Step-in heat test method and system of instrument electric control system

Abstract

The invention discloses a step-in heat test method and system of an instrument electric control system. The method comprises that an infrared imager carries out infrared detection on a circuit board of the electric control system in the normal temperature environment to obtain a preliminary-detection temperature cloud atlas, and the preliminary-detection temperature cloud atlas is sent to a detection computer; a heat detection computer obtains a high temperature component in a high temperature position on the circuit board; a temperature collector on the high temperature component obtains temperature of the high temperature component during work in the normal temperature environment and other specific detection temperature environments, and the collected temperature values are sent to theheat detection computer; and the heat detection computer analyzes the work environment temperature, self temperature and work temperature threshold of each high temperature component, and thus, obtains fault component whose heat detection performance is unqualified from the high temperature components. Thus, the temperature of the electronic device of the electric control system when working at specific temperature can be rapidly and conveniently detected, and the heat detection precision is improved.

Description

technical field [0001] The invention relates to the field of thermal testing of electric control systems, in particular to a walk-in thermal testing method and system for electronic control systems of instruments. Background technique [0002] Automobiles, excavators, airplanes, ships, electric vehicles, and locomotives and motor vehicles used for rail transportation generally have electronic control systems, such as the electronic control system of automobiles. At present, the circuit board integration of electronic control systems is getting higher and higher. The power consumption is increasing, which will easily lead to excessive local temperature of the circuit, and the heat dissipation problem will become more and more serious. Overheating of components will cause the performance of the electronic control system to deteriorate or become unstable, and even cause the electronic control system to fail, directly affecting the reliability of electronic products. Therefore, ...

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Problems solved by technology

[0002] Automobiles, excavators, airplanes, ships, electric vehicles, and locomotives and motor vehicles used for rail transportation generally have electronic control systems, such as the electronic control system of automobiles. At present, the circuit board integration of electronic control systems is getting higher and higher. The power consumption is increasing, which will easily lead to excessive local temperature of the circuit, and the heat dissipation problem will become more and more serious. Overheating of components will cause the performance of the electronic control system to deteriorate or become unstable, and even cause the electronic control system to fail, directly affecting the reliability of electronic products. Therefore, as the carrier of components, the circuit board of the electronic control system must have good heat dissipation performance

[0003] Due to the complexity of the electronic circuit of the electronic control system, unreasonable problems in the design and layout of the circuit can easily lead to abnormal heat dissipation. Therefore, when the electronic control system leaves the factory, it is necessary to ensure that the circuit layout of the electronic control system is reasonable and improve the heat dissipation performance.

Most of the existing thermal detection methods directly use temperature sensors to detect the temperature value of each component when it is working, but it is too time-consuming and laborious to detect each component of the electronic control system one by one by using this detection method, and the detected The temperature parameters are only in the normal temperature state, and the temperature resistance of the parts cannot be accurately judged, and the thermal detection effect cannot reach the best state

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