CN200962029Y - 3D distortion measurement system based on bundle optical fiber - Google Patents
3D distortion measurement system based on bundle optical fiber Download PDFInfo
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- CN200962029Y CN200962029Y CN 200620044106 CN200620044106U CN200962029Y CN 200962029 Y CN200962029 Y CN 200962029Y CN 200620044106 CN200620044106 CN 200620044106 CN 200620044106 U CN200620044106 U CN 200620044106U CN 200962029 Y CN200962029 Y CN 200962029Y
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Abstract
The utility model relates to a three-dimensional strain measuring system based on splitting optical fibers, comprising an optical maser providing light source, a graphic receiving system with a CCD camera, and a light splitting, conducting and phase-shift system, wherein the light splitting, conducting and phase-shift system is a light splitting, conducting and phase-shift system that splits the light into five beams. Through switching the shielding switch on the output of the fibers, the strain measuring the object in the direction perpendicular to the plane of the object, the horizontal direction and the anti-central direction can be achieved. The utility model has a rational compact construction, easy operation, which is applicable to the three-dimensional strain real-time measurement of the object surface.
Description
Technical field
The utility model relates to the optical 3-dimensional deformation measuring system, particularly a kind of measurement system for three-dimensional deformation based on splitting optical fiber.
Background technology
Along with the development of work, people to material stressed after, the research of performance parameters such as the distortion of generation, stress, strain requires also to improve constantly.Can only be applied to metal stresses scale that object point measures to speckle The Application of Technology that can Measuring Object face zone from the past.Utilize the speckle technology that there have been many methods hardware system and the deformation process scheduling algorithm processing aspect that object carries out the deformation measurement of bidimensional or three-dimensional.
In the present at home document record, the technology of electronic speckle pattern interferometry commercial measurement body surface three-dimensional anamorphotic system is: adopt three laser instruments to shine to provide radiation source, the reference substance that irradiation testee and its side are placed from three different directions.Promote to stick on three catoptrons above the reference substance with PZT phase-shifter, being used to provides the reference light of corresponding three beams thing light interference and introduces phase shift.Before ccd video camera, place the big shearing prism, make the information on body surface information and the reference substance all enter among the CCD, in conjunction with four step phase-shifting techniques, three laser instruments shine measured object successively respectively, and the speckle pattern of being gathered is carried out computing and separate obtaining three independently deformation fields.But this system is because the quantity of laser instrument is many, and structure is huge, and three level crossing directions on the reference substance are adjusted difficulty, and because the separating effect of big shearing prism may influence the speckle image quality, and this system can not carry out the measurement of one dimension or two dimension separately.
In patent US 6188483 B1, measure in the system of three-dimensional object surface distortion, utilize a laser instrument that light source is provided, utilize spectroscope and reflective mirror characteristic, carry out beam split, pass light.Two twin-beam electronics diffusing class interference system and a surface deformation detection system are attached in the system, rely on four bundle laser beam finished surface internal strains of outgoing to detect respectively, and utilize a branch of and inner another light beams in the four bundle laser to constitute the surface deformation detection system.With the electronic speckle figure that obtains before and after the distortion use directly cut algorithm mutually handle after, obtain the 3 D deformation data.This system can carry out the measurement of one dimension, two dimension or 3 D deformation separately.Shortcoming is to adopt discrete element to carry out beam split, pass light, and optical device is various, and optics positions is placed the accuracy requirement height, and system debug precision prescribed height is adjusted operating difficulties.
The utility model content
The purpose of this utility model is at the defective that exists in the prior art, and a kind of improved measurement system for three-dimensional deformation based on splitting optical fiber is provided, and is simple in structure, easy to operate, and can guarantee measuring accuracy.
In order to achieve the above object, design of the present utility model is:
The utility model is primarily aimed at hardware system and improves and innovate, adopt one fen five type optical fiber to carry out beam split, pass light, getting wherein, four bundle branch optical fibers constitute two opposite internal strains detections, by being scheduled to of optical fiber exit ports angle of divergence parameter, can directly be met the divergent beams of system requirements, need not beam expander spare.In order to improve the deformation measurement precision, still adopt four step phase shift algorithm, adopt traditional introducing phase shifting method, in above-mentioned two pairs of coherent light beams, select wherein a branch of branch optical fiber exit ports position to paste a PZT phase-shifter respectively respectively, promotion by the PZT phase-shifter drives the branch optical fiber fine motion, just can introduce phase shift in this light beam.The light beam of shared wherein a branch of introducing phase shift in conjunction with the 5th bundle branch optical fiber, obtains to satisfy the coherent light beam of system requirements.Therefore, entire system is owing to the employing of optical fiber, and structure is simplified greatly, debugging operations is convenient, because the use of blocking switch, this system can carry out the measurement of one dimension, two dimension or 3 D deformation separately, and make the software configuration of image post-processed simply, and guaranteed measuring accuracy.
