軌道梁檢測是高速列車安全運行的重要保證。軌道梁檢測要求檢測頻率達200~1000HZ，同時要求所有32 路通道同步采集數據，并且要達到16 位的A/D 轉換精度。通過對系統參數的分析，使用單張32通道單A/D 數據采集卡進行偽同步數據采集，即使在1000HZ 的采集頻率下其一個周期的采集范圍也不超過激光探頭的光斑直徑。這樣就不必采用昂貴的同步設備，從而大大節約了數據采集系統的費用。
關鍵詞：數據采集，同步，多通道，高速列車
INSPECTION TECHNIQUE IN HIGH SPEED GUIDE WAY CONSTRUCTION Zhou Zhengmao (Shanghai Tonghao Civil Engineering Consulting Co. Ltd, Shanghai 200093, China) Abstract: Guideway inspection is very important to keep safe in the running of high speed train. Special
requirement in high speed guide way inspection including inspection frequency up to 200~1000HZ, synchronization in 32 channels and 16 bits A/D conversion are considered in this paper. After system parameter analysis, we found it's possible to limit acquisition range not exceeding light spot of laser sensor by psudo-synchronous data acquisition with a single A/D converter, 32-channel card, even under acquisition frequency of 1000HZ. Thus, expensive synchronous equipment is not necessary and large expense is saved.
Keywords: data acquisition, synchronization, multi-channel, high speed train, guide way