CN107941901A - A kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step - Google Patents
A kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step Download PDFInfo
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- CN107941901A CN107941901A CN201810052012.7A CN201810052012A CN107941901A CN 107941901 A CN107941901 A CN 107941901A CN 201810052012 A CN201810052012 A CN 201810052012A CN 107941901 A CN107941901 A CN 107941901A
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- 230000004907 flux Effects 0.000 title claims abstract description 24
- 230000005415 magnetization Effects 0.000 claims abstract description 57
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000003860 storage Methods 0.000 claims abstract description 22
- 238000012856 packing Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000005868 electrolysis reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000009659 non-destructive testing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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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
- G01N27/83—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
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Abstract
The present invention proposes a kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step, point-blank there is multiple magnetization units, and each magnetization unit is all equipped with power supply unit, detection storage device, L-type fastener and deformable support；Magnetization unit is the open circles ring-type that both ends are turned up, L-type fastener side is connected to the end of magnetization unit, opposite side is connected with deformable support, deformable support is domed, deformable support arch both ends are connected and fixed with detection storage device, magnetization unit is connected by electric wire with power supply unit, is connected between magnetization unit by scalable packing ring.This detecting system is using multistage DC coil magnetization configuration, the superposition in magnetic field and any adjusting of magnetic field intensity can be achieved, can effectively reduce lower eddy current effect at a high speed influences, and effectively improves Magnetic Flux Leakage Inspecting speed, air switch is set inside power supply unit at the same time, can effectively ensure system safety.
Description
Technical field
The present invention relates to leakage magnetic detection device, more particularly to a kind of High Speed Magnetic Flux Leakage detection system based on magnetic saturation structure step by step
System.
Background technology
Ferrimagnet is due to good plasticity and structural is widely used in building, aerospace, the energy and fortune
The field such as defeated, is easily caused health during its use in its production and application process by various techniques and such environmental effects
Situation runs down, potential danger increase, the serious safe handling and operation for restricting ferrimagnet.
Magnetic Flux Leakage Inspecting technology is as a kind of efficient non-destructive testing technology, the defects of not only can detect numerous types, at the same time
Also can determine whether the geometric shape of defect, to detection environmental requirement it is not high, have strong applicability, can on-line checking, the degree of automation
The advantages that high, be current most widely used non-destructive testing technology, while because of its good stability and anti-interference, very much
It is also widely used under severe industrial environment, is adapted to exist to the ferrimagnet such as material such as steel pipe, rail progress long range
Line detects.
Flux-leakage detection method realizes Non-Destructive Testing to component by picking up fault location stray field signal, but in application process
In, this method must carry out saturated magnetization to tested component first, it effectively could be detected, in the magnetization of static or low speed
During, tested component easily reaches magnetic saturation, woth no need to consider that the required time is established in magnetization；In High Speed Magnetic Flux Leakage detection, magnetic
Change settling time is very short, and the intensity of magnetization needs to can be only achieved the change of stable state, i.e. magnetic induction intensity by certain time
There is delay phenomenon with the change of external magnetic field, this phenomenon is great on the influence of on-line checking accuracy, seriously limits leakage field
The detection speed and detection accuracy of detection method.
Those skilled in the art needs to research and develop a kind of convenient operation, the High Speed Magnetic Flux Leakage that performance is stable, for a wide range of applications
Detecting system, the needs of to meet industrial production and commercial Application.
The content of the invention
Goal of the invention
The problem of detection leakage phenomenon brought present invention is generally directed to magnetic aftereffect phenomenon in High Speed Magnetic Flux Leakage detection process is serious, it is proposed that
A kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step, it can realize that magnetic field intensity is arbitrarily adjusted and magnetic field is folded
Add, realize and carry out magnetized ability step by step, reducing eddy current effect influences, and effectively improves Magnetic Flux Leakage Inspecting speed.
Technical solution
A kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step, including power supply unit, magnetization unit, detection storage dress
Put, scalable packing ring, L-type fastener and deformable support, it is characterised in that：Point-blank there are multiple magnetization units, each
Magnetization unit is all equipped with power supply unit, detection storage device and L-type fastener；The open circles ring-type that magnetization unit turns up for both ends, L
Type fastener side is connected to the end of magnetization unit, and opposite side is connected with deformable support, and deformable support is domed, deformable
Stent arch both ends are connected and fixed with detection storage device, and magnetization unit is connected by electric wire with power supply unit, magnetic
Connected between change unit by scalable packing ring.
