CN104458894B - The detection method and its device of high speed magnet pole of rotor of hydraulic generator yoke T stern notches - Google Patents
The detection method and its device of high speed magnet pole of rotor of hydraulic generator yoke T stern notches Download PDFInfo
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- CN104458894B CN104458894B CN201410741134.9A CN201410741134A CN104458894B CN 104458894 B CN104458894 B CN 104458894B CN 201410741134 A CN201410741134 A CN 201410741134A CN 104458894 B CN104458894 B CN 104458894B
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Abstract
The invention discloses the detection method and device of a kind of high speed magnet pole of rotor of hydraulic generator yoke T stern notches, detection method passes through magnet magnetization magnetic pole yoke T stern notches, the magnetic line of force by T stern notches surface has been blocked when there is crackle, it is distorted the magnetic flux in magnetic circuit, cause part magnetic flux effusion T stern notches surface, stray field is formed in space, magnetic leakage signal is obtained using magneto sensor, and magnetic leakage signal is detected by Magnetic Flux Leakage Testing Instrument.Device includes crackle probe detector, guiding trestle and Magnetic Flux Leakage Testing Instrument, and crackle probe detector is arranged on guiding trestle, and crackle probe detector is connected by signal transmssion line with Magnetic Flux Leakage Testing Instrument；The crackle probe detector includes the П shapes magnet A and three-dimensional hall probe that are fixed on through elastic component on guiding trestle, and the three-dimensional hall probe is amplified by signal and D/A converting circuit is connected through signal terminal with signal transmssion line.
Description
Technical field
The present invention relates to the detection method and its device of a kind of T stern notches, particularly a kind of high speed hydraulic generator rotor magnetic
The detection method and its device of pole yoke T stern notches.
Background technology
T stern notches are a kind of draw bails of hydrogenerator magnetic level and yoke, are formed by 4mm thickness silicon steel lamination layer is folded,
Larger alternate stress is born in shutdown process, particularly its inside lock position stress value is maximum, easily germinates fatigue crack, once
There is the accident for therefore changing whole generator magnetic level yokes, direct, indirect loss is huge.To ensure rotating speed (500r/ high
Min) water-wheel generator magnetic pole couples safety of the T stern notches in long term frequent start and stop operating mode with yoke, it is necessary to the T of magnetic pole yoke
Stern notch carries out crack detection.And detecting the conventional lossless detection method of crackle has EDDY CURRENT (ET), Magnetic testing (MT) and oozes
Detection (PT) thoroughly, three kinds of methods can detect the crackle of imporosity workpiece surface.During the EDDY CURRENT crackle of routine, although no
Using detection liquid, noresidue problem, but strong " boundary effect " is produced to eddy current signal due to being laminated silicon steel sheet so that crackle
Eddy current signal is submerged in background vortex interference, and signal to noise ratio is extremely low, it is impossible to detect crackle.Conventional Magnetic testing, then it is necessary
Using water base or oil base magnetic flaw detection ink, magnetic flaw detection ink cannot be cleared out after entering lamination gap, and detection in detection process, not only be reduced
The insulation of magnetic level yoke will also be polluted.During the Liquid penetrant testing crackle of routine, asked except bleeding agent removing after detecting cannot be solved
Outlying, bleeding back for bleeding agent is remained in lamination gap will also substantially reduce detection sensitivity, cause the missing inspection of crackle, equally cannot
Using.
The content of the invention
It is an object of the present invention to provide a kind of Non-Destructive Testing side of high speed magnet pole of rotor of hydraulic generator yoke T stern notches
Method and its device.The present invention is not only realized to be carried out pollution-free, noresidue to magnetic pole rim lamination structure T stern notches and not to reduce absolutely
The requirement of edge detection, and sensitivity is high, accuracy is good, complies fully with the strict electric and metal of Large Hydroelectric Set and pacifies
Full regulation, improves generating equipment reliability of operation, is the important guarantee of hydrogenerator operation safety.
