CN108226277A - The outer detection probe of a kind of leakage field, electromagnetic acoustic and vortex composite pipeline - Google Patents
The outer detection probe of a kind of leakage field, electromagnetic acoustic and vortex composite pipeline Download PDFInfo
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- CN108226277A CN108226277A CN201711459840.4A CN201711459840A CN108226277A CN 108226277 A CN108226277 A CN 108226277A CN 201711459840 A CN201711459840 A CN 201711459840A CN 108226277 A CN108226277 A CN 108226277A
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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
- G01N27/725—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables by using magneto-acoustical effects or the Barkhausen effect
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
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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
-
- 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
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
-
- 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
Abstract
The outer detection probe of a kind of leakage field, electromagnetic acoustic and vortex composite pipeline, is related to metallic conduit field of non destructive testing.The present invention is to solve the problems, such as that existing single pipeline non-destructive testing method is difficult to that the defects of variety classes is identified.The U-shaped magnetic circuit of the present invention is used to excite axial magnetostatic field in tested pipeline, multiple magneto sensors are fixed on tested pipeline surface and positioned at the centers of U-shaped magnetic circuit, and multiple magneto sensors are used to detect U-shaped the magnetic circuit volume defect of tested pipeline and circumferential area-type defect along tested pipeline circumferential coverage；For measuring pipe thickness, guided wave defects detection part is used to detect U-shaped magnetic circuit along the pipeline axial flaw except tested pipeline circumferential coverage for bulk wave thickness measuring part；EDDY CURRENT module for the defects of detecting tested pipeline surface and near surface and positions defect.The present invention is suitable for the outer detection of pipe with small pipe diameter magnetic conductive metal pipeline.
Description
Technical field
The invention belongs to metallic conduit field of non destructive testing.
Background technology
In industrial production and life, the use of pipeline is ubiquitous.However, with the growth in pipe age, tube wall surface, inside
The defects of generated crack, pit, wall thickness reduction, can frequently result in the generation of leakage and explosion accident, huge so as to cause
Economic loss and serious environmental pollution.In order to ensure the safe handling of pipeline, at this stage, generally using non-destructive testing technology
Periodic detection is carried out to pipeline.
Pipeline non-destructive testing detection method widely used in industrial production includes ray detection method at present, piezoelectric supersonic is examined
Survey method, electromagnetic acoustic detection method, Magnetic Flux Leakage Inspecting method, detection method of eddy.Wherein, piezoelectric detection method needs couplant when detecting,
It is and more demanding to pipe surface cleannes；There is the shortcomings that testing cost is higher, equipment is huge for ray detection method；Leakage field is examined
Survey method can effectively detect wall defects, but it can not measure wall thickness；Electromagnetic acoustic detection method, can be with without couplant
The different types of ultrasonic wave such as bulk wave or guided wave easily is inspired, not only wall defects can effectively be identified, may be used also
Pipe thickness is measured.But it is more sensitive to detection coil lift-off distance, can not effectively detect surface defect, especially
Surface circumferential defect.
As modern detecting is constantly promoted, pipeline inspection technology, which does not require nothing more than, knows the defects of variety classes
Not, it also needs to provide defect information as much as possible, realizes quantitative description.Single non-destructive testing technology is difficult to meet these to want
It asks, this just needs to carry out different pipeline non-destructive testing method compound, so as to have complementary advantages, realizes complete detection.
Patent of invention CN 102661955A are related to a kind of compound detection based on leakage field and electromagnetic acoustic bulk wave thickness measuring and visit
Head.Electromagnetic acoustic bulk wave thickness measuring coil is fixed below permanent magnet by the probe on the basis of magnetic circuit, is effectively realized tested
Part inside and outside wall defect recognition and positioning.But its deficiency is that the fit system of coil and magnet can reduce magnetic circuit to a certain extent
The intensity of magnetization, so as to affect the detection result of Magnetic Flux Leakage Inspecting part.Meanwhile the detection method is applied to detect outside pipeline
When, pipeline axial flaw can not be identified.
