CN104569884B - The caliberating device and method of a kind of SPUID three axis magnetometer - Google Patents
The caliberating device and method of a kind of SPUID three axis magnetometer Download PDFInfo
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- CN104569884B CN104569884B CN201310492622.6A CN201310492622A CN104569884B CN 104569884 B CN104569884 B CN 104569884B CN 201310492622 A CN201310492622 A CN 201310492622A CN 104569884 B CN104569884 B CN 104569884B
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Abstract
The present invention provides the caliberating device and method of a kind of SPUID three axis magnetometer, and the device includes：Signal generator produces the sinusoidal signal of selected frequency and setting amplitude；Coil produces constant AC magnetic field under the driving of sinusoidal signal；Cryostat maintains the operating temperature of SPUID three axis magnetometer；Rotating mechanism installs coil and cryostat, coil is adjusted relative to SPUID three axis magnetometer in horizontal plane and vertical plane with any angle, uniform AC magnetic field is produced around SPUID three axis magnetometer；The result that SPUID three axis magnetometer is responded AC magnetic field by lock-in amplifier under the reference of sinusoidal signal is detected.The problem of can not measuring Absolute geomagnetic field present invention, avoiding the rotation of SQUID three axis magnetometers probe itself and magnetometer and be difficult to demarcation, realizes the calculating of correction coefficient.
Description
Technical field
The invention belongs to magnetic field measurement technology field, it is related to a kind of caliberating device, more particularly to a kind of Superconducting Quantum is done
Relate to the caliberating device and method of device three axis magnetometer.
Background technology
SPUID（Superconducting Quantum Interference Device, SQUID）It is
The most sensitive Magnetic Sensor being currently known, is widely used in the detection of faint magnetic signal.SQUID is a superconducting ring, is passed through
The superconducting ring magnetic flux that is subject to of inner sense is read to read magnetic field.Due to the area very little of SQUID superconducting rings, field homogeneity in ring,
Magnetic field intensity of the magnetic flux that SQUID is surveyed just to SQUID superconduction loop coupling is directly proportional.Therefore coupled using SQUID superconductions plane of a loop
Magnetic flux and SQUID measurements magnetic field just constitute SQUID magnetometers.
SQUID magnetometers are vector sensors, only the magnetic field in measurement SQUID superconducting ring plane normals direction.Actually should
In, magnetic field resultant field is measured, it is necessary to measure three components of magnetic vector, i.e. X-axis, Y-axis, the component of three axial directions of Z axis.It is logical
The component for crossing three axial directions obtains magnetic field resultant field.The resultant field in existing SQUID magnetometer surveys magnetic field is used, three need to be used
SQUID magnetometers, three magnetometers are mutually perpendicular to, and are respectively defined as X-axis, Y-axis, three vertical components of Z axis.Three axis magnetometer is surveyed
Vector component of the Vector Magnetic Field in tri- vertical direction of XYZ is obtained, so as to obtain the measurement of resultant field.Therefore three axis magnetometer is orthogonal
Property, i.e., the uniformity between vertical property and magnetometer between axle and axle is most important to the measurement accuracy of resultant field.If
Orthogonality is not high, then what three axis magnetometer was obtained is not completely orthogonal magnetic-field component, in addition to orthogonal angles deviation is introduced
Other magnetic-field components, therefore the resultant field obtained is calculated by above-mentioned formula and has error with actual resultant field.On the other hand, magnetic strength
Magnetic field intensity is converted into voltage and measured by meter, therefore the field voltage conversion coefficient of the magnetometer of three axles will be marked accurately
It is fixed, otherwise also it can introduce error in total field computation.In summary, three axis magnetometer will be carried out before the application of total field measurement
Orthogonality demarcation and the demarcation of field voltage conversion coefficient, to meet the measurement request in diverse vector magnetic field, obtain accurate
Resultant field numerical value.
The demarcation and bearing calibration of three axis magnetometer can be divided to two classes, and a class is vector calibration, i.e. magnetometer and given mark
Quasi- Vector Magnetic Field is compared calibration.It is another kind of, it is scalar calibration, gives three axis magnetometer one constant magnetic field, the mark in magnetic field
The resultant field scalar that value exports synthesis with magnetic sensor carries out comparison calibration.Being demarcated due to vector needs precision very high sky
Between positioner, cost is high, and enforcement difficulty is big.The method of current main flow is to use scalar calibration method.The thought of scalar calibration
It is to load a constant magnetic field to three axis magnetometer, changes angle of the three axis magnetometer in magnetic field, obtain three-axle magnetic field point
Amount,, will by the method for parametric solution according to the invariable principle of the resultant field that three-axle magnetic field component is synthesized under any angle
The orthogonal angles deviation and field voltage conversion coefficient of actual three axis magnetometer are obtained.Three axle magnetic are demarcated using parametric solution method
During strong meter, it is desirable to provide constant magnetic field or the magnetic field space of homogeneous constant, make three axis magnetometer in the magnetic field inward turning
Turn, translation-angle measures three axis components.The three axis component data measured under one group of any angle set up equation.Uniform permanent
Under fixed-field, any translation-angle, the resultant field of three axles synthesis is constant.Therefore three axles under one group of any translation-angle are obtained to pass
The measurement data of sensor, passes through the parametric solution algorithm such as least square, you can obtain the field voltage conversion system of three-axis sensor
The angular error of number and three axle quadrature modules.
SQUID magnetometers are different from traditional magnetic resistance or magnetic flux magnetometer, and SQUID magnetometers can only be measured to be started from sensor
Changes of magnetic field amount from the time of measurement, and the measurement of Absolute geomagnetic field can not be realized.The axles of SQUID tri- that SQUID sensors are constituted
Magnetometer, can only realize the measurement of exchange variation magnetic field.Therefore to realize orthogonality demarcation it is necessary to empty where three axis magnetometer
Between produce one exchange constant variation magnetic field, while to make three axis magnetometer surround changes of magnetic field so that three axis magnetometer
Output changes.
On the other hand, SQUID magnetometers use low temperature or high temperature SQUID device, and device is operated in low temperature or hot environment
When lower, such as low-temperature superconducting SQUID is immersed in the temperature that 4.2K is maintained in the cryostat for be inoculated with liquid helium；High-temperature superconductor then soaks
7.7K operating temperature is maintained in the cryostat for be inoculated with liquid nitrogen.Because cryostat volume is larger so that whole to visit
Survey body product big, it has not been convenient to mobile.Cryogenic liquid is irrigated in cryostat simultaneously, rotating detector can cause cryogenic liquid significantly
Degree fluctuation so that SQUID is because temperature is unstable or cryogenic liquid produces drum and influences work.Therefore SQUID sensors are visited
Head can not be rotated at random.
Above-mentioned SQUID three axis magnetometers above have two specific factors in application：1）Measured using SQUID three axis magnetometer
Be relative variation magnetic field, it is impossible to calculate Absolute geomagnetic field；2）SQUID sensors are maintained using the thermostat of perfusion cryogenic liquid
Operation, whole sensor probe can not be rotated at random.
The content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of SPUID three
The caliberating device and method of axle magnetometer, variation magnetic field is only recognized for solving SQUID three axis magnetometers in existing calibration process
And sensor probe is the problem of can not be rotated at random.
In order to achieve the above objects and other related objects, the present invention provides a kind of SPUID three axis magnetometer
Caliberating device and method.
