Air pressure sensor testing method and testing system for brake system

Abstract

The invention relates to a gas pressure sensor test method for a braking system and a test system thereof. The test method comprises the following steps: calibrating the coefficient of a gas pressure sensor to acquire a calibration relation between the current gas pressure P and a current sensor signal voltage V corresponded AD port voltage value VAD, conducting gas inflating or gas discharge according to an expected gas pressure, and observing the current gas pressure, carrying out measuring when the expected gas pressure is reached and saving the measuring result. The test system includes: an upper PC human-computer interface, a lower computer unit and the gas pressure sensor. The lower computer unit is connected to the upper PC human-computer interface through a lower computer DSP system board and is connected to the gas pressure sensor through a conditioning circuit, which is formed by connection of an operational amplifier U1, an operational amplifier U2, a resistor R21, a resistor R22 and a capacitor C21. The test method provided by the invention has the advantages of simple and convenient operation, scientific and precise measurement, high measurement efficiency and good effect. The test system provided by the invention has the characteristics of simple and reasonable structural design, visual and precise testing and calibration, stable and reliable use, and high test efficiency.

Description

technical field [0001] The invention relates to the technical field of an air pressure sensor of an automobile brake system, in particular to a method for testing an air pressure sensor of a brake system and a test system thereof. Background technique [0002] According to incomplete statistics, in the traffic accidents caused by the problems of the vehicle itself, the traffic accidents caused by the failure of the braking system account for 45% of the total. The U.S. Federal Highway Transportation Safety Administration statistics on traffic accidents caused by non-human factors show that about one-third of road safety accidents are caused by vehicle braking system failure or poor braking. At present, most of the brake system research is the development and performance analysis of the brake system development platform. In the late 1990s, Japanese companies such as Toyota and Isuzu have begun to study the brake system development platform and achieved certain results. In rec...

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Problems solved by technology

[0004] The present invention aims to solve the problems that the relevant testing and calibration of the air pressure sensor of the existing brake system is not intuitive enough, accurate enough, and the testing is not simple enough, convenient and low in efficiency, and proposes a simple and convenient operation, intuitive and accurate testing, reliable testing and high efficiency. Air pressure sensor test method and test system of Gaode brake system

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