Patent of invention CN 101354380A disclose a kind of vortex, electromagnetic acoustic bulk wave thickness measuring combined type non-destructive testing side
Method effectively realizes pipe thickness measurement and its surface and near surface flaw detection, but its deficiency is, by detection method of eddy
The influence of kelvin effect, it is difficult to it is deeper to buried depth the defects of be detected.
Patent of invention CN 102798660A are referred to a kind of inner and outer walls of pipeline compound with current vortex based on three axis leakage fields and lack
Sunken detection method, wherein Magnetic Flux Leakage Inspecting method are used to identify wall defects, while provide comprehensive flaw size information.Later,
By being combined with detection method of eddy, pipe surface and near surface flaw can be accurately positioned.
Patent of invention US 2011/0167914A1 disclose a kind of detection device for being detected in big-diameter pipeline, should
Detection device coordinates with pipeline pig, by the way that three kinds of leakage field, vortex, electromagnetic acoustic bulk wave thickness measuring detection methods are blended, realizes
Comprehensive pipeline defect detection.But the invention can not to axial flaw, the axial flaw especially popped one's head in outside coverage area into
Row effectively detection.
Invention content
The present invention is to be difficult to know the defects of variety classes to solve existing single pipeline non-destructive testing method
Other problem now provides a kind of leakage field, electromagnetic acoustic and vortex composite pipeline outer detection probe.
The outer detection probe of a kind of leakage field, electromagnetic acoustic and vortex composite pipeline includes Magnetic Flux Leakage Inspecting module, electromagnetic acoustic
Detection module and EDDY CURRENT module；
Magnetic Flux Leakage Inspecting module includes：U-shaped magnetic circuit and multiple magneto sensors 6, U-shaped magnetic circuit are used to excite in tested pipeline 4
Axial magnetostatic field, multiple magneto sensors 6 are fixed on 4 surface of tested pipeline and positioned at U-shaped magnetic circuit in the arrangement of multichannel staggered array
Center, multiple magneto sensors 6 are used to detect the body of U-shaped magnetic circuit tested pipeline 4 along 4 circumferential coverage of tested pipeline
Product defect and circumferential area-type defect；
Electromagnetic acoustic detection module includes：Bulk wave thickness measuring part and guided wave defects detection part, bulk wave thickness measuring part are used for
Pipe thickness is measured, guided wave defects detection part is used to detect U-shaped magnetic circuit along the pipeline except 4 circumferential coverage of tested pipeline
Axial flaw；
The defects of EDDY CURRENT module is used to detect 4 surface of tested pipeline and near surface, is additionally operable to position defect,
Bulk wave thickness measuring part and guided wave defects detection part are axially located multiple magneto sensors 6 along tested pipeline 4 respectively
Both sides.
U-shaped magnetic circuit includes：1, two magnet 2 of armature and two pole shoes 3；The end set of pole shoe 3 is fitting tested pipeline 4
The curved-surface structure on surface；
Armature 1 is overlapped on one end of two magnet 2 simultaneously, and two pole shoes 3 are located at the other end of two magnet 2, rank respectively
Iron 1 and two pole shoes 3 are attracted, and the magnetic pole of two magnet 2 is opposite respectively by two 2 suction of magnet with two magnet 2 so that
1, two magnet 2 of armature and two combinations of pole shoe 3 form U-shaped magnetic circuit.
The material of armature 1 and pole shoe 3 is ferrimagnet, and magnet 2 is permanent magnet or electromagnet.
Magneto sensor 6 is Hall sensor, mistor or magnetodiode.
EDDY CURRENT module and bulk wave thickness measuring part are multichannel bulk wave thickness measuring coil 7, and multichannel bulk wave thickness measuring coil 7 is along quilt
Test tube road 4 is circumferentially arranged.
