CN104132612B - A kind of leading screw dimensional parameters detection method and equipment - Google Patents
A kind of leading screw dimensional parameters detection method and equipment Download PDFInfo
- Publication number
- CN104132612B CN104132612B CN201410310800.3A CN201410310800A CN104132612B CN 104132612 B CN104132612 B CN 104132612B CN 201410310800 A CN201410310800 A CN 201410310800A CN 104132612 B CN104132612 B CN 104132612B
- Authority
- CN
- China
- Prior art keywords
- leading screw
- lathe bed
- image acquisition
- image
- lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to a kind of leading screw dimensional parameters detection method and equipment, illuminate by source of parallel light, doubly telecentric camera lens, area array CCD digital camera gathers leading screw raceway section of outline image；Profile sub-pixel edge is extracted with image processing software；Calculate groove-section geometric parameter.The detection equipment of the present invention is mainly made up of test desk lathe bed and the image acquisition component that is arranged on lathe bed, image acquisition component by turntable, bracket, the parallel LED illumination light source being fixed on bracket, doubly telecentric camera lens, area array CCD digital gray scale camera and the image acquisition that can rotate on a spinstand be installed form with process software.Monitor station lathe bed is made up of lathe bed, turn-screw, grating scale displacement transducer and support v block etc..The present invention uses source of parallel light, telecentric lens to can ensure that the External Shape image collected, and is not distorted with distance.Measuring speed is fast.Obtain the measurement result of degree of precision.
Description
Technical field
The invention belongs to machine components detection technique field, relate to part numeral image acquiring method and equipment, can
For, screw thread and the detection of other accessory sizes.
Background technology
Along with Aero-Space, heavy-duty machinery, generating equipment, the development of shipping industry, its design of part is the most multiple
Miscellaneous, method and the required precision of measuring workpiece size are more and more higher.Leading screw is as the precision drive of plant equipment
Parts, play an important role in current industrial production, the most quickly, accurately measure leading screw spatial geometric shape
Size, be a current detection technology difficult problem urgently to be resolved hurrily.
Measuring problem for leading screw raceway profile physical dimension, the method used at present has contact and contactless
Two kinds of metering systems.
The method that contact type measurement uses at present, one is to use steel ball to be placed in ball-screw raceway, recruitment
From leading screw raceway, tool microscope tangentially observes whether contact point is positioned at design required direction.This method accuracy of detection
The highest, and leading screw groove-section geometric parameter can not be obtained.Another kind of contact measurement method is to use contourograph
Along leading screw axially measured leading screw groove-section geometric parameter, then by geometric transform relation, calculate raceway method
To cross section geometric parameter, this measuring method there will be jitter phenomenon when part rise surface, and essence is measured in impact
Degree, and contourograph measurement size scope is smaller, and speed is slow, and equipment price is higher.
The current detection method of non-cpntact measurement, one is optical projection method, and by lead angle, leading screw is rotated pendulum
Put, by optical projector, groove-section actual geometric configuration is amplified and projects on screen, with setting of amplifying
Meter geometry compares, and this method accuracy of detection is relatively low.Another kind is laser detection, uses laser to visit
Head is along groove-section direction traverse measurement surface geometry size, and laser detection interference free performance is poor, and is swashing
When light is less with piece surface angle, detection error is bigger.Also have optical image technology detection method at present, this
The method of kind is by gathering leading screw groove-section digital picture, through Digital Image Processing, conversing geometric parameter,
This method detection speed is higher, and cost is relatively low, is one of the direction of detection technique development from now on.Existing imaging
Detection method uses line array CCD, is driven by motor, leading screw and rolls along detected leading screw axial moving sweep collection
Road contour images, then through image procossing, calculate raceway profile physical dimension, concrete grammar is shown in document " Wu
Jing Chun etc., ball-screw screw thread Surface Parameters non-contact measurement system design and analysis Master's thesis 2012 ".
In this detection method, raceway contour images collection uses scan mode, can kinematic error be incorporated in image,
Whole pixel value is used to be fitted circular arc in image procossing, the central coordinate of circle so obtained and radius size precision
It is difficult to reach testing requirement.
Summary of the invention
Present invention aims to the deficiency that above-mentioned existing detection method exists, propose one image and detect
The method and device of leading screw physical dimension, to improve accuracy of detection, reduces detection equipment cost.
The detection method of the present invention:
1, illuminate by source of parallel light, doubly telecentric camera lens, area array CCD digital camera gathers leading screw raceway profile and cuts
Face image；
2, extract profile sub-pixel edge with image processing software；
3, calculate groove-section geometric parameter.
