Signal Processing Of GPR Used On Road Only

Ground Penetrating Radar is a kind of equipment with lossless detecting, which has been used comprehensively for roads detecting. Comparing with traditional detecting methods of roads detecting, it has many advantages, such as no destruction to road surface, rapid detection, continuity, high resolution, flexible operation, low cost and wide detecting range. Attribute to above virtues, the road geological radar is widely used in road projects. However, the related signal processing algorithms for echo waves of road radar develop very slowly, so the research of road radar signal processing algorithms has a great meaning in actual application.This paper firstly analyzes the electromagnetic wave transmitting rules in dielectric, illuminates the basic principles and structure of road radar, and proposes method to obtain the original data of road radar. Secondly, adopts a proper methods for noise decreasing-a combination of wavelet transformation and K-L transformation, researchs the instant frequency abstraction algorithms based on time-frequency transforming and simulates in ideal dielectric the echo wave figure of different objects by limited time difference algorithm. And on the basis of above two algorithms, this paper realizes the localization of special objects based on echo wave figure characteristics and objects classification based on echo wave of time-frequency property. Finally, tests the real data and the results show that the methods proposed by this paper are effective.