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Automobile fault diagnosis system based on Bluetooth technology

A technology of automobile fault diagnosis system, which is applied in the field of sensor measurement and control, can solve the problems of inflexible and convenient use, and achieve the effect of friendly display interface, flexible use and strong redevelopment

Inactive Publication Date: 2014-07-30
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional fault diagnosis equipment needs to connect the cable to the CAN bus interface of the car, which is not flexible and convenient to use

Method used

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  • Automobile fault diagnosis system based on Bluetooth technology
  • Automobile fault diagnosis system based on Bluetooth technology

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Experimental program
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Embodiment

[0016] The present invention is an automobile fault diagnosis system based on bluetooth technology, comprising the following parts: a CAN-bluetooth conversion module, a power supply module, a bluetooth adapter and a PC display program.

[0017] The CAN end of the CAN-Bluetooth conversion module is connected to the CAN bus interface of the vehicle through a twisted pair CAN line, and the Bluetooth end is connected to a PC connected with a Bluetooth adapter through Bluetooth.

[0018] CAN-Bluetooth conversion module realizes mutual conversion between CAN communication protocol and Bluetooth communication protocol, supports two data formats of standard frame and extended frame, compatible with Bluetooth 2.1+EDR specification, supports Bluetooth serial protocol, CAN interface is standard DB9 interface, CAN communication The baud rate is set to 250Kbps.

[0019] The power module supports 24V vehicle voltage and 220V AC voltage, and 220V AC voltage is used in this embodiment.

[00...

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PUM

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Abstract

The invention relates to an automobile fault diagnosis system based on the Bluetooth technology, and belongs to the technical field of the sensing measurement and control technology. The automobile fault diagnosis system aims at conducting fault diagnosis on automobiles by connecting an industrial field bus CANBUS to a Bluetooth wireless network and inquiring about the device working state and the fault code in the CAN bus through a wireless transmission method. By means of the CAN bus and the Bluetooth technology, a software program is developed on the basis of the Labview, the trouble caused by traditional fault diagnosis on-site wiring is eliminated, and the automobile fault diagnosis system is convenient to carry, flexible to use, friendly in display interface and high in redevelopment performance.

Description

technical field [0001] The invention relates to an automobile fault diagnosis system based on bluetooth technology, which belongs to the technical field of sensing, measurement and control. Background technique [0002] In automotive electronics technology, vehicle safety performance is a part that cannot be ignored. How to use reasonable and effective methods to timely and correctly diagnose various abnormal states or fault states, eliminate faults, and improve the reliability of equipment operation , Safety, and minimizing failure losses are of great significance in terms of technology, economy and society. [0003] The ECU of the car generally has fault self-diagnosis and protection functions. When the system fails, it can also automatically record the fault code in the RAM and use protective measures to read the replacement program from the above-mentioned inherent program to maintain the engine running. At present, the common domestic automobile fault diagnosis methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
Inventor 田颖张欣卢丹耿聪
Owner BEIJING JIAOTONG UNIV
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