Unlock instant, AI-driven research and patent intelligence for your innovation.

System for testing automobile instrument with controller area network (CAN) bus and testing method thereof

A technology of CAN bus and test system, which is applied in the field of test system of CAN bus automobile instrument, can solve the problems that the performance of automobile instrument cannot be fully reflected, and the test of CAN bus automobile instrument is single, so as to shorten the test cycle, maximize convenience and accuracy , The effect of reducing the cost of testing

Active Publication Date: 2011-04-27
HUAWEI TEHCHNOLOGIES CO LTD
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the CAN bus car instrument test is too single in the prior art and cannot fully reflect the performance of the car meter, and provides a test system and method capable of dynamically testing the CAN bus car meter to effectively detect the CAN bus car combination meter the goal of

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System for testing automobile instrument with controller area network (CAN) bus and testing method thereof
  • System for testing automobile instrument with controller area network (CAN) bus and testing method thereof
  • System for testing automobile instrument with controller area network (CAN) bus and testing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 4 As shown, the test system is initialized first;

[0040] Step S0001, the control module controls the timing module to reset and start timing;

[0041] Step S0002, the control module judges whether the timing time of the timing module has reached the vehicle speed message sending period T_SPD set in the system; if the judgment result is yes, the system enters step S0003, if the judgment result is no, the control module controls the timing module to continue timekeeping;

[0042] Step S0003, the control module controls the random variable random to randomly take a value from the value 1--100, and then the system enters step S0004;

[0043] Step S0004, the control module compares the value of the random variable random with the size of the internally set data variables data1 and data2; if data1≤random≤data2 is satisfied, the system enters step S0005; if the relationship data1≤random≤data2 is not satisfied, then The system enters step S006.

[0044] St...

Embodiment 2

[0048] Such as Figure 5 As shown, the test system is initialized first;

[0049] Step S0001, the control module controls the timing module to reset and start timing;

[0050] Step S0002, the control module judges whether the timing time of the timing module has reached the vehicle speed message sending period T_SPD set in the system; if the judgment result is yes, the system enters step S0003, if the judgment result is no, the control module controls the timing module to continue timekeeping;

[0051] Step S0003, the control module controls the random variable random to randomly take a value from the value 1--100, and then the system enters step S0004;

[0052] Step S0004, the control module compares the value of the random variable random with the size of the internally set data variables data1 and data2; if data1≤random≤data2 is satisfied, the system enters step S0005; if the relationship data1≤random≤data2 is not satisfied, then The system enters step S006.

[0053] St...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A system for testing an automobile instrument with a controller area network (CAN) bus comprises a singlechip and a CAN transceiver, wherein the singlechip comprises a control module, a transmitter module and a timing module; a memory module, the transmitter module and the timing module are respectively connected with the control module electrically; and the transmitter module is connected with the automobile instrument with the CAN bus by the CAN transceiver. The invention also provides a control method, comprising the following steps: the testing system is initialized; and according to the programs set in the control module, the control module controls the transmitter module to transmit speed messages to the automobile instrument with the CAN bus according to a set cycle and controls the timing module to time message transmission and count the variables including random, data1 and data2. In the technical scheme, the testing system transmits the successive and even complex communication messages to the CAN bus in a simulative manner, shortens the testing cycle of the automobile combination instrument with the CAN bus and effectively lowers the testing cost of the instrument.

Description

technical field [0001] The invention relates to a system and method for testing an automobile instrument, in particular to a testing system and a testing method for a CAN bus automobile instrument. Background technique [0002] As a communication protocol with advanced technology, strong real-time performance and high reliability, CAN (Controller Area Network) bus protocol has been widely used in various automatic control systems, especially in the field of automotive electronics It also has a good application prospect in electronic control modules and instruments. The introduction of CAN bus in the automotive instrument system makes the automotive instrument system have an open and easy-to-extend structure, and can digitally manage the separate instruments of the previous analog combination, which not only reduces the wiring harness of the automotive system, but also simplifies the instrumentation. The interface of the system improves the anti-interference of the system, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02H04L1/00
Inventor 张铭君
Owner HUAWEI TEHCHNOLOGIES CO LTD