青藏铁路专用检测探地雷达实时数据采集与传输系统设计

THE DESIGN OF THE REAL-TIME DATA ACQUISITION AND TRANSMISSION SYSTEM FOR SPECIAL GROUND PENETRATING RADAR OF THE QINGHAI-TIBET RAILWAY

为了快速检测青藏铁路路基冻融等病害,研制了专用探地雷达的实时数据采集、处理与传输系统。采用高速、高精度并行模数转换器,结合现场可编程逻辑阵列(FPGA)技术和通用串行总线(USB)实现雷达回波数据快速、实时传输,采用高性能浮点数字信号处理器对雷达回波数据进行实时处理。针对专用探地雷达三个天线同时工作,设计了3个实时数据采集、处理与传输通道。测试结果表明该系统达到了较高的数据吞吐率,满足探地雷达在青藏铁路上实施快速、连续检测的要求。

In order to quickly detect the hazards such as subgrade freezing and thawing along the Qinghai-Tibet Railway,the authors developed a real-time data acquisition,processing and transmission system for special ground penetrating radar system in this project.Parallel ADC of high-speed and high-precision combined with FPGA technology and USB bus was applied to achieve fast,real-time transmission of radar data which were processed in real-time by the floating-point digital signal processor of high-performance.Three-channel real-time data acquisition,processing and transmission system was designed.The experimental results show that the system can achieve a relatively high data throughput to meet rapid and continuous testing requirements of the ground-penetrating radar in the Qinghai-Tibet Railway.