CN103759637B - A kind of subsidiary target - Google Patents
A kind of subsidiary target Download PDFInfo
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- CN103759637B CN103759637B CN201410003023.8A CN201410003023A CN103759637B CN 103759637 B CN103759637 B CN 103759637B CN 201410003023 A CN201410003023 A CN 201410003023A CN 103759637 B CN103759637 B CN 103759637B
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- station
- measuring staff
- ball
- index
- point
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Abstract
The present invention relates to a kind of subsidiary target, belong to field of measuring technique.The measurement target drone of the present invention includes a measuring staff, measuring staff rotates over to be equipped with and turns station ball, this turn of station is uniformly laid with index aperture on ball surface, a measuring stick that can rotate also it is installed with measuring staff on this measuring staff, it is provided with index point on one face of this measuring stick, in use, after video camera is measured in an available field of view, mobile camera is to another position, ensure that turning station ball pose does not changes, rotate measuring staff makes the one side posting index point just to video camera simultaneously, and record the anglec of rotation of measuring staff, simultaneously by turning station ball and turning each index aperture on the ball of station, mutual relation after can obtaining turning station and before turn station, some groups of coordinate figures can be carried out space splicing by the mutual relation between them, realize the reconstruct to heavy parts three-dimensional appearance.
Description
Technical field
The present invention relates to a kind of subsidiary target, belong to field of measuring technique.
Background technology
The most large-sized curved surface obtains widely should at aspects such as auto industry, boats and ships and spacecraft profiles
With, along with modern processing and manufacturing and the development need of production operation, the measurement of heavy parts three-dimensional geometry size is
Become modern reverse-engineering and the base support technology of Product Digitalization Design and manufacture, and more and more fill
Join, the field heavy parts the most in the urgent need to address such as the tool locating of quality control, on-line checking, industrial products
Three-dimensional measurement.Along with computer technology, electronics, being gradually improved and image procossing, mould of optical technology
The continuous progress of the technology such as formula identification, computer vision measurement technology is rapidly developed, and has been increasingly becoming large-scale
The topmost measurement means of piece surface three-dimensional information.It is currently based on the heavy parts measurement technology master of monocular vision
Have: geometric similarity method is measured, geometric constraints method is measured, Structure light method is measured, geometrical optics approach is measured
With the measurement that auxiliary target mapping amount, the most only auxiliary target mapping amount can realize the invisible point in space.
Generally be configured with the labelling with distinct characteristic on target to produce index point, according to index point luminous with
No, target can be divided into gauge without light source target and have light source target two class, and wherein gauge without light source target utilizes on target
Special pattern produces index point, usually obtains preferable index point image, also needs to use specific light source to irradiate target,
This kind of target is affected by environment bigger；Having light source target to utilize luminous body, such as LED produces index point, tradition
There is light source target to determine light point area by two-value method, utilize centroid method or ellipse fitting method to extract in index point
The heart, due to binary conversion treatment and the index point different angles imaging of image, by centroid method or ellipse fitting method
The optical spot centre proposed is not correspond to same point in space so that certainty of measurement reduces.
Summary of the invention
It is an object of the invention to provide a kind of subsidiary target, to solve current subsidiary target in survey
Measuring during amount is limited in scope causes all tested points in heavy parts being measured complete problem.
The present invention solves that above-mentioned technical problem provides a kind of subsidiary target, this measurement target drone includes a survey
Bar, measuring staff rotates over to be equipped with and turns station ball, and this turn of station is uniformly laid with index aperture, on this measuring staff on ball surface
Also it is installed with a measuring stick that can rotate with measuring staff, a face of this measuring stick is provided with index point, should
Face when measuring the most just to video camera, be fixedly installed below described turn of station ball be carved with angle value turn platform,
For recording the anglec of rotation of measuring staff.
Index aperture on described turn of station ball is cylindrical hole, and the axis of each index aperture intersects with the centre of sphere turning station ball.
Described index point includes 16 circular light echo reflection auxiliary sign points and 4 measurement index points, described
In 16 circular light echo reflection auxiliary sign points, every 4 auxiliary sign points are rectangle distribution, 4 described measurements
It is respectively provided with on the diagonal intersection point of 4 the auxiliary sign points being respectively rectangle distribution with index point.
It is provided with glass particle on described index point, is used for forming bianry image.
The lower section of described measuring staff is provided with gauge head, equipped with triggering switch on gauge head, with the sampling controlling measured point.
