CN103064048B - Standard fluctuating magnetic field reproducing device and method - Google Patents
Standard fluctuating magnetic field reproducing device and method Download PDFInfo
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- CN103064048B CN103064048B CN201210557008.9A CN201210557008A CN103064048B CN 103064048 B CN103064048 B CN 103064048B CN 201210557008 A CN201210557008 A CN 201210557008A CN 103064048 B CN103064048 B CN 103064048B
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Abstract
The invention discloses a standard fluctuating magnetic field reproducing device and a method. The device comprises a moving axis type fluctuating magnetic field coil device and a fluctuating magnetic field exciting device, wherein the moving axis type fluctuating magnetic field coil device comprises a magnetic axis detector, a fluctuating magnetic field coil body and a magnetic axis adjusting table, the fluctuating magnetic field coil body is of a tricyclic three-route winding structure which is axisymmetric, and the fluctuating magnetic field exciting device comprises a random waveform generator, a linear power amplifier, a signal conditioning unit, a current precision measurement unit and a control software. The fluctuating magnetic field exciting device is capable of outputting signals which are stable in amplitude and continuous in frequency change under the situation of load impedance change by means of the current measuring and feedback control technology. Magnetic signals reproduced by the device are composed of constant magnetic field components and alternating magnetic field components, magnetic field amplitudes are stabilized within the range of 20 microteslas and 100 microteslas and do not change along with frequency change, and magnetic field frequencies can change continuously within the range of 0.1 hertz and 1 kilohertz.
Description
Technical field
Invention relates to a kind of magnetic field reproduction apparatus and method, is specifically related to a kind of standard wave moving field reproducing apparatus and method.
Background technology
Traditional magnetic field reproduction device is generally divided into two kinds, stationary magnetic field reproducing apparatus and alternating magnetic field reproducing apparatus.Stationary magnetic field reproducing apparatus is used for reappearing needed stationary magnetic field, and alternating magnetic field reproducing apparatus is used for reappearing needed alternating magnetic field, and two class devices are independent mutually, do not have an effect mutually.
At present optically pumped magnetometer, proton magnetometer need to be assessed self responding ability to changes of magnetic field under standard Magnetic Field, the magnetic field working range of this type of magnetometer generally between 20 μ T～100 μ T, exceed this scope instrument cannot work.Therefore, need to design a kind of frequency conversion fixed ampllitude (fluctuation) Magnetic Field Standard device that possesses alternating current-direct current resultant field feature, this device need possess and can produce based on realizing adjustable frequency and amplitude fluctuation Magnetic Field Standard signal fan-out capability on basis, stationary magnetic field, and the resultant field signal of outputting standard is for the calibration operation of this type of magnetometer changes of magnetic field responding ability.Two kinds of traditional magnetic field reproduction devices all cannot meet the requirement of this type of standard Magnetic Field of reproduction.
Summary of the invention
In view of this, the invention provides a kind of standard wave moving field reproducing apparatus and method, can produce the fluctuating magnetic field standard signal that is better than 0.1% based on frequency change, amplitude stabilization, accuracy on basis, stationary magnetic field.
Standard wave moving field reproducing apparatus of the present invention comprises: moving axis formula fluctuating magnetic field coil device and fluctuating magnetic field exciting bank.
Described moving axis formula fluctuating magnetic field coil device comprises fluctuating magnetic field coil main body, sample stage, adjustment for angle of inclination, bracing frame and horizontal rotating table.Described adjustment for angle of inclination and fluctuating magnetic field coil main body are arranged on horizontal rotating table by bracing frame.Described horizontal rotating table is for adjusting the position angle of fluctuating magnetic field coil main body, and described adjustment for angle of inclination regulates the angle of inclination between fluctuating magnetic field coil main body and horizontal rotating table.Place sample stage on bracing frame surface, sample stage is used for placing Devices to test.
Described fluctuating magnetic field coil main body is axisymmetric three ring three winding constructions, comprises three toroid windings.If three toroid windings are respectively A ring, B ring and C ring both, wherein the diameter of B ring and C ring both is identical, is all less than the diameter of A ring.The coaxially arranged both sides of encircling at A of B ring and C ring both symmetry, three toroid windings are fixed as a whole by connecting link successively.The magnetic axis direction of fluctuating magnetic field coil main body is identical with the magnetic axis direction of terrestrial magnetic field.
