CN109751955A - Non-contact object displacement measuring device and the measurement method for using it - Google Patents
Non-contact object displacement measuring device and the measurement method for using it Download PDFInfo
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- CN109751955A CN109751955A CN201711054716.XA CN201711054716A CN109751955A CN 109751955 A CN109751955 A CN 109751955A CN 201711054716 A CN201711054716 A CN 201711054716A CN 109751955 A CN109751955 A CN 109751955A
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Abstract
The present invention provides a kind of non-contact object displacement measuring device and use its measurement method, the non-contact object displacement measuring device includes: standard gauge block, standard gauge block is used to provide the full-length under hot environment, and hot environment is the temperature environment that temperature value is greater than or equal to 500 DEG C；Optical system and camera, optical system is used to for target object and standard gauge block being imaged on the detector of camera, and camera is used to acquire the image of target object and standard gauge block and exports the image of collected target object and standard gauge block to image procossing and control unit；The image of full-length and target object that image procossing and control unit, image procossing and control unit are used to be provided according to standard gauge block, which calculates, obtains target object deformational displacement amount in a high temperauture environment.It applies the technical scheme of the present invention, to solve to demarcate complicated technical problem when carrying out high temp objects displacement measurement in the prior art.
Description
Technical field
The present invention relates to displacement measurement technology field more particularly to a kind of non-contact object displacement measuring device and uses
Its measurement method.
Background technique
With the development of heat enginnering technology, more and more high-temperature services are applied in field of industrial production,
Middle thermal power machinery is almost indispensable part in heat enginnering, and the stability of thermal power machinery during the motion is it
The key parameter in service life needs to monitor thermal power machinery equipment on-line during developing with test, at high operating temperatures,
The moving displacement amount of high-temperature component is difficult directly to carry out contact measurement with dimensional measuring instrument, it is therefore desirable to use non-contacting side
Formula carries out displacement measurement.
In non-contact measurement method, the method based on image has been realized in the measurement of high temp objects displacement, but existing side
The calibration process of method be it is fixed, when testee occur acoplanarity displacement after, it is necessary to re-scale, and need to avoid high-temperature region
It is demarcated, operating process is cumbersome.
Summary of the invention
The present invention provides a kind of non-contact object displacement measuring device and using its measurement method, it is able to solve existing
Have and demarcates complicated technical problem in technology when carrying out high temp objects displacement measurement.
According to an aspect of the present invention, a kind of non-contact object displacement measuring device is provided, the non-contact object position
Measuring system includes: standard gauge block, and standard gauge block is used to provide the full-length under hot environment, and hot environment is temperature value
Temperature environment more than or equal to 500 DEG C；Optical system and camera, optical system are used to for target object and standard gauge block being imaged
On the detector of camera, camera is used to acquire the image of target object and standard gauge block and by collected target object and mark
The image of quasi- gauge block is exported to image procossing and control unit；Image procossing and control unit, image procossing and control unit are used
It is calculated in the image of the full-length and target object provided according to standard gauge block and obtains target object shape in a high temperauture environment
Variable displacement amount.
Further, standard gauge block is mutually fixed by stationary fixture with target object, and the tested plane of target object is in height
It is in same plane always with the end face of standard gauge block under warm environment.
Further, the material of standard gauge block includes zirconium oxide or invar.
Further, optical system includes at least one optical energy attenuation piece, at least one optical energy attenuation piece for reducing into
Enter the light energy of camera so that target object blur-free imaging is on the detector of camera.
Further, optical system further includes adjusting lens barrel, aperture and lens, optical energy attenuation piece, aperture and lens setting
It is adjusting in lens barrel.
According to another aspect of the present invention, a kind of displacement measurement using non-contact object displacement measuring device is provided
Method, non-contact object displacement measuring device are non-contact object displacement measuring device as described above.
Further, displacement measurement method includes: mutually to fix standard gauge block with target object, standard gauge block and object
The tested surface of body is in the same plane；Target object and standard gauge block are imaged on to the detector of camera by optical system
On；Camera acquisition target object and standard gauge block image and by the image of collected target object and standard gauge block export to
Image procossing and control unit；The figure of full-length and target object that image procossing and control unit are provided according to standard gauge block
As obtaining target object deformational displacement amount in a high temperauture environment.
