CN107843647A - A kind of local high sensitivity Eddy Current Testing Transducer and detection method - Google Patents
A kind of local high sensitivity Eddy Current Testing Transducer and detection method Download PDFInfo
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- CN107843647A CN107843647A CN201711462769.5A CN201711462769A CN107843647A CN 107843647 A CN107843647 A CN 107843647A CN 201711462769 A CN201711462769 A CN 201711462769A CN 107843647 A CN107843647 A CN 107843647A
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- China
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- eddy current
- magnetic core
- test coil
- core bar
- coil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9006—Details, e.g. in the structure or functioning of sensors
Abstract
The invention discloses a kind of local high sensitivity Eddy Current Testing Transducer and detection method, sensor uses inclined Magnetic Core Design, magnetic core bar is fixed on the one side inside test coil of eddy current, so that the alternating magnetic field of the test coil of eddy current one side subrange residing for magnetic core bar obtains convergence enhancing, can be to the keypoint part of detected workpiece with this, carry out targetedly high sensitivity scanning, such as detected for welded tube, because weld seam is emphasis detection position, during using conventional through mode test coil of eddy current, because sensitivity is relatively low, weld defect signal can often drown out None- identified in the signal, and use sensor of the invention, the local sensitivity of scanning weld seam position in test coil of eddy current improves, the defects of weld seam position can be effectively improved Detection capability.
Description
Technical field
The present invention relates to a kind of the cannot-harm-detection device and method, is passed more particularly to a kind of local high sensitivity EDDY CURRENT
Sensor and detection method.
Background technology
Eddy detection technology is the Product quality and safety detection technique commonly used in industrial processes, such as welded tube table
Planar defect detects, and the face of weld defects detection of wherein welded tube is the major tasks in detection, is detected currently for welded tube, generally
Using outer through mode eddy current sensor scanning surface of welded pipe defect, but existing outer through mode eddy current sensor due to sensitivity compared with
It is low, the detection demand for weld seam can not be met, also need to enter weld seam using the special face scanning probe of weld seam in actually detected
Row detection.
The content of the invention
It is an object of the invention to overcome the deficiency of prior art, there is provided a kind of local high sensitivity Eddy Current Testing Transducer
And detection method, solve the problems, such as existing detection technique.
The technical solution adopted for the present invention to solve the technical problems is：A kind of local high sensitivity EDDY CURRENT sensing
Device, including test coil of eddy current, magnetic bias core coil winding skeleton, it is characterised in that：The magnetic bias core coil winds skeleton by one
Individual magnetic core bar and a coil winding skeleton combine, and the section of magnetic core bar is less than the section of coil winding skeleton, magnetic core bar
Longitudinal direction is embedded to be fixed on the side face of coil winding skeleton disalignment side；The test coil of eddy current is circumferentially wound to be fixed on
On the outer peripheral face of magnetic bias core coil winding skeleton.
A kind of detection method of local high sensitivity Eddy Current Testing Transducer, using said apparatus, it is characterised in that：Vortex
Test coil of eddy current in detector excitation local high sensitivity Eddy Current Testing Transducer, test coil of eddy current excitation produce alternation
Magnetic field, magnetic core bar have the function that convergence enhancing alternating magnetic field, because magnetic core is located at test coil of eddy current interior side face, caused
The one side subrange that alternating magnetic field caused by test coil of eddy current excitation is converged to centered on magnetic core bar, such magnetic core bar
The alternating magnetic field of residing test coil of eddy current one side subrange obtains convergence enhancing；In actually detected, by magnetic core bar institute
The detection position that the sensor site alignment at place is detected workpiece carries out scanning, and the detection that the detection position is improved with this is sensitive
Degree.
The invention has the advantages that a kind of local high sensitivity Eddy Current Testing Transducer and detection method, sensor are adopted
With inclined Magnetic Core Design, magnetic core bar is fixed on the one side inside test coil of eddy current so that the vortex inspection residing for magnetic core bar
The alternating magnetic field of test coil one side subrange obtains convergence enhancing, and the keypoint part of detected workpiece can be carried out with this
Targetedly high sensitivity scanning, such as detected for welded tube, because weld seam is emphasis detection position, using conventional through mode
During test coil of eddy current, because sensitivity is relatively low, weld defect signal can often drown out None- identified in the signal, and use this hair
Bright sensor, the local sensitivity of the scanning weld seam position in test coil of eddy current improve, and can effectively improve weld seam position
The defects of Detection capability.
The present invention is described in further detail with reference to embodiments, but a kind of local high sensitivity vortex of the present invention
Detection sensor and detection method are not limited to embodiment.
Brief description of the drawings
The present invention is further described for middle embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the sensor three dimensional structure diagram of the embodiment of the present invention one.
Fig. 2 is the sensor three-dimensional structure decomposing schematic representation of the embodiment of the present invention one.
Fig. 3 is the sensor detecting method schematic diagram of the embodiment of the present invention one.
