中文摘要：

重轨的平直度检测是重轨生产过程中重要的一个环节，该项检测的速度、准确性、稳定性等因素直接影响重轨总体质量；以中国某大型钢铁集团轨梁厂的重轨平直度检测现状为背景，利用激光传感、数据采集、计算技术等现代技术，设计了一套基于并行计算的重轨平直度在线检测系统；系统采用14个激光位移传感器和2个旋转编码器分别对于重轨的7个水平方向位移测点、7个竖直方向位移测点、和重轨传输方向的位移进行实时测量，得到的信号转换为数字信号后，在PC机内通过GPU并行计算进行同步配准、块内数据分析、块间数据分析、帧间数据分析等处理，除去粗糙度、氧化铁皮、高频振动、低频振动等干扰，最后得到并输出平直度信息；实验及现场应用表明，该方法检测速度可达到3m／s、精确度可达到0．1mm。

英文摘要：

Rail straightness measurement is critical in rail production, in which the detecting speed, accuracy and stability directly affect the overall rail production. In this paper, using modern technology such as laser sensors, data acquisition, and computing technology, an in- novative rail straightness measurement method was designed and implemented based on parallel computing. In the design. 14 laser displace ment sensors and 2 rotary encoders were used to measure respectively 7 level displacements, 7 vertical displacements, and rail transmission displacement in real time. After those signals conversed to digital and transferred to server computer, CPUs and GPUs will： 1） synchro- nous matching, 2） inner block analyzing, 3） block analyzing, 4） frame analyzing, 5） straightness analyzing. The disturbing factors, such as iron oxides, side sliding, low frequency vibrations, and high frequency vibrations were eliminated. Finally, get the rail straightness informa- tion and output, save, transfer, or used to guide production. Experiments and practical application show that, the method not only is feasi- ble, but also its detection speed can up to 3 m/s, and accuracy up to 0.1 mm.