电连接器腐蚀失效对信号传输的影响

Impact of Electrical Connector Corrosion Failure on Signal Transmission

针对两栖装甲装备电连接器腐蚀失效导致的未发现故障(NFF)问题,从理论分析与电路仿真两个层面研究了腐蚀失效对信号传输的影响。分析了盐雾环境下电连接器的腐蚀失效机制,建立了腐蚀电连接器的电接触阻抗模型和电路模型,分析了腐蚀失效状态下的电路特性,通过对不同阻抗值下的电路仿真,得出了腐蚀失效对信号传输的影响规律。研究表明,电连接器腐蚀失效形成电接触阻抗,导致高频信号的传输产生失真。接触电阻的增加使信号波形幅度衰减甚至产生错误,而在一定范围内,接触电容的存在为高频信号提供通路,缓解了高频信号的失真。

In order to solve the problem of NFF （No-Faults-Found） caused by the electrical connector corrosion failure of an amphibious armored equipment, this paper studies the impact of the electrical connector corrosion failure on the signal transmission based on the principle analysis and the circuit simulation. The corrosion failure mechanism of the electrical connector in a salt spray environment is analyzed. The electrical contact impedance model and the circuit of the corrosive connector are established and the circuit characteristics in the corrosive failure state are analyzed. The impact of the corrosive failure on the signal transmission is studied by simulating the circuit with different impedance values. The results show that the electrical contact impedance formed by the corrosion failure of the electrical connector will lead to the transmission distortion of high frequency signals. The increase of the contact resistance reduces the amplitude of the signal wave and even completely distorts the signal. But in the limited scope, the presence of the contact capacitor provides a pathway for high frequency signals and reduces their distortion.