Technical scheme：The detection method of high speed magnet pole of rotor of hydraulic generator yoke T stern notches, its feature exists
In：By magnet magnetization magnetic pole yoke T stern notches, the magnetic line of force by T stern notches surface is blocked when there is crackle, in making magnetic circuit
Magnetic flux be distorted, cause part magnetic flux effusion T stern notches surface, form stray field in space, obtained using magneto sensor and leaked
Magnetic signal, and magnetic leakage signal is detected by Magnetic Flux Leakage Testing Instrument.
In the detection method of foregoing high speed magnet pole of rotor of hydraulic generator yoke T stern notches, by popping one's head in, guiding trestle will
Probe delivers to test position, and probe is close to subject face using constant force structure, and П shapes magnet A magnetizes the ferromagnetism of detection position
Lamination, produces induced field, when the magnetic line of force for exciting runs into crackle on the tested position of T stern notches, will be formed Lou in cracks
Magnetic field, stray field is received by the magneto sensor in probe and is converted into data signal, by Magnetic Flux Leakage Testing Instrument to crack stray field
Signal transacting and display are carried out, so as to judge that tested T stern notches whether there is crackle.
It is described to judge that tested T stern notches are in the detection method of foregoing high speed magnet pole of rotor of hydraulic generator yoke T stern notches
The no method that there is crackle is three-dimensional hall probe to be placed in into detection position by guiding trestle, in three-dimensional hall probe suddenly
Your element Z is parallel with magnetic pole rim lamination plane, makes tri- equal zero setting of direction signal of X, Y, Z of three-dimensional hall probe；Work as X-direction
The ratio between signal and Z-direction signal intensity are more than or equal to 25:When 1 or the ratio between Y-direction signal and Z-direction signal intensity are more than or equal to
50:When 1, then judge that the laminate surface of detection site has exception.
In the detection method of foregoing high speed magnet pole of rotor of hydraulic generator yoke T stern notches, then by magnetic powder detection method
Recheck at position to there is anomalous field；Magnetic powder detection method is carried out in the steps below：
Abnormal signal portion faces in the clear Magnetic testi that snags；
Open Magnetic testing installation's power source；
The probe of Magnetic testing device is placed in abnormal position surface；
Weak vibrations magnetic flaw detection ink watering can, uniform sprinkling magnetic flaw detection ink is on abnormal position surface；
The magnetic for being applied to surface is adsorbed by stray field, forms visually visible under the ultraviolet illumination of 365nm wavelength
Magnetic trace, so that it is determined that be detected magnetic pole yoke T stern notches there is crackle.
In the detection method of foregoing high speed magnet pole of rotor of hydraulic generator yoke T stern notches, described magnetic flaw detection ink is by following
The raw material of weight portion is mixed：71-73 parts of ethanol, 16-18 parts of ethyl acetate, 2.5-3.5 parts of chloroform, 1.5-2.5 parts
Acetone, 0.15-0.25 part fluorescentmagnetic particle(powder)；Fluorescentmagnetic particle(powder) granularity is 350 mesh.
The detection means of foregoing high speed magnet pole of rotor of hydraulic generator yoke T stern notch detection methods is realized, its feature exists
In：Including crackle probe detector, guiding trestle and Magnetic Flux Leakage Testing Instrument, crackle probe detector is arranged on guiding trestle
On, crackle probe detector is connected by signal transmssion line with Magnetic Flux Leakage Testing Instrument；The crackle probe detector includes warp
Elastic component is fixed on П shapes magnet A and three-dimensional hall probe on guiding trestle, and three-dimensional hall probe is arranged in П shape magnet As
At opening between the two poles of the earth, and the top extended to П shape magnet A bipods inclined-plane is forward extended out, the three-dimensional hall probe is by letter
Number amplify and D/A converting circuit be connected with signal transmssion line through signal terminal.
