CN105890527A - Automatic device capable of realizing wall thickness deviation measurement of steel tube - Google Patents
Automatic device capable of realizing wall thickness deviation measurement of steel tube Download PDFInfo
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- CN105890527A CN105890527A CN201410550513.XA CN201410550513A CN105890527A CN 105890527 A CN105890527 A CN 105890527A CN 201410550513 A CN201410550513 A CN 201410550513A CN 105890527 A CN105890527 A CN 105890527A
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- wall thickness
- steel tube
- steel pipe
- inner ring
- tube section
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Abstract
The invention relates to the field of wall thickness measurement for annular section materials such as steel tubes, particularly relates to an automatic device cable of realizing wall thickness deviation measurement of a steel tube, and solves a problem that wall thickness measurement at present is low in efficiency and complex in operation. According to steel tube cross section picture acquired before software processing, an effective graphic area of the picture is intercepted and guided into a designed automation program so as to realize acquisition of wall thickness deviation data of the steel tube, and a wall thickness deviation curve is fitted; and mathematical morphology related operations are carried out on image information, an inner ring contour of the steel tube is acquired, and inner ring roundness evaluation is carried out. The automatic device provided by the invention can fit the wall thickness deviation of the steel tube automatically and evaluate the unevenness degree of the steel tube wall thickness, the measurement efficiency is high, and the operation is simple.
Description
Technical field
The present invention relates to the automaton that a kind of wall thickness deviation realizing the annular section bars such as steel pipe is measured.
Background technology
The wall thickness deviation of annular section bar is measured, and is widely used in the industrial departments such as oil, shipbuilding, water power, chemical industry, machine-building.The automaton that application is introduced herein, to measure steel pipe annular wall thickness deviation, can reduce measurement cost, reduces measurement time and workload, and meets higher required precision.At present, thickness of steel pipe measurement has general measuring method and the special instrument measured, the measuring method of conventional thickness of steel pipe is to utilize measurer repeated measurement the record of slide calliper rule, the human resources that this measuring method spends is big and certainty of measurement is the highest, is unsuitable for the main trend of current Steel Tube Industry automatization；And apply special measuring instrument, and utilize ultrasound wave, electromagnetic principle to make, such as pipeline wall thickness measuring instrument, this measurement equipment price is high and operation requires height.This thickness of steel pipe deviation measurement device step is: first obtain steel tube section figure with scanner or camera scans steel tube section, image procossing is carried out again on software, obtain wall thickness change data, and obtain inner circle maximum inscribed circle data, finally carry out demarcating and analytical data.
Summary of the invention
In order to overcome disadvantages mentioned above, it is an object of the invention to provide a kind of automaton that can realize the measurement of thickness of steel pipe deviation, solve the problem that in prior art, wall thickness measuring operation is complicated, improve measurement efficiency.
The technical scheme is that
A kind of operation realizing the automaton that thickness of steel pipe deviation is measured, comprises the steps:
1) according to the rough diameter of steel pipe, appropriate pixels and the scanner of size or photographing unit are selected；
2) shooting angle of the above-mentioned instrument of coarse adjustment, for strengthening the background contrasted when need to adjust shooting, obtains the sectional view of steel pipe；
3) sectional view obtained is imported program processing apparatus；
4) by steel tube section image gray processing and obtain its profile binary image array data；
5) utilize morphology processing, obtain outer ring contour pixel array and the inner ring contour pixel array of steel tube section；
6) software program of the photo application present invention design obtained for device processes, and gathers the data point on steel tube section profile every certain angle, thus obtains wall thickness deviation data, carries out wall thickness numerical fitting and obtain wall thickness deviation curve；
7) program finally applying the present invention carries out roundness evaluation to the inner ring of mandrel mill-rolled steel pipe.
Described step 2) in, during shooting steel tube section, filming apparatus should be made the most vertical and cross section.
Described step 3) in, if region shared by steel tube section figure is little in the picture captured by this device, then with it is proposed that software program steel tube section figure is intercepted out, with improve analyze accuracy and save software processes calculate the time.
Described step 4) in, utilize the detection of Image Edge-Detection canny operator to obtain the profile of gray level image.
Described step 5) in, utilizing the corrosion in mathematical morphology and expansion, operation and closed operation are opened in morphology, remove noise in image signal and realize image thinning, thus extract inner ring and the outer ring wire-frame image sketch map of steel tube section respectively.
Described step 6) in, carrying out unit demarcation, the wall thickness measured by steel tube section figure or diameter information are reflected as real wall thickness or diameter.