A kind of caliberating device of SPUID three axis magnetometer, including：Signal generator, coil, low temperature is permanent
Warm device, rotating mechanism, lock-in amplifier；The signal generator produces the sinusoidal signal of selected frequency and setting amplitude；It is described
Coil is connected with the signal generator, and the AC magnetic field of constant amplitude is produced under the driving of the sinusoidal signal；It is described low
SPUID three axis magnetometer built in warm thermostat, the work for maintaining SPUID three axis magnetometer
Make temperature；The rotating mechanism is used to install the coil and the cryostat, makes coil relative to the Superconducting Quantum
Interfered device three axis magnetometer is adjusted in horizontal plane and vertical plane with any angle, in the SPUID three
The AC magnetic field of uniform constant amplitude is produced around axle magnetometer；The lock-in amplifier is connected with the signal generator,
SPUID three axis magnetometer described in calibration process is responded into the exchange under the reference of the sinusoidal signal
The result in magnetic field is detected.
Preferably, the rotating mechanism includes：Support, for vertically fixing the cryostat, makes positioned at described low
SPUID three axis magnetometer in warm thermostat is static；Base, supports the support；Rotating disk, is socketed on institute
State on support, in the horizontal plane around the support rotate, while drive the coil around the support in the horizontal plane with
Arbitrary Rotation；Rotary shaft, is arranged at the edge of the rotating disk, on a vertical plane with any angle rotation, in level
Revolved round the sun on face with rotating disk with any angle；The coil is installed in the rotary shaft, in the SPUID
The AC magnetic field of the constant amplitude adjusted on horizontal plane and vertical plane with any angle is produced around three axis magnetometer.
Preferably, the coil includes first side coil, second side coil and connecting rod；The connecting rod is built-in with
Connecting line, one end of the connecting line is electrically connected with the first side coil, and the other end is electrically connected with the second side coil
It is logical；The center of the connecting rod is fixed in the rotary shaft；The first side coil and second side coil are Hai Muhuo
Hereby coil.
Preferably, the support includes upper bracket and lower carriage, and the coupling part of the upper bracket and lower carriage is easily combined
And easily take apart；The base is yi word pattern structure, and the base of yi word pattern structure supports the support from the bottom of the lower carriage；
The length of connecting rod in the coil is more than the height of the upper bracket；When the lower carriage passes through the first side coil
Or second side coil with the upper bracket when being connected, the coil realizes the setting that the anglec of rotation is 180 degree.
Preferably, the base separates assembling with support, and base is easily combined with the coupling part of support and easily taken apart；It is described
Base is inverted T-type structure, and the base of inverted T-type structure is arranged at the bottom of the support, and the support is supported from frame bottom；Institute
The length for stating the connecting rod in coil is more than the height of the support；When the base of the inverted T-type structure passes through first side
When the center section of planar coil or second side coil is connected with the support, the coil realizes that the anglec of rotation is 180 degree
Set；When the base of the inverted T-type structure replaces with the base of the type of falling ∏ structure, the type of the falling ∏ base is arranged at the branch
The bottom or both sides of frame, support described in the lateral support from the bottom support support of support or from support.
Preferably, the rotating mechanism includes fixed frame, swivel bearing；The fixed frame includes being arranged on horizontal plane
On circular guideway, the armed lever of the stuck-module that is slided along the circular guideway and the fixed circular guideway of support；It is described solid
Cover half block fixes the cryostat, and drives the cryostat in the horizontal plane with Arbitrary Rotation；The rotation
Rotating shaft, which is held, to be arranged on the armed lever, on a vertical plane with any angle rotation；The coil is installed on the swivel bearing
On, and in the case where the rotation of swivel bearing drives on a vertical plane centered on the SPUID three axis magnetometer
With Arbitrary Rotation；The coil is Helmholtz coil.
A kind of scaling method of SPUID three axis magnetometer, including：Choosing is produced using a signal generator
Determine the sinusoidal signal of frequency and setting amplitude；The AC magnetic field of coil generation constant amplitude is driven using the sinusoidal signal；
The axle magnetic strength of SPUID three is maintained using SPUID three axis magnetometer built in a cryostat
The operating temperature of meter；The coil and the cryostat are installed using a rotating mechanism, make coil relative to the superconduction
Quantum interference device three axis magnetometer is adjusted in horizontal plane and vertical plane with any angle, in the superconducting quantum interference device
The AC magnetic field of uniform constant amplitude is produced around part three axis magnetometer；Using the sinusoidal signal to examine, using one with it is described
The connected lock-in amplifier of signal generator responds SPUID three axis magnetometer described in calibration process described
The result of AC magnetic field is detected.
Preferably, the coil and the cryostat are installed using rotating mechanism, coil is surrounded the superconduction amount
The detailed process that sub- interfered device three axis magnetometer is adjusted in horizontal plane and vertical plane with any angle includes：Utilize one
Frame vertically fixes the cryostat, makes the SPUID three axis magnetometer being located in the cryostat quiet
Only；The support is supported using a base；It is socketed on the support and is rotated in the horizontal plane around the support using one
Rotating disk drive the coil around the support in the horizontal plane with Arbitrary Rotation；The rotation is arranged at using one
The edge of disk, and on a vertical plane with any angle rotation, and revolved round the sun in the horizontal plane with rotating disk with any angle
Rotary shaft installs the coil, coil is produced in horizontal plane and is hung down around the SPUID three axis magnetometer
The AC magnetic field of the constant amplitude adjusted in straight plane with any angle.
Preferably, the installation process of the coil includes：The first coil includes first side coil, second side line
Circle and connecting rod；The connecting rod is built-in with connecting line, and one end of the connecting line is electrically connected with the first side coil, separately
One end is electrically connected with the second side coil；The first side coil and second side coil are Helmholtz coil；Institute
The center for stating connecting rod is fixed in the rotary shaft, flat in horizontal plane and vertically with the rotation and revolution band moving winding of rotary shaft
With Arbitrary Rotation on face.
Preferably, the base supports the mode of the support to include：The support is split as upper bracket and lower carriage, institute
State the coupling part easily combination of upper bracket and lower carriage and easily take apart；The base is yi word pattern structure, the bottom of yi word pattern structure
Seat supports the support from the bottom of the lower carriage；The length of connecting rod in the coil is more than the height of the upper bracket
Degree；The upper bracket and lower carriage are taken apart, first side coil is rotated to the surface or underface of the upper bracket, will
Lower carriage is connected through the second side coil or first side coil with upper bracket, realizes that the coil anglec of rotation is
The regulation of 180 degree.
Preferably, the base supports the mode of the support to include：The base separates assembling, base and branch with support
Easily combine and easily take apart in the coupling part of frame；The base is inverted T-type structure, and the base of inverted T-type structure is arranged at the support
Bottom, support the support from frame bottom；The length of connecting rod in the coil is more than the height of the support；It will fall
The base and support of T-type structure are taken apart, first side coil is rotated to the surface or underface of the support, will be inverted T shaped
The center section of the base of structure through the second side coil or first side coil is connected with the support, is realized described
The coil anglec of rotation is the regulation of 180 degree；It is described when the base of the inverted T-type structure replaces with the base of the type of falling ∏ structure
The type of falling ∏ base is arranged at the bottom or both sides of the support, and the support or the lateral bolster from support are supported from the bottom of support
Support the support.
