CN101995218A - Image type screw thread template automatic detection instrument - Google Patents
Image type screw thread template automatic detection instrument Download PDFInfo
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- CN101995218A CN101995218A CN 201010523879 CN201010523879A CN101995218A CN 101995218 A CN101995218 A CN 101995218A CN 201010523879 CN201010523879 CN 201010523879 CN 201010523879 A CN201010523879 A CN 201010523879A CN 101995218 A CN101995218 A CN 101995218A
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Abstract
The invention provides an image type screw thread template automatic detection instrument which uses a three-shaft CNC (Computerized Numerical Control) travelling table as a main body and is also equipped with a microscope, a CCD (Charge Coupled Device), a lighting system, an electric control card and a personal computer. The three-shaft CNC travelling table is driven by the electric control card under the control of the personal computer to realize program control; the personal computer is equipped with an image acquisition card and used for receiving screw thread template image data captured by an optical imaging system consisting of the microscope and the CCD; in addition, a full-automatic screw thread template detection module is provided in the personal computer and comprises a screw thread template search module and a screw thread parameter measurement module, wherein the screw thread template search module searches screw thread template measurement area position and rotation angle, the screw thread parameter measurement module completes the measurement and calculation of thread pitch, thread angle, crest width, root width and other data inside the measurement area, and the two modules work alternately till all screw thread templates are detected.
Description
Technical field
The present invention is a kind of full-automatic instrument that adopts the optical image mode to carry out thread profile gauge calibrating, can be automatically thread profile gauge be in groups examined and determine fast, and is directly generated probation redport.
Background technology
Equipment such as tool microscope are adopted in present thread profile gauge calibrating usually, finish with manual mode of operation.One group of thread profile gauge has nearly, and 20 model needs calibrating, each model need rely on manual mode of operation, it is clear that every thread profile gauge is focused on one by one, and repeatedly align, pitch, crest width, tooth bottom width degree, half of thread angle are measured one by one, workload is heavy, inefficiency, calibrating data objectivity are poor, has brought very big difficulty for calibrating department.
In document in recent years, do not see report relevant for thread profile gauge automatic Verification equipment.
Summary of the invention
The structure of image-type thread profile gauge automatic calibrating instrument comprises: three travelling tables of XYZ [1], microscope [2], CCD, illuminator [3], electrical control card [4] and personal computer [5]; Personal computer [5] is equipped with image pick-up card, receives the view data by microscope [2] and optical imaging system that CCD constitutes; Personal computer [5] comprises the thread profile gauge assay module, and it utilizes image processing techniques, and the view data of obtaining is handled, and finishes the calibrating of three travelling tables of XYZ [1] being gone up thread profile gauge [6]; Personal computer [5] comes three travelling tables of mobile XYZ [1] by send order to the electrical control card, makes that zone to be measured moves in the microscopical viewing area on the thread profile gauge; Illuminator [3] guarantees that optical imaging system gets access to high-quality thread profile gauge view data.Fig. 1 has provided one-piece construction synoptic diagram of the present invention.
An object of the present invention is to provide a kind of high precision, can programme controlled three mobile working platforms.Move by the control of the thread profile gauge assay module in the personal computer [5] platform, thread profile gauge zone to be measured is moved in the field of microscope one by one the scanning work of the thread profile gauge in groups that order is finished.
Another object of the present invention is that a kind of full automatic thread profile gauge assay module is provided in personal computer, after this module only needs the operator to do a spot of setting, can full automaticly finish the calibrating of thread profile gauge in groups.The thread profile gauge assay module is divided into thread profile gauge search module and thread parameter measurement module again.
During the calibrating thread profile gauge, the operator only need launch all models tilings on the thread profile gauge in groups, be fixed on the measuring table, start assay module, the outer ledge of choosing the highest a slice thread profile gauge in this group model is as the calibrating reference position, module arc extraction module is handled the image that image pick-up card in the personal computer obtains, calculate the edge point set of high thread profile gauge, if necessary, drive three working table movement, to detect, finish the extraction of the highest thread profile gauge edge point set when the outer model zone of forward view.
