CN203799001U - Dual uniform zone type magnetic field gradient magnetometer calibration device - Google Patents
Dual uniform zone type magnetic field gradient magnetometer calibration device Download PDFInfo
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- CN203799001U CN203799001U CN201420090050.9U CN201420090050U CN203799001U CN 203799001 U CN203799001 U CN 203799001U CN 201420090050 U CN201420090050 U CN 201420090050U CN 203799001 U CN203799001 U CN 203799001U
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Abstract
The utility model discloses a dual uniform zone type magnetic field gradient magnetometer calibration device, which comprises a sliding type gradient magnetic field coil device and a gradient magnetic field excitation device, wherein the sliding type gradient magnetic field coil device comprises a uniform solenoid, a non-moment solenoid, a sliding table and a base, and the gradient magnetic field excitation device is composed of a dual-output DC current source and two ampere meters. The dual uniform zone type magnetic field gradient magnetometer calibration device can generate two uniform magnetic fields which satisfy the gradient test requirements, solves the influence of probe positioning error and position microvariation in the calibration process of the traditional gradient magnetic field device on the calibration result of the calibration gradient magnetometer, can generate magnetic field output at any gradient, is simple in manufacturing, and can provide large-gradient measuring distance.
Description
Technical field
The utility model relates to magnetometer calibration field, is specifically related to a kind of pair of homogeneity range type magnetic field gradient magnetometer calibrating installation.
Background technology
At present, grad(i)ometer adopts gradient magnetic device to calibrate, it is field generator for magnetic that traditional gradient magnetic device generally be take the contrary Helmholtz's gradient magnetic field coil of winding direction, the gradient magnetic that the magnetic field that this device produces is LINEAR CONTINUOUS, in the time need to carrying out magnetic induction density calibration to the high grad(i)ometer of resolving power, gradient magnetic due to traditional gradient magnetic device generation LINEAR CONTINUOUS, when calibration, the slight variation of the positioning error of magnetic probe position and magnetic probe position in the calibration process magnetic field of living in that all can make to pop one's head in changes, thereby make to calibrate inaccurate.
In addition, for gradiometry distance when the above magnetometer of 1m is calibrated, because the size of the field region of traditional gradient magnetic device is subject to the restriction of the volume of gradient magnetic field coil, make the gradient yardstick producing have limitation, in order to meet the requirement of this type of grad(i)ometer calibrating, traditional gradient magnetic device need to increase considerably the volume of gradient magnetic field coil, difficult but large type coil is made complexity, mismachining tolerance is controlled.
Utility model content
In view of this, the utility model provides a kind of pair of homogeneity range type magnetic field gradient magnetometer calibrating installation, this device has solved the micro-change of probe location error and the position impact on calibration grad(i)ometer calibration result in calibration process of traditional gradient magnetic device, can produce the magnetic field output of Arbitrary Gradient, and manufacture simply, the measuring distance of large gradient can be provided.
A pair homogeneity range type magnetic field gradient magnetometer calibrating installation, comprises slidingtype gradient magnetic field coil device and gradient magnetic exciting bank two parts, and described slidingtype gradient magnetic field coil device comprises even strong solenoid, without square solenoid, slide unit and pedestal; Even strong solenoid is fixed on pedestal, base interior has a passage, slide unit is divided into two-layer up and down, without square solenoid, be fixed on slide unit upper strata, slide unit lower floor coordinates with passage, without square solenoid and even strong solenoidal dead in line, and by slide unit in even strong solenoid inside along axis direction adjusting position, described gradient magnetic exciting bank is comprised of a dual output DC current source and two reometers, the I of dual output DC current source
1output is connected with reometer A, even strong solenoidal coil successively, I
2output is successively with reometer B, connect without the solenoidal coil of square, a probe of grad(i)ometer to be measured is placed in the inside of described even strong solenoid (1) and without square solenoid (2) region in addition, another one probe is placed in the interior zone without square solenoid (2).
The lower floor of slide unit and the cooperation of base station adopt screw pushing mechanism, adjustable range is 0～1.2m, described even strong solenoidal length is 4m, diameter 0.4m, winding 400 circles, described is comprised of inside and outside two coaxial solenoid coils without square solenoid, interior solenoidal length is that 0.6m, diameter are 0.098m, winding 60 circles, outer solenoidal length is 0.596m, diameter 0.12m, winding 40 circles.
