發(fā)布時(shí)間：2019-06-24 13:28

【摘要】：電力線三維重建是直升機(jī)激光雷達(dá)(light detection and ranging,LiDAR)電力巡線的一項(xiàng)重要內(nèi)容。提出了兩種基于直升機(jī)LiDAR點(diǎn)云的電力線三維重建模型,包括直線段與懸鏈線段相結(jié)合的模型(簡(jiǎn)稱為"模型一")、直線段與拋物線段相結(jié)合的模型(簡(jiǎn)稱為"模型二")。其中,直線段位于xy平面,懸鏈線段和拋物線段位于過(guò)直線段的鉛垂面。模型的創(chuàng)新之處在于兩者均使用了電力線LiDAR點(diǎn)水平坐標(biāo)進(jìn)一步投影到xy平面上相應(yīng)的擬合直線產(chǎn)生的比例因子作為懸鏈線、拋物線方程的參數(shù)。使用6個(gè)有代表性的實(shí)驗(yàn)數(shù)據(jù)、4個(gè)評(píng)價(jià)指標(biāo)對(duì)6種重建模型(已有的4種和上述提出的兩種)的性能進(jìn)行評(píng)價(jià)和對(duì)比。實(shí)驗(yàn)結(jié)果表明,模型二具有最高的重建效率和最高的重建精度。另外,實(shí)驗(yàn)結(jié)果進(jìn)一步說(shuō)明鉛垂面及鉛垂面上投影模型的選擇、誤差因素的考慮等3個(gè)因素對(duì)重建模型性能有著顯著影響。
[Abstract]:Power line 3D reconstruction is an important part of helicopter lidar (light detection and ranging,LiDAR) power patrol. Two 3D power line reconstruction models based on helicopter LiDAR point cloud are proposed, including the combination of straight line segment and catenary segment ("Model 1" for short) and the model of combining straight line segment with parabola segment (referred to as "Model 2" for short). Among them, the straight line segment is located in the xy plane, and the catenary segment and the parabolic line segment are located on the vertical surface of the straight line segment. The innovation of the model is that both of them use the proportional factor produced by the horizontal coordinate of the power line LiDAR point projected to the xy plane as the parameters of the catenary and parabola equation. Six representative experimental data and four evaluation indexes were used to evaluate and compare the performance of six reconstruction models (the existing four and the two proposed above). The experimental results show that Model 2 has the highest reconstruction efficiency and the highest reconstruction accuracy. In addition, the experimental results further show that the selection of the projection model on the vertical surface and the consideration of the error factors have a significant impact on the performance of the reconstruction model.
【作者單位】： 國(guó)家測(cè)繪產(chǎn)品質(zhì)量檢驗(yàn)測(cè)試中心;武漢大學(xué)資源與環(huán)境科學(xué)學(xué)院;中國(guó)測(cè)繪科學(xué)研究院;城市空間信息工程北京市重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(41371405,41671440) 城市空間信息工程北京市重點(diǎn)實(shí)驗(yàn)室開(kāi)放基金(2015102)~~
【分類號(hào)】：TM755

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