CAJ | 학술논문

为了改善雷达测速仪触发相机的反应时间,提高测速精度,设计了一种以DSP芯片TMS320F28335为核心的雷达测速系统,通过DSP采集雷达信号,对车辆运动产生的多普勒频率进行复数傅里叶变换并进行频谱分析,利用目标相关算法自动检测超速目标,发送目标超速状态信息和及时的触发信号,触发图片采集设备抓拍到有效的图片。实验结果分析,触发相机反应时间大约90 ms,测速精度小于1 km/h。
위료개선뢰체측속의촉발상궤적반응시간,제고측속정도,설계료일충이DSP심편TMS320F28335위핵심적뢰체측속계통,통과DSP채집뢰체신호,대차량운동산생적다보륵빈솔진행복수부리협변환병진행빈보분석,이용목표상관산법자동검측초속목표,발송목표초속상태신식화급시적촉발신호,촉발도편채집설비조박도유효적도편。실험결과분석,촉발상궤반응시간대약90 ms,측속정도소우1 km/h。
In order to improve the response time and the mearuring accuracy of the radar speed measurement,a radar speed measurement system is designed based on DSP-F28335. DSP acquires the radar signals,carries out complex fourier transform(CFFT)on Doppler frequency caused by vehicles movement,and then analyses the spectrum. In the process of system operation, the system uses target-correlation algorithm to detect over speed vehicle automatically, sends the information of the over speeding and triggers signal to trigger image acquisition equipment to get useful photo. By analysing of experimental results,the response time is about 90 ms,speed measuring precision is less than 1 km/h.