CN106197275B - Any face heart in blind cylindrical hole center is extracted in radiographic measurement sits calibration method - Google Patents
Any face heart in blind cylindrical hole center is extracted in radiographic measurement sits calibration method Download PDFInfo
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- CN106197275B CN106197275B CN201610585867.7A CN201610585867A CN106197275B CN 106197275 B CN106197275 B CN 106197275B CN 201610585867 A CN201610585867 A CN 201610585867A CN 106197275 B CN106197275 B CN 106197275B
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- triangular prism
- regular triangular
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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
Abstract
Any face heart in blind cylindrical hole center is extracted in a kind of radiographic measurement sits calibration method, it is the method extracted using coordinate extraction element, coordinate extraction element includes regular triangular prism and the lever that is connected on regular triangular prism, wherein fixedly inlay card is in the end of lever one end at an angle of regular triangular prism, and the upper surface of regular triangular prism and the upper surface of lever are in the same plane；Method includes: that in the regular triangular prism insertion blind hole in coordinate extraction element, will make in regular triangular prism bottom surface and blind hole end face to be measured in the same plane；The inner wall of rib and blind hole where two angles on regular triangular prism far from lever is in close contact；360 degree of regular triangular prism are rotated by lever, the circumscribed circle center mark point for acquiring regular triangular prism upper surface by way of radiographic measurement in rotary course is formed by track；The center of circle O for obtaining track composition is the center of circle of end face to be measured in blind hole.The present invention is characterized by the center of circle of fitting circle has higher precision to the gaging hole hole heart, will not damage object under test.
Description
Technical field
The present invention relates to a kind of extraction blind cylindrical hole hole hearts to sit calibration method.More particularly to being mentioned in a kind of radiographic measurement
Any face heart in blind cylindrical hole center is taken to sit calibration method.
Background technique
In machining, it is very versatile method using hole as positioning datum between process, if " plane and two pits " method
It is the Classic Geiger location approach in machining.But due to hole processing when there are allowable error, the upper deviation of positioning pin cannot surpass
The lower deviation of via hole.When actual size when hole reaches the upper deviation, the franchise in hole is just inevitably changed into position error.It is existing
Porose orientation problem can be solved using coordinate measuring machine, and the three coordinate machine detection hole heart can achieve higher measurement accuracy,
But since three coordinate machine needs workpiece off-line measurement cannot achieve On-line rapid measurement in operation.It three sits simultaneously
Mapping amount needs to demarcate in advance in measurement process, higher to measurement environmental requirement, and the use cost of three coordinate measuring machine
There is also higher problems.In order to solve this problem, it is thus proposed that " the soft positioning of image " method.It is hole with visual sensor
Imaging, utilizes image processing techniques drawing holes heart coordinate.At this point, if the deviation from circular from hole is negligible, hole
Scale error will no longer image hole heart position.
" the soft positioning of image " there are also problems for method --- visual sensor be borescopic imaging generally yield be hole end surface picture.
If there are chamferings for hole end surface, and chamfering and hole decentraction, the hole heart finally calculated may not be able to correctly characterize the reality in hole
The border centre of location.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of shadows quick, accurate, versatile, measurement range is big
Calibration method is sat as extracting any face heart in blind cylindrical hole center in measurement.
The technical scheme adopted by the invention is that: any face heart in blind cylindrical hole center is extracted in a kind of radiographic measurement to be sat
Calibration method is mentioned using the coordinate extraction element for extracting any face heart coordinate in blind cylindrical hole center in radiographic measurement
The method taken, the coordinate extraction element include regular triangular prism and the lever that is connected on the regular triangular prism, wherein institute
Fixedly inlay card is in the end of described lever one end at one angle of the regular triangular prism stated, and the upper surface of the regular triangular prism and institute
State the upper surface of lever in the same plane；The method includes the following steps:
1) by the regular triangular prism insertion blind hole in coordinate extraction element, make end face to be measured in regular triangular prism bottom surface and blind hole
In the same plane；
2) inner wall of rib and the blind hole where two angles on regular triangular prism far from lever is in close contact；
3) 360 degree of regular triangular prism are rotated by lever, acquires positive trigone by way of radiographic measurement in rotary course
The circumscribed circle center mark point of column upper surface is formed by track；
It 4) is concentric circles because step 3) is formed by end face to be measured in the circle and blind hole of track composition, to obtain positive trigone
The circumscribed circle center mark point of column upper surface be formed by track composition center of circle O be end face to be measured in blind hole the center of circle.
