CN103868983A - Improved Barkhausen noise signal detection device - Google Patents
Improved Barkhausen noise signal detection device Download PDFInfo
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- CN103868983A CN103868983A CN201410068607.3A CN201410068607A CN103868983A CN 103868983 A CN103868983 A CN 103868983A CN 201410068607 A CN201410068607 A CN 201410068607A CN 103868983 A CN103868983 A CN 103868983A
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Abstract
The invention relates to an improved Barkhausen noise signal detection device and relates to the technical field of detection equipment of nuclear power plant pressure vessels. The improved Barkhausen noise signal detection device comprises an exciting coil, a U-shaped magnet yoke, a stationary fixture, a test piece and an induction coil sensor, wherein the exciting coil is uniformly wound on the U-shaped magnet yoke; the test piece is arranged on a central axis of the U-shaped magnet yoke through the stationary fixture; the induction coil sensor is arranged inside the U-shaped magnet yoke; the exciting coil provides an excitation signal; the U-shaped magnet yoke, the stationary fixture and the test piece form a main magnetic circuit; the induction coil sensor detects a noise signal transmitted by the test piece. The aims that the detection device is simple in structure and suitable for small test pieces and a signal detection object is enlarged are achieved.
Description
Technical field
The present invention relates to the technical field of nuclear plant pressure vessels checkout equipment.
Background technology
The ageing equipment of nuclear power station, especially pressure vessel due to irradiation damage cause aging by the safety of serious threat nuclear power station.Pressure vessel is nuclear safety one-level equipment, second safety curtain and a circuit pressure border that prevents radioactivity diffusion, be considered to non-exchange equipment in the phase in reactor longevity, power plant safety and power plant are played to vital effect the life-span, are one of core components of power plant safety, aging management.Under nuclear pressure vessel long-term disposal nuclear radiation environment, easily there is embrittlement in reaction vessel, and then generation crackle causes the accident.We need to study embrittlement material, understand pressure vessel embrittlement mechanism.This just needs us to do great many of experiments, unpractical but go to scene to test, because nuclear radiation is great to human injury, this will we sample and test, and nuclear pressure vessel monitoring sample can only adopt small size sample because of space constraint.Traditional Barkhausen noise signal detection system can not detect small members, is necessary for improving pick-up unit.
Traditional Barkhausen noise signal pick-up unit comprises drive coil, U-shaped yoke, magnetic test coil, and this pick-up unit can only detect the test specimen that size is more than or equal to U-shaped magnet, is just difficult to detect Barkhausen noise signal for some little test specimens.Hence one can see that, traditional Barkhausen noise signal pick-up unit can not meet present requirement, can only detect some larger-size test specimens, but have no idea to detect the part so traditional Barkhausen noise signal pick-up unit comes with some shortcomings for some little test specimens.
Summary of the invention
The object of the invention is to provide a kind of simple in structure, is applicable to subsized specimen, has expanded the modified Barkhausen noise signal pick-up unit of input object.
A kind of modified Barkhausen noise signal pick-up unit, comprises drive coil, U-shaped yoke, stationary fixture, test specimen, inductive coil sensor, and drive coil is evenly wound in U-shaped yoke; Test specimen is arranged on U-shaped yoke axis by stationary fixture; U-shaped yoke inside arranges inductive coil sensor; Drive coil provides pumping signal, forms main magnetic circuit by U-shaped yoke, stationary fixture, test specimen, and inductive coil sensor detects the noise signal that test specimen sends.
The number of turn of drive coil of the present invention is that 1500 circles are to 5000 circles.
U-shaped magnet of the present invention is soft magnetic material, and described soft magnetic material is soft magnetic ferrites.
Soft magnetic ferrites of the present invention are made up of jointly iron, manganese, zinc.
Stationary fixture of the present invention comprises setting nut, adjuster bar, and wherein adjuster bar is through the through hole being arranged on U-shaped magnet, and setting nut is arranged in one end away from test specimen on adjuster bar.
The internal placement magnetic core of inductive coil sensor of the present invention, periphery is arranged pure iron screen layer.
The present invention adopts technique scheme, and compared with prior art tool has the following advantages:
1, the present invention utilizes stationary fixture clamping test pieces, can detect the Barkhausen noise signal of miniature dimensions at the test specimen of 10mm*15mm*1mm left and right, solves the weak point of prior device, has expanded the object of input.
2, traditional Barkhausen noise pick-up unit is directly to form magnetic loop by U-shaped magnet and test specimen, and modified Barkhausen noise signal pick-up unit of the present invention is the effect that reaches the Barkhausen noise signal that detects small specimen by U-shaped magnet, fixture and small specimen formation magnetic loop.
3, the innovative point of the inductive coil sensor design in follow-on Barkhausen noise signal pick-up unit has two: one, and what the diameter of magnetic test coil designed only has 4mm, highly only has 9mm, and polarization is better; The 2nd, on magnetic test coil, arranged the pure iron screen layer of high magnetic permeability, weakened coil inside magnetic field to external leakage and shielded the interference of external magnetic field, improved accuracy of detection and the accuracy of inductive coil sensor.
