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为解决黑暗环境中开启照明装置所带来的不便和不安全,设计了一种基于热释电传感器的人体热辐射检测电路。阐述了热释电红外传感器的结构,设计了包含有前置放大电路、电压比较电路、延时电路和电源电路组成的红外检测系统,分析了检测电路的工作原理,提出了检测电路的安装要求。所设计的电路性能可靠、成本低、易于安装,适用于居民家庭、宾馆走廊、学生宿舍、教学楼道等场合。
In order to solve the inconvenience and insecurity caused by turning on the lighting device in dark environment, a human body radiation detection circuit based on pyroelectric sensor was designed. The structure of the pyroelectric infrared sensor is expounded. The infrared detection system including the preamplifier circuit, the voltage comparison circuit, the delay circuit and the power supply circuit is designed. The working principle of the detection circuit is analyzed, and the installation requirements of the detection circuit . The circuit design is reliable, low cost, easy to install, suitable for residential families, hotel corridors, dormitories, teaching corridors and other occasions.