中文摘要：

为了实现工业大尺寸几何形状的测量，基于激光测距原理，构建测量系统，提出通过极坐标转化为直角坐标系的方法，在二维平面内拟合测量对象的表面轮廓。首先，从多种反射率材料分析激光测距测距延迟时间。然后，以800mm标准宽座角尺对激光测距仪进行了精度校准，标准差最大1．5mm，最小值0．2mm，适于大尺寸测量范围。利用VisualC＋＋6．0中MSComm控件实现了激光测距仪与计算机之间的数据通信。最后，以800mm标准宽座角尺和凹凸海绵表面为测量对象，利用本方法进行实验，得到了相应表面轮廓，并计算了标准角尺拟合直线的标准差最大为0．7mm。实验结果表明，测距仪毫米级精度可以实现二维平面拟合，体现了手持式激光测距仪在工业大尺寸测量方面的应用前景。

英文摘要：

A method of fitting 2D surface figure by transforming polar coordinates into XY coordinates is proposed, and the measurement system is established based on laser ranging in the field of industry large-scale measurement. First, the delay time measurement and distance measurement are analyzed using various reflective materials. And then the precision calibration of the laser ranger is carried out for 800mm standard device of the square, and the maximum and minimum of standard deviation are 1.5mm and 0.2mm, respectively. The MSComm control in Visual C ＋ ＋ 6.0 is applied to data communication between laser ranger and computer. Finally the corresponding surface figure and point deviation of the line are obtained by 2D scanning measurement using an 800mm standard device of the square and a concavo-convex sponge as the measurement objects. The maximum standard deviation of the fitting line is 0.7mm. Experiment results prove that portable laser ranger will be widely used in the industrial measurement based on precise laser ranger.