4, U-shaped yoke of the present invention adopts soft magnetic ferrites.Ferritic advantage is that magnetic permeability is very high, and in frequency range widely, has high resistance and eddy current loss is little etc. that advantage is applicable to doing magnetic core, adapts to for interchange field.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is elaborated:
As shown in Figure 1, a kind of modified Barkhausen noise signal pick-up unit, comprises drive coil 1, U-shaped yoke 2, stationary fixture 3, test specimen 4, inductive coil sensor 5, and drive coil 1 is evenly wound in U-shaped yoke 2; Test specimen 4 is arranged on U-shaped yoke 2 axis by stationary fixture 3; U-shaped yoke 2 inside arrange inductive coil sensor 5; Drive coil 1 provides pumping signal, forms main magnetic circuit by U-shaped yoke 2, stationary fixture 3, test specimen 4, and inductive coil sensor 5 detects the noise signal that test specimen 4 sends.
The number of turn of drive coil 1 of the present invention is that 1500 circles are to 5000 circles.
U-shaped magnet 2 of the present invention is soft magnetic material, and described soft magnetic material is soft magnetic ferrites.Consider drawing abillity, remanent magnetism, coercive force, the situation that produces eddy current in coil are finally selected soft magnetic ferrites, FERRITE CORE is mainly by iron (Fe), manganese (Mn), and 3 kinds of metallic element compositions of zinc (Zn), be commonly called manganese-zinc ferrite.Annular ferrite core is owing to there is no air gap, and sectional area is consistent, and therefore magnetic effect is very high.
The internal placement magnetic core 51 of inductive coil sensor 5 of the present invention, periphery is arranged pure iron screen layer 52.
As shown in Figure 1, stationary fixture 3 of the present invention comprises setting nut 31, adjuster bar 32, and wherein adjuster bar 32 is through the through hole 6 being arranged on U-shaped magnet 2, and setting nut 31 is arranged in one end away from test specimen 4 on adjuster bar 32.The present invention is by regulating stationary fixture 3 to make test specimen 4 be positioned at the centre of U-shaped magnet 2; And clamp test specimen, do not stay gap; Final test specimen 4 as far as possible with the upper plane parallel of U-shaped magnet 2.
The present invention is according to electromagnetic induction principle, and when drive coil indirect current, coil produces magnetic field (induced field is strengthened by U-shaped yoke), adds U-shaped magnet at drive coil, and magnetic induction density is strengthened; Two groups of stationary fixtures and test specimen form a toroid, and test specimen is magnetized; In the time of the inner defectiveness of test specimen or unrelieved stress, the inductive coil sensor that is placed on test specimen just can detect larger or less Barkhausen noise signal, magnetic test coil is passed to the noise signal detecting in rear class module, completes the processes such as conditioning, collection, analysis, output.
Claims (6)
1. a modified Barkhausen noise signal pick-up unit, comprises drive coil (1), U-shaped yoke (2), stationary fixture (3), test specimen (4), inductive coil sensor (5), and drive coil (1) is evenly wound in U-shaped yoke (2); Test specimen (4) is arranged on U-shaped yoke (2) axis by stationary fixture (3); U-shaped yoke (2) inside arranges inductive coil sensor (5); Drive coil (1) provides pumping signal, forms main magnetic circuit by U-shaped yoke (2), stationary fixture (3), test specimen (4), and inductive coil sensor (5) detects the noise signal that test specimen (4) sends.
2. modified Barkhausen noise signal pick-up unit according to claim 1, the number of turn that it is characterized in that drive coil (1) is that 1500 circles are to 5000 circles.
3. modified Barkhausen noise signal pick-up unit according to claim 1, is characterized in that above-mentioned U-shaped magnet (2) is soft magnetic material, and described soft magnetic material is soft magnetic ferrites.
4. modified Barkhausen noise signal pick-up unit according to claim 3, is characterized in that above-mentioned soft magnetic ferrites are made up of jointly iron, manganese, zinc.
5. modified Barkhausen noise signal pick-up unit according to claim 1, it is characterized in that above-mentioned stationary fixture (3) comprises setting nut (31), adjuster bar (32), wherein adjuster bar (32) is through the through hole (6) being arranged on U-shaped magnet (2), and setting nut (31) is arranged in the upper one end away from test specimen (4) of adjuster bar (32).
