CN109061531A - Consider the big print rotary magnetic characteristic test system and method for vortes interference - Google Patents
Consider the big print rotary magnetic characteristic test system and method for vortes interference Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
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Abstract
The present invention is the big print rotary magnetic characteristic test system and method for considering vortes interference, including computer, capture card, tested print, composite sensing coil, two c-type magnetic yokes, level-one amplifying circuit and magnetic yoke lifting and fixing device, two c-type magnetic yokes are vertically opposite to be fixed on magnetic yoke lifting and fixing device, one c-type magnetic yoke can move up and down under the action of magnetic yoke lifting and fixing device, another c-type magnetic yoke is static on magnetic yoke lifting and fixing device；The tested print is in cross, and the size of criss-cross four arm and the supporting leg size of c-type magnetic yoke are consistent, multiple air grooves are equidistantly provided on each arm, for the width of each air groove no more than 1mm, the depth of air groove is equal with each arm lengths；The composite sensing coil includes upper layer H coil, lower layer's H coil, upper cover, lower skeleton and four B probes.The system can reduce the influence being vortexed to test result, improve the loss measurement precision of big print rotary magnetic characteristic test.
Description
Technical field
The present invention relates to two-dimensional magnetic property fields of measurement, specifically a kind of big print rotary magnetic characteristic for considering vortes interference
Test macro and method.
Background technique
Big print rotary magnetic characteristic test method is a kind of common magnetic material test method, can be used for measuring the one of material
Tie up magnetic characteristic and two-dimensional magnetic property.Moreover, big print rotary magnetic characteristic test method is by feat of homogeneous area in tested print
Greatly, convenient for applying stress the advantages that still has research.
Many papers have carried out detailed discussion to big print rotary magnetic characteristic test method, J.Sievert and
H.Ahlers et al. [Sievert J, Ahlers H, Enokizono M, et al.The measurement of
rotational power loss in electrical sheet steel using a vertical yoke system
[J] .Journal of Magnetism&Magnetic Materials, 1992,112 (1-3): 91-94.] it is revolved using big print
Turn magnetic characteristic method of testing and measure the print including various shapes such as small cross, grand cross, small square, big squares, still
Measurement result shows: for material loss characteristic with the variation of tested print relative size, minimal error is 8%, and maximum loss is missed
Difference reaches 28%, and loss fluctuation range is bigger, measures unstable.Why can bad student's so big deviation be due to not examining
The contact area considered between tested print and magnetic yoke is very big, and excessive window area makes in the region that print is contacted with cartridge
Vortex is produced, the vortex of generation causes the loss characteristic of magnetic material to test inaccuracy by the central area of tested print.
Summary of the invention
For the low problem of the loss characteristic precision of big print rotary magnetic characteristic test method measurement magnetic material, the present invention is mentioned
A kind of big print rotary magnetic characteristic test system and method for considering vortes interference is supplied, which revolves for big print
The additional eddy-current loss for turning the generation of magnetic characteristic method of testing is studied, and the influence being vortexed to test result can be reduced, and is improved big
The loss measurement precision of print rotary magnetic characteristic test.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of big print rotary magnetic characteristic test system considering vortes interference, including computer, capture card, tested print,
Composite sensing coil, two c-type magnetic yokes and level-one amplifying circuit, it is characterised in that the system further includes the fixed dress of magnetic yoke lifting
It sets, two c-type magnetic yokes are vertically opposite to be fixed on magnetic yoke lifting and fixing device, and a c-type magnetic yoke can go up and down fixed dress in magnetic yoke
It is moved up and down under the action of setting, another c-type magnetic yoke is static on magnetic yoke lifting and fixing device；
The tested print is in cross, and the size of criss-cross four arm and the supporting leg size of c-type magnetic yoke are consistent, each
Multiple air grooves are equidistantly provided on arm, the width of each air groove is no more than 1mm, the depth of air groove and each brachium
It spends equal；Two c-type magnetic yokes are vertically fixed in four arms of tested print according to upper and lower position；
The composite sensing coil includes upper layer H coil, lower layer's H coil, upper cover, lower skeleton and four B probes, upper layer H
Coil is made of upper layer Hx coil and upper layer Hy coil square crossing, and upper layer H coil is wrapped on the H coil substrate of upper layer, on
Layer H coil substrate and the lower surface center of upper layer fixed plate are fixed；
Lower layer's H coil is made of lower layer's Hx coil and lower layer Hy coil square crossing, and lower layer's H coil is wrapped in lower layer H
On coil substrate, lower layer's H coil substrate is mounted on the lower surface center of lower layer's fixed plate, while arranging four in lower layer's fixed plate
A B probe, and four perpendicular arranged crosswises of B probe, the distance at four B probes to lower layer's fixed plate center are equal, relatively
Two B probes line it is parallel with lower layer's Hx coil or lower layer's Hy coil, the two B probes parallel with lower layer's Hx coil are denoted as
By, the two B probes parallel with lower layer's Hy coil are denoted as Bx；It is solid that the welding hole of the multiple twin outlet of upper layer H coil is arranged in upper layer
On fixed board, the welding hole of the multiple twin outlet of the multiple twin outlet and B probe of lower layer's H coil is arranged in lower layer's fixed plate；
It is provided with the step for fixing upper layer fixed plate and the step for fixing lower layer's fixed plate in lower skeleton, two
There is gap between a step；B probe can stretch out the bottom surface of lower skeleton, and the lower surface of lower skeleton closely detected sample piece upper surface
Center；The top of lower skeleton covers upper cover, is fixed to upper layer fixed plate, so far constitutes entire composite sensing coil；
Composite sensing coil is fixed at the center of detected sample piece upper surface.