Further, the image of image procossing and control unit are provided according to standard gauge block full-length and target object
Obtaining target object, deformational displacement measurer body includes: image procossing and control unit according to standard gauge block in a high temperauture environment
Image and full-length obtain the physical length of image and the ratio of number of pixels；Image procossing and control unit, which calculate, obtains table
Show the number of pixels, grey scale pixel value and related modulus of the deformational displacement amount of target object；According to the physical length and picture of image
Prime number purpose ratio and number of pixels, grey scale pixel value and related modulus are to obtain the deformational displacement amount of target object.
It applies the technical scheme of the present invention, can be realized under high ambient conditions by standard gauge block to acquisition image
Camera carry out real-time online calibration, solve the problems, such as high temp objects displacement non-cpntact measurement during can not real-time calibration, drop
Low calibration difficulty, improves the efficiency of non-cpntact measurement.After the completion of calibration, the number of image procossing and control unit to acquisition
Image carries out calculation processing, and exports the deformational displacement amount of target object in real time, and such mode simply, conveniently, greatlys improve
The measurement efficiency of ohject displacement.
Detailed description of the invention
Included attached drawing is used to provide to be further understood from the embodiment of the present invention, and which constitute one of specification
Point, for illustrating the embodiment of the present invention, and come together to illustrate the principle of the present invention with verbal description.It should be evident that below
Attached drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying creation
Property labour under the premise of, be also possible to obtain other drawings based on these drawings.
Fig. 1 shows simplifying for the non-contact object displacement measuring device provided according to a particular embodiment of the invention and ties
Structure schematic block diagram；
Fig. 2 shows the structural schematic diagrams of the optical system provided according to a particular embodiment of the invention；
The structure that Fig. 3 shows when the target object provided according to a particular embodiment of the invention is assembled with standard gauge block is shown
It is intended to.
Wherein, the above drawings include the following reference numerals:
10, standard gauge block；20, optical system；21, optical energy attenuation piece；22, lens barrel is adjusted；23, aperture；24, lens；30,
Camera；40, image procossing and control unit；50, target object；60, stationary fixture；70, pedestal.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is right below
The description only actually of at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or use
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, shall fall within the protection scope of the present invention.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each portion shown in attached drawing
The size divided not is to draw according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation
A part of book.In shown here and discussion all examples, any occurrence should be construed as merely illustratively, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar label
Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached
It does not need that it is further discussed in figure.
As shown in Figure 1, a kind of contactless ohject displacement measuring device is provided according to a particular embodiment of the invention,
The non-contact object displacement measuring device includes standard gauge block 10, optical system 20, camera 30 and image procossing and control unit
40, wherein standard gauge block 10 is used to provide the full-length under hot environment, and hot environment is that temperature value is greater than or equal to 500
DEG C temperature environment, optical system 20 is used to for target object and standard gauge block 10 to be imaged on the detector of camera 30, camera
30 for acquiring the image of target object 50 and standard gauge block 10 and by the figure of collected target object 50 and standard gauge block 10
As output to image procossing and control unit 40, the standard of image procossing and control unit 40 for being provided according to standard gauge block 10
The image of length and target object, which calculates, obtains target object deformational displacement amount in a high temperauture environment.
Using such configuration mode, image procossing and the automatic image for capturing standard gauge block 10 of control unit 40, due to mark
Quasi- gauge block 10 is capable of providing the full-length under hot environment, and swell increment can be ignored not standard gauge block in a high temperauture environment
Meter, therefore standard gauge block 10 is used as scale as length standard on the image, image procossing and control unit 40 use standard volume
The length of block 10 in the picture carrys out the image of calibration for cameras acquisition, and records the foundation saved using as calculating length in pixels, by
This is realized by standard gauge block 10 carries out real-time online calibration to the camera of acquisition image under high ambient conditions, solves height
During warm ohject displacement non-cpntact measurement can not real-time calibration the problem of, reduce calibration difficulty, improve non-cpntact measurement
Efficiency.After the completion of calibration, image procossing and the digital picture of 40 pairs of control unit acquisitions carry out calculation processing, and export in real time
The deformational displacement amount of target object 50, such mode simply, conveniently, greatly improve displacement measurement efficiency.
