Long-exposure oblique photography tunnel holographic measurement method

A technology of oblique photography and measurement methods, which is applied in the direction of measuring devices, surveying and navigation, instruments, etc., can solve the problems of low signal return rate, expensive equipment, laser scattering, etc., and achieve wide applicability, good compatibility, and convenient operation Effect

Active Publication Date: 2020-02-28
CHINA RAILWAY 12TH BUREAU GRP +1
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Problems solved by technology

[0002] Tunnel cross-section measurement is often carried out by total station or laser scanner, both of which use equipment to emit laser light and measure in polar coordinates. The equipment is expensive and can only obtain the surface contour data of the tunnel body, and cannot record geological information and blasting

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  • Long-exposure oblique photography tunnel holographic measurement method
  • Long-exposure oblique photography tunnel holographic measurement method
  • Long-exposure oblique photography tunnel holographic measurement method

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Embodiment Construction

[0070] The following will take the Chuanyanping horizontal tunnel of the Xinhuashan Tunnel of the Zhangjihuai Railway as an example to further describe the tunnel holographic measurement method of the present invention with long-exposure oblique photography.

[0071] Such as figure 1 As shown, the implementation steps of the long-exposure oblique photography tunnel holographic measurement method in this embodiment include:

[0072] 1) Mark the image control points and measure the coordinates when drilling and setting out the face;

[0073] 2) Long-exposure photography is used to collect cave body images from different angles, high resolution, and rock textures in low-light environments;

[0074] 3) For cave images with different angles, high resolution, and rock textures, by identifying feature points on multiple cave images, the space coordinates of feature points are calculated based on the multi-image space front intersection method and the points are spread to form a grid...

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Abstract

The invention discloses a long-exposure oblique photography tunnel holographic measurement method. The method comprises the following implementation steps: marking image control points and measuring coordinates during drilling and lofting of a tunnel face; collecting tunnel body images with different angles, high resolution and rock stratum textures in a low-illumination environment through the long-exposure photography; identifying feature points on a plurality of cave body images for cave body images, calculating space coordinates of the feature points based on a multi-image space forward intersection method, and expanding the points to form a grid surface model, so as to obtain a digital surface model carrying stratum information and cave body contour surface undulation. The method hasthe advantages that equipment is simple, operation is convenient and fast, environmental constraints are small, the tunnel body condition can be restored in a full-information mode, in-tunnel construction is not affected, and the application range is wide.

Description

technical field [0001] The invention relates to tunnel section measurement technology, in particular to a long-exposure oblique photography tunnel holographic measurement method. Background technique [0002] Tunnel cross-section measurement is often carried out by total station or laser scanner, both of which use equipment to emit laser light and measure in polar coordinates. The equipment is expensive and can only obtain the surface contour data of the tunnel body, and cannot record geological information and blasting parameters. 1. The laser scattering is serious in the water-rich environment, and the signal return rate is low. The geological survey of the face is still at the stage of geological sketches or local planar images. The subjective influence of geological records is great, and the overall traceability of geological conditions is not strong. "Measuring the section for the sake of measuring the section" essentially ignores the geological properties of the tunne...

Claims

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Application Information

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IPC IPC(8): G01C7/06G01C11/12
CPCG01C7/06G01C11/12
Inventor 张逆进陈志李世文曾贤平冯浩雄
Owner CHINA RAILWAY 12TH BUREAU GRP
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