift tester's time and energy, guarantees the safety of testing process, facilitate promotion and use. The wheel speed sensor testing device can be applied to vehicle static testing, and can verify the influence of fault codes generated by signal interruption and short circuit of a static lower wheel speed sensor and the fault codes on signals of an ESP (electronic stability program) and a whole vehicle controller; the utility model discloses a fast sensor testing arrangement of wheel also can use in vehicle dynamic test, verifies the influence of the fault code that fast sensor signal interruption of developments lower wheel, short circuit produced to ESP function and whole car performance.
The utility model discloses a wheel speed sensor testing arrangement has following beneficial effect:
the structure is simple, and the foundation modification is convenient to be carried out on the basis of the original wire harness;
the used equipment has low cost and simple operation flow;
the on-off of a signal line of a wheel speed sensor in a certain circuit can be accurately controlled;
the on-off of signal lines of the wheel speed sensors in a plurality of circuits can be controlled simultaneously;
the actuator responds with a reaction speed on the order of milliseconds;
effectively preventing signal interference.
Drawings
Fig. 1 is a block diagram of a wheel speed sensor testing apparatus according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a block diagram of a wheel speed sensor testing apparatus according to an embodiment of the present invention. Referring to fig. 1, the wheel speed sensor testing apparatus includes: wheel speed sensors, an ESP controller 102, a relay switch set, a signal conversion controller 103, and a diagnostic device 104.
A wheel speed sensor is mounted on the wheel, the wheel speed sensor detecting a wheel speed of the wheel and generating a wheel speed signal. In the illustrated embodiment, four wheel speed sensors are shown: a left front wheel speed sensor 111, a right front wheel speed sensor 112, a left rear wheel speed sensor 113, and a right rear wheel speed sensor 114. Each wheel speed sensor has a positive electrode and a negative electrode.
The relay switch group is connected between the wheel speed sensor and the ESP controller, the relay switch group comprises a plurality of relays, and the relays are switched on and off to simulate the faults of the wheel speed sensor. In the illustrated embodiment, the relay switch sets include on-off relay sets and shorting relay sets. The on-off relay is connected in series with signal lines of the wheel speed sensor and the ESP controller, and the on-off relay is switched on and off to simulate the open circuit fault of the wheel speed sensor. In the illustrated embodiment, eight on-off relays are respectively KF 1-KF 8, KF 1-KF 8, and the eight relays are respectively connected in series with the positive and negative electrodes of the four wheel speed sensors and the signal line of the ESP controller. The positive electrode and the negative electrode output circuit of the left front wheel speed sensor 111 are controlled to be switched on and switched off respectively by the relays KF1 and KF2, the positive electrode and the negative electrode output circuit of the right front wheel speed sensor 112 are controlled to be switched on and switched off respectively by the relays KF3 and KF4, the positive electrode and the negative electrode output circuit of the left rear wheel speed sensor 113 are controlled to be switched on and switched off respectively by the relays KF5 and KF6, and the positive electrode and the negative electrode output circuit of the right rear wheel speed sensor 114 are controlled to be switched on and switched off respectively by the relays KF7 and KF 8. Relays KF1 to KF8 in the on-off relay group are set as normally closed relays and are opened only when receiving a switching signal. The short circuit relay is connected between the positive and negative poles of the wheel speed sensor, and the short circuit relay is switched on and off to simulate the short circuit fault of the wheel speed sensor. In the illustrated embodiment, four short-circuit relays are respectively KF 9-KF 12, KF 9-KF 12, and the four short-circuit relays are respectively connected between the positive electrode and the negative electrode of each wheel speed sensor. Wherein relay KF9 is used for controlling the positive and negative circuit short circuit of the left front wheel speed sensor 111, relay KF10 is used for controlling the positive and negative circuit short circuit of the right front wheel speed sensor 112, relay KF11 is used for controlling the positive and negative circuit short circuit of the left rear wheel speed sensor 113, and relay KF12 is used for controlling the positive and negative circuit short circuit of the right rear wheel speed sensor 114. Relays KF 9-KF 12 in the short circuit relay group are set as normally open relays and are closed only when receiving the switching signal. The original connection state of the wire harnesses is maintained for other wire harnesses of the vehicle. In one embodiment, the relays KF 1-KF 12 used in the relay switch group are all electromagnetic relays, each electromagnetic relay has a pair of switching contacts, the rated input switching voltage on the coil side is 5V, the pull-in time is 5ms, and the release time is 2 ms. The electromagnetic relay has the characteristics of quick suction and release.