Preferably, the coil and the cryostat are installed using rotating mechanism, coil is surrounded the superconduction amount
The detailed process that sub- interfered device three axis magnetometer is adjusted in horizontal plane and vertical plane with any angle includes：It is solid using one
Determine frame and fix the cryostat；The fixed support includes setting circular guideway in the horizontal plane, along the circle
The armed lever for the fixed circular guideway of stuck-module and support that guide rail is slided；The stuck-module fixes the cryogenic thermostat
Device, and the cryostat is driven in the horizontal plane with Arbitrary Rotation；The rotation on the armed lever is arranged at using one
Bearing installs the coil, makes the coil with the rotation of swivel bearing on a vertical plane with the SPUID
With Arbitrary Rotation centered on three axis magnetometer；The coil is Helmholtz coil.
As described above, the caliberating device and scaling method of SPUID three axis magnetometer of the present invention,
Have the advantages that：
Rotation present invention, avoiding SQUID magnetometers probe relative to cryostat, it is ensured that in cryostat
The stability of liquid, has evaded the influence that the liquid fluctuation in cryostat is caused to SQUID magnetometers probe, has been directed to simultaneously
SQUID magnetometers can not measure Absolute geomagnetic field and be difficult with the problem of stationary magnetic field is demarcated, the method for employing exchange demarcation,
And by way of locking phase amplification detection, the acquisition of data, realizes correction coefficient needed for being realized using least-squares algorithm
Calculating.
Brief description of the drawings
Fig. 1 a are the structural representation of the caliberating device of SPUID three axis magnetometer of the present invention.
Fig. 1 b are the schematic flow sheet of the scaling method of SPUID three axis magnetometer of the present invention.
Fig. 2 a to Fig. 2 d are structural representation of the coil on rotating mechanism described in embodiment one.
Fig. 3 a to Fig. 3 b are that the structure of the first solution of the coil anglec of rotation regulation blind area described in embodiment one is shown
It is intended to.
Fig. 3 c to Fig. 3 d are the first of the second solution of the coil anglec of rotation regulation blind area described in embodiment one
Structural representation.
Fig. 3 e to Fig. 3 f are second of the second solution of the coil anglec of rotation regulation blind area described in embodiment one
Structural representation.
Fig. 4 is the schematic flow sheet of the scaling method of the SPUID three axis magnetometer described in embodiment one.
Fig. 5 a are the support bracket fastened structural representation described in embodiment two.
Fig. 5 b are the rotational structure schematic diagram of cryostat in the horizontal plane described in embodiment two.
Fig. 5 c are the rotational structure schematic diagram of coil on a vertical plane described in embodiment two.
Fig. 5 d are the side view of the rotating mechanism described in embodiment two.
Fig. 6 is the schematic flow sheet of the scaling method of the SPUID three axis magnetometer described in embodiment two.
Component label instructions
100 caliberating devices
110 signal generators
120 coils
121 first side coils
122 second side coils
123 connecting rods
130 cryostats
140th, 500 rotating mechanism
141 supports
1411 upper brackets
1412 lower carriages
142 bases
143 rotating disks
144 rotary shafts
150 lock-in amplifiers
510 fixed frames
511 circular guideways
512 stuck-modules
513 armed levers
514 roller bearings
515 cylindrical drums
520 swivel bearings
600 SPUID three axis magnetometers
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through specific realities different in addition
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
Refer to accompanying drawing.It should be noted that the diagram provided in the present embodiment only illustrates the present invention in a schematic way
Basic conception, then in schema only display with relevant component in the present invention rather than according to component count during actual implement, shape
Shape and size are drawn, and it is actual when implementing kenel, quantity and the ratio of each component can be a kind of random change, and its component cloth
Office's kenel may also be increasingly complex.
First, the orthogonality correction of the SQUID three axis magnetometers based on SQUID sensors has its particularity, i.e. SQUID
Three axis magnetometer only measures relative variation magnetic field, it is impossible to measure Absolute geomagnetic field；Secondly, SQUID three axis magnetometers are placed on perfusion
In the cryostat of cryogenic liquid, whole sensor probe is immovable.The present invention devises institute for above-mentioned two dot characteristics
The SPUID stated（SQUID）The caliberating device and scaling method of three axis magnetometer.The caliberating device and demarcation side
Method need to only recognize variation magnetic field for SQUID three axis magnetometers and can not move in order to be able to current orthogonal three axle bearing calibration of application
Dynamic the characteristics of, design verification device, calibration equipment is used for providing a constant variation, and centered on three axis magnetometer,
With Arbitrary Rotation, according to the data of acquisition, by correcting algorithm, realize that correction coefficient is solved.
The SPUID that the present invention is used（Abbreviation SQUID）Magnetic sensor different from common magnetic sense
The place of device is：1）SPUID（Abbreviation SQUID）Magnetic Sensor can only measure the variable quantity in magnetic field, it is impossible to measure
Absolute geomagnetic field；2）SPUID Magnetic Sensor needs to work in the cryostat for be inoculated with liquid helium, therefore entirely
Magnetic sensor is by liquid helium in cryostat（Liquid）Limitation, it is impossible to arbitrarily rotate, in order to avoid liquid helium is rocked, cause temperature
Fluctuation, disturbance means work, therefore SQUID sensors can only work under vertical static laying state.
Magnetic field is vector.The orthogonal Magnetic Sensor of three axles is respectively defined as X, Y, Z axis Magnetic Sensor, and each axial magnetic sensor is surveyed
What is obtained is projection of the magnetic vector in the axle, i.e. magnetic-field component.Therefore, the preferable orthogonal Magnetic Sensor of three axles can obtain magnetic
Three quadrature components of field.If surveying the magnetic field that some is constant with the orthogonal Magnetic Sensor of three axles, that is, need to make the constant magnetic
Orthogonal with three axles Magnetic Sensor is into arbitrary angle.The total magnetic field value synthesized by three-axle magnetic field componentIt is exactly the magnetic field intensity of the stationary magnetic field at any angle, this intensity is invariable.
Calibrating three-axle magnetic sensor calibration method is namely based on the orthogonal Magnetic Sensor measurement any angle stationary magnetic field of three axles, and it synthesizes total
What magnetic field kept this invariable principle to carry out.Therefore, calibrating three-axle magnetic sensor method must is fulfilled for three below bar
Part：
1）Need a stationary magnetic field；
2）Stationary magnetic field Magnetic Sensor orthogonal with three axles can keep any angle；
3）By arbitrarily changing the angle of stationary magnetic field Magnetic Sensor orthogonal with three axles, the orthogonal Magnetic Sensor of three axles is obtained each
The output of axle.
The present invention is the characteristics of for SQUID magnetic sensors, and meets the demarcation original of the orthogonal Magnetic Sensor of three axles
Under the precondition of reason, based on the principle that synthesis total magnetic field is constant, by parametric solution, the school of the orthogonal Magnetic Sensor of three axles is obtained
Quasi- parameter.The calibration parameter of the orthogonal Magnetic Sensor of three axles includes the field voltage conversion coefficient of the axle of X, Y, Z tri-, and X-axis is relative to Z's
Angular error, angular error of the Y-axis relative to X-Z faces.With reference to embodiment and accompanying drawing, the present invention is described in detail.
Embodiment one
The present embodiment provides a kind of orthogonal SPUID of three axles（SQUID）The caliberating device of magnetometer, such as schemes
Shown in 1a, the caliberating device 100 includes：Signal generator 110, coil 120, cryostat 130, rotating mechanism 140（Do not scheme
Show）, lock-in amplifier 150.
