基于DSP的微波车流量检测系统设计与实现  

Design and Implementation of Microwave Traffic Flow Detection System Based on DSP

作　　者：陈良章[1] 郑纯[1] 薛伟[1] 余稳[1] 孙晓玮[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《交通与计算机》2008年第1期80-83,共4页Computer and Communications

摘　　要：根据车流量检测器具有精度高、易于安装和维护、全天候等特点,利用线性调频连续波(FM CW)雷达、中频处理和DSP完成了对道路车流量的高精度检测。提出了整个系统的解决方案、中频处理单元和以DSP为核心的信号处理方案,并对部分关键电路进行了阐述,给出了DSP数字信号处理软件流程。经过试验验证,系统对车流量的检测精度大于95%。Based on such characteristics of vehicle detector as high accuracy, convenient installation and maintenance, and working around the clock, the traffic flow was detected with high precision based on FMCW radar, IF process, and DSP. First, the whole system＇s solution was presented, as well as IF processing units, and digital signal processing unit at the core of DSP. Then, some of the key circuits were described, and the software process of DSP was presented. The experiments validate that the accuracy of the detector is higher than 95%.

关 键 词：智能交通系统 微波车流量检测器 数字信号处理 中频滤波 

分 类 号：TN957[电子电信—信号与信息处理]