The detection equipment of the present invention:
Technical scheme: device is mainly made up of test desk lathe bed and the image acquisition component that is arranged on lathe bed, figure
As acquisition component by turntable, install can rotate on a spinstand bracket, be fixed on bracket flat
Row LED illumination light source, doubly telecentric camera lens, area array CCD digital gray scale camera and image acquisition and process software
Composition.Monitor station lathe bed is made up of lathe bed, turn-screw, grating scale displacement transducer and support v block etc..
In image acquisition component, parallel lighting source and telecentric lens are coaxially mounted on bracket.Bracket is arranged on
On turntable, it is desirable to lens axis object distance position overlaps with turntable center of rotation.
Image acquisition component is arranged on monitor station lathe bed rail plate, can be driven by lathe bed leading screw and do water along guide rail
Flat motion, in grating scale displacement transducer, grating is arranged on lathe bed and guide rail parallel, and grating reading head is arranged on
In image acquisition component, it is used for determining that its displacement, tested leading screw are arranged on test desk and support on V-type support,
Tested leading screw is parallel with bed ways.
Image acquisition and physical dimension detection process:
During detection leading screw groove-section geometric parameter, first leading screw is placed on V-type support, adjusts turntable,
The lens axis is made with leading screw axis angle γ to be measured to be
γ=90 °-β
β is leading screw lead angle.
Adjust lens axis position by lathe bed leading screw, make lens axis be positioned at leading screw groove-section immediate vicinity.
Illumination intensity, camera gain and aperture time are set, with collected by camera raceway profile gray level image.
With image processing software the leading screw contour images collected is processed, computing, obtain corresponding geometry
Parameter.
During measurement, telecentric lens and corresponding parallel lighting source can be changed according to tested leading screw diameter, this
Sample just can measure the leading screw diameter whole leading screws at Ф 10～Ф 100.
Detection method simple in construction, installation cost is low, simple to operate, error in 0.001mm,
Individually image acquisition component can be arranged on the guide rail of lead screw machining equipment, it is achieved on-line measurement simultaneously.
Beneficial effects of the present invention:
Parts physical dimension measurement will be offered convenience by the present invention.
Main advantages of the present invention:
Using source of parallel light, telecentric lens can ensure that the External Shape image collected, the most not
It is distorted with distance.Measuring speed is fast.
Image procossing uses sub-pix calculate, obtain the measurement result of degree of precision.
May be mounted at on-line measurement on process equipment.
Accompanying drawing explanation
The exemplary embodiment of the present invention it is more fully described, the above and other side of the present invention by referring to accompanying drawing
Face and advantage will become the clearest, in the accompanying drawings:
Fig. 1 leading screw groove-section geometric parameter schematic diagram
Fig. 2 leading screw groove-section image
Fig. 3 the inventive method detection outfit of equipment structural representation
Fig. 4 image acquisition component of the present invention structural representation
In figure: 1, parallel LED illumination light source, 2, supporting plate, 3, monitor station lathe bed, 4, grating scale displacement transducer,
5, tested leading screw, 6, monitor station driving leading screw, 7, doubly telecentric camera lens, 8, turntable, 9, V-type supports
Ferrum, 10, area array CCD digital camera, 11, light source, lens bracket.
Detailed description of the invention
Hereinafter, it is more fully described the present invention, various enforcements shown in the drawings now with reference to accompanying drawing
Example.But, the present invention can implement in many different forms, and should not be construed as limited to explain at this
The embodiment stated.On the contrary, it is provided that these embodiments make the disclosure will be thoroughly and completely, and by the present invention
Scope be fully conveyed to those skilled in the art.
Hereinafter, the exemplary embodiment of the present invention it is more fully described with reference to the accompanying drawings.
Embodiment 1
Leading screw groove-section physical dimension is measured, and installs leading screw and props up in iron brace in V-type, turns by leading screw lead angle
Dynamic turntable, makes the normal parallel (Fig. 3) of light source and lens axis with threads of lead screw raceway profile, and will treat
Survey groove-section and be placed in position, optical center, set camera gain and aperture time, gather image, obtain leading screw
Raceway normal section gray-scale image (Fig. 2).
Leading screw raceway physical dimension calculates, and extracts leading screw raceway contour edge in image, finds arc section edge,
Calculate two circular arc whole pixel centers of circle of the right and left, with two centers of circle obtained, calculate two terminal circle segmental arc respectively sub-
Pixel edge, further according to two centers of circle of sub-pixel edge correction, obtains the sub-pixel center of circle of the right and left circular arc.