The signal generator 110 produces the sinusoidal signal of selected frequency and setting amplitude.The sinusoidal signal is used as friendship
Stream magnetic field excitation can make coil produce AC constant magnetic field, and the frequency and amplitude of wherein sinusoidal signal can be by signal hair
What raw device was flexibly set, but the frequency and amplitude of sinusoidal signal are once set at, the magnetic field that AC signal excitation is produced is exactly
Amplitude（Peak value）Constant AC magnetic field.Because SQUID Magnetic Sensors can only measure Absolute geomagnetic field, therefore use Helmholtz's line
Circle introduces AC constant magnetic field and not only meets the stationary magnetic field that the orthogonal SQUID Magnetic Sensors of three axles of demarcation need, and also solves
The problem of SQUID Magnetic Sensors can only measure Absolute geomagnetic field.
The coil 120 is connected with the signal generator 110, and constant amplitude is produced under the driving of the sinusoidal signal
AC magnetic field.Further, as shown in Fig. 2 a to Fig. 2 d, the coil 120 includes first side coil 121, second side line
Circle 122 and connecting rod 123；The connecting rod 123 is built-in with connecting line, one end of the connecting line and the first side coil
121 are electrically connected, and the other end is electrically connected with the second side coil 122.The first side coil 121 and second side coil
122 shape is identical；The first side coil 121 and second side coil 122 are circular coil, square coil, helical
Type coil, oval type coil or irregular shape coil；The protection model of the first side coil 121 and second side coil 122
Enclose and be not limited to its shape.The first side coil 121 and second side coil 122 are Helmholtz coil.In order to meet line
Circle can produce the requirement in alternating constant magnetic field with Arbitrary Rotation, and the coil turn of the coil must be passed with SQUID
It is wound centered on sensor, so when coil rotates, it arbitrarily puts equivalent on a sphere.Helmholtz coil
（Helmholtz coil）It is a kind of device for manufacturing small range region uniform magnetic field.Because Helmholtz coil has opening character
Other instruments easily can be inserted in Helmholtz coil or removed Helmholtz coil, can also directly regard by matter
Feel observation, so, Helmholtz coil is the device that Physical Experiment is often used.Because of German physicist's Herman Feng Haimu
Hereby name suddenly.Alternating current is loaded in Helmholtz coil, Shi Qi centers local produces uniform AC magnetic field, and this is uniform
Space where the space covering SPUID three axis magnetometer in region.
SPUID three axis magnetometer built in the cryostat 130, for placing superconductive quantum interference
Cryogenic liquid is perfused with device three axis magnetometer, cryostat 130, for maintaining the axle magnetic strength of SPUID three
The operating temperature of meter.
The rotating mechanism 140 is used to install the coil 120 and the fixed cryostat 130, makes the phase of coil 120
Adjusted for the SPUID three axis magnetometer in horizontal plane and vertical plane with any angle, described super
Lead the AC magnetic field that uniform constant amplitude is produced around quantum interference device three axis magnetometer.The cryostat 130 exists
Fixed form on the rotating mechanism 140 according to the structure of rotating mechanism and can be actually needed and suitably be set
Meter.Centered on SQUID three axis magnetometers region, the rotating mechanism 140 drives Helmholtz coil in the center
Domain is rotated, and the AC magnetic field of uniform frequency and constant amplitude is produced in the central area.The rotating mechanism 140 is in level
Plane and the rotatable device of vertical plane, it realizes drive Helmholtz coil and rotated, and makes Helmholtz coil both can be with
, can also be in vertical plane Shangrao where cryostat 130 around the 360 degree of rotations in the horizontal plane of cryostat 130
Central point carries out the rotation of 0~180 degree.The present invention can realize the change at any angle of AC magnetic field by rotating mechanism 140,
So as to coordinate correcting algorithm, realize that orthogonality is corrected.
Further, as shown in Fig. 2 a to Fig. 2 d, the rotating mechanism 140 includes：Support 141, base 142, rotating disk
143, rotary shaft 144.
The support 141 is used to vertically fix the cryostat 130, makes the superconduction being located in the cryostat
Quantum interference device three axis magnetometer is static.The support 141 is hollow cylinder or at least 2 pillars, it is all be that by it is solid
Determine cryostat and do not influence the structure of any body of rotating mechanism normal work to be included in support of the present invention
In the range of.Cryostat 130 is placed in the inner space that the support 141 is constituted enough, and the periphery of support 141 is without auxiliary machine
Structure, the inwall of support 141 directly supports thermostatic container, or the inwall of support 141 is provided with the part for supporting thermostatic container.By adjusting
The upper-lower height of support 141 or cryogenic thermostat container 130 is saved, SQUID sensor probes can be caused to be placed on the coil 120
The center in the test magnetic field of composition.The support 141 can accommodate support cryostat for spheroid, cylinder etc. are any
130 and the body of external rotating disk, i.e. the protection domain of support 141 is not limited to several body classes enumerated described in the present embodiment
Type.SPUID three axis magnetometer is arranged at cryostat 130 by the present invention, and cryostat 130 is fixed
It is arranged in support 141, because support is changeless, so the Superconducting Quantum in cryostat 130 relates to device spy
Head is also fixed.The support 141 can use the cylinder of circular hollow to realize, to improve mechanical strength, but the branch
Frame 141 realizes that structure includes but is not limited to the cylinder of circular hollow.The present invention can realize that sensor is static using pillar,
Arbitrary Rotation of the coil on horizontal plane and vertical plane can be realized using rotating disk and rotary shaft, SQUID is solved
Sensor is because can only vertical static placement issue using liquid helium.The present invention considers SQUID sensors can only vertical remains stationary
The factor of state placement work, therefore devise what the rotating mechanism that vertically and horizontally can arbitrarily rotate produced to make coil
Alternating constant magnetic field around SQUID sensors with Arbitrary Rotation, the work side rotated with traditional sensor around stationary magnetic field
Formula is entirely different.
The fixed support 141 of the support of base 142.
The rotating disk 143 is socketed on the support 141, is rotated in the horizontal plane around the support 141, while band
The coil 120 is moved around the support 141 in the horizontal plane with Arbitrary Rotation；The rotary shaft 144 is arranged at described
The edge of rotating disk 143, it is public with any angle with rotating disk 143 in the horizontal plane on a vertical plane with any angle rotation
Turn；The coil 120 is installed in the rotary shaft 144, is produced around the SPUID three axis magnetometer
The AC magnetic field of the constant amplitude adjusted on horizontal plane and vertical plane with any angle.The coil 120 is installed on described
In rotary shaft 144, specifically, the center of the connecting rod 123 is fixed in the rotary shaft 144.The rotating disk 143 can be with
For circle, rectangle, square, ellipse or symmetrical irregular shape, or other that can realize rotation are any
Shape, the protection domain of rotating disk of the present invention is not limited to its shape.When rotating disk 143 is set on the horizontal level,
Coil 120 can realize that horizontal plane rotates around support 141, and the rotary shaft 144 for being arranged at the both sides of rotating disk 143 can be with moving-wire
Circle 120 realizes the rotation in vertical plane, and rotating mechanism 140 realizes the rotation at any angle around a point.
