3、向单片机发出信号，系统向单片机发送中断请求，系统开始报警，直到车主自行关闭或者在10s内无异常自动关闭，从而提高汽车安全性。关键词：单片机；热释电红外传感器；防盗报警_______________________________________临沂大学2012届本科毕业论文______________________________________AbstractThe design takes the microcontroller as the control unit and uses the pyroelectric inf
4、rared sensor as the media to send a signal to the microcontroller to achieve the goal of the cab car anti-theft by detecting the situation of vehicle cab. Pyroelectric infrared sensor has the characteristics of low cost, stable performance, high sensitivity, anti-inter
5、ference ability and the infrared is not visible, so it has the advantage of good concealment in the area of infrared detection monitoring. The design also uses AT89C51 microcontroller, which has the characteristics of small volume, powerful, light weight , wide appli
6、cation and so on. This system works under the control of the system software. Once somebody who gets into the cab is seen, pyroelectric infrared sensors immediately sends a signal to the microcontroller, then the system sends an interruption request to the MCU, the sys
7、tem begins to alarm ,till the car owner shuts down or the car automatically shuts down by itself without exception in 10 seconds, thus achieve the goal of improving vehicle safety.Keywords:MCU;Pyroelectricinfraredsensor;Anti-theftalarm__________________________________
