CN103412267A - Method and device for measuring magnetic declination of tile-shaped magnet element - Google Patents
Method and device for measuring magnetic declination of tile-shaped magnet element Download PDFInfo
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- CN103412267A CN103412267A CN2013103632831A CN201310363283A CN103412267A CN 103412267 A CN103412267 A CN 103412267A CN 2013103632831 A CN2013103632831 A CN 2013103632831A CN 201310363283 A CN201310363283 A CN 201310363283A CN 103412267 A CN103412267 A CN 103412267A
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 126
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 42
- 230000002950 deficient Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000012797 qualification Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000005347 demagnetization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000005408 paramagnetism Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The invention discloses a method and device for measuring the magnetic declination of a tile-shaped magnet element. Firstly, the deflection height, relative to the datum line, of a datum component is detected under the action of a magnetic field, the deflection height, relative to the datum line, of the datum component serves as the detection datum, and then when a product to be detected is detected in the magnetic filed, the deflection height, relative to the datum line, of the product to be detected and the deflection height, relative to the datum line, of the datum component are compared to obtain whether the magnetic declination of the product to be detected is qualified. The method and device have the advantages that operation is simple, cost is low, the tile-shaped magnet element (after orientation forming) without magnetizing is detected, full detection of the magnetic declination of the tile-shaped magnet element can be achieved, and the percent of pass of the magnetic declination of the tile-shaped magnet elements of the whole batch is guaranteed.
Description
Technical field
The present invention relates to a kind of method and apparatus of measuring magnetic declination, especially relate to a kind of method and apparatus be used to the magnetic declination of measuring the tile magnetic element.
Background technology
Countries in the world economy suffers that continuously financial crisis and economy are low over a long time in recent years, reduces the more aobvious sensitivity of requirement of labor cost, and the demand of the production automation is urgent all the more.Of a great variety, and New-type electric machine not of uniform size also obviously improves its quality and demand as the main devices of automated production.The tile magnetic element is as the critical elements of exploitation motor, and the quality of its performance has directly affected the quality of motor, so the tile magnetic element requires to have performance preferably.Magnetic declination is as a performance parameter of tile magnetic element, refer to magnet the magnetize magnetic direction (equaling direction of orientation) of rear reality and an angle degree of geometrical axis (the desirable magnetizing direction of design), the magnetic direction of anisotropy magnet reality is determined by magnet alignment magnetic field direction when compressing, therefore, the magnetic declination of tile permanent magnet elements is that the error by anisotropic permanent magnet material moulding orientation process and process causes, inevitable.But, the magnetic declination of tile magnetic element is less, and it is just higher that the motor electromagnetic forces of making converts mechanical energy (dynamic torque) effect to, rotates also steady, also require simultaneously its magnetic declination can not be too large, namely can not surpass the higher limit (in acceptability limit) of the magnetic declination of setting.
The method of the magnetic declination of existing measurement tile magnetic element is: the three-dimensional magnetic moment of at first measuring simultaneously the tile magnetic element by 3D Hai Muhuoci coil, then by the row operation of going forward side by side of instrument to collect data, calculate the magnetic direction of tile magnetic element reality and the angle of geometrical axis, finally the display of the display screen by instrument or the computer angle that will test gained shows.But there is following defect in said method: one, equipment complexity, cost is higher, two, the tile magnetic element must have magnetic when measuring magnetic declination, be that the tile magnetic element just can carry out the test of magnetic declination after after the pressing orientating moulding, needing to magnetize, when needs provide the tile magnetic element without magnetic, after being completed, magnetic declination needs the processing of demagnetizing of tile magnetic element, but by the tile magnetic element that the ferromagnetic materials such as sintered NdFeB the are prepared from rear very difficult demagnetization of magnetizing, and again magnetize in case be difficult to after demagnetization, therefore said method only can be for sampling observation, can't guarantee the qualification rate of the magnetic declination of inferior by the gross tile magnetic element.
Summary of the invention
It is lower that one of technical matters to be solved by this invention is to provide a kind of cost, and the method be used to the magnetic declination of measuring the tile magnetic element that can detect the tile magnetic element do not magnetized.Method be used to the magnetic declination of measuring the tile magnetic element of the present invention can realize the full inspection of the magnetic declination of tile magnetic element, the qualification rate of the magnetic declination of the tile magnetic element guaranteed by the gross time.
