CN117347929A - Magnetic testing device with controllable angle of magnetic field and measuring method - Google Patents
Magnetic testing device with controllable angle of magnetic field and measuring method Download PDFInfo
- Publication number
- CN117347929A CN117347929A CN202311253332.6A CN202311253332A CN117347929A CN 117347929 A CN117347929 A CN 117347929A CN 202311253332 A CN202311253332 A CN 202311253332A CN 117347929 A CN117347929 A CN 117347929A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- magnetic field
- magnetometer
- turntable
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims description 34
- 239000000523 sample Substances 0.000 claims description 96
- 239000000463 material Substances 0.000 claims description 30
- 238000012544 monitoring process Methods 0.000 claims description 29
- 230000005389 magnetism Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 25
- 238000010998 test method Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1215—Measuring magnetisation; Particular magnetometers therefor
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention relates to the technical field of magnetic field measurement, in particular to a magnetic field controllable angle controllable magnetic test device and a magnetic field controllable angle controllable magnetic test method. The magnetic test apparatus includes: the magnetic shielding assembly is used for shielding the earth magnetic field and the external disturbance magnetic field, and the non-magnetic turntable assembly is used for driving the tested piece (7) to rotate; the non-magnetic turntable driver (5) and the non-magnetic turntable controller (6) of the non-magnetic turntable assembly are arranged outside the magnetic shielding assembly so as to avoid influencing the magnetic field in the magnetic shielding assembly; the nonmagnetic turntable driver (5) drives the nonmagnetic turntable object table (3) to rotate through the nonmagnetic turntable driving rod (4) under manual control or under the electric control of the nonmagnetic turntable controller (6), and a tested piece (7) arranged on the nonmagnetic turntable object table (3) rotates along with the nonmagnetic turntable object table (3). The invention has strong universality, is suitable for measuring any magnetic field related to the rotation angle, is not disturbed by an external magnetic field, and has high measurement accuracy.
Description
Technical Field
The invention relates to the technical field of magnetic field measurement, in particular to a magnetic field controllable angle controllable magnetic test device and a magnetic field controllable angle controllable magnetic test method.
Background
Magnetism is a fundamental property of matter, and magnetic field is a fundamental physical field that exists in space and is a fundamental physical property that needs to be detected in many scientific studies. In the field of weak magnetic measurement, the influence of material magnetism on equipment is more obvious, and the aspect of testing technology aiming at the material magnetism is worth focusing on. Magnetometers or magnetometers are important weak magnetic field measurement instruments, collectively referred to herein as magnetometers, and in order to obtain more accurate magnetic field data, attention is paid to vector magnetometer zero accuracy testing, scalar magnetometer steering difference testing, and the like for magnetometer instruments.
The invention application with the application number of 20201048692. X discloses a magnetic moment measuring device and a magnetic moment measuring method. The device needs to generate a background magnetic field of 200 nT-20000 nT in a magnetic shielding barrel, and the device uses a pumping-detection type atomic magnetometer to measure. The distance between the sample to be measured and the rubidium bubble is increased slowly and linearly by adopting manual operation or an electric control displacement table in the direction parallel to the background magnetic field, so that the magnetic moment of the sample to be measured is measured.
However, the magnetic moment measuring device and method provided by the application number 20201048692. X can only measure the magnetic moment of a measured sample under the background magnetic field environment that the magnetic shielding cylinder has 200 nT-20000 nT, and can not work in the magnetic shielding cylinder in the near-zero magnetic environment. In addition, the application of the invention is to measure the magnetic moment of the magnetic sample in situ, so that the magnetic moment measuring device does not have the capability of rotating the magnetic sample, cannot be used for testing zero accuracy of a vector magnetometer, steering difference of a scalar magnetometer and the like, and has low universality. However, no standard calibration measuring instrument exists for performance tests such as zero accuracy and the like of the weak magnetic magnetometer in China.
Disclosure of Invention
The invention aims to solve the problems that the existing magnetic measuring device is not strong in universality, can not work in a magnetic shielding barrel in a near-zero magnetic environment, cannot measure zero accuracy of a vector magnetometer and cannot measure steering difference of the scalar magnetometer, and further provides a magnetic measuring device with controllable magnetic field and controllable angle. The device provided by the invention can generate a magnetic field covering the intensity of the earth magnetic field, can also work in a near-zero magnetic environment in the shielding cylinder, and can rotate a measured sample by utilizing the angle-controllable non-magnetic turntable device to perform any magnetic field measurement related to the rotation angle, for example, the magnetic measurement of materials, the zero accuracy measurement of a vector magnetometer, the steering difference measurement of a scalar magnetometer and the measurement of the measuring range and linearity of the magnetometer are realized.
In order to solve the technical problems, the magnetic field controllable angle controllable magnetic testing device provided by the technical proposal of the invention,
comprising the following steps: a magnetic shield assembly and a nonmagnetic turntable assembly; wherein,
the magnetic shield assembly includes: a magnetic shielding cylinder 1 provided with a magnetic shielding cylinder cover 2 for shielding the earth magnetic field and the external disturbance magnetic field;
the nonmagnetic turntable assembly comprises: a nonmagnetic turntable stage 3, a nonmagnetic turntable driving rod 4, a nonmagnetic turntable driver 5 and a nonmagnetic turntable controller 6; wherein,
one end of the nonmagnetic turntable driving rod 4 passes through a through hole on one side of the magnetic shielding barrel 1 to enter the magnetic shielding barrel 1, is connected with the nonmagnetic turntable objective table 3, and the other end of the nonmagnetic turntable driving rod is connected with the nonmagnetic turntable driver 5 arranged outside the magnetic shielding barrel 1;
the non-magnetic turntable driver 5 and the non-magnetic turntable controller 6 are both arranged outside the magnetic shielding barrel 1 so as to avoid influencing the magnetic field in the magnetic shielding barrel 1; the nonmagnetic turntable driver 5 drives the nonmagnetic turntable object table 3 to rotate through the nonmagnetic turntable driving rod 4 under manual control or under the electric control of the nonmagnetic turntable controller 6, and the tested piece 7 arranged on the nonmagnetic turntable object table 3 rotates along with the nonmagnetic turntable object table 3.
