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Device and method of perspective measurement of distribution of out-of-plane displacement field in resin matrix composite

A technology of out-of-plane displacement field and composite materials, which is applied in the field of mechanical performance measurement and non-destructive testing of composite materials, and can solve problems such as imperfect process implementation

Active Publication Date: 2014-01-22
GUANGDONG UNIV OF TECH
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  • Application Information

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Problems solved by technology

Due to various reasons such as impurities, imperfect process implementation, etc., there may be defects inside the resin matrix composite components

Method used

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  • Device and method of perspective measurement of distribution of out-of-plane displacement field in resin matrix composite
  • Device and method of perspective measurement of distribution of out-of-plane displacement field in resin matrix composite
  • Device and method of perspective measurement of distribution of out-of-plane displacement field in resin matrix composite

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with examples and drawings, but the protection scope of the present invention should not be limited.

[0053] Such as figure 1 As shown, the measurement system based on Michelson dry measurement of the off-plane displacement field distribution inside the resin-based composite material includes a laser controller (1) of model LDC-3724C (ILX Lightwave) and a temperature control module TCLDM9 (Thorlabs) The model is LD-0860-0150-DFB-1 (Toptica) laser (2), a convex lens (3) with a diameter of 25.4mm and a focal length of 50mm. The size is 25.4mm×25.4mm×25.4mm and the splitting ratio is 50: 50 beam splitter prism (4), 25.4mm diameter polarizer (5) BK7 glass reference wedge (6) with a diameter of 30mm, a thickness of 6mm, and an inclination of 6'. The pixel is 1024×1024 and the model is CCD-1300QFB (VDS Vosskuhler Company) CCD camera (7), computer (8) and loading device (9).

[0054] figure 1 The dotted line in ...

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Abstract

The invention discloses a device and a method of perspective measurement of distribution of an out-of-plane displacement field in a resin matrix composite. The device is an optical system designed with Michelson multi-surface interference, and a double-surface optical wedge is introduced into a reference arm end, so that an interference image between the optical wedge and a reflected signal in the measured resin matrix composite is formed. The optical wedge has two effects, and is firstly used for monitoring a laser wave number k and is secondly used for providing an interferential reference plane. Through temperature scan, the wave number of output laser of a semiconductor laser controller is scanned, and meanwhile, multiple frames of interference images are shot by a CCD (Charged Coupled Device) camera. Fourier transform is respectively carried out on interference image sequences before and after loading, the distribution of the out-of-plane displacement field in the measured resin matrix composite component can be demodulated through a phase difference corresponding to an interference peak value. The device and the method have the advantages that the perspective measurement can be realized, and the measuring precision of the out-of-plane displacement field is high, so that a novel technology platform for the mechanical property measurement and the nondestructive testing in the resin matrix composite is provided.

Description

Technical field [0001] The present invention relates to a device and method based on laser wave number scanning and optical Michelson multi-surface interferometry. It is mainly used to measure transparent or translucent resin-based composite materials, especially for measuring the internal separation of glass fiber reinforced resin-based composite materials before and after loading. The surface displacement field distribution belongs to the field of composite material mechanical property measurement and non-destructive testing. technical background [0002] As the application proportion of resin-based composites in the aviation and aerospace fields continues to increase, higher and higher requirements are put forward for their mechanical properties. Due to various reasons such as impurities, imperfect process implementation and other factors, there may be defects in the resin matrix composite components. Therefore, it is necessary to analyze and measure the internal mechanical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02
Inventor 周延周徐金雄刘羽飞
Owner GUANGDONG UNIV OF TECH
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