LiDAR点云数据的电力线3维重建
Powerline three-dimensional reconstruction for Li DAR point cloud data
- 2014年18卷第6期 页码:1223-1229
纸质出版日期: 2014
DOI: 10.11834/jrs.20144075
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纸质出版日期: 2014 ,
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[1]赖旭东,戴大昌,郑敏,杜勇.LiDAR点云数据的电力线3维重建[J].遥感学报,2014,18(06):1223-1229.
LAI Xudong, DAI Dachang, ZHENG Min, et al. Powerline three-dimensional reconstruction for Li DAR point cloud data[J]. Journal of Remote Sensing, 2014,18(6):1223-1229.
利用Li DAR数据进行电力设施提取与建模可以克服传统工程测量电力巡线工作量大
危险性高
效率低下等缺点
但现有的电力线提取研究主要集中在电力线的分离与提取
并且拟合的精度不高。针对此问题本文提出了一种精度较高的电力线拟合方法。首先
根据电力线两端悬挂、中间自然下垂的特点
求解电力线拟合的最佳几何模型;然后
通过电力线的走向和端点
建立电力线拟合的最佳平面坐标系;最后
采用基于二次多项式限制的最小二乘法拟合电力线
解算出最优参数
生成最终电力线模型。对真实数据的处理和精度评价表明
本文方法不仅能够实现电力线的快速3维重建
而且能够达到较高的拟合精度。
High-voltage power transmission line is an important infrastructure of a country
the breakdown of power facilities may bring huge damage to the daily lives of the people and the economy of the country. Thus
management and monitoring of power f acilities is important. Traditional engineering measures have the drawbacks of high workload
high risk
and low efficiency. Airborne Li DAR can overcome these drawbacks
and cannot be easily affected by environment
making Li DAR an important d evelopment trend for power line measurement. At present
airborne Li DAR is mainly used for the reconstruction of urban areas and natural features; extraction and modeling of power facilities is still in its infancy. The main problems are too much human i ntervention
low accuracy
and lack of continuity. Therefore
this paper proposes a new method based on the analysis of the characteristics of power facilities and extraction algorithm. First
the optimal catenary fitting geometry model of the powerline was o btained based on the powerline characteristics. The nonlinear catenary equation was simplified to linear polynomial form based on the principle of Lagrange polynomial to improve the operation efficiency. Second
the projection direction of the powerline in the XOY plane was determined based on a statistic method. Afterward
the vertical plane that contains the starting and end points and are perpendicular to the power line were also determined based on the characteristic of the end laser point. The distance of all points to the plane as X-axis parameters was calculated and the points corresponding to the Z coordinate values as Y-axis parameters were obtained to determine the optimal plane coordinate system. Finally
the quadratic-polynomial-limited least square method was used to fit the powerlines
obtain the optimal parameters
and generate the final power line model. Experiments on real data showed that the proposed method improved the facility and veracity of powerline fitting. The precision reached ± 1. 740 cm both in the vertical and horizontal planes. The proposed method can quickly fit the powerline and reach a high accuracy
which are significant in the study of 3D reconstruction by Li DAR point cloud.
Li DAR技术点云数据电力线3维重建
Li DARpoint cloud datapower linethree-dimensional