In the rotary course of step 3), to make rib where two angles on regular triangular prism far from lever with it is described blind
The inner wall in hole is in close contact always.
Any face heart in blind cylindrical hole center is extracted in radiographic measurement of the invention sits calibration method, view-based access control model sensing
Device has the characteristics that quick, accurate, versatile, measurement range is big, can provide specific measured value, facilitate commercial measurement with
Scientific research uses.The present invention has the characteristics that following specific:
1, the convenience measured: measuring compared to coordinate measuring machine, and measurement method of the invention is not needed object under test
It is moved on coordinate measuring machine.Calibration and the debugging for setting up camera simultaneously are more convenient compared to coordinate measuring machine.Measuring instrument body
Product is small, transport, installation convenience.
1) measurement is general: measurement method according to the present invention can design production measuring device of different specifications and sizes,
The measuring device of different size is selected according to the range in aperture to be measured.
2) accuracy measured: using the location drawing picture of camera acquisition image tagged point, the fortune of image tagged point is fitted
Dynamic rail mark.Since the precision of radiographic measurement is very high, while being fitted motion profile and having mature mathematical algorithm.Therefore pass through fitting
The round center of circle, which is characterized, has higher precision to the gaging hole hole heart.
The safety of measurement: although in measurement process being contact measurement, fierce machine does not occur with object under test
Tool collision, will not damage object under test.
Detailed description of the invention
Fig. 1 is the coordinate extraction that any face heart coordinate in blind cylindrical hole center is extracted in the radiographic measurement of the invention used
Device；
Fig. 2 is the measuring principle extracted any face heart in blind cylindrical hole center in this hair radiographic measurement and sit calibration method
Figure；
Fig. 3 is the measurement process extracted any face heart in blind cylindrical hole center in this hair radiographic measurement and sit calibration method
Figure.
In figure
1: regular triangular prism 2: lever
3: blind hole 4: rib
5: rib 6: the circumscribed circle center of circle
7: track
Specific embodiment
Below with reference to embodiment and attached drawing to any face heart in extraction blind cylindrical hole center in radiographic measurement of the invention
Calibration method is sat to be described in detail.
Any face heart in blind cylindrical hole center is extracted in radiographic measurement of the invention and sits calibration method, is using in Fig. 1
Shown in the method that the coordinate extraction element of any face heart coordinate in blind cylindrical hole center extracts is extracted in radiographic measurement,
The coordinate extraction element, as shown in Figure 1, include regular triangular prism 1 and the lever 2 that is connected on the regular triangular prism 1,
Described in fixedly inlay card is in the end of described 2 one end of lever an angle of regular triangular prism 1, and the regular triangular prism 1 is upper
The upper surface of end face and the lever 2 in the same plane, in figure 6 be 1 upper surface of regular triangular prism the circumscribed circle center of circle；Described
Method includes the following steps:
1) as shown in Figure 1, by coordinate extraction element regular triangular prism 1 be inserted into blind hole 3 in, make 1 bottom surface of regular triangular prism with
End face to be measured is in the same plane in blind hole 3；
2) inner wall of rib 4,5 and the blind hole 3 where two angles on regular triangular prism 1 far from lever 2 is closely connect
Touching；
3) as shown in Figure 2 and Figure 3, regular triangular prism 1 is rotated by 360 ° by lever 2, it is convenient for measurement, coordinate can be extracted
The lever of device is placed on the outside of blind hole to be measured, facilitates fixation.It is acquired by way of radiographic measurement in rotary course
The circumscribed circle center mark point 6 of 1 upper surface of regular triangular prism is formed by track 7.Rotary course in, wanted in rotary course
It is in close contact the inner wall of rib 4,5 and the blind hole 3 on regular triangular prism 1 where two angles of separate lever 2 always；
Camera can be placed in 1 surface appropriate location of triangular prism, it is ensured that the 1 top end face circumscribed circle center of circle of triangular prism, 6 institute
The track 7 of formation is in the visual field of camera.
The 1 top end face circumscribed circle center of circle 6 of triangular prism on coordinate acquisition extraction element as much as possible is answered to be formed in the measurements
Track 7 image, while it is excessive to guarantee that the rotation angle of coordinate extraction element between every two Image Acquisition point not change.
To guarantee that collected data are accurate.
4) because step 3) is formed by the circle of the composition of track 7 and end face to be measured in blind hole 3 is concentric circles, to obtain positive three
The circumscribed circle center mark point 6 of 1 upper surface of prism be formed by the composition of track 7 center of circle O be end face to be measured in blind hole 3 circle
The heart.