Beneficial effect:
1) first, the utility model adopts gradient magnetic exciting bank by changing even strong solenoid and changing two homogeneity range type gradient magnetics sizes without the current value of the solenoidal coil of square, can produce two magnetic fields that meet gradient test request, compare with the magnetic field that traditional employing gradient magnetic field coil produces, only need to regulate electric current just can realize Arbitrary Gradient amount, can be used in gradient calibrate in the output of Arbitrary Gradient of demand.
Secondly, the utility model adopts even strong solenoid and without square solenoid, produces respectively two Bu Tong field signals of size, adopt slide unit to regulate the distance between two magnetic fields, can produce two uniform magnetic fields that vary in size, make the Magnetic Sensor of grad(i)ometer can be separately under certain magnetic field environment uniformly, solved in calibration process the micro-change of probe location error and position to the normal work problem of the impact of calibration grad(i)ometer and grad(i)ometer.
Again, the utility model is by regulating slide unit to change even strong solenoid and without the solenoidal distance of square, produce the magnetic field output of any yardstick, solved the restriction of traditional gradient magnetic device gradiometry distance, and compare with traditional gradient magnetic device, do not have the difficulty in coil making and processing.
2) lower floor of slide unit of the present utility model and the cooperation of base station adopt screw pushing mechanism, adjustable range is 0～1.2m, even strong solenoidal length is 4m, diameter 0.4m, winding 400 circles, without square solenoid, by inside and outside two coaxial solenoid coils, formed, interior solenoidal length is 0.6m, diameter is 0.098m, winding 60 circles, outer solenoidal length is 0.596m, diameter 0.12m, winding 40 circles, the calibration of the field signal of the standard of generation calibration grad(i)ometer to two probe grad(i)ometers, can meet the calibration requirements of current normal gradients magnetometer, and probe test value is stable, can realize high-precision magnetometer calibration.
Accompanying drawing explanation
Fig. 1 is two homogeneity range type gradient magnetic device schematic diagram;
Fig. 2 is without square solenoid schematic diagram;
Fig. 3 be slide unit with without square solenoid schematic diagram;
Fig. 4 is slide unit pushing mechanism schematic diagram;
Fig. 5 is two homogeneity range type gradient magnetic schematic diagram of device;
Fig. 6 is for producing magnetic induction density and two solenoidal position relationship schematic diagram of gradient magnetic;
The position view of magnetic probe during the calibration of Fig. 7 grad(i)ometer.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
The utility model provides a kind of pair of homogeneity range type magnetic field gradient magnetometer calibrating installation, comprise slidingtype gradient magnetic field coil device and gradient magnetic exciting bank two parts, described slidingtype gradient magnetic field coil device comprises even strong solenoid 1, without square solenoid 2, slide unit 3 and pedestal 4; As shown in Figure 1.Even strong solenoid 1 is fixed on pedestal 4, there is a tooth bar passage pedestal 4 inside, slide unit 3 is divided into two-layer up and down, without square solenoid 2, be fixed on slide unit upper strata, slide unit lower floor coordinates with tooth bar passage, dead in line without square solenoid 2 with even strong solenoid 1, without square solenoid 2, by inside and outside two coaxial solenoid coils, formed, as shown in Figure 2, and by slide unit 3 in even strong solenoid 1 inside along axis direction adjusting position, gradient magnetic exciting bank is comprised of a dual output DC current source and two reometers, the I1 output of dual output DC current source successively with reometer A, even strong solenoidal coil series connection, I2 output successively with reometer B, without the solenoidal coil series connection of square, as shown in Figure 5.
