被动红外运动探测器的技术是众所周知的。这种探测器一般包括一个小的外壳和一个用于将红外光聚焦在红外传感元件上的透镜。传感元件大多为热释电型,当响应到照射在其上的红外辐射的变化时,它便会产生小的但可以探测到的电压。一鉴别电路监视该传感元件的输出信号,如果传感元件的输出信号中存在某些 The technology of passive infrared motion detectors is well known. Such detectors typically include a small housing and a lens for focusing the infrared light on the infrared sensing element. The sensing element is mostly pyroelectric, which generates a small but detectable voltage when it responds to changes in the infrared radiation impinging on it. A discriminating circuit monitors the output signal of the sensing element, and if some of the output signals of the sensing element exist