CN106091927A - A kind of levelling self-luminous Feature target - Google Patents
A kind of levelling self-luminous Feature target Download PDFInfo
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- CN106091927A CN106091927A CN201610537019.9A CN201610537019A CN106091927A CN 106091927 A CN106091927 A CN 106091927A CN 201610537019 A CN201610537019 A CN 201610537019A CN 106091927 A CN106091927 A CN 106091927A
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- target
- pedestal
- levelling
- light source
- self
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
- G01B11/005—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates coordinate measuring machines
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- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
One levelling self-luminous Feature target of the present invention belongs to computer vision measurement field, relates to a kind of levelling self-luminous Feature target design, to realize the measurement of machine tool error.Target is made up of target pedestal, Magnet, heat abstractor, measuring basis, self-luminous parts and 4 groups of levelling bolt six parts.Target pedestal is made up of ferrous metal, has groove bottom it, installs Magnet in groove, and before and after pedestal, 4 faces, left and right have rectangle square hole；Heat abstractor is made up of with radiator fan heat sink.Target ensure that visual imaging and extraction accuracy by photoetching donut index point and high uniformly polishing, three coordinate machine bed is adjusted the depth of parallelism of measuring basis and target base bottom surface by regulation levelling bolt, avoid the introducing of alignment error, finally realize the high-precision detection of machine tool error.This feature target removes and installs conveniently, it is adaptable to the test of dissimilar machine tool error, and single unit system uses portable, dependable performance.
Description
Technical field
The invention belongs to computer vision measurement field, relate to a kind of levelling self-luminous Feature target design, to realize
The measurement of machine tool error.
Background technology
Use computer vision measurement commercial measurement machine tool error, when machine tool table region feature information is inconspicuous, easily cause
The phenomenon such as low, error hiding of feature information extraction precision in image processing process.To this end, need to lathe surface arrangement of features target with
Accurate characterization machine tool motion information.In lathe high-acruracy survey occasion, videogrammetry system is to the characteristic formp of target and system
Manufacturing accuracy proposes very high request.Meanwhile, different measuring requires and under corresponding camera acquisition parameters, the high-quality of characteristic information becomes
As being badly in need of the adjustable high uniform source of light of brightness with suitable polishing mode.Additionally, in order to not introduce other errors, Feature target
Higher assembly precision need to be ensured with platen.In sum, the portable levelling self-luminous feature of a kind of high accuracy of design
Target is most important for improving vision-based detection lathe error precision.
Patent No. CN201410003023 " a kind of subsidiary target " of University Of Science and Technology Of He'nan Li Hang et al. invention is sent out
Understand that one ensures that ball pose of fighting in different parts is constant, rotate measuring staff and make to post one side effectively the regarding in the face of each video camera of index point
, index aperture information uniform in the record measuring staff anglec of rotation and ball of fighting in different parts, through space, splicing realizes heavy parts three
The reconstruct of dimension pattern, but during measuring, need hand-held rod both sides and the gauge head needs surveyed tightly against measured point, affect certainty of measurement,
And be not suitable for the error measure during machine tool motion.The Patent No. of what great waves of Hubei University Of Technology et al. invention
CN201510318656 " a kind of stereo target being applicable to binocular or multi-vision visual dimensional measurement " has invented a kind of regular cube
Structure, the stereo target of four measuring surface uniform coding patches, by measuring probe contact measured point, binocular or multi-vision visual system
Obtaining stereo target image, image procossing is asked for the three-dimensional coordinate of encoded radio and anchor point, is calculated the three-dimensional coordinate of measured point,
But due to reflective encoder patch, ambient lighting is required high and the accuracy of manufacture is relatively low, affect certainty of measurement, additionally this stereo target
Measured object motion can not be followed, it is difficult to realize the error measure during machine tool motion.
Summary of the invention
The technical barrier that the invention solves the problems that is the defect overcoming prior art, has invented one and has been applicable to machine tool error survey
The levelling self-luminous Feature target of amount, under the conditions of solving complex illumination, machine tool error measures a difficult problem.By on the glass substrate
Photoetching high accuracy donut index point constitutes measuring basis to ensure the accuracy of manufacture of machine tool motion information Expressive Features；Use
High uniformly LED light source coordinates external light source controller back lighting, and diffuse-reflectance plate composition self-luminous parts, improves donut
The image quality of index point.Use heat abstractor release LED light source to produce heat and reach cooling-down effect.Each part mentioned above is assembled
Constitutive characteristic target on target pedestal, employing Magnet suction fixed character target is on lathe, at three-dimensional coordinates measurement during use
Adjust 4 groups of levelling bolt positions on machine and ensure the depth of parallelism of measuring basiss and target base bottom surface, it is to avoid introduce target pedestal with
The alignment error of lathe.