Further, in the present invention, as shown in figure 3, in order to guarantee target object displacement measurement accuracy, can be by standard
Gauge block 10 is fixed by stationary fixture 60 and 50 phase of target object, the tested plane of target object 50 under high temperature environment with standard
The end face of gauge block 10 is in same plane always.
As a specific embodiment of the invention, stationary fixture 60 is made of high-temperature material, one end of stationary fixture 60
Fixed standard gauge block 10, the other end are embedded in the pedestal 70 of target object 50, to guarantee the end face of tested plane and standard gauge block 10
In same plane, when acoplanarity displacement occurs for high-temperature targets object, standard gauge block 10 also occurs to be displaced accordingly, so that
End face of the tested plane of target object 50 under high temperature environment with standard gauge block 10 is in same plane always.
In the present invention, in order to guarantee that standard gauge block does not expand such that for providing high temperature substantially under high temperature environment
Full-length under environment can configure the material of standard gauge block 10 to include zirconium oxide or invar.High-temperature standard gauge block is one
The standard gauge block that class heat-resisting material is prepared into, the size of standard gauge block 10 follow national gauge block standard, gauge block material first choice oxygen
Change zirconium, next selects invar, it also can choose the material except this two, in the hot environment greater than 1600 DEG C, standard gauge block
The order of magnitude of thermal expansion coefficient of material guarantee 10-6Magnitude.
In addition, camera 30 of the invention is Visible Light Camera, the pixel resolution of camera is not less than 1024*768, the camera
30 have external control function, which is that a kind of camera is attached to function, show as hardware configuration and software-driven
Program matches.It is controlled by outside, the control of the parameters such as shooting time, time for exposure, the frame frequency of camera may be implemented.
Further, in the present invention, if the light energy into camera is excessively high, it will lead to camera acquired image
Contrast decline, secondly can be saturated partial region, so that camera acquired image can not distinguish.It, can if energy is excessively high
Camera detector is damaged, therefore, when carrying out the displacement measurement of target object, needs light energy being adjusted to camera permitted
In linear dynamic range.It, can be by optics in order to guarantee that clearly image is presented in measured target on the detector of camera based on this
System 20 includes at least one optical energy attenuation piece 21, at least one optical energy attenuation piece 21 is for reducing the light energy for entering camera 30
So that target object blur-free imaging is on the detector of camera 30.Wherein, as a specific embodiment of the invention, optical system
System 20 includes that multiple optical energy attenuation pieces 21 select corresponding optical energy attenuation when measured target object is in different temperatures range
Piece, to guarantee that clearly image is presented in measured target on the detector of camera.
As a specific embodiment of the invention, for example, when target object 50 is in 1000 DEG C to 2000 DEG C of temperature
When in range, the optical energy attenuation piece that decaying multiplying power is X% can be used, its exposure intensity is made to fall in the dynamic range of camera；Work as mesh
When marking within the temperature range of object 50 is in 2000 DEG C to 3000 DEG C, the optical energy attenuation piece that decaying multiplying power is Y% can be used, make it
Exposure intensity is fallen in the dynamic range of camera.The decaying multiplying power of optical energy attenuation piece 21 is different according to camera parameter and changes,
In, the dynamic range of camera 30 be it is adjustable, the intensity of light source be it is changeable, the aperture 23 of optical system 20 is adjustable, camera
30 time for exposure be also it is adjustable, carry out optical energy attenuation piece 21 selection when, as long as can guarantee the quilt of target object 50
Clearly image can be presented in survey face on camera detector.