The big print rotary magnetic characteristic test system of discussed above vortes interference, the magnetic yoke lifting and fixing device include
Top plate and bottom plate, lead screw, polished rod, handwheel and belt fix two c-type magnetic yokes by magnetic yoke press strip respectively on top plate and bottom plate,
The opening Relative vertical arrangement of two c-type magnetic yokes, two leg portions of two c-type magnetic yokes wind field winding；Top plate and
By two screw rods and two polished rod connections between bottom plate, two screw rods and two polished rods are arranged and are supported according to diagonal
Top plate, the upper end of a lead screw pass through top plate and connect handwheel, and the upper end of another lead screw is also pierced by top plate connection belt wheel, handwheel and
It is connected between belt wheel by belt.
A kind of big print rotary magnetic characteristic test method considering vortes interference, this method use above-mentioned test macro,
The following steps are included:
Step 1: assembling composite sensing coil, tested print, c-type magnetic yoke and magnetic yoke lifting and fixing device:
The magnetic induction density B of tested print is measured using sonde method, and measurement is tested print magnetic induction density B
Inductive voltage value；B probe is made of spring probe, and four B probes perpendicular arranged crosswise centered on lower layer's fixed plate is right
The outlet of H coil and B probe carries out multiple twin；
Upper cover and lower skeleton are made, to fixed upper layer and lower layer H coil and B probe, composite sensing coil is fixed on
At the center of detected sample piece upper surface, tested print and the insulated paint of B probe contact portion are removed；It is gone up and down and is fixed by magnetic yoke
The fixed upper and lower c-type magnetic yoke of device；
Step 2: connection experimental circuit:
Excitation current is by the output end of capture card by power amplifier and corresponding water cooling electricity in the field winding of two c-type magnetic yokes
It hinders after connecting, then provided after corresponding isolating transformer；Upper layer H coil, lower layer's H coil and the B probe of composite sensing coil
Multiple twin outlet pass through shielding line and be connected on the corresponding interface of level-one amplifying circuit, the output end connection of level-one amplifying circuit
In the input terminal of capture card, the collected signal of capture card is transferred to computer, and the work of magnetic measurement virtual instrument is loaded in computer
Platform, capture card and computer carry out two-way communication；
Step 3: start to be tested:
The excited signal for controlling capture card output different frequency is adopted using magnetic measurement virtual instrument workbench control capture card
Collect Bx, By signal, and Bx, By signal is enabled to synthesize a standard circular or ellipse；Upper and lower layer H line at this time is recorded respectively
Then Hx, Hy signal of circle obtain Hx, Hy signal that linear extrapolation goes out according to Hx, Hy signal of upper and lower layer H coil respectively, then
It is post-processed, obtains BH curve, the damage curve under different magnet excitation frequencies, be finally completed the big print for considering vortes interference
Rotary magnetic feature measurement；
Step 4: change air gap parameter and compare experiment:
Screw rod rotation is driven via belt by rotation hand wheel, increases or reduce the height of top plate, top plate and upper c-type magnetic
Yoke by magnetic yoke press strip link to together, by change the distance between upper and lower c-type magnetic yoke and upper and lower c-type magnetic yoke and print it
Between air gap distance, and then obtain the magnetic characteristic under different air gap loss and hysteresis loop.
