CN104142365B - The design of a kind of direct current perseverance magnetic source and using method - Google Patents
The design of a kind of direct current perseverance magnetic source and using method Download PDFInfo
- Publication number
- CN104142365B CN104142365B CN201410396640.9A CN201410396640A CN104142365B CN 104142365 B CN104142365 B CN 104142365B CN 201410396640 A CN201410396640 A CN 201410396640A CN 104142365 B CN104142365 B CN 104142365B
- Authority
- CN
- China
- Prior art keywords
- direct current
- magnetic
- tested
- workpiece
- magnetic field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses design and the using method of a kind of direct current perseverance magnetic source, use active magnetic measurement penalty method, the change of laminating gap and the change of tested surface of workpiece roughness between excitation end and the tested surface of workpiece of compensating direct current excitation unit affect the changes of magnetic field causing magnetizing examined workpiece, the magnetic field making magnetization examined workpiece keeps constant, the magnetizing assembly using present invention design can be used for the Non-Destructive Testing work such as Magnetic Flux Leakage Inspecting, Magnetic testing, magnetic stress detection, it can be ensured that tested metal works reaches the magnetization requirement of regulation.
Description
Technical field
The present invention relates to design and the using method of a kind of magnetizing assembly, particularly relate to design and the using method of a kind of direct current perseverance magnetic source.
Background technology
Magnetizing assembly is the device of a kind of magnetizable metal workpiece, such as, in Non-Destructive Testing, Magnetic Flux Leakage Inspecting, Magnetic testing, magnetic stress detection etc. are required for using magnetizing assembly to magnetize tested metal works.In magnetic history, magnetizing assembly forms a magnetic loop with metal works, the magnetic field intensity of magnetizable metal workpiece is had considerable influence, gap change that magnetic field intensity will be caused to change by the magnetization end of magnetizing assembly and the surface gap of metal works, affects metal works and reaches the magnetization requirement of regulation.Such as surface of workpiece has coating, impurity or the change of surface of workpiece roughness that the magnetization end of magnetizing assembly all can be caused to change with the surface gap of metal works, causes magnetic field intensity to change.
Summary of the invention
It is an object of the invention to overcome the deficiency of prior art, design and the using method of a kind of direct current perseverance magnetic source are provided, use active magnetic measurement penalty method, the change of laminating gap and the change of tested surface of workpiece roughness between excitation end and the tested surface of workpiece of compensating direct current excitation unit affect the changes of magnetic field causing magnetizing examined workpiece, make the magnetic field of magnetization examined workpiece keep constant.
nullThe technical solution adopted for the present invention to solve the technical problems is: the design of a kind of direct current perseverance magnetic source and using method，It is characterized in that，Use active magnetic measurement penalty method，The change of laminating gap and the change impact of tested surface of workpiece roughness between excitation end and the tested surface of workpiece of compensating direct current excitation unit cause magnetizing the changes of magnetic field of tested metal works，The magnetic field making the tested metal works of magnetization keeps constant，Its method for designing is，Direct current exciting device uses tabilized current power supply，Magneto sensor is installed in direct current exciting device simultaneously，Described magneto sensor change of magnetic field strength in the magnetic loop that monitoring is made up of direct current exciting device and tested metal works，And change of magnetic field strength is fed back to direct current exciting device，Direct current exciting device is according to the change of magnetic field strength degree in magnetic loop，It is automatically adjusted tabilized current power supply，Revise the exciting current size being passed through in magnet exciting coil，The magnetic field intensity in magnetic loop is made to keep constant，The magnetic field magnetizing tested metal works keeps constant；Further, in described method for designing, the excitation end fixed permanent magnet of direct current exciting device, improves the magnetizability of direct current exciting device, reduces constant-current source volume, just to carry；
Using method has demarcation and two processes of actual measurement,
Described calibration process is,
A. being fitted tightly by tested with standard for the excitation end of direct current exciting device surface of workpiece, the tested surface of workpiece of described standard is without coating, impurity, and surface roughness is standard surface roughness；