In the detection means of foregoing high speed magnet pole of rotor of hydraulic generator yoke T stern notches, described three-dimensional hall probe
It is three-dimensional magnetosensitive Hall element array, is made up of tri- orthogonal sheet Hall elements of X, Y, Z, three Hall element T-shaped
Arrangement, can simultaneously measure the magnetic field size and Orientation on tri- directions of XYZ.
In the detection means of foregoing high speed magnet pole of rotor of hydraulic generator yoke T stern notches, the guiding trestle is provided with
Handle, for mobile guide support.
In the detection means of foregoing high speed magnet pole of rotor of hydraulic generator yoke T stern notches, the П shapes magnet A, is neodymium
Nickel cobalt type permanent magnet, for magnetizing to tested position, be open the two poles of the earth pin inclined plane shape at 45 °, respectively with T stern notches inside lock two
Fit side
In the detection means of foregoing high speed magnet pole of rotor of hydraulic generator yoke T stern notches, also including crackle Magnetic testing
Device；Crackle Magnetic testing device includes П shape magnet Bs, is neodymium nickel cobalt type permanent magnet, for magnetizing to tested position, opens
Mouth the two poles of the earth pin inclined plane shape at 45 °, fits with T stern notch inside locks two sides respectively；
Centre wavelength is the miniature LED type uviol lamp of 365nm, is fixed at П shape magnet Bs opening between two-stage, for swashing
Fluoresce magnetic；
Power supply terminal, in П shape magnet Bs, connects miniature LED type uviol lamp；
Belt switch and the dc source of shut-off display, internal battery, for ultraviolet lamp provides power supply；
Anti-flammability power line, for connecting dc source and power supply terminal.
Compared with prior art, the present invention to the T stern notch crackles of high speed water-wheel generator magnetic pole yoke by that can examine
Survey, the dangerous crackle that workpiece is produced in operation is found in time, it is to avoid its extension cracking, threaten the safe operation of unit.This hair
Bright not only realizing carry out pollution-free, noresidue to magnetic pole rim lamination structure T stern notches and do not reduce the requirement of Insulation monitoring, and
And sensitivity is high, accuracy is good, the strict electric and metallic airbag regulation of Large Hydroelectric Set is complied fully with, improve hair
Electric equipment reliability of operation, is the important guarantee of hydrogenerator operation safety.
The present invention uses the special crackle magnetic leakage detecting probe of T stern notches, integrates magnetization and three-dimensional magnetic field detection function, can
Carry out sensitive, quick detection to magnetic pole rim lamination crackle, and electric property to workpiece has no effect.
By the aspect ratio pair of the direction crackle magnetic leakage signals of XYZ tri-, Signal of Cracks and pole sheet gap signal are realized
Discriminating, solving conventional leakage field method cannot detect the problem of lamination crackle.
Be to ensure position accurate in magnetic leakage probe detection process and stabilization, devise special probe bracket to and lead
To device, this support also supports the quick-replaceable of probe to take into account fluorescentmagnetic particle(powder) detection.
The special crackle fluorescentmagnetic particle(powder) detection probe of T stern notches, and do not reduce Workpiece insulating can noresidue fluorescentmagnetic particle(powder) match somebody with somebody
Side, and corresponding characterization processes have been formulated, the reinspection of crackle is realized, improve the high reliability of crack detection.
The present invention can detect that discovery workpiece is in fortune in time to the T stern notch crackles of high speed water-wheel generator magnetic pole yoke
The dangerous crackle produced in row, to avoid its extension cracking, threatens the safe operation of unit.The present invention can accurately and reliably judge T
The presence of crackle and equivalent depth in stern notch.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of crackle probe detector；
Fig. 3 is the structural representation of three-dimensional hall probe；
Fig. 4 is crackle Magnetic Flux Leakage Inspecting view；
Fig. 5 is the structural representation of crackle Magnetic testing device.
