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不同种类光电耦合器件(光耦)结构工艺对空间总剂量辐射的敏感性存在较大差异,故对其在航天器的使用应区别对待。文章分别对组成常见光耦的LED部分、光电耦合部分以及集成放大电路部分受电离总剂量辐射和位移损伤效应的影响进行分析,比较了光耦各个组成部分和不同工艺的光耦对辐射的敏感度。在地面辐照测试数据基础上,以3种典型光耦为原型,设计在轨验证电路,对器件在辐射环境下的长期工作情况进行了试验验证。结果表明,在适当的参数选择和合理的电路设计下,这些光耦能够满足低地球轨道航天领域的应用需求。
Different types of optocoupler (optocoupler) structure technology on the total radiation dose space radiation there is a big difference, so its use in the spacecraft should be treated differently. The article analyzes the influence of the total dose radiation and the displacement damage effect of the LED parts, the photoelectric coupling parts and the integrated amplifier circuit which make up the common optocouplers respectively, and compares the sensitivity of the optocouplers with different components and different processes of the optocouplers to the radiation degree. Based on the ground irradiation data, three kinds of typical optocouplers are used as the prototype to design the on-orbit verification circuit, and the long-term working conditions of the device in the radiation environment are tested. The results show that these optocouplers can meet the application requirements of low-Earth orbit space vehicles with proper parameter selection and reasonable circuit design.