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Abstract Abstract:Research purposes: With the increase of railway operation mileage and speed，the workload about retest of existing lines is growing. There is a great security risk，multi- step process and low measurement efficiency in the traditional way to retest the existing lines. Thus the research on an efficient，safe and practical work method is needed. Research conclusions ：( 1 ) Vehicle laser radar measurement technique can obtain the spatial geometric information of the terrain around the railway rapidly and in real time with almost zero interference on operations. ( 2 ) With a few points to refine the original laser point cloud，you can obtain massive data which meets the accuracy requirements on the retest of railway. ( 3 ) Digital imaging results truly record the conditions of railway and corporate equipment on the spot，making the investigation results more intuitive and reliable. (4 ) The research results can be applied to retesting of existing lines， adding new lines， maintenance of equipment， landscape visualization and so on， creating conditions for information management of railway operation systems.
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Received: 07 March 2016
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2016, Vol. 33 