The each toroid winding of described fluctuating magnetic field coil main body includes main winding, earth magnetism correction winding, compensation winding, coil rack and insulation course.Described main winding, earth magnetism correction winding and compensation winding are wrapped on coil rack from inside to outside successively, between each winding, by insulator separation, at compensation winding, insulation course are set outward simultaneously.
The winding construction parameter of described fluctuating magnetic field coil main body is:
The structure proportion of three toroid winding main windings is: A ring main winding is 1: 0.756 with the diameter ratio of B ring, C ring main winding.Spacing between B ring main winding and C ring main winding and the diameter ratio of A ring main winding are 1.31: 1.The turn ratio of A ring main winding and B ring, C ring main winding is 64: 49.The coiling direction of three toroid winding main windings is identical, mutually series connection.
The concrete structure ratio of three toroid winding earth magnetism correction windings is: A ring earth magnetism correction winding is 1: 0.8 with the diameter ratio of B ring, C ring earth magnetism correction winding.Spacing between B ring earth magnetism correction winding and C ring earth magnetism correction winding and the diameter ratio of A ring earth magnetism correction winding are 1.2: 1.The number of turn of three toroid winding earth magnetism correction windings is identical.The coiling opposite direction of the coiling direction of B ring, C ring earth magnetism correction winding and A ring earth magnetism correction winding, three ring series connection mutually.
Three toroid winding compensation winding concrete structure ratios are: A ring compensation winding is 1: 0.796 with the diameter ratio of B ring, C ring compensation winding.Spacing between B ring compensation winding and C ring compensation winding and the diameter ratio of A ring compensation winding are 1.189: 1.Three toroid winding compensation umber of turns are identical, and coiling direction is identical, mutually series connection.
Fluctuating magnetic field exciting bank comprises AWG (Arbitrary Waveform Generator), Linear Power Amplifier, signal condition unit, electric current precision measurement unit and controls software.Described AWG (Arbitrary Waveform Generator) is connected with Linear Power Amplifier by signal condition unit, Linear Power Amplifier is connected with current measuring unit, current measuring unit is connected with the fluctuating magnetic field coil main body in moving axis formula fluctuating magnetic field coil device, control software and be connected with AWG (Arbitrary Waveform Generator), interconnect with current measuring unit simultaneously.
In described moving axis formula fluctuating magnetic field coil device, also comprise magnetic axis detector, described magnetic axis detector is fixed in the external frame of fluctuating magnetic field coil main body, the parallel axis with fluctuating magnetic field coil main body of its magnetic axis axis.
The 360 ° of rotations in the horizontal direction of described horizontal rotating table.
It is 46 ° ± 3 ° that described adjustment for angle of inclination regulates the scope at the pitch angle between fluctuating magnetic field coil main body and horizontal rotating table.
Adopt the method for said apparatus reproduction standard wave moving field to be:
Step 1: survey terrestrial magnetic field axis direction by magnetic axis detector.
Step 2: the position angle of adjusting fluctuating magnetic field coil main body by horizontal rotating table, regulate the pitch angle between fluctuating magnetic field coil main body and horizontal rotating table by adjustment for angle of inclination, make the magnetic axis direction of the terrestrial magnetic field that the magnetic axis direction of fluctuating magnetic field coil main body surveys with step 1 identical.
Step 3: in size and the frequency of controlling target setting fluctuating magnetic field in software.
Step 4: control size and the frequency control AWG (Arbitrary Waveform Generator) output sinusoidal signal of software according to the object wave moving field of setting.Control electric current precision measurement unit simultaneously and switch interchange measuring resistance group.
Step 5: AWG (Arbitrary Waveform Generator) is to signal condition unit output frequency sinusoidal signal accurately.This sinusoidal signal, by signal condition unit and Linear Power Amplifier, is adjusted into the current drive signal that drives moving axis formula fluctuating magnetic field coil device to produce fluctuating magnetic field.
Step 6: the current drive signal after adjusting is sent to electric current precision measurement unit by signal condition unit.
Step 7: peak value and the side-play amount of current drive signal measured in electric current precision measurement unit, feeds back to control software.Control the amplitude of software sinusoidal signal to AWG (Arbitrary Waveform Generator) output according to the size of its inner object wave moving field and finely tune, make the in the same size of itself and default object wave moving field.
Step 8: current drive signal is exported to three toroidal main windings in fluctuating magnetic field coil main body by electric current precision measurement unit.