B. opening direct current exciting device, according to the magnetization requirement of the tested metal works of standard, be passed through correspondingly sized exciting current in the magnet exciting coil in direct current exciting device, the internal magnetic field produced of magnet exciting coil magnetizes the tested metal works of standard by excitation end；Record the field strength values in the magnetic loop of exciting current value now and magneto sensor measurement；
Described actual measurement process is,
C. the excitation end of direct current exciting device is fitted tightly with surveying tested surface of workpiece；
D. using the exciting current value excitation coil of record in calibration process step b, tested metal works is surveyed by the magnetization of excitation end in the internal magnetic field produced of magnet exciting coil；
E. when surveying tested surface of workpiece state surface of workpiece tested with standard state and being identical, field strength values in the magnetic loop that magneto sensor is measured is identical with the field strength values of magneto sensor record in calibration process step b, surveys tested metal works and reaches the magnetization that regulation requires；
F. there are coating or impurity when the tested surface of workpiece of actual measurement, or when surface roughness is more than standard tested surface of workpiece roughness, excitation end and the laminating gap surveyed between tested surface of workpiece of direct current exciting device become big, field strength values in the magnetic loop that magneto sensor is measured is by less than the field strength values of magneto sensor record in calibration process step b, change of magnetic field strength is fed back to direct current exciting device by magneto sensor, direct current exciting device is according to the intensity of variation of magnetic field intensity, automatically exciting current value is strengthened, increasing is returned to the field strength values of magneto sensor record in calibration process step b by the field strength values in magnetic loop, survey tested metal works and reach the magnetization that regulation requires；
G. when surveying tested surface of workpiece roughness less than standard tested surface of workpiece roughness, excitation end and the laminating gap surveyed between tested surface of workpiece of direct current exciting device diminish, field strength values in the magnetic loop that magneto sensor is measured will be greater than the field strength values of magneto sensor record in calibration process step b, change of magnetic field strength is fed back to direct current exciting device by magneto sensor, direct current exciting device is according to the intensity of variation of magnetic field intensity, automatically exciting current value is reduced, reduction is returned to the field strength values of magneto sensor record in calibration process step b by the field strength values in magnetic loop, survey tested metal works and reach the magnetization that regulation requires.
The invention has the beneficial effects as follows, design and the using method of a kind of direct current perseverance magnetic source are provided, use active magnetic measurement penalty method, the change of laminating gap and the change of tested surface of workpiece roughness between excitation end and the tested surface of workpiece of compensating direct current excitation unit affect the changes of magnetic field causing magnetizing examined workpiece, the magnetic field making magnetization examined workpiece keeps constant, the magnetizing assembly using present invention design can be used for the Non-Destructive Testing work such as Magnetic Flux Leakage Inspecting, Magnetic testing, magnetic stress detection, it can be ensured that tested metal works reaches the magnetization requirement of regulation.
Below in conjunction with embodiment, the present invention is described in further detail, but the design of a kind of direct current perseverance magnetic source of the present invention and using method are not limited to embodiment.
Accompanying drawing explanation
The present invention is further described for middle embodiment.
Fig. 1 is method for designing and the calibration process schematic diagram of first embodiment of the invention.
Fig. 2 is the actual measurement process schematic of first embodiment of the invention.
Fig. 3 is the method for designing schematic diagram of second embodiment of the invention.
In figure, 1. magneto sensor, 2. magnet exciting coil, 3. the excitation end of direct current exciting device, the 4. tested metal works of standard, 5. magnetic loop, 6. actual measurement tested metal works, 7. coating, 8. permanent magnet, DC. direct current exciting device, the laminating gap between excitation end and the tested surface of workpiece of Δ h. direct current exciting device.
