基于可视域分析的管道巡检标准点的设置方法及验证

Setting of standard points for pipeline inspection based on viewshed analysis and its verification

为了提高管道GPS巡检标准点的有效性,结合管道巡检工作的管理要求,应用地理信息系统(geographic information system,GIS)的可视域分析功能,在管道沿线三维场景环境下,对巡检点的可视域进行分析、计算和表达,从而为管道巡检标准点的设置和调整提供依据。实例应用结果表明:该方法弥补了现有移动巡检系统不能判定巡检标准点与管道路由位置关系的不足,避免了在巡检过程中巡检人员的视线因地形起伏或地物遮挡而无法进行有效巡检的弊端,提高了管道线路的巡检质量,降低了管理成本。

To improve the effectiveness of standard points for GPS pipeline inspection, viewsheds of such points were analyzed, computed and expressed under 3D simulation environment along pipeline by combing the management requirements of pipeline inspection and using the viewshed analysis function of GIS, so as to provide reference for setting and adjusting the standard points for pipeline inspection. Application results show that this technique effectively makes up the deficiency of the mobile inspection system that may not accurately determine positions between the standard inspection points and the pipeline route. Accordingly, topographic reliefs or surface features may no longer present barriers for high- efficiency inspection. The technique can promote quality of pipeline inspections and also effectively reduce the management costs. （7 Figures, 1 Table, 12 References）