一种GSM和红外传感器电路的干扰抑制方法

An interference suppression method for GSM and infrared sensor circuits

针对GSM和热释电红外传感器电路中存在的干扰现象,分析干扰存在的原因,提出一种基于双路传感器的软硬件综合方案。屏蔽一路传感器的检测通道,通过微控制器对两路输出信号进行读取,正确区分干扰状态与正常状态,并有针对性地做出处理。采用该方案有效地抑制GSM引发的干扰,同时不影响系统原有功能,取得显著的使用效果。

For the interference phenomena in GSM and pyroelectric infrared sensor circuits,we analyzed the causes of interference and proposed a hardware and software integrated scheme based on two-way sensor.Shielding the detection channel of one sensor and reading two output signals through a microcontroller,the interference state and normal state are distinguished correctly and corresponding processing is made.The scheme effectively suppressed the interference caused by GSM,and does not affect the original functions of the system,and achieves remarkable results.