Detailed description of the invention
nullEmbodiment，The design of a kind of direct current perseverance magnetic source and using method，It is characterized in that，Use active magnetic measurement penalty method，The change of laminating clearance delta h and the change impact of tested surface of workpiece roughness between excitation end 3 and the tested surface of workpiece of compensating direct current excitation unit DC cause magnetizing the changes of magnetic field of tested metal works，The magnetic field making the tested metal works of magnetization keeps constant，Its method for designing is，Direct current exciting device DC uses tabilized current power supply，Magneto sensor 1 is installed in direct current exciting device DC simultaneously，The described magneto sensor 1 change of magnetic field strength in the magnetic loop 5 that monitoring is made up of direct current exciting device DC and tested metal works，And change of magnetic field strength is fed back to direct current exciting device DC，Direct current exciting device DC is according to the change of magnetic field strength degree in magnetic loop 5，It is automatically adjusted tabilized current power supply，Revise the exciting current size being passed through in magnet exciting coil 2，The magnetic field intensity in magnetic loop 5 is made to keep constant，The magnetic field magnetizing tested metal works keeps constant；
Using method has demarcation and two processes of actual measurement,
Described calibration process is,
A. being fitted tightly on tested with standard for the excitation end 3 of direct current exciting device DC metal works 4 surface, described standard tested metal works 4 surface is without coating, impurity, and surface roughness is standard surface roughness；
B. direct current exciting device DC is opened, magnetization requirement according to the tested metal works of standard 4, being passed through correspondingly sized exciting current in magnet exciting coil 2 in direct current exciting device DC, the internal magnetic field produced of magnet exciting coil 2 magnetizes the tested metal works of standard 4 by excitation end 3；Record the field strength values in the magnetic loop 5 of exciting current value now and magneto sensor 1 measurement；
Described actual measurement process is,
C. the excitation end 3 of direct current exciting device DC is fitted tightly with surveying tested metal works 6 surface；
D. using the exciting current value excitation coil 2 of record in calibration process step b, tested metal works 6 is surveyed by excitation end 3 magnetization in the internal magnetic field produced of magnet exciting coil 2；
E. when surveying tested metal works 6 apparent condition metal works tested with standard 4 apparent condition and being identical, field strength values in the magnetic loop 5 that magneto sensor 1 is measured is identical with the field strength values of magneto sensor 1 record in calibration process step b, surveys tested metal works 6 and reaches the magnetization that regulation requires；
F. when surveying tested metal works 6 surface and having coating 7, or when surface roughness is more than standard tested surface of workpiece roughness, excitation end 3 and laminating clearance delta h surveyed between tested metal works 6 surface of direct current exciting device DC become big, the field strength values that field strength values in the magnetic loop 5 that magneto sensor 1 is measured will record less than magneto sensor 1 in calibration process step b, change of magnetic field strength is fed back to direct current exciting device DC by magneto sensor 1, direct current exciting device DC is according to the intensity of variation of magnetic field intensity, automatically exciting current value is strengthened, increasing is returned to the field strength values that in calibration process step b, magneto sensor 1 records by the field strength values in magnetic loop 5, survey tested metal works 6 and reach the magnetization that regulation requires；
G. when surveying tested metal works 6 surface roughness less than standard tested metal works 4 surface roughness, excitation end 3 and laminating clearance delta h surveyed between tested metal works 6 surface of direct current exciting device DC diminish, field strength values in the magnetic loop 5 that magneto sensor 1 is measured will be greater than the field strength values of magneto sensor 1 record in calibration process step b, change of magnetic field strength is fed back to direct current exciting device DC by magneto sensor 1, direct current exciting device DC is according to the intensity of variation of magnetic field intensity, automatically exciting current value is reduced, reduction is returned to the field strength values that in calibration process step b, magneto sensor 1 records by the field strength values in magnetic loop 5, survey tested metal works 6 and reach the magnetization that regulation requires.
In a second embodiment, the present invention is with the difference of first embodiment:
Further, in described method for designing, excitation end 3 fixed permanent magnet 8 of direct current exciting device DC, improves the magnetizability of direct current exciting device DC, reduces constant-current source volume, just to carry.
Above-described embodiment is only used for further illustrating design and the using method of a kind of direct current perseverance magnetic source of the present invention; but the invention is not limited in embodiment; every any simple modification, equivalent variations and modification made above example according to the technical spirit of the present invention, each falls within the protection domain of technical solution of the present invention.
Claims (2)
1. the design of a direct current perseverance magnetic source and using method, it is characterised in that: use active magnetic measurement penalty method, compensate magnetic
Change the changes of magnetic field of tested metal works, this changes of magnetic field by the excitation end of direct current exciting device and tested surface of workpiece it
Between laminating gap change and tested surface of workpiece roughness change caused, make the magnetic field of the tested metal works of magnetization protect
Holding constant, its method for designing is, uses tabilized current power supply, install magnetosensitive simultaneously in direct current exciting device in direct current exciting device
Element, described magneto sensor magnetic field intensity in the magnetic loop that monitoring is made up of direct current exciting device and tested metal works
Change, and change of magnetic field strength is fed back to direct current exciting device, direct current exciting device becomes according to the magnetic field intensity in magnetic loop
Change degree, is automatically adjusted tabilized current power supply, revises the exciting current size being passed through in magnet exciting coil so that the magnetic field in magnetic loop
Intensity keeps constant, and the magnetic field magnetizing tested metal works keeps constant；
Using method has demarcation and two processes of actual measurement,
Described calibration process is,
A. tested with standard for the excitation end of direct current exciting device surface of workpiece is fitted tightly, the tested metal of described standard
Surface of the work is without coating, impurity, and surface roughness is standard surface roughness；
B. direct current exciting device is opened, according to the magnetization requirement of the tested metal works of standard, the excitation wire in direct current exciting device
Being passed through correspondingly sized exciting current in circle, the internal magnetic field produced of magnet exciting coil magnetizes standard tested metal work by excitation end
Part；Record the field strength values in the magnetic loop of exciting current value now and magneto sensor measurement；
Described actual measurement process is,
C. the excitation end of direct current exciting device is fitted tightly with surveying tested surface of workpiece；
D. the exciting current value excitation coil of record in calibration process step b is used, the internal magnetic field produced of magnet exciting coil
Tested metal works is surveyed by the magnetization of excitation end；
E. when surveying tested surface of workpiece state surface of workpiece tested with standard state and being identical, magnetosensitive unit
Field strength values in the magnetic loop that part is measured is identical with the field strength values of magneto sensor record in calibration process step b, real
Survey tested metal works and reach the magnetization that regulation requires；Coating or impurity, or surface is had when surveying tested surface of workpiece
When roughness is more than standard tested surface of workpiece roughness, the excitation end of direct current exciting device and the tested metal works of actual measurement
Laminating gap between surface becomes big, and the field strength values in the magnetic loop that magneto sensor is measured will be less than calibration process step b
The field strength values of middle magneto sensor record, change of magnetic field strength is fed back to direct current exciting device, DC excitation by magneto sensor
Device, according to the intensity of variation of magnetic field intensity, strengthens exciting current value automatically, and increasing is recovered by the field strength values in magnetic loop
The field strength values of magneto sensor record in calibration process step b, surveys tested metal works and reaches the magnetization that regulation requires；
When surveying tested surface of workpiece roughness less than standard tested surface of workpiece roughness, encouraging of direct current exciting device
Magnetic end and the laminating gap surveyed between tested surface of workpiece diminish, the magnetic field intensity in the magnetic loop that magneto sensor is measured
Value will be greater than the field strength values of magneto sensor record in calibration process step b, and change of magnetic field strength is fed back to by magneto sensor
Direct current exciting device, direct current exciting device, according to the intensity of variation of magnetic field intensity, reduces exciting current value, in magnetic loop automatically
Reduction is returned to the field strength values of magneto sensor record in calibration process step b by field strength values, surveys tested metal work
Part reaches the magnetization that regulation requires.