The technical solution adopted in the present invention is a kind of levelling self-luminous Feature target, it is characterized in that, target is by target
Pedestal 4, Magnet 8, heat abstractor, measuring basis 2, self-luminous parts and 4 groups of levelling bolt 1 six part compositions；
Described target pedestal 4 is made up of ferrous metal, has groove bottom it, installs Magnet 8, before and after pedestal 4 in groove
Four sides, left and right has rectangle square hole；
Heat abstractor is made up of with radiator fan 7 heat sink 6, and radiator fan 7 is arranged on the intracavity bottom of pedestal 4, dissipates
The power line of Hot-air fan 7 is drawn by the side of target pedestal 4, and the column type heat sink 6 being made into matrix arrangement is arranged on scattered
The top of Hot-air fan 7；
Measuring basis 2 is by photoetching donut index point in substrate of glass, and high uniformly polishing；Diffuse-reflectance plate 3 is arranged on
Below measuring basis 2, both are arranged on target pedestal 4 by 4 groups of levelling bolts 1, and often group levelling bolt 1 includes a full spiral shell
Stricture of vagina bolt and two nuts installed up and down, bolt rotates to screwed hole on target pedestal 4；
Self-luminous parts include LED light source 5, diffuse-reflectance plate 3 and external light source controller 9, and LED light source 5 is arranged on heat radiation
Above plate 6, the power line of LED light source 5 is drawn by the top of target pedestal 4, is connected with external light source controller 9.
The invention has the beneficial effects as follows and ensure that visual imaging by photoetching donut index point and high uniformly polishing
And extraction accuracy, three coordinate machine bed adjusts measuring basis 2 and target pedestal 4 bottom surface by regulating 4 groups of levelling bolts 1
The depth of parallelism, it is to avoid the introducing of alignment error, finally realizes the high-precision detection of machine tool error.Additionally, present invention design
Feature target removes and installs conveniently, it is adaptable to the test of dissimilar machine tool error, and single unit system uses portable, dependable performance.
Accompanying drawing explanation
Fig. 1 is Feature target overall appearance figure, and Fig. 2 is the sectional view of this feature target main part.Wherein: 1-leveling spiral shell
Nail, 2-measuring basis, 3-diffuse-reflectance plate, 4-target pedestal, 5-LED light source, 6-heat sink, 7-radiator fan, 8-Magnet, outside 9-
Portion's light source controller.
Detailed description of the invention
Being embodied as of the present invention is described in detail below in conjunction with the accompanying drawings with technical scheme.
During erecting device, first radiator fan 7 is placed on the target pedestal 4 cavity bottom, and by power line from side
Face is drawn, and puts into heat sink 6, puts into LED light source 5 on heat sink 6 top, and by LED light source 5 power line from target pedestal 4
Side draws, and is connected with external light source controller 9, places diffuse-reflectance plate 3 and measuring basis 2 on levelling bolt 1 in the middle of lower nut.
By the Feature target that assembles on three coordinate measuring machine, the fine setting being measured benchmark 2 position by 4 groups of levelling bolts 1 is made
Measuring basis 2 surface and target pedestal 4 soffit plane degree reach measurement requirement.Feature target after leveling use Magnet 8 solid
Determine on the table.
During machine tool error is measured, first the Feature target that leveling is good is fixed on platen, platen
Motion drives Feature target motion, and sequence image the most in the same time by shooting high-acruracy survey benchmark 2 and is entered by binocular camera
Row processes, and obtains the centre coordinate of every two field picture donut index point, uses concentric by left images of Epipolar geometry principle
The center pixel coordinate of annulus index point reconstructs three-dimensional centre coordinate, compares with ideal trajectory and obtains machine tool error；
As shown in accompanying drawing 1,2, a kind of levelling self-luminous Feature target of the present invention is by target pedestal 4, Magnet 8, measurement
Benchmark 2, self-luminous parts, heat abstractor, levelling bolt 1 six part form, and are respectively directed to every part and are described.