As a modification of the above device, the magnetic shield cylinder 1 is provided with a through hole at a position corresponding to the center of the nonmagnetic turntable stage 3 for passing the object 7 to be measured therethrough and is fixed to the nonmagnetic turntable stage 3.
As an improvement of the device, the nonmagnetic turntable driver 5 drives the nonmagnetic turntable object stage 3 to rotate in 360 degrees in all directions under the manual control or the electric control of the nonmagnetic turntable controller 6 through the nonmagnetic turntable driving rod 4.
As an improvement of the above apparatus, the magnetic test apparatus further comprises: a monitoring magnetometer probe 12 placed inside the magnetic shield cylinder 1; the monitoring magnetometer probe 12 is arranged perpendicular to the axial direction of the nonmagnetic turntable driving rod 4 and is used for monitoring the magnetic field of the tested piece 7; the connecting wire of the monitoring magnetometer probe 12 passes through the through hole of the magnetic shielding barrel 1 and is connected with the monitoring magnetometer probe controller 13 arranged outside the magnetic shielding barrel 1.
As an improvement of the above apparatus, the magnetic test apparatus further comprises: a magnetic field generating element disposed inside the magnetic shield cylinder 1 for providing a controllable artificial magnetic field; wherein,
the magnetic field generating element includes: a set of artificial magnetic field coils or a plurality of sets of artificial magnetic field coils of different axial directions disposed inside the magnetic shield cylinder 1, wherein each set of artificial magnetic field coils comprises: the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 are symmetrically arranged at two sides of the non-magnetic turntable objective table 3 and are used for providing the controllable artificial magnetic field;
the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 are driven by an external cylinder current source 10 arranged outside the magnetic shielding cylinder 1; the external current source 10 is connected to the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 by means of wires passing through the through-holes of the magnetic shield tube 1.
To provide another object of the present invention, the present invention also provides a method for measuring magnetic moment of a material, which is realized based on the magnetic field controllable angle controllable magnetic testing device, the method comprises the following steps:
fixing the tested material in the center of the non-magnetic rotary table object stage 3;
closing the magnetic shielding cylinder cover 2 to enable the magnetic shielding cylinder cover 2 and the magnetic shielding cylinder 1 to shield the earth magnetic field and the external disturbance magnetic field;
rotating the non-magnetic rotary table stage 3 to enable the measured material to rotate one 360 degrees or continuously rotate a plurality of 360 degrees along with the non-magnetic rotary table stage 3, and simultaneously utilizing the monitoring magnetometer probe 12 to measure continuously-changed magnetic field data in the rotating process of the non-magnetic rotary table stage 3;
taking as the continuous magnetic field strength B the continuously variable magnetic field data measured by the monitoring magnetometer probe 12 over one 360 DEG or the average of the continuously variable magnetic field data over a plurality of 360 DEG M The method comprises the steps of carrying out a first treatment on the surface of the According to the continuous magnetic field intensity B M The magnetic moment of the measured material is calculated as a function of the amount of change in the angle of rotation and the distance L from the monitoring magnetometer probe 12 to the center of the measured material for use in assessing the measured material remanence.
In order to provide another object of the present invention, the present invention also provides a method for measuring zero accuracy of a vector magnetometer, which is implemented based on the magnetic field controllable angle controllable magnetic testing device, the vector magnetometer comprises: a measured magnetometer probe 14 and a measured magnetometer controller 11; the method comprises the following steps:
penetrating a probe 14 of a magnetic force instrument to be measured into the magnetic shielding cylinder through a through hole above the magnetic shielding cylinder 1, and fixing the probe in the center of the non-magnetic turntable objective table 3;
closing the magnetic shielding cylinder cover 2 to enable the magnetic shielding cylinder cover 2 and the magnetic shielding cylinder 1 to shield the earth magnetic field and the external disturbance magnetic field;
opening the magnetometer controller 11 and the magnetometer probe 14 to make the magnetometer probe 14 start working based on the control of the magnetometer controller 11; the initial position of the non-magnetic turntable stage 3 is set to be a 0 DEG position, and magnetic field data B in any direction measured by the measured magnetometer probe 14 at the 0 DEG position is recorded 1 The square is processedThe direction is denoted as Y-axis direction;
rotating the non-magnetic turntable stage 3, rotating the detected magnetometer probe 14 along with the non-magnetic turntable stage 3 by 180 degrees in the Y-axis direction, recording the position of the non-magnetic turntable stage 3 after stopping rotating as a 180-degree position, and recording the magnetic field data B in the Y-axis direction detected by the detected magnetometer probe 14 at the 180-degree position 2 ；
The external cylinder current source 10 is provided with a plurality of different current values, under the driving of the external cylinder current source 10, a group of first artificial magnetic field coils 8 and second artificial magnetic field coils 9 of the artificial magnetic field coils in the Y-axis direction generate a plurality of stable magnetic fields B corresponding to the current values in the Y-axis direction, so that the tested magnetometer probe 14 respectively works under each stable magnetic field B environment, the nonmagnetic turntable stage 3 is rotated and the magnetic field data B of the Y-axis direction at the 0 DEG position under each stable magnetic field B environment is recorded 1 And 180 DEG position Y-axis direction magnetic field data B 2 ；
