具有GPRS通讯的FMCW雷达道路运动目标探测系统

FMCW Radar Moving Road Target Detection System with GPRS Communication

针对传统路面探测设备耗费人力、设备体积大、成本高等缺点,设计了利用微波、GPRS和红外模块组成的运动目标探测系统,实现了远程无人监控道路运动目标的目的。其中微波探测模块采用了K-LC1a雷达收发器,利用三角波作为调制信号产生差频信号,设计了三角波调制电路、差频信号的信号处理放大滤波电路。同时利用被动式热释电红外传感器设计了红外放大处理电路,作为预警信号传输给单片机。使用GPRS模块通过TCP/IP协议将雷达测到的运动目标数据传输给服务器端,并在页面上显示报警信息。基于STM32F103单片机设计了探测识别外部信号的软件系统,将红外信号作为预警信号,在预警后开启微波模块,减少了系统功耗,为远程监控提供更长时间的支持。

In view of the disadvantages of traditional road detection equipment, such as high labour cost,large volume and high cost,a moving target detection system composed of microwave,GPRS and infrared modules was designed to achieve the goal of remote monitoring of the road target. The microwave detection module used the K-LCla radar transceiver,and the triangle wave was used as the modulation signal to generate the differential frequency signal. A passive pyroeleetrie in- frared sensor was used to design the infrared amplification processing circuit,which was transmitted to the mieroeontroller as an early warning signal. The GPRS module was used to transmit the moving target data from radar to the server side through the TCP/IP protocol,and displayed the alarm information on the page. Based on STM32F103 MCU ,a software system for detecting and identifying external signals was designed. The infrared signal was used as an early warning signal, and the microwave module will turn on after early warning,which reduced the power consumption of the system and provided longer support for remote monitoring.