CN101556143A - Three-dimensional measurement and detection device and method - Google Patents
Three-dimensional measurement and detection device and method Download PDFInfo
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- CN101556143A CN101556143A CNA2008100845854A CN200810084585A CN101556143A CN 101556143 A CN101556143 A CN 101556143A CN A2008100845854 A CNA2008100845854 A CN A2008100845854A CN 200810084585 A CN200810084585 A CN 200810084585A CN 101556143 A CN101556143 A CN 101556143A
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Abstract
The invention relates to a detection device and a detection method. The detection device comprises a light source, an optical grating, a movable transparent plate, a fibre optic image transmission bundle, an imaging device and a processing unit, wherein the light source can generate light rays, optical grating patterns can be generated in such a way that the light rays pass through the optical grating, the movable transparent plate transforms the optical grating patterns into a plurality of phase shifting strip patterns, the fibre optic image transmission bundle can project the phase shifting strip patterns to the surface of an object to generate projected strip patterns, the imaging device is used for obtaining images of the projected strip patterns, and the processing unit can reestablish the surface of the object by utilizing the obtained images.
Description
Technical field
The present invention relates to a kind of sniffer and method, relate in particular to a kind of borescope or endoscope and method that object dimensional surface profile and measurement can be provided.
Background technology
Borescope and endoscope are widely used in the inside of detecting the object cavity that is difficult to enter.Most of borescopes or endoscope (calling sniffer in the following text) comprise fibre bundle, lens combination and image sensing apparatus.The light that external light source produces transmits by the fibre bundle in the sniffer and illuminates the object that is positioned at behind the sniffer.After object is illuminated, its just the scioptics system imaging on image sensing apparatus.Subsequently, image sensing apparatus just is transferred to a display device to the image of object, observes such as display.Image sensing apparatus can be arranged at the front end of sniffer, such as rigid borescope or endoscope; In addition, it also can be arranged at the rear end of sniffer, such as video borescope or endoscope.Sniffer can be used to detect some positions that are difficult for entering confirm the there parts abrasion condition and whether by correct manufacturing or assembling.Whether it also can be used to carry out dimensional measurement up to specification with manufacturing or assembling that whether the wearing and tearing of confirming parts have surpassed the restriction of operation or parts.In addition, it can also be used to setting up three-dimensional model or surface profile, carries out three dimensional viewing or reverse engineering etc.
The magnification of objects displayed image and apparent size constantly change along with the variation of the distance of object and sniffer on display device.This has just produced a problem, promptly is difficult to object is carried out dimensional measurement accurately, particularly carries out three-dimensional measurement.
At present, existing a lot of methods utilize sniffer to carry out three-dimensional measurement, obtain single image contour method as stereo vision method (Stereo Viewing), spot projection method or use single line.Stereo vision method can be used to produce 3-D view, but it can only provide the information that two points that are mutually related are arranged on the image, like this, and when body surface information will be run into trouble seldom the time.And, thereby the association process of carrying out is between points obtained a complete three-dimensional surface profile and need expend a large amount of time, a spot of point of normally only selecting to satisfy fundamental measurement carries out association process.The spot projection method can be measured the point of institute's projected position, and zone between points replenishes calculating with the interpolate value algorithm then, and like this, the case depth information in zone between points just can accurately not obtain.The single line consistency profiles can be used to provide the profile information of single line present position, but is positioned single line on the target object surface relatively more difficult exactly.And when body surface unevenness or view and body surface out of plumb, this non-colinear point that utilizes carries out such as by the measurement regular meeting of putting line or spreading over a whole area from one point error taking place.The normal single line profile that uses scans the 3-D view of setting up object in industrial system, but because the limiting it and also in the sniffer of reduced size, do not obtain actual application of size.
Also there is other problems in the above method.Such as, need very big calculated capacity to come deal with data and experienced technician to come operating means.In addition, when the high-precision complete object dimensional surface profile of needs or when carrying out perfect measurement, above method is also improper.Do not have complete data, some geometrical properties on the body surface just may not obtain.
In order to address this problem, the striped phase-shift method is used to obtain complete object data.Yet the striped phase-shift method does not also have the actual sniffer that is applied at present, in borescope or endoscope.
So, a kind of sniffer that object dimensional surface profile and measurement can be provided based on the striped phase-shift method need be provided.