The mathematical model of the gradient magnetic that the utility model produces is: B
grad=| B
m-B
c|, therefore due to the inside at even strong solenoid 1 without square solenoid 2, without the magnetic field of square solenoid 2 inside, be the stack in even strong solenoid 1 and the magnetic field that self produces without square solenoid 2, the internal magnetic field B without square solenoid 2 after stack
mmagnetic field B with even strong solenoid 1 generation
cvalue is different, has just formed a similar step-like gradient magnetic, as shown in Figure 6 between two regions of the inner diverse location of device.Even strong solenoid 1 and produce respectively uniform magnetic field without square solenoid 2, has guaranteed the formation in two magnetic fields, place " step ".By coil parameter, control without the outside magnetic moment apart from solenoid 2, make it very faint, add external magnetic induction with distance by cube relation, decay, therefore faint without the external magnetic field of square solenoid 2 in very short distance, can not affect the magnetic field of even strong solenoid 1, make the utility model can in short distance very, produce the gradient magnetic of two homogeneity range types, because even strong solenoidal external magnetic field is more intense, therefore, without square solenoid 2, need regulate in even strong solenoidal inside, in addition, can adopt two without square solenoid 2, to produce two uniform magnetic fields, but owing to there being two coaxial solenoid coils to form without square solenoid 2, processing trouble, therefore the present embodiment adopts even strong solenoid 2 and without two uniform magnetic fields of combination results of square solenoid 2.
In concrete design process, by being set, the adjustable range of slide unit 3 meets the requirement of gradient calibration.And by controlling the interference that reduces by two uniform magnetic fields without the magnetic moment of square solenoid 2, by even strong solenoid 1 being set and producing without inside and outside solenoidal length, diameter and the number of turn of square solenoid 2 demand that meets magnetic field calibration.
Even strong solenoid and can be in the same way without the electric current in square solenoid in the utility model, also can be reverse, the gradient direction of its aspect effect gradient magnetic that device produces, in the time of in the same way, the highfield district that is gradient magnetic without the magnetic field of square solenoid 2 inside, the downfield district that the magnetic field of even strong solenoid 1 inside is gradient magnetic; In the time of oppositely, the downfield district that is gradient magnetic without the magnetic field of square solenoid 2 inside, the highfield district that the magnetic field of even strong solenoid 1 inside is gradient magnetic.
The lower floor of the slide unit 3 in the present embodiment and the cooperation of base station 4 adopt screw pushing mechanism, and as shown in Figure 4, adjustable range is 0～1.2m to structural representation.The length of even strong solenoid 1 is 4m, diameter 0.4m, and winding 400 circles, the field coil constant in the homogeneity range in generation magnetic field is 250 μ T/A, and when non-uniformity is 0.1%, homogeneity range diameter is 0.1m, and length is 1m.Without square solenoid 2, inside and outside two coaxial solenoid coils, consist of, interior solenoidal length is that 0.6m, diameter are 0.098m, winding 60 circles, and outer solenoidal length is 0.596m, diameter 0.12m, winding 40 circles.Outside magnetic moment is less than 0.2(mA) m
2, the field coil constant in the homogeneity range in generation magnetic field is 35 μ T/A, when non-uniformity is 0.1%, homogeneity range diameter is 0.1m, and length 0.1m can meet the calibration requirements of current normal gradients magnetometer, and probe test value is stable, can realize high-precision magnetometer calibration.
By gradient magnetic exciting bank, change even strong solenoid 1 and without the current value of the coil of square solenoid 2, thereby change the gradient amount of two homogeneity range type gradient magnetics, by regulating even strong solenoid 1 and changing the gradient distance of gradient fields without the distance of square solenoid 2, therefore, the utility model adopts gradient magnetic exciting bank by changing even strong solenoid and changing the gradient amount of two homogeneity range type gradient magnetics without the current value of the solenoidal coil of square, compare with the magnetic field that traditional employing gradient magnetic field coil produces, only need to regulate electric current just can realize Arbitrary Gradient amount, can be used in the output of the Arbitrary Gradient of demand in gradient calibration.
Adopt slide unit to regulate the distance between two magnetic fields, can produce two uniform magnetic fields that vary in size, make the Magnetic Sensor of grad(i)ometer can be separately under certain magnetic field environment uniformly, solved in calibration process the micro-change of probe location error and position to the normal work problem of the impact of calibration grad(i)ometer and grad(i)ometer.
Therefore, the utility model can produce the magnetic field output of Arbitrary Gradient, and can produce uniform magnetic field in part, has solved the impact of probe location error on calibration grad(i)ometer in calibration process.