Coil of the present invention is arranged on rotating mechanism, and support can be surrounded with rotating mechanism in horizontal plane
On with any angle（360 degree）Rotation, can also with rotating mechanism in vertical plane with Arbitrary Rotation.Pass through the rotation
Mechanism, coil can on SQUID three axis magnetometers rate of loading it is constant and only change the magnetic field of angle.Rotation of the present invention
The protection domain of mechanism is not limited to several implementations that the present embodiment is enumerated, every to realize that coil encloses according to prior art
The rotating mechanism rotated around cryogenic thermostat container in any two vertical plane with the angle of any range is included in this hair
Within bright protection domain.With reference to any two vertical plane（Such as horizontal plane and vertical plane）Inside rotate at any angle, this
Invention realizes excitation field and produced around SQUID three axis magnetometers to rotate at any angle, to produce the number of quadrature alignment
According to.In order that obtaining angular adjustment in space has certain uniformity and completeness（I.e. at equal intervals in the case of, measure regulation angle
In degree, the more uniform negative whole three-dimensional regulation space of covering of energy, while various angles can be covered, that is, completeness is met so that ginseng
It is smaller that number calculates solution error）, it is desirable to coil in the horizontal plane can 360 degree of regulations, on the vertical plane the regulation model with 180 degree
Enclose.
Coil is during vertical plane rotates, and due to being stopped by support, coil can adjust on a vertical plane
Angle can be restricted, there is the blind area of angular adjustment, it is impossible to complete the angled regulation of institute in the range of 0~180 degree, especially
It is coil connecting rod it is longer, the adjustable angle of coil is smaller, and the stop by posts bottom is more.Therefore, the present invention exists
On the basis of original design, the solution of angular adjustment blind area is added, to meet the requirement that magnetic field angle adjusts completeness.
Pillar will also result in the blind area of coil angle regulation due to being relatively large in diameter in itself, so adjusting passed through region in coil, make
With thinner pillar preferably.The solution of the increased angular adjustment blind area of the present invention includes：
1）As shown in Figure 3 a, it is upper and lower designing two portions by 141 points of support, is referred to as upper bracket 1411 and lower carriage
1412, the coupling part easily combination of upper bracket 1411 and lower carriage 1412 is also easily taken apart；The base 142 of yi word pattern structure is from described
The bottom of lower carriage 1412 supports the support 141；The length of connecting rod 123 in coil 120 is more than the upper bracket 1411
Height.The upper bracket 1411 and lower carriage 1412 are taken apart, coil 120 is rotated to 180 degree（That is first side coil exists
The surface or underface of the upper bracket）, then lower carriage is passed through the first side coil or second side coil and institute
State upper bracket to be connected, now the anglec of rotation adjustable range of coil 120 is as shown in Figure 3 b.I.e. when the lower carriage is through described the
When side planar coil or second side coil are connected with the upper bracket, the coil realizes the setting that the anglec of rotation is 180 degree.
2）As shown in Figure 3 c, base 142 is set to inverted T-type structure, the base of inverted T-type structure is arranged at the bottom of the support
Portion, the support is supported from frame bottom；Because the base of inverted T-type structure and the coupling part area of support 141 are small so that first
Side coil（Or second side coil）The bottom of support can be extend into when rotated, and now the rotation angle range of coil is big
Stop in by support（That is yi word pattern base）In the case of coil rotation angle range, reduce coil on a vertical plane
Angular adjustment blind area.Although the base of inverted T-type structure reduces the angular adjustment blind area of coil, the bottom of the inverted T-type structure
Seat still can stop coil, coil can not be rotated to 180 degree, and further blind area solution is proposed to this present invention,
I.e. as shown in Figure 3 d, the base and support 141 for making inverted T-type structure separate assembling, the base of inverted T-type structure and the company of support 141
Socket part point easily combination is also easily taken apart, and the length of the connecting rod in the coil is more than the height of the upper bracket；Now will be inverted T shaped
The base of structure is taken apart with support 141, coil is rotated to 180 degree, then the base of inverted T-type structure is passed through into the first side
Coil（Or second side coil）Center section be connected with the support 141, coil is thus compensate for completely to be rotated
To 180 blind area, measurement data of the coil in the case of the 180 degree and its neighbouring angle can be measured, is ideally solved
The problem of rotation blind area of coil, realize the angular adjustment of coil 0~180 degree on a vertical plane.I.e. when the inverted T shaped knot
When the center section of the base of structure through the first side coil or second side coil is connected with the support, the coil
Realize the setting that the anglec of rotation is 180 degree.Wherein, the base of inverted T-type structure can also be replaced by the base of the type of falling ∏ structure, such as
Shown in Fig. 3 e and 3f, the type of the falling ∏ base is arranged at the bottom or both sides of the support, and the branch is supported from the bottom of support
Support described in frame or lateral support from support.The operation principle for making up coil angle regulation blind area of the base of the type of falling ∏ structure
It is identical with the base of inverted T-type structure, but be still in actual applications inverted T-type structure base effects it is more excellent.
In a word, the purpose of above-mentioned measure is all the angle of the regulation of spread loop on a vertical plane as far as possible so that examination
The data for obtaining the three-axle magnetic field measurement under more different angle cases are tested, the precision of three shafting numbers demarcation is improved.Due to this hair
The bright algorithm for solving the parameter for demarcation is realized by the three-axle magnetic field component data detected under multiple different angles,
Therefore the three-axle magnetic field component data of test is more, and the angle difference of magnetic-field component is bigger, then the calibration result of acquisition is more accurate
Really.So, caliberating device of the present invention enables coil rotate to arbitrary angle as far as possible.But due to positioned vertical
The stop of the pillar of SQUID thermostats, the limited angle that coil rotates in vertical direction（Occur in that blind area）, therefore, this hair
Bright especially addition of can penetrate the second coil of pillar, realize extension of the rotating mechanism in vertical direction scheduling adjustment ability, more
The blind area of angular adjustment is mended, realizes that coil is adjusted at any angle as far as possible.
The lock-in amplifier 150 is connected with the signal generator 110, will demarcation under the reference of the sinusoidal signal
During the SPUID three axis magnetometer that is located in the cryostat 130 respond the knot of the AC magnetic field
Fruit detects.According to the characteristics of SPUID SQUID three axis magnetometers, AC magnetism is loaded in parallel coil
, using lock-in amplifier detect three axis magnetometer response, obtain tri- direction magnetometers of X, Y, Z output voltage, Vx,
Vy、Yz.Again revolving coil, selectes a position, repeats above-mentioned detection, records magnetometer output voltage.Using least square
Deng parametric solution method, try to achieve the field voltage transfer rate of three axis magnetometer, and three axis magnetometer angular error, complete magnetic strength
The demarcation of meter.By the measurement data of multiple angles, acquisition data are more, and calibrated and calculated is more accurate.
The operation principle of the caliberating device of SPUID three axis magnetometer of the present invention is：Utilize signal
Generator produces the sinusoidal signal of selected frequency and setting amplitude, and last of the twelve Earthly Branches nurse is driven by one drive circuit using the sinusoidal signal
Suddenly hereby coil in pivot（That is SQUID three axis magnetometers region, or cryostat region）Generation amplitude is permanent
Fixed simple alternating current magnetic field.Three axis components in the simple alternating current magnetic field are detected by SQUID three axis magnetometers and zoom into electricity respectively
Press signal output.The voltage signal that SQUID three axis magnetometers are detected can be read out by a reading circuit, and input to lock
Phase amplifier.The voltage signal access lock-in amplifier of SQUID three axis magnetometers output, at the same time, for driving Hai Muhuo
Hereby the sinusoidal signal of the signal generator output of coil also accesses lock-in amplifier；Sinusoidal signal is used as ginseng by lock-in amplifier
Examine, the SQUID three axis magnetometer signal detections that the response Helmholtz coil of same frequency is encouraged come out.Pass through lock-in amplifier
The voltage data of detection is exactly the result that SQUID three axis magnetometers respond simple alternating current uniform magnetic field.