In the present invention, as shown in Fig. 2, optical system 20 further includes adjusting lens barrel 22, aperture 23 and lens 24, luminous energy declines
Subtract piece 21, aperture 23 and the setting of lens 24 adjusting in lens barrel 22.Wherein, lens 24 can be adjusted apart from camera by adjusting lens barrel 22
The distance of detector, so as to adjust the amplification factor of optical system 20.It is provided with aperture on adjusting lens barrel 22 and adjusts machine
Structure can change aperture by aperture regulating mechanism and open size, to control into the amount light in camera 30.Wherein, light
System 20 and the spatial resolution of camera 30 match, and the diameter for the first-order diffraction spot that optical system diffraction generates is less than camera
The physical size of detector single pixel.
As a specific embodiment of the invention, it is single as image procossing and control that computer and application software can be used
Member 40.The application software is dedicated data processing software, and it comprises dynamic calibration functions, when measured target object moves
When dynamic, software re-scales automatically, after the completion of calibration, can carry out calculation processing to the digital picture of acquisition immediately, and real
When export object displacement result.
When carrying out the displacement measurement of target object using the device of the invention, target object 50 and standard gauge block 10 are simultaneously
Into the visual field of camera 30, optical system 20 configures corresponding optical energy attenuation piece 21, appropriate can be lowered into camera 30
The enlargement ratio of light energy, optical system 20 is adjustable, can be incited somebody to action by the enlargement ratio and aperture 23 that adjust optical system 20
Different temperatures target blur-free imaging is on camera detector, and camera 30 is for acquiring and exporting high-temperature targets object and high temperature scale
Digital picture formed by quasi- gauge block, camera 30 are electrically connected with computer and application software, and computer and application software are for controlling
Camera 30 completes digital image acquisition and handles digital picture, and shows the result of calculating.
According to another aspect of the present invention, a kind of displacement measurement using non-contact object displacement measuring device is provided
Method, the non-contact object displacement measuring device are non-contact object displacement measuring device as described above.Of the invention
Displacement measurement method includes: to fix standard gauge block 10 and 50 phase of target object, the tested surface of standard gauge block 10 and target object
It is in the same plane；By optical system 20 target object and standard gauge block 10 to be imaged on the detector of camera 30；
The image of the acquisition target object of camera 30 and standard gauge block 10 is simultaneously defeated by the image of collected target object and standard gauge block 10
Out to image procossing and control unit 40；The full-length and mesh that image procossing and control unit 40 are provided according to standard gauge block 10
The image for marking object obtains target object deformational displacement amount in a high temperauture environment.
Using displacement measurement method of the invention, the real-time mark of image in hot environment is realized by high-temperature standard gauge block 10
It is fixed, solve the problems, such as that traditional scaling board is not available in the high temperature environment, so that non-cpntact measurement high-temperature targets object is
The measurement efficiency of system can be promoted significantly.
Further, in the present invention, the full-length that image procossing and control unit 40 are provided according to standard gauge block 10
Obtaining target object with the image of target object, deformational displacement measurer body includes: that image procossing and control are single in a high temperauture environment
Member 40 obtains the number of pixels of image and the ratio of physical length according to the image and full-length of standard gauge block 10；Image procossing
Number of pixels, grey scale pixel value and the related modulus for obtaining the deformational displacement amount for indicating target object are calculated to control unit 40；
According to the number of pixels of image to the ratio of physical length and number of pixels, grey scale pixel value and related modulus to obtain target
The deformational displacement amount of object.
Further understand to have to the present invention, below with reference to Fig. 1 to Fig. 3 to using non-contact object of the invention
The method of displacement measuring device is described in detail.
As a specific embodiment of the invention, it is single as image procossing and control that computer and application software can be used
Member 40.In measurement process, after acoplanarity displacement occurs for target object, fuzzy image can be shown in application software, is applied
Software automatic prompt system adjusting parameter, by manually or automatically adjust optical system 20 so that object plane be moved forward and backward,
Until clearly image can be presented on camera detector.
