Design and implementation of key technologies for real-time three-dimensional ground-penetrating radar
To improve the detection level of municipal roads for rapid and effective municipal road collapse warning and rapid search for municipal pipe network distribution,the 22nd Research Institute of China Electronics Technology Group Corporation designed and devel-oped real-time three-dimensional ground-penetrating radar(3D GPR).With the real-time 3D GPR,which is based on the architecture of field programmable gate array and digital signal processor(FPGA&DSP),the institute achieved the design and implementation of several key technologies for the multi-channel high-speed acquisition system,enriching the road detection techniques and methods.The real-time 3D GPR enables high-speed acquisition of ten-channel radar data using the horizontally polarized antennae equipped with five transmitters and six receivers.The channels can be switched using high-speed switches,which operate in an interactive interpolation manner.The 3D GPR allows for up to 32 channels and detection speeds of above 60 km/h(channel interval:2 cm).This is attributed to the switching of the antenna array using switches.The optimum antenna polarization design was verified by the comparison of experi-mental data from cavity-and metal-plate-based experimental sites.As a result,the optimal antenna scheme was determined.The meas-ured results show that,compared to general LTD-2600 radar,the real-time 3D GPR boasts a higher acquisition speed and higher per-formance in terms of amplitude and phase,conducive to the improvement of road disaster detection technologies.Therefore,there is high market demand for the real-time 3D GPR.
three-dimensional ground-penetrating radarantenna array switching using switchesmultichannelhigh-speed acquisi-tionhorizontal polarization mode
万方数据
维普