Using a plurality of magnetic field data B measured by the magnetometer probe 14 under test 1 And a plurality of magnetic field data B 2 Obtaining the corresponding Y-axis zero accuracy delta B of the vector magnetometer in each magnetic field environment, wherein delta B= (B) 1 +B 2 )/2。
In order to provide another object of the present invention, the present invention also provides a method for measuring a steering difference of a scalar magnetometer, which is realized based on the magnetic field controllable angle controllable magnetic testing device, wherein the scalar magnetometer comprises: a measured magnetometer probe 14 and a measured magnetometer controller 11; the method comprises the following steps:
fixing a detected magnetometer probe 14 at the center of the nonmagnetic turntable objective table 3;
closing the magnetic shielding cylinder cover 2 to enable the magnetic shielding cylinder cover 2 and the magnetic shielding cylinder 1 to shield the earth magnetic field and the external disturbance magnetic field;
opening the external current source 10 of the cylinder to enable the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 of any group of artificial magnetic field coils to generate a stable magnetic field B of 100nT under the drive of the external current source 10 of the cylinder; opening the magnetometer controller 11 and the magnetometer probe 14 to make the magnetometer probe 14 work based on the control of the magnetometer controller 11; setting the initial position of the non-magnetic turntable stage 3 as a 0 DEG position, recording magnetic field data B0 of the measured magnetometer probe 14 in any direction when the 0 DEG position is set, and recording the direction as a Y-axis direction;
rotating the non-magnetic rotary table stage 3n different angles within 360 degrees to obtain magnetic field strengths Bn corresponding to the n angles respectively; based on n magnetic field strengths Bn, steering difference data of 360 degrees of the scalar magnetometer are obtained.
In order to provide another object of the present invention, the present invention also provides a method for measuring the range and linearity of a magnetometer, which is implemented based on the magnetic field controllable angle controllable magnetic testing device, the magnetometer comprises: a measured magnetometer probe 14 and a measured magnetometer controller 11, the method comprising the steps of:
fixing a detected magnetometer probe 14 at the center of the nonmagnetic turntable objective table 3;
opening the external current source 10 of the cylinder to enable the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 of any group of artificial magnetic field coils to generate a stable magnetic field B' under the driving of the external current source 10 of the cylinder;
the external current source 10 is arranged to generate different current values I 1 ，I 2 ，I 3 ，···I n Calculating the magnetic field value B 'generated by the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 under the driving of corresponding current through the coil coefficients of the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9' 1 ，B′ 2 ，B′ 3 ，···B′ n ；
Opening the measured magnetometer controller 11 and the measured magnetometer probe 14 to enable the measured magnetometer probe 14 to work based on the control of the measured magnetometer controller 11 and respectively record the magnetic field value B '' 1 ，B′ 2 ，B′ 3 ，···B′ n In the environment, the corresponding magnetic field data B in any direction measured by the measured magnetometer probe 14 1 ，B 2 ，B 3 ，···B n And the direction is noted as the Y-axis direction;
according to the first artificial magnetic field coil 8 and the second artificial magnetic field lineThe magnetic field value B 'generated by the ring 9' 1 ，B′ 2 ，B′ 3 ，···B′ n And corresponding magnetic field data B measured by the magnetometer probe 14 under test 1 ，B 2 ，B 3 ，···B n And drawing the measuring range and the linearity of the magnetometer in the Y-axis direction.
The magnetic field controllable angle controllable magnetic testing device provided by the invention has the advantages that the magnetic shielding component shields an external magnetic field, so that the test is not disturbed by the external magnetic field, the non-magnetic turntable component drives the test piece to rotate, the universality is strong, and the magnetic field controllable angle controllable magnetic testing device is suitable for any magnetic field measurement application related to the rotation angle, such as the magnetic measurement of a solid material, the zero point accuracy measurement of a vector magnetometer, the steering difference measurement of a scalar magnetometer and the measurement of the measuring range and linearity of the magnetometer; when the magnetic field controllable angle controllable magnetic testing device is used for testing the performance of magnetometers, the tested magnetometers probe 14 can pass through the through hole of the shielding cylinder 1 and be placed in the center of the non-magnetic turntable object stage. According to the axial requirement of measurement and the position of the rotary non-magnetic turntable stage, artificial magnetic field coils in different directions can be placed in the shielding cylinder 1, the artificial magnetic field coils can provide magnetic fields required by the test under the drive of a cylinder external current source 10, and the zero accuracy test of the vector magnetometer and the steering difference test of the scalar magnetometer can be performed in the direction of the rotary stage.
Drawings
FIG. 1 is a first side view of a magnetic field controllable angle controllable magnetic test device configuration;
FIG. 2 is a side view of an apparatus for measuring the magnetic properties of a material;
FIG. 3 is a top view of an apparatus for measuring the magnetic properties of a material;
FIG. 4 (a) is a side view of an apparatus for measuring magnetometer accuracy;
FIG. 4 (b) is a top view of an apparatus for measuring magnetometer accuracy;
fig. 5 is a set of vector magnetometer zero accuracy measurement data.