According to above-mentioned utility model design, the utility model adopts following technical proposals:
A kind of measurement system for three-dimensional deformation based on splitting optical fiber, pass light and Phase Shifting System is formed by the image receiving system of a laser instrument that light source is provided, a band ccd video camera and beam split, it is characterized in that described beam split passes light and Phase Shifting System is one fen five type optical fibre light splitting biography light and Phase Shifting System; The structure that above-mentioned one minute five type optical fibre light splitting passes light and Phase Shifting System is: the main fiber that comes from described laser instrument connects one fen fiber coupler input port of five through a fiber adjusting mount, the output port of fiber coupler connects five bundle fiber optic taps to carry out beam split and pass light: a branch of branch optical fiber is connected the image receiving system of described band ccd video camera, the output port of four bundle branch beams respectively has a light beam irradiates device to aim at testee respectively, wherein two light beam irradiates devices are respectively pasted a PZT phase-shifter respectively, expansion by the PZT phase-shifter is moved, the light beam irradiates device that drives its stickup moves, and phase shift is introduced in the light beam; The structure of the image receiving system of described band ccd video camera is: from described laser instrument (1) outgoing beam through a microscope (2) and fiber adjusting mount (3), pass light by optical fiber (11), by spectroscope (7) beam split, spectroscope (7) places between ccd video camera (6) and the CCD camera lens (8) light beam after protecting bundle collimating mirror (10), blocking switch (9).
The structure of above-mentioned light beam irradiates device is: after branch optical fiber was fixed on the fiber adjusting mount, its outgoing beam was adjusted light intensity through attenuator, passed an iris and one and blocked switch and be radiated on the testee surface.
Above-mentioned ccd video camera connects a computing machine.
The utility model is compared with existing three-dimensional electronic speckle deformation detection system, has following conspicuous characteristics and advantage: adopted one minute five type optical fibre light splitting in the utility model system, passed light; Shared a branch of divided beams; Be met two of requirement of experiment by two PZT phase-shifters and restraint the laser beam that to introduce phase shift.By the beam split of optical fiber, three pairs of coherent light beams that the system that just can obtain is required.The required optical device of the utility model is few, and compactness rational in infrastructure is easy and simple to handle, is applicable to that the quasi real time 3 D deformation of body surface is measured.
Description of drawings
Fig. 1 is the system architecture synoptic diagram of an embodiment of the utility model.
Fig. 2 is the structural representation that one minute five type optical fibre light splitting in Fig. 1 example passes light and Phase Shifting System.
Fig. 3 is the structural representation of the light beam irradiates device in Fig. 1 example.
Embodiment
A preferred embodiment of the present utility model is: referring to Fig. 1, this passes light based on the measurement system for three-dimensional deformation of splitting optical fiber by the image receiving system of a laser instrument that light source is provided 1, a band ccd video camera 6 and beam split and Phase Shifting System is formed, described beam split, passes light and Phase Shifting System is one fen five type optical fibre light splitting biography light and Phase Shifting System.
The structure that above-mentioned one minute five type optical fibre light splitting passes light and Phase Shifting System is: connect one fen fiber coupler 4 input port of five from the main fiber of described laser instrument 1 through a fiber adjusting mount 3, the output port of fiber coupler 4 connects five bundle fiber optic taps 11,12,13,14,15 carry out beam split and pass light: a branch of branch optical fiber 11 is connected the image receiving system of described band ccd video camera 6, four bundle branch beams 12,13,14,15 output port respectively has a light beam irradiates device 20,21,19,18 aim at testee 22 respectively, two light beam irradiates devices 19 wherein, 18 respectively paste a PZT phase-shifter 17 respectively, 16, by PZT phase-shifter 17,16 expansion is moved, drive the light beam irradiates device 19 of its stickup, 18 move, and phase shift is introduced in the light beam.