The end that the L-type fastener is connected with magnetization unit is equipped with the regulating tank of strip.
The magnetization unit is connected with base.
The magnetization unit is made of magnetizing coil and support frame, and magnetizing coil is made of copper enameled wire, is wrapped in
On support frame.
The magnetization unit uses multiple arranged in co-axial alignment forms, and axial spacing is equal to the equivalent redius of magnetizing coil.
Said supply unit include air switch, pressure regulator, rectifier bridge, DC ammeter, DC power supply, radiator fan,
Current divider, electrolytic capacitor, diode, power resistor, 220V power cords firewire and 220V power cord zero curves；220V power cord firewires
The first input end of air switch is connected, 220V power cords zero curve connects the second input terminal of air switch；The of air switch
The first input end of one output terminal connection pressure regulator, the power supply first input end of the first output terminal connection rectifier bridge of pressure regulator,
The power supply first input end of DC power supply and the power supply first input end of DC ammeter；The second output terminal connection of air switch
Second input terminal of pressure regulator, the confession of power supply the second input terminal, DC power supply of the second output terminal connection rectifier bridge of pressure regulator
The second input terminal of power supply of electric second input terminal and DC ammeter；The forward signal output terminal connection electrolytic capacitor of rectifier bridge
The first input end of anode, the cathode of diode and current divider；The moon of the negative-going signal output terminal connection electrolytic capacitor of rectifier bridge
The output terminal of pole, one end of power resistor and magnetizing coil；The other end of the anode connection power resistor of diode, current divider
First output terminal connects the input terminal of magnetizing coil, and magnetizing coil is wrapped on support frame；The signal first of DC ammeter
Input terminal connects the second output terminal of current divider, the 3rd output of the second input terminal of signal connection current divider of DC ammeter
End；The positive electrode connection DC power supply positive electrode output terminal of radiator fan, the negative electrode connection DC power supply negative electricity of radiator fan
Pole output terminal, radiator fan are placed on rectifier bridge side.
The detection storage device is fixed on the end of support frame side by L-type fastener and deformable support.
The scalable packing ring is accordion, equipped with the accommodating chamber for accommodating detection storage device and deformable support；
Yieldable pad ring outer wall is equipped with intercommunicating pore, and intercommunicating pore connects accommodating chamber with the external world.
Advantage and effect
The present invention is a kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step, is had the following advantages：
1) uses DC coil magnetization configuration, can realize the adjusting of magnetic field intensity by adjusting size of current；
2) saturated structures use arranged in co-axial alignment form to step by step, it is possible to achieve magnetic field superposition, effectively extend magnetizing time, reduce whirlpool
Effect is flowed, reduces the influence of magnetic aftereffect phenomenon, compared to single-stage magnetization configuration, Magnetic Flux Leakage Inspecting speed can be effectively improved；
3) can adjust magnetization series according to actual application environment, applied widely.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the power supply unit attachment structure schematic diagram of the present invention；
Fig. 3 is the magnetization unit schematic diagram of the present invention；
Fig. 4 is inventive sensor array schematic diagram；
Fig. 5 is equivalent redius schematic diagram of the present invention；
Fig. 6 is magnetization unit Distribution of Magnetic Field schematic diagram of the present invention；
Fig. 7 is the structure diagram of present invention detection storage device, scalable packing ring, L-type fastener and deformable support；
Fig. 8 is the scalable packing ring schematic diagram of the present invention.
Description of reference numerals：
1. power supply unit, 1-1. air switches, 1-2. pressure regulators, 1-3. rectifier bridges, 1-4. DC ammeters, 1-5. direct currents
Source, 1-6. radiator fans, 1-7. current dividers, C1Electrolytic capacitor, D1Diode, R1Power resistor, L1.220V power cord fire
Line, L2.220V power cord zero curve, 2. magnetization units, 2-1. magnetizing coils, 2-2. support frames, 3. detection storage devices, 4. can
Expansion bead, 5.L types fastener, 5-1. regulating tanks, 6. deformable supports, 7. bases.