Drawing reference numerals
1. Magnetic shielding cylinder 2, magnetic shielding cylinder cover 3 and non-magnetic turntable objective table
4. Nonmagnetic turntable driving rod 5, nonmagnetic turntable driver 6 and nonmagnetic turntable controller
7. The measured piece 8, the first artificial magnetic field coil 9 and the second artificial magnetic field coil
10. External cylinder current source 11, magnetic force instrument controller 12 to be measured, and probe for monitoring magnetic force instrument
13 monitor magnetometer controller 14, measured magnetometer probe
Detailed Description
The technical scheme provided by the invention is further described below by combining with the embodiment.
The magnetic testing device mainly comprises a magnetic shielding barrel and a non-magnetic turntable.
The magnetic shielding cylinder is used for shielding the earth magnetic field and the external disturbance magnetic field, so that the inside of the cylinder is in a near zero magnetic environment. The magnetic shielding barrel is provided with a magnetic shielding barrel cover, and after the magnetic shielding barrel cover is closed, the non-magnetic rotary table objective table can freely rotate in 360 degrees in all directions under the action of the controller.
The driver and the controller of the non-magnetic turntable are both arranged outside the magnetic shielding cylinder to control the rotation of the driving rod, so that the influence on the magnetic field in the cylinder is avoided. The driving rod of the non-magnetic rotary table passes through the through hole below the magnetic shielding barrel and enters the magnetic shielding barrel, and the top end of the driving rod is fixed with an objective table for placing and fixing a measured piece. The length of the driving rod can be adjusted to enable the measured piece to be located in the center of the magnetic shielding barrel, and the measured piece is guaranteed to be placed in a magnetic field uniform area in the barrel.
When the device is used for measuring the magnetism of a material, a monitoring magnetometer probe 12 can be fixed in a direction perpendicular to the rotation axis for measuring and acquiring magnetic field data, and the magnetic moment of the material in the direction can be obtained by continuously rotating the material for 360 degrees.
The invention further provides a magnetic field controllable angle controllable magnetic testing device and a magnetic field controllable angle measuring method by combining the drawings of the specific embodiment of the invention.
Example 1
A magnetic testing device with controllable angle of magnetic field,
as shown in fig. 1, the magnetic test apparatus includes: a magnetic shield assembly and a nonmagnetic turntable assembly; wherein,
the magnetic shield assembly includes: a magnetic shielding cylinder 1 provided with a magnetic shielding cylinder cover 2 for shielding the earth magnetic field and the external disturbance magnetic field;
the nonmagnetic turntable assembly comprises: a nonmagnetic turntable stage 3, a nonmagnetic turntable driving rod 4, a nonmagnetic turntable driver 5 and a nonmagnetic turntable controller 6; wherein,
one end of the nonmagnetic turntable driving rod 4 penetrates through a through hole on one side of the magnetic shielding barrel 1 to enter the magnetic shielding barrel 1, is connected with the nonmagnetic turntable objective table 3, and the other end of the nonmagnetic turntable driving rod is connected with the nonmagnetic turntable driver 5 arranged outside the magnetic shielding barrel 1.
The magnetic shielding barrel 1 and the non-magnetic turntable system are placed on the ground, the magnetic shielding barrel 1 is provided with a magnetic shielding barrel cover 2, and the magnetic shielding barrel cover can be used for shielding the earth magnetic field after being closed. The nonmagnetic turntable driver 5 and the nonmagnetic turntable controller 6 are both arranged outside the magnetic shielding cylinder to avoid influencing the magnetic field in the cylinder. The nonmagnetic turntable driving rod 4 penetrates through a through hole below the magnetic shielding barrel, and the nonmagnetic turntable objective table 3 is fixed above the nonmagnetic turntable driving rod. The nonmagnetic turntable driver 5 drives the nonmagnetic turntable object stage 3 to rotate through the nonmagnetic turntable driving rod 4 under manual control or under the electric control of the nonmagnetic turntable controller 6; the magnetic shielding barrel 1 is provided with a through hole at a position corresponding to the center of the nonmagnetic turntable stage 3, and is used for enabling the measured piece 7 to pass through the through hole and be fixed on the nonmagnetic turntable stage 3. The object 7 to be tested can be fixedly placed in the center of the stage 3 and rotated with the stage when the device is used for testing.
Preferably, the nonmagnetic turntable driver 5 drives the nonmagnetic turntable stage 3 to rotate in 360 degrees in all directions through the nonmagnetic turntable driving rod 4 under manual control or under electric control of the nonmagnetic turntable controller 6.
Preferably, as shown in fig. 2 and 3, the magnetic test apparatus further includes: a monitoring magnetometer probe 12 placed inside the magnetic shield cylinder 1; the monitoring magnetometer probe 12 is arranged perpendicular to the axial direction of the nonmagnetic turntable driving rod 4 and is used for monitoring the magnetic field of the tested piece 7; the connecting wire of the monitoring magnetometer probe 12 passes through the through hole of the magnetic shielding barrel 1 and is connected with the monitoring magnetometer probe controller 13 arranged outside the magnetic shielding barrel 1. When magnetic measurement of the material is performed, the monitor magnetometer probe 12 is penetrated from a through hole on one side and fixed in a direction perpendicular to the rotation axis of the nonmagnetic turntable.
