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Precise plane coordinate correction method in laser radar scanning measurement

A technology of laser radar and measurement plane, which is applied in measurement devices, radio wave measurement systems, road repair and other directions, can solve problems such as low positioning accuracy, and achieve the effects of high accuracy, improved accuracy and improved process flow

Active Publication Date: 2012-06-27
CCCC SECOND HIGHWAY CONSULTANTS CO LTD
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AI Technical Summary

Problems solved by technology

[0010] The purpose of the method of the present invention is to address the relatively low plane positioning accuracy of laser radar scanning measurement, and the defects of the laser radar point cloud data plane coordinate refinement processing method based on digital orthophoto images and lane markings, and propose a direct method. Based on the control points of the road surface, the precision correction method of the laser radar scanning measurement plane coordinates is easy to implement and easy to operate, and can improve the plane positioning accuracy of the laser radar scanning measurement by nearly 2 times

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  • Precise plane coordinate correction method in laser radar scanning measurement
  • Precise plane coordinate correction method in laser radar scanning measurement
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Embodiment Construction

[0031] Hereinafter, the method of the present invention will be further described in detail through specific implementation manners in conjunction with the drawings.

[0032] A method for precise correction of laser radar scanning measurement plane coordinates, the flow chart is as follows figure 1 Shown. The specific steps are elaborated as follows:

[0033] The first step, control logo design and spraying 1;

[0034] Before the lidar scan, firstly need to lay the control signs along the existing road surface as control points. The specific layout method is as follows:

[0035] a. Control the shape of the sign. The control flag shape is Shape or shape. The width of each side of the shape control mark is 0.15m, the length of the long side is 1.5m, and the length of the short side is 1.0m; The width of each side of the shape control mark is 0.15m and the length is 1.5m. The intersection of the two diagonal lines in the center of the control mark is the center position of the cont...

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Abstract

The invention discloses a precise plane coordinate correction method in laser radar scanning measurement. The method comprises the following steps of: a, designing and spraying a control sign: arranging control signs along the path in a staggered form on the two sides of a highway; b, selecting a control point for the feature signs formed by two crossed straight lines along the existing road; c, laser radar scanning: determining the laser radar scanning measurement mode; d, measuring a control point, wherein the control point plane measurement adopts GPS (global position system) static positioning measurement, and a net structure is formed; e, controlling sign extraction: accurately extracting the position of the laser radar point cloud data plane of the control sign by use of the information of the laser radar point cloud data; and f, precisely correcting the laser radar point cloud plane coordinate: performing precise plane coordinate processing on the laser data according to the GPS measurement result at the control point and the laser radar point cloud extraction result of the control sign. The method has high precision, low cost and high efficiency, and is easy to implement, simple and convenient to operate and suitable for precise plane coordinate correction in the laser radar scanning measurement for road reconstruction and expansion.

Description

Technical field [0001] The invention relates to the technical field of highway survey and design, and more specifically to a method for precise correction of the plane coordinates of the laser radar scanning measurement. The method can greatly improve the plane positioning accuracy of the laser radar scanning measurement, and can meet the requirements of road reconstruction without interrupting traffic. Expansion project construction requires accurate three-dimensional spatial information of existing roads. Background technique [0002] Accurate acquisition of three-dimensional information such as highways and their auxiliary structures is an important prerequisite for highway reconstruction and expansion. For highway reconstruction and expansion projects, in order to maximize the use of existing roads and realize the precise splicing of bridges, roadbeds and other structures, compared with new road projects, it has higher requirements for measurement accuracy. my country's exis...

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Application Information

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IPC IPC(8): E01C23/01G01S7/02G01S17/06
Inventor 陈楚江赵喜安余绍淮明洋李海亮张霄王丽园余飞
Owner CCCC SECOND HIGHWAY CONSULTANTS CO LTD
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