Method for generating road design surface information by laser radar scan

A technology of laser radar and laser scanner, which is applied in calculation, cross-section drawing, special data processing application, etc., can solve the problems of poor precision and low efficiency of actual measurement, and achieve the effect of high precision, high efficiency and automatic acquisition

Active Publication Date: 2012-05-09
中交和美环境生态建设有限公司
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Problems solved by technology

[0013] The purpose of the present invention is to address the defects of low efficiency and poor accuracy of field measurement of high-precision surface information required for traditional highway detailed survey and construction drawing design, and to establish a regular digital elevation model for laser point clouds to obtain surface information. Defects in the cloud-generated section surface information, a new method is proposed to directly use the original point cloud scanned by high-precision lidar to generate the surface information required for highway survey and design

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  • Method for generating road design surface information by laser radar scan
  • Method for generating road design surface information by laser radar scan
  • Method for generating road design surface information by laser radar scan

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Embodiment 1

[0034] Describe the embodiment of the present invention below with the aid of accompanying drawing, specific working process is as follows figure 1 As shown, the description is as follows.

[0035] The first step, laser point cloud acquisition design 1;

[0036] For new highway projects, aircrafts are used as platforms to carry laser scanners for data collection. For highway reconstruction and expansion projects, you can choose a helicopter or a car as a platform to carry a laser scanner for data collection. The specific implementation methods of collecting data on different platforms are as follows:

[0037] When using an aircraft as a platform for data collection, task design is required. The specific implementation method is as follows:

[0038] 1) Data accuracy and density requirements. For new highway projects, the plane accuracy of laser radar scanning data results is better than 0.15m, the elevation accuracy is better than 0.10m, and the laser point density is high...

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Abstract

The invention discloses a method for generating road design surface information by laser radar scan, which comprises the following steps: a, an airplane or automobile is used for collecting data for a platform-carried laser scanner; b, original laser point cloud is classified to a ground point type and a non-ground point type; c, the point cloud data of the classified ground point types can be used for generating road surface information required by design; d, for regions with the point cloud density of the ground point type less than 4 / m<2>, an alternative point is automatically extracted from the non-ground point type point cloud; e, a sectional profile is taken as a projection surface, the extracted section point, ground point, non-ground point and alternative point are stacked for displaying, artificial auxiliary edit is carried out, in the section ground line, the alternative point is added, or an abrupt abnormal point is removed; and f, accurate section ground line surface information after editing is output according to a format required by the road design. The method of the invention has the advantages of rapidity, high efficiency and high stability; and is suitable for collecting information of construction, reconstruction and extension of various complex road surfaces.

Description

technical field [0001] The present invention relates to the technical field of highway surveying and design, and more specifically to a method for generating surface information required for highway survey and design by laser radar scanning. information extraction. Background technique [0002] Obtaining accurate and rich three-dimensional information (cross section, longitudinal section) of the surface is an important task in highway survey and design. The current method is to use the total station or GPS-RTK to measure the ground point or the ground line of the section required for the design in the field. This method requires a lot of manpower and material resources to generate highway surface information, and the efficiency is very low. [0003] With the continuous updating of surveying and mapping new technologies and equipment, various methods of obtaining surface information have been proposed. The more commonly used method is to use the digital elevation model to ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C7/04G06F17/50
Inventor 陈楚江李海亮赵喜安余绍淮明洋张霄王丽园
Owner 中交和美环境生态建设有限公司
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