基于FMCW模式的微波車輛檢測算法研究及軟件實(shí)現(xiàn)
[Abstract]:Microwave vehicle detector has the advantages of easy installation and maintenance, all-weather operation, strong detection ability, and has a broad application prospect. In this paper, the microwave vehicle detector in FM CW (Frequency Modulation Continuous wave mode is taken as the object. The basic principle, system implementation, algorithm design and so on are studied. Firstly, the basic theory of FMCW microwave vehicle detection technology is introduced. This paper analyzes the ranging principle of microwave vehicle detector, establishes the mathematical model of if signal of triangle wave modulation in ideal condition, introduces the FFT operation and window function commonly used, and discusses the interference existing in the realization of the system. In addition, in view of the clutter interference which may exist in the practical application environment, the basic principle of improving the detection accuracy of the double slope triangular wave modulation signal is discussed in this paper. Secondly, the FMCW mode microwave vehicle detector is implemented in this paper. In this paper, IVM-297 sensor is chosen as microwave transceiver module, in order to realize double slope triangular wave modulation signal, a modulation signal generation circuit based on DDS technology is designed, which produces triangle wave with different frequency of rising edge and descending edge. At the same time, a linear amplification circuit with variable coefficients is designed to adjust the amplitude of the modulated signal, and a attenuation compensation circuit is designed to solve the problem that the power of the microwave reflected signal will decay rapidly with the increase of the distance. In this paper, the clock of the system is divided by FPGA, the sampling frequency is set up, and the characteristic of the expansibility of Linux system is used, the circuit structure of FPGA ARM is put forward, and the realization of each module circuit is discussed respectively. The design of FPGA program and FPGA interface Linux driver is also discussed. Finally, the if signal processing algorithm of FMCW mode microwave vehicle detector is studied. In order to display if signal and its frequency spectrum more intuitively, and to set relevant parameters conveniently, the software of if signal processing is developed in PC, and the if signal is transformed by windowed FFT operation. In order to verify the relationship between the distance and the frequency of the if signal, the distance detection experiments of single target and multi-target are carried out in this paper, and the sweep bandwidth parameters in the ranging formula are calibrated, and the ranging accuracy of the vehicle detector is determined. In this paper, the background subtraction method is used to detect the target, and the threshold of flow detection is set for the simulated driveway in the experimental scene. In addition, the realization principle and experimental method of vehicle classification are also discussed in this paper. In summary, the FMCW mode microwave vehicle detector is studied and designed in this paper, which lays a foundation for further research.
【學(xué)位授予單位】:東南大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:U491.116
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 魏國華;吳嗣亮;;Range Ambiguity Elimination in a Short-Range FMCW Radar System[J];Journal of Beijing Institute of Technology(English Edition);2007年02期
2 屈飛園;曹寧;;車載FMCW雷達(dá)準(zhǔn)確檢測多目標(biāo)的一種有效方法[J];科學(xué)技術(shù)與工程;2012年06期
3 夏春云;池龍;張群;梁穎;朱蒙;;FMCW-SAR高分辨距離成像中混頻模式分析與頻譜補(bǔ)償方法[J];火力與指揮控制;2013年10期
4 劉寶,劉軍民;FMCW雷達(dá)快速高精度測距算法[J];電子測量與儀器學(xué)報(bào);2001年03期
5 王穎;曲長文;宋軍;李青山;;一種改進(jìn)的FMCW SAR RD成像算法[J];海軍航空工程學(xué)院學(xué)報(bào);2008年05期
6 王虹;李興國;;FMCW雷達(dá)差頻信號的非線性分析[J];電光與控制;2010年10期
7 齊國清;FMCW雷達(dá)相位測量誤差分析及抑制方法[J];信號處理;1998年02期
8 楊全麗;謝克明;閆高偉;;FMCW雷達(dá)系統(tǒng)在測量煤粉倉料位中的建模及其仿真[J];太原理工大學(xué)學(xué)報(bào);2006年S1期
9 王穎;曲長文;陳波濤;周強(qiáng);;FMCW SAR頻率變標(biāo)算法研究[J];上海航天;2010年06期
10 胡漢南;線性FMCW雷達(dá)中頻信號的采樣準(zhǔn)則和頻譜特性[J];中國航海;2000年01期
相關(guān)會議論文 前4條
1 李守鐸;李喬藝;梁歡;張啟迪;熊燕玲;;基于FMCW技術(shù)的光柵最小分辨距離的研究[A];黑龍江、江蘇、山東、河南、江西 五省光學(xué)(激光)聯(lián)合學(xué)術(shù)‘13年會論文(摘要)集[C];2013年
2 甘體國;;小型FMCW近炸引信高度表[A];1993年全國微波會議論文集(下冊)[C];1993年
3 齊國清;賈欣樂;;FMCW雷達(dá)液位測量系統(tǒng)信號處理方法[A];第九屆全國信號處理學(xué)術(shù)年會(CCSP-99)論文集[C];1999年
4 魏崇毓;王大全;;FMCW生命體探測雷達(dá)信號處理問題[A];2011年全國微波毫米波會議論文集(下冊)[C];2011年
相關(guān)博士學(xué)位論文 前4條
1 齊國清;FMCW液位測量雷達(dá)系統(tǒng)設(shè)計(jì)及高精度測距原理研究[D];大連海事大學(xué);2001年
2 張大煒;機(jī)載SAR實(shí)時(shí)處理技術(shù)和FMCW-SAR成像的研究[D];中國科學(xué)院研究生院(電子學(xué)研究所);2007年
3 盛懷茂;汽車防撞毫米波FMCW雷達(dá)前端集成關(guān)鍵技術(shù)研究[D];中國科學(xué)院研究生院(上海微系統(tǒng)與信息技術(shù)研究所);2002年
4 Ahmed Hosni Ali Mohamed Elghandour;[D];長春理工大學(xué);2013年
相關(guān)碩士學(xué)位論文 前10條
1 余亞會;FMCW激光雷達(dá)測距拍信號降頻方法研究[D];哈爾濱工業(yè)大學(xué);2015年
2 趙冬磊;W波段混合集成FMCW源研究[D];電子科技大學(xué);2014年
3 劉飛;24GHz混合集成FMCW源研究[D];電子科技大學(xué);2014年
4 馬世能;單天線FMCW雷達(dá)射頻收發(fā)前端高隔離技術(shù)研究[D];電子科技大學(xué);2014年
5 吳志平;FMCW雷達(dá)的發(fā)射泄漏及相位噪聲的抑制[D];電子科技大學(xué);2014年
6 郭齊;應(yīng)用于FMCW雷達(dá)系統(tǒng)的頻率源設(shè)計(jì)[D];電子科技大學(xué);2015年
7 金龍;C波段FMCW天氣雷達(dá)探測試驗(yàn)和應(yīng)用研究[D];成都信息工程學(xué)院;2015年
8 宋鋮;FMCW雷達(dá)物位計(jì)收發(fā)前端的設(shè)計(jì)[D];電子科技大學(xué);2015年
9 湯光超;GPS在高分辨FMCW SAR中的應(yīng)用研究[D];國防科學(xué)技術(shù)大學(xué);2013年
10 彭國豪;FMCW雷達(dá)近距離反射性能研究[D];大連海事大學(xué);2016年
,本文編號:2199040
本文鏈接:http://sikaile.net/kejilunwen/daoluqiaoliang/2199040.html