The signal conversion controller 103 is connected to the in-vehicle power supply 105 and the signal bus 106. The signal conversion controller 103 is a digital quantity/switching quantity conversion controller, the output of the signal conversion controller 103 is connected to the relays in the relay switch group, the signal conversion controller receives the control signal from the signal bus 106, the switching signal of the relays is generated by the conversion of the vehicle-mounted power supply according to the control signal, and the switching signal is output to the relays to control the on and off of the relays. In one embodiment, the vehicle-mounted power supply is a 12V dc power supply, the output of the signal conversion controller 103 is connected to the coil side input terminal of the electromagnetic relay, and the signal conversion controller converts the 12V dc of the vehicle-mounted power supply into 5V dc and outputs the 5V dc to the electromagnetic relay according to the control signal to control the on/off of the electromagnetic relay. The control signal is from a testing device, such as a testing computer, which generates a control signal through testing software, and the control signal is sent to the signal conversion controller 103 through the signal bus 106. According to the requirements of the test, the control signals can selectively open or close some of the relays KF 1-KF 12 through the signal conversion controller 103 to simulate various fault combinations of the wheel speed sensor, such as open circuit, short circuit, single fault, multiple faults, etc.
The diagnostic device 104 is connected to the signal conversion controller 103 and a diagnostic interface 107 of the vehicle, and the diagnostic device 104 collects test data and failure diagnosis data of the vehicle. In one embodiment, the diagnostic device 104 is connected to an OBD diagnostic interface of the vehicle. The diagnostic equipment is connected with an OBD diagnostic port of the whole vehicle, fault diagnosis is carried out on a whole vehicle controller, fault codes of whether a line is interrupted or a short circuit occurs in a wheel speed sensor in an ESP control unit are read, and meanwhile, the diagnostic equipment can be used for recording related information of data streams so as to determine the data stream change condition of other controllers caused by faults of the wheel speed sensor.
The utility model discloses a wheel speed sensor testing arrangement adopts digital quantity/switching value conversion controller, and usable on-vehicle 12V mains operated has the characteristics that the energy consumption is low. The wheel speed sensor testing device is provided with a CAN bus interface for controlling the on-off of signals of the wheel speed sensor at a high speed, and the transmission speed CAN reach 1 Mbit/s. The device has 8 digital quantity input channels and 8 analog quantity output channels, and can continuously output 5V direct current voltage. The voltage output end is connected with 12 electromagnetic relay coil side working power supplies through wiring harnesses, and 5V direct current power supply is provided for the electromagnetic relays. The working environment temperature of the device is-40-70 ℃, and the device can adapt to most test working condition environments. The digital quantity/switching value conversion controller is connected with the testing computer through a data line and receives control instruction data of the testing computer.
Use the utility model discloses a first example process that wheel speed sensor testing arrangement tested as follows:
the method comprises the following steps: determining a target wheel speed sensor according to the test plan;
step two: selecting a relay serial number to be controlled in test software according to a target wheel speed sensor, and converting the relay serial number into a digital signal 01;
step three: setting the off time and the pull-in time of a relay in test software, and converting the off time and the pull-in time into a digital signal 02;
step four: activating a main switch in test software, and sending digital signals 01 and 02 to a digital quantity/switching quantity conversion controller;
step five: the digital quantity/switching quantity conversion controller converts the digital signals 01 and 02 into switching signals of a target relay;
step six: triggering a relay to act and controlling the on-off of a signal of the wheel speed sensor;
step seven: and carrying out fault diagnosis on the whole vehicle controller through the diagnosis equipment and collecting the whole vehicle data flow and control instruction data.