Preferably, the magnetic test apparatus further comprises: a magnetic field generating element disposed inside the magnetic shield cylinder 1 for providing a controllable artificial magnetic field; wherein the magnetic field generating element comprises: a set of artificial magnetic field coils or a plurality of sets of artificial magnetic field coils of different axial directions disposed inside the magnetic shield cylinder 1, wherein each set of artificial magnetic field coils comprises: the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 are symmetrically arranged at two sides of the non-magnetic turntable objective table 3 and are used for providing the controllable artificial magnetic field; the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 are driven by an external cylinder current source 10 arranged outside the magnetic shielding cylinder 1; the external current source 10 is connected to the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 by means of wires passing through the through-holes of the magnetic shield tube 1.
When the measurement of zero accuracy, steering difference and the like of the magnetometer is carried out, the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 with different axial directions can be placed, and the required magnetic field with stable size can be generated under the drive of an external current source of the cylinder.
Example 2:
this embodiment provides a method of measuring the magnetic moment of a material by means of a magnetic field controllable angle controllable magnetic test device as shown in fig. 3.
The measured material 7 is fixed in the center of the non-magnetic rotary table stage 3, and the magnetic shielding cylinder cover 2 is closed, so that the magnetic shielding cylinder cover 2 and the magnetic shielding cylinder 1 shield the earth magnetic field and the external disturbance magnetic field;
as shown in fig. 3, the driving rod is placed in the Z-axis direction, a monitoring magnetometer probe 12 is fixed on the XOY plane for magnetic field monitoring, the non-magnetic turntable stage 3 is rotated, the measured material is rotated by one 360 ° or continuously by a plurality of 360 ° along with the non-magnetic turntable stage 3, and continuously variable magnetic field data is measured by the monitoring magnetometer probe 12 during the rotation of the non-magnetic turntable stage 3;
using continuous magnetic field data (which may be rotated continuously for a plurality of turns, calculating an average value) measured by the monitoring magnetometer probe 12, based on the magnetic field strength B M The relation between the angle variation and the distance L can be used for calculating the magnetic moment of the measured material and evaluating the residual magnetism of the measured material.
Specifically, the continuous magnetic field intensity B is the average value of the continuous magnetic field data of one 360 DEG or the continuous magnetic field data of a plurality of 360 DEG measured by the monitoring magnetometer probe 12 M The method comprises the steps of carrying out a first treatment on the surface of the According to the continuous magnetic field intensity B M The magnetic moment of the measured material is calculated as a function of the amount of change in the angle of rotation and the distance L from the monitoring magnetometer probe 12 to the center of the measured material for use in assessing the measured material remanence.
Example 3:
this embodiment provides a method of measuring the zero accuracy of a vector magnetometer by means of a magnetic field controllable angle controllable magnetic test device as shown in fig. 4 (a) and 4 (b). The vector magnetometer comprises: a measured magnetometer probe 14 and a measured magnetometer controller 11; the method comprises the following steps:
penetrating a detected magnetometer probe 14 into the magnetic shielding barrel 1 through a through hole above the magnetic shielding barrel 1, fixing the probe in the center of the non-magnetic turntable objective table 3, and closing the magnetic shielding barrel cover 2 to ensure that the magnetic shielding barrel cover 2 and the magnetic shielding barrel 1 shield an earth magnetic field and an external disturbance magnetic field;
in the initial position, the measured magnetometer controller 11 controls the measured magnetometer probe 14 to start operating. The magnetic shield cylinder 1 has a certain residual magnetism, and the initial position of the non-magnetic turntable stage 3 is recorded as a 0 DEG position. Recording magnetic field data B in Y-axis direction measured by the magnetometer probe 14 at 0 DEG position 1 . In the method, the magnetic field is not externally applied by the artificial magnetic field coil.
The nonmagnetic turntable stage 3 was rotated, and the nonmagnetic turntable stage 3 was controlled to rotate 180 ° in the XOY plane, i.e., in the Y axis direction, and the position after stopping the rotation was recorded as a 180 ° position. Recording the Y-axis magnetic field measured by the magnetometer probe 14 at a 180 positionData B 2 。
The first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 are arranged in the Y-axis direction in the magnetic shielding barrel 1, and the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 generate a Y-direction stable magnetic field B under the driving of an external current source 10. The external current source 10 of the cylinder is provided with different current values, so that the tested magnetometer probe 14 works under different magnetic field environments, the nonmagnetic turntable stage 3 is rotated, and a plurality of groups of Y-axis magnetic field data B of 0-degree positions and 180-degree positions are recorded 1 And B 2 . The data can be arranged to obtain the Y-axis magnetic field measured by the measured magnetometer probe 14 when the nonmagnetic turntable stage 3 rotates from the 0 DEG position to the 180 DEG position under a certain magnetic field environment as shown in figure 5.
Using the magnetic field data measured by the measured magnetometer probe 14, the Y-axis zero accuracy Δb of the measured magnetometer probe 14 is obtained, where Δb= (B) 1 +B 2 )/2. In practical application, as a preferred embodiment, the non-magnetic turntable stage 3 is rotated by different angles or is provided with single-axis, double-axis and three-axis artificial magnetic field coils for measuring the zero point accuracy of different axial directions of the magnetometer.
Example 4:
this embodiment provides a method of measuring the difference in steering of a scalar magnetometer by means of a magnetic field controllable angle controllable magnetic test device as shown in fig. 4 (a) and 4 (b). The scalar magnetometer includes: a measured magnetometer probe 14 and a measured magnetometer controller 11; the method comprises the following steps:
the probe 14 of the magnetic force instrument to be measured penetrates into the magnetic shielding cylinder 1 through a through hole above the magnetic shielding cylinder 1 and is fixed in the center of the non-magnetic turntable objective table 3.
