基于波段开关的信号控制与BIT电路设计

Signal-control and BIT Circuitry Based on Wave-band Switch

摘要:

为了提高飞控计算机导通检查和绝缘测试时的安全性和可靠性；通过研究一刀多掷波段开关的特点和电路控制规律,以及飞控计算机导通检查和绝缘测试需求,提出一种基于波段开关组合使用实现多测量通道信号转换控制的电路设计方案,同时提出一种结合波段开关特点的机内测试(BIT)电路设计方法；采用上述方案制作了具体的实体电路,经实验室测试:该电路设计可通过两个波段开关同时实现信号分配和“自检”,提高了自检效率;电路简洁,操作方便,自检操作和测试操作基本一致,操作过程直观性强,从一定意义上讲,实现了“在线”自检；经实际应用验证,该电路设计方案可显著提高系统的测试和诊断能力,具有较好的实际应用价值。

Abstract:

In order to enhancing the measurement security and the reliability of the testing course, a circuit design project about how to control and select many Signal measure channels based on the Wave-band Switch and a kind of Built-in Test(BIT)method is put forward in the pape,by studying the characteristics of the wave-band switch,the controlling rules and the test requirements. There are also some application examples about which in the paper. The test results of the circuit were:(1) having realized signal assigning and having a higher self-check efficiency just by two wave-band switch, (2)making the testing operation simple and direct, (3)making the self-check operation simple just like to finish a testing operation and to enhance the operation visibility,(4) having realized the online self-check in some sense. It is validated that the circuit design project can greatly improve the testability and diagnosis capability of the system and has better of actual application value.