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A method and device for measuring the cross-section of expressway based on laser projection

A technology of laser projection and fast road, which is applied in the directions of measuring devices, photogrammetry/video metrology, section drawing, etc., can solve the problems of slow measurement speed and high labor cost, and achieve error avoidance, high operating efficiency, and post-maintenance low cost effect

Active Publication Date: 2020-08-07
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Application Information

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Problems solved by technology

The above methods all need to manually measure the section points sequentially, so the measurement speed is slow and the labor cost is huge

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  • A method and device for measuring the cross-section of expressway based on laser projection
  • A method and device for measuring the cross-section of expressway based on laser projection
  • A method and device for measuring the cross-section of expressway based on laser projection

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Embodiment Construction

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0038] see figure 1 and figure 2 , the present embodiment provides a laser projection-based fast road cross-section measurement device, which includes a carrier 10 , a laser transmitter 11 , a high-speed wide-angle camera 12 , a GNSS system 13 and an on-board computer 14 . In this embodiment, the carrier 10 is a measuring car traveling on the road to be measured, the laser emitter 11 is installed on the front end of the carrier 10, and is parallel to the axle of the carrier 10, and the high-speed wide-angle camera 12 is installed directly below the laser emitter 11 , the GNSS system 13 is installed on the upper end of the carrier 10 .

[0039] see image 3 and Figure 4 , the laser emitter 11 is provided with a laser emitting point P, and the laser ...

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Abstract

The invention provides a rapid road cross section measuring method and device based on laser projection. The method comprises the following steps: a carrier vehicle acquires a projection image of a laser line on a road surface in real time through a high-speed camera in a road driving process, and a close-range photogrammetry principle is used for resolving the image to obtain position informationof the laser projection line at the current moment relative to a carrier; and absolute parameter information of a measured road cross section is obtained through calculation according to a position and an attitude angle of the carrier, measured by a GNSS. The device comprises the carrier, a laser emitter, the high-speed wide-angle camera, the GNSS and a vehicle-mounted computer. The manual point-by-point measurement is not needed, so that errors caused by human factors are avoided; a vehicle-mounted system is higher in operation efficiency, good in continuity, relatively low in system equipment cost, simple in structure and relatively low in later maintenance cost; and the reliable GNSS positioning precision and the effective close-range photogrammetry algorithm can ensure relatively highmeasurement precision.

Description

technical field [0001] The invention belongs to the technical field of road cross-section measurement, in particular to a laser projection-based fast road cross-section measurement method and device. Background technique [0002] Road cross-section measurement is used to determine the terrain relief in the direction perpendicular to the road centerline. In highway surveying, the cross-section measurement of the line is a huge and tedious survey work. Nowadays, the main road cross-section measurement methods mainly include the level method, the total station method, and the GPS-RTK method. The above methods all require manual measurement of the cross-section points in sequence, so the measurement speed is slow and the labor cost is huge. In order to overcome the problems existing in the traditional cross-section measurement, the present invention proposes a method and device for measuring the cross-section of a vehicle-mounted expressway based on laser line projection, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C7/04G01C11/00
CPCG01C7/04G01C11/00
Inventor 张绍成方磊独士康
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)