Bulk wave thickness measuring coil 7 is spiral coil or butterfly shaped coils.
Guided wave defects detection part is multichannel Guided waves coil 5, and multichannel Guided waves coil 5 is circumferential along tested pipeline 4
Arrangement.
It is of the invention by Magnetic Flux Leakage Inspecting method, whirlpool in order to realize the comprehensive detection of small-caliber pipeline by way of outer detection
Four kinds of detection methods such as stream detection method, electromagnetic acoustic bulk wave thickness measuring method, electromagnetic ultrasonic guide wave defects detection method are combined, and are designed
Go out a kind of outer detection probe of composite pipeline for pipe with small pipe diameter magnetic conductive metal pipeline defect detection.
Compared with the prior art, advantage of the invention is that：
Four kinds of common detection methods of the outer detection probe set of the composite pipeline of the present invention are：
1st, Magnetic Flux Leakage Inspecting method is mainly used for having the volume defect in magnetic circuit coverage area and circumferential area-type defect
Effect detection；
2nd, electromagnetic acoustic bulk wave thickness measuring method is mainly used for measuring the pipe thickness immediately below detection coil；
3rd, electromagnetic ultrasonic guide wave detection method is mainly used for being detected the pipeline axial flaw except magnetic circuit coverage area；
4th, detection method of eddy is on the one hand for effectively detecting tested pipeline surface defect, so as to make up electromagnetic acoustic
On the other hand detection method can also judge the position of defect the deficiency of lift-off sensitivity.
The outer detection probe of the composite pipeline of the present invention effectively compensates for missing inspection, flase drop caused by the single detection method of tradition
The deficiencies of, the detection information of comprehensive four kinds of detection methods can more accurately judge the shape of defect, position.In addition, by
It is not that simply the sensor stack of four kinds of detection methods is put together in detection probe outside composite pipeline, but is melted
It closes, therefore, effectively reduces the volume of detection probe, so that sonde configuration is simpler, operation is more convenient.During detection
It only need to be along surface of test piece mobile probe.The present invention is suitable for the outer detection of pipe with small pipe diameter magnetic conductive metal pipeline.
Description of the drawings
Fig. 1 is a kind of structure diagram of the outer detection probe of leakage field, electromagnetic acoustic and vortex composite pipeline；
Fig. 2 is the cross-sectional view for being detected pipeline, wherein being divided to detection zone；
Fig. 3 is a kind of two kinds of assembly method schematic diagrames of the outer detection probe of leakage field, electromagnetic acoustic and vortex composite pipeline.
Specific embodiment
Specific embodiment one：Present embodiment is illustrated with reference to Fig. 1, a kind of leakage field, electricity described in present embodiment
Magnetic ultrasound and the outer detection probe of vortex composite pipeline, it includes Magnetic Flux Leakage Inspecting module, electromagnetic acoustic detection module and vortex inspection
Survey module；
Magnetic Flux Leakage Inspecting module includes：U-shaped magnetic circuit and multiple magneto sensors 6, U-shaped magnetic circuit are used to excite in tested pipeline 4
Axial magnetostatic field, multiple magneto sensors 6 are fixed on 4 surface of tested pipeline and positioned at U-shaped magnetic circuit in the arrangement of multichannel staggered array
Center, multiple magneto sensors 6 are used to detect the body of U-shaped magnetic circuit tested pipeline 4 along 4 circumferential coverage of tested pipeline
Product defect and circumferential area-type defect；
Electromagnetic acoustic detection module includes：Bulk wave thickness measuring part and guided wave defects detection part, bulk wave thickness measuring part are used for
Pipe thickness is measured, guided wave defects detection part is used to detect U-shaped magnetic circuit along the pipeline except 4 circumferential coverage of tested pipeline
Axial flaw；
The defects of EDDY CURRENT module is used to detect 4 surface of tested pipeline and near surface, is additionally operable to position defect,
Bulk wave thickness measuring part and guided wave defects detection part are axially located multiple magneto sensors 6 along tested pipeline 4 respectively
Both sides.