The calibration steps of the grad(i)ometer based on said apparatus, specifically comprises the following steps:
Step 1, regulate slide unit 3, make a probe of grad(i)ometer to be measured be placed in the inside of described even strong solenoid 1 and without the region beyond square solenoid 2, another one probe is positioned at the interior zone without square solenoid 2.
When grad(i)ometer is calibrated, concrete position relationship as shown in Figure 7, two Magnetic Sensors (magnetic probe) are placed in respectively in two uniform magnetic field regions and calibrate, the center homogeneity of field region is best, the stability in the magnetic field of the region that can better guarantee to pop one's head in.
Step 2, according to the gradient amount of magnetometer to be measured, determine even strong solenoid 1 and without the alive size of square solenoid 2 coil, magnetometer calibrated.
In sum, these are only preferred embodiment of the present utility model, be not intended to limit protection domain of the present utility model.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (2)
1. a two homogeneity range type magnetic field gradient magnetometer calibrating installation, it is characterized in that, comprise slidingtype gradient magnetic field coil device and gradient magnetic exciting bank two parts, described slidingtype gradient magnetic field coil device comprises even strong solenoid (1), without square solenoid (2), slide unit (3) and pedestal (4); Even strong solenoid (1) is fixed on pedestal (4), there is a passage pedestal (4) inside, slide unit (3) is divided into two-layer up and down, without square solenoid (2), be fixed on slide unit (3) upper strata, slide unit (3) lower floor coordinates with passage, dead in line without square solenoid (2) with even strong solenoid (1), and inner along axis direction adjusting position at even strong solenoid (1) by slide unit (3), described gradient magnetic exciting bank is comprised of a dual output DC current source and two reometers, the I of dual output DC current source
1output is connected with the coil of reometer A, even strong solenoid (1) successively, I
2output is successively with reometer B, connect without the coil of square solenoid (2), a probe of grad(i)ometer to be measured is placed in the inside of described even strong solenoid (1) and without square solenoid (2) region in addition, another one probe is placed in the interior zone without square solenoid (2).
2. a kind of pair of homogeneity range type magnetic field gradient magnetometer calibrating installation as claimed in claim 1, it is characterized in that, the cooperation of the lower floor of described slide unit (3) and base station (4) adopts screw pushing mechanism, adjustable range is 0～1.2m, the length of described even strong solenoid (1) is 4m, diameter 0.4m, winding 400 circles, described is comprised of inside and outside two coaxial solenoid coils without square solenoid (2), interior solenoidal length is that 0.6m, diameter are 0.098m, winding 60 circles, outer solenoidal length is 0.596m, diameter 0.12m, winding 40 circles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420090050.9U CN203799001U (en) | 2014-02-28 | 2014-02-28 | Dual uniform zone type magnetic field gradient magnetometer calibration device |
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|---|---|---|---|
| CN201420090050.9U CN203799001U (en) | 2014-02-28 | 2014-02-28 | Dual uniform zone type magnetic field gradient magnetometer calibration device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107490775A (en) * | 2017-09-30 | 2017-12-19 | 北京航空航天大学 | A kind of three axial coil constants and non-orthogonal angles integral measurement method |
| CN110426654A (en) * | 2019-03-26 | 2019-11-08 | 北京航空航天大学 | A method of separation magnetic field strength and magnetic field gradient influence high temperature optically pumped magnetometer line width |
| CN110988771A (en) * | 2019-12-19 | 2020-04-10 | 北京无线电计量测试研究所 | Calibration device |
| 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 |
-
2014
- 2014-02-28 CN CN201420090050.9U patent/CN203799001U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107490775A (en) * | 2017-09-30 | 2017-12-19 | 北京航空航天大学 | A kind of three axial coil constants and non-orthogonal angles integral measurement method |
| CN107490775B (en) * | 2017-09-30 | 2020-01-21 | 北京航空航天大学 | Triaxial coil constant and non-orthogonal angle integrated measurement method |
| CN110426654A (en) * | 2019-03-26 | 2019-11-08 | 北京航空航天大学 | A method of separation magnetic field strength and magnetic field gradient influence high temperature optically pumped magnetometer line width |
| 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 |
| CN110988771A (en) * | 2019-12-19 | 2020-04-10 | 北京无线电计量测试研究所 | Calibration device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20180228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |