摘要
研究多普勒激光雷达技术在轨道曲度和侧向不平度测量方面的应用(包括对准和轮距变化)。文章提出的测量方法采用两个低仰角进行轨道测量,略微倾斜的激光雷达传感器指向每个轨道测量面。多普勒激光雷达镜头以微小的正向角安装,从纵向和侧向测量轨道速度。采用一种基于车速和轨道几何不平度之间的频率带宽相异的方法,经处理的侧向速度测量结果用于评估轨道的轨距和对准变化。采用轨道车车体安装的多普勒激光雷达系统得到一系列轨道几何测量试验结果。研究表明,激光雷达测量结果与现有轨道车载传感器之间紧密匹配。研究中的现场试验表明:激光雷达传感器可以半自主和自主的方式提供一种可靠的非接触轨道监测仪器,用于现场各种天气和轨道条件。
The application of Doppler-based Light Detection and Ranging ( LIDAR) technology for determining track curvature and lateral irregularities, including alignment and gage variation, are investigated. The proposed method uses track measurements by two low-elevation, slightly tilted LIDAR sensors nominally pointed at the rail gage face on each track. The Doppler LIDAR lenses are installed with a slight forward angle to measure track speed in both longitudinal and lateral directions. The lateral speed measurements are processed for assessing the track gage and alignment variations, using a method that is based on the frequency bandwidth dissimilarities between the vehicle speed and track geometry irregularity. Using the results from an extensive series of tests with a body-mounted Doppler LIDAR system on-board a track geometry measurement railcar, the study indicates a close match between the LIDAR measurements and those made with existing sensors on-board the railcar. The field testing conducted during this study indicates that LIDAR sensors could provide a reliable, non?contact track monitoring instrument for field use in various weather and track conditions, potentially in a semi-autonomous or autonomous manner.
出处
《电光系统》
2018年第3期24-30,共7页
Electronic and Electro-optical Systems