By geometrical calculation, obtain leading screw groove-section physical dimension parameter (Fig. 1).
Embodiment 2
Leading screw total length pitch measurement, first adjusts image acquisition component also by groove-section geometric parameter detection method
Gather image, drive image acquisition component to move along guide rail with the leading screw on monitor station afterwards, use grating scale displacement
Sensor record lens displacement size, moves on to optical center next group groove-section center, gathers image.
By the image collected for twice, calculate two groove-section geometric parameters respectively, then use grating scale displacement sensing
The displacement scale that device obtains, calculates leading screw total length each several part pitch.
The foregoing is only embodiments of the invention, be not limited to the present invention.The present invention can have respectively
Plant suitably change and change.All made within the spirit and principles in the present invention any amendment, equivalent,
Improve, should be included within the scope of the present invention.
Claims (4)
1. a leading screw dimensional parameters detection equipment, it is characterised in that:
Described equipment includes monitor station lathe bed and the image acquisition component being arranged on lathe bed, and the bracket that described image acquisition component can be rotated on a spinstand by turntable, installation, the parallel LED illumination light source being fixed on bracket, doubly telecentric camera lens, area array CCD digital gray scale camera form；Described monitor station lathe bed includes lathe bed, turn-screw, grating scale displacement transducer and supports v block；
In image acquisition component, parallel lighting source and telecentric lens are coaxially mounted on bracket；Bracket is installed on a spinstand, it is desirable to lens axis object distance position overlaps with turntable center of rotation；
Image acquisition component is arranged on monitor station lathe bed rail plate, can be driven by lathe bed leading screw and move horizontally along guide rail, in grating scale displacement transducer, grating is arranged on lathe bed and guide rail parallel, grating reading head is arranged in image acquisition component, it is used for determining its displacement, tested leading screw is arranged on test desk and supports on V-type support, and tested leading screw is parallel with bed ways.
2. the leading screw dimensional parameters detection method using the described equipment of claim 1, it is characterised in that the method comprises the steps:
(1) illuminating by source of parallel light, doubly telecentric camera lens, area array CCD digital camera gathers leading screw raceway section of outline image；
(2) profile sub-pixel edge is extracted with image processing software；
(3) groove-section geometric parameter is calculated.
3. method as claimed in claim 2, it is characterised in that:
The detection process of described image acquisition and geometric parameter is as follows:
During detection leading screw groove-section geometric parameter, first leading screw is placed on V-type support, adjusts turntable, make the lens axis with leading screw axis angle γ to be measured be
γ=90 °-β
β is leading screw lead angle；
Adjust lens axis position by lathe bed leading screw, make lens axis be positioned at leading screw groove-section immediate vicinity；
Illumination intensity, camera gain and aperture time are set, with collected by camera raceway profile gray level image；
With image processing software the leading screw contour images collected is processed, computing, obtain corresponding geometric parameter.
4. method as claimed in claim 3, it is characterised in that:
During measurement, telecentric lens and corresponding parallel lighting source can be changed according to tested leading screw diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410310800.3A CN104132612B (en) | 2014-07-01 | 2014-07-01 | A kind of leading screw dimensional parameters detection method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410310800.3A CN104132612B (en) | 2014-07-01 | 2014-07-01 | A kind of leading screw dimensional parameters detection method and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104132612A CN104132612A (en) | 2014-11-05 |
| CN104132612B true CN104132612B (en) | 2017-01-04 |
Family
ID=51805387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410310800.3A Expired - Fee Related CN104132612B (en) | 2014-07-01 | 2014-07-01 | A kind of leading screw dimensional parameters detection method and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104132612B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207682A (en) * | 2020-01-15 | 2020-05-29 | 山东大学 | Trapezoidal lead screw parameter automatic measuring device and method based on machine vision |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716528A (en) * | 2016-05-09 | 2016-06-29 | 西安捷创测控技术有限公司 | Oil pipe thread size parameter detection method and device |