One, target pedestal
The target pedestal 4 of the present invention is the base structure of Feature target, is used for assembling other ingredients of support and passing through
Feature target is fixed on lathe by Magnet 8.Pedestal is the cavity structure that side is identical, places radiator fan the most respectively
7, heat sink 6, LED light source 5, is connected with diffuse-reflectance plate 3 and measuring basis 2 by 4 groups of levelling bolts 1 above pedestal.Target
Pedestal 4 groove at side surface, the heat for being derived by radiator fan 7 exhales target pedestal 4 as early as possible, draws LED light source 5 He simultaneously
The power line of radiator fan 7.Additionally, be can the movable information of accurate characterization lathe, target pedestal 4 bottom surface need to possess high several
What precision and form accuracy.Bottom surface cylinder shape groove is used for placing cylinder-shaped magnet 8 as seen from Figure 2, with by itself and lathe worker
Station is fixed, it is simple to being rapidly assembled and disassembled of different lathe.
Two, measuring basis
Not only have in view of substrate of glass that thermal coefficient of expansion is little, anticorrosive property good, also have that precision is high, hardness is bigger
Feature, it is simple to producing high accuracy donut index point, the measuring basis 2 of manufacture the most of the present invention uses substrate of glass.Circle
There is invariance of much photographing in shape index point, for ensureing that precision carries out photoetching, and reaches micron accuracies.The profile of substrate of glass
A size of 20mm × 20mm, the cylindrical of middle donut index point isInner circle isContour accuracy is ± 1 μ
M, and substrate of glass opens hole at four angles, for through 4 groups of levelling bolts 1.
Three, selfluminous device
The present invention constitutes measuring basis 2, at preposition light by the high accuracy donut index point of photoetching in glass reference
In the case of source, due to refraction and the reflection of light so that index point imaging has shade, affect donut index point center extraction essence
Degree.Therefore, using backlighting arrangement, light source uses LED light source 5.The effect using external light source controller 9 is by adjusting
The brightness of Voltage Cortrol LED light source 5, with meet complex environment measure in donut index point imaging light-source brightness is wanted
Ask.
Using LED light source 5 direct projection, intensity of illumination is weak or strong, and uneven illumination is even, makes donut index point imaging
Quality is low, affects the positioning precision at donut center.Therefore, the even smooth diffuse-reflectance plate 3 of PC need to be used, the even smooth diffuse-reflectance plate 3 of PC,
Also being PC diffuser plate, light transmittance is 60%-80%.Even smooth diffuse-reflectance plate 3 is placed in above LED light source 5, makees by its diffusion
With, uniform whole light-emitting zone so that light-emitting area does not contains dark space, and will not form afterimage on picture, can be effectively improved
Camera imaging effect, thus improve videogrammetry system further.The diffuse-reflectance plate 3 of present invention design is identical with measuring basis 2
The through hole of same size is had, in order to through 4 groups of levelling bolts 1 at size, and four angles.
Four, heat abstractor
In use, caloric value is big for LED light source 5, if dispelling the heat not in time, affects lamp bead service life.Therefore, heat radiation
System is closely coupled with LED light source 5, indispensable.Aluminium sheet is the more commonly used heat sink 6, and heat conductivity is 237W/m K,
And low cost, good mechanical property, it is possible to being processed into Various Complex shape increases area of dissipation.Therefore, the present invention uses aluminum base
Plate, as heat sink 6, is connected with LED light source 5, quick conductive.Meanwhile, for increasing area of dissipation, aluminium base is fabricated to matrix
The column type of arrangement.The heat rapid divergence can derived by heat sink 6 at 6 times placement radiator fans 7 of heat sink is to outside Feature target.
Five, levelling bolt
Do not introduce other errors for accurate characterization machine tool motion information, need to ensure the assembling of Feature target and lathe/
Installation accuracy.It is therefore desirable to there is the preferable depth of parallelism measuring basis 2 surface of Feature target and target pedestal 4 bottom surface.Use three
Measurement of coordinates machine testing donut index point surface and the depth of parallelism of target pedestal 4 bottom surface, rotate four below diffuse-reflectance plate 3
Individual nut realizes the fine setting of donut index point surface location, and is fixed, finally by four nuts above measuring basis 2
Make measuring basis 2 upper surface parallelism error with target pedestal 4 bottom surface less than 3 μm.
