CN106772180A - A kind of optical pumped magnetometer gradient tolerance limit measurement apparatus - Google Patents
A kind of optical pumped magnetometer gradient tolerance limit measurement apparatus Download PDFInfo
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- CN106772180A CN106772180A CN201611186937.8A CN201611186937A CN106772180A CN 106772180 A CN106772180 A CN 106772180A CN 201611186937 A CN201611186937 A CN 201611186937A CN 106772180 A CN106772180 A CN 106772180A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
Abstract
The invention provides a kind of optical pumped magnetometer gradient tolerance limit measurement apparatus, mainly including horizontal base, gradient generating coils, horizontal brace rod, air-bubble level, connecting rod level(l)ing device, optical pumping probe installs fixture, laser range finder, Precision Current Component and control module；The size of current that control module is exported according to needed for probe positions, probe size, coil turn, coil radius these parameter presets calculating produce specific magnetic gradient, and control Precision Current Component to export specific currents to gradient generating coils by USB interface；Gradient generating coils are arranged on horizontal base and by air-bubble level A adjusting positions, and space produces magnetic gradient to gradient generating coils around；Horizontal brace rod is provided with optical pumping probe installs fixture, and adjusts horizontal brace rod and gradient generating coils diameter parallel by air-bubble level A, air-bubble level and connecting rod level(l)ing device.
Description
Technical field
The present invention relates to the technical indicator measurement apparatus of optical pumped magnetometer, more particularly to a kind of optical pumped magnetometer gradient tolerance limit
Measurement apparatus.
Background technology
Optical pumped magnetometer is the Zeeman level division occurred in external magnetic field based on operation material atom, with reference to optical action
The magnetometer succeeded in developing with electromagnetic induction phenomenon, has been widely used in ground physical prospecting, airborne geophysical prospecting, airborne antisubmarine, ferromagnetic
Property material detection etc. field.
The magnetic resonance signal size of optical pumped magnetometer is influenceed by external magnetic field gradient, and the bigger resonance signal of external magnetic field gradient is more
It is small, magnetometer hydraulic performance decline can be caused or even work abnormal.Gradient tolerance limit is that reaction optical pumped magnetometer external magnetic field gradient is held
It is to carry out the index that magnetic method operation must take into consideration at big gradient mining area (such as iron ore) by the technical indicator of ability.Part magnetometer
The technical manual of producer can refer to gradient tolerance limit, but not specify the method for testing of gradient tolerance limit.
Domestic relevant unit's (metering institute Fragrance Hill weak magnetic laboratory, 710 magnetics one-level measuring stations etc.) is for ladder
Spend the special test method and apparatus of tolerance limit.The works of Cambridge University Dmitry Budker《Optical Magnetometry》
In be referred to the definition of optical pumped magnetometer gradient tolerance limit, but do not tell about specific method of testing and device.
The content of the invention
It is an object of the invention to overcome the shortcomings of that prior art is present, and a kind of optical pumped magnetometer gradient tolerance limit is provided and is surveyed
Amount device, the measurement of its gradient tolerance limit technical indicator that can complete optical pumped magnetometer, with simple to operate, high degree of automation
The advantages of, fill up the domestic blank in the field.
The purpose of the present invention is completed by following technical solution.This optical pumped magnetometer gradient tolerance limit measurement dress
Put, mainly including horizontal base, gradient generating coils, horizontal brace rod, air-bubble level, connecting rod level(l)ing device, light
Pump probe installs fixture, laser range finder, Precision Current Component and control module；Control module according to probe positions, probe size,
These parameter presets calculating of coil turn, coil radius produces the size of current of output needed for specific magnetic gradient, and is connect by USB
Mouth control Precision Current Component exports specific currents to gradient generating coils；Gradient generating coils are arranged on horizontal base and pass through
Air-bubble level A adjusting positions, space produces magnetic gradient to gradient generating coils around；Horizontal brace rod is provided with optical pumping probe
Installs fixture, and horizontal brace rod and gradient are adjusted by air-bubble level A, air-bubble level and connecting rod level(l)ing device
Generation coil axis is parallel；Optical pumping probe to be measured is connected and in optical pumping probe installs fixture with magnetometer main frame to be measured,
The distance that gradient generating coils center is popped one's head in optical pumping to be measured is measured by laser range finder.
