CN102608124A - Micro-pipe internal flaw and appearance measurement device and method - Google Patents

Micro-pipe internal flaw and appearance measurement device and method Download PDF

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Publication number
CN102608124A
CN102608124A CN2012100994624A CN201210099462A CN102608124A CN 102608124 A CN102608124 A CN 102608124A CN 2012100994624 A CN2012100994624 A CN 2012100994624A CN 201210099462 A CN201210099462 A CN 201210099462A CN 102608124 A CN102608124 A CN 102608124A
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CN
China
Prior art keywords
defective
measurement
micro
pipe internal
deferent
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CN2012100994624A
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Chinese (zh)
Inventor
吴斌
薛婷
韩文强
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天津大学
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Priority to CN2012100994624A priority Critical patent/CN102608124A/en
Publication of CN102608124A publication Critical patent/CN102608124A/en

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Abstract

The invention relates to micro-pipe internal flaw measurement and optical measurement. The invention provides a micro-pipe internal flaw measurement and appearance measurement device and a method, having the performance characteristics of flexibility, automation, rapidness, online and the like, so as to meet the measurement requirements of modern industry on small size feature inner bore or micro-pipe internal flaw and appearance. For achieving the purposes, the invention adopts the technical scheme that: the micro-pipe internal flaw measurement and appearance measurement device comprises a micro-pipe internal flaw measurement and appearance measurement sensor, wherein the sensor consists of an optical transmission part, a lighting source and a camera; the sensor is fixedly connected with a tail end joint of an industrial robot; pipe internal 360-degree cylindrical surface annular panoramic picture data is transmitted by the optical transmission part, shot by the camera and is collected by an image acquisition card to be processed by a computer. The micro-pipe internal flaw measurement and appearance measurement device and the method are mainly applicable to micro-pipe internal flaw measurement.

Description

Defective and topography measurement device and method in the microcapillary deferent

Technical field

The present invention relates to defectoscopy, optical measurement in the microcapillary deferent, specifically relate to defective and topography measurement device and method in the microcapillary deferent.

Background technology

Along with advanced manufacturing industry and science and technology development; Microtubule or small size features endoporus are in Application for Field such as Aero-Space, automobile, the energy and metallurgy, chemical industry more and more widely; Pilot piping like aerospace flight vehicle heat radiation, airflow field; Automobile engine cylinder-body, cylinder cap and wheel box, the heat-exchange tube of nuclear reactor, steam generator, condenser, and a large amount of complex-shaped microtubule or small size features endoporus that all distributing in agitated reactor, the reaction tower in the Application in Chemical Engineering.In the hot investment casting process of above-mentioned parts or device; Because the existence of dust or air gap; Usually can produce some small defectives such as pit in the microtubule inner wall surface, also can have some small air chambers in the inside of microtubule sometimes, use through follow-up machine work or through long-term; Inner micro air chamber is exposed form small rut or defectives such as crackle, cut occur; Thereby cause the especially leakage of junction gases at high pressure or liquid of part interior, cause the reduction of equipment performance, even lead to security incident.Need measure defective and pattern in the microcapillary deferent for this reason; Qualification and security with to parts are estimated, this for the quality of enhancing product performance, cut the waste, avoid accident especially the generation of catastrophic failure all be of great practical significance.

At present, pipeline or hole inwall detection technique commonly used mainly contain leakage method, supercritical ultrasonics technology, eddy-current method, ring of light method of section, endoscope and ccd video camera IMAQ method.These methods are primarily aimed at pipeline or the characteristic endoporus detection of internal diameter size greater than 10mm, and less for the detection method of 10mm or smaller szie internal diameter feature holes or microtubule.Along with the development of photoelectric technology and Micrometer-Nanometer Processing Technology, the external diameter of industrial endoscope has narrowed down to 4mm, even littler, therefore can adopt industrial endoscope to detect characteristic endoporus or pipeline about 10mm.But adopt endoscope can only judge qualitatively whether inner surface of pipeline exists defectives such as flaw and crackle, and can not provide the size and the particular location of defective quantitatively, especially need operation manually, therefore have significant limitation in the application.In addition, also there are shortcomings such as precision is lower, detection speed is slow, automaticity is low in existing method for the detection of microtubule or hole wall, can not satisfy the actual production demand of flexibility, robotization, fast detecting.