Mark in accompanying drawing for：1- Magnetic Flux Leakage Testing Instruments, 2- signal transmssion lines, 3- handles, 4- guiding trestles, 5- crackles probe
Detection means, 6- elastic components, 7- magnetic pole yokes, 8-T stern notches, 9- П shape magnet As, 10- signal terminals, 11- signals amplify and number
Analog conversion circuit, 12- three-dimensional hall probes, 13- П shape magnet Bs, 14- power supply terminals, the miniature LED type uviol lamps of 15-, 16- resistances
Combustion property power line, 17- dc sources.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples, but be not intended as to the present invention limitation according to
According to.
Embodiment.The detection method of high speed magnet pole of rotor of hydraulic generator yoke T stern notches, by popping one's head in, guiding trestle will be visited
Head delivers to test position, and probe is close to subject face using constant force structure, and the ferromagnetism of П shapes magnet A magnetization detection position is folded
Piece, produces induced field, when the magnetic line of force for exciting runs into crackle on the tested position of T stern notches, will form leakage field in cracks
, stray field is received by the magneto sensor in probe and is converted into data signal, crack stray field is entered by Magnetic Flux Leakage Testing Instrument
Row signal transacting and display, so as to judge that tested T stern notches whether there is crackle.
It is described to judge that tested T stern notches are with the presence or absence of the method for crackle, as shown in figure 4, by three-dimensional hall probe by leading
Detection position is placed on to branch, the Hall element Z in three-dimensional hall probe is parallel with magnetic pole rim lamination plane；Make three-dimensional Hall
Tri- equal zero setting of direction signal of X, Y, Z of probe；When the ratio between X-direction signal and Z-direction signal intensity are more than or equal to 25:When 1 or Y
The ratio between direction signal and Z-direction signal intensity are more than or equal to 50:When 1, then judge that the laminate surface of detection site has exception.
The position that there is anomalous field is rechecked by magnetic powder detection method again；Magnetic powder detection method is in the steps below
Carry out：
Abnormal signal portion faces in the clear Magnetic testi that snags；
Open Magnetic testing installation's power source；
The probe of Magnetic testing device is placed in abnormal position surface；
Weak vibrations magnetic flaw detection ink watering can, uniform sprinkling magnetic flaw detection ink is on abnormal position surface；
The magnetic for being applied to surface is adsorbed by stray field, forms visually visible under the ultraviolet illumination of 365nm wavelength
Magnetic trace, so that it is determined that be detected magnetic pole yoke T stern notches there is crackle.
Described magnetic flaw detection ink is mixed by the raw material of following weight portion：71-73 parts of ethanol, 16-18 parts of ethyl acetate,
2.5-3.5 parts of chloroform, 1.5-2.5 parts of acetone, 0.15-0.25 parts of fluorescentmagnetic particle(powder)；Fluorescentmagnetic particle(powder) granularity is 350 mesh.Magnetcisuspension
Liquid boiling point is less than 80 DEG C, and once that will be volatilized rapidly in a short time under applying, normal temperature, no liquid is remained.It is as follows using process：Should
Magnetic flaw detection ink should be configured using in first 5 minutes, load seal-off pressure watering can, and sensitivity is verified on 1mm wire casings on crackle test plate (panel),
The magnetic flaw detection ink term of validity must not exceed 30 minutes.Observation is detected and (has adsorbed fluorescence with the presence or absence of crackle magnetic trace under ultraviolet lamp
The crackle of magnetic, under the irradiation of 365nm length ultraviolet lines, will become apparent from out bright yellow-green fluorescence).It is preferable that, institute
Magnetic flaw detection ink is stated to be mixed by the raw material of following weight portion：72.8 parts of ethanol, 17 parts of ethyl acetate, 3 parts of chloroforms, 2 part third
Ketone, 0.2 part of fluorescentmagnetic particle(powder).