| CN108020159B (en) * | 2017-11-27 | 2023-08-15 | 武汉科技大学 | Shaft part size image acquisition device based on machine vision |
| CN111638215A (en) * | 2020-06-04 | 2020-09-08 | 苏州乐佰图信息技术有限公司 | Image acquisition device based on telecentric lens |
| CN114234800A (en) * | 2021-12-01 | 2022-03-25 | 北京航天石化技术装备工程有限公司 | Corrugated plate geometric dimension detection device and detection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201364140Y (en) * | 2009-03-06 | 2009-12-16 | 上海市激光技术研究所 | Micro-imaging high-precision three-dimensional detection device |
| CN101666620A (en) * | 2009-09-27 | 2010-03-10 | 合肥工业大学 | Multi-source parallel confocal micro detection system |
| CN102636494A (en) * | 2012-03-31 | 2012-08-15 | 苏州千兆自动化科技有限公司 | Vision detection system and detection method |
| CN103217441A (en) * | 2012-01-19 | 2013-07-24 | 昆山思拓机器有限公司 | Medical support detection device |
| CN103245296A (en) * | 2013-04-25 | 2013-08-14 | 北方民族大学 | Screw thread parameter measurement method based on image measurement and processing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004046772A (en) * | 2002-05-13 | 2004-02-12 | 3D Media Co Ltd | Method, system and apparatus for processing image |
-
2014
- 2014-07-01 CN CN201410310800.3A patent/CN104132612B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201364140Y (en) * | 2009-03-06 | 2009-12-16 | 上海市激光技术研究所 | Micro-imaging high-precision three-dimensional detection device |
| CN101666620A (en) * | 2009-09-27 | 2010-03-10 | 合肥工业大学 | Multi-source parallel confocal micro detection system |
| CN103217441A (en) * | 2012-01-19 | 2013-07-24 | 昆山思拓机器有限公司 | Medical support detection device |
| CN102636494A (en) * | 2012-03-31 | 2012-08-15 | 苏州千兆自动化科技有限公司 | Vision detection system and detection method |
| CN103245296A (en) * | 2013-04-25 | 2013-08-14 | 北方民族大学 | Screw thread parameter measurement method based on image measurement and processing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207682A (en) * | 2020-01-15 | 2020-05-29 | 山东大学 | Trapezoidal lead screw parameter automatic measuring device and method based on machine vision |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104132612A (en) | 2014-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104132612B (en) | A kind of leading screw dimensional parameters detection method and equipment | |
| CN106767565B (en) | One kind being used for brake block steel back plate plane degree automatic detection device and detection method | |
| CN206056522U (en) | A kind of contactless cylinder part inside/outside diameter size and form and position error measurement device | |
| US11199395B2 (en) | Profile inspection system for threaded and axial components | |
| CN100335860C (en) | Workpiece inspection method | |
| US8520066B2 (en) | Automated optical inspection system for the runout tolerance of circular saw blades | |
| CN102519400B (en) | Large slenderness ratio shaft part straightness error detection method based on machine vision | |
| CN103424088B (en) | A kind of chamfering measuring instrument | |
| CN101266137A (en) | Axis external diameter length detection process and device | |
| US20110085177A1 (en) | Offset amount calibrating method and surface profile measuring machine | |
| CN110645911A (en) | Device and method for obtaining complete outer surface 3D contour through rotary scanning | |
| CN105444673A (en) | Device and method for determining center of optical element according to rotating translation absolute detection method | |
| CN112815866A (en) | Internal thread detector based on laser profile scanning and detection method thereof | |
| Che et al. | Real-time monitoring of workpiece diameter during turning by vision method | |
| TWI636232B (en) | Non-contact and optical measuring automation system for the surface roughness value of disk cams and method thereof | |
| CN104215171A (en) | Noncontact laser ray measuring method for internal threads | |
| CN108709509B (en) | Contour camera, matched oversized-diameter revolving body workpiece non-contact caliper and non-contact revolving body measuring method | |
| JP2018205011A (en) | Screw shape measurement device and method | |
| CN115289997B (en) | Binocular camera three-dimensional contour scanner and application method thereof | |
| CN103557790B (en) | Raster image compound method for automatic measurement | |
| CN110986792A (en) | High-precision detection device and detection method for one-dimensional ball or cone nest array | |
| Gapinski et al. | Comparison of different coordinate measuring devices for part geometry control | |
| TWI693374B (en) | Non-contact measurement system for measuring object contour | |
| CN104061897A (en) | Large split type nut column coplanarity detection method | |
| Zhao et al. | Automatic laser interferometer and vision measurement system for stripe rod calibration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Niu Haijun Inventor after: Yang Nana Inventor after: Lei Jie Inventor after: Wang Ankang Inventor before: Niu Haijun Inventor before: Lei Jie Inventor before: Wang Ankang |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20170701 |