The present invention solves the problems of the technologies described above the technical scheme adopted: a kind of method be used to the magnetic declination of measuring the tile magnetic element comprises the following steps:
1. choose the tile magnetic element do not magnetized of the higher limit that a magnetic declination is acceptability limit as standard;
2. standard is placed on a leveling board of being made by non-magnet material, the concave surface of standard upward and the two ends, left and right keep level, the connecting line on the summit at two ends, left and right now is set as to datum line;
3. the magnetic field that applies directly over standard vertically downward or make progress, the left end of standard or right-hand member deflect and are upturned;
4. the end that is upturned of detection reference spare is with respect to the height of datum line deflection;
5. take off standard;
6. the tile magnetic element will do not magnetized product concave surface to be measured is placed on leveling board upward, and the two ends, left and right of product to be measured are positioned on datum line, and product to be measured is applied to magnetic field vertically downward;
7. detect an end that product to be measured the is upturned height with respect to datum line deflection, product to be measured is compared with respect to the height of datum line deflection and the standard height with respect to datum line deflection, if product to be measured is less than the height of standard with respect to datum line deflection with respect to the height of datum line deflection, the magnetic declination of this product to be measured is qualified, otherwise defective;
6. and 7. 8. repeating step, detects the product to be measured of a batch.
Described step adopts in 4. an end that grating detection reference spare is upturned with respect to the datum line deflected height, described step 4. after described step also have the setting steps of test base before 5., be specially: the place, summit of the end be upturned at standard arranges a test base, the lower surface of described test base is that the summit of surface level and the end that is upturned with standard is positioned on a surface level, the summit of the end be upturned when product to be measured is during lower than the lower surface of described test base, mean that product to be measured is less than the height of standard with respect to datum line deflection with respect to the height of datum line deflection, when the summit of the end be upturned when product to be measured contacts with the lower surface of described test base, mean that product to be measured is greater than the height of standard with respect to datum line deflection with respect to the height of datum line deflection.
It is lower that two of technical matters to be solved by this invention is to provide a kind of cost, and the equipment be used to the magnetic declination of measuring the tile magnetic element that can detect the tile magnetic element without magnetic.Equipment be used to the magnetic declination of measuring the tile magnetic element of the present invention can be realized the full inspection of the magnetic declination of tile magnetic element, the qualification rate of the magnetic declination of the tile magnetic element guaranteed by the gross time.
The present invention solves the problems of the technologies described above the technical scheme adopted: a kind of equipment of the method be used to the magnetic declination of measuring the tile magnetic element, comprise leveling board, test base and vertically downward or the magnetic field made progress, described magnetic field be positioned at described leveling board directly over, described test base be arranged on described leveling board directly over and highly adjustable, the lower surface of described test base is surface level.
Described test base place is provided with grating and acoustic-optic alarm, described grating is connected with described acoustic-optic alarm, under magnetic fields, when an end of product to be measured is upturned while with the lower surface of described test base, contacting, described acoustic-optic alarm is reported to the police, and shows that product to be measured is defective, while after an end of product to be measured is upturned, not contacting with the lower surface of described test base, described acoustic-optic alarm is not reported to the police, and shows that product to be measured is qualified.
Compared with prior art, although the invention has the advantages that because magnetic element outside after oriented moulding under magnetic fields shows and there is no magnetic, but its inner magnetic domain has become ordered arrangement (arranging or reversed arrangement along direction of orientation or forward), now magnetic element has had paramagnetism, in the outside magnetic field environment, the direction of orientation of magnetic element can be along outer magnetic field direction in theory, keeping parallelism, but the existence due to magnetic declination, certain deflection can occur in magnetic element, in the present invention, at first pass through the height of test standard relative datum line deflection under magnetic fields, using the height of standard relative datum line deflection as test benchmark, while then under magnetic field, detecting product to be measured, product to be measured is compared to the whether qualified conclusion of magnetic declination that draws product to be measured with respect to the height of datum line deflection and standard with respect to the height of datum line deflection, simple to operate, cost is lower, and can the tile magnetic element (after oriented moulding) do not magnetized be detected, can realize the full inspection of the magnetic declination of tile magnetic element, guarantee the qualification rate of the magnetic declination of inferior by the gross tile magnetic element,
When adopting test base to judge whether product to be measured is less than standard with respect to the height of datum line deflection with respect to the height of datum line deflection, simple, intuitive;
When the test base place is provided with grating and acoustic-optic alarm, whether whether alarm contacts to determine according to product to be measured and the lower surface of test base is reported to the police, and avoids erroneous judgement disconnected, has improved accuracy of detection.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of method of the present invention;
Fig. 2 is the first structural representation of equipment of the present invention;
Fig. 3 is the second structural representation of equipment of the present invention.
Embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, the invention discloses a kind of method be used to the magnetic declination of measuring the tile magnetic element, comprise the following steps:
1. choose the tile magnetic element do not magnetized of the higher limit that a magnetic declination is acceptability limit as standard;
2. standard is placed on a leveling board of being made by non-magnet material, the concave surface of standard upward and the two ends, left and right keep level, the connecting line on the summit at two ends, left and right now is set as to datum line;
3. the magnetic field that applies directly over standard vertically downward or make progress, the left end of standard or right-hand member deflect and are upturned;
4. the end that is upturned of detection reference spare is with respect to the height of datum line deflection;
5. take off standard;
6. the tile magnetic element will do not magnetized product concave surface to be measured is placed on leveling board upward, and the two ends, left and right of product to be measured are positioned on datum line, and product to be measured is applied to magnetic field vertically downward;
7. detect an end that product to be measured the is upturned height with respect to datum line deflection, product to be measured is compared with respect to the height of datum line deflection and the standard height with respect to datum line deflection, if product to be measured is less than the height of standard with respect to datum line deflection with respect to the height of datum line deflection, the magnetic declination of this product to be measured is qualified, otherwise defective;
6. and 7. 8. repeating step, detects the product to be measured of a batch.
In method of the present invention, step adopts in 4. an end that grating detection reference spare is upturned with respect to the datum line deflected height, step 4. after step also have the setting steps of test base before 5., be specially: the place, summit of the end be upturned at standard arranges a test base, the lower surface of test base is that the summit of surface level and the end that is upturned with standard is positioned on a surface level, the summit of the end be upturned when product to be measured is during lower than the lower surface of test base, mean that product to be measured is less than the height of standard with respect to datum line deflection with respect to the height of datum line deflection, when the summit of the end be upturned when product to be measured contacts with the lower surface of test base, mean that product to be measured is greater than the height of standard with respect to datum line deflection with respect to the height of datum line deflection.
In method of the present invention, the end also can detection reference spare be upturned is with respect to the angle of datum line deflection, product to be measured is compared with respect to the angle reference spare of the datum line deflection differences in angle with respect to datum line deflection, if product to be measured is less than the angle of standard with respect to datum line deflection with respect to the angle of datum line deflection, the magnetic declination of this product to be measured is qualified, otherwise defective; The summit of the end be upturned when product to be measured is during lower than the lower surface of test base, mean that product to be measured is less than the angle of standard with respect to datum line deflection with respect to the differences in angle of datum line deflection, when the summit of the end be upturned when product to be measured contacts with the lower surface of test base, mean that product to be measured is greater than the angle of standard with respect to datum line deflection with respect to the angle of datum line deflection.
As shown in Figures 2 and 3, the invention also discloses a kind of equipment that uses above-mentioned method be used to the magnetic declination of measuring the tile magnetic element, comprise leveling board 1, test base 2 and magnetic field vertically downward 3, magnetic field 3 be positioned at leveling board 1 directly over, test base 2 be arranged on leveling board 1 directly over and highly adjustable, the lower surface of test base 2 is surface level; Test base 2 places are provided with grating (not shown) and acoustic-optic alarm 4, grating is connected with acoustic-optic alarm 4, under 3 effects of magnetic field, when an end of product 5 to be measured is upturned while with the lower surface of test base 2, contacting, acoustic-optic alarm 4 is reported to the police, and shows that product 5 to be measured is defective, while after an end of product 5 to be measured is upturned, not contacting with the lower surface of test base 2, acoustic-optic alarm 5 is not reported to the police, and shows that product to be measured is defective.In Fig. 2, magnetic field 3 is that ，Tu3Zhong magnetic field, electromagnetic type magnetic field 3 is magneto magnetic field.
