轨道动静结合快速检测多源数据采集模块设计

Design of multi-source data acquisition module for rapid detection of track dynamics and statics

多源异构数据的高精度同步采集是轨道动静结合快速检测系统中的关键技术。设计了一套轨道动静结合快速检测多源数据采集模块,该模块以Xilinx公司的Artix-7系列FPGA为主控芯片,以英伟达TX2高性能计算机为核心数据处理单元,利用高稳晶振、结合GPS输出的PPS脉冲和NEMA数据建立高精度时间基准,通过控制AD采样频率实现位移传感器、温度传感器、激光位移传感器等多传感器数据的高精度实时同步采集。该模块体积小、成本低。测试表明,该模块可实现多传感器数据高精度同步采集,同步精度达微秒级。

The high-precision synchronous collection of multi-source heterogeneous data is a key technology in the rapid detection system of combined track motion and static.In this paper,a set of track dynamic and static combined rapid detection multi-source data acquisition module is designed.This module uses Xilinx′s Artix-7 series FPGA as the main control chip,NVIDIA TX2 high-performance computer as the core data processing unit,and uses high-stability crystal oscillators and PPS pulse and NEMA data output by GPS establish a high-precision time reference,and realize high-precision real-time synchronous collection of multi-sensor data such as displacement sensors,temperature sensors,and laser displacement sensors by controlling AD sampling frequency.The module is small in size and low in cost.Tests show that the module can achieve high-precision synchronous collection of multi-sensor data,with a synchronization accuracy of microseconds.