Test plate (panel) is contrasted using magnetic pole rim lamination crackle
Test plate (panel) material：Silicon steel sheet；Test plate (panel) thickness：5mm
Test plate (panel) size：240mm×225mm
Artificial defect：Wire casing (simulating crack)；Processing method：Electrical discharge machining
#1 test blocks：Wire casing size：Deep 1.0mm；4mm long；A/F 0.25mm
#2 test blocks：Wire casing size：Deep 2.0mm；4mm long；A/F 0.25mm
#3 test blocks：Wire casing size：Deep 3.0mm；4mm long；A/F 0.25mm
Crackle contrasts the use of test plate (panel)：
Actual crack is simulated with the wire casing on test plate (panel), such as detection means measures the signal intensity of actual crack, on test plate (panel)
Certain depth wire casing signal is consistent, then using this wire casing depth as the equivalent depth of actual crack.
Before Magnetic Flux Leakage Inspecting, sensitivity check and demarcation are carried out to leakage magnetic detection device on test plate (panel)；
After crack detection, the Signal of Cracks to finding in the detection is compared measurement, to determine the equivalent depth of crackle.
In detection process, leakage field and magnetic particle testing system sensitivity can be verified and checked at any time.
The performance rating and treatment of crackle：
Evaluation：
When crackle equivalent depth is 1mm~2mm, it is determined as I grades；
When crackle equivalent depth is 2mm~3mm, it is determined as II grades；
When crackle equivalent depth is more than 3mm, it is determined as III level；
Treatment：
I grades of defect, polishing is eliminated；
II grades of defect, polishing eliminates and is c-type by being repaiied at this；
III level defect, changes the lamination or implements digging to this crackle.
After all defect treatment, reply mend re-starts detection, it is qualified after can come into operation.
The detection means of above-mentioned high speed magnet pole of rotor of hydraulic generator yoke T stern notch detection methods is realized, is constituted as schemed
Shown in 1-5, including crackle probe detector 5, guiding trestle 4 and Magnetic Flux Leakage Testing Instrument 1, crackle probe detector 5 is arranged on
On guiding trestle 4, crackle probe detector 5 is connected by signal transmssion line 2 with Magnetic Flux Leakage Testing Instrument 1；The crackle probe inspection
Surveying device 5 includes the П shapes magnet A 9 and three-dimensional hall probe 12 that are fixed on through elastic component 6 on guiding trestle 4, and three-dimensional Hall is visited
First 12 are arranged at the opening of П shapes magnet A 9 between the two poles of the earth, and forward extend out the top extended to the bipod inclined-plane of П shapes magnet A 9
End, the three-dimensional hall probe 12 is amplified by signal and D/A converting circuit 11 connects through signal terminal 10 with signal transmssion line 2
Connect.The three-dimensional hall probe 12 can magnetize to tested position, while detecting the magnetic field intensity in tri- dimensions of XYZ；
Signal amplifies and three groups of signal shapings that three-dimensional hall probe 12 is produced synchronously can be changed and amplified by D/A converting circuit 11, leads to
Cross signal terminal to connect with signal transmssion line, detection signal is transmitted to Magnetic Flux Leakage Testing Instrument main frame.Guiding trestle can visit crackle
Head detection means is fixed on test position, and applies constant force support to crackle probe detector, it is to avoid popped one's head in during mobile detection
Produce excessive bounce and swing.
Described three-dimensional hall probe 12 is three-dimensional magnetosensitive Hall element array, by tri- orthogonal sheets of X, Y, Z
Hall element is constituted, and three Hall element landing tees are put, and can simultaneously measure the magnetic field size and Orientation on tri- directions of XYZ.
The guiding trestle 4 is provided with handle 3, for mobile guide support.