The control module according to |input paramete comprising turn number N, coil radius R, probe region C (OA, r,
OB), setting Grad dT0, output parameter includes actual gradient scope dT in output current I, region C0、dT1, finally ensure area
Actual magnetic gradient minimum value in the C of domain is more than or equal to dT0。
Beneficial effects of the present invention are：The measurement of the gradient tolerance limit technical indicator of optical pumped magnetometer can be completed, with behaviour
The advantages of making simple, high degree of automation, has filled up the domestic blank in the field.
Brief description of the drawings
Fig. 1 is optical pumped magnetometer gradient tolerance limit measurement apparatus structured flowchart；
Fig. 2 is that gradient tolerance limit measures implementation steps；
Fig. 3 is magnetic gradient computation model；
Fig. 4 is TT＆C software input/output argument graph of a relation.
In figure, 1 represents horizontal base, and 2 represent that gradient generating coils, 3 represent that horizontal brace rod, 4 represent air-bubble level
A, 5 connecting rod for indication level(l)ing devices, 6 represent that optical pumping probe installs fixture, 7 represent that laser range finder, 8 represent precision current
Source, 9 represent that control module, 10 represent that air-bubble level B, 11 represent that optical pumping probe to be measured, 12 represent magnetometer main frame to be measured.
Specific embodiment
Detailed introduction is done to the present invention below in conjunction with accompanying drawing：
This optical pumped magnetometer gradient tolerance limit measurement apparatus of the present invention, it is main to occur including horizontal base 1, gradient
Coil 2, horizontal brace rod 3, air-bubble level 4, connecting rod level(l)ing device 5, optical pumping probe installs fixture 6, laser ranging
Instrument 7, Precision Current Component 8 and control module 9；Control module 9 according to probe positions, probe size, coil turn, coil radius this
A little parameter presets calculate the size of current for producing output needed for specific magnetic gradient, and control Precision Current Component 8 defeated by USB interface
Go out specific currents to gradient generating coils 2；Gradient generating coils 2 are arranged on horizontal base 1 and are adjusted by air-bubble level A4
Section position, space produces magnetic gradient to gradient generating coils 2 around；Horizontal brace rod 3 is provided with optical pumping probe installs fixture 6,
And horizontal brace rod 3 is adjusted with gradient generation by air-bubble level A4, air-bubble level B and connecting rod level(l)ing device 5
The diameter parallel of coil 2；Optical pumping probe 11 to be measured is connected and installed in optical pumping probe installs fixture 6 with magnetometer main frame 12 to be measured
In (optical pumping probe installs fixture 6 can be adjusted by probe positions adjusting means), gradient is measured by laser range finder 7 and is sent out
Distance of the raw center of coil 2 to optical pumping to be measured probe 11.Control module 9 includes turn number N, coil radius according to |input paramete
R, probe region C (OA, r, OB), setting Grad dT0, output parameter includes actual gradient in output current I, region C
Scope dT0、dT1, the final actual magnetic gradient minimum value ensured in the C of region is more than or equal to dT0。
In Fig. 1, optical pumping probe 11 to be measured and magnetometer main frame 12 to be measured are optical pumped magnetometer to be measured.Horizontal base 1 is completed
The level of gradient generating coils 2 is fixed, and connecting rod level(l)ing device 5, air-bubble level ensures that horizontal brace rod 3 is in horizontal plane
Parallel with coil axis, optical pumping probe installs fixture 6 completes the installation of optical pumping probe 11 to be measured, and laser range finder 7 completes coil
Center to optical pumping to be measured probe 11 range measurement, control module 9 is according to probe positions, probe size, coil turn, coil half
The parameter presets such as footpath calculate the size of current for producing output needed for setting magnetic gradient, and control Precision Current Component 8 by USB interface
Output specific currents, it is ensured that the magnetic field gradient minimum value of 11 regions of optical pumping probe to be measured is more than setting magnetic gradient.
Fig. 2 is that gradient tolerance limit measures implementation steps.Wherein, measurement is ready to complete the connection of pertinent instruments；Base level is adjusted
Section can ensure the axis of coil in the horizontal plane；Connecting rod Level tune ensures that connecting rod is in horizontal plane, with coil
Diameter parallel；After probe is fixed on fixture, the luminous point for adjusting laser range finder is extremely popped one's head in, record lower coil center to probe
Distance.Control module 9 can be calculated according to parameter presets such as turn number N, coil radius R, probes region (OA, r, OB)
The size of current of output needed for specific magnetic gradient is produced, and controls Precision Current Component 8 to export specific currents I by USB interface；
After producing given magnetic field gradient, the working condition of magnetometer is checked, magnetic force is observed again after increasing gradient if working properly
The working condition of instrument, last setting magnetic field gradient value is the gradient tolerance limit of magnetometer to be measured if work is abnormal.