Step 9: fluctuating magnetic field coil main body produces object wave moving field after receiving current drive signal.
Beneficial effect:
(1) fluctuating magnetic field standard set-up of the present invention can produce and control constant, alternation resultant field, thus the responding ability of assessment measurand (including but are not limited to atomic formula magnetometer) to changes of magnetic field.
(2) fluctuating magnetic field that fluctuating magnetic field standard set-up of the present invention produces, in the process of adjusting frequency, can keep fluctuating magnetic field amplitude stabilization constant, and the variation of from ultralow frequency to audiorange (0.1Hz～1kHz) occurs field frequency.
(3) fluctuating magnetic field of reproduction is absolute magnitude total amount magnetic field, has comprised the impact of earth magnetism on magnetic field total amount, has utilized the part of terrestrial magnetic field as Magnetic Field Source, has reduced the power consumption of device itself.
(4) utilize magnetic axis detector to realize the detection to earth magnetism magnetic axis direction, instruct the magnetic axis of adjustment moving axis formula fluctuating magnetic field coil device axial parallel with earth magnetism magnetic, and detect its parallel degree.
(5) utilize the fluctuating magnetic field coil of a set of San Huan tri-road winding constructions to realize the output of the fluctuating magnetic field with the compound frequency conversion feature of alternating current-direct current, constant and the alternating magnetic field component of this resultant field can independently be adjusted, magnetic field amplitude variation range 20 μ T～100 μ T.
(6) can ensure 3 × 106mm
3magnetic field non-uniformity in workspace is better than 0.05%.
(7) loaded impedance under different frequency is changed, the ac current signal of amplitude stabilization can be provided, the frequency-tuning range of current signal is 0.1Hz～1000Hz.
Brief description of the drawings
Fig. 1 is the theory diagram of fluctuating magnetic field standard set-up of the present invention;
Fig. 2 is the structural representation of moving axis formula fluctuating magnetic field coil device of the present invention;
Fig. 3 is the structural representation of moving axis formula fluctuating magnetic field coil device winding;
Fig. 4 is fluctuating magnetic field exciting bank circuit theory schematic diagram.
Wherein: 1-horizontal rotating table, 2-adjustment for angle of inclination, 3-fluctuating magnetic field coil main body, 4-sample stage, 5-bracing frame, 6-main winding, 7-earth magnetism correction winding, 8-compensation winding, 9-coil rack, 10-insulation course
Embodiment
Below in conjunction with the accompanying drawing embodiment that develops simultaneously, describe the present invention.
The standard wave moving field reproducing apparatus that the present embodiment provides can provide the standard wave moving field signal of calibration atomic formula (optical pumping, proton) magnetometer responding ability, the field signal of its reproduction is made up of stationary magnetic field component and alternating magnetic field component, magnetic field amplitude is stable within the scope of 20 μ T～100 μ T, and amplitude does not change with frequency change, field frequency can change continuously within the scope of 0.1Hz～1kHz.
The principle of described standard wave moving field reproducing apparatus as shown in Figure 1, comprises moving axis formula fluctuating magnetic field coil device and fluctuating magnetic field exciting bank.
Wherein moving axis formula fluctuating magnetic field coil device comprises magnetic axis detector, fluctuating magnetic field coil main body and magnetic axis regulating platform, as shown in Figure 2.The sensing angle that magnetic axis regulating platform is used for the firm and fluctuating magnetic field coil main body of realizing fluctuating magnetic field coil device regulates.Magnetic axis regulating platform comprises sample stage 4, adjustment for angle of inclination and horizontal rotating table 1.Horizontal rotating table 1 360 ° of rotations in the horizontal direction.Adjustment for angle of inclination 2 and fluctuating magnetic field coil main body 3 are arranged on horizontal rotating table 1 by bracing frame 5, and adjustment for angle of inclination is used for supporting fluctuating magnetic field coil main body, and regulate fluctuating magnetic field coil main body and the angle of inclination that horizontally rotates interstation.Adjustment for angle of inclination in the present embodiment possesses the regulating power of 46 ° ± 3 °.Place sample stage 4 on bracing frame 5 surfaces, for placing Devices to test.Horizontal rotating table 1 and adjustment for angle of inclination 2 coordinate position angle and the pitch angle of adjusting fluctuating magnetic field coil main body 3, make the magnetic axis direction of fluctuating magnetic field coil and the magnetic axis direction of terrestrial magnetic field parallel, realize terrestrial magnetic field as part field signal source.Magnetic axis detector is used for judging the fluctuation axis of coil main body 3 and the depth of parallelism of terrestrial magnetic field axis.Magnetic axis detector is fixed in the external frame of fluctuating magnetic field coil main body 3, the parallel axis with fluctuating magnetic field coil main body 3 of its magnetic axis axis.Magnetic axis detector, by the magnetic direction of identification present position of the present invention, is measured the position that maximum magnetic induction occurs, judges the parallel degree of fluctuation coil main body axis and terrestrial magnetic field axis.