In present embodiment, Magnetic Flux Leakage Inspecting module, electromagnetic acoustic detection module and EDDY CURRENT module be simultaneously operable or
Time-sharing work.The axial magnetostatic field of tested pipeline 4 of U-shaped magnetic circuit excitation is common by Magnetic Flux Leakage Inspecting module and electromagnetic acoustic detection module
With.
Specific embodiment two：Present embodiment be to described in specific embodiment one a kind of leakage field, electromagnetic acoustic and
The outer detection probe of vortex composite pipeline is described further, and in present embodiment, U-shaped magnetic circuit includes：1, two magnet 2 of armature
With two pole shoes 3；The end set of pole shoe 3 is to be bonded the curved-surface structure on 4 surface of tested pipeline；
Armature 1 is overlapped on one end of two magnet 2 simultaneously, and two pole shoes 3 are located at the other end of two magnet 2, rank respectively
Iron 1 and two pole shoes 3 are attracted, and the magnetic pole of two magnet 2 is opposite respectively by two 2 suction of magnet with two magnet 2 so that
1, two magnet 2 of armature and two combinations of pole shoe 3 form U-shaped magnetic circuit.
In practical application, two pole shoes 3 are positioned on tested pipeline 4, according to the material properties of tested pipeline 4 and by
The wall thickness in test tube road 4 determines the size of armature 1, magnet 2 and pole shoe 3 so that in tested pipeline zero defect, U-shaped magnetic circuit can
Sufficient intensity axial direction magnetostatic field, the 4 abundant saturation in part of tested pipeline can be excited inside tube wall.
Specific embodiment three：Present embodiment be to described in specific embodiment two a kind of leakage field, electromagnetic acoustic and
The outer detection probe of vortex composite pipeline is described further, and in present embodiment, the material of armature 1 and pole shoe 3 is ferromagnetism
Material, magnet 2 are permanent magnet or electromagnet.
Specific embodiment four：Present embodiment be to described in specific embodiment one a kind of leakage field, electromagnetic acoustic and
The outer detection probe of vortex composite pipeline is described further, and in present embodiment, magneto sensor 6 is Hall sensor, magnetosensitive
Resistance or magnetodiode.
Multiple magneto sensors 6 are respectively positioned on magnetic circuit center, arrange in multichannel staggered array, can effectively realize blind area
Complementation, for detecting the volume defect of the pipeline within magnetic circuit circumferential coverage and circumferential area-type defect.Such as the area in Fig. 2
Shown in domain 1.
Specific embodiment five：Present embodiment be to described in specific embodiment one a kind of leakage field, electromagnetic acoustic and
The outer detection probe of vortex composite pipeline is described further, in present embodiment, EDDY CURRENT module and bulk wave thickness measuring part
It is multichannel bulk wave thickness measuring coil 7, multichannel bulk wave thickness measuring coil 7 is circumferentially arranged along tested pipeline 4.
Specific embodiment six：Present embodiment be to described in specific embodiment five a kind of leakage field, electromagnetic acoustic and
The outer detection probe of vortex composite pipeline is described further, and in present embodiment, bulk wave thickness measuring coil 7 is spiral winding or butterfly
Shape coil.
Bulk wave thickness measuring coil 7 can be generated in tested pipeline 4 based on magnetostriction mechanism under the action of axial magnetic field
Bulk wave, for measuring the pipe thickness immediately below thickness measuring coil.Bulk wave thickness measuring coil 7 also is able to effectively make up electromagnetic acoustic detection
For method for the deficiency of lift-off sensitivity, it is accurate that also defect can be carried out while being detected to pipe surface and near surface flaw
Positioning.
