CN209979829U - One-dimensional and two-dimensional high-low frequency magnetic characteristic measuring system - Google Patents
One-dimensional and two-dimensional high-low frequency magnetic characteristic measuring system Download PDFInfo
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- CN209979829U CN209979829U CN201920564690.1U CN201920564690U CN209979829U CN 209979829 U CN209979829 U CN 209979829U CN 201920564690 U CN201920564690 U CN 201920564690U CN 209979829 U CN209979829 U CN 209979829U
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Abstract
The utility model discloses a one-dimensional and two-dimensional high-low frequency magnetic characteristic measuring system, which comprises a B-H composite coil, a power amplifier, a signal amplifier, a water-cooling resistor, a capacitance box, a signal generation collector, a one-dimensional and two-dimensional high-low frequency magnetic characteristic measuring device and a testing platform; the measuring device comprises a bottom plate, an upper magnet yoke clamping plate, a lower magnet yoke clamping plate, an upper magnet yoke top plate, a left magnet yoke clamping plate, a right magnet yoke clamping plate, a left front clamping plate, a right front clamping plate, a C-shaped upper magnet yoke, a C-shaped lower magnet yoke, a C-shaped left magnet yoke, a C-shaped right magnet yoke, an exciting coil and a sample plate; the bottom plate of this device is provided with the slide rail, through the slip of slide rail around left yoke splint, right yoke splint, left side front and back splint, right side front and back splint and C shape left yoke and C shape right yoke to in the rigidity in suitable position, realize that this device can carry out one-dimensional magnetic characteristic measurement and two-dimentional magnetic characteristic measurement and can freely change, realize integrative multi-purpose.
Description
Technical Field
The utility model relates to a magnetic properties measurement field specifically is a high low frequency magnetic properties measurement system of one-dimensional and two-dimentional.
Background
The magnetic characteristic measuring system mainly comprises an excitation system, a sensing system, a data processing system and a magnetic characteristic measuring device. The excitation system is used for generating various magnetic fields in the sample wafer to be tested through excitation treatment on the magnet yoke; the sensing system collects electric signals through a B-H composite coil attached to the surface of a sample wafer to be measured, and most of the sensing systems collect voltage signals at present; the data processing system automatically generates the measurement data into a hysteresis loop through various programs, so as to obtain the magnetic characteristics and various losses of the sample to be measured. At present, a more general magnetic characteristic measuring device is used for measuring the magnetic characteristic of a one-dimensional magnetic ring and the magnetic characteristic of a two-dimensional C-shaped magnetic yoke, and different magnetic fields are generated by applying various types of current to coils wound on the magnetic yoke, so that the magnetic characteristic and various losses of a magnetic material are obtained.
Most of the traditional magnetic characteristic measuring devices can only measure the magnetic characteristics under low frequency (below 10 kHz), because the magnetic yoke made of silicon steel sheets is used as a magnetic circuit, under high frequency, the silicon steel sheets have poor characteristics, heat is serious, loss is large, the required magnetic induction intensity is not easy to reach when excitation is caused, and the accuracy of the measured magnetic characteristics is reduced. At present, an excitation coil is wound near a pole head, so that the excitation effect is optimal, but when excitation is carried out at high frequency, because the distance between two excitation coils is too close, the influence of proximity effect and distributed capacitance can occur, the excitation effect is not ideal, and the accuracy of the magnetic property of a measured material is reduced. The traditional magnetic characteristic measuring device can only be used for single measurement, namely, the one-dimensional magnetic measuring device can only carry out one-dimensional magnetic characteristic measurement, the two-dimensional device can only carry out two-dimensional magnetic characteristic measurement, the function of 'one-body multi-purpose' is not provided, and the problem of difficult sample changing exists simultaneously.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a one-dimensional and two-dimensional high-low frequency magnetic characteristic measurement system.