Embodiment
Further explanation is made to the present invention below in conjunction with the accompanying drawings：
As shown in Figure 1, the present invention provides a kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step, including power supply unit
1st, magnetization unit 2, detection storage device 3, scalable packing ring 4, L-type fastener 5 and deformable support 6, point-blank have more
The magnetization unit 2 of a arranged in co-axial alignment form, magnetization unit 2 are connected with base 7, are used to support magnetization unit 2, make magnetization unit 2
Keep concentric with tested pipeline；As shown in fig. 7, each magnetization unit 2 is all equipped with power supply unit 1, detection storage device 3, L-type card
Part 5 and deformable support 6；Magnetization unit 2 is the open circles ring-type that both ends are turned up, and magnetization unit 2 is by magnetizing coil 2-1 and support
Skeleton 2-2 is formed, and magnetizing coil 2-1 is made of copper enameled wire, is wrapped on support frame 2-2, for by DC signal
Magnetic signal is converted to magnetize component；Axial spacing between magnetization unit 2 is equal to the equivalent redius of magnetizing coil 2-1.L
5 side of type fastener is connected to the end of magnetization unit 2, and the end that L-type fastener 5 is connected with magnetization unit 2 is equipped with the adjusting of strip
Groove 5-1.Opposite side is connected with deformable support 6, and deformable support 6 is domed, and 6 arch both ends of deformable support are deposited with detection
Storage device 3 is connected and fixed, and detection storage device 3 is for 360 degree of circumferential arrangements, it can be achieved that collection, storage integral type, are realized
The comprehensive and reliability of defects detection, deformable support 6 can dilatation, reduce collision belt damage；Preferably, may be used
Deformable stent 6 uses elastomeric material, and neither magnetic conduction has certain elasticity again；Magnetization unit 2 is connected by electric wire and power supply unit 1
Connect, power supply unit is used to produce the adjustable DC current signal of size；As shown in figure 8, by scalable between magnetization unit 2
Packing ring 4 connects, and scalable packing ring 4 is accordion, equipped with the accommodating chamber for accommodating detection storage device 3 and deformable support 6；
Scalable 4 outer wall of packing ring is equipped with intercommunicating pore, and intercommunicating pore connects accommodating chamber with the external world.
As shown in Fig. 2, power supply unit 1 include air switch 1-1, pressure regulator 1-2, rectifier bridge 1-3, DC ammeter 1-4,
DC power supply 1-5, radiator fan 1-6, current divider 1-7, electrolytic capacitor C1, diode D1, power resistor R1, 220V power cords fire
Line L1With 220V power cord zero curves L2；220V power cord firewires L1Connect the first input end of air switch 1-1,220V power cords
Zero curve L2Connect the second input terminal of air switch 1-1；The first of the first output terminal connection pressure regulator 1-2 of air switch 1-1
Input terminal, the power supply of the power supply first input end, DC power supply 1-5 of the first output terminal connection rectifier bridge 1-3 of pressure regulator 1-2 the
The power supply first input end of one input terminal and DC ammeter 1-4；The second output terminal connection pressure regulator 1-2 of air switch 1-1
The second input terminal, the second input terminal of power supply of the second output terminal connection rectifier bridge 1-3 of pressure regulator 1-2, DC power supply 1-5
Power the second input terminal and the second input terminal of power supply of DC ammeter 1-4；The forward signal output terminal connection electricity of rectifier bridge 1-3
Solve capacitance C1Anode, diode D1Cathode and current divider 1-7 first input end；The negative-going signal output terminal of rectifier bridge 1-3
Connect electrolytic capacitor C1Cathode, power resistor R1One end and magnetizing coil 2-1 output terminal；Diode D1Anode connection
Power resistor R1The other end, the input terminal of the first output terminal connection magnetizing coil 2-1 of current divider 1-7, magnetizing coil 2-1 twines
It is wound on support frame 2-2, diode D1With power resistor R1And the circuit of current divider 1-7 and coil 2-1 compositions can ensure line
Circle is substantially discharged after a loss of power, avoids impacting with high pressure, protects circuit safety；The signal first of DC ammeter 1-4 inputs
The second output terminal of end connection current divider 1-7, the 3rd of the second input terminal of signal connection current divider 1-7 of DC ammeter 1-4 the
Output terminal；The positive electrode connection DC power supply 1-5 positive electrode output terminals of radiator fan 1-6, the negative electrode connection of radiator fan 1-6
DC power supply 1-5 negative electrode output terminals, radiator fan 1-6 are placed on rectifier bridge 1-3 sides.
