CN101887048A - Barkhausen detection system and method under condition of high-speed operations - Google Patents
Barkhausen detection system and method under condition of high-speed operations Download PDFInfo
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Abstract
The invention discloses barkhausen detection system and method under the condition of high-speed operations. The system comprises a direct current power supply, two exciting windings, a magneto-dependent sensor, a signal conditioning circuit, a data acquisition card and a computer processor. In the method, through applying a positive direct voltage and a negative direct voltage to the two exciting windings of U-shaped magnetic yokes, a tested ferro-magnetic material sequentially undergoes magnetization of a positive direction and a negative direction within a period of two magnetic yoke ranges, thereby a lot of barkhausen signals are generated. The invention is mainly applied to dynamically detecting the distribution circumstance of a surface residual stress of the ferro-magnetic material. The invention has higher detection sensitivity, favorable repeatability and reliability of a testing result, high detection speed and suitability for field operations.
Description
Technical field
The present invention relates to a kind of Barkhausen's detection system and method under the high-speed cruising condition, belong to the dynamic test field.
Background technology
At present, the construction of China Express Railway has entered the stage of a fast development, and steel rail defect may cause serious accident, even causes catastrophic consequence.The degree of impairment of rail is mainly peeled off based on scratch, pit, fish scale shape under the slow running, is distributed in the surface, has bigger probability and is continuing in service being polished, and its damage reason mainly is surperficial crush injury.The extruding of wheel and rail certainly will cause the inner stress that produces of rail, unrelieved stress and stealthy crackle, and last unrelieved stress further cracks.If form discovery in time under the crackle initial situation, and, can reduce the probability that crackle produces, increase the service life through the stressed distribution relation on the polishing change track at the track that is used for high-speed railway.Therefore carry out online patrolling and examining for the stress intensity and the surface stress distribution situation of railway track, accomplish that it is very important that the surface stress initial stage is found.
Barkhausen noise (MBN) detection technique is the effective ways that ferrimagnet stress is detected, and comparative maturity.Domestic scholar has done a large amount of tests and engineering application by setting up MBN-stress relation curve to the residual stress measurement of ferromagnetic component, has obtained certain success.Traditional detection system all is by loading ac-excited generation barkhausen signal, and excitation frequency is lower.And Barkhausen noise is a random signal, is a kind of method of statistics to the calculating of signal intensity, and the many more precision of the periodicity of statistics are high more.This just is that realization online detection stress intensity of high speed and stress distribution situation have been brought difficulty.
Excitation frequency is low main because the Barkhausen noise signal is created in violent magnetized area, and promptly production process needs certain hour.In order to solve the problem of speed, just need to produce fast the Barkhausen noise signal.Under the effect of no extraneous factor, the inner initial magnetic domain direction of ferrimagnet is rambling, if stablize positive flux field magnetization ferrimagnet surface with adding earlier, make magnetic domain direction consistent with direction of magnetization, then stablize negative fluxfield magnetization ferrimagnet surface with adding, under the enough big situation of externally-applied magnetic field, 180 ° of deflections can take place rapidly in magnetic domain.The size of choose reasonable yoke, the spacing of two yokes, the position of magneto-dependent sensor and the size of DC voltage can realize quick, online detection rail surface stress and stress distribution situation.
At present, Barkhausen noise detects and all belongs to Static Detection, as the Scan500C of the Stresstech company of Finland development and the microstructure and the stress analysis instrument (3MA-II) of German Fraunhofer Non-Destructive Testing Research Institute, they all adopt the alternating voltage excitation, excitation frequency is all lower, can only online Static Detection, can't resolve the stress intensity of railway track and the problem of surface stress distribution situation detection of dynamic.Based on above defective and deficiency, the present invention proposes a kind of Barkhausen noise detection system under the high-speed cruising condition, be applied to the online detection rail stress of high speed.
Summary of the invention
The present invention seeks to provides Barkhausen's detection system and method under a kind of high-speed cruising condition at the defective that prior art exists.Distinguish mutually with traditional Barkhausen noise detection system, the present invention proposes to adopt continuous-current excitation that rail surface stress and stress distribution are carried out contactless Non-Destructive Testing, this system not only has the advantage of traditional Barkhausen's detection system, and can be applied to the online detection rail stress of high speed.
The present invention adopts following technical scheme for achieving the above object:
Barkhausen's detection system under the high-speed cruising condition of the present invention, comprise direct supply, two drive coils, magneto-dependent sensor, signal conditioning circuit, data collecting card and computer processor, wherein: before and after on the direction of ferromagnetic workpiece operation, place two excitation yokes, two drive coils are respectively on two excitation yokes, the output terminal of direct supply connects drive coil, place in the middle of the excitation yoke input end that is connected signal conditioning circuit with the output terminal of magneto-dependent sensor on the ferromagnetic workpiece, the output terminal of signal conditioning circuit connects the input end of data collecting card, and the output terminal of data collecting card connects the input end of computer processor.
The magneto sensor array that described magneto-dependent sensor distributes for the plane one dimension, single magneto sensor is the giant magnetoresistive type sensor.
Described signal conditioning circuit is made up of the multiple signals amplifying circuit, promptly is made up of one-channel signal amplifying circuit parallel arranged.
The detection method of the Barkhausen's detection system under the high-speed cruising condition comprises the steps:
A. direct supply produces positive negative dc voltage and respectively the drive coil around two excitation yokes is encouraged, the current opposite in direction of the drive coil of two excitation yokes, and the excitation direction that makes two excitation yokes produce is opposite;
B. between yoke two arms, place magneto-dependent sensor, when ferromagnetic workpiece moves with certain speed, the signal that each magneto sensor picks up in the sensor array, expression is the testee part that is traveled through separately, sends Barkhausen noise in different magnetic historys;
When c. there was stress in ferromagnetic workpiece, irreversible reorientation can take place in magnetic domain, thereby influenced barkhausen signal intensity, and magneto-dependent sensor detects the situation of change of barkhausen signal intensity;
D. computer processor is gathered and be transferred to the magneto-dependent sensor output signal by data collecting card after signal conditioning circuit is handled;
E. computer processor is by analyzing the output signal of each magneto sensor in the magneto-dependent sensor and to the calculating of current detection system translational speed, finally obtaining the stress distribution of ferrimagnet.
The present invention is mainly used in surface stress and the stress distribution situation that detects rail, and this detection system has the detection sensitivity height, the system reliability height, and the test result good reproducibility, checkout equipment is simple, and is in light weight, and detection speed is fast, is fit to site work and detection of dynamic.
Description of drawings
Fig. 1 is a system architecture module frame chart of the present invention.
Fig. 2 is a systematic schematic diagram of the present invention.
Fig. 3 is the Barkhausen noise signal, the A and the corresponding respectively constantly moment by A point and B point position of B among the figure.
Embodiment
As shown in Figure 1, a kind of Barkhausen's detection system under the high-speed cruising condition, its structure comprises direct supply, two drive coils, magneto-dependent sensor, signal conditioning circuit, data collecting card and computer processor, wherein: before and after on the direction of ferromagnetic workpiece operation, place two excitation yokes, two drive coils are respectively on two excitation yokes, the output terminal of direct supply connects drive coil, place in the middle of the excitation yoke input end that is connected signal conditioning circuit with the output terminal of magneto-dependent sensor on the ferromagnetic workpiece, the output terminal of signal conditioning circuit connects the input end of data collecting card, and the output terminal of data collecting card connects the input end of computer processor.
As shown in Figure 2, the principle of detection system is expressed as: direct supply produces positive negative dc voltage and respectively the drive coil around two excitation yokes is encouraged, the current opposite in direction of the drive coil of two excitation yokes, the excitation direction that makes two excitation yokes produce is opposite.Between yoke two arms, place magneto-dependent sensor, when ferrimagnet moves with certain speed, the signal that each magneto sensor picks up in the sensor array is the testee part that is traveled through, and what each magneto sensor picked up on sometime is the Barkhausen noise signal that is sent in different magnetic historys.The magneto sensor array that magneto-dependent sensor distributes for the plane one dimension, single magneto sensor is the giant magnetoresistive type sensor.
Be the Barkhausen noise signal as shown in Figure 3, by the distribution of the reasonable adjustment magnetic line of force and the position of Magnetic Sensor, make when the C of testee point during partly successively by A point and B point, testee C point part just in time is in the magnetic domain upset and takes place in the process of Barkhausen noise, and the A point can pick up the Barkhausen noise signal that the corresponding part of C point is constantly produced with the locational Magnetic Sensor of B point.
