基于DSP的测速雷达数据采集和处理
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摘要
近几年随着我国公路事业的蓬勃发展和汽车保有量的飞速增长,电子警察等高科技设备不断涌现在人们的视野当中,但是国内现有的电子警察测速或超速抓拍设备存在速度检测准确率不高,图片抓拍有效率太低,照片模糊不清晰等问题,影响了违章取证的公平和公正性。同时超速抓拍的方向固定只能针对来车目标,夜间配合闪光灯使用时强光会对迎面车辆的驾驶员视觉造成影响,诱发交通事故影响行车安全。
本文的主要内容是研究设计一种有效的超速目标相关检测方法,即通过对双通道连续波多普勒测速雷达的数据采集和处理后,实现从不同的方向对目标速度的准确检测,在锁定目标后及时自动触发图像采集设备,使抓拍到的图片有效率高,图片中车牌号码清晰,解决现有电子警察测速设备普遍存在的问题,特别是解决夜间使用闪光灯可以从车尾方向抓拍的问题。
设计有效的超速目标相关检测方法,首先根据双通道连续波多普勒测速雷达通道信号的特性,建立一个用于速度检测系统的Matlab仿真模型,完成模拟数据输入、噪声处理、频谱变换分析和目标数据相关等检测计算方法的工作,实现对运动目标的行驶速度和运动方向测量的仿真,检验这种测速方法的可能性和准确性。利用已经建立的仿真模型在电子警察设备中设计一个基于DSP为核心的雷达控制系统,用来采集雷达信号,设定工作状态参数,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。同时要求雷达控制系统体积小,功耗低,性价比高和工作可靠性高。
完成设计后,对系统设备进行现场的实车试验和调试,使电子警察系统可以对超速目标进行不同方向检测和抓拍,具有超速目标检测有效率高、速度检测精度高、抓拍图片的车牌号码识别率高、夜间配合闪光灯使用效果理想等优点,并检验系统工作的稳定性,最终完成对整个系统软硬件的测试,检测结果理想达到了相关的标准规范和技术要求。
With the vigorous development of our traffic condition and the rapid-growing preserve of automobile,many high-tech equipments such as electron police are emerging in public gradually in recent years.However, there are many problems as the low velocity accuracy, the low efficiency and the blurring of images in the domestic speed-measuring and overspeed-snapshotting equipments now, which affects the fair and balance of discovery on regulation violation. At the same time, the direction of overspeed snapshotting is fixed, it can only aim at the incoming vehicles with flash lamp at night. The intense flash light will have impact on the drivers, which will induce traffic accidences and influence the traffic safety.
The main content of this article is about studying and designing a effective correlation detection method to measure the overspeed targets,namely through the acquisiton and processing of the double-channel CW Doppler speed radar data to realize the accurate measure of the vehicle’s velocity from different directions. Simultaneously after catching the target, it can automatically trigger the image acquisition equipment to make the car license number in picture clear ,solving the widespread problems among the e-police speed measuring equipments, especially, it solves the problem of snapshotting with flash lamp from the rear at night.
To design the effective method of measuring overspeed, firstly we should establish a Matalab simulated model according to the characteristics of the signals of the Doppler speed radar, finish the input of the simulated data, the processing of the noise, the analysis of the spectrum transformation and some other tasks of target data measurement and calculation, achieving the measuring simulate of the vehicle’s moving speed and direction ,and examine its possibility and accuracy.By the simulated model have established, we design a radar control system based on DSP in the e-police system to acquire the radar signals, set working condition patameter, examine the overspeed vehicle automatically and send the information of the overseeding condition and signal promptly to trigger image acquisition equipment to snapshot useful photo. Also the radar control system should be with tiny size, low power, high cost performance and high working reliability.
After finishing the design, we will experiment and debug the system in real road condition and make the electronic police system measure the overspeed vehicle from different direction to prove its high efficiency, high accuracy, effective snapshoting of car license number and its ideal condition of using with flash at night.Then examine its stability. Finally finish the examination of software and hardware in the whole system. The ideal result achieves the standard regulations and the technical specifications related.
