基于线结构光的水泥混凝土路面错台三维检测

Joint Faulting Three dimension Detection Method on Cement Concrete Pavement with Line structure Light

摘要:

提出了一种基于线结构光的错台三维检测方法.激光器发出的线结构光垂直入射到路面上，然后由电荷耦合元件（CCD）相机拍摄经路面漫反射形成的光束，实现原始数据采集.依据激光三角法计算出路面三维高度数据，并对三维数据特征和错台形状进行分析，提出了致密错台量计算方法，可得到平均错台量和最大错台量.结果表明：91%的错台三维检测结果与直尺测量结果绝对误差在2 mm内.

关键词:水泥混凝土路面; 错台检测; 线结构光; 三维检测

Abstract:

In order to realize the accurate detection of joint faulting on cement concrete pavement, a kind of three dimension detection method based on line structure light was proposed. The structured light emitted from laser irradiated vertically on the road and the charge coupled device（CCD） camera captured the beam which was formed by the pavement diffuse reflection, so as to realize the data acquisition. Then, the road three dimension information was calculated based on laser triangulation algorithm. According to the three dimension information data characteristics and the shape of cement concrete pavement joint faulting, the dense joint faulting value calculation method was proposed. The average value and maximum value of joint faulting were obtained. Experiment results show that 91% of the absolute error between three dimension method results and measurement results by ruler is within 2 mm.

Key words:cement concrete pavement; joint faulting detecting; line structure light; three dimension detection