The angle of Helmholtz coil can be adjusted in horizontal plane rotation and vertical plane rotation using rotating mechanism, to change
Become the angle of uniform AC magnetic field and SQUID three axis magnetometers.An angle is often adjusted, a SQUID three axis magnetometer is recorded
The magnitude of voltage of output is detected through lock-in amplifier.
Any regulation angle, while avoiding adjusted angle in a plane, can obtain SQUID tri- under any angle
The data of axle magnetometer output.The data of acquisition are The more the better, and angle change scope is the bigger the better.
The AC magnetic field component detected according to SQUID three axis magnetometers under any angle is closed according to the constant principle in magnetic field
Into total magnetic field.The correction coefficient for obtaining SQUID three axis magnetometers is calculated by least-squares algorithm again.
The present embodiment additionally provides a kind of scaling method of SPUID three axis magnetometer, and the scaling method can
To be realized by caliberating device of the present invention, but the scaling method realizes that device includes but is not limited to mark of the present invention
Determine device.
As shown in Figure 1a, the scaling method includes：
The sinusoidal signal of selected frequency and setting amplitude is produced using a signal generator.
The AC magnetic field of coil generation constant amplitude is driven using the sinusoidal signal.The coil includes first side
Coil, second side coil and connecting rod；The connecting rod is built-in with connecting line, one end of the connecting line and first side
Planar coil is electrically connected, and the other end is electrically connected with the second side coil；The first side coil and second side coil are
Helmholtz coil.
SPUID is maintained using SPUID three axis magnetometer built in a cryostat
The operating temperature of three axis magnetometer.
The coil and the cryostat are installed using a rotating mechanism, make coil dry relative to the Superconducting Quantum
Relate to device three axis magnetometer to adjust with any angle in horizontal plane and vertical plane, in the axle of SPUID three
The AC magnetic field of uniform constant amplitude is produced around magnetometer.Further, the cryogenic thermostat is fixed using a support vertical
Device, makes the SPUID three axis magnetometer being located in the cryostat static；It is described using base support
Support；The base is yi word pattern, the inverted T shaped or type of falling ∏；The yi word pattern base or inverted T shaped base are arranged at the support
Bottom, support the support from frame bottom；The type of the falling ∏ base is arranged at the bottom or both sides of the support, from support
Bottom support the support or support the support from side face.It is socketed on using one on the support and in horizontal plane
The upper rotating disk rotated around the support drives the coil around the support in the horizontal plane with Arbitrary Rotation；Profit
With an edge for being arranged at the rotating disk, and on a vertical plane with any angle rotation, and in the horizontal plane with rotation
The rotary shaft that disk is revolved round the sun with any angle installs the coil, makes coil in SPUID three axis magnetometer week
The AC magnetic field for producing the constant amplitude adjusted on horizontal plane and vertical plane with any angle is enclosed, it is shown in Figure 4.It is described
The center of connecting rod is fixed in the rotary shaft, with the rotation and revolution band moving winding of rotary shaft in horizontal plane and vertical plane
On with Arbitrary Rotation.
Coil is during vertical plane rotates, and due to being stopped by support, coil can adjust on a vertical plane
Angle can be restricted, there is the blind area of angular adjustment, it is impossible to complete the angled regulation of institute in the range of 0~180 degree, especially
It is coil connecting rod it is longer, the adjustable angle of coil is smaller, and the stop by posts bottom is more.Therefore, the present invention exists
On the basis of original design, the solution of angular adjustment blind area is added, to meet the requirement that magnetic field angle adjusts completeness.
Adding the solution of angular adjustment blind area includes：
1）As shown in Figure 3 a, it is upper and lower designing two portions by 141 points of support, is referred to as upper bracket 1411 and lower carriage
1412, the coupling part easily combination of upper bracket 1411 and lower carriage 1412 is also easily taken apart；Base 142 is yi word pattern structure, a word
The base 142 of type structure supports the support 141 from the bottom of the lower carriage 1412；The length of connecting rod 123 in coil 120
Height of the degree more than the upper bracket 1411.The upper bracket 1411 and lower carriage 1412 are taken apart, coil 120 is rotated to
180 degree（I.e. first side coil is in the surface or underface of the upper bracket）, then lower carriage is passed through the first side
Coil or second side coil are connected with the upper bracket, and now the anglec of rotation adjustable range of coil 120 is as shown in Figure 3 b.
2）As shown in Figure 3 c, base 142 is set to inverted T-type structure, the base of inverted T-type structure is arranged at the bottom of the support
Portion, the support is supported from frame bottom；Because the base of inverted T-type structure and the coupling part area of support 141 are small so that first
Side coil（Or second side coil）The bottom of support can be extend into when rotated, and now the rotation angle range of coil is big
Stop in by support（That is yi word pattern base）In the case of coil rotation angle range, reduce coil on a vertical plane
Angular adjustment blind area.Although the base of inverted T-type structure reduces the angular adjustment blind area of coil, the bottom of the inverted T-type structure
Seat still can stop coil, coil can not be rotated to 180 degree, and further blind area solution is proposed to this present invention,
I.e. as shown in Figure 3 d, the base and support 141 for making inverted T-type structure separate assembling, the base of inverted T-type structure and the company of support 141
Socket part point easily combination is also easily taken apart, and the length of the connecting rod in the coil is more than the height of the upper bracket；Now will be inverted T shaped
The base of structure is taken apart with support 141, coil is rotated to 180 degree, then the base of inverted T-type structure is passed through into the first side
Coil（Or second side coil）Center section be connected with the support 141, coil is thus compensate for completely to be rotated
To 180 blind area, measurement data of the coil in the case of the 180 degree and its neighbouring angle can be measured, is ideally solved
The problem of rotation blind area of coil, realize the angular adjustment of coil 0~180 degree on a vertical plane.Wherein, inverted T-type structure
Base can also be replaced by the base of the type of falling ∏ structure, as shown in Fig. 3 e and 3f, the type of the falling ∏ base is arranged at the branch
The bottom or both sides of frame, support described in the lateral support from the bottom support support of support or from support.The type of falling ∏ structure
Base the operation principle for making up coil angle regulation blind area it is identical with the base of inverted T-type structure, but in actual applications still
Be so inverted T-type structure base effects it is more excellent.
Using the sinusoidal signal to examine, using a lock-in amplifier being connected with the signal generator by calibration process
The result that SPUID three axis magnetometer in the cryostat responds the AC magnetic field is detected
Come.
The present invention obtains multi-group data by rotation excitation magnetic field, multi-angle test SQUID three axis magnetometer results.Appoint
Meaning regulating winding position so that the direction for the uniform magnetic field vector being carried on magnetometer is arbitrarily adjusted, and direction change is not limited to
In a plane.Constantly regulate magnetic direction, often adjusts Primary field direction, magnetometer output of record, by multiple
Measurement, obtains multiple data, forms one group of data.As long as selected angle is not limited in approximately the same plane, so that it may use one
Group test data, by equation solution, realizes the solution of three axis magnetometer magnetic flux voltage conversion ratio and orthogonal angles difference, completes
The demarcation of SQUID magnetic sensors.