Described fluctuating magnetic field coil main body is axisymmetric three ring three winding constructions.Be respectively A ring, B ring and C ring both if form three toroid windings of fluctuating magnetic field coil main body, wherein the diameter of B ring and C ring both is identical, is all less than the diameter of A ring, the coaxially arranged both sides of encircling at A of B ring and C ring both symmetry, as shown in Figure 2.Three toroid windings are fixed as a whole by connecting link successively, adjust the pitch angle of fluctuating magnetic field coil main body by adjustment for angle of inclination 2, adjust its position angle by horizontal rotating table 1.
The each toroid winding of fluctuating magnetic field coil main body comprises main winding 6, earth magnetism correction winding 7, compensation winding 8, coil rack 9 and insulation course 10.Described main winding 6, earth magnetism correction winding 7, compensation winding 8 are wrapped on coil rack 9 from inside to outside successively, between each winding, by insulator separation, are compensating the outer insulation course 10 that arranges of winding 8, as shown in Figure 3 simultaneously.Main winding 6, earth magnetism correction winding 7 and compensation winding 8 are respectively used to realize fluctuating magnetic field, revise magnetic field gradient, compensating field homogeneity range.
The present embodiment, by the winding construction parameter of design fluctuating magnetic field coil main body, relies on the alternating current-direct current resultant field of a map winding output device for certain magnetic field homogeneity range.The winding construction parameter of fluctuating magnetic field coil main body is specially:
The structure proportion of (1) three toroid winding main winding is:
A ring main winding is 1: 0.756 with the diameter ratio of B ring, C ring main winding.
Spacing between B ring main winding and C ring main winding and the diameter ratio of A ring main winding are 1.31: 1;
The turn ratio of A ring main winding and B ring, C ring main winding is 64: 49;
The coiling direction of three toroid winding main windings is identical, mutually series connection.
The concrete structure ratio of earth magnetism correction winding is:
A ring earth magnetism correction winding is 1: 0.8 with the diameter ratio of B ring, C ring earth magnetism correction winding;
Spacing between B ring earth magnetism correction winding and C ring earth magnetism correction winding and the diameter ratio of A ring earth magnetism correction winding are 1.2: 1;
The number of turn of three toroid winding earth magnetism correction windings is identical; The coiling direction of B ring, C ring earth magnetism correction winding and the coiling opposite direction of A ring earth magnetism correction winding, three ring series connection mutually, the magnetic field gradient of the interior 1nT～1000nT scope of magnetic field homogeneity range that earth magnetism correction winding can compensate for ambient magnetic field gradient causes.
(3) three toroid winding compensation winding concrete structure ratios are:
A ring compensation winding is 1: 0.796 with the diameter ratio of B ring, C ring compensation winding;
Spacing between B ring compensation winding and C ring compensation winding and the diameter ratio of A ring compensation winding are 1.189: 1;
Three toroid winding compensation umber of turns are identical, and coiling direction is identical, mutually series connection.Compensation winding can compensating field homogeneity range in the magnetic field skew of 1nT～1000nT scope, the magnetic field heterogeneity realizing in homogeneity range is less than 0.1%.
The circuit theory of fluctuating magnetic field exciting bank as shown in Figure 4, comprises AWG (Arbitrary Waveform Generator), Linear Power Amplifier, signal condition unit, current measuring unit and controls software.Fluctuating magnetic field exciting bank, by current measurement and feedback control technology, is realized in the situation that loaded impedance changes, and output amplitude is stable, frequency continually varying signal.AWG (Arbitrary Waveform Generator) is connected with Linear Power Amplifier by signal condition unit, Linear Power Amplifier is connected with current measuring unit, current measuring unit is connected with the fluctuating magnetic field coil main body in moving axis formula fluctuating magnetic field coil device, control software and be connected with AWG (Arbitrary Waveform Generator), interconnect with current measuring unit simultaneously.