Fig. 4 is the sensor three dimensional structure diagram of the embodiment of the present invention two.
Fig. 5 is the sensor three-dimensional structure decomposing schematic representation of the embodiment of the present invention two.
Fig. 6 is the sensor detecting method schematic diagram of the embodiment of the present invention two.
In figure, 1. test coil of eddy current, 2. magnetic bias core coils winding skeleton, 20. magnetic core bars, 21 coils winding skeleton, 3.
Welded tube, 30. welded tube welding seams.
Embodiment
Embodiment one, as shown in Figure 1 and Figure 2, a kind of local high sensitivity Eddy Current Testing Transducer of inside-through type, including
Test coil of eddy current 1, magnetic bias core coil winding skeleton 21, it is characterised in that：The magnetic bias core coil winds skeleton 21 by one
Magnetic core bar 20 and a coil winding skeleton 21 combine, and the section of magnetic core bar 20 is less than the section of coil winding skeleton 21,
The longitudinal direction of magnetic core bar 20 is embedded to be fixed on the side face of coil winding skeleton 21 disalignment side；The test coil of eddy current 1 week
To be fastened magnetic bias core coil winding skeleton 21 outer peripheral face on.
Embodiment one, as shown in figure 3, a kind of detection side of the local high sensitivity Eddy Current Testing Transducer of inside-through type
Method, inside-through type scanning is carried out using the inner surface of weld seam 30 of said apparatus Welded Pipe 3, it is characterised in that：Eddy current testing instrument swashs
The test coil of eddy current 1 in inside-through type local high sensitivity Eddy Current Testing Transducer is encouraged, the excitation of test coil of eddy current 1 produces friendship
Varying magnetic field, magnetic core bar 20 has the function that convergence enhancing alternating magnetic field, because magnetic core is located at the interior side of test coil of eddy current 1
Face, the one side subrange for causing test coil of eddy current 1 to encourage caused alternating magnetic field to converge to centered on magnetic core bar 20,
The alternating magnetic field of the one side subrange of test coil of eddy current 1 residing for such magnetic core bar 20 obtains convergence enhancing；, will in detection
The position inner surface of weld seam 30 of sensor site alignment welded tube 3 residing for magnetic core bar 20 wears scanning in carrying out, and the weldering is improved with this
Stitch the detection sensitivity of 30 detection positions.
Embodiment two, such as Fig. 4, Fig. 5, a kind of local high sensitivity Eddy Current Testing Transducer of outer through mode, including vortex
Detection coil 1, magnetic bias core coil winding skeleton 21, it is characterised in that：The magnetic bias core coil winds skeleton 21 by a magnetic core
Bar 20 and a coil winding skeleton 21 combine, and the section of magnetic core bar 20 is less than the section of coil winding skeleton 21, magnetic core
The longitudinal direction of bar 20 is embedded to be fixed on the side face of coil winding skeleton 21 disalignment side；The test coil of eddy current 1 is circumferential to be twined
Wound around magnetic bias core coil is fixed on the outer peripheral face of skeleton 21.
Embodiment two, as shown in fig. 6, a kind of detection side of the local high sensitivity Eddy Current Testing Transducer of outer through mode
Method, outer through mode scanning is carried out using the outer surface of weld seam 30 of said apparatus Welded Pipe 3, it is characterised in that：Eddy current testing instrument swashs
The test coil of eddy current 1 in local high sensitivity Eddy Current Testing Transducer is encouraged, the excitation of test coil of eddy current 1 produces alternating magnetic field,
Magnetic core bar 20 has the function that convergence enhancing alternating magnetic field, because magnetic core is located at the interior side face of test coil of eddy current 1, causes whirlpool
Stream detection coil 1 encourages the one side subrange that caused alternating magnetic field is converged to centered on magnetic core bar 20, such magnetic core
The alternating magnetic field of the one side subrange of test coil of eddy current 1 residing for bar 20 obtains convergence enhancing；In detection, the weldering of welded tube 3
Stitch the sensor site residing for 30 position outer surfaces alignment magnetic core bar 20 and be moved through sensor progress scanning, the inspection is improved with this
Survey the detection sensitivity at position.
Above-described embodiment is only used for further illustrating a kind of local high sensitivity Eddy Current Testing Transducer and the inspection of the present invention
Survey method, but the invention is not limited in embodiment, what every technical spirit according to the present invention was made to above example appoints
What simple modification, equivalent change and modification, each falls within the protection domain of technical solution of the present invention.
Claims (2)
1. a kind of local high sensitivity Eddy Current Testing Transducer, including test coil of eddy current, magnetic bias core coil winding skeleton, it is special
Sign is：The magnetic bias core coil winding skeleton is combined by a magnetic core bar and a coil winding skeleton, magnetic core bar
Section is less than the section of coil winding skeleton, and longitudinally insertion is fixed on the side face that coil winds skeleton disalignment side to magnetic core bar
On；The test coil of eddy current is circumferentially wound to be fixed on the outer peripheral face of magnetic bias core coil winding skeleton.