The specific embodiment of the present invention and basic functional principle are: on the direction of moving along testee, 2 excitation yokes are placed in front and back, and the current opposite in direction of the drive coil of two yokes, and the excitation direction that makes 2 yokes produce is opposite.Tested ferrimagnet has experienced positive and negative two rightabout magnetization in time through 2 yoke scopes successively.Under certain translational speed condition, guarantee that distance and the exciting current between two ones of yokes is enough big, can guarantee (as C point and D point) more arbitrarily in the testee, all have time enough and successively on both direction, all magnetized fully.Reasonably adjust the distribution of the magnetic line of force and the position of Magnetic Sensor, can be so that when the C of testee point part during successively by A point and B point, testee C point part just in time is in the magnetic domain upset and takes place in the process of Barkhausen noise (two moment of A as shown in Figure 3 and B), and A point can pick up the Barkhausen noise signal that corresponding moment C point is partly produced with the locational Magnetic Sensor of B point.Other the time engrave, the signal that A and B sensor are picked up is the barkhausen signal that other part of testee is produced during by A or B position.As when D point during successively by A point and B point, the A point can pick up the Barkhausen noise signal that corresponding D point is constantly partly produced with the locational Magnetic Sensor of B point.So signal that each unit picks up in the sensor array (being time dependent curve), expression is the testee part that is traveled through separately, the Barkhausen noise that (an identical moment of the corresponding magnetic history of each position units) sent in different magnetic historys.If the suffered stress of testee different parts is different, different as the stress that D point and C are ordered, so in the moment of ordering by A point and B separately, the barkhausen signal that sensor picked up is also different.The output signal of each magneto sensor is amplified through signal conditioning circuit, after filtering and the denoising, gathers this signal with data collecting card, sends computer processor to.Data collecting card is a multichannel collecting card, the computer processor record data also deposit in the form of file, then data are handled, at last with the stress of the demonstration test specimen of figure and the size and the stress distribution situation (with the corresponding relation of position) of unrelieved stress.
Claims (4)
1. the Barkhausen's detection system under the high-speed cruising condition, it is characterized in that: comprise direct supply, two drive coils, magneto-dependent sensor, signal conditioning circuit, data collecting card and computer processor, wherein: before and after on the direction of ferromagnetic workpiece operation, place two excitation yokes, two drive coils are respectively on two excitation yokes, the output terminal of direct supply connects drive coil, place in the middle of the excitation yoke input end that is connected signal conditioning circuit with the output terminal of magneto-dependent sensor on the ferromagnetic workpiece, the output terminal of signal conditioning circuit connects the input end of data collecting card, and the output terminal of data collecting card connects the input end of computer processor.
2. the Barkhausen's detection system under the high-speed cruising condition according to claim 1 is characterized in that: the magneto sensor array that described magneto-dependent sensor distributes for the plane one dimension, single magneto sensor is the giant magnetoresistive type sensor.
3. the Barkhausen's detection system under the high-speed cruising condition according to claim 1 is characterized in that: described signal conditioning circuit is made up of the multiple signals amplifying circuit, promptly is made up of one-channel signal amplifying circuit parallel arranged.