The invention has the beneficial effects as follows: the measurement target drone of the present invention includes a measuring staff, measuring staff rotates over and is equipped with
Turning station ball, this turn of station is uniformly laid with index aperture on ball surface, and this measuring staff is also installed with one can be with measuring staff
The measuring stick rotated, a face of this measuring stick is provided with index point, and the present invention in use, works as video camera
After measuring in an available field of view, mobile camera is to another position, it is ensured that turns station ball pose and does not sends out
Changing, rotates measuring staff simultaneously and makes to post the one side of index point just to video camera, and record the anglec of rotation of measuring staff,
Simultaneously by turning each index aperture on station ball and turn station ball, the mutual pass after can obtaining turning station and before turn station
Some groups of coordinate figures can be carried out space splicing by the mutual relation between them, it is achieved to large-scale by zero by system
The reconstruct of part three-dimensional appearance, the present invention can turn station essence in the range of 1000mm × 1000mm × 1000mm measures
Degree meets measurement requirement, it is achieved that to heavy parts quick, in high precision, on a large scale, the automatic survey of low cost
Amount and reconstruction.
Accompanying drawing explanation
Fig. 1 is the structure chart that monocular vision measures system；
Fig. 2 is the structural representation of subsidiary target of the present invention；
Fig. 3 is the structural representation turning station ball of subsidiary target of the present invention；
Fig. 4 is the structural representation turning platform of subsidiary target of the present invention；
Fig. 5 is the distribution schematic diagram surveying the upper index point of rod in subsidiary target of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is further described.
The subsidiary target of the present invention, as in figure 2 it is shown, include measuring staff 1, measuring staff 1 is rotatably equipped with station
Ball 2, is installed with below turn station ball 2 and turns platform 3, measuring staff 1 is also installed with and can revolve with measuring staff 1
The survey rod 4 turned, surveys and is provided with index point on a face of rod 3, be provided with gauge head 5 below measuring staff 1.Turn station
Ball 2 is a spheroid, as it is shown on figure 3, according to certain angle uniformly in warp and the phase of parallel on its outer surface
Handing over and be laid with index aperture on position, index aperture is the cylindrical hole G less than spherome surface1,G2,…,Gn, each index aperture
Axis intersect with the centre of sphere, the colored light echo reflection each index aperture being pasted shades of colour respectively different is circular thin
Patch, each index aperture position in auxiliary target is uniquely determined by colour code, enters by turning index aperture on the ball of station
Row space turns station and splicing, it is achieved the reconstruct to the three-dimensional appearance of heavy parts.Turn platform 3 as shown in Figure 4,
Turn the angle being carved with 360 degree of uniform encodings on platform 3, the angle of the rotation of measuring staff when measuring of fighting in different parts for display,
Survey rod 3, as it is shown in figure 5, be an ater cuboid, one of them surface is provided with known to dimension information
16 circular light echo reflection auxiliary sign point N1,N2,…,N16With 4 measurement index point P1,P2,P3,P4, every 4
Individual auxiliary sign point rectangularity is distributed, and is respectively at rectangular 4 summits, and 16 auxiliary sign points are divided into
4 rectangular profile regions, it is cornerwise that 4 measurement index points are respectively at above-mentioned 4 rectangular region
On intersection point, each index point is provided with the glass particle of a kind of high index of refraction, and reflex strength is high, surveys rod with black
Forming sharp contrast, it is easy to be separated with background light source, to form clear and prominent bianry image, surveying rod has
The one side of index point is original position with turning platform the tangent, and during measurement, hand-held survey rod both sides make to post index point
One side just to video camera 6.
Gauge head 4 has good rigidity and sphericity, it is possible to detect the point on various surfaces externally and internally, gauge head flexibly
Being provided with triggering switch on 4, to facilitate the sampling controlling measured point, general selection sphericity height has high-hardness ceramic
The industrial ruby of what material was made, during measurement, gauge head is tightly against measured point, it is ensured that target is in image acquisition
In stability, the length of measuring staff 5 can be adjusted according to tested part, for satisfied measurement rigid requirements,
Measuring staff length is the shortest more good, increases measuring staff length and can reduce certainty of measurement, but for some difficult position surveyed or
Person's blind spot, measuring staff length can be measured situation according to reality and be adjusted, be particularly suitable for aircraft wing or fuselage, vapour
Chassis or the measurement of the object such as vehicle body, workshop platform, the length considering measuring staff should select
50-110mm。
The operation principle of this subsidiary target is as follows:
First the points of tangency surveying rod labelling being positioned at turns at platform 0 scale, and hand-held survey rod both sides during measurement, order is surveyed
Rod posts index point one side the most just to video camera, and the rigid body put on when auxiliary target measures that head is vertical with part tested point to be connect
When touching, the switch Synchronization Control video camera that triggers on gauge head obtains the characteristic image of target index aperture and index point
Information, image is acquired by image pick-up card；After video camera is measured in an available field of view, move
Dynamic video camera is to another position, it is ensured that turns station ball pose and does not changes, and rotates survey rod simultaneously and makes to post mark
The one side of point, just to video camera, turns the angle value being carved with 360 degree of uniform encodings on platform, and recordable survey rod rotates
Angle value, then start to measure, until by complete for all measurement of curved surface of heavy parts；By image pick-up card
The image transmitting gathered, to computer, uses least square ellipse fitting algorithm to calculate in 16 auxiliary sign points
Heart pixel coordinate, every 4 auxiliary sign dot center can construct tetragon, utilizes tetragon diagonal intersection point to ask
Go out 4 surveying marker dot center pixel coordinate value, it is ensured that during target difference attitude imaging, the mark extracted
Will dot center is corresponding to same point in space, thus improves certainty of measurement.Turn station ball and turn each on the ball of station
Special index aperture, the mutual relation after can obtaining turning station and before turn station, by the mutual relation between them
Some groups of coordinate figures can be carried out space splicing, it is achieved the reconstruct to heavy parts three-dimensional appearance.At 1000mm
In the range of × 1000mm × 1000mm measures, turn station precision and meet measurement requirement.Instant invention overcomes stereoscopic vision
And the technical barrier that other vision measurement technology mark Point matching are difficult, three dimensions splicing is complicated, it is achieved to large-scale
Part quick, in high precision, on a large scale, automatically the measuring and rebuild of low cost.