Embodiment two
The present embodiment provides the caliberating device and method of a kind of SPUID three axis magnetometer, itself and embodiment
The difference of caliberating device and method described in one is：Rotating mechanism described in embodiment one is band moving winding with the superconduction amount
With Arbitrary Rotation on horizontal plane and vertical plane centered on sub- interfered device three axis magnetometer；I.e. cryostat is quiet
Only motionless, coil rotates around cryostat on horizontal plane and vertical plane, shown in Figure 4.And described in the present embodiment
Rotating mechanism be band moving winding centered on the SPUID three axis magnetometer on a vertical plane with any
Angle rotates, and realizes that coil is dry relative to Superconducting Quantum with Arbitrary Rotation in the horizontal plane by driving cryostat
Relate to the regulation of device three axis magnetometer in the horizontal plane；I.e. cryostat rotates in the horizontal plane, and coil surrounds cryogenic thermostat
Device rotates on a vertical plane, shown in Figure 6.Described in rotation mode either described in embodiment one or embodiment two
Rotation mode, can realize the purpose of the present invention：1）Ensure SPUID three axis magnetometer in cryostat
In horizontal positioned；2）The amplitude perseverance that a direction can arbitrarily be adjusted is produced around SPUID three axis magnetometer
Fixed AC magnetic field.
As shown in Fig. 5 a to 5d, the rotating mechanism 500 includes fixed frame 510（It is not shown）, swivel bearing 520.Institute
Stating fixed frame 510 includes setting circular guideway 511 in the horizontal plane, the stuck-module 512 along circular guideway slip
With the armed lever 513 of the fixed circular guideway of support.The stuck-module 512 fixes the cryostat 130, and drives institute
Cryostat is stated in the horizontal plane with Arbitrary Rotation.The stuck-module 512 can lead to a cylindrical drum 515 or other
Part fixes the cryostat 130.The stuck-module 512 is led by parts such as roller bearing 514 or rollers along the circle
Rail is slided.The swivel bearing 520 is arranged on the armed lever 513, on a vertical plane with any angle rotation.The coil
120 are installed on the swivel bearing 520, and permanent to be built in low temperature on a vertical plane in the case where the rotation of swivel bearing drives
With Arbitrary Rotation centered on SPUID three axis magnetometer 600 in warm device 130；The coil is Hai Muhuo
Hereby coil.From Fig. 5 a into 5d as can be seen that the circular guideway 511 is in circular, the cryogenic thermostat fixed by stuck-module
Device is placed in the centre of circular guideway just, makes to be built in the SPUID three axis magnetometer position in cryostat
In the center of the circular guideway.The armed lever 513 includes left arm bar and has armed lever, and left arm bar is symmetrically set in circle with right arm bar
The both sides of guide rail.The swivel bearing 520 includes anticlockwise bearing and right rotation bearing, and anticlockwise bearing is arranged at left arm bar
On, right rotation bearing is arranged on right arm bar, the length phase of anticlockwise bearing and right rotation bearing apart from the center of circular guideway
Together.
The characteristics of present invention can only survey relative magnetic field for sensor employs Helmholtz coil and produces constant amplitude
AC magnetic field.The problem of present invention is for that will realize any variable magnetic field of angle, employs and carries out two frees degree to magnetic field
Regulation scheme, i.e., stationary magnetic field is realized by any angular adjustment on any angular adjustment on vertical plane and horizontal plane
Angle relative to the SPUID three axis magnetometer is arbitrarily variable.Wherein, the angular adjustment on vertical plane
The present invention is completed by the Helmholtz coil of rotating parallel.Angular adjustment on horizontal plane, by the present invention in that coil around
360 degree of rotations of cryostat and make cryostat allow 360 degree of rotations, two approach to realize in rail plate.The present invention
For because SQUID sensings work in the cryostat of built-in liquid helium, cryostat can only keep level, and visit
The problem of head is placed vertically downward, employs support（Embodiment one）And fixed support（Embodiment two）Two ways is solved.
The advantage of scheme described in the embodiment of the present invention one is SPUID three axis magnetometer and cryostat
Remain motionless, have the disadvantage the evasive action for needing to carry out angular adjustment blind area when coil rotates on a vertical plane.This hair
The advantage of scheme described in bright embodiment two be coil in the no blind area of regulation of horizontal plane and vertical plane, be truly realized exchange
Magnetic field is adjusted at any angle relative to SPUID three axis magnetometer, has the disadvantage the angular adjustment needs of horizontal plane
Circular guideway in rotation cryostat, but fixed support can ensure the stabilization of liquid level in cryostat, maintain spy
Head is vertically downward（So that probe is immersed in low-temperature liquid helium or liquid nitrogen all the time）.SQUID sensors involved in the present invention are to contain
Lid high-temperature superconductor SQUID's and low-temperature superconducting SQUID, therefore cryogenic liquid in the cryostat includes liquid helium（4.2K,
For low temperature SQUID）And liquid nitrogen（77K, for high temperature SQUID device）.
The present invention is directed to the particularity of superconduction SQUID sensors, solves the SQUID sensors that conventional method can't resolve
Three axle orthogonality problem of calibrating.The present invention obtains an amplitude using a Helmholtz coil by way of revolving coil
The AC magnetic field rotated around SQUID three axis magnetometers that constant, direction can arbitrarily be adjusted, realizes SQUID three axis magnetometers
Transmission coefficient is demarcated and orthogonality verification.Rotation present invention, avoiding SQUID magnetometers probe relative to cryostat, is protected
The stability of liquid in cryostat is demonstrate,proved, the liquid fluctuation evaded in cryostat is made to SQUID magnetometers probe
Into influence, while Absolute geomagnetic field can not be measured and be difficult with the problem of stationary magnetic field is demarcated for SQUID magnetometers, use
The method of exchange demarcation, and by way of lock phase amplification detection, data obtains needed for being realized using least-squares algorithm
Take, realize the calculating of correction coefficient.
In summary, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of caliberating device of SPUID three axis magnetometer, it is characterised in that the superconducting quantum interference device
The caliberating device of part three axis magnetometer includes：
Signal generator, produces the sinusoidal signal of selected frequency and setting amplitude；
Coil, is connected with the signal generator, and the AC magnetic field of constant amplitude is produced under the driving of the sinusoidal signal；
Cryostat, built-in SPUID three axis magnetometer, for maintaining the axle magnetic of SPUID three
The operating temperature counted by force；
Rotating mechanism, for installing the coil and the cryostat, makes coil relative to the superconducting quantum interference device
Part three axis magnetometer is adjusted in horizontal plane and vertical plane with any angle, in the axle magnetic strength of SPUID three
The AC magnetic field of uniform constant amplitude is produced around meter；
The rotating mechanism includes：Support, for vertically fixing the cryostat, makes to be located in the cryostat
SPUID three axis magnetometer is static；Base, supports the support；Rotating disk, is socketed on the support, in water
Rotated in plane around the support, while driving the coil around the support in the horizontal plane with Arbitrary Rotation；
Rotary shaft, is arranged at the edge of the rotating disk, on a vertical plane with any angle rotation, in the horizontal plane with rotating disk with
Any angle revolves round the sun；The coil is installed in the rotary shaft, around the SPUID three axis magnetometer
Produce the AC magnetic field of the constant amplitude adjusted on horizontal plane and vertical plane with any angle；
Lock-in amplifier, is connected with the signal generator, will surpass under the reference of the sinusoidal signal described in calibration process
The result for leading the quantum interference device three axis magnetometer response AC magnetic field is detected.