本文的主要内容是研究设计一种有效的超速目标相关检测方法,即通过对双通道连续波多普勒测速雷达的数据采集和处理后,实现从不同的方向对目标速度的准确检测,在锁定目标后及时自动触发图像采集设备,使抓拍到的图片有效率高,图片中车牌号码清晰,解决现有电子警察测速设备普遍存在的问题,特别是解决夜间使用闪光灯可以从车尾方向抓拍的问题。
设计有效的超速目标相关检测方法,首先根据双通道连续波多普勒测速雷达通道信号的特性,建立一个用于速度检测系统的Matlab仿真模型,完成模拟数据输入、噪声处理、频谱变换分析和目标数据相关等检测计算方法的工作,实现对运动目标的行驶速度和运动方向测量的仿真,检验这种测速方法的可能性和准确性。利用已经建立的仿真模型在电子警察设备中设计一个基于DSP为核心的雷达控制系统,用来采集雷达信号,设定工作状态参数,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。同时要求雷达控制系统体积小,功耗低,性价比高和工作可靠性高。
完成设计后,对系统设备进行现场的实车试验和调试,使电子警察系统可以对超速目标进行不同方向检测和抓拍,具有超速目标检测有效率高、速度检测精度高、抓拍图片的车牌号码识别率高、夜间配合闪光灯使用效果理想等优点,并检验系统工作的稳定性,最终完成对整个系统软硬件的测试,检测结果理想达到了相关的标准规范和技术要求。
With the vigorous development of our traffic condition and the rapid-growing preserve of automobile,many high-tech equipments such as electron police are emerging in public gradually in recent years.However, there are many problems as the low velocity accuracy, the low efficiency and the blurring of images in the domestic speed-measuring and overspeed-snapshotting equipments now, which affects the fair and balance of discovery on regulation violation. At the same time, the direction of overspeed snapshotting is fixed, it can only aim at the incoming vehicles with flash lamp at night. The intense flash light will have impact on the drivers, which will induce traffic accidences and influence the traffic safety.
The main content of this article is about studying and designing a effective correlation detection method to measure the overspeed targets,namely through the acquisiton and processing of the double-channel CW Doppler speed radar data to realize the accurate measure of the vehicle’s velocity from different directions. Simultaneously after catching the target, it can automatically trigger the image acquisition equipment to make the car license number in picture clear ,solving the widespread problems among the e-police speed measuring equipments, especially, it solves the problem of snapshotting with flash lamp from the rear at night.
To design the effective method of measuring overspeed, firstly we should establish a Matalab simulated model according to the characteristics of the signals of the Doppler speed radar, finish the input of the simulated data, the processing of the noise, the analysis of the spectrum transformation and some other tasks of target data measurement and calculation, achieving the measuring simulate of the vehicle’s moving speed and direction ,and examine its possibility and accuracy.By the simulated model have established, we design a radar control system based on DSP in the e-police system to acquire the radar signals, set working condition patameter, examine the overspeed vehicle automatically and send the information of the overseeding condition and signal promptly to trigger image acquisition equipment to snapshot useful photo. Also the radar control system should be with tiny size, low power, high cost performance and high working reliability.
After finishing the design, we will experiment and debug the system in real road condition and make the electronic police system measure the overspeed vehicle from different direction to prove its high efficiency, high accuracy, effective snapshoting of car license number and its ideal condition of using with flash at night.Then examine its stability. Finally finish the examination of software and hardware in the whole system. The ideal result achieves the standard regulations and the technical specifications related.