Compared with prior art, the beneficial effects of the present invention are:
(1) the composite sensing coil of present system is strong using the true field of bilayer H coil difference extrapolation measurement material
H is spent, precision is not only increased and the experimental configuration that can individually measure with upper and lower level compares, while composite sensing coil
It can be mounted on detected sample on piece as a whole, use is easier for installation；
(2) the very thin air groove of multiple tracks is outputed on each arm of the tested print of present system, for cutting off tested print
The vortex generated with cartridge contact area, and then the measuring accuracy of material loss characteristic can be significantly improved, and detected sample chip size
When changing, loss fluctuation is smaller, measures more stable；
(3) for the present invention when measuring magnetic induction intensity, using sonde method rather than coil method measures magnetic induction intensity, keeps away
Exempt to deform during the hole of detected sample on piece is in applied force, damages induction coil；Compared with induction coil method, this method subtracts
Small influence of the edge effect to measuring accuracy, keeps test zone magnetic field more uniform, and can be to avoid caused by because of punching
The destruction of material magnetic characteristic；
(4) present invention is while measure material magnetic characteristic, it is contemplated that is vortexed to generating in material magnetic characteristic measurement process
Extraneous turbulence loss, compared to vortes interference is not considered, improve measurement accuracy；
(5) the method for the present invention can adjust the distance between magnetic yoke and tested print by rotation hand wheel, to change
Gas length can be used to discuss the influence for the material magnetic characteristic that the distance between magnetic yoke and tested print obtain measurement.
Detailed description of the invention:
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the present invention looks up structural representation of the upper layer H coil and upper layer fixed plate in the present invention；
Fig. 2 is the present invention looks up structural representation of lower layer's H coil in the present invention, B probe and lower layer's fixed plate；
Fig. 3 be the present invention in upper layer H coil, lower layer's H coil relative position structural schematic diagram；
Fig. 4 is the structural schematic diagram of the tested print in the present invention；
Fig. 5 be in the present invention be used to install, the separated knot of the upper cover 14 of lower layer's H coil and B probe and lower skeleton 15
Structure schematic diagram；
Fig. 6 is the sectional view of composite sensing coil in the present invention；
Fig. 7 is the mounting structure schematic diagram of magnetic yoke lifting and fixing device in the present invention；
Fig. 8 is the circuit connection diagram for the big print rotary magnetic characteristic test system that the present invention considers vortes interference；
Fig. 9 is the current density simulation result opened air groove in embodiment 1 and do not open certain test point in the case of air groove slot
Figure.
Description of symbols:
1. upper layer Hx coil, 2. upper layer Hy coils, 3. lower layer's Hx coils, 4. lower layer's Hy coils, 5. the oneth B probes, 6.
Two B probes, 7. the 3rd B probes, 8. the 4th B probes, 9. upper layer H coil substrates, 10. lower layer's H coil substrates, 11. upper layers are fixed
Plate, 12. lower layer's fixed plates, 13. twisted pairs, 14. upper covers, 15. lower skeletons, 16. tested prints, 17. magnetic yoke press strips, c-type on 18.
Magnetic yoke, 19. lower c-type magnetic yokes, c-type magnetic yoke field winding on 20., 21. lower c-type magnetic yoke field windings, 22. top plates, 23. bottom plates,
24 backplanes supports, 25. screw rods, 26. polished rods, 27. handwheels, 28. belts, 29. level-one amplifying circuits, 30. capture cards, 31. magnetic surveys
Measure virtual instrument workbench, 32. power amplifiers, 33. water-cooled resistances, 34. isolating transformers.
Specific embodiment
Below in conjunction with attached drawing of the invention, technical solution of the present invention is clearly and completely described, it is clear that institute
The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work, belongs to the present invention
The range of protection.
