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针对目前航天技术应用产品常用信号采集方法存在的不足,设计了一种基于DCC(差分调理电路)的智能配电时序器信号采集方法。通过研究差分调理电路传输特性,分析差分调理电路在交流智能配电时序器和直流智能配电时序器不同情形下信号采集的应用情况,确立了基于差分调理电路的最优信号采集电路及采集编程算法。实际应用表明,采用差分调理电路的信号采集方式具有抑制共模,放大差模,抑制温漂,采集精度高,抗干扰能力强的优点。
Aiming at the shortcomings of the commonly used signal acquisition methods of aerospace technology application products, a signal acquisition method of intelligent power distribution sequencers based on DCC (Differential Conditioning Circuit) is designed. By investigating the transmission characteristics of the differential conditioning circuit and analyzing the application of the differential conditioning circuit under different situations of the AC intelligent power distribution sequencer and the DC intelligent power distribution sequencer, the optimal signal acquisition circuit based on the differential conditioning circuit and the acquisition programming algorithm. The practical application shows that the signal acquisition method using differential conditioning circuit has the advantages of suppressing common mode, amplifying differential mode, suppressing temperature drift, high acquisition accuracy and strong anti-interference ability.