摘要
介绍了热释红外传感器的工作原理,给出了一种热释电红外报警器的结构原理及其应用电路。依据接收人体红外光谱而工作,当人体在其接收范围内活动,热释电红外探头探测到红外信号并对接收到的微弱信号加以放大,然后驱动继电器,自动开启负载,人不离开且在活动,报警持续工作,直至人离开后延时关闭报警,并给出了其完整的硬件电路设计方案与实现方法及节能目的。
The operating principle of pyroelectric infrared sensor is given in this paper and also the application principles and the structure circuit of a pyroelectric infrared detector. It is worked based on the IR of human body and, when the human body is in its scope of activities, the pyroelectric infrared probe detects the infrared signals and amplifies the weak signal that received, and then drives the relay, automatic opens the load. If the people do not leave and still in activities, the alarm continues to work until the departure of people and delay the closure of alarm. The article also gives its complete hardware circuit design, the methods of implernen- tation and the energy-saving purpose.
出处
《山西电子技术》
2009年第1期16-17,共2页
Shanxi Electronic Technology
关键词
快思逻辑
菲涅尔透镜
红外报警
fast logical thinking
Fresnd lens
infrared alarm
