基于激光传感器的轨距测量系统研究

Research on track gauge measurement system based on laser sensor

在地铁的运行中,轨距值是否处于合理范围是影响地铁能否安全运行的关键因素。针对快速、连续地检测地铁轨距的需求,提出一种基于LT3PU激光测距传感器和三角测距原理的非接触式轨距测量系统,该系统通过激光传感器采集轨距检测点的几何参数,经过模数转换后将数字信号传输到上位机,然后由基于最小二乘原理的轨距算法计算得到当前位置的轨距值,并在上位机系统中实现实时数据记录以便进行离线分析,大量的实验结果表明,该系统的检测效率和检测精度比传统的接触式轨距检测大幅提升,轨距检测精度达到0.3mm,符合目前的轨距检修标准,在实验室和地铁线路上测试效果良好。

In the operation of the subway,whether the gauge value is in a reasonable range is a key factor affecting the safe operation of the subway.Aiming at the need of fast and continuous detection of metro gauges,the paper proposes a non-contact gauge measurement system based on LT3 PU laser ranging sensor and triangulation principle.The system collects the geometric parameters of the gauge detection points through laser sensors.After the analog-to-digital conversion,the digital signal is transmitted to the upper computer,and then the gauge value based on the least squares principle is used to calculate the gauge value of the current position,and real-time data recording is realized in the upper computer system for offline analysis,therefore a large number of experiments are performed.The results show that the detection efficiency and detection accuracy of the system are greatly improved compared with the traditional contact gauge detection.The gauge detection accuracy reaches0.3 mm,which is in line with the current gauge maintenance standard,and the test results are good on the laboratory and subway lines.