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A system and method for visual measurement and dynamic recognition of engineering structure angular displacement

A technology of engineering structure and identification method, which is applied in the direction of measuring device, image analysis, image enhancement, etc., can solve the problems of inconspicuous structural features, and achieve the effects of accurate and reliable results, rapid identification, and low test cost

Active Publication Date: 2022-02-15
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the structural vibration images taken in actual bridge engineering do not have any background and the characteristics of the structure itself are not obvious, so the existing methods are no longer applicable

Method used

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  • A system and method for visual measurement and dynamic recognition of engineering structure angular displacement
  • A system and method for visual measurement and dynamic recognition of engineering structure angular displacement
  • A system and method for visual measurement and dynamic recognition of engineering structure angular displacement

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Embodiment 1

[0054] This embodiment provides a visual measurement and power recognition system for the angular displacement of an engineering structure, which includes a UAV hardware system and a data analysis system. The dynamic image sequence; the data analysis system includes a structural angular displacement extraction module and a structural dynamic identification module based on images taken by a UAV. The structural angular displacement extraction module is used for dynamic displacement extraction of engineering structures, and the structural dynamic identification module is used for utilizing The modal analysis algorithm identifies the dynamic parameters of the structure's natural frequency, angular displacement mode shape, and macrostrain mode shape.

[0055] Such as figure 1 As shown, this embodiment provides a method for visual measurement and power recognition of engineering structure corner displacement, which includes the following steps:

[0056] 1. Dynamic displacement extr...

Embodiment 2

[0088] combine Figure 2~Figure 8 , through the case of simply supported beams to illustrate the specific implementation process of the method for measuring the angular displacement of engineering structures based on unmanned aerial vehicle visual imaging in this embodiment, the specific steps are as follows:

[0089] Vibration image data acquisition: The vibration image sequence of the engineering structure under external loads is captured by the camera carried by the UAV (such as figure 2 shown), in order to ensure that the vibration information covering the whole field of large structures can be photographed in sub-regions by means of mobile vision measurement.

[0090] Structural angular displacement measurement considering unmanned aerial vehicle disturbance elimination: based on the images taken by the unmanned aerial vehicle camera, the relative displacement of different measuring points of the structure relative to the unmanned aerial vehicle can be obtained by using ...

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Abstract

The present invention relates to the technical field of intelligent operation and maintenance of engineering structures, and relates to a system and method for visual measurement of engineering structure corner displacement and power recognition based on UAV airborne cameras. The system includes a UAV hardware system and a data analysis system; the method includes: 1. Dynamic angular displacement extraction of engineering structures; 2. Using modal analysis algorithm to identify dynamic parameters of the structure's natural frequency, angular displacement mode shape, and macro-strain mode shape. The invention can eliminate the influence of unmanned aerial vehicle disturbance on the angular displacement response of the structure, and can realize the rapid identification of the natural frequency, angular displacement mode shape, vertical displacement mode shape and strain mode shape of the large structure.

Description

technical field [0001] The invention relates to the technical field of intelligent operation and maintenance of engineering structures, in particular to a system and method for visual measurement and power recognition of engineering structure corner displacements based on unmanned aerial vehicle (UAV) airborne cameras. Background technique [0002] In recent years, UAVs have been widely used in the field of civil engineering due to their non-contact and strong mobility, especially in the automatic detection of bridge diseases. Researchers at home and abroad have applied UAVs to the crack detection of high-speed bridges and road surface disease detection. Using the UAV platform to carry cameras, they have found apparent defects such as water leakage, concrete shedding, delamination, and exposed corroded steel bars; in addition, there are Scholars used the infrared camera and color camera carried by the UAV platform to realize the delamination disease identification of the bri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/262G06T7/00G01B11/26G06F17/14G06F17/16
CPCG06T7/262G06T7/0004G01B11/26G06F17/14G06F17/16G06T2207/10016G06T2207/30132
Inventor 田永丁郭立平余志祥金云涛张丽君许浒赵雷
Owner SOUTHWEST JIAOTONG UNIV
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