The technical scheme of the utility model for solving the technical problems is to provide a one-dimensional and two-dimensional high-low frequency magnetic characteristic measuring system, which comprises a B-H composite coil, a power amplifier, a signal amplifier, a water-cooling resistor, a capacitance box, a signal generation collector and a test platform; the signal generation collector is respectively connected with the test platform, the signal amplifier and the power amplifier; the B-H composite coil is connected with a signal amplifier; the water-cooling resistor is respectively connected with the positive electrode end of the power amplifier and the capacitor box; the measuring system is characterized by also comprising one-dimensional and two-dimensional high-low frequency magnetic characteristic measuring devices;
the measuring device comprises a bottom plate, an upper magnet yoke clamping plate, a lower magnet yoke clamping plate, an upper magnet yoke top plate, a left magnet yoke clamping plate, a right magnet yoke clamping plate, a left front clamping plate, a right front clamping plate, a C-shaped upper magnet yoke, a C-shaped lower magnet yoke, a C-shaped left magnet yoke, a C-shaped right magnet yoke, an excitation coil and a sample plate;
excitation coils are wound on the same positions of the C-shaped upper magnetic yoke, the C-shaped lower magnetic yoke, the C-shaped left magnetic yoke and the C-shaped right magnetic yoke; two ends of the exciting coil are respectively connected with the capacitance box and the negative end of the power amplifier; the two upper and lower magnetic yoke clamping plates are fixed on the bottom plate; two short edges of the C-shaped upper magnetic yoke and the C-shaped lower magnetic yoke are respectively fixed on the two upper and lower magnetic yoke clamping plates; the long edge of the C-shaped lower magnetic yoke is fixed on the bottom plate, and the long edge of the C-shaped upper magnetic yoke is fixed on the top plate of the upper magnetic yoke; the left end and the right end of the upper magnetic yoke top plate are respectively fixedly connected with the two upper magnetic yoke clamping plates and the two lower magnetic yoke clamping plates; the pole heads of the C-shaped upper magnetic yoke and the C-shaped lower magnetic yoke are fixedly combined; the sample plate is fixed on the bottom plate through a sample plate support column, is positioned at the center of the pole head and is used for placing the B-H composite coil and a sample to be detected;
the front end and the rear end of the left magnet yoke clamping plate are respectively fixedly connected with the left front clamping plate and the left rear clamping plate; two short sides of the C-shaped left magnetic yoke are respectively fixed on the two left front and rear clamping plates, and a long side of the C-shaped left magnetic yoke is fixed on the left magnetic yoke clamping plate; the front end and the rear end of the right magnetic yoke clamping plate are respectively fixedly connected with the two right front clamping plates and the right rear clamping plates; two short edges of the C-shaped right magnetic yoke are respectively fixed on the two right front and rear clamping plates, and a long edge is fixed on the right magnetic yoke clamping plate;
a slide rail is fixed on the upper surface of the bottom plate; the bottoms of the left magnetic yoke clamping plate, the right magnetic yoke clamping plate, the left front and rear clamping plates and the right front and rear clamping plates are provided with sliding grooves which are matched with sliding rails on the bottom plate to realize free sliding; when two-dimensional magnetic characteristic measurement is carried out, the left magnetic yoke clamping plate and the right magnetic yoke clamping plate are respectively contacted with the upper magnetic yoke clamping plate and the lower magnetic yoke clamping plate; the left magnetic yoke clamping plate, the right magnetic yoke clamping plate, the left front and rear clamping plates and the right front and rear clamping plates are fixed on the bottom plate; the pole heads of the C-shaped left magnetic yoke and the C-shaped right magnetic yoke are fixedly combined; when one-dimensional magnetic property measurement is needed, the C-shaped left magnetic yoke and the C-shaped right magnetic yoke are separated, and a left magnetic yoke clamping plate, a right magnetic yoke clamping plate, a left front clamping plate, a left rear clamping plate, a right front clamping plate and a right front clamping plate are separated from the bottom plate; drag left yoke splint, right yoke splint, splint around left side, splint around the right side and C shape left magnetic yoke and C shape right magnetic yoke slide to measuring device's the left and right sides respectively along the slide rail, all be located the outside of C shape upper magnetic yoke and C shape lower magnetic yoke until the outside on C shape left magnetic yoke and the respective two utmost point head limits of C shape right magnetic yoke, fix left yoke splint, right yoke splint, splint around the left side and splint around the right side on the bottom plate again.
Compared with the prior art, the utility model discloses beneficial effect lies in:
(1) the bottom plate of this device is provided with the slide rail, through the slip of slide rail around left yoke splint, right yoke splint, left side front and back splint, right side front and back splint and C shape left yoke and C shape right yoke to in the rigidity in suitable position, realize that this device can carry out one-dimensional magnetic characteristic measurement and two-dimentional magnetic characteristic measurement and can freely change, realize integrative multi-purpose.
(2) Through structural deformation, when the system carries out one-dimensional magnetic characteristic measurement, the C-shaped left magnetic yoke and the C-shaped right magnetic yoke can not influence the magnetic flux of the C-shaped upper magnetic yoke and the C-shaped lower magnetic yoke, and the accuracy of a measurement result is realized.
(3) The device solves the problem of difficult sample changing during two-dimensional measurement. When a two-dimensional measuring sample needs to be replaced, the device can be firstly deformed into a one-dimensional measuring device, and after the sample replacement is completed, the device is deformed into a two-dimensional measuring device to be measured, and a complex mode of detaching the whole measuring device is not needed.
(4) At high frequency, the excitation coil is too close to cause the influence of proximity effect and distributed capacitance, so the system winds the excitation coil on two short sides of the magnetic yoke instead of the pole head position.
(5) The magnetic yoke is made of nanocrystalline materials. The nanocrystalline material has higher saturation permeability, lower iron core loss under high frequency, less heat generation than a silicon steel sheet, and better excitation effect under the high frequency than the silicon steel sheet, so the device can realize the measurement of the low-frequency magnetic characteristics of various materials and the high-frequency magnetic characteristics of various materials.