Summary of the invention
One embodiment of the present of invention provide a kind of sniffer.This sniffer comprises light source, grating, movable transparent panel, optical fiber image transmission beam, imaging device and processing unit.Light source can produce light.Light passes grating can produce grating pattern.Movable transparent panel can change described grating pattern into a plurality of phase shift candy strips.Optical fiber image transmission beam can be on phase shift stripe pattern projection to a body surface and obtain candy strip after the projection.Imaging device is used for obtaining the image of the candy strip after the projection.Processing unit can utilize the image of described acquisition to come body surface is rebuild.
An alternative embodiment of the invention provides a kind of phase shift striped generation device.This phase shift striped generation device comprises light source, grating, movable glass plate and optical fiber image transmission beam.Light source can produce light.Light passes grating can produce grating pattern.Movable glass plate can change described grating pattern into a plurality of phase shift candy strips.Optical fiber image transmission beam can be on phase shift stripe pattern projection to a body surface.
Embodiments of the invention also provide a kind of method of using sniffer.This method comprises makes the light that comes from light source pass grating and form grating pattern; Make described grating pattern pass movable glass plate and form a plurality of phase shift candy strips; Make described phase shift candy strip pass optical fiber image transmission beam to project on the body surface; Obtain stripe pattern after the projection from body surface; And utilize the described stripe pattern that obtains to rebuild described body surface.
Embodiments of the invention further provide a kind of method of using phase shift striped generation device.This method comprises makes the light that comes from light source pass grating and form grating pattern; Make described grating pattern pass movable glass plate and form a plurality of phase shift candy strips; And make described phase shift candy strip pass optical fiber image transmission beam to project on the body surface.
Description of drawings
Be described for embodiments of the invention in conjunction with the drawings, the present invention may be better understood, in the accompanying drawings:
Fig. 1 is the synoptic diagram of an embodiment of borescope of the present invention or endoscopic system;
Fig. 2 is the synoptic diagram of an embodiment of phase shift striped generation device in borescope of the present invention shown in Figure 1 or the endoscopic system;
Fig. 3 produces the synoptic diagram of an embodiment of phase shift candy strip for solenoid-activated glass plate in borescope of the present invention or the endoscopic system;
Fig. 4 is the synoptic diagram of the rotation of glass plate with the generation phase shift;
Fig. 5 is the synoptic diagram of another embodiment of phase shift striped generation device in borescope of the present invention or the endoscopic system.
Embodiment
As shown in Figure 1, in one embodiment of the invention, sniffer (borescope or endoscopic system) 10 comprises treating apparatus 11, supervising device 12, control device 13, image received device 14 and phase shift striped generation device 15.Treating apparatus 11 can be central processing unit (CPU).Supervising device 12 can be LCD (Liquid Crystal Display, LCD).Control device 13 includes Circuits System and/or mechanical system.Image received device 14 includes imaging device 140 and imaging optical device 141.Imaging device 140 can be charge-coupled device (CCD), and (Charge-coupled Device CCD), also can be other devices with two-dimentional photosensitive pixel array.This device can be converted into vision signal to the light signal of each pixel induction and export.Imaging optical device 141 can be lens.Phase shift striped generation device 15 comprises light source 150, phase shift optical devices 151, optical fiber image transmission beam 152 and projecting optical device 153, its jointly phase shift stripe pattern projection to body surface 16.
But treating apparatus 11 driving control devices 13 are controlled phase shift optical devices 151 to produce the phase shift candy strip of expectation.Certainly, control device 13 can not link to each other with treating apparatus yet and independently controls phase shift optical devices 151.After phase shift stripe pattern projection was to the body surface 16, imaging optical device 141 can be guided the candy strip after the projection and be focused on it to imaging device 140.Then, the image of the candy strip after 140 projections that obtain of imaging device is transferred to treating apparatus 11 so that body surface 16 is calculated.Simultaneously, treating apparatus 11 can drive supervising device 12 with the image that shows body surface 16 so that the user observes.In one embodiment, body surface 16 is hemispherical, and certainly, it also can be other Any shape.Treating apparatus 11 and supervising device 12 can be used as processing unit and come body surface 16 is rebuild.Except that crossing phase shift striped generation device 15, for a person skilled in the art, other elements shown in Fig. 1 all can be realized easily.
Fig. 2 is the synoptic diagram of an embodiment of phase shift striped generation device in borescope shown in Figure 1 or the endoscopic system.In this embodiment, phase shift striped generation device 15 comprises light source 150, a pair of condenser 21, grating 22, movable transparent panel 23, striped condensing optical device condensing 24, phase shift optical devices 151, optical fiber image transmission beam 152 and projecting optical device 153, and it all sets gradually along axis 29.In addition, body surface 16 also is provided with along axis 29.
In the embodiment shown in Figure 2, light source 150 can be a white light source, and it also can be other any light sources that is applicable to sniffer 10, as mercury vapor lamp, metal halide lamp, Halogen lamp LED, laser lamp, phosphorescent lamp, optical fiber laser instrument or LED lamp etc.Striped condensing optical device condensing 24 or projecting optical device 153 can be conventional lens, GRIN Lens (Gradient Index Lens, GRIN) or other any efficient, low distortion and the big lens of focusing range.
In addition, an also available condenser replaces a pair of condenser 21.Certainly, be preferably and use a pair of condenser, because it can calibrate light efficiently.Transparent panel 23 comprises a glass plate.In addition, light source 150 also can directly carry light not need to be provided with condenser to grating 22 again.The two ends of optical fiber image transmission beam 152 also can be distinguished directly relative with body surface 16 with glass plate 23.
As shown in Figure 2, be example with the light 27A that comes from light source 150.Light 27A passes condenser 21 and becomes phase caustic 27B; Then, phase caustic 27B passes grating 22 and produces the light beam 28 that includes grating pattern; Light beam 28 passes glass plate 23 successively and striped convergent lens 24 back front ends from optical fiber image transmission beam 152 enter and pass from its rear end.At last, thus light beam 28 pass projecting lens 153 the grating pattern of grating 22 or stripe pattern projection to body surface 16.In one embodiment, striped convergent lens 24 is arranged in and adjusts light beam 28 on the focusing surface of condenser 21 and enter optical fiber image transmission beam 152.Optical fiber image transmission beam 152 is relevant fibrous bundle (Coherent Fiber Bundle), and the optical fiber in it is identical at the arrangement position at its two ends, thereby the candy strip of the candy strip that enters from the one end and other end appearance can be consistent.Like this, the grating pattern that comprised of light beam 28 just keeps identical at the leading portion of optical fiber image transmission beam 152 with the rear end.
In the embodiment shown in Figure 2, control device 13 control glass plates 23 are rotated just and can change the grating pattern of grating 22 into different initial bit phases a plurality of phase shift candy strips along a straight line (not shown) that is parallel to grating 22 grooves.
Fig. 3 produces the synoptic diagram of an embodiment of phase shift candy strip for solenoid-activated glass plate in borescope or the endoscopic system.In this embodiment, glass plate 23 links to each other with an end of a connecting link 31, and the other end of connecting link 31 links to each other with solenoid 30.Solenoid 30 is provided with a plurality of stop places (not mark), as more than three or three.Like this, control solenoid 30 just can come the coupled end of control linkage bar 31, moves it to the stop place of setting.This all is to realize easily for a person skilled in the art.And then, by connecting link 31 glass plate 23 is rotated a certain angle at every turn.Thereby can form respectively have out of phase the phase shift candy strip to project on the body surface 16.In addition, other devices also can be controlled the rotation of glass plate 23 as stepper motor.
Fig. 4 is the synoptic diagram of the rotation of glass plate with the generation phase shift.In this synoptic diagram, be example with the incident ray 40 of parallel to the axis 29 (shown in Figure 2).When glass plate 23 rotates an angle [alpha] with respect to a plane 42 perpendicular to axis 29, incident ray 40 reflects glass plate 23 in, and it is exported light 41 and has just moved one apart from d with respect to incident ray 40 translations.When translation distance d was equivalent to the 1/N (N be integer and more than or equal to 3) of the pitch of grating 22, the candy strip that form this moment just is 2 π/N with respect to the phase shift angle of next-door neighbour's candy strip, and was well-known to those skilled in the art.In one embodiment, when the thickness of glass plate 23 is t, when refraction coefficient was n, the translation distance d of incident ray 40 just was like this:
Like this, just can easier realize the phase shift angle of a candy strip by the control angle [alpha] with respect to next-door neighbour's candy strip.