4. the detection method based on the Barkhausen's detection system under the described high-speed cruising condition of claim 1 is characterized in that comprising the steps:
A. direct supply produces positive negative dc voltage and respectively the drive coil around two excitation yokes is encouraged, the current opposite in direction of the drive coil of two excitation yokes, and the excitation direction that makes two excitation yokes produce is opposite;
B. between yoke two arms, place magneto-dependent sensor, when ferromagnetic workpiece moves with certain speed, the signal that each magneto sensor picks up in the sensor array, expression is the testee part that is traveled through separately, sends Barkhausen noise in different magnetic historys;
When c. there was stress in ferromagnetic workpiece, irreversible reorientation can take place in magnetic domain, thereby influenced barkhausen signal intensity, and magneto-dependent sensor detects the situation of change of barkhausen signal intensity;
D. computer processor is gathered and be transferred to the magneto-dependent sensor output signal by data collecting card after signal conditioning circuit is handled;
E. computer processor is by analyzing the output signal of each magneto sensor in the magneto-dependent sensor and to the calculating of current detection system translational speed, finally obtaining the stress distribution of ferrimagnet.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655332A (en) * | 2015-02-04 | 2015-05-27 | 山东省计算中心（国家超级计算济南中心） | Non-contact stress detection system and method |
| CN106644186A (en) * | 2017-01-26 | 2017-05-10 | 中国特种设备检测研究院 | Barkhausen array sensor and imaging method |
| CN108645556A (en) * | 2018-08-12 | 2018-10-12 | 西南大学 | A kind of tractor resistance detection device |
| CN108645555A (en) * | 2018-08-12 | 2018-10-12 | 西南大学 | A method of realizing that tractor shear stress senses using magnetic induction |
| CN108709674A (en) * | 2018-08-12 | 2018-10-26 | 西南大学 | A kind of tractor resistance detection structure |
| CN111521310A (en) * | 2019-02-02 | 2020-08-11 | 中国特种设备检测研究院 | Method and system for determining residual stress and residual elimination effect of ferromagnetic material |
| CN111579634A (en) * | 2020-05-21 | 2020-08-25 | 钢研纳克检测技术股份有限公司 | Sampling evaluation method for residual stress on surface of ferromagnetic material |
| CN111610250A (en) * | 2020-07-06 | 2020-09-01 | 中石油西北联合管道有限责任公司 | Intelligent residual magnetism detection test device |
| CN113670483A (en) * | 2021-08-25 | 2021-11-19 | 南昌航空大学 | Method and device for measuring dynamic Barkhausen noise stress |
| CN114136778A (en) * | 2021-11-26 | 2022-03-04 | 南昌航空大学 | Aviation gear grinding burn stress detection method and device |
| CN117740204A (en) * | 2024-02-20 | 2024-03-22 | 沈阳仪表科学研究院有限公司 | Multidirectional stress detection sensor and detection method |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655332A (en) * | 2015-02-04 | 2015-05-27 | 山东省计算中心（国家超级计算济南中心） | Non-contact stress detection system and method |
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| CN108645556A (en) * | 2018-08-12 | 2018-10-12 | 西南大学 | A kind of tractor resistance detection device |
| CN108645555A (en) * | 2018-08-12 | 2018-10-12 | 西南大学 | A method of realizing that tractor shear stress senses using magnetic induction |
| CN108709674A (en) * | 2018-08-12 | 2018-10-26 | 西南大学 | A kind of tractor resistance detection structure |
| CN111521310A (en) * | 2019-02-02 | 2020-08-11 | 中国特种设备检测研究院 | Method and system for determining residual stress and residual elimination effect of ferromagnetic material |
| CN111579634B (en) * | 2020-05-21 | 2023-06-30 | 钢研纳克检测技术股份有限公司 | Sampling evaluation method for residual stress on surface of ferromagnetic material |
| CN111579634A (en) * | 2020-05-21 | 2020-08-25 | 钢研纳克检测技术股份有限公司 | Sampling evaluation method for residual stress on surface of ferromagnetic material |
| CN111610250A (en) * | 2020-07-06 | 2020-09-01 | 中石油西北联合管道有限责任公司 | Intelligent residual magnetism detection test device |
| CN111610250B (en) * | 2020-07-06 | 2023-09-05 | 管网集团(新疆)联合管道有限责任公司 | Intelligent residual magnetism detection test device |
| CN113670483A (en) * | 2021-08-25 | 2021-11-19 | 南昌航空大学 | Method and device for measuring dynamic Barkhausen noise stress |
| CN114136778A (en) * | 2021-11-26 | 2022-03-04 | 南昌航空大学 | Aviation gear grinding burn stress detection method and device |
| CN114136778B (en) * | 2021-11-26 | 2023-04-11 | 南昌航空大学 | Aviation gear grinding burn stress detection method and device |
| CN117740204A (en) * | 2024-02-20 | 2024-03-22 | 沈阳仪表科学研究院有限公司 | Multidirectional stress detection sensor and detection method |
| CN117740204B (en) * | 2024-02-20 | 2024-05-03 | 沈阳仪表科学研究院有限公司 | Multidirectional stress detection sensor and detection method |
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Application publication date: 20101117 |