Drawings
Fig. 1 is a schematic view of an overall structure of an apparatus for performing two-dimensional magnetic property measurement according to an embodiment of the present invention;
fig. 2 is a partially enlarged schematic view of fig. 1 with the top plate of the upper yoke, the left front and rear clamping plates, and the right front and rear clamping plates removed;
fig. 3 is a schematic view of an overall structure of an apparatus for performing one-dimensional magnetic property measurement according to an embodiment of the present invention;
fig. 4 is a partially enlarged schematic view of fig. 3 according to the present invention;
fig. 5 is a schematic top view of a base plate according to an embodiment of the present invention;
fig. 6 is a schematic bottom view of a bottom plate according to an embodiment of the present invention;
fig. 7 is a schematic diagram of spatial positions of the C-shaped upper yoke, the C-shaped lower yoke, the C-shaped left yoke, and the C-shaped right yoke according to an embodiment of the present invention;
fig. 8 is a schematic connection diagram of a C-shaped upper yoke, a C-shaped lower yoke, a C-shaped left yoke, and a C-shaped right yoke according to an embodiment of the present invention;
fig. 9 is a schematic view of the connection between the left yoke clamp plate and the left front and rear clamp plates according to an embodiment of the present invention;
fig. 10 is a schematic view of the installation of the C-shaped upper yoke and the C-shaped lower yoke according to an embodiment of the present invention;
fig. 11 is a schematic structural view of an upper and lower yoke clamping plate according to an embodiment of the present invention;
fig. 12 is a schematic structural view of an upper yoke top plate according to an embodiment of the present invention;
fig. 13 is a schematic structural view of a left yoke clamping plate according to an embodiment of the present invention;
fig. 14 is a schematic diagram of a sample plate structure according to an embodiment of the present invention;
fig. 15 is a schematic view of a polar head clamp according to an embodiment of the present invention;
fig. 16 is a schematic block diagram of a system configuration according to an embodiment of the present invention;
in the figure: 1. a base plate; 2. an upper magnetic yoke clamping plate and a lower magnetic yoke clamping plate; 3. an upper yoke top plate; 4. a left yoke clamp plate; 5. a right yoke clamp plate; 6. a left front splint and a left rear splint; 7. a right front splint and a right rear splint; 8. a ground bracket; 9. a magnetic yoke clip; 10. A pole head clamp; 11. a wire outlet hole; 12. a slide rail; 13. a wire inlet hole; 14. a C-shaped upper yoke; 15. a C-shaped lower yoke; 16. a C-shaped left magnetic yoke; 17. a C-shaped right magnetic yoke; 18. a chute; 19. a base plate; 20. the polar head clamps the male head; 21. clamping the female head by the pole head; 22. a protruding block; 23. an exciting coil; 24. a sample plate; 25. a sample plate support post; 26. a yoke slot; 27. a coil placement groove; 28. a slide rail stop post; 29. a test platform; 30. B-H composite coil; 31. a power amplifier; 32. a signal amplifier; 33. water-cooling the resistor; 34. a capacitor box; 35. a signal generation collector;
Detailed Description
Specific embodiments of the present invention are given below. The specific embodiments are only used for further elaboration of the invention, and do not limit the scope of protection of the claims of the present application.
The utility model provides a one-dimensional and two-dimensional high-low frequency magnetic characteristic measuring system (refer to measuring system for short, see fig. 1-16), which comprises a B-H composite coil 30, a power amplifier 31, a signal amplifier 32, a water-cooling resistor 33, a capacitance box 34, a signal generation collector 35 and a test platform 29; the signal generation collector 35 is respectively connected with the test platform 29, the signal amplifier 32 and the power amplifier 31; the B-H composite coil 30 is connected with a signal amplifier 32; the water-cooled resistor 33 is respectively connected with the positive terminal of the power amplifier 31 and the capacitor box 34; the measuring system is characterized by also comprising one-dimensional and two-dimensional high-low frequency magnetic characteristic measuring devices (measuring devices for short);
the measuring device comprises a bottom plate 1, an upper magnet yoke clamping plate 2, a lower magnet yoke clamping plate 2, an upper magnet yoke top plate 3, a left magnet yoke clamping plate 4, a right magnet yoke clamping plate 5, a left front clamping plate 6, a right front clamping plate 7, a C-shaped upper magnet yoke 14, a C-shaped lower magnet yoke 15, a C-shaped left magnet yoke 16, a C-shaped right magnet yoke 17, an exciting coil 23 and a sample plate 24;