The design of a kind of direct current perseverance magnetic source the most according to claim 1 and using method, it is characterised in that: further,
In described method for designing, the excitation end fixed permanent magnet of direct current exciting device, improve the magnetizability of direct current exciting device,
Reduce constant-current source volume, just to carry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410396640.9A CN104142365B (en) | 2014-08-13 | 2014-08-13 | The design of a kind of direct current perseverance magnetic source and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410396640.9A CN104142365B (en) | 2014-08-13 | 2014-08-13 | The design of a kind of direct current perseverance magnetic source and using method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104142365A CN104142365A (en) | 2014-11-12 |
| CN104142365B true CN104142365B (en) | 2016-10-26 |
Family
ID=51851599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410396640.9A Active CN104142365B (en) | 2014-08-13 | 2014-08-13 | The design of a kind of direct current perseverance magnetic source and using method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104142365B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10185021B2 (en) * | 2016-12-14 | 2019-01-22 | General Electric Company | Non-contact magnetostrictive sensor alignment methods and systems |
| CN112147215A (en) * | 2020-09-23 | 2020-12-29 | 上海磁海无损检测设备制造有限公司 | Magnetization control method and system, control device and equipment for magnetic powder flaw detection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07297030A (en) * | 1994-04-22 | 1995-11-10 | Fuji Elelctrochem Co Ltd | Magnetic field generator |
| CN201163559Y (en) * | 2008-01-22 | 2008-12-10 | 太原正好磁性设备有限公司 | Constant magnetic field continuous magnetizer |
| CN101666778A (en) * | 2009-09-23 | 2010-03-10 | 帅立国 | Two-dimensional electromagnetic detector and magneticrotation detection method |
| CN103119432A (en) * | 2010-12-21 | 2013-05-22 | 新东工业株式会社 | Surface property magnetic evaluation device and method |
| CN203466004U (en) * | 2013-09-27 | 2014-03-05 | 北京方德信安科技有限公司 | Program-controlled constant flow source demagnetization device |
-
2014
- 2014-08-13 CN CN201410396640.9A patent/CN104142365B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07297030A (en) * | 1994-04-22 | 1995-11-10 | Fuji Elelctrochem Co Ltd | Magnetic field generator |
| CN201163559Y (en) * | 2008-01-22 | 2008-12-10 | 太原正好磁性设备有限公司 | Constant magnetic field continuous magnetizer |
| CN101666778A (en) * | 2009-09-23 | 2010-03-10 | 帅立国 | Two-dimensional electromagnetic detector and magneticrotation detection method |
| CN103119432A (en) * | 2010-12-21 | 2013-05-22 | 新东工业株式会社 | Surface property magnetic evaluation device and method |
| CN203466004U (en) * | 2013-09-27 | 2014-03-05 | 北京方德信安科技有限公司 | Program-controlled constant flow source demagnetization device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104142365A (en) | 2014-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10677755B2 (en) | Apparatus and method for detecting inner defects of steel plate | |
| CN105929347B (en) | A kind of quick magnetic material magnetic characteristic measurement method | |
| JP6209674B2 (en) | Magnetic head for detecting surface magnetic field of magnetic pattern based on magnetoresistive technology | |
| CN106814131B (en) | Ferromagnetic planar member shallow layer damage magnetic emission detection method and magnetic emission detection system | |
| WO2010136164A3 (en) | Method and arrangement for magnetically determining a position | |
| US20150145509A1 (en) | Conductive foreign material detecting apparatus | |
| Kim et al. | A new sensitive excitation technique in nondestructive inspection for underground pipelines by using differential coils | |
| CN104142365B (en) | The design of a kind of direct current perseverance magnetic source and using method | |
| Kostin et al. | On new possibilities for making local measurements of the coercive force of ferromagnetic objects | |
| Kim et al. | Detection method of cracks by using magnetic fields in underground pipeline | |
| US20200209080A1 (en) | System and method for measuring electromagnetic characteristic on a component | |
| CN104112563B (en) | A kind of designing and employing method exchanging Heng Ciyuan | |
| Stupakov et al. | Applicability of local magnetic measurements | |
| CN103940860B (en) | A kind of method of series resonant circuit capacitance detecting nonmetallic materials discontinuity | |
| US10088453B2 (en) | Apparatus and method of detecting defect of steel plate | |
| Aguila-Munoz et al. | Crack detection in steel using a GMR-based MFL probe with radial magnetization | |
| Lijian et al. | Sensor development and application on the oil-gas pipeline magnetic flux leakage detection | |
| RU2483301C1 (en) | Method for local measurement of coercitive force of ferromagnetic objects | |
| CN103940859B (en) | A kind of method of antiresonant circuit capacitance detecting nonmetallic materials discontinuity | |
| JP2012198202A (en) | Device for inspecting minute magnetic metallic foreign matters | |
| Zhang et al. | Magnetic coil parameters design of oil casing damage detector based on magnetic flux leakage | |
| CN112097634A (en) | Carburized layer detector and detection method thereof | |
| CN103954682A (en) | Method for detecting discontinuity of nonmetal material by virtue of inductance of shunt-resonant circuit | |
| CN103954654A (en) | Method for detecting discontinuity of nonmetal material by virtue of inductance of series resonant circuit | |
| CN102298122A (en) | Apparatus and method for measuring vertical component of magnetic induction intensity by optical pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |