CN210052058U - Testing device of vehicle control unit - Google Patents

Abstract

The utility model discloses a testing device of a vehicle control unit, which comprises a microprocessor unit, an analog feedback sensor output module, an analog PTC temperature sensor output module and a data communication module, wherein the analog feedback sensor output module is used for outputting a voltage and current signal to the vehicle control unit, the input end of the analog feedback sensor output module is connected with the output end of the microprocessor unit, and the output end of the analog feedback sensor output module is connected to the vehicle control unit; the PTC temperature sensor output module is used for outputting an analog temperature signal to the whole vehicle controller, and the input end of the PTC temperature sensor output module is connected with the microprocessor unit; the microprocessor unit is connected with the output end of the vehicle control unit through the data communication module; and the input end of the microprocessor is connected with a human-computer interaction interface. The utility model has the advantages that: the signals collected by the whole vehicle controller during actual work are simulated through a plurality of different types of output units, and then the output signals of the whole vehicle controller are received through the CAN or the isolation unit, so that the detection of the whole vehicle controller is realized.

Description

Testing device of vehicle control unit

Technical Field

The utility model relates to an automobile hardware tests the field, in particular to vehicle control unit's testing arrangement.

Background

The whole electric vehicle controller is used as the most important controller on the vehicle, plays a vital role in controlling the whole vehicle, and therefore, the safety quality of the whole vehicle is guaranteed when the whole electric vehicle controller is tested. The conventional testing device for the whole electric vehicle controller generally requires high software and hardware cost, is realized through special equipment and complex operation skills, and is not beneficial to the rapid testing of the whole electric vehicle controller and the cost reduction.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a test device of a vehicle control unit, which is used for realizing the test of the vehicle control unit and facilitating debugging personnel to check test data.

In order to achieve the purpose, the invention adopts the technical scheme that: a testing device of a vehicle control unit comprises a microprocessor unit, an analog feedback sensor output module, an analog PTC temperature sensor output module and a data communication module, wherein the analog feedback sensor output module is used for outputting a voltage and current signal to the vehicle control unit, the input end of the analog feedback sensor output module is connected with the output end of the microprocessor unit, and the output end of the analog feedback sensor output module is connected to the vehicle control unit; the PTC temperature sensor output module is used for outputting an analog temperature signal to the whole vehicle controller, and the input end of the PTC temperature sensor output module is connected with the microprocessor unit; the microprocessor unit is connected with the output end of the vehicle control unit through the data communication module; the input end of the microprocessor is connected with a human-computer interaction interface.

The data communication module comprises a CAN communication module and an isolation digital input module, and the microprocessor unit is connected with the whole vehicle controller through the CAN communication module and the isolation digital input module respectively.

The testing device also comprises a push-pull output module, and the input end of the push-pull output module is connected with the microprocessor unit.

The isolated digital input module includes an optocoupler.

The analog feedback sensor output module includes an analog-to-digital converter.

The output module of the analog PTC temperature sensor adopts a MAX5432 chip to output a temperature signal acquired when the analog whole vehicle controller works.

The utility model has the advantages that: the method comprises the following steps that signals collected by the whole vehicle controller during actual work are simulated through a plurality of different types of output units, and then the output signals of the whole vehicle controller are received through a CAN or isolation unit, so that the detection of the whole vehicle controller is realized; the testing device is simple in structure, the adopted simulation device is low in cost, the detection cost of the vehicle control unit is low, the vehicle control unit is convenient to popularize and use, meanwhile, the compatibility is good, and different performances of the vehicle control unit can be tested according to different requirements.

Drawings

The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:

FIG. 1 is a block diagram of the present invention;

fig. 2 is a schematic diagram of the structure of the present invention.

The reference numerals in the figures are respectively: 1. a push-pull output module; 2. an isolated digital input module; 3. an output module of the analog PTC temperature sensor; 4. a CAN communication module; 5. an analog feedback sensor output module; 6. a microprocessor unit; 7. human-computer interaction interface

Detailed Description

The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.

