| 许振晓,郁大照,刘琦.岛礁环境下航空电连接器的腐蚀及其对信号传输的影响[J].装备环境工程,2023,20(4):48-55. XU Zhen-xiao,YU Da-zhao,LIU Qi.Corrosion of Avionics Connectors in Reef Environment and Its Effect on Signal Transmission[J].Equipment Environmental Engineering,2023,20(4):48-55. |
| 岛礁环境下航空电连接器的腐蚀及其对信号传输的影响 |
| Corrosion of Avionics Connectors in Reef Environment and Its Effect on Signal Transmission |
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| DOI：10.7643/issn.1672-9242.2023.04.007 |
| 中文关键词: 岛礁环境 电连接器 腐蚀 接触电阻 电接触模型 信号传输中图分类号:TG172.2 V252 文献标识码:A 文章编号:1672-9242(2023)04-0048-08 |
| 英文关键词:reef environment avionics connectors corrosion contact resistance electrical contact model signal transmission |
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| 中文摘要: |
| 目的 通过腐蚀加速试验，研究航空电连接器在某岛礁环境下的腐蚀特点和规律，并在此基础上，进一步研究航空电连接器腐蚀后对信号传输的影响。方法 根据该岛礁环境特点，设计腐蚀加速试验环境谱，基于此环境谱开展腐蚀加速试验，观察不同试验周期航空电连接器的腐蚀形貌，测量其接触电阻，研究腐蚀机理。然后设计电路，测量方波信号通过不同腐蚀程度电连接器的波形特征，通过对比分析研究腐蚀对信号传输的影响。结果 5个腐蚀循环周期后，电连接器插针表面开始出现微孔，接触电阻位于3~11 mΩ；10个周期后，插针表面微孔数量增多，且坑蚀变深变大，接触电阻位于7~19 mΩ；15个周期后，插针表面部分镀金层脱落，接触电阻位于15~36 mΩ。电连接器腐蚀程度越深，信号相位差、上升时间和过冲的测量值就越大；信号频率增加，这3个测量参数也相应变大。结论 盐雾和交变湿热加电应力环境对航空电连接器接触表面腐蚀作用明显。潮湿盐雾侵入电连接器内部是导致接触电阻升高的直接原因。接触电阻并不能完全反映出腐蚀对信号传输的影响。当接触电阻较小时，电连接器腐蚀程度越大，信号失真就越明显；信号频率越高，信号失真越明显。 |
| 英文摘要: |
| The work aims to study the corrosion characteristics and laws of avionics connectors in the reef environment of the South China Sea through the accelerated corrosion test and on this basis, explore the effect of corroded avionics connectors on signal transmission. According to the reel environment characteristics of the South China Sea, the environmental spectrum of accelerated corrosion test was designed. Based on this environmental spectrum, the accelerated corrosion test was carried out to observe the corrosion morphology of avionics connectors in different test cycles, measure their contact resistance, and study the corrosion mechanism. Then, the circuit was designed to measure the waveform characteristics of square wave signal passing through avionics connectors with different degrees of corrosion, and the effect of corrosion on signal transmission was studied through comparative analysis. After 5 corrosion cycles, micro holes began to appear on the pin surface of the avionics connectors, and the contact resistance was between 3 and 11 mΩ. After 10 cycles, the number of micro holes on the pin surface and the pit corrosion depth both increased, and the contact resistance was between 7 and 19 mΩ. After 15 cycles, part of the gold coating on the pin surface fell off, and the contact resistance was between 15 and 36 mΩ. The deeper the corrosion degree of the avionics connectors, the greater the measured value of the signal phase difference, rise time and overshoot. As the signal frequency increased, these three measurement parameters also increased correspondingly. Salt spray and alternating damp heat stress environment have obvious corrosion effects on the contact surface of avionics connectors. Wet salt mist invading the interior of the avionics connectors is the direct cause of the increase in contact resistance. Contact resistance cannot fully reflect the effect of corrosion on signal transmission. When the contact resistance is small, the greater the corrosion degree of the avionics connectors, the more obvious the signal distortion and the higher the signal frequency, the more obvious the signal distortion. |
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