Thread profile gauge search module internal record standard thread model correlation parameter: parameters such as the pitch of each specification thread profile gauge, crest width, tooth bottom width degree, screw thread effective length also comprise the outline data of each specification thread profile gauge simultaneously.The thread profile gauge search module at first calls the thread profile gauge outline data that prestores when work, the thread profile gauge edge point set that extracts is mated, and determines the position and the anglec of rotation of current thread profile gauge measured zone.After the thread profile gauge search module was determined measured zone, instrument called the thread parameter measurement module again, finished the measurement of data such as pitch, tooth form angle, crest width, tooth bottom width degree in measured zone inside and calculated.
After finishing the calibrating of a slice thread profile gauge, the thread profile gauge search module is according to current calibrating thread profile gauge marginal position and height, and the tendency of edge point set, dope down the position of a slice thread profile gauge, control three travelling tables and move to this position, automatic focus begins the calibrating of new a slice thread profile gauge.
The thread profile gauge assay module repeats above process automatically, and up to finishing all thread profile gauge calibratings, last directly the printing generates the required calibration certificate of calibrating department.
The invention has the advantages that calibrating efficient height, greatly reduce the workload of calibrating department.Simultaneously, the present invention examines and determine the objectivity and the high conformity of data, and it is very little influenced by human factor.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention.
Fig. 2 is the workflow synoptic diagram of full-automatic thread profile gauge calibrating of the present invention.
Fig. 3 is the work synoptic diagram of thread parameter measurement module of the present invention.
Fig. 4 is that thread parameter of the present invention calculates synoptic diagram.
Primary structure is among the figure: the district is extracted in three travelling tables of 1-XYZ, 2-microscope, 3-illuminator, 4-electrical control card, 5-personal computer, the tested thread profile gauge of 6-, 7-thread profile gauge measurement range, 8-parameter measurement.
Embodiment
The thread profile gauge assay module is divided into thread profile gauge search module and thread parameter measurement module again.The thread profile gauge search module is realized the automatic search to tested model, and obtains screw thread perform region on this sheet model.The thread parameter measurement module is calculated thread parameter automatically in the zone that the thread profile gauge search module provides.After finishing the calibrating of a slice thread profile gauge, the prediction of thread profile gauge search module is the position of a slice thread profile gauge down, controls three travelling tables and moves to this position, and automatic focus begins the calibrating of a slice thread profile gauge down, and schematic flow sheet is seen shown in Figure 2.After finishing calibrating, the thread profile gauge assay module is the probation redport of output standard directly.
The thread profile gauge assay module related data of standard thread model in groups that prestored: parameters such as the pitch of each specification thread profile gauge, crest width, tooth bottom width degree and screw thread effective length also comprise the outline data of each specification thread profile gauge simultaneously.Module has guaranteed the reliability of calibrating with the foundation of these data as automatic Verification.
In order to improve calibrating efficient, before using the thread profile gauge assay module, need the operator that thread profile gauge is in groups evenly spread out, make every thread profile gauge effective thread length areas not be blocked, place it on the calibrating instrument work top, use the anchor clamps fixation; And camera lens moved to the exterior lateral area of the highest a slice thread profile gauge, it is clear to focus on.
Thread profile gauge assay module overall work flow process:
1. thread profile gauge automatic Verification module invokes thread profile gauge search module begins the model search;
2. the thread profile gauge search module obtains the profile point set data of current calibrating model;
3. the thread profile gauge search module is written into the outline data of the model of the standard thread in groups parameter that prestores and each specification thread profile gauge, and the thread profile gauge edge point set that extracts is mated, and determines the position and the anglec of rotation of current thread profile gauge measured zone;
4. the thread profile gauge assay module is called the thread parameter measurement module according to the measured zone that the thread profile gauge search module obtains, and finishes the measurements and calculations of data such as pitch, tooth form angle, crest width, tooth bottom width degree in measured zone;
5. the thread profile gauge assay module is according to the tendency and the height of current calibrating model, and mobile machine console arrives a slice model zone down automatically;
6. the thread profile gauge assay module repeat 2.～5., up to the measurement of finishing these all thread parameters of group model;
7. the thread profile gauge assay module compares with the measured value and the standard value of every thread profile gauge, judges whether assay approval of each sheet model, exports detailed probation redport.