The П shapes magnet A 9, is neodymium nickel cobalt type permanent magnet, for magnetizing to tested position, opening the two poles of the earth pin into
45 ° of inclined plane shapes, fit with T stern notch inside locks two sides respectively
Also include crackle Magnetic testing device；Crackle Magnetic testing device includes П shapes magnet B 13, is neodymium nickel cobalt type permanent magnetism
Body, for magnetizing to tested position, be open the two poles of the earth pin inclined plane shape at 45 °, is fitted with T stern notch inside locks two sides respectively；
Centre wavelength is the miniature LED type uviol lamp 15 of 365nm, is fixed at the opening of П shapes magnet B 13 between two-stage, is used
In exciting fluorescentmagnetic particle(powder)；
Power supply terminal 14, in П shapes magnet B 13, connects miniature LED type uviol lamp 15；
Belt switch and the dc source 17 of shut-off display, internal battery, are that miniature LED type uviol lamp 15 provides power supply；
Anti-flammability power line 16, for connecting dc source 17 and power supply terminal 14.
General principle of the invention：When the T stern notches of magnetic pole yoke are magnetized, crackle will be blocked by the magnetic of workpiece surface
The line of force, is distorted the magnetic flux in magnetic circuit, causes part magnetic flux effusion workpiece surface, stray field is formed in space, using magnetic
Sensing element (probe) obtains the signal, and the treatment by detector to magnetic leakage signal, judges flaw size and depth.
Claims (5)
1. the detection method of high speed magnet pole of rotor of hydraulic generator yoke T stern notches, it is characterised in that：By magnet magnetization magnetic pole magnetic
Yoke T stern notches, the magnetic line of force by T stern notches surface has been blocked when there is crackle, is distorted the magnetic flux in magnetic circuit, causes portion
Divide magnetic flux effusion T stern notches surface, stray field is formed in space, magnetic leakage signal is obtained using magneto sensor, and by Magnetic Flux Leakage Inspecting
Instrument is detected to magnetic leakage signal；
By popping one's head in, probe is delivered to test position by guiding trestle, and probe is close to subject face, П shape magnetic using constant force structure
Iron A magnetizes the ferromagnetism lamination of detection position, produces induced field, when the magnetic line of force for exciting runs on the tested position of T stern notches
During crackle, stray field will be formed in cracks, stray field is received by the magneto sensor in probe and is converted into data signal, passes through
Magnetic Flux Leakage Testing Instrument carries out signal transacting and display to crack stray field, so as to judge that tested T stern notches whether there is crackle；
It is described to judge that tested T stern notches are that three-dimensional hall probe is placed in into detection by guiding trestle with the presence or absence of the method for crackle
Position, the Hall element Z in three-dimensional hall probe is parallel with magnetic pole rim lamination plane；Make X, Y, Z tri- of three-dimensional hall probe
The individual equal zero setting of direction signal；When the ratio between X-direction signal and Z-direction signal intensity are more than or equal to 25:When 1 or Y-direction signal and Z side
It is more than or equal to 50 to the ratio between signal intensity:When 1, then judge that the laminate surface of detection site has exception；Examined by magnetic again
Survey method is rechecked to the position that there is anomalous field；Magnetic powder detection method is carried out in the steps below：
Abnormal signal portion faces in the clear Magnetic testi that snags；
Open Magnetic testing installation's power source；
The probe of Magnetic testing device is placed in abnormal position surface；
Weak vibrations magnetic flaw detection ink watering can, uniform sprinkling magnetic flaw detection ink is on abnormal position surface；
The magnetic for being applied to surface is adsorbed by stray field, visually visible magnetic is formed under the ultraviolet illumination of 365nm wavelength
Trace, so that it is determined that being detected magnetic pole yoke T stern notches has crackle；
Described magnetic flaw detection ink is mixed by the raw material of following weight portion：71-73 parts of ethanol, 16-18 parts of ethyl acetate, 2.5-
3.5 parts of chloroforms, 1.5-2.5 parts of acetone, 0.15-0.25 parts of fluorescentmagnetic particle(powder)s；Fluorescentmagnetic particle(powder) granularity is 350 mesh；
Realize the detection means of described high speed magnet pole of rotor of hydraulic generator yoke T stern notch detection methods, including crackle probe
Detection means (5), guiding trestle (4) and Magnetic Flux Leakage Testing Instrument (1), crackle probe detector (5) is installed in guiding trestle (4)
On, crackle probe detector (5) is connected by signal transmssion line (2) with Magnetic Flux Leakage Testing Instrument (1)；The crackle probe detection dress
Putting (5) includes П shapes magnet A (9) being fixed on through elastic component (6) on guiding trestle (4) and three-dimensional hall probe (12), three-dimensional
Hall probe (12) is arranged at the opening of П shapes magnet A (9) between the two poles of the earth, and is forward extended out oblique to П shapes magnet A (9) bipod
The top that face extends, the three-dimensional hall probe (12) is amplified by signal and D/A converting circuit (11) is through signal terminal (10)
It is connected with signal transmssion line (2).
