Post-event attitude angle correction method for mobile laser scanning system
A technology of laser scanning and correction method, which is applied in the direction of using optical devices, instruments, measuring devices, etc., can solve the problems of not being applicable to the detection and correction of the mobile laser scanning system, and not involving the correction of the attitude angle of the mobile laser scanning system, to achieve The effect of improving the accuracy of point cloud acquisition
Active Publication Date: 2021-05-18
ZHEJIANG HUADONG SURVEYING MAPPING & GEOINFORMATION
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[0003] The Chinese patent application with the application number CN201610334363.8 discloses a "mobile three-dimensional laser scanning system and mobile three-dimensional laser scanning method", which introduces the composition and measurement method of the system in detail, but does not involve Research Contents of Attitude Angle Correction for Mobile Laser Scanning System
The Chinese patent application with the application number 201410826224.8 discloses a "three-dimensional scanner calibration system and its calibration method". Scanner, and needs to be carried out in a fixed calibration site, not suitable for the detection and calibration of the attitude angle of the mobile laser scanning system
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[0031] Such as Figure 1 ~ Figure 4 As shown, the present embodiment is a post-event attitude angle correction method for a mobile laser scanning system. In the shield tunnel 3, a section of straight shield tunnel without superelevation is selected to establish an on-site calibration field. type laser scanning system. The mobile laser scanning system consists of a scanner 1, a track car 2 and a track 4. The scanner 1 is fixed on the track car 2 and combined into a whole. The track car 2 can move back and forth on the track 4, and the track 4 is along the tunnel. The central axis is set at the bottom of the selected tunnel section. The start position QD and end position ZD are marked on the track. The direction from QD to ZD is the specified direction in this example. The straight track is to reduce the influence of the external environment on the attitude angle.
[0032] Such as Figure 5 As shown, the correction method of this embodiment includes the following steps:
[00...
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The invention relates to a post-post attitude angle correction method of a mobile laser scanning system to improve measurement accuracy, and is characterized in that: S01, setting one or more targets on the inner wall of the tunnel to facilitate point cloud identification; S02, using a mobile laser The scanning system scans the tunnel and the target in the forward direction along the specified direction; S03, rotates the mobile laser scanning system horizontally by 180 degrees; S04, uses the mobile laser scanning system adjusted in step S03 to scan in the opposite direction again along the specified direction Tunnel and the target; S05, calculate the roll angle and the pitch angle; S06, revise the collected point cloud model according to the calculated roll angle and pitch angle; S07, re-extract from the point cloud model after the angle correction The coordinates of the target center and the mileage of the feature point at the top of the tunnel. The invention is suitable for the field of three-dimensional laser scanning.
Description
technical field [0001] The invention relates to a post-event attitude angle correction method of a mobile laser scanning system. Applicable to the field of 3D laser scanning. Background technique [0002] The mobile laser scanning system consists of a scanner and a rail trolley. The scanner rotates in a vertical plane perpendicular to the central axis of the tunnel. When the scanning system is pushed forward, the point cloud model of the entire tunnel structure can be obtained. However, when the scanner When there is an attitude angle, the scanning section is not perpendicular to the central axis of the tunnel, and the scanned point cloud model is not the real structure of the tunnel. Therefore, it is of great significance for the application of this technology to study how to detect and correct the attitude angle of the mobile laser scanning system and avoid point cloud acquisition errors caused by the attitude angle. [0003] The Chinese patent application with the appli...
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IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 郑佳佳卢建军吴勇占晓明黄小斌王伟吴敏慧王庆峰沈建军顾晓卫周飞飞
Owner ZHEJIANG HUADONG SURVEYING MAPPING & GEOINFORMATION