The structure of above-mentioned light beam irradiates device 19,18 is: after branch optical fiber 14,15 is fixed on the fiber adjusting mount 23, its outgoing beam is adjusted light intensity through an attenuator 24, passes an iris 25 and one and blocks switch 26 and be radiated on testee 22 surfaces.
The structure of the image receiving system of above-mentioned band ccd video camera 6 is: from described laser instrument 1 outgoing beam through a microscope 2 and fiber adjusting mount 3, pass light by optical fiber 11, light beam through beam-expanding collimation mirror 10, block switch 9 after by spectroscope 7 beam split, spectroscope 7 places between ccd video camera 6 and the CCD camera lens 8.
Above-mentioned ccd video camera 6 connects a computing machine 5.
The image receiving system of above-mentioned laser instrument 1, band ccd video camera and one minute five type optical fibre light splitting pass light and Phase Shifting System all form components and parts and be installed on the base plate 27.
Above-mentioned fiber coupler 4 claims splitter again, is to divide element in the bar optical fiber at the most with the light signal from an optical fiber, and we mainly use it and carry out beam split in system, pass light.In the native system, adopt starlike/tree-shaped fiber coupler,, with five optical fiber and burn and melt stretching together, make the polymerization of nuclear core together, to reach the optically-coupled effect by the facture of sintering processing.The length of drawing awl by adjustment, and, realize the energy proportion of optical fibre light splitting to the control of sintering temperature, with reach native system to the ratio of five bundle branch beam energy near impartial requirements.
Principle of work of the present utility model
As shown in Figure 1, laser instrument 1 provides LASER Light Source, and after laser beam focused on through microscope 2, the adjustment by fiber adjusting mount 3 made light beam enter the main fiber of one minute five fiber coupler 4, obtains 11,12,13,14,15 5 light beams.Light beam 11 enters spectroscope 7 by blocking switch 9 after by beam-expanding collimation device 10 beam-expanding collimations; Light beam 12 and 14 is placed in the surface level and about body surface normal symmetrical illumination testee 22, and wherein the output port of light beam 14 is pasted with PZT phase-shifter 17 so that phase shift is introduced in the light beam 14, horizontal direction deformation detection system in the formation face; Light beam 13 and 15 is placed in the vertical plane and about body surface normal symmetrical illumination testee 22, and wherein the output port of light beam 15 is pasted with PZT phase-shifter 16 so that phase shift is introduced in the light beam 15, vertical direction deformation detection system in the formation face.Block switch 26 what the output end position of light beam 12,13,14,15 had light beam irradiates device 20,21,19,18 respectively, the order that controlled deformation detects is carried out.
In the said system, behind the light beam irradiates device 20,21,19,18 that the process structure is identical respectively behind branch beam 12,13,14,15 outgoing beams, shine on the testee.As shown in Figure 3, branch beam 12,13,14,15 is fixed on the fiber adjusting mount 23, after the divergent beams of outgoing are adjusted light intensity through attenuator 24, is radiated on the body surface after passing diaphragm 25 and blocking switch 26.
In the said system, the data acquisition operation steps is: at first, carry out vertical direction deformation detection in the face, open and to block switch 26 on the light beam irradiates device 18,21, close to block and block switch 26 on switch 9 and the light beam irradiates device 19,20, make vertical direction deformation detection system in light beam 13 and the 15 formation faces; Then, carry out horizontal direction deformation detection in the face, close and block switch 26 on the light beam irradiates device 18,21, open and block switch 26 on the light beam irradiates device 19,20, block switch 9 and still be in closed condition, make horizontal direction deformation detection system in light beam 12 and the 14 formation faces like this; At last, carry out surface deformation and detect, close and block switch 26 on the light beam irradiates device 18,20,21, open and block switch 9, make light beam 11 and 14 constitute the surface deformation detection systems.Image on the target surface of ccd video camera 6 through CCD camera lens 8 from the testee beam reflected, and then image is transferred to computing machine 5 carries out data processing.