Use the utility model discloses a second example process that wheel speed sensor testing arrangement tested as follows:
in the present example, the left front wheel speed sensor is mainly tested, and the content of the test is to simulate the occurrence of the open circuit fault of the left front wheel speed sensor. The relay to be operated is KF 1. In this example, the relay KF1 is provided as a normally closed relay. The normally closed electromagnetic relay KF1 is connected in series with the positive pole of the left front wheel speed sensor installed on the automobile; the digital quantity/switching value conversion controller provides 5V direct current power supply for the coil side of KF 1; the test computer is connected with the digital quantity/switching value conversion controller through a data line; and writing a control program in the test software. The specific process is as follows:
the method comprises the following steps: determining a left front wheel speed sensor as a test target according to the test plan;
step two: selecting the serial number of a relay KF1 to be controlled in test software, and converting the serial number into a digital signal 01;
step three: setting relay pull-in time in test software, and converting the relay pull-in time into a digital signal 02;
step four: activating a main switch in test software, and sending digital signals 01 and 02 to a digital quantity/switching quantity conversion controller;
step five: the digital quantity/switching value conversion controller converts the digital signals 01 and 02 into a pull-in signal of a KF1 relay, and 5V direct current power supply is provided for the coil side of the KF1 relay;
step six: the KF1 relay is closed to disconnect the positive signal circuit of the left front wheel speed sensor;
step seven: and carrying out fault diagnosis on the whole vehicle controller through the diagnosis equipment and collecting the whole vehicle data and the control instruction data in the fourth step.
Use the utility model discloses a third example process that wheel speed sensor testing arrangement tested as follows:
in this example, the right front wheel speed sensor is mainly tested, and the test content is to simulate the occurrence of an open circuit fault of the right front wheel speed sensor. The relay to be operated is KF 10. In this example, the relay KF10 is provided as a normally open relay. The normally open electromagnetic relay KF10 is connected with the positive and negative circuits of the right front wheel speed sensor installed on the automobile; the digital quantity/switching value conversion controller provides 5V direct current power supply for the coil side of KF 10; the test computer is connected with the digital quantity/switching value conversion controller through a data line; and writing a control program in the test software. The specific process is as follows:
the method comprises the following steps: determining a right front wheel speed sensor as a test target according to the test plan;
step two: selecting the serial number of a relay KF10 to be controlled in test software, and converting the serial number into a digital signal 01;
step three: setting relay pull-in time in test software, and converting the relay pull-in time into a digital signal 02;
step four: activating a main switch in test software, and sending digital signals 01 and 02 to a digital quantity/switching quantity conversion controller;
step five: the digital quantity/switching value conversion controller converts the digital signals 01 and 02 into a pull-in signal of a KF10 relay, and 5V direct current power supply is provided for the coil side of the KF10 relay;
step six: the KF10 relay is used for attracting and short-circuiting a positive and negative electrode signal circuit of the right front wheel speed sensor;
step seven: and carrying out fault diagnosis on the whole vehicle controller through the diagnosis equipment and collecting the whole vehicle data and the control instruction data in the fourth step.
The utility model discloses a fast sensor testing arrangement of wheel can use in the static test of vehicle, verifies the trouble code and the trouble code of the fast sensor signal interruption of static lower wheel, short circuit production to ESP and vehicle control unit signal's influence. The utility model discloses a fast sensor testing arrangement of wheel also can use in vehicle dynamic test, verifies the influence of the fault code that fast sensor signal interruption of developments lower wheel, short circuit produced to ESP function and whole car performance.
The utility model discloses a fast sensor signal break-make recurrence test problem of wheel that exists among the wheel speed sensor testing arrangement prior art provides the controllable device of the fast sensor signal break-make of vehicle, provides the convenience to fast sensor fault recurrence of car, braking system's fault detection, braking test and whole car safety test, practices thrift tester's time and energy, guarantees the safety of testing process, facilitate promotion and use. The wheel speed sensor testing device can be applied to vehicle static testing, and can verify the influence of fault codes generated by signal interruption and short circuit of a static lower wheel speed sensor and the fault codes on signals of an ESP (electronic stability program) and a whole vehicle controller; the utility model discloses a fast sensor testing arrangement of wheel also can use in vehicle dynamic test, verifies the influence of the fault code that fast sensor signal interruption of developments lower wheel, short circuit produced to ESP function and whole car performance.
The utility model discloses a wheel speed sensor testing arrangement has following beneficial effect:
the structure is simple, and the foundation modification is convenient to be carried out on the basis of the original wire harness;
the used equipment has low cost and simple operation flow;
the on-off of a signal line of a wheel speed sensor in a certain circuit can be accurately controlled;
the on-off of signal lines of the wheel speed sensors in a plurality of circuits can be controlled simultaneously;
the actuator responds with a reaction speed on the order of milliseconds;
effectively preventing signal interference.
It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is obvious that the present invention is not limited to the above embodiments, and similar changes or modifications can be directly derived or easily suggested by those skilled in the art from the disclosure of the present invention, and all should fall within the protection scope of the present invention. The above-described embodiments are provided to enable persons skilled in the art to make or use the invention, and many modifications and variations may be made to the above-described embodiments by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of the invention is not limited by the above-described embodiments, but should be accorded the widest scope consistent with the innovative features set forth in the claims.
Claims (7)
1. A wheel speed sensor testing device, comprising:
the system comprises a wheel speed sensor, a control unit and a control unit, wherein the wheel speed sensor is arranged on a wheel and detects the wheel speed of the wheel and generates a wheel speed signal;
the ESP controller receives a wheel speed signal detected by the wheel speed sensor;
the relay switch group is connected between the wheel speed sensor and the ESP controller and is switched on and off to simulate the fault of the wheel speed sensor;
the signal conversion controller is connected to the vehicle-mounted power supply and the signal bus, the output of the signal conversion controller is connected to the relays in the relay switch group, the signal conversion controller receives control signals from the signal bus, the vehicle-mounted power supply converts the control signals to generate switching signals of the relays, and the switching signals are output to the relays to control the on and off of the relays;
and the diagnostic equipment is connected to the signal conversion controller and the diagnostic interface of the vehicle and collects the test data and the fault diagnosis data of the vehicle.
2. The wheel speed sensor testing device of claim 1,
the relay switch group comprises an on-off relay group and a short-circuit relay group;
the on-off relay is connected in series with signal lines of the wheel speed sensor and the ESP controller and is switched on and off to simulate the open circuit fault of the wheel speed sensor;
the short circuit relay is connected between the positive and negative poles of the wheel speed sensor, and the short circuit relay is switched on and off to simulate the short circuit fault of the wheel speed sensor.
3. The wheel speed sensor testing device of claim 2, wherein the number of the wheel speed sensors is four, and the positive and negative poles of each wheel speed sensor are respectively connected to the ESP controller through a signal line.
4. The wheel speed sensor testing device of claim 3,
eight on-off relays are respectively connected in series with the positive and negative electrodes of the four wheel speed sensors and signal wires of the ESP controller;
the number of the short-circuit relays is four, and the short-circuit relays are respectively connected between the positive pole and the negative pole of each wheel speed sensor.
5. The wheel speed sensor testing device of claim 2, wherein the relay switch set uses an electromagnetic relay having a pair of switching contacts, a coil side rated input switching voltage of 5V, a pull-in time of 5ms, and a release time of 2 ms.
6. The wheel speed sensor testing device of claim 5, wherein the output of the signal conversion controller is connected to the coil side input terminal of the electromagnetic relay, and the signal conversion controller converts the 12V DC of the vehicle power supply into 5V DC, and outputs the 5V DC to the electromagnetic relay according to the control signal to control the opening and closing of the electromagnetic relay.
7. The wheel speed sensor testing apparatus of claim 1, wherein the diagnostic device is connected to an OBD diagnostic interface of a vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120478637.7U CN214150787U (en) | 2021-03-05 | 2021-03-05 | Wheel speed sensor testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120478637.7U CN214150787U (en) | 2021-03-05 | 2021-03-05 | Wheel speed sensor testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214150787U true CN214150787U (en) | 2021-09-07 |
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ID=77553948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120478637.7U Active CN214150787U (en) | 2021-03-05 | 2021-03-05 | Wheel speed sensor testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214150787U (en) |
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2021
- 2021-03-05 CN CN202120478637.7U patent/CN214150787U/en active Active
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