The process that produces standard wave moving field by said apparatus is:
Step 1: survey terrestrial magnetic field magnetic axis direction by magnetic axis detector;
Step 2: the position angle of adjusting fluctuating magnetic field coil main body 3 by horizontal rotating table 1, regulate the pitch angle between fluctuating magnetic field coil main body 3 and horizontal rotating table 1 by adjustment for angle of inclination 2, make the magnetic axis direction of the terrestrial magnetic field that the magnetic axis direction of fluctuating magnetic field coil main body 3 surveys with step 1 identical;
Step 3: in size and the frequency of controlling target setting magnetic field in software, AWG (Arbitrary Waveform Generator) is set the output of sinusoidal signal according to the magnetic field of the goal of setting, controls electric current precision measurement unit simultaneously and switches and exchange measuring resistance group according to the magnetic field of the goal of setting.
Step 4: AWG (Arbitrary Waveform Generator) is to signal condition unit output frequency sinusoidal signal accurately; This sinusoidal signal, by signal condition unit and Linear Power Amplifier, is adjusted into the current drive signal that drives moving axis formula fluctuating magnetic field coil device to produce fluctuating magnetic field.
Step 5: the current drive signal after adjusting is sent to electric current precision measurement unit by signal condition unit, electric current precision measurement unit by using AC resistance and high speed 24bitA/D transducer are measured peak value and the side-play amount of current drive signal, feed back to control software.Control software, according to its inner preset value, the amplitude of AWG (Arbitrary Waveform Generator) output signal is finely tuned to (make its consistent with preset value), thereby realize the stable of current signal, modifying factor different frequency causes circuit loop impedance variation and the influence factor of working current skew in moving axis formula fluctuating magnetic field coil device.Current drive signal is exported to three toroidal main windings in moving fluctuating magnetic field coil main body 3 by electric current precision measurement unit.
Step 6: produce magnetic field of the goal after moving axis formula fluctuating magnetic field coil device receives current drive signal.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. standard wave moving field reproducing apparatus, is characterized in that, comprising: moving axis formula fluctuating magnetic field coil device and fluctuating magnetic field exciting bank;
Described moving axis formula fluctuating magnetic field coil device comprises fluctuating magnetic field coil main body (3), sample stage (4), adjustment for angle of inclination (2), bracing frame (5) and horizontal rotating table (1); Described adjustment for angle of inclination (2) and fluctuating magnetic field coil main body (3) are arranged on horizontal rotating table (1) by bracing frame (5); Described horizontal rotating table (1) is for adjusting the position angle of fluctuating magnetic field coil main body (3), and described adjustment for angle of inclination (2) regulates the angle of inclination between fluctuating magnetic field coil main body (3) and horizontal rotating table (1); Place sample stage (4) on bracing frame (5) surface, sample stage (4) is for placing Devices to test;
Described fluctuating magnetic field coil main body (3) is axisymmetric three ring three winding constructions, comprises three toroid windings; If three toroid windings are respectively A ring, B ring and C ring both, wherein the diameter of B ring and C ring both is identical, is all less than the diameter of A ring; The coaxially arranged both sides of encircling at A of B ring and C ring both symmetry, three toroid windings are fixed as a whole by connecting link successively; The magnetic axis direction of fluctuating magnetic field coil main body (3) is identical with the magnetic axis direction of terrestrial magnetic field;
The each toroid winding of described fluctuating magnetic field coil main body (3) includes main winding (6), earth magnetism correction winding (7), compensation winding (8), coil rack (9) and insulation course (10); Described main winding (6), earth magnetism correction winding (7) and compensation winding (8) are wrapped on coil rack (9) from inside to outside successively, between each winding, by insulator separation, outside compensation winding (8), insulation course (10) is set simultaneously;
The winding construction parameter of described fluctuating magnetic field coil main body (3) is:
The structure proportion of three toroid winding main windings is: A ring main winding is 1: 0.756 with the diameter ratio of B ring, C ring main winding; Spacing between B ring main winding and C ring main winding and the diameter ratio of A ring main winding are 1.31: 1; The turn ratio of A ring main winding and B ring, C ring main winding is 64: 49; The coiling direction of three toroid winding main windings is identical, mutually series connection;
The concrete structure ratio of three toroid winding earth magnetism correction windings is: A ring earth magnetism correction winding is 1: 0.8 with the diameter ratio of B ring, C ring earth magnetism correction winding; Spacing between B ring earth magnetism correction winding and C ring earth magnetism correction winding and the diameter ratio of A ring earth magnetism correction winding are 1.2: 1; The number of turn of three toroid winding earth magnetism correction windings is identical; The coiling opposite direction of the coiling direction of B ring, C ring earth magnetism correction winding and A ring earth magnetism correction winding, three ring series connection mutually;
Three toroid winding compensation winding concrete structure ratios are: A ring compensation winding is 1: 0.796 with the diameter ratio of B ring, C ring compensation winding; Spacing between B ring compensation winding and C ring compensation winding and the diameter ratio of A ring compensation winding are 1.189: 1; Three toroid winding compensation umber of turns are identical, and coiling direction is identical, mutually series connection;
Fluctuating magnetic field exciting bank comprises AWG (Arbitrary Waveform Generator), Linear Power Amplifier, signal condition unit, current measuring unit and control software; Described AWG (Arbitrary Waveform Generator) is connected with Linear Power Amplifier by signal condition unit, Linear Power Amplifier is connected with current measuring unit by signal condition unit, current measuring unit is connected with the fluctuating magnetic field coil main body in moving axis formula fluctuating magnetic field coil device, control software and be connected with AWG (Arbitrary Waveform Generator), interconnect with current measuring unit simultaneously.
2. standard wave moving field reproducing apparatus as claimed in claim 1, it is characterized in that, in described moving axis formula fluctuating magnetic field coil device, also comprise magnetic axis detector, described magnetic axis detector is fixed in the external frame of fluctuating magnetic field coil main body (3), the parallel axis with fluctuating magnetic field coil main body (3) of its magnetic axis axis.
3. standard wave moving field reproducing apparatus as claimed in claim 1, is characterized in that, described horizontal rotating table (1) 360 ° of rotations in the horizontal direction.
4. standard wave moving field reproducing apparatus as claimed in claim 1, it is characterized in that, it is 46 ° ± 3 ° that described adjustment for angle of inclination (2) regulates the scope at the pitch angle between fluctuating magnetic field coil main body (3) and horizontal rotating table (1).
5. the method that adopts said apparatus reproduction standard wave moving field, is characterized in that,
Step 1: survey terrestrial magnetic field magnetic axis direction by magnetic axis detector;
Step 2: the position angle of adjusting fluctuating magnetic field coil main body (3) by horizontal rotating table (1), regulate the pitch angle between fluctuating magnetic field coil main body (3) and horizontal rotating table (1) by adjustment for angle of inclination (2), make the magnetic axis direction of the terrestrial magnetic field that the magnetic axis direction of fluctuating magnetic field coil main body (3) surveys with step 1 identical;
Step 3: in size and the frequency of controlling target setting fluctuating magnetic field in software;
Step 4: control size and the frequency control AWG (Arbitrary Waveform Generator) output sinusoidal signal of software according to the object wave moving field of setting; Control current measuring unit simultaneously and switch interchange measuring resistance group;
Step 5: AWG (Arbitrary Waveform Generator) is to signal condition unit output frequency sinusoidal signal accurately; This sinusoidal signal, by signal condition unit and Linear Power Amplifier, is adjusted into the current drive signal that drives moving axis formula fluctuating magnetic field coil device to produce fluctuating magnetic field;
Step 6: the current drive signal after adjusting is sent to current measuring unit by signal condition unit;
Step 7: current measuring unit is measured peak value and the side-play amount of current drive signal, feeds back to control software; Control the amplitude of software sinusoidal signal to AWG (Arbitrary Waveform Generator) output according to the size of its inner object wave moving field and finely tune, make the in the same size of itself and default object wave moving field;
Step 8: current drive signal is exported to three toroidal main windings in fluctuating magnetic field coil main body (3) by current measuring unit;
Step 9: fluctuating magnetic field coil main body (3) produces object wave moving field after receiving current drive signal.
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| CN104569884B (en) * | 2013-10-18 | 2017-10-27 | 中国科学院上海微系统与信息技术研究所 | The caliberating device and method of a kind of SPUID three axis magnetometer |
| CN111060861B (en) * | 2019-12-09 | 2022-06-21 | 中国船舶重工集团有限公司第七一0研究所 | Atomic magnetometer gradient tolerance calibrating device |
| CN112414399B (en) * | 2020-11-12 | 2023-04-04 | 南京理工大学 | Adjustable rotating magnetic field generating device |
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