引文
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2.孙朝云.现代道路交通测试技术-原理与应用[M].北京:人民交通出版社,2000
3.孙巍.关于移动电子警察性能评价指标的探讨[EB/OL].http://www.ctstc.org.cn/w z.aspx?id=493,2006-09-28
4.安福东.机动车的几种测速方式原理及性能的分析比较[J].警察技术,2003,(3):33-35
5.李志强,王志云,薛周成.利用固定周数测时法测定目标速度[J].军械工程学院学报,2006,12(2):28-31
6.陈亮,蒋国平.DSP在交通测速雷达中的应用[J].传感器技术,2003,22(7):65-67
7.邹彦.DSP原理与应用[M].北京:电子工业出版社,2005
8.TMS320F2810,TMS320F2811,TMS320F2812,TMS320C2810,TMS320C2811,TMS320C2812 Digital Signal Processors Data Manual[R].Texas Instruments,April 2001 -Revised December 2003
9.合众达SEED 2006年DSP+FPGA培训讲义[R],2005
10.周晶晶.雷达测速仪数字信号处理系统的设计[D]:[硕士论文].西安:西北工业大学,2006
11.Ramzi Abou-Jaoude,Martin Grace.Test Systems for Automotive Radar[C].VTC2000,May,2000:492-495
12.丁鹭飞.雷达原理[M].西安:西北电讯工程学院出版社,1984
13.M I Skolink.Introduction to Radar Systems[M].McGram-Hill Book Co,1980
14.张明友,汪学刚.雷达系统[M].北京:电子工业出版社,2006
15.向敬成,张明友.雷达系统[M].北京:电子工业出版社,2001
16.贾文超,白昱,任利晔,王世荣.基于DSP处理器的多普勒雷达系统设计[J].长春工业大学学报(自然科学版),2007,28(1):70-73
17.Cem Unsal,Rahul Sukthankar,Chuck Thorpe.Functional sensor modeling for Automated Highway Systems simulations[C].SPIE International Symposium on Intelligent Systems & Advanced Manufacturing Technical Conference on Intelligent TransportationSystems,1997
18.R.J.C.Bultitude,T.J.Willink,M.H.A.J.Herben,etc.Detection of Changes in the Spectra of Measured CW Mobile Radio Data for Space Wave Modelling Applications[J].2007
19.Jukka Ruoskanen,PekkaEskelinen,Heikki Heikkila.Millimeter Wave Radar with Clutter Measurements[J].IEEE AES Systems Magazine,2003,10:19-23
20.Masahiro Watanabe,Katsuzi Okazaki,Tadamma Fukae,etc.An Obstacle Sensing Radar System for a Railway Crossing Application:A 60GHz Millimeter Wave Spread Spectrum Radar[J].IEEE MTT-S Digest,2002:791-794
21.靳希,杨尔滨,赵玲.信号处理原理与应用[M].北京:清华大学出版社,2004
22.郑君里.信号与系统(上下册)[M].北京:高等教育出版社,2000
23.陈恒亮,蒋勇.基于DSP的实数FFT的算法研究与实现[J].动力学与控制学报,2005,3(2):50-53
24. Merrill I.Skolnik.雷达系统导论(第三版)[M].北京:电子工业出版社,2006
25.戈稳.雷达接收机技术[M].北京:电子工业出版社,2005
26.赵迎辉.基于DSP的数据采集与处理系统的设计与实现[D]:[硕士论文].成都:西南交通大学,2006
27.王元中.基于AD9481芯片的毫米波雷达信号采样系统设计[J].电子元器件应用,2006,09:68-71
28.祁才君.数字信号处理技术的算法分析与应用[M].北京:机械工业出版社,2005
29.楼顺天.基于MATLAB7.x的系统分析与设计[M].西安:西安电子科技大学出版社,2005
30.杨莘元,李争,查品德.毫米波雷达回波信号去噪系统设计[J].应用科技,2006,33(4):16-17,26
31.马玲,蔡征宇,程风雷,朱洪.毫米波测速雷达的测速原理[J].弹道学报,2003,15(4):87-91
32.黄默,龙腾.多路高速数据采集系统设计与分析[J].弹箭与制导学报,2004,24(4):82-84
33.丛玉良,王宏志.数字信号处理原理及其MATLAB实现[M].北京:电子工业出版社,2005
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