Claims (3)
1. measurement system for three-dimensional deformation based on splitting optical fiber, pass light and Phase Shifting System is formed by the image receiving system of a laser instrument (1) that light source is provided, a band ccd video camera (6) and beam split, it is characterized in that described beam split passes light and Phase Shifting System is one fen five type optical fibre light splitting biography light and Phase Shifting System; The structure that described one minute five type optical fibre light splitting passes light and Phase Shifting System is: the main fiber that comes from described laser instrument (1) connects one fen fiber coupler (4) input port of five through a fiber adjusting mount (3), the output port of fiber coupler (4) connects five bundle fiber optic taps (11,12,13,14,15) carry out beam split and pass light: a branch of branch optical fiber (11) is connected the image receiving system of described band ccd video camera (6), four bundle branch beams (12,13,14,15) output port respectively has a light beam irradiates device (20,21,19,18) aim at testee (22) respectively, two light beam irradiates devices (19 wherein, 18) respectively paste a PZT phase-shifter (17 respectively, 16), by PZT phase-shifter (17,16) expansion is moved, drive the light beam irradiates device (19 of its stickup, 18) move, phase shift is introduced in the light beam; The structure of the image receiving system of described band ccd video camera is: from described laser instrument (1) outgoing beam through a microscope (2) and fiber adjusting mount (3), pass light by optical fiber (11), by spectroscope (7) beam split, spectroscope (7) places between ccd video camera (6) and the CCD camera lens (8) light beam after protecting bundle collimating mirror (10), blocking switch (9).
2. the measurement system for three-dimensional deformation based on splitting optical fiber according to claim 1, the structure that it is characterized in that described light beam irradiates device (19,18) is: after branch optical fiber (14,15) is fixed on the fiber adjusting mount (23), its outgoing beam is adjusted light intensity through an attenuator (24), passes an iris (25) and one and blocks switch (26) and be radiated on testee (22) surface.
3. the measurement system for three-dimensional deformation based on splitting optical fiber according to claim 1 is characterized in that described ccd video camera (6) connects a computing machine (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620044106 CN200962029Y (en) | 2006-07-21 | 2006-07-21 | 3D distortion measurement system based on bundle optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200620044106 CN200962029Y (en) | 2006-07-21 | 2006-07-21 | 3D distortion measurement system based on bundle optical fiber |
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| CN200962029Y true CN200962029Y (en) | 2007-10-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832760A (en) * | 2010-04-23 | 2010-09-15 | 清华大学 | Remote three-dimensional micro-deformation visual on-line monitoring method and system |
| CN102294543A (en) * | 2011-06-22 | 2011-12-28 | 北京工业大学 | Method for observing transparent melt layer in material laser-cutting process |
| CN102506735A (en) * | 2011-10-28 | 2012-06-20 | 上海大学 | Transient three-dimensional deformation measurement system based on three-color laser |
| CN103575236A (en) * | 2013-11-08 | 2014-02-12 | 湖北汽车工业学院 | Miniature three-dimensional measurement system based on double-core optical fiber interference fringes |
| CN103727891A (en) * | 2014-01-10 | 2014-04-16 | 合肥工业大学 | Synchronous three-dimensional speckle interferometric measurement system and method |
| CN110388884A (en) * | 2019-07-24 | 2019-10-29 | 中国科学院半导体研究所 | Structured Illumination three-dimensional measuring apparatus |
-
2006
- 2006-07-21 CN CN 200620044106 patent/CN200962029Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832760A (en) * | 2010-04-23 | 2010-09-15 | 清华大学 | Remote three-dimensional micro-deformation visual on-line monitoring method and system |
| CN101832760B (en) * | 2010-04-23 | 2011-12-07 | 清华大学 | Remote three-dimensional micro-deformation visual on-line monitoring method and system |
| CN102294543A (en) * | 2011-06-22 | 2011-12-28 | 北京工业大学 | Method for observing transparent melt layer in material laser-cutting process |
| CN102294543B (en) * | 2011-06-22 | 2014-04-09 | 北京工业大学 | Method for observing transparent melt layer in material laser-cutting process |
| CN102506735A (en) * | 2011-10-28 | 2012-06-20 | 上海大学 | Transient three-dimensional deformation measurement system based on three-color laser |
| CN103575236A (en) * | 2013-11-08 | 2014-02-12 | 湖北汽车工业学院 | Miniature three-dimensional measurement system based on double-core optical fiber interference fringes |
| CN103727891A (en) * | 2014-01-10 | 2014-04-16 | 合肥工业大学 | Synchronous three-dimensional speckle interferometric measurement system and method |
| CN103727891B (en) * | 2014-01-10 | 2016-08-31 | 合肥工业大学 | Synchronize three-dimensional speckle interferometer measuration system and measuring method |
| CN110388884A (en) * | 2019-07-24 | 2019-10-29 | 中国科学院半导体研究所 | Structured Illumination three-dimensional measuring apparatus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071017 Termination date: 20100721 |