Summary of the invention

The present invention is intended to solve the deficiency that overcomes prior art; Defective and topography measurement device and method in a kind of microcapillary deferent are provided; Have flexibility, automatically, fast, can be online etc. performance characteristics, to satisfy the measurement requirement of modern industry to defective and pattern in small size features endoporus or the microcapillary deferent.For achieving the above object; The technical scheme that the present invention takes is; Defective and topography measurement device in the microcapillary deferent; Form defective and topography measurement sensor in the microcapillary deferent by optical transmission component, lighting source, video camera, and connect, manage interior 360 ° of cylinder endless belt panoramic picture data and collect computing machine and handle through optical transmission component transmission, video camera shooting, image pick-up card with the terminal arthrodesis of industrial robot.

The optical transmission component top is provided with 360 ° of axicon lens, and optical transmission component can be advanced or retreats along microtubule.

Defective and topography measurement method in the microcapillary deferent realize by means of aforementioned means, and comprise the following steps:

(1) pipe under test is accurately located;

(2) industrial robot drives optical transmission component entering pipe under test one sectional position of survey sensor, and keeps the alignment of optical transmission component and pipe under test;

(3) open lighting source, and realize the collection of video camera output annular image data by the computer control image pick-up card;

(4) along the tested pipeline axial direction, repeating step (3) and step (4), the image data acquiring of Zone Full in the completion measured tube deferent;

(5) annular image that obtains is launched and the complete image of institute's gaging hole wall is formed in splicing; Adopt the Image Information Processing technology that it is handled; Carry out the structure of pattern in parameter measurement such as differentiation and defective locations, size and the pipe of defective, thereby realize defective and the topography measurement in the tested pipeline tube wall.

Technical characterstic of the present invention and effect:

The inventive method and device can be realized the measurement of interior defective of microcapillary deferent and pattern; This method is easy to operate, realization is simple; Flexibility with height; Have characteristics such as measuring speed is fast, measuring accuracy is high, automaticity height simultaneously, can satisfy in equipment such as Aero-Space, automobile, the energy or the parts requirement of defective and pattern on-line measurement in the microcapillary deferent.

Adopt external light source importing, internal image to derive new approaches; Lighting source and image acquisition device are placed on the pipe under test outside; Through optical transmission component with zone to be measured in the exterior lighting light ingress pipe; By same optical transmission component the optical imagery in zone to be measured is derived simultaneously; The combining image information processing technologies etc. realize noncontact, the measurement automatically of interior defective of microcapillary deferent and pattern, have broken through the built-in implementation pattern of sensor in interior defective of conventional tube deferent and the topography measurement method, can adapt to the measurement of defective in the littler microcapillary deferent of size; Simultaneously, reliably, the introducing of industrial robot technology has flexibly guaranteed the rapidity of measuring process and increasingly automated.The inventive method is easy to operate with device, realization is simple, precision is high, measuring speed is fast, automaticity is high, can apply.

Description of drawings

Fig. 1 is defective and a topography measurement sensor synoptic diagram in the microcapillary deferent;

Fig. 2 is a panoramic picture treatment scheme synoptic diagram in the pipe;

Fig. 3 is defective and a topography measurement device synoptic diagram in the microcapillary deferent.

Wherein:

1: tested pipeline 2: optical transmission component (containing 360 ° of panorama axicon lens)

3: external light source 4: video camera

5: industrial robot 6: survey sensor

7: measured workpiece.

Embodiment

The technical scheme that the present invention adopts is: break through the built-in traditional mode of sensor in interior defective of existing pipes deferent and the topography measurement method; External light source importing, internal image derivation new approaches are proposed; Lighting source and image acquisition device are placed on the pipe under test outside; Through optical transmission component with zone to be measured in the exterior lighting light ingress pipe; By same optical transmission component the optical imagery in zone to be measured is derived simultaneously, the combining image information processing technology etc. realize the noncontact of interior defective of microcapillary deferent and pattern, the automatic measurement; On this basis, industrial robot technology is introduced microtubule precision measurement application, for realizing that defective and topography measurement provide motion control and support platform in flexibility, quick, the online microcapillary deferent.Above technical scheme need be by means of industrial robot (like the IRB2400 of ABB AB type industrial robot), lighting source (like the PLI-28SR of Sight-Pipe company), optical transmission component (like the P/N of Sight-Pipe company 3198930), video camera (like Baumer company's T XG12), image pick-up card (like the MeteorII of Matrox company), computer realization, and further comprises the steps:

(1) forms defective and topography measurement sensor in the microcapillary deferent by optical transmission component, lighting source, video camera, and connect with the terminal arthrodesis of industrial robot.