The present invention considers that (abbreviation system includes referring to Fig. 1-8) for the big print rotary magnetic characteristic test system of vortes interference
Computer, capture card 30, tested print 16, composite sensing coil, two c-type magnetic yokes, magnetic yoke lifting and fixing device, level-one amplification electricity
Road, two c-type magnetic yokes are vertically opposite to be fixed on magnetic yoke lifting and fixing device, and a c-type magnetic yoke can go up and down fixed dress in magnetic yoke
It is moved up and down under the action of setting, another c-type magnetic yoke is static on magnetic yoke lifting and fixing device；
The tested print is in cross, and the size of criss-cross four arm and the supporting leg size of c-type magnetic yoke are consistent, each
Multiple air grooves are equidistantly provided on arm, the width of each air groove is no more than 1mm, the depth of air groove and each brachium
Spend it is equal, this shape can will vortex closed circuit cutting；Two c-type magnetic yokes are vertically fixed on tested print according to upper and lower position
Four arms on；
The composite sensing coil includes upper layer H coil, lower layer's H coil, upper cover, lower skeleton and four B probes, upper layer H
Coil is made of upper layer Hx coil 1 and 2 square crossing of upper layer Hy coil, and upper layer H coil is wrapped on upper layer H coil substrate 9,
Upper layer H coil substrate 9 and the lower surface center of upper layer fixed plate 11 are fixed；
Lower layer's H coil is made of lower layer's Hx coil 3 and 4 square crossing of lower layer's Hy coil, and lower layer's H coil is wrapped in lower layer
On H coil substrate 10, lower layer's H coil substrate 10 is mounted on the lower surface center of lower layer's fixed plate 12, while in lower layer's fixed plate
Four B probes of upper arrangement, and four perpendicular arranged crosswises of B probe, the distance at four B probes to 12 center of lower layer's fixed plate are equal
Equal, the lines of two opposite B probes is parallel with lower layer Hx coil 3 or lower layer's Hy coil, and parallel with lower layer's Hx coil 3 two
A B probe is denoted as By, and the two B probes parallel with lower layer's Hy coil 4 are denoted as Bx；The welding hole of the multiple twin outlet of upper layer H coil
It is arranged in the fixed plate of upper layer, it is solid that the welding hole of the multiple twin outlet of the multiple twin outlet and B probe of lower layer's H coil is arranged in lower layer
On fixed board；
The lower skeleton is cuboid cavity, and the step and use for fixing upper layer fixed plate 11 are provided in lower skeleton
There is gap between the step of fixed lower layer's fixed plate 12, two steps；B probe can stretch out the bottom surface of lower skeleton, and sending down the fishbone
The lower surface of frame closely detected sample on piece centre of surface；The top of lower skeleton covers upper cover, and upper layer fixed plate 11 is fixed,
So far entire composite sensing coil is constituted；
Composite sensing coil is fixed at the center of detected sample piece upper surface；
The multiple twin outlet of composite sensing coil is both connected on the corresponding interface of level-one amplifying circuit, level-one amplifying circuit
Output end be connected to the respective input of capture card 30, capture card connects computer simultaneously, and it is virtual that magnetic measurement is loaded in computer
Instrument workbench 31, capture card and computer carry out two-way communication, and the output end of the capture card is by power amplifier 32 and corresponding water
Cold resistance 33 is connected, then is connected on a pair of of field winding of c-type magnetic yoke through corresponding isolating transformer 34.
It includes top plate 22, bottom plate 23, lead screw that present system, which is further characterized by the magnetic yoke lifting and fixing device,
25, polished rod 26, handwheel 27 and belt 28 fix two c-type magnetic yokes by magnetic yoke press strip 17 respectively on top plate and bottom plate, and two
The opening Relative vertical of c-type magnetic yoke arranges that two leg portions of two c-type magnetic yokes wind field winding；Top plate and bottom plate
Between connected by two screw rods 25 and two polished rods 26, two screw rods 25 and two polished rods 26 arrange branch according to diagonal
Support plate, the upper end of a lead screw 25 pass through top plate and connect handwheel 27, and the upper end of another lead screw is also pierced by top plate connection belt wheel,
It is connected between handwheel 27 and belt wheel by belt 28；By rotation hand wheel 27 via belt 28 drive screw rod rotation, increase or
Reduce the height of top plate 22, top plate 22 and upper c-type magnetic yoke 18 are connected together by magnetic yoke press strip 17, can so change it is upper,
Air gap distance between the distance between lower c-type magnetic yoke and upper and lower c-type magnetic yoke and tested print.
Present system be further characterized by detected sample on piece air groove width be 0.2~0.4mm, can guarantee by
The intensity of test sample piece, and then can guarantee the progress of subsequent stress test.
It is 3-5mm that present system, which is further characterized by the distance between upper layer H coil and lower layer H coil, at this
In range, H coil is in the range of linearity, and test result is more accurate, and the setting of the distance is related with manufacture craft, two coils
The distance between be more closer better, but since H coil inherently has certain thickness, this adds increased between H coil
Distance.
The present invention also protects a kind of big print rotary magnetic characteristic test method for considering vortes interference, and this method is using above-mentioned
Test macro, comprising the following steps:
Step 1: assembling composite sensing coil, tested print, c-type magnetic yoke and magnetic yoke lifting and fixing device:
The magnetic induction density B of tested print is measured using sonde method, and measurement is tested print magnetic induction density B
Inductive voltage value；B probe is made of spring probe, and four B probes perpendicular arranged crosswise centered on lower layer's fixed plate is right
The outlet of H coil and B probe carries out multiple twin；
Upper cover and lower skeleton are made, to fixed upper layer and lower layer H coil and B probe, composite sensing coil is fixed on
At the center of detected sample piece upper surface, tested print and the insulated paint of B probe contact portion are removed；
Step 2: connection experimental circuit:
Excitation current is by the output end of capture card 30 by power amplifier 32 and corresponding water in upper and lower c-type magnetic yoke field winding
After cold resistance 33 is connected, then provide after corresponding isolating transformer 34；Upper layer H coil, the lower layer's H coil of composite sensing coil
Multiple twin outlet with B probe passes through shielding line and is connected on the corresponding interface of level-one amplifying circuit 29, level-one amplifying circuit
Output end is connected to the input terminal of capture card, and the collected signal of capture card is transferred to computer, and it is empty that magnetic measurement is loaded in computer
Quasi- instrument workbench 31, capture card and computer carry out two-way communication；
Step 3: start to be tested:
The excited signal for controlling capture card output different frequency is adopted using magnetic measurement virtual instrument workbench control capture card
Collect Bx, By signal, and Bx, By signal is enabled to synthesize a standard circular or ellipse (lissajous figures)；It records respectively at this time
Upper and lower layer H coil Hx, Hy signal, then respectively according to Hx, Hy signal of upper and lower layer H coil obtain linear extrapolation go out
Hx, Hy signal, then post-processed, BH curve, the damage curve under different magnet excitation frequencies are obtained, consideration vortex is finally completed
The big print rotary magnetic feature measurement influenced；
Step 4: change air gap parameter and compare experiment:
Air gap needs detailed research as a key factor for influencing big print rotary magnetic characteristic test method；Production
For fixing the magnetic yoke lifting and fixing device of upper and lower c-type magnetic yoke, as shown in fig. 7, by rotation hand wheel 27 via 28 band of belt
Dynamic screw rod rotation, increases or reduces the height of top plate 22, top plate 22 and upper c-type magnetic yoke 18 by magnetic yoke press strip 17 and be connected to one
It rises, can so change the air gap distance between the distance between upper and lower c-type magnetic yoke and upper and lower c-type magnetic yoke and print, in turn
Obtain magnetic characteristic loss and the hysteresis loop under different air gap.
Embodiment 1
The present embodiment considers the big print rotary magnetic characteristic test system of vortes interference, including computer, capture card 30, tested
Print 16, composite sensing coil, two c-type magnetic yokes, level-one amplifying circuit, magnetic yoke lifting and fixing device, two c-type magnetic yokes are vertical
It is relatively fixed that a c-type magnetic yoke can move up and down under the action of magnetic yoke lifting and fixing device on magnetic yoke lifting and fixing device,
Another c-type magnetic yoke is static on magnetic yoke lifting and fixing device；
The tested print is in cross, and the size of criss-cross four arm and the supporting leg size of c-type magnetic yoke are consistent, each
Multiple air grooves are equidistantly provided on arm, the width of each air groove is no more than 1mm, the depth of air groove and each brachium
It spends equal；Two c-type magnetic yokes are vertically fixed in four arms of tested print according to upper and lower position；
The composite sensing coil includes upper layer H coil, lower layer's H coil, upper cover, lower skeleton and four B probes, upper layer H
Coil is made of upper layer Hx coil 1 and 2 square crossing of upper layer Hy coil, and upper layer H coil is wrapped on upper layer H coil substrate 9,
Upper layer H coil substrate 9 and the lower surface center of upper layer fixed plate 11 are fixed；
Lower layer's H coil is made of lower layer's Hx coil 3 and 4 square crossing of lower layer's Hy coil, and lower layer's H coil is wrapped in lower layer
On H coil substrate 10, lower layer's H coil substrate 10 is mounted on the lower surface center of lower layer's fixed plate 12, while in lower layer's fixed plate
Four B probes of upper arrangement, and four perpendicular arranged crosswises of B probe, the distance at four B probes to 12 center of lower layer's fixed plate are equal
Equal, the lines of two opposite B probes is parallel with lower layer Hx coil 3 or lower layer's Hy coil, and parallel with lower layer's Hx coil 3 two
A B probe is denoted as By, and the two B probes parallel with lower layer's Hy coil 4 are denoted as Bx；The welding hole of the multiple twin outlet of upper layer H coil
It is arranged in the fixed plate of upper layer, it is solid that the welding hole of the multiple twin outlet of the multiple twin outlet and B probe of lower layer's H coil is arranged in lower layer
On fixed board；
The step for fixing upper layer fixed plate 11 and the platform for fixing lower layer's fixed plate 12 are provided in lower skeleton
Rank has gap between two steps；B probe can stretch out the bottom surface of lower skeleton, and the lower surface of lower skeleton is closely tested print
Upper surface center；The top of lower skeleton covers upper cover, is fixed to upper layer fixed plate 11, so far constitutes entire composite sensing line
Circle；
Composite sensing coil is fixed at the center of detected sample piece upper surface；
The magnetic yoke lifting and fixing device includes top plate 22, bottom plate 23, lead screw 25, polished rod 26, handwheel 27 and belt 28,
Two c-type magnetic yokes are fixed by magnetic yoke press strip 17 respectively on top plate and bottom plate, the opening Relative vertical of two c-type magnetic yokes is arranged,
Two leg portions of two c-type magnetic yokes wind field winding；Pass through two screw rods 25 and two light between top plate and bottom plate
Bar 26 connects, and two screw rods 25 and two polished rods 26 are according to diagonal arrangement and roof supporting, the upper end of a lead screw 25
Handwheel 27 is connected across top plate, the upper end of another lead screw is also pierced by top plate connection belt wheel, passes through skin between handwheel 27 and belt wheel
Band 28 connects.
