一种面向大型结构件的激光雷达测量规划方法

Measurement Planning for Large Structural Parts Using Laser Radar

使用激光雷达对大型结构件实施测量时往往需要通过布设多个测量站位构建大尺寸测量网络,其中激光雷达的站位及其数目是影响测量结果的关键因素。针对飞机大部件外形测量需求,设计了一种面向大型结构件的激光雷达测量规划方法。以测量精度为约束,以测量站位数目和测量区域划分结果为评价目标,对待测数模进行特征离散并提取离散点法矢信息,利用基于区域生长算法的测量站位规划方法获取初始站位及数量,引入测量不确定度,优化测量站位和测量区域的划分结果。实验表明,相较于基于经验的人工测量规划,该方法更易得到大范围、少数量的测量区域划分结果以及合理的激光雷达测量站位,具有良好的可行性和有效性。

When a laser radar is used to measure large structural parts,it is often necessary to establish multiple measurement stations to construct a large measurement network,for which the station positions and the number of laser radars are key factors affecting the measurement results.A method for laser radar measurement planning of large structural parts is designed for large component contour measurements of large aircraft component.The measurement accuracy is considered as a constraint,and the method considers the number of measurement stations and the division results of measurement area as the evaluation target.Further,a measurement mathematical model reflects the characteristics of discrete information and establishes a discrete point method.Using the method of measurement station planning based on the region growing algorithm,the initial number and location of stations are determined.Moreover,measurement uncertainty optimization considering the division of the measurement area and results is adopted.Experimental results show that compared with experience-based manual measurement planning,the proposed method is more feasible and effective in performing large-area measurements with a small number of measurement area divisions and a reasonable number of measurement stations.