As shown in figure 3, magnetization unit principle, X represents coil axis line direction,O A WithO B Loop A and coil B are represented respectively
Central point,RFor coil radius,xFor arbitrary point on coil axis linePAway from 2 hub of a spool pointsODistance, between coil between axial direction
Away from equal to magnetizing coil equivalent redius, for producing uniform magnetic field.
As shown in figure 4, detection storage device uses MLX90393 chips, realize that three-axle magnetic field detects, detection sensor is real
Now gather, store integral type, detection storage device using 360 degree circumferential spread patterns, with strengthen the comprehensive of defects detection with
Reliability.
As shown in figure 5, magnetizing coil equivalent redius schematic diagram, R represents the equivalent redius of coil, R1And R2Line is represented respectively
The internal-and external diameter of the inside radius and outer radius of circle, coil equivalent redius and coil meets following relation：
As shown in fig. 6,O A WithO B Loop A and the central point of coil B are represented respectively,ORepresent 2 hub of a spool points, B represents coil
The magnetic field magnetic induction intensity of generation, X represent coil axis line direction.When two coil axial alignments, the magnetic field of coil generation
Intensity has single axial component on central axes and on the section at axle center midpoint, and the magnetic field that two coils produce occurs to fold
Add, be approximately uniform magnetic field, and magnetic field intensity is the maximum in the range of whole field region, when can improve the magnetization of steel pipe
Between, reducing eddy current effect influences.
Operation principle of the present invention is as follows：
The invention mainly comprises magnetizing assembly and detection device two parts, the present invention, will on original DC excitation architecture basics
Dc magnetization unit magnetizes component using parallel fashion step by step.Multigroup magnetization unit is axially arranged in order, at every two groups
Uniform magnetic field is produced between coil, which, which can effectively reduce eddy current effect in High Speed Magnetic Flux Leakage detection, influences, while member for prolonging magnetic
Change the time.Magnetization unit is powered using power supply unit, the size of current being passed through in coil is adjusted by pressure regulator.
It should be noted that the present invention can use different series magnetization units according to different application background, it is not only to pass through
Embodiment of above realizes the present invention, therefore the equivalent modification or conversion that those skilled in the art make embodiment of above
It should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step, including power supply unit, magnetization unit, detection storage
Device, scalable packing ring, L-type fastener and deformable support, it is characterised in that：Point-blank there are multiple magnetization units, often
A magnetization unit is all equipped with power supply unit, detection storage device and L-type fastener；Magnetization unit is the hollow ring that both ends are turned up
Shape, L-type fastener side are connected to the end of magnetization unit, and opposite side is connected with deformable support, and deformable support is domed, can
Deformable stent arch both ends are connected and fixed with detection storage device, and magnetization unit is connected by electric wire and power supply unit
Connect, connected between magnetization unit by scalable packing ring.
2. the High Speed Magnetic Flux Leakage detecting system according to claim 1 based on magnetic saturation structure step by step, it is characterised in that：It is described
The end that L-type fastener is connected with magnetization unit is equipped with the regulating tank of strip.
3. the High Speed Magnetic Flux Leakage detecting system according to claim 1 based on magnetic saturation structure step by step, it is characterised in that：It is described
Magnetization unit is connected with base.
4. the High Speed Magnetic Flux Leakage detecting system according to claim 1 based on magnetic saturation structure step by step, it is characterised in that：It is described
Magnetization unit is made of magnetizing coil and support frame, and magnetizing coil is made of copper enameled wire, is wrapped on support frame.
5. the High Speed Magnetic Flux Leakage detecting system according to claim 4 based on magnetic saturation structure step by step, it is characterised in that：It is described
Magnetization unit uses multiple arranged in co-axial alignment forms, and axial spacing is equal to the equivalent redius of magnetizing coil.