In addition, when design phase shift striped generation device 15, should be noted that and avoid increasing too much optical aberration.In scattered beam, the glass plate of inclination can be introduced a large amount of spherical aberrations and astigmatic aberration in the candy strip of projection.The thickness of glass plate is big more, and the angle of inclination is big more, and the aberration of Zeng Jiaing is just many more so.Therefore, when design, need consider whether the optical design in the phase shift striped generation device 15 can be accepted with the aberration of determining to increase in projected pattern.
Again as shown in Figure 1, CCD induction installation 140 end that be arranged at sniffer 10 17 interior (shown in dotted line) parallel with the rear end of optical fiber image transmission beam 152.Projecting lens 153 and imaging len 141 can be arranged at the rear portion of induction installation 140 and optical fiber image transmission beam 152 simultaneously respectively.In one embodiment, projecting lens 153 has identical cone angle and magnification with imaging len 141, like this with guarantee to have preferably the visual field (Field of View, FOV) and the depth of field (Depth of View, DOV).The resolution of sniffer and precision depend on its baseline spacing to a great extent.In embodiments of the present invention, its parallax range is the distance of 141 of projecting lens 153 and imaging lens.Distance between the two is big more, and the Measurement Resolution of sniffer and precision are high more.Therefore, in order to improve the resolution of system, when projecting lens 153 and imaging len 141 were arranged in the end 17 of sniffer 10 simultaneously, projecting lens 153 was arranged at the one side in terminal 17 and imaging lens 141 are arranged at the adjacent another sides in terminal 17.
The pattern of exporting in optical fiber image transmission beam 152 rear ends is preferably and comprises the parallel bright dark fringe that contains the dextrorotation intensity pattern.This intensity pattern is also square, trapezoidal, triangle or other shapes.This striped is other stripeds also, can carry out the striped of phase shift analysis as curve striped, waveform striped, zigzag striped or other.
In one embodiment, when the groove of grating 22 became square-wave profile, formed grating pattern will be a square wave pattern.This can may produce nonlinearity erron in follow-up phase shift is calculated.In addition, optical fiber image transmission beam 152 may produce a kind of wave pattern of not expecting on body surface 16.So, in one embodiment, can adjust the position of projecting lens 153, so that the focussing plane of the vicinity of the rear end of optical fiber image transmission beam 152 and projecting lens 153 has certain distance, like this, just can change the wave pattern of not expecting into the pattern of expectation.Simultaneously, projecting lens 153 can be equivalent to a spatial filter and square wave pattern is changed into the dextrorotation pattern reduces nonlinearity erron.
Shown in Fig. 1-2, the shape of body surface 16 can exert an influence to the phase shift candy strip that projects to the grating 22 on it, as makes it produce distortion etc.As shown in Figure 1, CCD induction installation 140 receives the reflection ray of each pattern that produces distortion or the pattern after the projection so that follow-up body surface 16 is rebuild.The reconstruction of body surface 16 can be used existing phase shift algorithm, in processing unit, at first obtain information integrated obtained a wrapped phase (Phase-wrapped) figure from the phase shift candy strip, then this phase diagram is carried out phase place and unpack and obtain phase unwrapping (Phase-unwrapped) figure, thereby realization is to the reconstruction of body surface 16.
In one embodiment, use three step phase-shift methods (Three-step Phase-shifting Algorithm) that body surface 16 is rebuild.Shown in Fig. 2-3, can form three candy strips that have out of phase respectively just drive glass plate 23 rotations.In one embodiment, as if 120 ° at interval of every two adjacent candy strips in the candy strip of three outs of phase, the phase shift angle of these three phase shift candy strips can be respectively-2 π/3,0 so, and 2 π/3.At this moment, the intensity I of each pixel on three out of phase candy strips (x y) is respectively:
I
1(x，y)＝A+M?cos[φ(x，y)-2π/3]
I
2(x，y)＝A+M?cos[φ(x，y)]
I
3(x，y)＝A+M?cos[φ(x，y)+2π/3]
Wherein, A represents the background light intensity, and M represents the contrast of system, and (x y) promptly is the wrapped phase (the not phase place of Zhan Kaiing) of each pixel on the stripe pattern that needs to determine to φ.By above-mentioned three equations are carried out combined calculation, just can obtain wrapped phase φ (x y) is:
Work as I
1, I
2, I
3When known, just (x, y), (x y) is in-π is between the π phase that obtain this moment the phase that can not launched.Then, (x y) launches and obtains the absolute phase of each pixel on the stripe pattern to phase to utilize the existing phase shift method of development.At last, (x, y), this all is to realize easily for a person skilled in the art to utilize the known parameters of the absolute phase obtain and system to calculate the absolute depth coordinate Z of each pixel.Like this, (x just can finish the reconstruction to body surface 16 after y) to the true altitude Z by obtaining each pixel on the body surface.In embodiments of the present invention, the measurement result accuracy of using 10 pairs of objects of sniffer to carry out is very high.
