机场道面地下管线三维定位算法

Three-dimensional Positioning Algorithm for Underground Pipelines on Airport Pavement

针对已有方法对机场道面地下管线定位误差较大的问题,提出一种机场道面地下管线三维定位算法。首先,对探地雷达所成管线的B-scan图像进行预处理,将处理后的图像输入Faster-RCNN网络中,对B-scan图像中的管线进行目标识别;其次,由于管线目标符合双曲线形态特征,采用双曲线顶点获取算法确定顶点位置;最后,设计三维空间直线拟合(three-dimensional space line fitting,TDSLF)算法来判断地下管线的具体位置,进行地下管线的三维重构。所提算法实现了地下管线的自动识别与定位,与真实机场道面地下管线实际位置的最大误差仅为4 cm。

Aiming at the problem of large positioning error of existing methods for underground pipelines on airport pavement,a three-dimensional positioning algorithm for underground pipelines on airport pavements was proposed.Firstly,the B-scan image of the pipeline formed by the ground penetrating radar was preprocessed,the processed image was input into the Faster-RCNN network,and the pipeline in the B-scan image was identified.Secondly,since the pipeline target conformed to the hyperbolic morphological characteristics,the hyperbolic vertex acquisition algorithm was used to determine the vertex position.Finally,the three-dimensional space line fitting(TDSLF)algorithm was designed to determine the specific location of the underground pipeline and carried out the three-dimensional reconstruction of the underground pipeline.The proposed algorithm realized the automatic identification and the positioning of underground pipelines,and the maximum error with the actual position of the pipeline under the real airport pavement was only 4 cm.