Claims (4)
1. method be used to the magnetic declination of measuring the tile magnetic element is characterized in that comprising the following steps:
1. choose the tile magnetic element do not magnetized of the higher limit that a magnetic declination is acceptability limit as standard;
2. standard is placed on a leveling board of being made by non-magnet material, the concave surface of standard upward and the two ends, left and right keep level, the connecting line on the summit at two ends, left and right now is set as to datum line;
3. the magnetic field that applies directly over standard vertically downward or make progress, the left end of standard or right-hand member deflect and are upturned;
4. the end that is upturned of detection reference spare is with respect to the height of datum line deflection;
5. take off standard;
6. the tile magnetic element will do not magnetized product concave surface to be measured is placed on leveling board upward, and the two ends, left and right of product to be measured are positioned on datum line, and product to be measured is applied to magnetic field vertically downward;
7. detect an end that product to be measured the is upturned height with respect to datum line deflection, product to be measured is compared with respect to the height of datum line deflection and the standard height with respect to datum line deflection, if product to be measured is less than the height of standard with respect to datum line deflection with respect to the height of datum line deflection, the magnetic declination of this product to be measured is qualified, otherwise defective;
6. and 7. 8. repeating step, detects the product to be measured of a batch.
2. the method be used to the magnetic declination of measuring the tile magnetic element according to claim 1, it is characterized in that during described step 4. adopting an end that grating detection reference spare is upturned with respect to the datum line deflected height, described step 4. after described step also have the setting steps of test base before 5., be specially: the place, summit of the end be upturned at standard arranges a test base, the lower surface of described test base is that the summit of surface level and the end that is upturned with standard is positioned on a surface level, the summit of the end be upturned when product to be measured is during lower than the lower surface of described test base, mean that product to be measured is less than the height of standard with respect to datum line deflection with respect to the height of datum line deflection, when the summit of the end be upturned when product to be measured contacts with the lower surface of described test base, mean that product to be measured is greater than the height of standard with respect to datum line deflection with respect to the height of datum line deflection.
3. a right to use requires the equipment of 1 described method be used to the magnetic declination of measuring the tile magnetic element, it is characterized in that comprising leveling board, test base and magnetic field vertically downward, described magnetic field be positioned at described leveling board directly over, described test base be arranged on described leveling board directly over and highly adjustable, the lower surface of described test base is surface level.
4. a kind of equipment be used to the magnetic declination of measuring the tile magnetic element according to claim 3, it is characterized in that described test base place is provided with grating and acoustic-optic alarm, described grating is connected with described acoustic-optic alarm, under magnetic fields, when an end of product to be measured is upturned while with the lower surface of described test base, contacting, described acoustic-optic alarm is reported to the police, show that product to be measured is defective, while after an end of product to be measured is upturned, not contacting with the lower surface of described test base, described acoustic-optic alarm is not reported to the police, show that product to be measured is defective.
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| CN201310363283.1A CN103412267B (en) | 2013-08-20 | 2013-08-20 | For measuring the method and apparatus of the magnetic declination of tile magnetic element |
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| CN201310363283.1A CN103412267B (en) | 2013-08-20 | 2013-08-20 | For measuring the method and apparatus of the magnetic declination of tile magnetic element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526510A (en) * | 2016-11-21 | 2017-03-22 | 京磁材料科技股份有限公司 | Device and method for measuring magnetic declination of magnet part |
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| CN102411130A (en) * | 2011-12-09 | 2012-04-11 | 西南应用磁学研究所 | Device and method for measuring magnetic declination of permanent magnet |
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2013
- 2013-08-20 CN CN201310363283.1A patent/CN103412267B/en active Active
Patent Citations (7)
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| JPH0389184A (en) * | 1989-08-31 | 1991-04-15 | Alps Electric Co Ltd | Method for three-dimensionally measuring space magnetic field distribution |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106526510A (en) * | 2016-11-21 | 2017-03-22 | 京磁材料科技股份有限公司 | Device and method for measuring magnetic declination of magnet part |
| CN106526510B (en) * | 2016-11-21 | 2023-10-13 | 京磁材料科技股份有限公司 | Device and method for measuring magnetic declination of magnet part |
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Effective date of registration: 20151224 Address after: 315135, Shiqiao industrial area, Yunlong Town, Ningbo, Yinzhou District, Zhejiang Patentee after: Ningbo Canmang Technology Co., Ltd. Address before: 315135, Shiqiao industrial area, Yunlong Town, Ningbo, Yinzhou District, Zhejiang Patentee before: Huang Keke |