the excitation coils 23 are wound on the same positions of the C-shaped upper magnetic yoke 14, the C-shaped lower magnetic yoke 15, the C-shaped left magnetic yoke 16 and the C-shaped right magnetic yoke 17, so that the complete symmetrical arrangement of the excitation coils 23 is realized; two ends of the exciting coil 23 are respectively connected with the capacitance box 34 and the negative end of the power amplifier 31; the two upper and lower magnetic yoke clamping plates 2 are fixed on the bottom plate 1; the two short sides of the C-shaped upper magnetic yoke 14 and the C-shaped lower magnetic yoke 15 are respectively fixed on the two upper and lower magnetic yoke clamping plates 2 through the magnetic yoke clamps 9 and non-magnetic screws; the long edge of the C-shaped lower magnetic yoke 15 is fixed on the bottom plate 1 through the magnetic yoke clamp 9 and the non-magnetic screw, and the long edge of the C-shaped upper magnetic yoke 14 is fixed on the upper magnetic yoke top plate 3 through the magnetic yoke clamp 9 and the non-magnetic screw; the left end and the right end of the upper magnetic yoke top plate 3 are respectively fixedly connected with the two upper magnetic yoke clamping plates 2 and the lower magnetic yoke clamping plates 2 and are used for protecting the magnetic yokes; the pole heads of the C-shaped upper magnetic yoke 14 and the C-shaped lower magnetic yoke 15 are fixedly combined into a wedge shape through the pole head clamp 10; the sample plate support columns 25 (four in this embodiment) are fixed on the base plate 1 by non-magnetic screws, and the sample plate 24 is fixed on the sample plate support columns 25 by non-magnetic screws; the sample plate 24 is positioned at the center of the pole head and used for placing the B-H composite coil 30 and a sample to be detected;
the front end and the rear end of the left magnet yoke clamping plate 4 are respectively fixedly connected with two left front and rear clamping plates 6; two short sides of the C-shaped left magnetic yoke 16 are respectively fixed on the two left front and rear clamping plates 6 through the magnetic yoke clamp 9 and the non-magnetic screws, and a long side is fixed on the left magnetic yoke clamping plate 4 through the magnetic yoke clamp 9 and the non-magnetic screws; the front end and the rear end of the right magnetic yoke clamping plate 5 are respectively fixedly connected with two right front clamping plates and two right rear clamping plates 7; two short sides of the C-shaped right magnetic yoke 17 are respectively fixed on the two right front and rear clamping plates 7 through the magnetic yoke clamp 9 and the non-magnetic screws, and a long side is fixed on the right magnetic yoke clamping plate 5 through the magnetic yoke clamp 9 and the non-magnetic screws;
a slide rail 12 is fixed on the upper surface of the bottom plate 1; the bottoms of the left magnetic yoke clamping plate 4, the right magnetic yoke clamping plate 5, the left front and rear clamping plate 6 and the right front and rear clamping plate 7 are provided with sliding grooves 18 which are matched with sliding rails 12 on the bottom plate 1 to realize free sliding to form a sliding pair; when two-dimensional magnetic characteristic measurement is carried out, the left magnetic yoke clamping plate 4 and the right magnetic yoke clamping plate 5 are respectively contacted with the upper magnetic yoke clamping plate and the lower magnetic yoke clamping plate 2; the left magnetic yoke clamping plate 4, the right magnetic yoke clamping plate 5, the left front and rear clamping plates 6 and the right front and rear clamping plates 7 are fixed on the bottom plate 1 through non-magnetic screws; the pole heads of the C-shaped left magnetic yoke 16 and the C-shaped right magnetic yoke 17 are fixedly combined into a wedge shape through the pole head clamp 10; when one-dimensional magnetic property measurement is needed, the pole head clamps 10 on the C-shaped left magnetic yoke 16 and the C-shaped right magnetic yoke 17 are detached, the C-shaped left magnetic yoke 16 and the C-shaped right magnetic yoke 17 are separated, non-magnetic screws which connect the left magnetic yoke clamping plate 4, the right magnetic yoke clamping plate 5, the left front and back clamping plate 6 and the right front and back clamping plate 7 with the bottom plate 1 are screwed out, and the left magnetic yoke clamping plate 4, the right magnetic yoke clamping plate 5, the left front and back clamping plate 6 and the right front and back clamping plate 7 are separated from the bottom plate 1; drag left yoke splint 4, right yoke splint 5, left side front and back splint 6, right side front and back splint 7 and C shape left yoke 16 and C shape right yoke 17 and slide to measuring device's the left and right sides respectively along slide rail 12, until the outside of C shape left yoke 16 and the respective two utmost point head limits of C shape right yoke 17 all is located the outside of C shape upper yoke 14 and C shape lower yoke 15 (namely C shape left yoke 16 and C shape right yoke 17 and C shape upper yoke 14 and C shape lower yoke 15 non-intersect in the vertical plane), the rethread does not lead magnetic screw with left yoke splint 4, right yoke splint 5, left side front and back splint 6 and right side front and back splint 7 to fix on bottom plate 1.
Preferably, a slide rail stop post 28 is fixed on the upper surface of the bottom plate 1; the slide rail blocking column 28 is located at the tail end of the slide rail 12 and used for positioning and blocking, the left magnetic yoke clamping plate 4, the right magnetic yoke clamping plate 5, the left front and back clamping plate 6 and the right front and back clamping plate 7 are prevented from being separated from the slide rail 12, and when the left magnetic yoke clamping plate 4 and the right magnetic yoke clamping plate 5 slide along the slide rail 12 to reach the position of the slide rail blocking column 28, the slide rail blocking column becomes a one-dimensional magnetic characteristic measuring device, and the positioning effect is achieved.