6. the High Speed Magnetic Flux Leakage detecting system according to claim 4 based on magnetic saturation structure step by step, it is characterised in that：It is described
Power supply unit includes air switch, pressure regulator, rectifier bridge, DC ammeter, DC power supply, radiator fan, current divider, electrolysis electricity
Appearance, diode, power resistor, 220V power cords firewire and 220V power cord zero curves；220V power cords firewire connects air switch
First input end, 220V power cords zero curve connect air switch the second input terminal；The first output terminal connection of air switch
The first input end of pressure regulator, the confession of the power supply first input end, DC power supply of the first output terminal connection rectifier bridge of pressure regulator
The power supply first input end of electric first input end and DC ammeter；The second of the second output terminal connection pressure regulator of air switch
Input terminal, the second input terminal of power supply, the second input terminal of power supply of DC power supply of the second output terminal connection rectifier bridge of pressure regulator
With the second input terminal of power supply of DC ammeter；Anode, the diode of the forward signal output terminal connection electrolytic capacitor of rectifier bridge
Cathode and current divider first input end；Cathode, the power resistor of the negative-going signal output terminal connection electrolytic capacitor of rectifier bridge
One end and magnetizing coil output terminal；The other end of the anode connection power resistor of diode, the first output terminal of current divider
The input terminal of magnetizing coil is connected, magnetizing coil is wrapped on support frame；The signal first input end connection of DC ammeter
Second output terminal of current divider, the 3rd output terminal of the second input terminal of signal connection current divider of DC ammeter；Radiator fan
Positive electrode connection DC power supply positive electrode output terminal, radiator fan negative electrode connection DC power supply negative electrode output terminal, dissipate
Hot-air fan is placed on rectifier bridge side.
7. the High Speed Magnetic Flux Leakage detecting system according to claim 1 based on magnetic saturation structure step by step, it is characterised in that：It is described
Detection storage device is fixed on the end of support frame side by L-type fastener and deformable support.
8. the High Speed Magnetic Flux Leakage detecting system according to claim 1 based on magnetic saturation structure step by step, it is characterised in that：It is described
Scalable packing ring is accordion, equipped with the accommodating chamber for accommodating detection storage device and deformable support；Outside scalable packing ring
Wall is equipped with intercommunicating pore, and intercommunicating pore connects accommodating chamber with the external world.
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Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5117182A (en) * | 1990-06-08 | 1992-05-26 | Atomic Energy Of Canada Limited | Ferromagnetic eddy current probe having multiple levels of magnetization |
| JPH05232087A (en) * | 1992-02-21 | 1993-09-07 | Nkk Corp | Magnetic damage detecting device |
| JPH0784021A (en) * | 1993-09-20 | 1995-03-31 | Mitsui Eng & Shipbuild Co Ltd | Very weak magnetism measuring apparatus and non-destructive inspection method |
| JP2006292607A (en) * | 2005-04-13 | 2006-10-26 | Nippon Denji Sokki Kk | Magnetic powder type flaw detector |
| JP2011027592A (en) * | 2009-07-27 | 2011-02-10 | Nippon Steel Engineering Co Ltd | Piping wall surface inspection method and inspection apparatus |
| CN201859139U (en) * | 2010-08-07 | 2011-06-08 | 东北石油大学 | Magnetic leakage detection magnetizer for storage tank soleplate based on excitation of direct current coil |
| CN103219128A (en) * | 2013-03-20 | 2013-07-24 | 华中科技大学 | Through type permanent magnetizer and magnetic flux leakage testing probe formed by permanent magnetizer |
| CN103278558A (en) * | 2012-12-10 | 2013-09-04 | 重庆交通大学 | Anchoring system nondestructive test apparatus and method based on magnetic induced shrinkage or elongation |