Described step 7) in, owing to mandrel mill-rolled steel pipe inner ring is usually polygonal shape, the present invention can utilize program to obtain the maximum inscribed circle of inner ring profile and the diameter of minimum circumscribed circle, thus realizes the roundness evaluation of steel pipe inner ring.
The invention has the beneficial effects as follows:
1, use the present invention so that wall thickness measuring is more transferred to software processes from hardware requirement height, thus improves production automation rate, and certainty of measurement reaches certain requirement, thickness of steel pipe has been carried out numerical fitting and evaluation steel pipe inner ring circularity.
2, the present invention is simple to operate, and the data obtained can be with automatic business processing, and efficiency is high.
Accompanying drawing explanation
Fig. 1 is thickness of steel pipe self-operated measuring unit schematic diagram.
Fig. 2 is a steel tube section boundary profile figure.
Fig. 3 is a steel pipe inner ring profile and its inscribed circle schematic diagram.
Detailed description of the invention
The detailed description of the invention of the present invention is described below in conjunction with accompanying drawing.
Device schematic diagram designed by the present invention shown in Fig. 1, it includes steel pipe, filming apparatus and 3 parts of program processing apparatus.
Illustrate with the steel tube section figure obtained after a scanning, the steel pipe profile diagram after the process of the present invention shown in Fig. 2.Original image useful information region is intercepted, by image binaryzation, sharpen, remove picture noise, " canny " operator of edge function obtains image outline figure again, its pixel data storage is presented as that Large sparse matrix, taking-up great circle pixel coordinate are made its Least Square Circle and obtained its central coordinate of circle.Centered by the center of circle of great circle, record one group of wall thickness value every certain angle, the overall trend graph of wall thickness value change can be simulated with numerical analysis method.
Fig. 3 show schematic diagram used during steel pipe inner ring roundness evaluation.Steel tube section figure, after mathematical morphology operates, can obtain the steel pipe inner ring contour pixel matrix value after removing noise, and the program of application present invention design obtains the minimum inscribed circle of inner ring, such that it is able to check the circularity of inner ring.
Result shows, present invention achieves the measurement of the wall thickness deviation of the section bars such as steel pipe, measures simple, and the deviation value shape drawn with actual value after matching is basically identical, measures efficiency high.
Claims (2)
1. the automaton that the wall thickness deviation realizing the annular section bars such as steel pipe is measured, it is characterised in that
Comprise the steps:
1) according to the rough diameter of the annular section bar such as steel pipe, select appropriate pixels and the scanner of size or
Photographing unit；
2) shooting angle of the above-mentioned instrument of coarse adjustment, for strengthening the background contrasted when need to adjust shooting,
Sectional view to steel pipe；
3) sectional view obtained is imported program processing apparatus:
4) by steel tube section image gray processing and obtain its profile binary image array data；
5) utilize mathematical morphology, obtain outer ring contour pixel array and the inner ring contour pixel of steel tube section
Array；
6) software program of photo application present invention design is processed, gather steel pipe every certain angle
Data point on cross section profile, thus obtain wall thickness deviation data, carrying out wall thickness numerical fitting, to obtain wall thickness inclined
Difference curve；
7) mandrel mill-rolled steel pipe wall unevenness degree is evaluated by the program finally applying the present invention.
2. the automaton that the wall thickness deviation of the section bar such as steel pipe as claimed in claim 1 is measured, its feature
It is: described step 2) in, during shooting steel tube section, filming apparatus should be made the most vertical and cross section.
Described step 3) in, if region shared by steel tube section figure is little in picture, then with it is proposed that soft
Part program intercepts out steel tube section figure, during to improve the accuracy analyzed and to save software processes calculating
Between.
Described step 4) in, utilize the detection of image procossing canny operator to obtain the profile of gray level image.
Described step 5) in, utilizing the corrosion in mathematical morphology and expansion, morphology is opened operation and closes behaviour
Make, remove noise in image signal and realize image thinning, thus extract respectively the inner ring of steel tube section with
Outer ring wire-frame image sketch map.
Described step 6) in, carry out unit demarcation, the wall thickness measured by steel tube section figure or diameter letter
Breath is reflected as real wall thickness or diameter.
Described step 7) in, owing to mandrel mill-rolled steel pipe inner ring is usually polygonal shape, the present invention can utilize
Program obtains the maximum inscribed circle of inner ring profile and the diameter of minimum circumscribed circle, thus realizes the circle of steel pipe inner ring
Degree evaluation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410550513.XA CN105890527A (en) | 2014-10-17 | 2014-10-17 | Automatic device capable of realizing wall thickness deviation measurement of steel tube |
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| CN201410550513.XA CN105890527A (en) | 2014-10-17 | 2014-10-17 | Automatic device capable of realizing wall thickness deviation measurement of steel tube |
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| CN105890527A true CN105890527A (en) | 2016-08-24 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151808A (en) * | 2018-01-09 | 2018-06-12 | 湖北汽车工业学院 | A kind of steel pipe measuring device and method based on image procossing |
| CN108145344A (en) * | 2018-02-02 | 2018-06-12 | 中科和光（天津）应用激光技术研究所有限公司 | Contactless welding-rod eccentricity value detection device and method |
| CN108759664A (en) * | 2018-05-22 | 2018-11-06 | 湖南瑞智健科技有限公司 | A kind of nuclear fuel rod size detecting method and system based on telecentric optics |
| CN109458929A (en) * | 2018-12-18 | 2019-03-12 | 中国人民解放军陆军工程大学 | A kind of cylinder measure field fast calibration device and method |
| CN110307801A (en) * | 2019-06-10 | 2019-10-08 | 洛阳理工学院 | A kind of out-of-roundness detection method of big diameter elbow nozzle |
| CN110631491A (en) * | 2019-09-12 | 2019-12-31 | 广州海狮软件科技有限公司 | Pipe measuring and calibrating method |
| CN110956659A (en) * | 2019-11-29 | 2020-04-03 | 航天特种材料及工艺技术研究所 | Industrial CT-based rapid measuring method for wall thickness of annular cross section |
| CN111006597A (en) * | 2019-11-13 | 2020-04-14 | 北京航星机器制造有限公司 | Thin-wall cylinder wall thickness measuring system and wall thickness uniformity judging method |
| CN112161570A (en) * | 2020-09-30 | 2021-01-01 | 安徽赛安安全设备有限责任公司 | I-shaped pipe fitting detection mechanism based on photoelectric sensing |
| CN113029011A (en) * | 2021-03-19 | 2021-06-25 | 广州海狮软件科技有限公司 | Calibration method and calibration device for measuring thickness of pipe wall of pipe |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151808A (en) * | 2018-01-09 | 2018-06-12 | 湖北汽车工业学院 | A kind of steel pipe measuring device and method based on image procossing |
| CN108151808B (en) * | 2018-01-09 | 2019-10-08 | 湖北汽车工业学院 | A kind of steel pipe measuring device and method based on image procossing |
| CN108145344A (en) * | 2018-02-02 | 2018-06-12 | 中科和光（天津）应用激光技术研究所有限公司 | Contactless welding-rod eccentricity value detection device and method |
| CN108759664A (en) * | 2018-05-22 | 2018-11-06 | 湖南瑞智健科技有限公司 | A kind of nuclear fuel rod size detecting method and system based on telecentric optics |
| CN108759664B (en) * | 2018-05-22 | 2021-06-08 | 湖南瑞智健科技有限公司 | Nuclear fuel rod size detection method and system based on telecentric optics |
| CN109458929A (en) * | 2018-12-18 | 2019-03-12 | 中国人民解放军陆军工程大学 | A kind of cylinder measure field fast calibration device and method |
| CN110307801B (en) * | 2019-06-10 | 2020-12-01 | 洛阳理工学院 | Method for detecting out-of-roundness of large-diameter elbow pipe opening |
| CN110307801A (en) * | 2019-06-10 | 2019-10-08 | 洛阳理工学院 | A kind of out-of-roundness detection method of big diameter elbow nozzle |
| CN110631491A (en) * | 2019-09-12 | 2019-12-31 | 广州海狮软件科技有限公司 | Pipe measuring and calibrating method |
| CN111006597A (en) * | 2019-11-13 | 2020-04-14 | 北京航星机器制造有限公司 | Thin-wall cylinder wall thickness measuring system and wall thickness uniformity judging method |
| CN111006597B (en) * | 2019-11-13 | 2021-06-11 | 北京航星机器制造有限公司 | Thin-wall cylinder wall thickness measuring system and wall thickness uniformity judging method |
| CN110956659A (en) * | 2019-11-29 | 2020-04-03 | 航天特种材料及工艺技术研究所 | Industrial CT-based rapid measuring method for wall thickness of annular cross section |
| CN112161570A (en) * | 2020-09-30 | 2021-01-01 | 安徽赛安安全设备有限责任公司 | I-shaped pipe fitting detection mechanism based on photoelectric sensing |
| CN113029011A (en) * | 2021-03-19 | 2021-06-25 | 广州海狮软件科技有限公司 | Calibration method and calibration device for measuring thickness of pipe wall of pipe |
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