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Design of multi-source data acquisition module for rapid detection of track dynamics and statics
1.College of Physical Science and Technology，Central China Normal University，Wuhan 430079，China； 2.China Railway First Survey and Design Institute Group Co.，Ltd.，Xi′an 710043，China
Abstract： 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.
Key words : track detection；multi-sensor integration；synchronous acquisition；FPGA