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Method and system for space roof truss damage detection

A damage detection and space technology, applied in the direction of optical testing flaws/defects, etc., can solve problems such as the inability to meet the needs of damage detection of space roof trusses

Inactive Publication Date: 2018-05-11
SHAOXING UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method or device has the following defects: First, it is required to know the location of the damage in advance; second, it is required that the equipment at the detected part can reach
However, in the existing technology of engineering practice, only a few low-order mode shape parameters can be collected, which cannot meet the needs of damage detection of space roof truss structures in many cases.

Method used

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  • Method and system for space roof truss damage detection
  • Method and system for space roof truss damage detection
  • Method and system for space roof truss damage detection

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Embodiment Construction

[0083] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.

[0084] In order to solve the above technical problems, an embodiment of the present invention provides a space roof truss damage detection system, including: a laser transmitter, used to emit laser light to the target node; a laser receiver, used to receive the reflected light of the target node; The parameter calculation module is used to convert the optical signal received by the laser receiver into the low-order natural mode shape of the vibration of the space roof truss, and calculate the damage parameters of each unit of the space roof truss according to the low-order natural mode shape of the vibration of the space roof truss . Among them, the laser transmitter and laser receiver realize the corresponding functions based on the dynamic data acquisition system.

[0085] figure 1 It is a schematic dia...

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Abstract

The invention relates to a method and a system for space roof truss damage detection. The method comprises the steps that a laser transmitter and a laser receiver are fixedly installed; the laser transmitter transmits to a target node; the laser receiver receives reflected light from the target node; according to the reflected light, vibration information of the target node is acquired; it is judged whether the number of the collected vibration information achieves the preset requirement, if yes, a next step is continued, if no, collecting is continued; according to low order natural mode of vibration of space roof truss vibration, a damage parameter of each unit of the space roof truss is calculated and obtained. According to the method and the system for space roof truss damage detection, by installing a dynamic data acquisition system, topological structure of a structure model can not be changed, by changing the position of the dynamic data acquisition system, enough vibration information can be obtained conveniently to satisfy the needs of damage detection, the defect of insufficient vibration information in an existing method is overcome, and the degree of accuracy of the detection is higher.

Description

technical field [0001] The present invention relates to the technical field of structural detection, in particular to the technical field of structural damage detection, in particular to a method and system for detecting damage to space roof trusses. Background technique [0002] Space truss structures are widely used in many industrial and civil buildings, such as tower cranes, transmission towers, space truss bridges, etc. Due to the increase in service life and the influence of environmental corrosion and disaster loads, the space roof truss structure will inevitably be damaged. It is necessary to make timely and accurate detection of the damage in the structure in order to facilitate maintenance and reinforcement to avoid catastrophic consequences. [0003] Most of the traditional damage mode detectors or devices use visible local experimental methods, such as ultrasonic methods, magnetic field methods, temperature field methods, and various devices using these methods. ...

Claims

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Application Information

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IPC IPC(8): G01N21/95
CPCG01N21/95
Inventor 冯晓东蒋舸
Owner SHAOXING UNIVERSITY
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