Portable acoplane displacement measuring device

A technology of out-of-plane displacement and measuring instrument, which is applied in the direction of phase influence characteristic measurement, measuring device, instrument, etc., can solve the problems of increased workload and boring, etc., and achieve improved measurement accuracy, long coherent length, and good carrier contrast Effect

Inactive Publication Date: 2008-03-12
NO 711 RES INST CHINA SHIPPING HEAVY IND GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to reduce the image of the error on the result in this method, a large number of measurements in the same state have to be repeated, and then the average value is taken as the measurement result, which increases the workload (depending on the number of samples) and is also very boring.

Method used

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  • Portable acoplane displacement measuring device
  • Portable acoplane displacement measuring device

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Embodiment Construction

[0026] Please refer to Figure 2 and Figure 3. The portable out-of-plane displacement measuring instrument of the present invention includes an optical path part 2 and a computer part 3 . The optical path part 2 includes a housing 21 and a measuring element 22 arranged in the housing. The bottom of the housing is provided with supporting feet 211 . The measuring element includes a laser 221 , a beam expander 222 arranged behind the laser, a rectangular wedge mirror 223 and a carrier element 224 arranged sequentially behind the beam expander. It also includes an imaging device 225, a beam splitter 226 arranged at the rear side of the imaging device, and a phase shifter 227 connected to the beam splitter, and the output end of the phase shifter is connected to a computer. And also includes a diffuser mirror 228 arranged between the rectangular wedge mirror and the beam splitter.

[0027] The optical axes of the laser, the beam expander, the rectangular wedge mirror and the car...

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Abstract

A portable measurer of a coplanar displacement consists of measuring element including CCD shooting head, vavifocus ZOOM imaging lens, spectroscope, phase shifter connected to spectroscope and computer connected to output end phase shifter; laser; extender lens; rectangular wedge lens and wave carrier element .It features that two light paths are formed at front and back surface of said wedge lens as one path being reflected to target surface of CCD shooting head and another path being shined on surface of object to be measured .

Description

technical field [0001] The invention relates to a portable out-of-plane displacement measuring instrument. Background technique [0002] The portable out-of-plane displacement measuring instrument is also called electronic speckle interferometry (ESPI), the full name is Electronic Speckle Pattern Interferometry, which is a comprehensive technology combining computer image processing, laser and interference. [0003] The electronic speckle interferometer is widely used in the application, research and teaching experiments in the field of photomechanics. The non-contact measurement can obtain the fringes of the displacement field (W field) of the measured object away from the surface field, and provide reliable boundary conditions for the finite element. It can be used for structural optimization. Applied in the study of mesomechanics, residual stress measurement, and composite materials. Especially widely used in structural analysis and non-destructive testing. It obtains ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02G01B11/16G01N21/45
Inventor 张熹陆鹏吴君毅夏远富
Owner NO 711 RES INST CHINA SHIPPING HEAVY IND GRP
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