A kind of 2. detection method of local high sensitivity Eddy Current Testing Transducer, using the device described in claim 1, its feature
It is：Test coil of eddy current in eddy current testing instrument excitation local high sensitivity Eddy Current Testing Transducer, test coil of eddy current swash
Generation alternating magnetic field is encouraged, magnetic core bar has the function that convergence enhancing alternating magnetic field, because magnetic core is located inside test coil of eddy current
One side, the one side part model for causing alternating magnetic field caused by test coil of eddy current excitation to converge to centered on magnetic core bar
Enclose, the alternating magnetic field of the test coil of eddy current one side subrange residing for such magnetic core bar obtains convergence enhancing；It is actually detected
In, the sensor site residing for magnetic core bar is aligned to the detection position progress scanning for being detected workpiece, the test section is improved with this
The detection sensitivity of position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711462769.5A CN107843647A (en) | 2017-12-28 | 2017-12-28 | A kind of local high sensitivity Eddy Current Testing Transducer and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711462769.5A CN107843647A (en) | 2017-12-28 | 2017-12-28 | A kind of local high sensitivity Eddy Current Testing Transducer and detection method |
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| Publication Number | Publication Date |
|---|---|
| CN107843647A true CN107843647A (en) | 2018-03-27 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711462769.5A Withdrawn CN107843647A (en) | 2017-12-28 | 2017-12-28 | A kind of local high sensitivity Eddy Current Testing Transducer and detection method |
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| Country | Link |
|---|---|
| CN (1) | CN107843647A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289609A (en) * | 2019-10-11 | 2020-06-16 | 中国石油大学(华东) | External-penetrating type rotating magnetic field wellhead sucker rod detection system |
| CN111515511A (en) * | 2020-05-08 | 2020-08-11 | 广东电网有限责任公司东莞供电局 | Eddy welding method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4203069A (en) * | 1977-12-29 | 1980-05-13 | Electric Power Research Institute, Inc. | Method and apparatus for non-destructively testing electrically conductive elongate cylindrical components using an eddy current producing coil with a rotor to concentrate the magnetic field in a selected area |
| SU794464A1 (en) * | 1979-02-14 | 1981-01-07 | Научно-Исследовательский Институтэлектронной Интроскопии При Томскомордена Октябрьской Революции И Op-Дена Трудового Красного Знамениполитехническом Институте Им. C.M.Кирова | Pass-through eddy-current modulation transducer |
| US5926020A (en) * | 1994-11-16 | 1999-07-20 | Samson; Rock | Eddy current hybrid probe with movable magnetic field altering member |
| CN1808112A (en) * | 2005-01-17 | 2006-07-26 | 林俊明 | Inside-through type low frequency electromagnetic detection sensor |
| CN102022971A (en) * | 2010-12-21 | 2011-04-20 | 清华大学 | Electric eddy sensor |
| CN102039476A (en) * | 2009-10-15 | 2011-05-04 | 中国海洋石油总公司 | Electromagnetic stirring magnetic head of double-wire submerged arc welding machine |
-
2017
- 2017-12-28 CN CN201711462769.5A patent/CN107843647A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4203069A (en) * | 1977-12-29 | 1980-05-13 | Electric Power Research Institute, Inc. | Method and apparatus for non-destructively testing electrically conductive elongate cylindrical components using an eddy current producing coil with a rotor to concentrate the magnetic field in a selected area |
| SU794464A1 (en) * | 1979-02-14 | 1981-01-07 | Научно-Исследовательский Институтэлектронной Интроскопии При Томскомордена Октябрьской Революции И Op-Дена Трудового Красного Знамениполитехническом Институте Им. C.M.Кирова | Pass-through eddy-current modulation transducer |
| US5926020A (en) * | 1994-11-16 | 1999-07-20 | Samson; Rock | Eddy current hybrid probe with movable magnetic field altering member |
| CN1808112A (en) * | 2005-01-17 | 2006-07-26 | 林俊明 | Inside-through type low frequency electromagnetic detection sensor |
| CN102039476A (en) * | 2009-10-15 | 2011-05-04 | 中国海洋石油总公司 | Electromagnetic stirring magnetic head of double-wire submerged arc welding machine |
| CN102022971A (en) * | 2010-12-21 | 2011-04-20 | 清华大学 | Electric eddy sensor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289609A (en) * | 2019-10-11 | 2020-06-16 | 中国石油大学(华东) | External-penetrating type rotating magnetic field wellhead sucker rod detection system |
| CN111515511A (en) * | 2020-05-08 | 2020-08-11 | 广东电网有限责任公司东莞供电局 | Eddy welding method |
| CN111515511B (en) * | 2020-05-08 | 2022-07-29 | 广东电网有限责任公司东莞供电局 | Eddy welding method |
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Application publication date: 20180327 |