Automobile instrument detection system based on STM32

Abstract

The invention relates to an automobile instrument detection system, and specifically relates to an automobile instrument detection system based on STM32. The detection system includes a microcontroller, a switching signal unit connected to the microcontroller, a bus unit, a PLC unit, a serial communication unit, a unit power supply unit, a storage unit, a relay control unit, a voltage acquisitionunit, a resistance network unit and a waveform generation / acquisition unit, wherein the switching signal unit, the bus unit, the PLC unit, the serial communication unit, the unit power supply unit, the storage unit, the relay control unit, the voltage acquisition unit, the resistance network unit and the waveform generation / acquisition unit are connected with the microcontroller. The microcontroller is connected to an upper computer through a serial port, and the switch signal unit includes a 74HC595, optocouplers TPL700 and a short circuit protection circuit, wherein the 74HC595 converts a serial control signal of the controller into a parallel signal, the 74HC595 is connected with multiple optocouplers TPL700 and the short circuit protection circuit is connected with the optocouplers TPL700. The automobile instrument detection system based on STM32 in the technical scheme of the invention has the characteristics of multiple signal types, high precision, strong anti-interference capability, convenience in programming and the like.

Description

technical field [0001] The invention relates to an automobile instrument detection system, in particular to an STM32-based automobile instrument detection system. Background technique [0002] The car combination meter is the window for the driver to obtain information about various execution and control devices during the driving process of the car. Before leaving the factory, the car combination meter needs to undergo a final quality inspection of the meter, and judge whether the quality of the meter is qualified according to the information displayed on the meter. The detection process of the automobile combination instrument is to send signals to the signal drive module through the host computer software, control it to generate the excitation signal when the car is running, input the excitation signal into the combination instrument, and use manual judgment or machine vision to judge whether the information displayed by the instrument is accurate. At present, there are m...

AI Technical Summary

Problems solved by technology

Compared with the automated visual inspection method, this separate manual inspection method has high production costs, low detection efficiency, and low precision.

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