As shown in fig. 1, a testing device of a vehicle control unit includes a microprocessor unit, an analog feedback sensor output module, an analog PTC temperature sensor output module, and a data communication module, where the analog feedback sensor output module is used to output a voltage and current signal to the vehicle control unit, an input end of the analog feedback sensor output module is connected with an output end of the microprocessor unit, and an output end of the analog feedback sensor output module is connected to the vehicle control unit; the PTC temperature sensor output module is used for outputting an analog temperature signal to the whole vehicle controller, and the input end of the PTC temperature sensor output module is connected with the microprocessor unit; the microprocessor unit is connected with the output end of the vehicle control unit through the data communication module; the input end of the microprocessor is connected with the human-computer interaction interface.

The working principle is as follows: the microprocessor unit outputs corresponding signals to the input end of the vehicle control unit through respectively controlling the analog feedback sensor output module and the analog PTC temperature sensor output module, the output signals corresponding to the output end of the vehicle control unit are transmitted to the microprocessor unit through the data communication module, and the microprocessor unit uploads the signals to the human-computer interaction interface. Therefore, the microprocessor controls the output module of the analog feedback sensor and the output module of the analog PTC temperature sensor to output signals to the vehicle control unit, the vehicle control unit should output signals for controlling the temperature reduction of the PTC temperature according to the output signals corresponding to the signals, such as the input PTC temperature information, if the analog temperature is too high, the output end of the vehicle control unit should output signals for controlling the temperature reduction of the PTC temperature, the microprocessor unit reads the data signals of the vehicle control unit through the data transmission unit and then transmits the data to the human-computer interaction interface, so that a detector can judge whether the output of the vehicle control unit is abnormal according to the actual analog input signals and the detected output signals of the vehicle control unit, and detection is finished. Because the microprocessor is adopted to control and simulate different sensors or PTC output signals to the vehicle control unit to detect the output signals of the vehicle control unit, whether the vehicle control unit can output various protection signals according to requirements or not under various input simulation parameters can be detected, the output signals are displayed by the human-computer interaction interface after being detected by the data communication module, and detection personnel can conveniently check the output signals.

The data communication module comprises a CAN communication module and an isolation digital input module, and the microprocessor unit is connected with the whole vehicle controller through the CAN communication module and the isolation digital input module respectively. And the device is used for respectively reading isolated digital signals of CAN signals at the output end of the whole vehicle controller.

The testing device also comprises a push-pull output module, and the input end of the push-pull output module is connected with the microprocessor unit. The push-pull output circuit is used for controlling power supply and electrification of the whole vehicle controller through the triode.

The on-line testing device for the whole vehicle controller for the electric vehicle comprises an isolation digital input module, a push-pull output module, a microprocessor unit, an analog voltage feedback sensor module, an analog PTC temperature sensor output module, a CAN communication module and a human-computer interface. The isolation digital input module is connected with the microprocessor unit, the push-pull output module is connected with the microprocessor unit, the human-computer interface is connected with the microprocessor unit, the analog voltage feedback sensor output module is connected with the microprocessor unit, the analog PTC temperature sensor output module is connected with the microprocessor unit, and the CAN communication module is connected with the microprocessor unit.

The push-pull output module adopts a triode, the Q1 model is an NPN triode 5551, and the Q2 model is a PNP triode 5401. The isolated digital input module adopts an optical coupler, and the model is PC 817. The CAN communication module adopts a CAN communication chip with the model of TJA1042 and a common mode choke coil with the model of DLW43 SH. The output module of the analog PTC temperature sensor adopts a digital potentiometer chip with the model number of MAX 5432. The analog voltage feedback sensor module adopts an analog voltage output chip with the model number of DAC 8. The micro-processing unit adopts a CPU, and the chip model of the micro-processing unit is TMS570LC 4357. And the drain electrode of the Q1 of the push-pull output module is connected with the drain electrode of the Q2.

The test principle of the electric vehicle controller test device comprises the following steps: the microprocessor unit outputs signals to the push-pull output module, the analog voltage feedback sensor module and the analog PTC temperature sensor output module according to a control strategy of a human-computer interface; and outputting the signal to the vehicle control unit, acquiring an output signal corresponding to the vehicle control unit by reading the isolation digital input module and interacting with the CAN communication module through the microprocessor, and judging whether the detection result is correct or not by a detector according to the output signal of the vehicle control unit displayed on the man-machine interaction interface.

The analog voltage feedback sensor module adopts a DAC8 chip and is used for outputting a signal MCU _ OUT1_0-7, converting an 8-bit digital signal into an analog signal in an equal amount and outputting the analog signal to the vehicle controller Device _ DA _ OUT 1. The output module of the analog PTC temperature sensor outputs a grounded variable resistor to simulate the PTC temperature sensor, and the model of the chip is MAX 5432. The two signals are correspondingly input into the vehicle control unit, and the vehicle control unit needs to make corresponding output signal operation according to the signals. The isolation digital input module 2 adopts a switch mos tube and an optical coupler and is used for transmitting a digital output signal VCU _ OUTSign1 of a VCU port to a check _ VCU _ sign1 of a microprocessor unit at a testing device end, and the microprocessor unit 6 reads a check _ VCU _ sign1 signal and reflects the VCU state. The MOS tube type is 2N7002, and the optocoupler type is PC 817. The CAN communication module 4 adopts a chip TJA1042, the model of a common mode choke coil is DLW43SH,

the simulation ECU and the VCU carry out communication interaction to obtain the output and communication data of the whole vehicle controller, and the human-computer interface carries out human-computer interaction with the MCU module of the microprocessor through the RS485 communication interface. The CPU model adopted by the MCU module is TMS570LC 4357. Therefore, the output signal corresponding to the vehicle control unit can be read and displayed, and a detection person can conveniently judge whether the output is normal according to the actual output control signal of the vehicle control unit. The microprocessor unit outputs signals to the push-pull output module according to a control strategy of a human-computer interface, enables a VCU power supply, enables related digital and power supply signals, sends an I2C control signal to the analog PTC temperature sensor output module, adjusts a digital potentiometer MAX5432, generates a temperature-sensitive resistor of an analog PTC, adjusts the temperature of VCU input, outputs digital signals through MCU _ OUT1_0-7 pins of the microprocessor unit, converts the digital signals into analog signals through DAC8, generates various sensor signals input by the VCU, generates information of CAN pins of the microprocessor unit through communication between a CAN communication module and a VCU CAN, reads the isolation digital input module, when the VCU _ OUTSign1 signal is high, the check _ VCU _ sign1 signal is high, and when the VCU _ OUTSign1 signal is low, the check _ VCU _ sign1 signal is low. Therefore, because the input signals of the vehicle controller are simulated into different types and different data, whether a fault exists or whether the output signals of the vehicle controller meet the design requirements of the whole vehicle can be judged by detecting the corresponding output signals.

The utility model discloses the advantage lies in can be according to the logic control signal output simulation electric automobile part signal that microprocessor unit sent, and this kind of control method can improve electric automobile vehicle control unit efficiency of software testing. The system and the method have the advantages that the research and development efficiency and the production efficiency are improved, the hardware-in-loop test structure is optimized, and the reliability and the flexibility of the system are improved.

It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.

Claims (6)

1. The utility model provides a testing arrangement of vehicle control unit which characterized in that: the system comprises a microprocessor unit, an analog feedback sensor output module, an analog PTC temperature sensor output module and a data communication module, wherein the analog feedback sensor output module is used for outputting a voltage and current signal to a vehicle control unit, the input end of the analog feedback sensor output module is connected with the output end of the microprocessor unit, and the output end of the analog feedback sensor output module is connected to the vehicle control unit; the PTC temperature sensor output module is used for outputting an analog temperature signal to the whole vehicle controller, and the input end of the PTC temperature sensor output module is connected with the microprocessor unit; the microprocessor unit is connected with the output end of the vehicle control unit through the data communication module; the input end of the microprocessor is connected with a human-computer interaction interface.

2. The testing device of the vehicle control unit according to claim 1, wherein: the data communication module comprises a CAN communication module and an isolation digital input module, and the microprocessor unit is connected with the whole vehicle controller through the CAN communication module and the isolation digital input module respectively.

3. The testing device of the vehicle control unit according to claim 1 or 2, wherein: the testing device also comprises a push-pull output module, and the input end of the push-pull output module is connected with the microprocessor unit.

4. The testing device of the vehicle control unit according to claim 2, wherein: the isolated digital input module includes an optocoupler.

5. The testing device of the vehicle control unit according to claim 2, wherein: the analog feedback sensor output module includes an analog-to-digital converter.

6. The testing device of the vehicle control unit according to claim 2, wherein: the output module of the analog PTC temperature sensor adopts a MAX5432 chip to output a temperature signal acquired when the analog whole vehicle controller works.

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