Video recorder network shooting measurement method and apparatus for large structure attitude and displacement deformation

A camera measurement and structure technology, applied in the fields of digital camera measurement, computer vision, deformation monitoring, can solve the problems of low degree of automation, large labor, low measurement efficiency, etc., and achieve the effect of high degree of digitalization

Active Publication Date: 2009-08-12
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Strict visibility conditions are required. Usually, one instrument can only measure one-dimensional deformation, and multiple measurements with multiple instruments are required to determine three-dimensional deformation;
[0005] 2. Absolute positioning cannot be given while measuring deformation;
[0006] 3. The workload is large, the degree of automation is low, and the real-time performance is poor;
[0007] 4. It is greatly affected by the external environment, and the measurement efficiency is low
Large-scale structures in real situations are generally more complex, and the measu...

Method used

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  • Video recorder network shooting measurement method and apparatus for large structure attitude and displacement deformation
  • Video recorder network shooting measurement method and apparatus for large structure attitude and displacement deformation
  • Video recorder network shooting measurement method and apparatus for large structure attitude and displacement deformation

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Embodiment 1

[0050] Embodiment 1: The principle of the camera network camera measurement method for attitude and displacement deformation of large structures is as follows figure 1 As shown, the black solid line in the figure indicates the obstacle, and the dotted line indicates the shooting light path of each camera. The camera network camera measurement device includes a network node composed of a measurement reference B, a measurement base station N1-N3, and a target G1-G6 to be measured. Camera measurement provides a globally unified reference coordinate system; in this embodiment, the measurement reference B is formed by the fixed connection of artificial cooperation marks, cameras, and laser range finders; the measurement base station is used as a transit node in the camera network nodes, The base station N1 is composed of two cameras and two laser range finders, and the measurement base stations N2 and N3 are composed of multiple cameras and artificial cooperation marks; the measure...

Embodiment 2

[0059] Embodiment 2: as image 3 As shown in Fig. 1, the multi-point deformation of a large hull is measured using the camera network camera measurement method. The measurement reference B is generally selected as the main inertial navigation system located inside the hull, and the target to be measured Gi (i=1, 2, 3, ...) can be selected as various weapons and equipment and radars arranged on the deck, or as The key parts of the hull of interest, N1-N3 are the measurement base stations. By laying out a certain camera network along the structure of the hull, the deformation data of various parts of the hull can be obtained in real time without changing the hull structure, and the parameters of weaponry and radar can be corrected.

Embodiment 3

[0060] Embodiment 3: as Figure 4 As shown, the multi-point deformation of underground engineering is monitored by using the camera network camera measurement method. For the real-time monitoring of deformation data during the construction of underground projects such as subways and tunnels that cannot be reached by GPS signals, and the opening and operation of key places such as subway stations, the measurement base station Ni (i=1, 2, 3, ... ) can simultaneously measure the absolute position (attitude) of each target to be measured Gi (i=1, 2, 3, ...) relative to the ground reference B (the iron tower on the ground in the figure) and the relative relationship between each target to be measured Position (posture) relationship, so as to provide support for the smooth development of engineering construction and timely warning of dangers such as ground subsidence and collapse.

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Abstract

The invention discloses a method and a device for measuring the attitude and displacement deformation of a large structural body through network image pickup of cameras, wherein a camera network is well laid out according to the measuring requirements and the actual conditions. The device comprises a computing control center and network nodes, wherein the network nodes generally consist of attribute blocks and cameras (groups), which are fixedly connected with each other. The method comprises: demarcating camera parameters of measuring base stations at all levels before test, and demarcating relative position attitude parameters between the attribute blocks and the cameras, position attitude parameters of the attribute blocks or the cameras, which are fixedly connected with a measuring reference, relative to the reference coordinate system, and the like; triggering the cameras in real time for image pickup by the control center; and sending data to the control center, resolving the three-dimensional position attitude of an object to be measured relative to the measuring reference through the three-dimensional position attitude between various adjacent measuring base stations, and outputting the measuring result so as to dynamically and precisely measure the spatial structure, the spatial position, the attitude and the deformation of the large structural body in real time.

Description

technical field [0001] The invention relates to the fields of digital camera measurement, computer vision, deformation monitoring, etc., and further refers to the high-precision real-time automatic monitoring and measurement of large-scale structural body attitude and displacement deformation by using the method of camera network camera measurement. Background technique [0002] In practical applications, it is of great value and significance to monitor the attitude, displacement and deformation of large structures in real time and accurately for force analysis, structural modeling, and safety monitoring. [0003] In the civil field, during the construction of subways, tunnels, bridges, and dams, if the surrounding rock deformation or even collapse accidents occur due to geological or construction reasons, it will often cause heavy casualties and property losses. Real-time measurement and monitoring of large structures such as rock deformation. During the construction and o...

Claims

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Application Information

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IPC IPC(8): G01B11/00G01B11/16
Inventor 于起峰晁志超姜广文伏思华尚洋
Owner NAT UNIV OF DEFENSE TECH
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