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(dá)200~1000HZ，同時要求所有32 路通道同步采集數(shù)據(jù)，并且要達(dá)到16 位的A/D 轉(zhuǎn)換精度。通過對系統(tǒng)參數(shù)的分析，使用單張32通道單A/D 數(shù)據(jù)采集卡進(jìn)行偽同步數(shù)據(jù)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(shè)備，從而大大節(jié)約了數(shù)據(jù)采集系統(tǒng)的費用。
關(guān)鍵詞：數(shù)據(jù)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