Fig. 3 is magnetic gradient computation model.As the origin of coordinates, axis direction is Z to central O with coil, and vertical is X,
Horizontal direction is Y, when coil turn be N, coil radius R, supply current be I when, can be calculated by Biot-Savart law
The magnetic vector of space arbitrfary point (x, y, z)For,
Wherein, μ0It is the magnetic conductivity in vacuum, θ is around the coil integration independent variable of a week.
Resultant field B is along the gradient of Z-direction in probe regionThe gradient minimum value of generation is
Fig. 4 is TT＆C software input/output argument graph of a relation.The |input paramete of TT＆C software includes turn number N, coil
Radius R, probe region C (OA, r, OB), setting Grad dT0, output parameter is comprising actual in output current I, region C
Gradient scope dT0~dT1, the final actual gradient minimum value ensured in the C of region is more than or equal to dT0。
It is understood that it will be understood by those skilled in the art that being subject to technical scheme and inventive concept
The protection domain of appended claims of the invention should all be belonged to replacement or change.
Claims (2)
1. a kind of optical pumped magnetometer gradient tolerance limit measurement apparatus, it is characterised in that：Mainly include that horizontal base (1), gradient occur
Coil (2), horizontal brace rod (3), air-bubble level (4), connecting rod level(l)ing device (5), optical pumping probe installs fixture
(6), laser range finder (7), Precision Current Component (8) and control module (9)；Control module (9) is according to probe positions, probe chi
These parameter presets calculating of very little, coil turn, coil radius produces the size of current of output needed for specific magnetic gradient, and passes through
USB interface controls Precision Current Component (8) to export specific currents and gives gradient generating coils (2)；Gradient generating coils (2) are installed in water
On flat bed (1) and by air-bubble level A (4) adjusting position, space produces magnetic gradient to gradient generating coils (2) around；
Horizontal brace rod (3) is provided with optical pumping probe installs fixture (6), and by air-bubble level A (4), air-bubble level (B) and connects
Extension bar level(l)ing device (5) adjusts horizontal brace rod (3) and gradient generating coils (2) diameter parallel；Optical pumping probe to be measured
(11) it is connected with magnetometer main frame (12) to be measured and in optical pumping probe installs fixture (6), is surveyed by laser range finder (7)
Amount gradient generating coils (2) center is popped one's head in the distance of (11) to optical pumping to be measured.
2. optical pumped magnetometer gradient tolerance limit measurement apparatus according to claim 1, it is characterised in that：Control module (9) root
Turn number N, coil radius R, probe region C (OA, r, OB), setting Grad dT are included according to |input paramete0, output ginseng
Number includes actual gradient scope dT in output current I, region C0、dT1, finally ensure that the actual magnetic gradient minimum value in the C of region is big
In equal to dT0。
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| CN201611186937.8A CN106772180B (en) | 2016-12-20 | 2016-12-20 | A kind of optical pumped magnetometer gradient tolerance measuring device |
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Cited By (4)
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| CN107356980A (en) * | 2017-08-25 | 2017-11-17 | 中国冶金地质总局山东正元地质勘查院 | A kind of portable high-accuracy ground magnetic vector longitude and latitude magnetometer |
| CN110133560A (en) * | 2019-05-31 | 2019-08-16 | 吉林大学 | A kind of magnetometer measurement range and gradient tolerance instrument for measuring index |
| CN111060861A (en) * | 2019-12-09 | 2020-04-24 | 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 |
| CN114954860A (en) * | 2022-06-24 | 2022-08-30 | 中国船舶重工集团公司第七一五研究所 | Underwater installation device and method for probe of large-plane magnetic measurement system |
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| CN107356980A (en) * | 2017-08-25 | 2017-11-17 | 中国冶金地质总局山东正元地质勘查院 | A kind of portable high-accuracy ground magnetic vector longitude and latitude magnetometer |
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| 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 |
| CN114954860A (en) * | 2022-06-24 | 2022-08-30 | 中国船舶重工集团公司第七一五研究所 | Underwater installation device and method for probe of large-plane magnetic measurement system |
| CN114954860B (en) * | 2022-06-24 | 2023-09-05 | 中国船舶重工集团公司第七一五研究所 | Underwater probe mounting device and method for large-plane magnetic measurement system |
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