CN202177370U - Double-microscopic strain measuring device of digital speckle - Google Patents
Double-microscopic strain measuring device of digital speckle Download PDFInfo
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- CN202177370U CN202177370U CN2010206706152U CN201020670615U CN202177370U CN 202177370 U CN202177370 U CN 202177370U CN 2010206706152 U CN2010206706152 U CN 2010206706152U CN 201020670615 U CN201020670615 U CN 201020670615U CN 202177370 U CN202177370 U CN 202177370U
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- 230000008901 benefit Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
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- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
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Abstract
The utility model relates to a double-microscopic strain measuring device of digital speckle, which is composed of a double CCDs (charge coupled device) image collection system and a computer data processing system. The device is characterized in that the double CCDs image collection system is formed by two CCDs (1) as one group, a dovetail groove (2), focusing hand wheels (3), a lens barrel (4), a microscopic camera lens (5) and an installation fixing platform (6). The dovetail groove (2) is fixed on the installation platform (6), and the focusing hand wheels (3) are arranged at the left end and the right end of the dovetail groove (2). The microscopic camera lens (5) is installed at the front end of the lens barrel (4), the CCDs (1) are installed at the tail end of the lens barrel (4), then the lens barrel (4) is placed on the dovetail groove (2) to form the image collection system. A computer processing system (7) is composed of a multi-channel image collection card, digital speckle processing software and a computer. The double-microscopic strain measuring device of the digital speckle is short in detection period, less in resource consumption, low in detection cost, considerable in economical benefit, convenient to implement and widely applied. Simultaneously, the method can be used in detection and emulation of safety performance of large building such as houses and dams.
Description
Technical field
The utility model relates to a kind of displacement, strain of structure, and the measurement mechanism of relevant mechanical quantity such as stress is especially used the measurement of non-contact optoelectronic detection means implementation structure microstrain.
Background technology
In the numerous network of highwayss of China, exist and thousands ofly big and small need carry out safety detection at the labour bridge.All there are every year a large amount of newly-built bridges to check and accept simultaneously through quality safety.At present, though X ray, CT, ultrasonic listening have been arranged and in structure, bury detection means such as optical fiber underground stress, the strain of bridge key position detected.Yet, because test volume is big, the testing cost height, the structural strain amount is less, and many technology are difficult to realize at engineering site, to such an extent as to still a large amount of at present subsides foil gauge one quasi-tradition electrical measurement detection means that adopts is tested the load-bearing capacity of bridge.Because this method need arrange on large bridge that hundreds of test point safeguards debug measurement; Thereby make sense cycle long; Testing cost is high, needs waste a large amount of financial resources, human and material resources, for launching especially in the safety detection of labour bridge.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of double microscopic digital speckle strain measurement device is provided, and its sense cycle is short, and the resource cost amount is few; Testing cost is low, and economic benefit is considerable; It is convenient to implement, and is convenient to widespread use.
A kind of double microscopic digital speckle strain measurement device of the utility model is made up of two CCD (being the abb. of English Charge Coupled Device) image capturing system, computer data processing system, it is characterized in that: said pair of ccd image acquisition system is one group CCD (1), dovetail groove (2), focusing handwheel (3), lens barrel (4), microlens (5) by two and installs and fixes platform (6) formation; Dovetail groove (2) is fixed on the mounting platform (6), and focusing handwheel (3) is positioned at the right ends of dovetail groove (2); Lens barrel (4) front end installation microscope head (5), CCD (1) is installed in the rear end, and being placed on then on the dovetail groove (2) is the composing images acquisition system; Said computer processing system (7) is made up of multichannel image capture card, digital speckle process software, computing machine.
The principle of work of the utility model is: by two is that the two ccd image acquisition systems and the computer data processing system of one group band microlens constitutes whole strain gauge means.Make speckle field on the measured object surface during measurement; Two ccd image acquisition systems are fixed in treat on the geodesic structure; Carried out computing by the computing machine synchronous acquisition by different 2 forward and backward speckle image input digit speckle relevant treatment softwares of stand under load in the geodesic structure gauge length, obtain by relevant mechanical quantities such as the displacement of geodesic structure, strain, stress.The utility model also can be adjusted focal length through the focusing handwheel on two ccd image acquisition systems easily, on CCD, obtains the optimized image of measured point; The length of gauge length can be regulated through the spacing of two CCD; When building structure was measured, the stationary platform of CCD must be formed an entity with structure to be measured, can eliminate the influence of vibrations to measuring accuracy.
Compare with prior art, the utility model has following advantage or good effect:
1. measuring accuracy and sensitivity are higher.Because this device has adopted two CCD and microlens, when measuring the deformational displacement amount, its precision can reach the micron number magnitude; When measuring small strain, can reach the measurement of several to dozens of microstrains, overcome the limitation that to use the strain electrical measuring method bridge structure to be implemented strain measurement.
2. sense cycle is short, and the resource cost amount is few.This device only needs to set up two ccd image acquisition systems at the key position that detects bridge and before and after the bridge stand under load, gathers corresponding speckle image and can realize detecting, so sense cycle is short, only needs a few days can accomplish the detection task.And traditional electrical measurement rule needs when bridge just begins to set up, will to carry out that the subsides of foil gauge are put and the layout of circuit, finish up to bridge erection, so its sense cycle often need spend some months even longer time, and consumption manpower is bigger.
3. testing cost is low, and economic benefit is considerable.The tradition electrical measuring method probably about 50～600,000, then needs up to a million for testing cost large-scale, super-huge bridge for the testing cost of a medium-sized bridge.The present invention only needs about 100,000 yuan for the testing cost of a medium-sized bridge is general, and can not surpass 500,000 for large-scale, super-huge its testing cost of bridge.Therefore, economic benefit and the social benefit brought of this method is inestimable.
