CN203534539U - Two-dimension digital speckle measuring instrument - Google Patents
Two-dimension digital speckle measuring instrument Download PDFInfo
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- CN203534539U CN203534539U CN201320670086.XU CN201320670086U CN203534539U CN 203534539 U CN203534539 U CN 203534539U CN 201320670086 U CN201320670086 U CN 201320670086U CN 203534539 U CN203534539 U CN 203534539U
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- China
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- video camera
- ccd video
- digital speckle
- testing jig
- optical table
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Abstract
The utility model discloses a two-dimension digital speckle measuring instrument. The instrument comprises a horizontally arranged optical table. The optical table is provided with a testing jig used for fixing an object under test and a CCD camera used for shooting the object under test. The CCD camera is in electric connection with a computer. The optical table is further provided with an LED cold light source used for emitting light on the object under test disposed on the testing jig, and a loading device used for applying load on the object under test disposed on the testing jig. The instrument is simple and reasonable in structure, and can be widely applied to scientific research activities to play an important role.
Description
Technical field
The utility model relates to a kind of two-dimensional digital speckle measurement instrument, for the accurate measurement to deformation of body rear surface micrometric displacement amount.
Background technology
High-precision two-dimensional surface intrinsic displacement and strain measurement method based on Digital image technology (DICM) were being developed rapidly in the last few years, the method has that whole audience noncontacting measurement, precision are high, wide accommodation, measurement environment is required to the advantages such as low, thereby has a wide range of applications in theoretical research and Practical Project.
For the quantitative test of the deformation fields such as biomaterial, wood materials, paper and nano-coating material, more existing surveying instruments are generally difficult to realize, and more existing speckle interferometers all have the shortcoming of complex structure, complex operation.
Summary of the invention
The utility model object is: for the problems referred to above, provide a kind of two-dimensional digital speckle measurement instrument based on digital image processing techniques, it has simple in structure, easy to operate feature.
The technical solution of the utility model is: it comprises horizontally disposed optical table a kind of two-dimensional digital speckle measurement instrument, this is furnished with above optical table: for the testing jig of fixing examined object and for taking the ccd video camera of described examined object, described ccd video camera is electrically connected to computing machine, also comprise to the LED cold light source of examined object irradiation light fixing on described testing jig, also comprise to the LED cold light source of examined object irradiation light fixing on described testing jig and to the charger of examined object load application fixing on described testing jig.
Described LED cold light source has two.
The power of described LED cold light source is 150W.
Described testing jig is detachably fixed on described optical table by screw, and described ccd video camera is also detachably fixed on described optical table by screw.
Described ccd video camera adopts the digital camera that resolution is 1280 * 1024.
Described ccd video camera adopts telecentric lens.
Effective measurement area of described ccd video camera is 50 * 70mm2～250 * 350mm2, and effectively measuring distance is 0.5m～2.5m.
The utility model has the advantages that:
1, this two-dimensional digital speckle of the utility model correlation-measuring instrument adopts digital picture measuring technique to complete the measurement to examined object surface two-dimensional surface internal strain amount, meet the full field deformation measure on the surfaces such as large scale structure, material sample simultaneously, obtain surface strain and distribute.In addition, this instrument can have many application aspect the quantitative tests of deformation field such as biomaterial, wood materials, paper and nano-coating material and the test of the mechanical behavior of material and analysis.
2, this two-dimensional digital speckle of the utility model correlation-measuring instrument, aspect teaching, not only can be used for the experimental teaching of the mechanics of materials and Experimental Mechanics course, simultaneously can demonstration and verification displacement reciprocal theorem by three-point bending test; This instrument can be widely used in scientific research activity, and plays a significant role.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is the structure diagram of the utility model embodiment.
Fig. 2 is the measuring principle figure of the utility model embodiment.
Wherein: a-examined object, 1-optical table, 2-testing jig, 3-CCD video camera, 4-computing machine, 5-LED cold light source.
Embodiment
Embodiment: shown in Fig. 1, this two-dimensional digital speckle measurement instrument that the present embodiment provides, comprise horizontally disposed optical table 1, this is furnished with above optical table: for the testing jig 2 of fixing examined object a and for taking the ccd video camera 3 of described examined object.On described testing jig 2, be provided with for the charger to described examined object load application, described ccd video camera 3 is electrically connected to computing machine 4.This two-dimensional digital speckle measurement of the present embodiment instrument also comprises to the LED cold light source 5 of examined object irradiation light fixing on described testing jig 2 and to the charger of examined object load application fixing on described testing jig 2.In this example, described LED cold light source 5 has two, and the power of each LED cold light source 5 is 150W.