2. the caliberating device of SPUID three axis magnetometer according to claim 1, it is characterised in that：It is described
Coil includes first side coil, second side coil and connecting rod；The connecting rod is built-in with connecting line, the connecting line
One end is electrically connected with the first side coil, and the other end is electrically connected with the second side coil；The center of the connecting rod
It is fixed in the rotary shaft；The first side coil and second side coil are Helmholtz coil.
3. the caliberating device of SPUID three axis magnetometer according to claim 2, it is characterised in that：It is described
Support includes upper bracket and lower carriage, and the coupling part of the upper bracket and lower carriage is easily combined and easily taken apart；The base is
Yi word pattern structure, the base of yi word pattern structure supports the lower carriage from the bottom of the lower carriage；Connection in the coil
The length of bar is more than the height of the upper bracket；When the lower carriage through the first side coil or second side coil with
When the upper bracket is connected, the coil realizes the setting that the anglec of rotation is 180 degree.
4. the caliberating device of SPUID three axis magnetometer according to claim 2, it is characterised in that：It is described
Base separates assembling with support, and base is easily combined with the coupling part of support and easily taken apart；The base is inverted T-type structure, T
The base of type structure is arranged at the bottom of the support, and the support is supported from frame bottom；Connecting rod in the coil
Length is more than the height of the support；When the base of the inverted T-type structure passes through the first side coil or second side line
When the center section of circle is connected with the support, the coil realizes the setting that the anglec of rotation is 180 degree；When the inverted T shaped knot
When the base of structure replaces with the base of the type of falling ∏ structure, the type of the falling ∏ base is arranged at the bottom or both sides of the support, from
Support described in the bottom support support of support or the lateral support from support.
5. the caliberating device of SPUID three axis magnetometer according to claim 1, it is characterised in that：It is described
The structure of rotating mechanism is replaced with：
Fixed frame, including circular guideway in the horizontal plane, the stuck-module along circular guideway slip and support are set
The armed lever of the fixed circular guideway；The stuck-module fixes the cryostat, and drives the cryostat to exist
With Arbitrary Rotation on horizontal plane；
Swivel bearing, is arranged on the armed lever, on a vertical plane with any angle rotation；The coil is installed on the rotation
Rotating shaft is held, and in the case where the rotation of swivel bearing drives on a vertical plane with the SPUID three axis magnetometer
Centered on Arbitrary Rotation；The coil is Helmholtz coil.
6. a kind of scaling method of SPUID three axis magnetometer, it is characterised in that the scaling method includes：
The sinusoidal signal of selected frequency and setting amplitude is produced using a signal generator；
The AC magnetic field of coil generation constant amplitude is driven using the sinusoidal signal；
The axle of SPUID three is maintained using SPUID three axis magnetometer built in a cryostat
The operating temperature of magnetometer；
The coil and the cryostat are installed using a rotating mechanism, make coil relative to the superconducting quantum interference device
Part three axis magnetometer is adjusted in horizontal plane and vertical plane with any angle, in the axle magnetic strength of SPUID three
The AC magnetic field of uniform constant amplitude is produced around meter；
Wherein, the coil and the cryostat are installed using rotating mechanism, coil is surrounded the superconductive quantum interference
The detailed process that device three axis magnetometer is adjusted in horizontal plane and vertical plane with any angle includes：Utilize a support vertical
The fixed cryostat, makes the SPUID three axis magnetometer being located in the cryostat static；Profit
The support is supported with a base；Utilize a rotation for being socketed on the support and being rotated in the horizontal plane around the support
Coil described in driven by rotary disc is around the support in the horizontal plane with Arbitrary Rotation；The rotating disk is arranged at using one
Edge, and on a vertical plane with any angle rotation, and the rotation revolved round the sun in the horizontal plane with rotating disk with any angle
Axle installs the coil, coil is produced around the SPUID three axis magnetometer in horizontal plane and vertically flat
The AC magnetic field of the constant amplitude adjusted on face with any angle；
Using the sinusoidal signal as reference, using a lock-in amplifier being connected with the signal generator by institute in calibration process
The result for stating the SPUID three axis magnetometer response AC magnetic field is detected.
7. the scaling method of SPUID three axis magnetometer according to claim 6, it is characterised in that described
The installation process of coil includes：
The coil includes first side coil, second side coil and connecting rod；The connecting rod is built-in with connecting line, described
One end of connecting line is electrically connected with the first side coil, and the other end is electrically connected with the second side coil；Described first
Side coil and second side coil are Helmholtz coil；
The center of the connecting rod is fixed in the rotary shaft, with the rotation and revolution band moving winding of rotary shaft in horizontal plane and
With Arbitrary Rotation on vertical plane.
8. the scaling method of SPUID three axis magnetometer according to claim 7, it is characterised in that described
Base supports the mode of the support to include：
The support is split as upper bracket and lower carriage, and the coupling part of the upper bracket and lower carriage is easily combined and easily taken apart；
The base is yi word pattern structure, and the base of yi word pattern structure supports the lower carriage from the bottom of the lower carriage；The line
The length of connecting rod in circle is more than the height of the upper bracket；
The upper bracket and lower carriage are taken apart, first side coil is rotated to the surface or underface of the upper bracket,
Lower carriage is connected through the second side coil or first side coil with upper bracket, realizes that the coil anglec of rotation is
The regulation of 180 degree.
9. the scaling method of SPUID three axis magnetometer according to claim 7, it is characterised in that described
Base supports the mode of the support to include：
The base separates assembling with support, and base is easily combined with the coupling part of support and easily taken apart；
The base is inverted T-type structure, and the base of inverted T-type structure is arranged at the bottom of the support, and institute is supported from frame bottom
State support；The length of connecting rod in the coil is more than the height of the support；
The base and support of inverted T-type structure are taken apart, first side coil is rotated to the surface or underface of the support,
The center section of the base of inverted T-type structure through the second side coil or first side coil is connected with the support,
Realize the regulation that the coil anglec of rotation is 180 degree；
When the base of the inverted T-type structure replaces with the base of the type of falling ∏ structure, the type of the falling ∏ base is arranged at the branch
The bottom or both sides of frame, support described in the lateral support from the bottom support support of support or from support.
10. the scaling method of SPUID three axis magnetometer according to claim 6, it is characterised in that profit
The coil and the cryostat are installed with rotating mechanism, coil is surrounded the axle magnetic strength of SPUID three
The detailed process adjusted with any angle in horizontal plane and vertical plane is counted to replace with：
The cryostat is fixed using a fixed frame；The fixed frame includes setting circle in the horizontal plane to lead
The armed lever of rail, the stuck-module slided along the circular guideway and the fixed circular guideway of support；The stuck-module is fixed
The cryostat, and the cryostat is driven in the horizontal plane with Arbitrary Rotation；
The swivel bearing being arranged at using one on the armed lever installs the coil, the coil is existed with the rotation of swivel bearing
With Arbitrary Rotation centered on the SPUID three axis magnetometer on vertical plane；The coil is last of the twelve Earthly Branches nurse
Hereby coil suddenly.
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| CN105203973B (en) * | 2015-09-18 | 2018-05-01 | 中国科学院电工研究所 | A kind of weak magnetic detection device |
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