2. the detection method of high speed magnet pole of rotor of hydraulic generator yoke T stern notches according to claim 1, its feature exists
In：Described three-dimensional hall probe (12) is three-dimensional magnetosensitive Hall element array, by tri- orthogonal sheet Halls of X, Y, Z
Element is constituted, and three Hall element landing tees are put, and can simultaneously measure the magnetic field size and Orientation on tri- directions of XYZ.
3. the detection method of high speed magnet pole of rotor of hydraulic generator yoke T stern notches according to claim 1, its feature exists
In：The guiding trestle (4) is provided with handle (3), for mobile guide support.
4. the detection method of high speed magnet pole of rotor of hydraulic generator yoke T stern notches according to claim 1, its feature exists
In：The П shapes magnet A (9), is neodymium nickel cobalt type permanent magnet, and for magnetizing to tested position, opening the two poles of the earth pin is at 45 ° tiltedly
Planar, fits with T stern notch inside locks two sides respectively.
5. the detection method of high speed magnet pole of rotor of hydraulic generator yoke T stern notches according to claim 1, its feature exists
In：Also include crackle Magnetic testing device；Crackle Magnetic testing device includes П shapes magnet B (13), is neodymium nickel cobalt type permanent magnet,
For magnetizing to tested position, be open the two poles of the earth pin inclined plane shape at 45 °, is fitted with T stern notch inside locks two sides respectively；
Centre wavelength is the miniature LED type uviol lamp (15) of 365nm, is fixed at П shapes magnet B (13) opening between two-stage, is used
In exciting fluorescentmagnetic particle(powder)；
Power supply terminal (14), in П shapes magnet B (13), connects miniature LED type uviol lamp (15)；
Belt switch and the dc source (17) of shut-off display, internal battery, are that miniature LED type uviol lamp (15) provides power supply；
Anti-flammability power line (16), for connecting dc source (17) and power supply terminal (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN114994006B (en) * | 2022-07-20 | 2022-11-11 | 安徽省国盛量子科技有限公司 | Crack orthogonal detection system and detection method based on NV color center sensing technology |
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| WO2008093409A1 (en) * | 2007-01-31 | 2008-08-07 | Mitsubishi Electric Corporation | Wire rope flaw detector |
| CN101688851A (en) * | 2007-08-23 | 2010-03-31 | 杰富意钢铁株式会社 | Method and apparatus for detecting uneven surface defect |
| CN202083672U (en) * | 2011-05-19 | 2011-12-21 | 中国人民解放军国防科学技术大学 | Field quantum detection-based leakage magnetic probe |
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| WO2008093409A1 (en) * | 2007-01-31 | 2008-08-07 | Mitsubishi Electric Corporation | Wire rope flaw detector |
| CN101688851A (en) * | 2007-08-23 | 2010-03-31 | 杰富意钢铁株式会社 | Method and apparatus for detecting uneven surface defect |
| CN202083672U (en) * | 2011-05-19 | 2011-12-21 | 中国人民解放军国防科学技术大学 | Field quantum detection-based leakage magnetic probe |
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