The C-shaped upper magnetic yoke 14, the C-shaped lower magnetic yoke 15, the C-shaped left magnetic yoke 16 and the C-shaped right magnetic yoke 17 are all made of nanocrystalline materials, Nillian Finemet series. An exciting coil 23 is wound around each of the short sides of the C-shaped upper yoke 14, the C-shaped lower yoke 15, the C-shaped left yoke 16, and the C-shaped right yoke 17 at the same position.
The measuring device further comprises a ground support 8; the four bottom corners of the bottom plate 1 are fixedly connected with the four ground brackets 8 through non-magnetic screws, and the ground brackets 8 are used for supporting and heightening the bottom plate 1.
The bottom plate 1 is provided with an exciting coil outlet hole 11 and an exciting coil inlet hole 13, and the middle part of the bottom plate is provided with a magnetic yoke groove 26; the wire inlet holes 13 are four rectangular holes, the wire outlet holes 11 are sixty-four round holes, and the wire inlet holes and the wire outlet holes are symmetrically distributed on two sides of the bottom plate 1 respectively, so that the lead of the exciting coil 23 is located below the bottom plate 1, and the structure is convenient and attractive. Sixty-four exciting coil wire outlet holes can enable the exciting coils 23 to be wound in a multi-part and multi-layer mode, series connection and parallel connection are conducted on a wiring board, various exciting strategies can be provided, and the difficulty of capacitance matching under the high-frequency magnetic characteristic measurement is reduced.
The upper and lower magnetic yoke clamping plates 2 are provided with magnetic yoke grooves 26 and coil placing grooves 27, and the side surfaces are provided with small grooves for smoothly pulling out the C-shaped left magnetic yoke 16 and the C-shaped right magnetic yoke 17 without being clamped when the measuring device is changed from two-dimensional magnetic characteristic measurement to one-dimensional magnetic characteristic measurement;
the upper yoke top plate 3 is provided with a yoke groove 26;
the left magnetic yoke clamping plate 4 and the right magnetic yoke clamping plate 5 have the same structure, the bottom is provided with a sliding groove 18, the top is provided with a convex backing plate 19, the inside is provided with a magnetic yoke groove 26, and the lower part is provided with a convex block 22; the convex block 22 is used for supporting the C-shaped magnetic yoke and reducing the stress of the convex part of the magnetic yoke; when two-dimensional magnetic characteristic measurement is carried out, the backing plates 19 at the tops of the left yoke clamping plate 4 and the right yoke clamping plate 5 are respectively tightly attached to the corresponding upper and lower yoke clamping plates 2, so that the upper and lower yoke clamping plates 2 are prevented from vibrating under high frequency, and meanwhile, the positioning function is achieved.
The left front and rear clamping plates 6 and the right front and rear clamping plates 7 have the same structure, a magnetic yoke groove 26 and a coil placing groove 27 are arranged in the left front and rear clamping plates, and a sliding groove 18 is arranged at the bottom of the left front and rear clamping plates.
The magnetic yoke slot 26 is in a cuboid shape and is used for placing a magnetic yoke and reducing vibration of the magnetic yoke; the depth of the magnetic yoke groove 26 is smaller than the thickness of the C-shaped magnetic yoke, so that the C-shaped magnetic yoke is not completely embedded into the measuring device, a part of magnetic yoke is left outside the measuring device, and the phenomenon that the inner part at the corner of the fragile nanocrystalline C-shaped magnetic yoke is broken to influence the accuracy of data measurement under high-frequency measurement is prevented.
The pole head clamp 10 consists of a pole head clamp male head 20 and a pole head clamp female head 21, and the pole head clamp male head 20 and the pole head clamp female head 21 are fixedly connected through a non-magnetic conductive screw; the pole heads of the two magnetic yokes are fastened, so that gaps between the pole heads of the magnetic yokes are the same, air gaps between the pole heads are reduced, the excitation capacity is improved, and a good excitation effect is guaranteed.
The sample plate 24 is divided into three layers, the uppermost layer is used for placing the B-H composite coil 30 and a sample to be detected, and the B-H composite coil 30 is placed in the center of the sample to be detected; the middle layer is provided with two grooves for clamping a pole head formed by the C-shaped upper magnetic yoke 14 and the C-shaped lower magnetic yoke 15 and preventing the pole head from vibrating and stressed and bending under high frequency; the lowermost layer is used for being tightly attached to the pole head clamp 10 and positioning the pole head clamp 10.
The yoke clips 9 serve to prevent vibration of the four C-shaped yokes at high frequencies, reducing wear on the yokes.
The non-magnetic conductive screw can be a 304 stainless steel socket head cap screw.