(2) measured workpiece is accurately located.

(3) industrial robot drives optical transmission component entering pipe under test one sectional position of survey sensor, and keeps the alignment of optical transmission component and pipe under test.

(4) open lighting source, and realize the collection of video camera output annular image data by the computer control image pick-up card.

(5) along the tested pipeline axial direction, repeating step (3) and step (4), the image data acquiring of Zone Full in the completion measured tube deferent.

(6) annular image that obtains is launched and the complete image of institute's gaging hole wall is formed in splicing; Adopt the Image Information Processing technology that it is handled; Carry out the structure of pattern in parameter measurement such as differentiation and defective locations, size and the pipe of defective, thereby realize defective and the topography measurement in the tested pipeline tube wall.

Below in conjunction with the embodiment accompanying drawing defective and topography measurement apparatus and method in a kind of brand-new microcapillary deferent of the present invention are made detailed description.

Defective and topography measurement apparatus and method in a kind of microcapillary deferent of the present invention; Its unique distinction is: break through the built-in traditional mode of sensor in interior defective of existing pipes deferent and the topography measurement method; External light source importing, internal image derivation new approaches are proposed; Lighting source and image acquisition device are placed on the pipe under test outside;, by same optical transmission component the optical imagery in zone to be measured is derived simultaneously zone to be measured in the exterior lighting light ingress pipe through optical transmission component, the combining image information processing technology etc. realize the noncontact of interior defective of microcapillary deferent and pattern, the automatic measurement; On this basis, industrial robot technology is introduced microtubule precision measurement application, for realizing that defective and topography measurement provide motion control and support platform in flexibility, quick, the online microcapillary deferent.

Be illustrated in figure 1 as defective and topography measurement sensor synoptic diagram in the microcapillary deferent.Survey sensor (6) is made up of optical transmission component (containing 360 ° of panorama axicon lens) (2), external light source (3) and video camera (4).External light source (3) evenly is incident upon tested zone in the pipe through optical transmission component (2) with illumination light, and gathers 360 ° of cylinder endless belt of measured zone panoramic picture in the microcapillary deferent through optical transmission component (containing 360 ° of panorama axicon lens) (2) by video camera (4).

Be illustrated in figure 2 as panoramic picture treatment scheme synoptic diagram in the pipe.360 ° of axicon lens panoramic imageries are followed " circular cone conversion ", promptly axial same depth location place, and 360 ° of panorama pipe internal informations are corresponding to an annular region in the panoramic picture.360 ° of panoramic pictures in the pipe that collects by video camera (4); At first carrying out annular region divides; Then the annular region data pick-up is come out and launch, differentiate and pattern is rebuild, realize defective and topography measurement in the microcapillary deferent then through follow-up data splicing, defective.

Be illustrated in figure 3 as defective and topography measurement device synoptic diagram in the microcapillary deferent.This device mainly by industrial robot (5), survey sensor (6), and relevant communication control system, image capturing system, image processing system, defective judgement, measurement and pattern reconstructing system etc. form.Behind the accurate location of measured workpiece (7), the optical transmission component (2) that industrial robot (5) drives survey sensor (6) gets into pipe under test one sectional position, and keeps the alignment of optical transmission component (2) and pipe under test.Open external light source (3), and by 360 ° of cylinder endless belt panoramic pictures of video camera (4) collection tube inner region.Industrial robot (5) drives survey sensor (6) along the tested pipeline axial direction certain distance of advancing then, and by 360 ° of cylinder endless belt panoramic pictures of video camera (4) collection tube inner region, the image data acquiring of Zone Full in accomplishing the measured tube deferent.The annular image that obtains is launched and splices the complete image of composition institute gaging hole wall; Adopt the Image Information Processing technology that it is handled; Carry out the structure of pattern in parameter measurement such as differentiation and defective locations, size and the pipe of defective, thereby realize defective and the topography measurement in the tested pipeline tube wall.