The big print rotary magnetic characteristic test method of the present embodiment consideration vortes interference, comprising the following steps:
Step 1: assembling composite sensing coil, tested print, c-type magnetic yoke and magnetic yoke lifting and fixing device:
Tested print 16 is cross shape, selects detected sample chip size for width 100mm, length 150mm, the length of four arms
Degree is 25mm；For vortex cut-off to the greatest extent, three air grooves are equidistantly positioned on each arm, air groove width is 0.4mm, length
For 25mm；
H coil uses double-layer structure, is individually positioned in the position apart from print 3mm and 7mm, upper layer H coil and lower layer's H line
Circle is all made of square crossing structure, and then measures tested print Surface field intensity H using linear extrapolation；The magnetic of tested print
Induction B is measured using spring probe method, and measurement is the inductive voltage value for being tested print magnetic induction density B；Four B
Probe perpendicular arranged crosswise centered on lower layer's fixed plate carries out multiple twin to the outlet of H coil and B probe；
Specific manufacturing process is: upper and lower layer H coil is all the H coil substrate that a Hx coil is wrapped in 0.3mm thickness
On, then a Hy coil covered in Hx coil outer, the diameter of Hx coil is smaller compared with the diameter of Hy coil, is respectively used for measuring two
The H induced voltage numerical value in a direction；H coil substrate four corners band is jagged, can reduce the squeezing mill of Hx coil and Hy coil
Damage；
It is mounted on 4 pieces of B probes are orthogonal on lower layer's H coil substrate, each probe location is in lower layer's H coil substrate
Heart 10mm；Lower layer's H coil substrate is fixed with lower layer H coil again.Multiple twin is carried out to the outlet of H coil and B probe, H coil is double
The welding hole for twisting out line and B probe multiple twin outlet is located on lower layer's H coil substrate, and welding hole is easily distinguishable in line with facilitating outlet
Different welding holes reduces the principle of mutual influence to be configured, reduces come from another side to the full extent
The interference in upward magnetic field；
The step for fixing upper layer fixed plate 11 and the platform for fixing lower layer's fixed plate 12 are provided in lower skeleton
Rank has gap between two steps；B probe can stretch out the bottom surface of lower skeleton, and the lower surface of lower skeleton is closely tested print
Upper surface center；The top of lower skeleton covers upper cover, is fixed to upper layer fixed plate 11, so far constitutes entire composite sensing line
Circle；Composite sensing coil is fixed at the center on 16 surface of detected sample on piece, the exhausted of tested print and B probe contact portion
Edge paint removes；It is respectively arranged upper c-type magnetic yoke 18 and lower c-type magnetic yoke 19 in the upper and lower surface of tested print, and two c-type magnetic yokes are hung down
Straight to place, the opening of c-type is opposite；Two c-type magnetic yokes wind respectively c-type magnetic yoke field winding 20 and lower c-type magnetic yoke excitation around
Group 21；Pass through the fixed upper and lower c-type magnetic yoke of magnetic yoke lifting and fixing device；
Upper and lower c-type magnetic yoke is fixed on top plate and bottom plate respectively by magnetic yoke press strip, passes through silk between top plate and bottom plate
Bar is connected with polished rod；Screw rod rotation is driven via belt by rotation hand wheel, increases or reduce the height of top plate, top plate and upper
C-type magnetic yoke, to together, can so change the distance between upper and lower c-type magnetic yoke and upper and lower c-type magnetic by magnetic yoke press strip link
Air gap distance between yoke and print；
Step 2: connection experimental circuit:
Excitation current is by the output end of capture card 30 by power amplifier 32 and corresponding water in upper and lower c-type magnetic yoke field winding
After cold resistance 33 is connected, then provide after corresponding isolating transformer 34；The multiple twin outlet of composite sensing coil passes through shielding line
It is connected on the corresponding interface of level-one amplifying circuit 29, the output end of level-one amplifying circuit is connected to the input terminal of capture card, adopts
The collected signal of truck is transferred to computer, loads magnetic measurement virtual instrument workbench 31 in computer, capture card and computer into
Row two-way communication；
Step 3: start to be tested:
The excited signal for controlling capture card output different frequency is adopted using magnetic measurement virtual instrument workbench control capture card
Collect Bx, By signal, and Bx, By signal is enabled to synthesize a standard circular；Hx, Hy letter of upper and lower layer H coil at this time are recorded respectively
