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CAN bus test system and test method

A technology of CAN bus and testing method, which is applied in the field of vehicles, can solve the problems of low test accuracy and susceptibility to interference from human factors, and achieve the effects of high test accuracy, shortened development cycle, and improved test efficiency

Inactive Publication Date: 2016-03-16
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing test system has the following problems: it is easily disturbed by human factors, and the test accuracy is not high

Method used

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  • CAN bus test system and test method

Examples

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Comparison scheme
Effect test

no. 1 example

[0021] figure 1 It is a main frame diagram of the CAN bus test system provided by the first embodiment of the present invention. Please refer to figure 1 , The CAN bus test system includes: a host computer 101, a bus monitoring device 103, a program-controlled power supply 105, and a control unit 107.

[0022] Wherein, the upper computer 101 is connected with the program-controlled power supply 105 and the bus monitoring device 103, and is used to send the voltage control instruction simulating the voltage waveform output by the storage battery during the starting process of the automobile engine to the program-controlled power supply 105 according to the set voltage waveform.

[0023] Among them, specifically, the upper computer 101 can set the voltage waveform through the CAPL program of the CANoe software platform set in it, so as to simulate the change of the battery power supply voltage during the starting process of the car, so as to automatically control the programmab...

no. 2 example

[0047] Figure 4 It is a flowchart of the steps of the CAN bus testing method provided by the second embodiment of the present invention. Please refer to Figure 4 , the equipment required by the method includes a host computer, a bus monitoring device, a program-controlled power supply, and a control unit. The CAN bus testing method of this embodiment includes the following steps 401-409.

[0048] Step 401, according to the set voltage waveform, the upper computer sends a voltage control instruction simulating the voltage waveform output by the battery during the starting process of the automobile engine to the program-controlled power supply; wherein, preferably, the upper computer also adjusts multiple voltage parameters to set Determine the voltage waveform of different car models.

[0049] Step 403, the programmable power supply outputs the power supply voltage to the control unit according to the voltage control instruction sent by the host computer;

[0050] Step 405, ...

no. 3 example

[0059] Figure 5 It is a flow chart of the steps of the CAN bus testing method provided by the third embodiment of the present invention. Figure 5 is in Figure 4 improved on the basis of Figure 5 and Figure 4 The difference is that Figure 5 Each step of the Figure 4 Specific refinement steps for each step. Please refer to Figure 5 , the CAN bus testing method of the embodiment of the present invention may include the following steps 501-509.

[0060] Step 501, the host computer also sends a voltage control command to the programmable power supply according to the first preset time period in the set voltage waveform and the first voltage parameter, and records the sending time of the communication message;

[0061] Step 503, the programmable power supply outputs the first power supply voltage to the control unit according to the voltage control instruction sent by the host computer and keeps outputting the first power supply voltage for a first preset time period;...

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Abstract

Embodiments of the present invention disclose a CAN bus test system and test method, and belong to the field of vehicle technologies. The system comprises: an upper computer, a bus monitoring device, a programmable power supply, and a control unit, wherein the upper computer sends a voltage control command of a voltage waveform output by a battery in a simulated starting process of an automobile engine to the programmable power supply according to a set voltage waveform; the programmable power supply outputs a supply voltage to the control unit according to the voltage control command sent by the upper computer; the control unit determines whether to send a communication message to the CAN bus to perform transmission under the supply voltage output by the programmable power supply; the bus monitoring device monitors a communication message transmission situation in the CAN bus; and the upper computer determines, according to the communication message transmission situation monitored by the bus monitoring device, whether the CAN bus in the starting process of the automobile meets a communication requirement. According to the CAN bus test system and test method, operation is simple, accuracy is high, and costs can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a CAN bus test system and a test method. Background technique [0002] With the development of network technology, people's functional requirements for cars are becoming more and more diverse. In order to meet customer requirements and realize complex control functions, network bus technology has begun to be used in automobiles. The currently used network bus is mainly the CAN bus of the automotive electronic control unit (ECU). The CAN bus of the electronic control unit is completed, which carries a large amount of data and control information, so as to complete the realization of the vehicle function. [0003] Usually, the electronic control unit of the car is powered by the battery when the car engine is not started and the engine is started, and is powered by the engine after the engine is started. Since the voltage of the battery will jump during the starting process of t...

Claims

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Application Information

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IPC IPC(8): G06F11/22
Inventor 程艳阶任强张雁英钱三平李冠佳张亮
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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