The present invention passes through 4 groups of levelling bolt pre-levelings on three coordinate measuring machine so that measure of precision benchmark can be accurate
Characterizing the movable information of lathe, use LED light source backlight illumination measuring basis, external light source controller adjusts light-source brightness, and
The even light action of diffuse-reflectance plate improves the image quality of donut index point, uses Magnet that Feature target is fixed on workbench
On, fast and easy mounts and dismounts, and single unit system uses portable, dependable performance.
Claims (1)
1. a levelling self-luminous Feature target, is characterized in that, target is by target pedestal (4), Magnet (8), heat abstractor, survey
Amount benchmark (2), self-luminous parts and 4 groups of levelling bolt (1) six part compositions；
Described target pedestal (4) is made up of ferrous metal, has groove bottom it, installs Magnet (8), before pedestal (4) in groove
Four sides, rear left and right has rectangle square hole；
Heat abstractor is made up of with radiator fan (7) heat sink (6), and radiator fan (7) is arranged on the intracavity bottom of pedestal (4)
On, the power line of radiator fan (7) is drawn by the side of target pedestal (4), is made into the column type heat sink of matrix arrangement
(6) top of radiator fan (7) it is arranged on；
Measuring basis (2) is made up of photoetching donut index point in substrate of glass, and high uniformly polishing；Diffuse-reflectance plate (3) is pacified
Being contained in measuring basis (2) below, both are arranged on target pedestal (4) by 4 groups of levelling bolts (1), often group levelling bolt bag
Including a screw bolt and two nuts installed up and down, bolt is bottom the upper rotation of target pedestal (4) to screwed hole；
Self-luminous parts include LED light source (5), diffuse-reflectance plate (3) and external light source controller (9), and LED light source (5) is arranged on
Above heat sink (6), the power line of LED light source (5) is drawn and external light source controller (9) by the top of target pedestal (4)
It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610537019.9A CN106091927A (en) | 2016-07-09 | 2016-07-09 | A kind of levelling self-luminous Feature target |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610537019.9A CN106091927A (en) | 2016-07-09 | 2016-07-09 | A kind of levelling self-luminous Feature target |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106091927A true CN106091927A (en) | 2016-11-09 |
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ID=57212647
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610537019.9A Pending CN106091927A (en) | 2016-07-09 | 2016-07-09 | A kind of levelling self-luminous Feature target |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036588A (en) * | 2017-01-13 | 2017-08-11 | 重庆交通大学 | Tunnel surrounding rock displacement monitors point equipment |
| CN107030398A (en) * | 2017-05-27 | 2017-08-11 | 东莞市倡原钣神智能装备有限公司 | A kind of laser cutting machine lathe of quick regulation level |
| CN108061526A (en) * | 2017-12-18 | 2018-05-22 | 嘉兴仁光乌镇科技有限公司 | For detect infrared light curtain whether parallel to screen detection method |
| CN110376705A (en) * | 2019-07-17 | 2019-10-25 | 北京安洲科技有限公司 | A kind of multipurpose diffusing reflection on-gauge plate of tilt adjustable |
| CN114264925A (en) * | 2020-09-16 | 2022-04-01 | 武汉国创科光电装备有限公司 | Quantum dot light-emitting diode testing device and calibration method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036588A (en) * | 2017-01-13 | 2017-08-11 | 重庆交通大学 | Tunnel surrounding rock displacement monitors point equipment |
| CN107030398A (en) * | 2017-05-27 | 2017-08-11 | 东莞市倡原钣神智能装备有限公司 | A kind of laser cutting machine lathe of quick regulation level |
| CN108061526A (en) * | 2017-12-18 | 2018-05-22 | 嘉兴仁光乌镇科技有限公司 | For detect infrared light curtain whether parallel to screen detection method |
| CN110376705A (en) * | 2019-07-17 | 2019-10-25 | 北京安洲科技有限公司 | A kind of multipurpose diffusing reflection on-gauge plate of tilt adjustable |
| CN114264925A (en) * | 2020-09-16 | 2022-04-01 | 武汉国创科光电装备有限公司 | Quantum dot light-emitting diode testing device and calibration method thereof |
| CN114264925B (en) * | 2020-09-16 | 2024-04-12 | 武汉国创科光电装备有限公司 | Quantum dot light emitting diode testing device and calibration method thereof |
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Application publication date: 20161109 |