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Mileage positioning method based on geometrical characteristic moving scanning data of lining cross section

A technology of geometric features and mobile scanning, applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems that the accuracy cannot meet the requirements, and achieve the effect of solving the lack of accuracy

Active Publication Date: 2016-11-23
SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has been found in practical applications that the accuracy of the mileage sensor is affected by factors such as tunnel curvature, and its accuracy cannot meet the requirements

Method used

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  • Mileage positioning method based on geometrical characteristic moving scanning data of lining cross section
  • Mileage positioning method based on geometrical characteristic moving scanning data of lining cross section
  • Mileage positioning method based on geometrical characteristic moving scanning data of lining cross section

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Experimental program
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Embodiment

[0031] Example: such as figure 1 As shown, this embodiment specifically relates to a mileage positioning method based on the geometric features of the lining section moving scanning data, which is used for mileage positioning of the scanning device 1 in the tunnel 2 . The scanning device 1 in the tunnel 2 is erected on the track 3 inside the tunnel 2 , and the track 3 is arranged along the axial direction of the tunnel 2 . During operation, the scanning device 1 moves along the axis of the tunnel 2 on the track. The scanning device 1 is separated by a predetermined time during the movement process The cross section of the tunnel 2 is scanned, and the cross section of the tunnel 2 scanned by the scanning device 1 is perpendicular to the axis of the tunnel 2 .

[0032] Tunnel 2 is assembled by multi-section prefabricated ring pieces, the ring pieces of tunnel 2 are connected by bolts, and the inner surface of the ring pieces is provided with bolt holes; since the ring piece i...

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PUM

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Abstract

The invention discloses a mileage positioning method based on geometrical characteristic moving scanning data of a lining cross section. The method comprises the following steps: 1) moving a scanning device along a tunnel axis direction and scanning the cross section of the tunnel by the scanning device at preset time interval in the moving process; 2) estimating a moving distance of the scanning device at preset time according to the data of a plurality of tunnel cross sections; 3) adding the moving distance to the mileage data of the scanning device after the scanning device completes the scanning for the tunnel cross section at each time. The mileage positioning method provided by the invention has the advantages that the mileage data of the scanning device can be accurately acquired according to the scanning result of the scanning device and the problem of insufficient precision caused by precision of mileage sensor influenced by tunnel curvature in the prior art is solved.

Description

technical field [0001] The invention belongs to the field of building construction, and in particular relates to a mileage positioning method based on moving scanning data of a lining section geometric feature. Background technique [0002] When the scanner performs mobile scanning, in order to obtain the real-time location information of the scanner, a GPS real-time positioning system is often installed in the mobile 3D laser scanning platform, but in the tunnel, the GPS signal cannot reach, so it cannot be positioned by GPS. [0003] In view of the fact that the purpose of tunnel scanning measurement is to obtain pipe wall images and tunnel cross-sectional data, generally, tunnel mobile scanning only needs to determine the mileage information of the scanner along the central axis. Therefore, the conventional method is to add a mileage sensor on the rail car to determine the mileage information of the scanner. However, it has been found in practical applications that the a...

Claims

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Application Information

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IPC IPC(8): G01B11/03
CPCG01B11/03
Inventor 许正文程胜一王令文郭春生
Owner SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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