Fig. 5 is the synoptic diagram of another embodiment of phase shift striped generation device in borescope or the endoscopic system.In this embodiment, the structural similarity of the embodiment shown in its structure and Fig. 2.As shown in Figure 5, phase shift striped generation device 15 comprises that an optical fiber passes light beam 50, and it is arranged between light source 150 and the grating 22, and does not need to be provided with condenser 21 again.Simultaneously, optical fiber image transmission beam 152 also can be directly relative with glass plate 23.Like this, the light that produces from light source 150 can pass successively and project on the body surface 16 after optical fiber passes light beam 50, grating 22, glass plate 23 and optical fiber image transmission beam 152.In the present embodiment, optical fiber passes the fibre bundle that light beam 50 is incoherent (Non-coherent) fibre bundle or half-phase dried (Semi-coherent).In addition, in an embodiment of the present invention, the element in all elements, particularly phase shift striped generation device 15 all is arranged in the sniffer 10 with reduced size simultaneously.Like this, for the user easily, directly 10 pairs of handheld detection devices are put than deep-seated or the position that is difficult to enter is detected.
Though describe the present invention in conjunction with the specific embodiments, those skilled in the art will appreciate that and to make many modifications and modification the present invention.Therefore, recognize that the intention of claims is to cover all such modifications and the modification in true spirit of the present invention and the scope.
Claims (19)
1. sniffer comprises:
Light source, it can produce light;
Grating, described light passes this grating can produce grating pattern;
Movable transparent panel, it can change described grating pattern into a plurality of phase shift candy strips;
Optical fiber image transmission beam, it can be on described a plurality of phase shift stripe pattern projection to a body surface and produce candy strip after the projection;
Imaging device, it can obtain the image of the candy strip after the projection; And
Processing unit, it can utilize the image of described acquisition to rebuild described body surface.
2. sniffer as claimed in claim 1, wherein said transparent panel comprises glass plate.
3. sniffer as claimed in claim 1 further comprises solenoid, and this solenoid can drive described transparent panel and rotate.
4. sniffer as claimed in claim 1 further comprises:
Projecting lens, it is arranged at after the described optical fiber image transmission beam, with the phase shift stripe pattern projection of described optical fiber image transmission beam transmission to described body surface; And
Imaging len, it comes from the light guiding on the body surface and focuses on the described imaging device.
5. sniffer as claimed in claim 1, wherein said sniffer comprises borescope.
6. phase shift striped generation device comprises:
Light source, it can produce light;
Grating, described light passes this grating can produce grating pattern;
Movable glass plate, it can change described grating pattern into a plurality of phase shift candy strips; And
Optical fiber image transmission beam, it can be on described a plurality of phase shift stripe pattern projection to a body surface.
7. phase shift striped generation device as claimed in claim 6 further comprises condenser, and this condenser is arranged between described light source and the described grating and comes from the light of light source to described grating with calibration.
8. phase shift striped generation device as claimed in claim 6 further comprises the striped convergent lens, and these lens are arranged at that to be used between described glass plate and the described optical fiber image transmission beam that the light that passes glass plate is conveyed into described fibre optic image transmission intrafascicular.
9. phase shift striped generation device as claimed in claim 6, wherein the phase shift candy strip comprises square wave pattern.
10. phase shift striped generation device as claimed in claim 6 further comprises projecting lens, and this projecting lens is arranged at after the described optical fiber image transmission beam, with the phase shift stripe pattern projection of described optical fiber image transmission beam transmission to described body surface.
11. phase shift striped generation device as claimed in claim 10, the focussing plane of the vicinity of described projecting lens is departed from the rear end of wherein said optical fiber image transmission beam.
12. phase shift striped generation device as claimed in claim 6 comprises that further the solenoid that links to each other with glass plate rotates to drive glass plate.
