Wireless Monitoring System of Vehicle Violation of Running Red Led Based on GPRS

Running red led is an important reason for the traffic accident at the intersection and it is helpful and necessary to monitor the violation behavior of running red led. In this paper, design method of the wireless monitoring system for the violation of running red led based on GPRS (general packet radio system) is discussed, and the configuration of its hardware and software is introduced. The whole system consists of the subsystems of the vehicle monitoring stations distributed at the road intersections and the remote control center. During the period of the red state of traffic light, the interruption procedures will be activated by the output signal of the magnetic loop sensors and the two the cameras will be triggered to capture three pictures to record the course of running red led. The functions of image compression, number plate recognition and etc. are realized subsequently. Then the data of the monitoring station serial number, violation time, compressed image and etc., will be written to the wireless modem of Motorola G20 through the serial interface and sent to the remote monitoring center through the GPRS network and the GGSN gateway. Integrating the technologies of sensor, number plate recognition and GPRS, the whole monitoring system stands up the trend of vehicle violation surveillance for running red led at the road intersection.