Number, Hx, Hy signal that linear extrapolation goes out then are obtained according to Hx, Hy signal of upper and lower layer H coil respectively, then post-processed,
BH curve, the damage curve under different magnet excitation frequencies are obtained, is finally completed and considers that the big print rotary magnetic characteristic of vortes interference is surveyed
Amount；
Step 4: change air gap parameter and compare experiment:
Air gap needs detailed research as a key factor for influencing big print rotary magnetic characteristic test method；Production
Upper and lower c-type magnetic yoke lifting and fixing device is as shown in Figure 7；Screw rod rotation is driven via belt 28 by rotation hand wheel 27, is increased
Or the height of top plate 22, top plate 22 and upper c-type magnetic yoke 18 are reduced by magnetic yoke press strip link to together, can so it change
Air gap distance between the distance between upper and lower c-type magnetic yoke and upper and lower c-type magnetic yoke and print；And then it obtains under different air gap
Magnetic characteristic loss and hysteresis loop.
The structural schematic diagram of tested print 16, as shown in Figure 4；Parametric method is used using Ansys Mexwell software
Emulation experiment is carried out to tested print and seeks the present embodiment in the optional test point of the corresponding detected sample on piece of lower layer's H coil
Tested print opens the current density of the point in the case of air groove, at the same with the tested print for not opening air groove of identical size into
Row comparative experiments, Fig. 9 are out air groove and do not open the current density simulation result of the point in the case of air groove slot.
It can be seen in figure 9 that can significantly reduce the current density of the point in the case where the present embodiment opens air groove,
The vortex for thereby reducing detected sample on piece improves the loss precision of tested print measurement.
The present invention does not address place and is suitable for the prior art.
Claims (6)
1. a kind of big print rotary magnetic characteristic test system for considering vortes interference, including it is computer, capture card, tested print, multiple
Close sensor coil, two c-type magnetic yokes and level-one amplifying circuit, it is characterised in that the system further includes magnetic yoke lifting and fixing device,
Two c-type magnetic yokes are vertically opposite to be fixed on magnetic yoke lifting and fixing device, and a c-type magnetic yoke can be in magnetic yoke lifting and fixing device
It is moved up and down under effect, another c-type magnetic yoke is static on magnetic yoke lifting and fixing device；
The tested print is in cross, and the size of criss-cross four arm and the supporting leg size of c-type magnetic yoke are consistent, on each arm
Multiple air grooves are equidistantly provided with, the width of each air groove is no more than 1mm, the depth of air groove and each arm lengths phase
Deng；Two c-type magnetic yokes are vertically fixed in four arms of tested print according to upper and lower position；
The composite sensing coil includes upper layer H coil, lower layer's H coil, upper cover, lower skeleton and four B probes, upper layer H coil
It is made of upper layer Hx coil and upper layer Hy coil square crossing, and upper layer H coil is wrapped on the H coil substrate of upper layer, upper layer H line
Cycle basis plate and the lower surface center of upper layer fixed plate are fixed；
Lower layer's H coil is made of lower layer's Hx coil and lower layer Hy coil square crossing, and lower layer's H coil is wrapped in lower layer's H coil
On substrate, lower layer's H coil substrate is mounted on the lower surface center of lower layer's fixed plate, while four B are arranged in lower layer's fixed plate
Probe, and four perpendicular arranged crosswises of B probe, the distance at four B probes to lower layer's fixed plate center are equal, opposite two
The line of a B probe is parallel with lower layer's Hx coil or lower layer's Hy coil, and the two B probes parallel with lower layer's Hx coil are denoted as By,
The two B probes parallel with lower layer's Hy coil are denoted as Bx；The welding hole of the multiple twin outlet of upper layer H coil is arranged in upper layer fixed plate
On, the welding hole of the multiple twin outlet of the multiple twin outlet and B probe of lower layer's H coil is arranged in lower layer's fixed plate；
The step for fixing upper layer fixed plate and the step for fixing lower layer's fixed plate, two platforms are provided in lower skeleton
There is gap between rank；B probe can stretch out the bottom surface of lower skeleton, and the lower surface of lower skeleton is closely in detected sample piece upper surface
The heart；The top of lower skeleton covers upper cover, is fixed to upper layer fixed plate, so far constitutes entire composite sensing coil；
Composite sensing coil is fixed at the center of detected sample piece upper surface.