4. it is convenient to implement, and is convenient to widespread use.This device can not only detect newly-built bridge, can also be widely used in the safety detection at the labour bridge, and this is the out of reach places of present traditional detection means.
In sum; The device that the utility model adopted has overcome effectively that the sense cycle that electrical measuring method that present bridge adopts in detecting brings is long, the capital amount is big; And for the influence of unfavorable factors such as carrying out of having no way of in the detection of labour bridge, also having overcome some comparatively advanced detection meanss that occurred in recent years simultaneously can not be able to this difficult situation of widespread use in bridge detects.The utility model is that bridge construction safety detection department provides a kind of efficient detection method, is detecting department for newly-built and in the safety detection efficient of labour bridge for improving bridge when bridge detection department saves a large amount of financial resources, man power and material greatly.
Description of drawings
Fig. 1 is that two of the utility model are two ccd image acquisition system synoptic diagram of one group;
Fig. 2 is a large bridge building structure field measurement device arrangenent diagram;
Each label is represented successively among the figure: CCD (1), dovetail groove (2), focusing hand are discussed (3), lens barrel (4), microlens (5), are installed and fixed platform (6) assembly, computer processing system (7).
Embodiment
Below through embodiment and combine accompanying drawing that the utility model is described further.
Like Fig. 1, shown in 2, the utility model is made up of two ccd image acquisition systems, computer data processing system.1 is CCD among the figure, and 2 is dovetail groove, and 3 is focusing handwheel, and 4 is lens barrel, and 5 is microlens, and 6 is mounting platform, and 7 is computer processing system, and 8 is fixed bar, and 9 is to be measured.
Two ccd image acquisition systems are that one group contain CCD, lens barrel, microlens, dovetail groove, focusing hand touches upon and install and fix the pick-up unit that platform component forms and constitute by 2 two; Dovetail groove is fixed on the mounting platform, and focusing handwheel is positioned at the right ends of dovetail groove; Lens barrel front end installation microscope head, CCD is installed in the rear end, and being placed on then on the dovetail groove is the composing images acquisition system; Computer processing system is made up of multichannel image capture card, digital speckle process software, computing machine.
The microstrain of large bridge structure is reached the measurement of relevant mechanical quantity with the device of the foregoing description 1.Shown in accompanying drawing 2, using fixed bar 8 is that two ccd image acquisition systems of one group are with being fixed on to be measured 9 with two.To be measured the 9 pitch-dark system hickie of brush constitutes correlated performance speckle field preferably; Regulate focusing handwheel 4; Make the tested point image reach optimum efficiency; The speckle image input digit speckle relevant treatment software forward and backward by stand under load in the computer data processing system synchronous acquisition measured object point-to-point transmission gauge length carries out computing, just can obtain the relevant mechanical quantity of measured object.
Claims (1)
1. double microscopic digital speckle strain measurement device; Form by two ccd image acquisition systems, computer data processing system; Computer processing system (7) is made up of multichannel image capture card, computing machine, it is characterized in that: said pair of ccd image acquisition system is one group CCD (1), dovetail groove (2), focusing handwheel (3), lens barrel (4), microlens (5) by two and installs and fixes platform (6) formation; Dovetail groove (2) is fixed on the mounting platform (6), and focusing handwheel (3) is positioned at the right ends of dovetail groove (2); Lens barrel (4) front end installation microscope head (5), CCD (1) is installed in the rear end, and being placed on then on the dovetail groove (2) is the composing images acquisition system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206706152U CN202177370U (en) | 2010-12-20 | 2010-12-20 | Double-microscopic strain measuring device of digital speckle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206706152U CN202177370U (en) | 2010-12-20 | 2010-12-20 | Double-microscopic strain measuring device of digital speckle |
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| CN202177370U true CN202177370U (en) | 2012-03-28 |
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| CN2010206706152U Expired - Fee Related CN202177370U (en) | 2010-12-20 | 2010-12-20 | Double-microscopic strain measuring device of digital speckle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743621A (en) * | 2014-01-03 | 2014-04-23 | 东南大学 | Ectopic digital volume correlation method based on image registration |
| CN104634266A (en) * | 2013-11-08 | 2015-05-20 | 南京化工职业技术学院 | Mechanical sealing end surface deformation measurement system based on binocular vision DIC and measurement method thereof |
| CN106595528A (en) * | 2016-11-10 | 2017-04-26 | 华中科技大学 | Digital speckle-based telecentric microscopic binocular stereoscopic vision measurement method |
-
2010
- 2010-12-20 CN CN2010206706152U patent/CN202177370U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634266A (en) * | 2013-11-08 | 2015-05-20 | 南京化工职业技术学院 | Mechanical sealing end surface deformation measurement system based on binocular vision DIC and measurement method thereof |
| CN103743621A (en) * | 2014-01-03 | 2014-04-23 | 东南大学 | Ectopic digital volume correlation method based on image registration |
| CN106595528A (en) * | 2016-11-10 | 2017-04-26 | 华中科技大学 | Digital speckle-based telecentric microscopic binocular stereoscopic vision measurement method |
| CN106595528B (en) * | 2016-11-10 | 2019-03-05 | 华中科技大学 | A kind of micro- binocular stereo vision measurement method of telecentricity based on digital speckle |
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| Date | Code | Title | Description |
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| 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: 20120328 Termination date: 20141220 |
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| EXPY | Termination of patent right or utility model |