6. modified Barkhausen noise signal pick-up unit according to claim 1, is characterized in that the internal placement magnetic core (51) of above-mentioned inductive coil sensor (5), and periphery is arranged pure iron screen layer (52).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410068607.3A CN103868983B (en) | 2014-02-27 | 2014-02-27 | A kind of modified model Barkhausen noise signal detection device |
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| CN201410068607.3A CN103868983B (en) | 2014-02-27 | 2014-02-27 | A kind of modified model Barkhausen noise signal detection device |
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| CN103868983A true CN103868983A (en) | 2014-06-18 |
| CN103868983B CN103868983B (en) | 2016-08-17 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819795A (en) * | 2015-04-07 | 2015-08-05 | 江苏省特种设备安全监督检验研究院 | Barkhausen stress detection method reducing temperature influence |
| CN105911489A (en) * | 2016-04-10 | 2016-08-31 | 北京工业大学 | Common source double-frequency excitation type multifunctional micro-magnetic signal synchronous detection method |
| CN106404233A (en) * | 2016-08-31 | 2017-02-15 | 广州特种机电设备检测研究院 | Coercive force-based crane wheel pressure testing method |
| CN106841380A (en) * | 2017-01-25 | 2017-06-13 | 哈尔滨理工大学 | For miniature synchronization damage method and device are visited every the top layer of magneto |
| WO2018205607A1 (en) * | 2017-05-09 | 2018-11-15 | 中广核工程有限公司 | Non-destructive assessment method for radiation damage of reactor pressure vessel in nuclear power plant |
| CN112611978A (en) * | 2020-11-30 | 2021-04-06 | 贵州电网有限责任公司 | Ground fault finding detector |
| CN114705245A (en) * | 2022-03-31 | 2022-07-05 | 西安交通大学 | Diagnosis method for disappearance and maintenance of U-shaped water seal of low-pressure drain pipeline of nuclear power plant |
| CN115586244A (en) * | 2022-10-25 | 2023-01-10 | 江苏恩达通用设备集团有限公司 | Nondestructive testing method and device for crimping terminal |
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| CN101178384A (en) * | 2007-12-05 | 2008-05-14 | 南京航空航天大学 | Composite geomagnetic survey system based on barkhausen noise and metal magnetic memory |
| CN101246143A (en) * | 2008-04-02 | 2008-08-20 | 吉林大学 | Device for measuring ferromagnetic material internal stress by impulse electromagnetic field |
| CN101695717A (en) * | 2009-10-27 | 2010-04-21 | 淮海工学院 | Side transducer for detecting rolling pressure of rolling mill |
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| EP0125064A2 (en) * | 1983-05-05 | 1984-11-14 | American Stress Technologies Inc. | Method for detecting stress and defect in a metal piece |
| CN101178384A (en) * | 2007-12-05 | 2008-05-14 | 南京航空航天大学 | Composite geomagnetic survey system based on barkhausen noise and metal magnetic memory |
| CN101246143A (en) * | 2008-04-02 | 2008-08-20 | 吉林大学 | Device for measuring ferromagnetic material internal stress by impulse electromagnetic field |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819795A (en) * | 2015-04-07 | 2015-08-05 | 江苏省特种设备安全监督检验研究院 | Barkhausen stress detection method reducing temperature influence |
| CN105911489A (en) * | 2016-04-10 | 2016-08-31 | 北京工业大学 | Common source double-frequency excitation type multifunctional micro-magnetic signal synchronous detection method |
| CN105911489B (en) * | 2016-04-10 | 2018-11-02 | 北京工业大学 | The multi-functional micro- magnetic signal synchronization detecting method of common source dual-frequency excitation formula |
| CN106404233A (en) * | 2016-08-31 | 2017-02-15 | 广州特种机电设备检测研究院 | Coercive force-based crane wheel pressure testing method |
| CN106841380A (en) * | 2017-01-25 | 2017-06-13 | 哈尔滨理工大学 | For miniature synchronization damage method and device are visited every the top layer of magneto |
| CN106841380B (en) * | 2017-01-25 | 2020-04-28 | 哈尔滨理工大学 | Surface layer damage detection method and device for micro synchronous magnetic isolation motor |
| GB2577425A (en) * | 2017-05-09 | 2020-03-25 | China Nuclear Power Eng Co Ltd | Non-destructive assessment method for radiation damage of reactor pressure vessel in nuclear power plant |
| WO2018205607A1 (en) * | 2017-05-09 | 2018-11-15 | 中广核工程有限公司 | Non-destructive assessment method for radiation damage of reactor pressure vessel in nuclear power plant |
| GB2577425B (en) * | 2017-05-09 | 2022-08-17 | China Nuclear Power Eng Co Ltd | Non-destructive assessment method for radiation damage of reactor pressure vessel in nuclear power plant |
| CN112611978A (en) * | 2020-11-30 | 2021-04-06 | 贵州电网有限责任公司 | Ground fault finding detector |
| CN114705245A (en) * | 2022-03-31 | 2022-07-05 | 西安交通大学 | Diagnosis method for disappearance and maintenance of U-shaped water seal of low-pressure drain pipeline of nuclear power plant |
| CN114705245B (en) * | 2022-03-31 | 2022-12-27 | 西安交通大学 | Diagnosis method for disappearance and maintenance of U-shaped water seal of low-pressure drain pipeline of nuclear power plant |
| CN115586244A (en) * | 2022-10-25 | 2023-01-10 | 江苏恩达通用设备集团有限公司 | Nondestructive testing method and device for crimping terminal |
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