Claims (3)

1. defective and topography measurement device in the microcapillary deferent; It is characterized in that; Form defective and topography measurement sensor in the microcapillary deferent by optical transmission component, lighting source, video camera; And connect with the terminal arthrodesis of industrial robot, manage interior 360 ° of cylinder endless belt panoramic picture data through optical transmission component transmission, video camera take, image pick-up card collects computing machine and handles.
2. defective and topography measurement device is characterized in that the optical transmission component top is provided with 360 ° of axicon lens in the microcapillary deferent as claimed in claim 1, and optical transmission component can be advanced or retreats along microtubule.
3. defective and topography measurement method in the microcapillary deferent is characterized in that, defective and topography measurement method in the microcapillary deferent realize by means of aforementioned means, and comprise the following steps:
(1) pipe under test is accurately located;
(2) industrial robot drives optical transmission component entering pipe under test one sectional position of survey sensor, and keeps the alignment of optical transmission component and pipe under test;
(3) open lighting source, and realize the collection of video camera output annular image data by the computer control image pick-up card;
(4) along the tested pipeline axial direction, repeating step (3) and step (4), the image data acquiring of Zone Full in the completion measured tube deferent;
(5) annular image that obtains is launched and the complete image of institute's gaging hole wall is formed in splicing; Adopt the Image Information Processing technology that it is handled; Carry out the structure of pattern in parameter measurement such as differentiation and defective locations, size and the pipe of defective, thereby realize defective and the topography measurement in the tested pipeline tube wall.
CN2012100994624A 2012-04-06 2012-04-06 Micro-pipe internal flaw and appearance measurement device and method CN102608124A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104092994A (en) * 2014-07-15 2014-10-08 中广核工程有限公司 Nuclear underwater spent fuel rack defect automatic detection method and device
CN104655654B (en) * 2015-02-04 2017-03-15 天津大学 Bearing calibration based on defect characteristic parameter in the micro cautery deferent of size distortion rate
CN107014829A (en) * 2017-06-13 2017-08-04 青岛理工大学 Internal surface of hole mass defect detection means and method based on total reflection dynamic image acquisition
CN107660266A (en) * 2015-05-22 2018-02-02 萨科希瑞斯先进控制有限公司 Apparatus and method for inwall optical detection
CN108645337A (en) * 2018-04-27 2018-10-12 北京理工大学 A kind of depth inside pipe wall Surface Location Error on-line measurement and compensation method
CN109343303A (en) * 2018-10-24 2019-02-15 华中科技大学 A kind of micro- brill visible detection method and device based on inner cone mirror Surface scan panoramic imagery

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CN2562183Y (en) * 2002-07-25 2003-07-23 浙江大学 Fine tube internal surface detector
CN1719191A (en) * 2005-05-18 2006-01-11 浙江大学 Measuring instrument for space curve type long distance fine pipe internal surface shape and its detecting method

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104092994A (en) * 2014-07-15 2014-10-08 中广核工程有限公司 Nuclear underwater spent fuel rack defect automatic detection method and device
CN104092994B (en) * 2014-07-15 2019-03-29 中广核工程有限公司 The underwater spentnuclear fuel screen work defect automatic testing method of nuclear power station and device
CN104655654B (en) * 2015-02-04 2017-03-15 天津大学 Bearing calibration based on defect characteristic parameter in the micro cautery deferent of size distortion rate
CN107660266A (en) * 2015-05-22 2018-02-02 萨科希瑞斯先进控制有限公司 Apparatus and method for inwall optical detection
CN107014829A (en) * 2017-06-13 2017-08-04 青岛理工大学 Internal surface of hole mass defect detection means and method based on total reflection dynamic image acquisition
CN108645337A (en) * 2018-04-27 2018-10-12 北京理工大学 A kind of depth inside pipe wall Surface Location Error on-line measurement and compensation method
CN109343303A (en) * 2018-10-24 2019-02-15 华中科技大学 A kind of micro- brill visible detection method and device based on inner cone mirror Surface scan panoramic imagery

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Application publication date: 20120725

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