The embodiment is used for measuring the steering difference of the magnetometer in the Y-axis direction, a first artificial magnetic field coil 8 and a second artificial magnetic field coil 9 are placed in the Y-axis direction in the cylinder, and the magnetic shielding cylinder cover 2 is closed, so that the magnetic shielding cylinder cover 2 and the magnetic shielding cylinder 1 shield the earth magnetic field and the external disturbance magnetic field;
the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 generate a stable magnetic field B of 100nT in the Y direction under the driving of the in-cylinder current source 10.
In the initial position, the measured magnetometer controller 11 controls the measured magnetometer probe 14 to start operating. Recording the initial position as a 0 DEG position, and recording magnetic field data B0 in the Y-axis direction measured by the measured magnetometer probe 14 at the 0 DEG position;
the non-magnetic rotary table object stage 3 is rotated for n different angles in turn within 360 degrees, and the corresponding magnetic field intensity Bn under different angles can be obtained. The rotation of 360 degrees is carried out, and based on n magnetic field intensities Bn, the steering difference data of 360 degrees detected by the detected magnetometer can be obtained.
In practical application, as a preferred embodiment, the non-magnetic turntable stage 3 is rotated by different angles or is provided with single-axis, double-axis and three-axis artificial magnetic field coils for measuring the steering differences of different axial directions of the magnetometer.
Example 5:
this embodiment provides a method of measuring magnetometer range and linearity by means of a magnetic field controllable angle controllable magnetic test device as shown in fig. 4 (a) and 4 (b). The magnetometer comprises: a measured magnetometer probe 14 and a measured magnetometer controller 11, the method comprising the steps of:
the probe 14 of the magnetic force instrument to be measured penetrates into the magnetic shielding cylinder 1 through a through hole above the magnetic shielding cylinder 1 and is fixed in the center of the non-magnetic turntable objective table 3. The first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 are arranged in the Y-axis direction in the cylinder, and the magnetic shielding cylinder cover 2 is closed. The first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 are driven by an external current source 10 to generate a stable magnetic field B'.
The external current source 10 is provided with different current values I 1 ，I 2 ，I 3 ，···I n The magnetic field size B 'generated by the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9 on the Y axis under the driving of corresponding current is calculated through the coil coefficients of the first artificial magnetic field coil 8 and the second artificial magnetic field coil 9' 1 ，B′ 2 ，B′ 3 ，···B′ n . Under the control of the magnetometer controller 11, the measured magnetometer probe 14 starts to work, and the magnetic field data B measured by the measured magnetometer probe 14 under different magnetic field environments is recorded 1 ，B 2 ，B 3 ，···B n ，
And according to the measured multiple groups of experimental data, the measuring range and the linearity of the measured magnetometer probe 14 in the Y-axis direction are drawn.
In this embodiment a set of first artificial magnetic field coils 8 and second artificial magnetic field coils 9 are placed on the Y-axis. In practical application, as a preferred embodiment, the non-magnetic turntable stage 3 is rotated by different angles or is provided with single-axis, double-axis and three-axis artificial magnetic field coils for measuring the measuring range and linearity of the magnetometer in different axial directions.
As can be seen from the above detailed description of the invention, the magnetic testing device with controllable magnetic field and controllable angle provided by the invention shields the external magnetic field through the magnetic shielding component, so that the test is not disturbed by the external magnetic field, and the non-magnetic turntable component drives the test piece to rotate, thereby having strong universality, being applicable to any magnetic field measurement application related to the rotation angle, such as magnetic measurement of a practical material, zero accuracy measurement of a vector magnetometer, steering difference measurement of a scalar magnetometer and measurement of the range and linearity of the magnetometer; when the magnetic field controllable angle controllable magnetic testing device is used for testing the performance of magnetometers, the tested magnetometers probe 14 can be placed in the center of the non-magnetic turntable objective table through the through hole above the shielding cylinder 1. According to the axial requirement of measurement and the position of the rotary non-magnetic turntable stage, artificial magnetic field coils in different directions can be placed in the center of the shielding cylinder 1, the artificial magnetic field coils can provide magnetic fields required by the test under the drive of a cylinder external current source 10, and the zero accuracy test of the vector magnetometer, the steering difference test of the scalar magnetometer and the like can be performed in the direction of the rotary stage.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and are not limiting. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the appended claims.
Claims (9)
1. A magnetic testing device with controllable angle of magnetic field, characterized in that the magnetic testing device comprises: a magnetic shield assembly and a nonmagnetic turntable assembly; wherein,
the magnetic shield assembly includes: a magnetic shielding cylinder (1) provided with a magnetic shielding cylinder cover (2) for shielding the earth magnetic field and the external disturbance magnetic field;
the nonmagnetic turntable assembly comprises: a non-magnetic turntable objective table (3), a non-magnetic turntable driving rod (4), a non-magnetic turntable driver (5) and a non-magnetic turntable controller (6); wherein,
one end of the non-magnetic turntable driving rod (4) passes through a through hole at one side of the magnetic shielding barrel (1) to enter the magnetic shielding barrel (1), is connected with the non-magnetic turntable objective table (3), and the other end of the non-magnetic turntable driving rod is connected with the non-magnetic turntable driver (5) arranged outside the magnetic shielding barrel (1);
the non-magnetic turntable driver (5) and the non-magnetic turntable controller (6) are both arranged outside the magnetic shielding barrel (1) so as to avoid influencing the magnetic field in the magnetic shielding barrel (1); the non-magnetic turntable driver (5) drives the non-magnetic turntable object table (3) to rotate through the non-magnetic turntable driving rod (4) under manual control or under electric control of the non-magnetic turntable controller (6), and a tested piece (7) arranged on the non-magnetic turntable object table (3) rotates along with the non-magnetic turntable object table (3).
