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车辙深度测量通常使用共梁式多路激光测距传感器测量路面多个离散点,由多个测量点组成的断面信息计算车辙深度,因横向采样点间距宽,导致测量误差较大。提出了一种新的激光车辙深度测量方法,采用线激光器和三维(3D)相机组合集成测量路面3D断面,通过3D断面解算车辙深度。3D相机以一定夹角采集激光器投射在路面的线结构光图像,获取路面的3D断面数据,对断面数据通过拉依达准则进行异常值剔除,再进行旋转、平移和模型识别,最终计算路面左右轮迹和最大车辙深度。实际证明,数据重复性和相关性都达到98%以上,与传统方法相比较,该方法采样间距小、测量精度高、成本低、通用性强,具有广阔的使用推广价值。
Rutting depth measurement Commonly used multi-beam laser distance measuring sensor measuring multiple discrete points of the road surface, the measurement of the point by a number of points of information to calculate the depth of the track, due to horizontal sampling points wide spacing, resulting in large measurement error. A new method for laser rutting depth measurement is proposed. The 3D cross section is measured by the combination of line laser and 3D camera, and the rutting depth is calculated by 3D cross section. The 3D camera picks up the line-structured light image projected by the laser on the road surface with a certain angle to obtain the 3D cross-section data of the road surface, removes outliers from the cross-section data through Raida’s criterion, and then performs rotation, translation and model recognition to finally calculate the left and right Wheel track and maximum rut depth. The results show that the repeatability and correlation of the data are up to 98%. Compared with the traditional methods, this method has the advantages of small sampling interval, high measurement accuracy, low cost, high universality and wide application and popularization value.