Slope displacement monitoring method based on relative orientation and absolute orientation algorithms

A technology of relative orientation and displacement monitoring, which is applied in the interpretation of photos and the marking of measurement points, etc. It can solve problems such as the inability to arrange monitoring points, the inability to provide stable camera erection at the bottom of the slope, and the lack of pedestrian passages on the slope, etc., to achieve manual operation less, high degree of automation, and the effect of eliminating measurement errors

Active Publication Date: 2020-02-25
NANJING UNIV OF SCI & TECH
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Problems solved by technology

This method cannot be realized in some extreme geographical environments, such as: the slope is too steep and there is no walking path, which makes it impossible to deploy monitoring points; or the bottom of the slope cannot provide a stable area for camera erection, etc.

Method used

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  • Slope displacement monitoring method based on relative orientation and absolute orientation algorithms
  • Slope displacement monitoring method based on relative orientation and absolute orientation algorithms
  • Slope displacement monitoring method based on relative orientation and absolute orientation algorithms

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Embodiment Construction

[0015] Such as Figure 1-6 Shown, the present invention is a kind of slope displacement monitoring method based on relative orientation-absolute orientation algorithm, and its specific steps are as follows:

[0016] a. Equipment erection and preparation: Fix the non-measurement digital camera on the slope monitoring point, and set up relative orientation standard points within the field of view. In photogrammetry, the resolution of relative orientation uses the coordinates of six standard points. The positions of the standard points are as follows: image 3 . The coordinates of the measurement standard point in the ground photogrammetry coordinate system;

[0017] b. Photo acquisition: Take a standard point and get the left picture of this method. After a period of time, shoot the standard point again to obtain the right film of this method;

[0018] c. Input original data and preprocessing: preprocessing the left and right slices to obtain the image plane coordinates of t...

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Abstract

The invention belongs to the field of slope stability monitoring, and particularly relates to a slope displacement monitoring method based on relative orientation and absolute orientation algorithms.According to the method, a common non-measurement digital camera is used for shooting pictures, the camera is arranged at a slope monitoring point, and relative orientation standard control point locations are arranged in a field range which can be obtained by the camera. Photograph data shot in the same view field range are resolved and analyzed in different periods, and a relative orientation-absolute orientation double-image analysis method is utilized to resolve a photographic baseline component so as to measure the displacement of a monitoring point. The side slope displacement is measured through camera displacement, the automation degree is high, manual operation is relatively little, and the limitation of traditional measurement means under some extreme geographical conditions canbe overcome.

Description

technical field [0001] The invention belongs to the field of slope stability monitoring, in particular to a slope displacement monitoring method based on relative orientation and absolute orientation algorithms. Background technique [0002] Slope hazards refer to large-scale displacement of slopes under unstable conditions, resulting in landslides of mountains or soil. Monitoring the slope is an important means to ensure the stability of the slope. With the advancement of observation instruments and technologies, geodesy, instrument observation, GPS observation, and close-range photogrammetry have emerged. The photographic equipment for close-range photogrammetry is divided into professional measurement cameras and non-measurement cameras. The orientation elements in the measurement camera are known, can be accurately recorded, the imaging quality is high, and the calculation accuracy is high, but the operation is cumbersome and expensive; the non-measurement camera The i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/12G01C15/02
CPCG01C11/12G01C15/02
Inventor 石杏喜张末李吉珊
Owner NANJING UNIV OF SCI & TECH
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