The B-H composite coil 30 comprises a probe B and a sensing coil H and is used for measuring B and H voltage signals of a sample to be measured;
the model of the power amplifier 31 is INSPECTION CERTIFICATE PA100-52A, which is used for amplifying the power of the signal sent by the signal generation collector 35;
the signal amplifier 32 is used for amplifying the B and H voltage signals;
the water-cooling resistor 33 is used for protecting the measuring system and preventing the current from being overlarge;
measuring the inductance of the exciting coil 23 under the frequency, calculating the capacitance required at the moment according to a resonance formula, and matching by adopting a high-voltage-resistant capacitance box 34 to ensure that the voltage and the current have the same phase; the inductance-capacitance box 34 is used for matching the inductance of the exciting coil 23;
the signal generating and collecting unit 35 uses an NI acquisition card of type NI PXle-6368 to send out small signals and collect signals measured in the B-H composite coil 30.
The test platform 29 adopts a computer, a computer and other upper computers provided with LabVIEW software. For controlling the signal generation and acquisition unit 35 to output signals and acquire signals.
The utility model discloses a theory of operation and work flow are:
(1) installation of a measuring device:
the method comprises the following steps: two upper and lower yoke clamps 2 are fixed to the left and right sides of the bottom plate 1, the C-shaped upper yoke 14 and the C-shaped lower yoke 15 are placed in the upper and lower yoke clamps 2, the C-shaped upper yoke 14 and the C-shaped lower yoke 15 are fixed to the upper and lower yoke clamps 2, the upper yoke top plate 3 and the bottom plate 1 by the yoke clamps 9, and the upper yoke top plate 3 is fixed. The four sample plate support columns 25 and the sample plate 24 are placed and then fixedly connected to the base plate 1. The pole heads of the C-shaped upper yoke 14 and the C-shaped lower yoke 15 are fixedly combined into a wedge shape through the pole head clamp 10.
Step two: the front end and the rear end of a left magnetic yoke clamping plate 4 are respectively fixedly connected with two left front and rear clamping plates 6, and the front end and the rear end of a right magnetic yoke clamping plate 5 are respectively fixedly connected with two right front and rear clamping plates 7; the C-shaped left magnetic yoke 16 and the C-shaped right magnetic yoke 17 are placed in and fixedly connected with the magnetic yoke clamp 9.
Step three: and putting the whole obtained in the step two on a slide rail 12.
(2) After the measurement device is installed, magnetic characteristic measurement is carried out:
when two-dimensional magnetic property measurement is needed, the left magnetic yoke clamping plate 4, the right magnetic yoke clamping plate 5, the left front and back clamping plate 6 and the right front and back clamping plate 7 slide on the slide rail 12 to enable the left magnetic yoke clamping plate 4 and the right magnetic yoke clamping plate 5 to be respectively contacted with the respective upper and lower magnetic yoke clamping plates 2, and the backing plates 19 at the tops of the left magnetic yoke clamping plate 4 and the right magnetic yoke clamping plate 5 are respectively clung to the respective upper and lower magnetic yoke clamping plates 2; fixing a left magnetic yoke clamping plate 4, a right magnetic yoke clamping plate 5, a left front and back clamping plate 6 and a right front and back clamping plate 7 on the bottom plate 1 through non-magnetic screws; the pole heads of the C-shaped left magnetic yoke 16 and the C-shaped right magnetic yoke 17 are fixedly combined into a wedge shape through the pole head clamp 10, and the surface of the pole head clamp 10 is tightly attached to the sample plate 24; the sample to be measured is placed on the sample plate 24, aligned with and in contact with each pole head and located at the center of each pole head, and the B-H composite coil 30 is placed at the center of the sample to be measured.
The two-dimensional magnetic characteristic measurement is carried out, the LabVIEW software of the test platform 29 controls the signal generation collector 35 to output a small excitation signal (the excitation signal is a low-frequency signal when the low-frequency measurement is carried out, and the excitation signal is a high-frequency signal when the high-frequency measurement is carried out) to the power amplifier 31 for amplification, the signal output from the positive end of the power amplifier 31 is loaded to the excitation coil 23 through the water-cooling resistor 33 and the capacitor box 34, the sample wafer to be tested is magnetized through the four C-shaped magnetic yokes, a magnetic field is formed inside the sample wafer to be tested, and the magnetic field is output to the negative end of the power amplifier 31 from the other end of the excitation coil 23. When collecting signals, B and H voltage signals of the sample to be detected are collected through a B-H composite coil 30 attached to the surface of the sample to be detected, the signals are amplified through a signal amplifier 32 and then return to a signal generating collector 35, the signal generating collector 35 is controlled by LabVIEW software of the test platform 29 to collect the signals, and the voltage signals are processed to generate a B-H curve of the sample, so that the magnetic flux density and the magnetic field intensity of the sample to be detected are obtained.
