Automobile OBD data acquisition system based on stm32 single-chip microcomputer

Abstract

The invention discloses an automobile OBD data acquisition system based on an stm32 single-chip microcomputer. The system comprises a PCB top plate, an STM single-chip microcomputer main body, a central processing module, a secondary power supply module, a data analysis module, a program storage module, a communication protocol module, a data acquisition module, a fault diagnosis module, a communication transmission module, a triaxial force sensor, a radio frequency transceiver, a radio frequency amplifier, a shielding cover, a USB interface, an upper transmission interface, an upper transmission joint, a lower transmission joint, a lower transmission interface, a PCB bottom plate, a primary power supply module, a pin joint, a box body, a housing, a signal filtering module, a fault indicating lamp, a lamp hole, an antenna plate, an upper pole piece, a lower pole piece, a wire hole and a positioning groove. According to the invention, an stm32 single-chip microcomputer is used as the MCU unit of an OBD intelligent box, so that the data processing capacity and the data acquisition capacity of the system are improved, the system obtains an interconnection function, the instant messaging requirement of the Internet of Vehicles is met, the market competitiveness of the system is improved, the abnormal value problem of data is avoided, and the accuracy of the data is improved.

Description

technical field [0001] The invention relates to the technical field of automobile OBD systems, in particular to an automobile OBD data acquisition system based on an stm32 single-chip microcomputer. Background technique [0002] OBD is the abbreviation of On-Board Diagnostics in English, and the Chinese translation is "On-Board Automatic Diagnosis System". With the continuous improvement of people's living standards in recent years, the automobile industry has also developed rapidly. As an entry point of the Internet of Vehicles, OBD appears frequently. At present, the industry mainly uses the OBD smart box as the carrier of the car OBD data acquisition system. [0003] However, most of the traditional OBD smart boxes have the following problems: First, only a simple MCU module is configured, the data processing capability is insufficient, the data collection capability is poor, and there is no interconnection function, which cannot meet the instant communication requiremen...

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Problems solved by technology

[0003] However, most of the traditional OBD smart boxes have the following problems: First, only a simple MCU module is configured, the data processing capability is insufficient, the data collection capability is poor, and there is no interconnection function, which cannot meet the instant communication requirements of the Internet of Vehicles. limited; second, there is no filtering and shielding processing for the signal, and it is easy to be interfered by the outside world during use, resulting in abnormal values ​​in the collected data, which reduces the accuracy of the data; third, there is no USB interface, which cannot Directly use the computer to upgrade the program, the software update is difficult, and it is not conducive to long-term use

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