2. The magnetic testing device with controllable angle of magnetic field according to claim 1, wherein the magnetic shielding cylinder (1) is provided with a through hole at a center corresponding position of the non-magnetic turntable stage (3) for allowing the tested piece (7) to pass through the through hole and be fixed on the non-magnetic turntable stage (3).
3. The magnetic testing device with controllable angle of magnetic field according to claim 2, wherein the nonmagnetic turntable driver (5) drives the nonmagnetic turntable stage (3) to rotate 360 degrees in all directions through the nonmagnetic turntable driving rod (4) under manual control or under electric control of the nonmagnetic turntable controller (6).
4. A magnetic field controllable angle controllable magnetic test device according to claim 3, further comprising: a monitoring magnetometer probe (12) placed inside the magnetic shielding barrel (1); the monitoring magnetometer probe (12) is arranged perpendicular to the axial direction of the nonmagnetic turntable driving rod (4) and is used for monitoring the magnetic field of the tested piece (7); the connecting wire of the monitoring magnetometer probe (12) passes through the through hole of the magnetic shielding barrel (1) and is connected with the monitoring magnetometer probe controller (13) arranged outside the magnetic shielding barrel (1).
5. A magnetic field controllable angle controllable magnetic test device according to claim 3, further comprising: the magnetic field generating element is arranged inside the magnetic shielding barrel (1) and is used for providing a controllable artificial magnetic field; wherein,
the magnetic field generating element includes: a group of artificial magnetic field coils or a plurality of groups of artificial magnetic field coils with different axial directions which are arranged in the magnetic shielding barrel (1), wherein each group of artificial magnetic field coils comprises: the first artificial magnetic field coils (8) and the second artificial magnetic field coils (9) are symmetrically arranged on two sides of the non-magnetic turntable objective table (3) and are used for providing the controllable artificial magnetic field;
the first artificial magnetic field coil (8) and the second artificial magnetic field coil (9) are driven by an external cylinder current source (10) arranged outside the magnetic shielding cylinder (1); the external cylinder current source (10) is connected with the first artificial magnetic field coil (8) and the second artificial magnetic field coil (9) by utilizing a lead penetrating through a through hole of the magnetic shielding cylinder (1).
6. A method of measuring the magnetic moment of a material, based on the magnetic field controllable angle controllable magnetic test device of claim 4, the method comprising the steps of:
fixing the measured material at the center of the non-magnetic rotary table objective table (3);
closing the magnetic shielding cylinder cover (2) to shield the magnetic shielding cylinder cover (2) and the magnetic shielding cylinder (1) from the earth magnetic field and the external disturbance magnetic field;
rotating the non-magnetic rotary table stage (3) to enable the measured material to rotate one 360 degrees or continuously rotate a plurality of 360 degrees along with the non-magnetic rotary table stage (3), and simultaneously utilizing the monitoring magnetometer probe (12) to measure continuously-changed magnetic field data in the rotating process of the non-magnetic rotary table stage (3);
taking as the continuous magnetic field strength B the continuously variable magnetic field data or the average of the continuously variable magnetic field data over a plurality of 360 DEG measured by a monitoring magnetometer probe (12) M The method comprises the steps of carrying out a first treatment on the surface of the According to the continuous magnetic field intensity B M The magnetic moment of the measured material is calculated according to the change of the rotation angle and the relation with the distance L from the monitoring magnetometer probe (12) to the center of the measured material, so as to be used for evaluating the residual magnetism of the measured material.
7. A method of measuring zero accuracy of a vector magnetometer implemented based on the magnetic field controllable angle controllable magnetic test device of claim 5, the vector magnetometer comprising: a measured magnetometer probe (14) and a measured magnetometer controller (11); the method comprises the following steps:
penetrating a probe (14) of a magnetic force instrument to be measured into the magnetic shielding cylinder through a through hole above the magnetic shielding cylinder (1), and fixing the probe in the center of the non-magnetic turntable objective table (3);
closing the magnetic shielding cylinder cover (2) to shield the magnetic shielding cylinder cover (2) and the magnetic shielding cylinder (1) from the earth magnetic field and the external disturbance magnetic field;
opening the magnetometer to be tested controller (11) and the magnetometer to be tested probe (14) to enable the magnetometer to be tested probe (14) to start working based on the control of the magnetometer to be tested controller (11); the initial position of the non-magnetic turntable object stage (3) is set as a 0 DEG position, and magnetic field data B in any direction measured by a measured magnetometer probe (14) at the 0 DEG position is recorded 1 This direction is denoted as the Y-axis direction;
rotating the nonmagnetic rotary table stage (3), rotating the detected magnetic force instrument probe (14) along with the nonmagnetic rotary table stage (3) in the Y-axis direction by 180 degrees, recording the position of the nonmagnetic rotary table stage (3) after stopping rotating as a 180-degree position, and recording magnetic field data B in the Y-axis direction detected by the detected magnetic force instrument probe (14) at the 180-degree position 2 ；