| CN203337609U (en) * | 2013-07-03 | 2013-12-11 | 浙江大学 | Adjustable array magnetizing device used for pipeline guide wave detection |
| CN104122330A (en) * | 2014-07-22 | 2014-10-29 | 华中科技大学 | Pipeline defect detection method and device based on electromagnetic ultrasonic longitudinal guided waves |
| CN104502443A (en) * | 2014-12-12 | 2015-04-08 | 北京工业大学 | Circular-array-type magnetostriction sensor based on orthogonal encircling coil |
| CN104764799A (en) * | 2015-03-30 | 2015-07-08 | 南京航空航天大学 | Detection system and detection method combining alternating current and direct current magnetic flux leakage technologies |
| CN105467001A (en) * | 2015-12-18 | 2016-04-06 | 北京工业大学 | Integral MFL (Magnetic Flux Leakage) and eddy current array sensor for detecting copper-coated/aluminum-coated steel shaft type structure |
| CN106442707A (en) * | 2016-12-14 | 2017-02-22 | 中国计量大学 | Metal pipeline defect detecting device based on low-frequency electromagnetism |
| JP2017090364A (en) * | 2015-11-16 | 2017-05-25 | Ｊｆｅスチール株式会社 | Leakage magnetic flux flaw detection device of thin steel strip and flaw detection method |
| CN106990164A (en) * | 2017-03-29 | 2017-07-28 | 四川大学 | A kind of steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization |
| CN206611342U (en) * | 2017-02-14 | 2017-11-03 | 北京中飞雁科技有限公司 | A kind of isolated form High-current output dc source |
| CN207976429U (en) * | 2018-01-19 | 2018-10-16 | 沈阳工业大学 | A kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step |
-
2018
- 2018-01-19 CN CN201810052012.7A patent/CN107941901B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5117182A (en) * | 1990-06-08 | 1992-05-26 | Atomic Energy Of Canada Limited | Ferromagnetic eddy current probe having multiple levels of magnetization |
| JPH05232087A (en) * | 1992-02-21 | 1993-09-07 | Nkk Corp | Magnetic damage detecting device |
| JPH0784021A (en) * | 1993-09-20 | 1995-03-31 | Mitsui Eng & Shipbuild Co Ltd | Very weak magnetism measuring apparatus and non-destructive inspection method |
| JP2006292607A (en) * | 2005-04-13 | 2006-10-26 | Nippon Denji Sokki Kk | Magnetic powder type flaw detector |
| JP2011027592A (en) * | 2009-07-27 | 2011-02-10 | Nippon Steel Engineering Co Ltd | Piping wall surface inspection method and inspection apparatus |
| CN201859139U (en) * | 2010-08-07 | 2011-06-08 | 东北石油大学 | Magnetic leakage detection magnetizer for storage tank soleplate based on excitation of direct current coil |
| CN103278558A (en) * | 2012-12-10 | 2013-09-04 | 重庆交通大学 | Anchoring system nondestructive test apparatus and method based on magnetic induced shrinkage or elongation |
| CN103219128A (en) * | 2013-03-20 | 2013-07-24 | 华中科技大学 | Through type permanent magnetizer and magnetic flux leakage testing probe formed by permanent magnetizer |
| CN203337609U (en) * | 2013-07-03 | 2013-12-11 | 浙江大学 | Adjustable array magnetizing device used for pipeline guide wave detection |
| CN104122330A (en) * | 2014-07-22 | 2014-10-29 | 华中科技大学 | Pipeline defect detection method and device based on electromagnetic ultrasonic longitudinal guided waves |
| CN104502443A (en) * | 2014-12-12 | 2015-04-08 | 北京工业大学 | Circular-array-type magnetostriction sensor based on orthogonal encircling coil |
| CN104764799A (en) * | 2015-03-30 | 2015-07-08 | 南京航空航天大学 | Detection system and detection method combining alternating current and direct current magnetic flux leakage technologies |
| JP2017090364A (en) * | 2015-11-16 | 2017-05-25 | Ｊｆｅスチール株式会社 | Leakage magnetic flux flaw detection device of thin steel strip and flaw detection method |
| CN105467001A (en) * | 2015-12-18 | 2016-04-06 | 北京工业大学 | Integral MFL (Magnetic Flux Leakage) and eddy current array sensor for detecting copper-coated/aluminum-coated steel shaft type structure |
| CN106442707A (en) * | 2016-12-14 | 2017-02-22 | 中国计量大学 | Metal pipeline defect detecting device based on low-frequency electromagnetism |
| CN206611342U (en) * | 2017-02-14 | 2017-11-03 | 北京中飞雁科技有限公司 | A kind of isolated form High-current output dc source |
| CN106990164A (en) * | 2017-03-29 | 2017-07-28 | 四川大学 | A kind of steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization |
| CN207976429U (en) * | 2018-01-19 | 2018-10-16 | 沈阳工业大学 | A kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step |
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