新型商用被动式报警器的研制及改良

Development and Improvement of a New Commercial Passive Alarm

根据文献报道,人体所辐射红外线的中心波长为9~10μm,这不同于其他非生命体所辐射红外线的中心波长,同时也与其他非人类生命体的红外辐射有所区别。因此,可以此对人体运动进行识别、监控。根据这个原理,研究并设计出一种小巧的被动式红外报警器,通过红外传感器继电器的输出来检测人体运动,并触发报警。该系统操作简单,采用直流电池供电,用被动检测的方法保证,对人体运动进行有效检测,且功耗相对较低。对典型室内场景对红外传感器进行评估,剖析其存在的问题,并进行完善。结果表明,这款新型商用被动式报警器能够在外界干扰的情况下准确识别人体姿态,并作出相关反应。

According to the literature,the central wavelength of infrared radiation from human body is 9-10μm,which is different from the central wavelength of infrared radiation from other non-living bodies,and also different from the infrared radiation from other non-human living bodies.Therefore,it is possible to identify and monitor human movement.Based on this principle,a compact passive infrared alarm is researched and designed to detect human motion and trigger an alarm through the output of an infrared sensor relay.The system is simple to operate,powered by a DC battery,guaranteed by a passive detection method,effective detection of human motion,and relatively low power consumption.The infrared sensor is evaluated in a typical indoor scenario,its problems are dissected,and improvements are made.The results show that this new commercial passive alarm is able to accurately identify human posture in the presence of external interference and respond to it in a relevant way.