基于RISC处理器的实时交通计测系统

Real Time Traffic Flow Measuring System Based on RISC Processor

目的研究交通流的实时测量，测量车辆台数、速度等基本交通参数，以期为交通部门提供必要的交通流参数统计量．方法用差分方式对交通流进行实时图像处理，用精简指令集计算机（ＲＩＳＣ）作为主处理器，运用其高速数据处理能力进行系统的实时化和实用化研究．结果完成了实时交通流计测的实验装置，并且进行了图像处理软件算法的设计和调试．结论实际道路的交通测量证明，测量精度在９５％以上．系统可以适应环境光的突变和渐变的影响，在多种环境下均可很好地工作．

Aim To study a real time traffic flow measurement system providing necessary statistics of traffic flow parameters for traffic departments through measuring vehicle number, velocity and other traffic parameters.Methods\ The real time traffic flow measurement was processed through image difference method. Because of its capability for data processing at high speed, the RISC (reduced instruction set computer) was used to carry out real time and practical research on the whole system. Results\ Experiment devices of real time traffic flow measurement was developed and the practical algorithm of image processing was designed and debugged. Conclusion\ In practical traffic flow measurement, the precision of measuring vehicle number is over 95%. The system work robustly under various conditions, it can automatically cope with the gradual and sudden changes of the environment light.