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本系统是以单片机C语言程序设计为基础,采用51系列单片机构成的主从式多机系统通讯协议以及热释电红外(PIR)传感器为检测装置,来实现对机箱内的监控与中心控制器的通讯。其中热释电红外(PIR)传感器用来检测机箱内是否有被盗,并通过单片机将所检测到的信息发送给中心控制单片机,从而达到监控和报警的目的。其中51单片机的通讯结构采用RS-232串行标准总线进行数据传输,此种通信方式:成本低,传输距离远,抗干扰能力强。能很好的使用于计算机数量多,管理难度大的学校、机关以及大型网吧中。
The system is based on the single-chip C language programming, using 51 series of single-chip microcomputer consisting of master-slave multi-machine system communication protocol and pyroelectric infrared (PIR) sensor for the detection device to achieve the chassis monitoring and central controller Communication. Which pyroelectric infrared (PIR) sensor used to detect the chassis is stolen, and through the microcontroller to detect the information sent to the central control microcontroller, so as to achieve the purpose of monitoring and alarm. One of the 51 SCM communication structure using RS-232 serial standard bus for data transmission, this communication: low cost, long transmission distance, anti-interference ability. Can be well used in a large number of computers, difficult to manage schools, institutions and large Internet cafes.