基于PIC单片机的被动式红外报警系统的设计

本文介绍基于PIC单片机、无线收发技术和热释电红外传感器的被动式红外报警器的构成,以及各部分硬件的设计和工作原理。通过软、硬件两方面低功耗的设计,实现了该报警器既兼容开关设防和遥控设防,又具有现场警笛报警和无线报警功能,且功耗低。文中给出了系统硬件结构框图、软件流程并介绍了低系统功耗设计方法。该报警器具有功耗低、体积小等优点。经过多次测试,该报警器操作方便,工作可靠。

Design of passive infrared alarm system based on PIC single chip microcomputer

A passive infrared alarm system based on the technologies of PIC single chip microcomputer,radio transceiver and pyroelectric infrared sensor is introduced.Hardware designs and operation principle are presented.This alarm system has both switch and telecontrol,and can work on the mode of scene alarm and wireless alarm.Hardware frame,software flowchart of the system and new designs to deduce the power loss are demonstrated.The specialities are low power,compact and cheap cost,and practical tests prove its convenience and reliability.