Claims (2)
1. extracting any face heart in blind cylindrical hole center in a kind of radiographic measurement sits calibration method, which is characterized in that be using
The method that the coordinate extraction element of any face heart coordinate in blind cylindrical hole center extracts is extracted in radiographic measurement, it is described
Coordinate extraction element includes regular triangular prism (1) and the lever (2) being connected on the regular triangular prism (1), wherein it is described just
Fixedly inlay card is in the end of the lever (2) one end at one angle of triangular prism (1), and the upper surface of the regular triangular prism (1)
In the same plane with the upper surface of the lever (2)；The method includes the following steps:
1) by regular triangular prism (1) insertion blind hole (3) in coordinate extraction element, make in regular triangular prism (1) bottom surface and blind hole (3)
End face to be measured is in the same plane；
2) inner wall of rib (4,5) and the blind hole (3) where two angles on regular triangular prism (1) far from lever (2) is tight
Contiguity touching；
3) (1) 360 degree of regular triangular prism is rotated by lever (2), acquires positive three by way of radiographic measurement in rotary course
The circumscribed circle center mark point (6) of prism (1) upper surface is formed by track (7)；
4) because step 3) is formed by the circle of track (7) composition and end face to be measured in blind hole (3) is concentric circles, to obtain positive three
The center of circle O that the circumscribed circle center mark point (6) of prism (1) upper surface is formed by track (7) composition is to be measured in blind hole (3)
The center of circle of end face.
2. any face heart in blind cylindrical hole center is extracted in radiographic measurement according to claim 1 sits calibration method,
Be characterized in that, in the rotary course of step 3), to make on regular triangular prism (1) far from lever (2) two angles where rib (4,
5) inner wall with the blind hole (3) is in close contact always.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610585867.7A CN106197275B (en) | 2016-07-21 | 2016-07-21 | Any face heart in blind cylindrical hole center is extracted in radiographic measurement sits calibration method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610585867.7A CN106197275B (en) | 2016-07-21 | 2016-07-21 | Any face heart in blind cylindrical hole center is extracted in radiographic measurement sits calibration method |
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| CN106197275A CN106197275A (en) | 2016-12-07 |
| CN106197275B true CN106197275B (en) | 2019-03-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201170711Y (en) * | 2008-03-26 | 2008-12-24 | 春兴铸造(苏州工业园区)有限公司 | No-go end feeler gage |
| CN101957185A (en) * | 2010-09-14 | 2011-01-26 | 西安交通大学 | Longhole axis straightness measuring device based on self correction and measurement method thereof |
| CN102435124A (en) * | 2011-09-08 | 2012-05-02 | 中冶辽宁德龙钢管有限公司 | Steel pipe out-of-roundness measuring method and measuring scale thereof |
| CN103185562A (en) * | 2011-12-31 | 2013-07-03 | 中航威海船厂有限公司 | Round hole inner diameter measuring instrument |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK2300777T3 (en) * | 2008-06-18 | 2013-11-04 | Chris Marine Ab | Cylinder Diameter Measurement |
| JP6159294B2 (en) * | 2014-06-02 | 2017-07-05 | 住友ゴム工業株式会社 | Tire tread shape measuring method and tread shape measuring apparatus used therefor |
-
2016
- 2016-07-21 CN CN201610585867.7A patent/CN106197275B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201170711Y (en) * | 2008-03-26 | 2008-12-24 | 春兴铸造(苏州工业园区)有限公司 | No-go end feeler gage |
| CN101957185A (en) * | 2010-09-14 | 2011-01-26 | 西安交通大学 | Longhole axis straightness measuring device based on self correction and measurement method thereof |
| CN102435124A (en) * | 2011-09-08 | 2012-05-02 | 中冶辽宁德龙钢管有限公司 | Steel pipe out-of-roundness measuring method and measuring scale thereof |
| CN103185562A (en) * | 2011-12-31 | 2013-07-03 | 中航威海船厂有限公司 | Round hole inner diameter measuring instrument |
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Effective date of registration: 20210111 Address after: 300350 No.3, Wanggang Road, Jinnan Economic Development Zone (West District), Tianjin Patentee after: ATV (Tianjin) Technology Co.,Ltd. Address before: 300072 Tianjin City, Nankai District Wei Jin Road No. 92 Patentee before: Tianjin University |
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