Claims (5)
1. a subsidiary target, it is characterised in that this measurement target drone includes a measuring staff, turns above measuring staff
Dynamic being equipped with turns station ball, and this turn of station is uniformly laid with index aperture on ball surface, and this measuring staff is also installed with one
Can with measuring staff rotate measuring stick, a face of this measuring stick be provided with index point, this face measure time all the time
Just to video camera, be fixedly installed below described turn of station ball be carved with angle value turn platform, for recording measuring staff
The anglec of rotation, after video camera is measured in an available field of view, mobile camera to another location, protect
Card turns a station ball pose and does not changes, and rotates measuring staff simultaneously and makes the one side posting index point just to video camera, and remembers
The anglec of rotation of record measuring staff, by turning station ball and turning each index aperture on the ball of station, to obtain after turning station and to turn station
Front mutual relation.
Subsidiary target the most according to claim 1, it is characterised in that the labelling on described turn of station ball
Hole is cylindrical hole, and the axis of each index aperture intersects with the centre of sphere turning station ball.
Subsidiary target the most according to claim 1, it is characterised in that described index point includes 16
Individual circular light echo reflection auxiliary sign point and 4 measurement index points, described 16 circular light echos reflection auxiliary mark
In will point, every 4 auxiliary sign points are rectangle distribution, and 4 described measurement index points are respectively provided with respectively in length
On the diagonal intersection point of 4 auxiliary sign points of square distribution.
Subsidiary target the most according to claim 3, it is characterised in that arrange on described index point
There is glass particle, be used for forming bianry image.
Subsidiary target the most according to claim 3, it is characterised in that the lower section of described measuring staff sets
It is equipped with gauge head, equipped with triggering switch on gauge head, with the sampling controlling measured point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003023.8A CN103759637B (en) | 2014-01-03 | 2014-01-03 | A kind of subsidiary target |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003023.8A CN103759637B (en) | 2014-01-03 | 2014-01-03 | A kind of subsidiary target |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103759637A CN103759637A (en) | 2014-04-30 |
| CN103759637B true CN103759637B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410003023.8A Expired - Fee Related CN103759637B (en) | 2014-01-03 | 2014-01-03 | A kind of subsidiary target |
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| Country | Link |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717935A (en) * | 2014-11-30 | 2016-06-29 | 中国科学院沈阳自动化研究所 | Three-dimensional target for visual guidance system |
| CN104807403A (en) * | 2015-04-23 | 2015-07-29 | 上海大学 | Driving light measuring rod for size measurement of large workpiece |
| CN105588484A (en) * | 2016-02-26 | 2016-05-18 | 共享装备股份有限公司 | Measuring arm position-shifting reference correcting device |
| CN110378939B (en) * | 2018-07-27 | 2021-11-02 | 北京京东乾石科技有限公司 | Method, system, device and storage medium for image coding, recognition and tracking |
| CN112665523B (en) * | 2020-11-24 | 2022-04-19 | 北京星航机电装备有限公司 | Combined measurement method for complex profile |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1163952A (en) * | 1997-08-21 | 1999-03-05 | Nippon Steel Corp | Three-dimensional shape measuring target and method for measuring inclination of collimation face |
| US7557936B2 (en) * | 2006-04-12 | 2009-07-07 | Toyota Motor Engineering & Manufacturing North America, Inc. | Digitizer adapter |
| CN101819025A (en) * | 2010-05-02 | 2010-09-01 | 桂林电子科技大学 | Three-dimensional coordinate measuring system of handheld target trinocular camera |
| CN102288106B (en) * | 2010-06-18 | 2013-03-27 | 合肥工业大学 | Large-space visual tracking six-dimensional measurement system and method |
| CN102062578B (en) * | 2010-12-13 | 2012-11-28 | 西安交通大学 | Handheld optical target for measuring visual coordinate and measuring method thereof |
| CN203657743U (en) * | 2014-01-03 | 2014-06-18 | 河南科技大学 | Auxiliary measurement target |
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2014
- 2014-01-03 CN CN201410003023.8A patent/CN103759637B/en not_active Expired - Fee Related
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Granted publication date: 20160817 Termination date: 20170103 |