The thread profile gauge search module is realized the automatic search to tested model, and obtains screw thread perform region on this sheet model, and concrete workflow is as follows:
1. the thread profile gauge search module obtains ccd image from image pick-up card;
2. the thread profile gauge search module uses the gaussian filtering algorithm that the view data of gathering is carried out filtering;
3. the thread profile gauge search module adopts the Sobel operator to carry out rim detection, obtains the edge point set of current imagery zone;
4. the thread profile gauge search module thread profile gauge outline data that will be kept at inside modules and all edge point sets that extracted mate, and obtain the matching degree index;
5. the thread profile gauge search module is controlled three workbenches move to thread profile gauge according to the tendency at edge next zone according to extracting the tendency that the edge point set is judged the edge;
6. the thread profile gauge search module mates once more, obtains new matching degree index;
7. the thread profile gauge search module is judged double matching degree data, if matching degree increases, then repeats 5.～6., proceed search, coupling; If matching degree reduces, then will arrive the edge point set that obtains till last circulation goes on foot measurement range as this sheet thread profile gauge;
8. the thread profile gauge search module mates once more with edge point set in the measurement range and the inner edge point set of preserving, and obtains the rotation amount and the translational movement of this measurement range;
9. the thread profile gauge search module is output with the rotation amount and the translational movement of edge point set, measurement range, measurement range, finishes the search work of this sheet model.
After the measured zone of finishing a slice thread profile gauge was extracted, thread profile gauge assay module call parameters measurement module was finished the measurement of screw thread correlation parameter in measured zone.The concrete workflow of parameter measurement module is as follows:
1. parameter measurement module is written into the inner measurement parameter of preserving, and the district is extracted in the measurement of each parameter correspondence, each is measured and extracts the relative position of district in measurement range;
2. parameter measurement module is a parameter with the rotation amount and the translational movement data of measurement range, and measurement range and edge point set are proofreaied and correct, and it is adjusted to the direction of inner template;
3. parameter measurement module measure to be extracted each of inside in the point set data after district is applied to correction, marks off the measurement point set of each parameter correspondence to be measured, as shown in Figure 3;
4. parameter measurement module is used least square method, and each parameter point set data to be measured is carried out match, obtains the line segment or the circular arc data of needs, calculates each measurement parameter thus, finishes the calibrating of a slice thread profile gauge, as shown in Figure 4.
Claims (4)
1. image-type thread profile gauge automatic calibrating instrument, be made up of three CNC travelling tables [1], microscope [2], CCD, illuminator [3], electrical control card [4], personal computer [5], it is characterized in that: each axle of described three CNC travelling tables [1] is made up of line slideway, leading screw and DC servo control system; Described personal computer [5] has full-automatic thread profile gauge assay module.
2. image-type thread profile gauge automatic calibrating instrument as claimed in claim 1, described full-automatic thread profile gauge assay module comprises thread profile gauge search module and thread parameter measurement module; The thread profile gauge search module is the tested model of search automatically, and obtains screw thread perform region on this sheet model; The thread parameter measurement module is calculated thread parameter automatically in the zone that the thread profile gauge search module provides; Two module alternations are finished up to all thread profile gauge calibratings.