Specific embodiment seven：Present embodiment be to described in specific embodiment one a kind of leakage field, electromagnetic acoustic and
The outer detection probe of vortex composite pipeline is described further, and in present embodiment, guided wave defects detection part is multichannel guided wave
Detection coil 5, multichannel Guided waves coil 5 are circumferentially arranged along tested pipeline 4.
During practical application, printed circuit board technology or enameled wire can be used in Guided waves coil 5 and bulk wave thickness measuring coil 7
Coiling forms, work in a hair one receive or internal loopback pattern under.Guided waves coil 5 is using tortuous coil, for magnetic circuit week
Pipeline axial flaw detection except coverage area.Such as region 2 in Fig. 2.
When actually detected, since single probe does not simply fail to effectively detect volume defect and the week except magnetic circuit coverage area
To defect, the axial flaw within magnetic circuit coverage area can not be also detected, so, generally require 2~3 compound detecting probe mistakes
Position is circumferential to be mounted on 4 outer wall of tested pipeline, so as to fulfill check frequency complementation.As shown in Figure 3.
Claims (7)
1. the outer detection probe of a kind of leakage field, electromagnetic acoustic and vortex composite pipeline, which is characterized in that it includes Magnetic Flux Leakage Inspecting mould
Block, electromagnetic acoustic detection module and EDDY CURRENT module；
Magnetic Flux Leakage Inspecting module includes：U-shaped magnetic circuit and multiple magneto sensors (6), U-shaped magnetic circuit are used to excite in tested pipeline (4)
Axial magnetostatic field, multiple magneto sensors (6) are fixed on tested pipeline (4) surface and positioned at U-shaped in the arrangement of multichannel staggered array
The center of magnetic circuit, multiple magneto sensors (6) are tested for detecting U-shaped magnetic circuit along tested pipeline (4) circumferential coverage
The volume defect of pipeline (4) and circumferential area-type defect；
Electromagnetic acoustic detection module includes：Bulk wave thickness measuring part and guided wave defects detection part, bulk wave thickness measuring part are used to measure
Pipe thickness, guided wave defects detection part are used to detect U-shaped magnetic circuit along the pipeline axis except tested pipeline (4) circumferential coverage
To defect；
EDDY CURRENT module is additionally operable to position defect for the defects of detecting tested pipeline (4) surface and near surface；
Bulk wave thickness measuring part and guided wave defects detection part are axially located multiple magneto sensors (6) along tested pipeline (4) respectively
Both sides.
2. the outer detection probe of a kind of leakage field according to claim 1, electromagnetic acoustic and vortex composite pipeline, feature exist
In U-shaped magnetic circuit includes：Armature (1), two magnet (2) and two pole shoes (3)；
Armature (1) while the one end for being overlapped on two magnet (2), two pole shoes (3) are located at the another of two magnet (2) respectively
End, armature (1) and two pole shoes (3) are attracted, and two magnet (2) respectively by two magnet (2) suction and two magnet (2)
Magnetic pole it is opposite so that armature (1), two magnet (2) and the combination of two pole shoes (3) form U-shaped magnetic circuit.
3. the outer detection probe of a kind of leakage field according to claim 2, electromagnetic acoustic and vortex composite pipeline, feature exist
In the material of armature (1) and pole shoe (3) is ferrimagnet, and magnet (2) is permanent magnet or electromagnet.
4. the outer detection probe of a kind of leakage field according to claim 1, electromagnetic acoustic and vortex composite pipeline, feature exist
In magneto sensor (6) is Hall sensor, mistor or magnetodiode.
5. the outer detection probe of a kind of leakage field according to claim 1, electromagnetic acoustic and vortex composite pipeline, feature exist
It is multichannel bulk wave thickness measuring coil (7) in, EDDY CURRENT module and bulk wave thickness measuring part, multichannel bulk wave thickness measuring coil (7) is along quilt
Test tube road (4) is circumferentially arranged.