At this point, camera 30 acquires the image of target object 50 and standard gauge block 10 and by collected target object 50 and mark
The image of quasi- gauge block 10 is exported to computer and application software, and application software captures the image of high-temperature standard gauge block automatically, because of height
Swell increment can be ignored warm standard gauge block in a high temperauture environment, so high-temperature standard gauge block is as length standard in image
Upper to be used as scale, application software carrys out the image of calibration for cameras 30 using the length of standard gauge block 10 in the picture, and records preservation,
Re-scaled in this way, completion is automatic as the foundation for calculating length in pixels.For example, in camera image, standard gauge block 10
The number of pixels of image is 100, and the physical length of standard gauge block 10 is 10mm, then the ratio of image physical length and number of pixels
Example is exactly 1mm:10, which can be used as the foundation for calculating length in pixels.
When high-temperature targets object itself is expanded because of temperature change, regional area will occur to become accordingly
Shape shows on camera 30 to be exactly that irregular displacement can occur for 30 acquired images of camera.For target object difference
Subregion, expansion length might have larger difference, then actual deformation quantity embodied on camera image be
The transformation of its range for covering pixel.Wherein, number of pixels can directly measure acquisition, and grey scale pixel value can be straight by camera
It obtains and takes, related modulus is available by calculating.When carrying out the calculating of deformational displacement amount, two images are chosen first,
A region is respectively taken in the two images respectively, a region A is taken on the first sub-picture, in the second area sub-picture Shang Quyige
The shape of domain B, a-quadrant and B area, size and number of pixels are all the same, but a-quadrant and gray value in B area are different,
The related modulus of A to two regions B are calculated by the number of pixels and grey scale pixel value in two regions, and so on, it obtains
A series of related modulus is taken, and according to the ratio of the physical length of a series of related modulus combination present image and number of pixels
Value calculates the deformational displacement amount for obtaining target object.
Wherein, for moving in parallel the deformational displacement amount that can directly calculate object by linear ratio relation.Work as object
Whole in-plane displacement occurs can equally count then application software can capture offset pixels number of the global feature in visual field
Calculate the offset of object.Thus the measurement of ohject displacement amount is completed.
In conclusion non-contact object displacement measurement method of the invention is in terms of existing technologies, by using
Standard gauge block, which can be realized, carries out real-time online calibration to the camera of acquisition image under high ambient conditions, solves high temperature substrate
Position move non-cpntact measurement during can not real-time calibration the problem of, reduce calibration difficulty, improve the effect of non-cpntact measurement
Rate.After the completion of calibration, image procossing and control unit carry out calculation processing to the digital picture of acquisition, and export object in real time
The deformational displacement amount of body, such mode simply, conveniently, greatly improve the displacement measurement efficiency of target object.
In the description of the present invention, it is to be understood that, the noun of locality such as " front, rear, top, and bottom, left and right ", " it is laterally, vertical,
Vertically, orientation or positional relationship indicated by level " and " top, bottom " etc. is normally based on orientation or position shown in the drawings and closes
System, is merely for convenience of description of the present invention and simplification of the description, in the absence of explanation to the contrary, these nouns of locality do not indicate that
It must have a particular orientation or be constructed and operated in a specific orientation with the device or element for implying signified, therefore cannot manage
Solution is limiting the scope of the invention；The noun of locality " inside and outside " refers to inside and outside the profile relative to each component itself.
For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
In addition, it should be noted that, limiting components using the words such as " first ", " second ", it is only for be convenient for
Corresponding components are distinguished, do not have Stated otherwise such as, there is no particular meanings for above-mentioned word, therefore should not be understood as to this
The limitation of invention protection scope.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of non-contact object displacement measuring device, which is characterized in that the non-contact object displacement measuring device includes:
Standard gauge block (10), the standard gauge block (10) are used to provide the full-length under hot environment, and the hot environment is
Temperature value is greater than or equal to 500 DEG C of temperature environment；
Optical system (20) and camera (30), the optical system (20) be used for by target object and the standard gauge block (10) at
As on the detector of camera (30), the camera (30) is used to acquire the figure of the target object and the standard gauge block (10)
Picture simultaneously exports the image of the collected target object and the standard gauge block (10) to image procossing and control unit
(40)；
Image procossing and control unit (40), described image processing are used for control unit (40) according to the standard gauge block (10)
The image of the full-length of offer and the target object calculates the deformation for obtaining the target object under the hot environment
Displacement.