When one-dimensional magnetic property measurement is needed, the pole head clamps 10 on the C-shaped left magnetic yoke 16 and the C-shaped right magnetic yoke 17 are detached, the C-shaped left magnetic yoke 16 and the C-shaped right magnetic yoke 17 are separated, non-magnetic screws which connect the left magnetic yoke clamping plate 4, the right magnetic yoke clamping plate 5, the left front and back clamping plate 6 and the right front and back clamping plate 7 with the bottom plate 1 are screwed out, and the left magnetic yoke clamping plate 4, the right magnetic yoke clamping plate 5, the left front and back clamping plate 6 and the right front and back clamping plate 7 are separated from the bottom plate 1; drag left yoke splint 4, right yoke splint 5, splint 6 around the left side, splint 7 around the right side and C shape left yoke 16 and C shape right yoke 17 slide to measuring device's the left and right sides respectively along slide rail 12, until the outside of C shape left yoke 16 and the respective two utmost point head limits of C shape right yoke 17 all is located the outside of C shape upper yoke 14 and C shape lower yoke 15, the rethread does not lead magnetic screw with left yoke splint 4, right yoke splint 5, splint 6 around the left side and splint 7 around the right side fix on bottom plate 1. And then, one-dimensional magnetic characteristic measurement is carried out, excitation is loaded on the excitation coils 23 of the C-shaped upper magnetic yoke 14 and the C-shaped lower magnetic yoke 15, and the measurement method is the same as the two-dimensional magnetic characteristic measurement.
The utility model discloses the nothing is mentioned the part and is applicable to prior art.
Claims (10)
1. A one-dimensional and two-dimensional high-low frequency magnetic characteristic measuring system comprises a B-H composite coil, a power amplifier, a signal amplifier, a water-cooling resistor, a capacitance box, a signal generation collector and a test platform; the signal generation collector is respectively connected with the test platform, the signal amplifier and the power amplifier; the B-H composite coil is connected with a signal amplifier; the water-cooling resistor is respectively connected with the positive electrode end of the power amplifier and the capacitor box; the measuring system is characterized by also comprising one-dimensional and two-dimensional high-low frequency magnetic characteristic measuring devices;
the measuring device comprises a bottom plate, an upper magnet yoke clamping plate, a lower magnet yoke clamping plate, an upper magnet yoke top plate, a left magnet yoke clamping plate, a right magnet yoke clamping plate, a left front clamping plate, a right front clamping plate, a C-shaped upper magnet yoke, a C-shaped lower magnet yoke, a C-shaped left magnet yoke, a C-shaped right magnet yoke, an excitation coil and a sample plate;
excitation coils are wound on the same positions of the C-shaped upper magnetic yoke, the C-shaped lower magnetic yoke, the C-shaped left magnetic yoke and the C-shaped right magnetic yoke; two ends of the exciting coil are respectively connected with the capacitance box and the negative end of the power amplifier; the two upper and lower magnetic yoke clamping plates are fixed on the bottom plate; two short edges of the C-shaped upper magnetic yoke and the C-shaped lower magnetic yoke are respectively fixed on the two upper and lower magnetic yoke clamping plates; the long edge of the C-shaped lower magnetic yoke is fixed on the bottom plate, and the long edge of the C-shaped upper magnetic yoke is fixed on the top plate of the upper magnetic yoke; the left end and the right end of the upper magnetic yoke top plate are respectively fixedly connected with the two upper magnetic yoke clamping plates and the two lower magnetic yoke clamping plates; the pole heads of the C-shaped upper magnetic yoke and the C-shaped lower magnetic yoke are fixedly combined; the sample plate is fixed on the bottom plate through a sample plate support column, is positioned at the center of the pole head and is used for placing the B-H composite coil and a sample to be detected;
the front end and the rear end of the left magnet yoke clamping plate are respectively fixedly connected with the left front clamping plate and the left rear clamping plate; two short sides of the C-shaped left magnetic yoke are respectively fixed on the two left front and rear clamping plates, and a long side of the C-shaped left magnetic yoke is fixed on the left magnetic yoke clamping plate; the front end and the rear end of the right magnetic yoke clamping plate are respectively fixedly connected with the two right front clamping plates and the right rear clamping plates; two short edges of the C-shaped right magnetic yoke are respectively fixed on the two right front and rear clamping plates, and a long edge is fixed on the right magnetic yoke clamping plate;
a slide rail is fixed on the upper surface of the bottom plate; the bottoms of the left magnetic yoke clamping plate, the right magnetic yoke clamping plate, the left front and rear clamping plates and the right front and rear clamping plates are provided with sliding grooves which are matched with sliding rails on the bottom plate to realize free sliding; when two-dimensional magnetic characteristic measurement is carried out, the left magnetic yoke clamping plate and the right magnetic yoke clamping plate are respectively contacted with the upper magnetic yoke clamping plate and the lower magnetic yoke clamping plate; the left magnetic yoke clamping plate, the right magnetic yoke clamping plate, the left front and rear clamping plates and the right front and rear clamping plates are fixed on the bottom plate; the pole heads of the C-shaped left magnetic yoke and the C-shaped right magnetic yoke are fixedly combined; when one-dimensional magnetic property measurement is needed, the C-shaped left magnetic yoke and the C-shaped right magnetic yoke are separated, and a left magnetic yoke clamping plate, a right magnetic yoke clamping plate, a left front clamping plate, a left rear clamping plate, a right front clamping plate and a right front clamping plate are separated from the bottom plate; drag left yoke splint, right yoke splint, splint around left side, splint around the right side and C shape left magnetic yoke and C shape right magnetic yoke slide to measuring device's the left and right sides respectively along the slide rail, all be located the outside of C shape upper magnetic yoke and C shape lower magnetic yoke until the outside on C shape left magnetic yoke and the respective two utmost point head limits of C shape right magnetic yoke, fix left yoke splint, right yoke splint, splint around the left side and splint around the right side on the bottom plate again.