6. the outer detection probe of a kind of leakage field according to claim 5, electromagnetic acoustic and vortex composite pipeline, feature exist
In bulk wave thickness measuring coil (7) is spiral coil or butterfly shaped coils.
7. the outer detection probe of a kind of leakage field according to claim 1, electromagnetic acoustic and vortex composite pipeline, feature exist
In guided wave defects detection part is multichannel Guided waves coil (5), and multichannel Guided waves coil (5) is circumferential along tested pipeline (4)
Arrangement.
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| CN108982658A (en) * | 2018-07-12 | 2018-12-11 | 沈阳仪表科学研究院有限公司 | A kind of probe and its system for pipeline detection |
| CN109444259A (en) * | 2018-12-21 | 2019-03-08 | 核动力运行研究所 | A kind of heterotype tubing absorption type eddy current array probe |
| CN109459488A (en) * | 2018-12-25 | 2019-03-12 | 无锡华工大光电智能科技有限公司 | Continuous pipe on-line measuring device |
| CN109973827A (en) * | 2019-03-29 | 2019-07-05 | 东北大学 | A kind of submarine pipeline detection device based on isomery field |
| CN110208366A (en) * | 2019-06-21 | 2019-09-06 | 西红柿科技（武汉）有限公司 | A kind of integrated form Energizing unit for Magnetic Flux Leakage Inspecting |
| CN110779981A (en) * | 2019-11-18 | 2020-02-11 | 北京航空航天大学 | Ferromagnetic pipeline small defect magnetic detection sensor |
| GB2577920A (en) * | 2018-10-10 | 2020-04-15 | Guided Ultrasonics Ltd | Determining thickness of an elongate or extended structure |
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| CN112444219A (en) * | 2020-12-31 | 2021-03-05 | 爱德森（厦门）电子有限公司 | Non-contact ultrasonic electromagnetic coating thickness measuring method and detection device thereof |
| CN112834606A (en) * | 2021-01-07 | 2021-05-25 | 清华大学 | Method and device for identifying defects of inner wall and outer wall based on focusing magnetic flux leakage composite detection |
| CN113532255A (en) * | 2021-07-27 | 2021-10-22 | 爱德森（厦门）电子有限公司 | Method and device for detecting thickness by magnetic flux leakage and eddy current |
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| CN108982658A (en) * | 2018-07-12 | 2018-12-11 | 沈阳仪表科学研究院有限公司 | A kind of probe and its system for pipeline detection |
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| GB2577920A (en) * | 2018-10-10 | 2020-04-15 | Guided Ultrasonics Ltd | Determining thickness of an elongate or extended structure |
| CN113316705A (en) * | 2018-10-10 | 2021-08-27 | 超声超音波有限公司 | Method and system for determining the thickness of an elongated or extended structure |
| CN109444259A (en) * | 2018-12-21 | 2019-03-08 | 核动力运行研究所 | A kind of heterotype tubing absorption type eddy current array probe |
| CN109444259B (en) * | 2018-12-21 | 2024-02-20 | 核动力运行研究所 | Special-shaped pipe adsorption type eddy current array probe |
| CN109459488A (en) * | 2018-12-25 | 2019-03-12 | 无锡华工大光电智能科技有限公司 | Continuous pipe on-line measuring device |
| US20220146406A1 (en) * | 2019-03-28 | 2022-05-12 | Yokogawa Electric Corporation | Sensor device and pipeline monitoring system |
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| CN112834606A (en) * | 2021-01-07 | 2021-05-25 | 清华大学 | Method and device for identifying defects of inner wall and outer wall based on focusing magnetic flux leakage composite detection |
| CN113532255A (en) * | 2021-07-27 | 2021-10-22 | 爱德森（厦门）电子有限公司 | Method and device for detecting thickness by magnetic flux leakage and eddy current |
| CN113532255B (en) * | 2021-07-27 | 2024-01-12 | 爱德森（厦门）电子有限公司 | Method and device for detecting thickness of magnetic leakage and eddy current |
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