2. non-contact object displacement measuring device according to claim 1, which is characterized in that the standard gauge block (10)
Mutually fixed by stationary fixture and the target object, the tested plane of the target object under the hot environment with it is described
The end face of standard gauge block (10) is in same plane always.
3. non-contact object displacement measuring device according to claim 1, which is characterized in that the standard gauge block (10)
Material include zirconium oxide or invar.
4. non-contact object displacement measuring device according to claim 1, which is characterized in that the optical system (20)
Including at least one optical energy attenuation piece (21), at least one described optical energy attenuation piece (21) is for reducing the entrance camera (30)
Light energy so that the target object blur-free imaging on the detector of the camera (30).
5. non-contact object displacement measuring device according to claim 4, which is characterized in that the optical system (20)
It further include adjusting lens barrel (22), aperture (23) and lens (24), the optical energy attenuation piece (21), the aperture (23) and described
Mirror (24) setting is in the adjusting lens barrel (22).
6. a kind of displacement measurement method using non-contact object displacement measuring device, which is characterized in that described contactless
Ohject displacement measuring device is non-contact object displacement measuring device described in any one of claims 1 to 5.
7. displacement measurement method according to claim 6, which is characterized in that the displacement measurement method includes:
Standard gauge block (10) is mutually fixed with target object, the standard gauge block (10) and the tested surface of the target object are located at
In same plane；
The target object and the standard gauge block (10) are imaged on to the detector of camera (30) by optical system (20)
On；
The camera (30) acquires the image of the target object and the standard gauge block (10) and by the collected target
The image of object and the standard gauge block (10) is exported to image procossing and control unit (40)；
The full-length and the object that described image processing is provided with control unit (40) according to the standard gauge block (10)
The image of body obtains deformational displacement amount of the target object under the hot environment.
8. displacement measurement method according to claim 7, which is characterized in that described image processing and control unit (40) root
The image of the full-length and the target object that provide according to the standard gauge block (10) obtains the target object in the height
Deformational displacement measurer body under warm environment includes:
Described image processing obtains image according to the image and full-length of the standard gauge block (10) with control unit (40)
The ratio of physical length and number of pixels；
The number of pixels of the deformational displacement amount of described image processing and control unit (40) calculating acquisition expression target object,
Grey scale pixel value and related modulus；
According to the physical length of image to the ratio of number of pixels and number of pixels, grey scale pixel value and related modulus to obtain
The deformational displacement amount of the target object.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229330A (en) * | 2019-07-15 | 2021-01-15 | 北京振兴计量测试研究所 | Displacement field measuring system in high-temperature environment |
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| CN102706458A (en) * | 2012-05-29 | 2012-10-03 | 顺德中山大学太阳能研究院 | Infrared thermal imaging coordinate positioning method |
| CN102840829A (en) * | 2012-09-03 | 2012-12-26 | 北京科技大学 | Manual mark-basedsystem and manual mark-based method for measuring displacement field inside high temperature object area |
| CN103383360A (en) * | 2013-07-29 | 2013-11-06 | 重庆理工大学 | Thin strip continuous casting billet surface defect sinusoidal grating phase shifting detection device and method |
| CN104266900A (en) * | 2014-10-13 | 2015-01-07 | 清华大学 | CTOD (crack-tip opening displacement) measurement method based on high-temperature image processing |
| CN105928467A (en) * | 2016-06-01 | 2016-09-07 | 北京卫星环境工程研究所 | Test system for deformation measurement of large spacecraft structure under vacuum and low-temperature environment |
| CN106152978A (en) * | 2016-06-20 | 2016-11-23 | 陕西师范大学 | A kind of untouchable area measurement method based on graphical analysis |
| CN107883855A (en) * | 2017-10-20 | 2018-04-06 | 西安空间无线电技术研究所 | It is a kind of based on photogrammetric high and low temperature environment Light deformation method of testing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112229330A (en) * | 2019-07-15 | 2021-01-15 | 北京振兴计量测试研究所 | Displacement field measuring system in high-temperature environment |
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