2. The one-dimensional and two-dimensional high and low frequency magnetic property measurement system of claim 1, wherein a slide rail stop is fixed on the upper surface of the bottom plate; the slide rail stop post is positioned at the tail end of the slide rail and used for positioning and blocking.
3. The one-dimensional and two-dimensional high and low frequency magnetic property measurement system of claim 1, wherein the C-shaped upper yoke, the C-shaped lower yoke, the C-shaped left yoke and the C-shaped right yoke are made of nanocrystalline materials; and an excitation coil is wound on the same position of each short side of the C-shaped upper magnetic yoke, the C-shaped lower magnetic yoke, the C-shaped left magnetic yoke and the C-shaped right magnetic yoke.
4. The one-and two-dimensional high and low frequency magnetic property measurement system of claim 1 wherein the measurement device further comprises a ground support; the four bottom corners of the bottom plate are fixedly connected with four support frames, and the support frames are used for supporting and heightening the bottom plate.
5. The one-dimensional and two-dimensional high and low frequency magnetic characteristic measurement system according to claim 1, wherein the bottom plate is provided with an exciting coil outlet hole and an exciting coil inlet hole, and the middle part is provided with a yoke slot; a magnetic yoke groove is formed on the top plate of the upper magnetic yoke; the upper and lower magnetic yoke clamping plates are provided with magnetic yoke grooves and coil placing grooves, and the side surfaces are provided with small grooves for preventing the C-shaped left magnetic yoke and the C-shaped right magnetic yoke from being clamped when the measuring device is changed from two-dimensional magnetic characteristic measurement to one-dimensional magnetic characteristic measurement.
6. The one-dimensional and two-dimensional high and low frequency magnetic characteristic measurement system according to claim 1, wherein the left and right yoke plates have the same structure, the bottom is provided with a sliding groove, the top is provided with a convex backing plate, the inside is provided with a yoke groove, and the lower part is provided with a convex block; the convex block is used for supporting the C-shaped magnetic yoke; when two-dimensional magnetic characteristic measurement is carried out, the backing plates at the tops of the left magnetic yoke clamping plate and the right magnetic yoke clamping plate are respectively tightly attached to the upper magnetic yoke clamping plate and the lower magnetic yoke clamping plate.
7. The one-dimensional and two-dimensional high and low frequency magnetic characteristic measurement system according to claim 1, wherein the left front and rear clamping plates and the right front and rear clamping plates have the same structure, a yoke slot and a coil placement slot are formed in the inner part, and a sliding slot is formed at the bottom.
8. A one and two dimensional high and low frequency magnetic property measurement system according to any of claims 5-7 wherein the depth of the yoke slot is less than the thickness of the C-shaped yoke so that the C-shaped yoke leaves a portion of the yoke outside the device.
9. The one-dimensional and two-dimensional high and low frequency magnetic characteristic measurement system according to claim 1, wherein the pole heads of the C-shaped upper yoke and the C-shaped lower yoke are fixedly combined by a pole head clamp; the pole head clamp comprises a pole head clamp male head and a pole head clamp female head, and the pole head clamp male head and the pole head clamp female head are fixedly connected and used for fastening the pole heads of the two magnetic yokes, so that gaps between the pole heads of the magnetic yokes are the same.
10. The one-dimensional and two-dimensional high and low frequency magnetic property measurement system of claim 1, wherein the sample plate is divided into three layers, the uppermost layer is used for placing a B-H composite coil and a sample to be measured, the B-H composite coil is placed at the center of the sample to be measured; the middle layer is provided with two grooves for clamping the pole heads formed by the C-shaped upper magnetic yoke and the C-shaped lower magnetic yoke; the lowermost layer is used for being tightly pasted with the pole head clamp and positioning the pole head clamp.
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| CN109856572A (en) * | 2019-04-24 | 2019-06-07 | 河北工业大学 | A kind of one-dimensional and two-dimentional low-and high-frequency magnetic characteristic measuring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109856572A (en) * | 2019-04-24 | 2019-06-07 | 河北工业大学 | A kind of one-dimensional and two-dimentional low-and high-frequency magnetic characteristic measuring system |
| CN109856572B (en) * | 2019-04-24 | 2023-09-22 | 河北工业大学 | One-dimensional and two-dimensional high-low frequency magnetic characteristic measurement system |
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