Development Of The Vehicle-home Ground Penetrating Radar System And Application Experimental Study

With the rapid development of highway, pavement quality detection becomes quitesignificant. The main problem is how to acquire the pavement information fastly and accuratelywithout damage to the pavement structure and disturbing the regular highway drving speed, thuscapturing the quality and life cycle of the highway pavement. However, the detection efficiency ofthe existing ground-penetrating radar (GPR) equipments still can not fully meet the requirementsof high-speed detection. This research presents efforts to overcome these constraint and limitationsby developing a new UWB GPR system that can be mounted at the bottom side of the vehicle. Thepulse generated based on the step recovery diodeis used as the transmitted signal and the real-timesampling rate can be up to8Gsample/s. According to the computer parallel multi-thread andsynchronous technology, a GPR data acquisition system is designed and developed, solving thedata overflow problem between data acquisition and storage. The vehicle-borne system can beoperated detection at the speed of100KM/H by employing the antenna design with air coupledUWB dual-channel structure. A modular radar image processing software GIMAGE is designedand developed in the Matlab environment. Finally, indoor and outdoor application tests areperformed by using this GPR system, as well as the forward simulation. The indoor tests resultsshow that the detection accuracy of the rebar depth is±0.77cm, and the outdoor experiment canacquire the disease information of the highway quickly, effectiveness of the actual road detectionapplication for the new ground-penetrating radar system and the new software are verified.