3. image-type thread profile gauge automatic calibrating instrument as claimed in claim 2, described thread profile gauge search module obtains ccd image from image pick-up card, use the gaussian filtering algorithm that view data is carried out filtering, adopt the Sobel operator to carry out rim detection, obtain the edge point set of current imagery zone, the thread profile gauge outline data that use is kept at inside modules mates with all edge point sets that obtained, obtain the matching degree index, judge the tendency at edge according to extracting the edge point set, control three workbenches move to thread profile gauge according to the tendency at edge next zone, detect once more and mate, obtain new matching degree index, if matching degree increases, then proceed search; If matching degree reduces, then will arrive the edge point set that obtained till the last circulation measurement range, and calculate the rotation amount and the translational movement of measurement range as this sheet thread profile gauge.
4. image-type thread profile gauge automatic calibrating instrument as claimed in claim 2, described thread parameter measurement module are written into the inner measurement parameter of preserving, and the district is extracted in the measurement of each parameter correspondence, each is measured and extracts the relative position of district in measurement range; Rotation amount and translational movement data with measurement range are parameter, and measurement range and edge point set are proofreaied and correct, and it is adjusted to the direction of inner template; Each of inside measure extracted in the point set data after the district is applied to correction, mark off the measurement point set of each parameter correspondence to be measured, re-use least square method, each parameter point set data to be measured is carried out match, obtain the line segment or the circular arc data of needs, calculate each measurement parameter thus, finish the measurement of a slice panel beating model.
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| CN201010523879XA CN101995218B (en) | 2010-10-29 | 2010-10-29 | Image type screw thread template automatic detection instrument |
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| CN201010523879XA CN101995218B (en) | 2010-10-29 | 2010-10-29 | Image type screw thread template automatic detection instrument |
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| CN101995218A true CN101995218A (en) | 2011-03-30 |
| CN101995218B CN101995218B (en) | 2012-07-04 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103438827A (en) * | 2013-08-19 | 2013-12-11 | 电子科技大学 | Method for detecting threaded area peak line of screw |
| CN105004275A (en) * | 2015-07-21 | 2015-10-28 | 苏州佳祺仕信息科技有限公司 | Threaded hole three-CCD camera detection mechanism |
| CN105987667A (en) * | 2015-02-10 | 2016-10-05 | 北京纳通科技集团有限公司 | Triangular thread tooth tip width measurement method and apparatus thereof |
| CN104024790B (en) * | 2011-12-27 | 2016-12-21 | 新日铁住金株式会社 | The end shape measuring method of threaded pipe |
| CN107202544A (en) * | 2017-07-31 | 2017-09-26 | 深圳市欧视达自动化设备有限公司 | The detection means and detection method of a kind of screw rod |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438801A (en) * | 2013-09-16 | 2013-12-11 | 苏州天准精密技术有限公司 | Mobile platform type image measuring equipment and method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104024790B (en) * | 2011-12-27 | 2016-12-21 | 新日铁住金株式会社 | The end shape measuring method of threaded pipe |
| US9557165B2 (en) | 2011-12-27 | 2017-01-31 | Nippon Steel & Sumitomo Metal Corporation | Method for measuring end portion shape of threaded pipe or tube |
| 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 |
| CN103438827A (en) * | 2013-08-19 | 2013-12-11 | 电子科技大学 | Method for detecting threaded area peak line of screw |
| CN103438827B (en) * | 2013-08-19 | 2016-01-13 | 电子科技大学 | The detection method of the threaded portion peak line of screw |
| CN105987667A (en) * | 2015-02-10 | 2016-10-05 | 北京纳通科技集团有限公司 | Triangular thread tooth tip width measurement method and apparatus thereof |
| CN105987667B (en) * | 2015-02-10 | 2018-10-02 | 北京纳通科技集团有限公司 | The wide measurement method of angular thread cusp and device |
| CN105004275A (en) * | 2015-07-21 | 2015-10-28 | 苏州佳祺仕信息科技有限公司 | Threaded hole three-CCD camera detection mechanism |
| CN107202544A (en) * | 2017-07-31 | 2017-09-26 | 深圳市欧视达自动化设备有限公司 | The detection means and detection method of a kind of screw rod |
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| CN101995218B (en) | 2012-07-04 |
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