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Detection apparatus and method for deformation and vibration of polygonal plate based on digital speckles

A digital speckle and detection device technology, applied in measuring devices, using optical devices, measuring ultrasonic/sonic/infrasonic waves, etc., can solve problems such as circuit noise and low efficiency, and achieve reduced detection costs, high measurement accuracy, and improved matching The effect of precision

Pending Publication Date: 2019-01-11
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

The above method can basically only realize single-point deformation detection, which is inefficient and introduces circuit noise

Method used

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  • Detection apparatus and method for deformation and vibration of polygonal plate based on digital speckles
  • Detection apparatus and method for deformation and vibration of polygonal plate based on digital speckles
  • Detection apparatus and method for deformation and vibration of polygonal plate based on digital speckles

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Effect test

Embodiment 1

[0049] With the development of machine vision, the use of visual inspection combined with digital speckle correlation method can quickly and comprehensively detect the surface deformation of the measured object. The collected speckle images on the surface of the object are processed, and the three-dimensional point cloud is reconstructed through two-dimensional matching and three-dimensional matching, and the three-dimensional spatial position change of the point cloud is calculated to realize the measurement of the object displacement field and deformation field. This detection method has no contact with the surface of the measured object and will not affect its deformation characteristics. Due to the denseness of speckle, it can realize the full-field measurement of the surface of the object, not limited to the single-point detection of ordinary sensors, and has great advantages in finding the maximum deformation point. It is outstanding for the deformation detection of large...

Embodiment 2

[0082] In this embodiment, the driving force application mechanism in Embodiment 1 can be replaced by a vibration driving mechanism, that is, this embodiment provides a polygonal plate vibration detection device based on digital speckle, which includes a polygonal plate, a vibration driving mechanism and a vibration The detection mechanism, the polygonal plate is sprayed with random speckles, the vibration driving mechanism and the polygonal plate are used to drive the polygonal plate to generate vibration, the vibration detection mechanism includes a binocular vision system and processing equipment, and the binocular vision system is used to detect the polygonal plate. For random speckle, the processing device is connected with a binocular vision system, and the polygonal plate vibration detection device of this embodiment can analyze and study the vibration characteristics of the polygonal plate. The rest of the structure is the same as the digital speckle-based polygon plate...

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Abstract

The invention discloses detection apparatus and method for the deformation and vibration of a polygonal plate based on digital speckles. The deformation detection apparatus comprises a polygonal plate, a driving force-applying mechanism, and a deformation detection mechanism. The polygonal plate is sprayed with random speckles. The driving force-applying mechanism is connected with the polygonal plate and used for driving the polygonal plate to perform linear reciprocating motion. The deformation detection mechanism comprises a binocular vision system for detecting random speckles on the polygonal plate, and a processing device connected with the binocular vision system. The deformation detection apparatus uses the random speckles sprayed on the polygonal plate as mark points, and visuallydetects the deformation of the polygonal plate, so that the advantage of non-contact is realized. The interference of circuit noise does not need to be introduced; the measurement precision is high;and comprehensive, rapid, and high-precision deformation detection of the polygonal plate and similar structures can be realized; in addition, vibration characteristics of the polygonal plate and similar structures can be detected visually.

Description

technical field [0001] The invention relates to a deformation detection device and a vibration detection device, in particular to a digital speckle-based polygon plate deformation detection device, vibration detection device and method, belonging to the field of deformation detection of flexible structures. Background technique [0002] Panels are the core part of solar power generation systems, and satellites usually use large rectangular panels to generate electricity. Recently, the polygonal plate has appeared in the research field of aviation due to its advantages of convenient folding and stretching. However, when the plate is launched or in normal operation, it is often subjected to changing driving force or resistance. Large-area panels are deformed. When the deformation is too large, it will cause the failure of the plate or affect the attitude of the satellite. Therefore, it is of great significance to study the deformation performance of the polygonal plate struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16G01H9/00
CPCG01B11/16G01H9/00Y02E10/50
Inventor 邱志成张文政
Owner SOUTH CHINA UNIV OF TECH
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