In the present embodiment, described testing jig 2 is detachably fixed on described optical table 1 by screw, and described ccd video camera 3 is detachably fixed on (surface of optical table 1 offers evenly densely covered threaded hole) on described optical table 1 by screw.So, just can regulate very easily testing jig 2 and the position of ccd video camera 3 on optical table, to adjust the distance between examined object and ccd video camera 3 camera lenses on testing jig 2.
In the present embodiment, described ccd video camera 3 adopts the digital camera that resolution is 1280 * 1024.Described ccd video camera 3 adopts telecentric lens.Effective measurement area of described ccd video camera 3 is 50 * 70mm2～250 * 350mm2, and effectively measuring distance is 0.5m～2.5m.
In conjunction with shown in Fig. 1, existing that the using method brief introduction of this two-dimensional digital speckle measurement of the present embodiment instrument is as follows again:
(1) determine after the camera lens and the distance between examined object a of ccd video camera 3, fix testing jig 2 and the position of ccd video camera 3 on optical table 1;
(2) open LED cold light source 5, regulate the focal length of ccd video camera, make the clear image that demonstrates examined object on the display screen of computing machine 4;
(3) open computer software, gather respectively the two width images that examined object a loads front and back;
(4), by software analysis two width images, can reflect intuitively in the displacement variable that loads each point on the examined object a of front and back, as Fig. 2.
More cognitive in order to allow people have the using method of this two-dimensional digital speckle measurement instrument, again the introduction of its using method is supplemented as follows: before examined object is measured, first on examined object, spray white background stain or black matrix white point, by ccd video camera and computer software, record these irregular pilots (being aforesaid stain or white point), after examined object loads, the position of pilot will change accordingly, by pilot in two width figure before and after relatively in the variation of directions X Y-direction, infer the change in displacement that examined object, as Fig. 2, and can in computer software, by the comparison body of different colours, reveal the variation of examined object diverse location.
Certainly, above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow people can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalent transformations of doing according to the Spirit Essence of the utility model main technical schemes or modification, within all should being encompassed in protection domain of the present utility model.
Claims (7)
1. a two-dimensional digital speckle measurement instrument, it is characterized in that: it comprises horizontally disposed optical table (1), this is furnished with above optical table: for the testing jig (2) of fixing examined object (a) and for taking the ccd video camera (3) of described examined object, described ccd video camera (3) is electrically connected to computing machine (4), also comprises to described testing jig (2) and goes up the LED cold light source (5) of fixing examined object irradiation light and charger from fixing examined object load application to described testing jig (2) that go up.
2. two-dimensional digital speckle measurement instrument according to claim 1, is characterized in that: described LED cold light source (5) has two.
3. two-dimensional digital speckle measurement instrument according to claim 1, is characterized in that: the power of described LED cold light source (5) is 150W.
4. two-dimensional digital speckle measurement instrument according to claim 1, it is characterized in that: it is upper that described testing jig (2) is detachably fixed on described optical table (1) by screw, and described ccd video camera (3) is detachably fixed on described optical table (1) by screw.
5. two-dimensional digital speckle measurement instrument according to claim 1, is characterized in that: described ccd video camera (3) adopts the digital camera that resolution is 1280 * 1024.
6. two-dimensional digital speckle measurement instrument according to claim 1, is characterized in that: described ccd video camera (3) adopts telecentric lens.
7. two-dimensional digital speckle measurement instrument according to claim 1, is characterized in that: effective measurement area of described ccd video camera (3) is 50 * 70mm
2～250 * 350mm
2, effectively measuring distance is 0.5m～2.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320670086.XU CN203534539U (en) | 2013-10-28 | 2013-10-28 | Two-dimension digital speckle measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320670086.XU CN203534539U (en) | 2013-10-28 | 2013-10-28 | Two-dimension digital speckle measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203534539U true CN203534539U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320670086.XU Expired - Fee Related CN203534539U (en) | 2013-10-28 | 2013-10-28 | Two-dimension digital speckle measuring instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163982A (en) * | 2018-09-06 | 2019-01-08 | 北京航星机器制造有限公司 | A kind of thermal environment bilateral loading equipment and test method |
-
2013
- 2013-10-28 CN CN201320670086.XU patent/CN203534539U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163982A (en) * | 2018-09-06 | 2019-01-08 | 北京航星机器制造有限公司 | A kind of thermal environment bilateral loading equipment and test method |
| CN109163982B (en) * | 2018-09-06 | 2021-06-01 | 北京航星机器制造有限公司 | Thermal environment bidirectional loading test equipment and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20191028 |
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| CF01 | Termination of patent right due to non-payment of annual fee |