2. the big print rotary magnetic characteristic test system according to claim 1 for considering vortes interference, which is characterized in that institute
Stating magnetic yoke lifting and fixing device includes top plate and bottom plate, lead screw, polished rod, handwheel and belt, passes through magnetic respectively on top plate and bottom plate
Yoke press strip fixes two c-type magnetic yokes, the opening Relative vertical arrangement of two c-type magnetic yokes, two leg portions of two c-type magnetic yokes
Wind field winding；By two screw rods and two polished rod connections between top plate and bottom plate, two screw rods and two polished rods are pressed
According to diagonal arrangement and roof supporting, the upper end of a lead screw passes through top plate and connects handwheel, the upper end of another lead screw
It is pierced by top plate connection belt wheel, is connected between handwheel and belt wheel by belt.
3. the big print rotary magnetic characteristic test system according to claim 1 for considering vortes interference, which is characterized in that quilt
The width of test sample on piece air groove is 0.2~0.4mm.
4. the big print rotary magnetic characteristic test system according to claim 1 for considering vortes interference, which is characterized in that on
Layer the distance between H coil and lower layer H coil are 3-5mm.
5. the big print rotary magnetic characteristic test system according to claim 1 for considering vortes interference, which is characterized in that institute
Stating lower skeleton is cuboid cavity.
6. a kind of big print rotary magnetic characteristic test method for considering vortes interference, this method use survey as claimed in claim 2
Test system, comprising the following steps:
Step 1: assembling composite sensing coil, tested print, c-type magnetic yoke and magnetic yoke lifting and fixing device:
The magnetic induction density B of tested print is measured using sonde method, and measurement is the induction for being tested print magnetic induction density B
Voltage value；B probe is made of spring probe, four B probes perpendicular arranged crosswise centered on lower layer's fixed plate, to H line
The outlet of circle and B probe carries out multiple twin；
Upper cover and lower skeleton are made, to fixed upper layer and lower layer H coil and B probe, composite sensing coil is fixed on tested
At the center of print upper surface, tested print and the insulated paint of B probe contact portion are removed；Pass through magnetic yoke lifting and fixing device
Fixed upper and lower c-type magnetic yoke；
Step 2: connection experimental circuit:
Excitation current is by the output end of capture card by power amplifier and corresponding water-cooled resistance string in the field winding of two c-type magnetic yokes
After connection, then provide after corresponding isolating transformer；The upper layer H coil of composite sensing coil, lower layer's H coil and B probe it is double
It twists out line and passes through shielding line and be connected on the corresponding interface of level-one amplifying circuit, the output end of level-one amplifying circuit, which is connected to, to be adopted
The input terminal of truck, the collected signal of capture card are transferred to computer, and magnetic measurement virtual instrument workbench is loaded in computer, is adopted
Truck and computer carry out two-way communication；
Step 3: start to be tested:
The excited signal for controlling capture card output different frequency is acquired using magnetic measurement virtual instrument workbench control capture card
Bx, By signal, and Bx, By signal is enabled to synthesize a standard circular or ellipse；Upper and lower layer H coil at this time is recorded respectively
Hx, Hy signal, then respectively according to Hx, Hy signal of upper and lower layer H coil obtain linear extrapolation go out Hx, Hy signal, then into
Row post-processing, obtains BH curve, the damage curve under different magnet excitation frequencies, is finally completed the big print rotation for considering vortes interference
Turn magnetic characteristic measurement；
Step 4: change air gap parameter and compare experiment:
Screw rod rotation is driven via belt by rotation hand wheel, increases or reduce the height of top plate, top plate and upper c-type magnetic yoke are logical
Magnetic yoke press strip link is crossed to together, by changing between the distance between upper and lower c-type magnetic yoke and upper and lower c-type magnetic yoke and print
Air gap distance, and then obtain the loss of the magnetic characteristic under different air gap and hysteresis loop.
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