摘要
城市道路地下空洞检测可有效减少道路塌陷,保证道路安全,是城市建设工作中的重要任务。基于混沌信号的探地雷达相比传统探地雷达具有抗干扰性强,信噪比高,已被证明可以用于空洞检测。但现有混沌探地雷达在确定空洞位置时需要采集大量数据,并对回波信号和延迟后的发射信号进行互相关运算,所需时间较长,给信号的存储和传输也带来很大负担,不利于实际应用。文中针对混沌探地雷达,提出了一种基于压缩感知的二维成像新方法,并将其用于地下空洞检测。该方法采用混沌脉冲相位调制信号作为信号源,利用压缩感知取代传统混沌信号处理过程中的互相关运算,减少信号采集数据量。仿真和实验结果表明,基于压缩感知的混沌探地雷达成像新方法与传统混沌探地雷达成像方法相比,在保持成像结果的有效性和准确性的同时,只需传统方法采样信号数据量的10%即可准确检测地下空洞目标,极大地提高了探地雷达的工作效率。
It is an important task in urban construction to detect the underground cavities of urban roads,which can effectively reduce road collapse and ensure road safety.Compared with the conventional ground penetrating radar(GPR),the chaotic based GPR has the advantages of strong anti-interference and high signal-to-noise ratio.However,the existing chaotic GPR needs to collect a large number of data when determining the location of the cavity,and carry out cross-correlation operation between the echo signal and the delayed transmission signal,which takes a long time,and brings a great burden to the storage and transmission of the signal,which is not conducive to practical application.In this paper,a new two-dimensional imaging method based on compressed sensing is proposed for chaotic ground penetrating radar,and it is used in underground cavity detection.In this method,chaotic pulse phase modulation(CPPM)signal is used as the signal source,and compressive sensing(CS)is used to replace the cross-correlation operation in the process of traditional chaotic signal processing,so as to reduce the amount of data collected.The simulation and experimental results show that compared with the traditional chaotic GPR imaging method,the new imaging method based on CS can accurately detect the underground cavity target with only 10%of the data sampled by the traditional method while maintaining the effectiveness and accuracy of the imaging results,which greatly improves the efficiency of GPR.
作者
师哲
刘丽
徐航
王冰洁
李静霞
SHI Zhe;LIU Li;XU Hang;WANG Bingjie;LI Jingxia(Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《电子器件》
CAS
北大核心
2020年第5期1158-1167,共10页
Chinese Journal of Electron Devices
基金
国家自然科学基金项目(41704147)
国家自然科学基金项目(41604127)
国家自然科学基金项目(61601319)
山西省自然科学基金项目(201801D221185)
山西省自然科学基金项目(201701D221114)
山西省重点研发计划项目(社会发展领域)(201803D31037)。
关键词
探地雷达
压缩感知
二维成像
地下空洞
混沌脉冲位置调制信号
ground penetrating radar(GPR)
compressive sensing(CS)
two dimensional imaging
underground cavity
chaotic pulse position modulation(CPPM)