13. phase shift striped generation device as claimed in claim 6 comprises that further the optical fiber that is arranged between light source and the grating passes light beam, be used for from the light transmission of light source to grating.
14. it is that non-coherent optical fiber passes light beam that phase shift striped generation device as claimed in claim 13, wherein said optical fiber pass light beam.
15. a method of using sniffer comprises:
Make the light that comes from light source pass grating and form grating pattern;
Make described grating pattern pass movable glass plate and form a plurality of phase shift candy strips;
Make described phase shift candy strip pass optical fiber image transmission beam to project on the body surface;
Obtain stripe pattern after the projection from body surface; And
The described stripe pattern that utilization is obtained is rebuild described body surface.
16. method as claimed in claim 15 further comprises and utilizes the described glass plate of solenoid-activated to rotate.
17. a method of using phase shift striped generation device comprises:
Make the light that comes from light source pass grating and form grating pattern;
Make described grating pattern pass movable glass plate and form a plurality of phase shift candy strips; And
Make described phase shift candy strip pass optical fiber image transmission beam to project on the body surface.
18. method as claimed in claim 17 further comprises and utilizes the described glass plate of solenoid-activated to rotate.
19. method as claimed in claim 17 further is included in described phase shift candy strip and passes and make described phase shift candy strip pass the striped convergent lens that is arranged between described glass plate and the described optical fiber image transmission beam earlier before the described optical fiber image transmission beam.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101957183A (en) * | 2010-09-26 | 2011-01-26 | 深圳大学 | Structured light projection-based high-speed three-dimensional measurement system |
| CN103322937A (en) * | 2012-03-19 | 2013-09-25 | 联想(北京)有限公司 | Method and device for measuring depth of object using structured light method |
| 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 |
| US8681217B2 (en) | 2010-07-21 | 2014-03-25 | Olympus Corporation | Inspection apparatus and measurement method |
| CN104075655A (en) * | 2013-03-27 | 2014-10-01 | 南京理工大学 | Fizeau synchronous phase-shifting interference test device adopting rotary radial grating |
| CN106091988A (en) * | 2016-06-17 | 2016-11-09 | 太原科技大学 | A kind of compensation method of high-temperature forging three-dimensional dimension certainty of measurement |
| WO2021238214A1 (en) * | 2020-05-24 | 2021-12-02 | 奥比中光科技集团股份有限公司 | Three-dimensional measurement system and method, and computer device |
| CN114061488A (en) * | 2021-11-15 | 2022-02-18 | 华中科技大学鄂州工业技术研究院 | Object measuring method, system and computer readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8681217B2 (en) | 2010-07-21 | 2014-03-25 | Olympus Corporation | Inspection apparatus and measurement method |
| CN101957183A (en) * | 2010-09-26 | 2011-01-26 | 深圳大学 | Structured light projection-based high-speed three-dimensional measurement system |
| CN103322937A (en) * | 2012-03-19 | 2013-09-25 | 联想(北京)有限公司 | Method and device for measuring depth of object using structured light method |
| CN104075655A (en) * | 2013-03-27 | 2014-10-01 | 南京理工大学 | Fizeau synchronous phase-shifting interference test device adopting rotary radial grating |
| 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 |
| CN103383360B (en) * | 2013-07-29 | 2016-01-13 | 重庆理工大学 | A kind of thin strap continuous casting blank surface defects sinusoidal grating phase shift detection device and detection method |
| CN106091988A (en) * | 2016-06-17 | 2016-11-09 | 太原科技大学 | A kind of compensation method of high-temperature forging three-dimensional dimension certainty of measurement |
| CN106091988B (en) * | 2016-06-17 | 2018-09-11 | 太原科技大学 | A kind of compensation method of high-temperature forging three-dimensional dimension measurement accuracy |
| WO2021238214A1 (en) * | 2020-05-24 | 2021-12-02 | 奥比中光科技集团股份有限公司 | Three-dimensional measurement system and method, and computer device |
| CN114061488A (en) * | 2021-11-15 | 2022-02-18 | 华中科技大学鄂州工业技术研究院 | Object measuring method, system and computer readable storage medium |
| CN114061488B (en) * | 2021-11-15 | 2024-05-14 | 华中科技大学鄂州工业技术研究院 | Object measurement method, system and computer readable storage medium |
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Application publication date: 20091014 |