The external cylinder current source (10) is provided with a plurality of different current values, and the first artificial magnetic field of a group of artificial magnetic field coils in the Y-axis direction is driven by the external cylinder current source (10)The coil (8) and the second artificial magnetic field coil (9) generate a plurality of stable magnetic fields B with the Y-axis direction corresponding to the current value, so that the tested magnetometer probe (14) respectively works under each stable magnetic field B environment, the nonmagnetic turntable objective table (3) is rotated and the magnetic field data B of the Y-axis direction at the 0-degree position under each stable magnetic field B environment is recorded 1 And 180 DEG position Y-axis direction magnetic field data B 2 ；
A plurality of magnetic field data B measured by the measured magnetometer probe (14) 1 And a plurality of magnetic field data B 2 Obtaining the corresponding Y-axis zero accuracy delta B of the vector magnetometer in each magnetic field environment, wherein delta B= (B) 1 +B 2 )/2。
8. A method of measuring a scalar magnetometer steering differential based on the magnetic field controllable angle controllable magnetic test device implementation of claim 5, the scalar magnetometer comprising: a measured magnetometer probe (14) and a measured magnetometer controller (11); the method comprises the following steps:
fixing a detected magnetometer probe (14) at the center of the nonmagnetic turntable objective table (3);
closing the magnetic shielding cylinder cover (2) to shield the magnetic shielding cylinder cover (2) and the magnetic shielding cylinder (1) from the earth magnetic field and the external disturbance magnetic field;
opening an external current source (10) of the cylinder to enable a first artificial magnetic field coil (8) and a second artificial magnetic field coil (9) of any group of artificial magnetic field coils to generate a stable magnetic field B of 100nT under the drive of the external current source (10) of the cylinder; opening a measured magnetometer controller (11) and a measured magnetometer probe (14), so that the measured magnetometer probe (14) works based on the control of the measured magnetometer controller (11); setting the initial position of the non-magnetic turntable objective table (3) as a 0 DEG position, recording magnetic field data B0 of a detected magnetometer probe (14) in any direction when the 0 DEG position is recorded, and recording the direction as a Y-axis direction;
rotating the non-magnetic rotary table object stage (3) for n different angles within 360 degrees to obtain magnetic field intensities Bn corresponding to the n angles respectively; based on n magnetic field strengths Bn, steering difference data of 360 degrees of the scalar magnetometer are obtained.
9. A method of measuring magnetometer range and linearity based on the controllable angle of field controllable magnetic test device implementation of claim 5, the magnetometer comprising: a magnetometer under test probe (14) and a magnetometer under test controller (11), the method comprising the steps of:
fixing a detected magnetometer probe (14) at the center of the nonmagnetic turntable objective table (3);
opening an external current source (10) of the cylinder to enable a first artificial magnetic field coil (8) and a second artificial magnetic field coil (9) of any group of artificial magnetic field coils to generate a stable magnetic field B' under the driving of the external current source (10) of the cylinder;
the external current source (10) is arranged to generate different current values I 1 ，I 2 ，I 3 ，···I n Calculating to obtain a magnetic field value B 'generated by the first artificial magnetic field coil (8) and the second artificial magnetic field coil (9) under corresponding current driving through the coil coefficients of the first artificial magnetic field coil (8) and the second artificial magnetic field coil (9)' 1 ，B′ 2 ，B′ 3 ，···B′ n ；
Opening a measured magnetometer controller (11) and a measured magnetometer probe (14), enabling the measured magnetometer probe (14) to work based on the control of the measured magnetometer controller (11), and respectively recording a magnetic field value B' 1 ，B′ 2 ，B′ 3 ，···B′ n In the environment, the corresponding magnetic field data B in any direction measured by the measured magnetometer probe (14) 1 ，B 2 ，B 3 ，···B n And the direction is noted as the Y-axis direction;
based on the magnetic field value B 'generated by the first artificial magnetic field coil (8) and the second artificial magnetic field coil (9)' 1 ，B′ 2 ，B′ 3 ，···B′ n And corresponding magnetic field data B measured by the measured magnetometer probe (14) 1 ，B 2 ，B 3 ，···B n And drawing the measuring range and the linearity of the magnetometer in the Y-axis direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311253332.6A CN117347929A (en) | 2023-09-26 | 2023-09-26 | Magnetic testing device with controllable angle of magnetic field and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311253332.6A CN117347929A (en) | 2023-09-26 | 2023-09-26 | Magnetic testing device with controllable angle of magnetic field and measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117347929A true CN117347929A (en) | 2024-01-05 |
Family
ID=89364239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311253332.6A Pending CN117347929A (en) | 2023-09-26 | 2023-09-26 | Magnetic testing device with controllable angle of magnetic field and measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117347929A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11330768A (en) * | 1998-05-18 | 1999-11-30 | Shimadzu Corp | Magnetic shielding device |
| JP2009103534A (en) * | 2007-10-22 | 2009-05-14 | Okayama Univ | Magnetic measurement apparatus |
| US20150069846A1 (en) * | 2013-09-11 | 2015-03-12 | Seiko Epson Corporation | Magnetic shielding apparatus and magnetic shielding method |
| CN105259529A (en) * | 2015-11-23 | 2016-01-20 | 上海卫星装备研究所 | Device and method of calibration of satellite magnetic field test system |
| CN106950516A (en) * | 2017-03-24 | 2017-07-14 | 中国科学院上海微系统与信息技术研究所 | A kind of weak swirl magnetic field measuring device and method |
| CN109870662A (en) * | 2019-03-28 | 2019-06-11 | 北京大学 | A kind of exchange magnetometer survey range and linearity calibration method and device |
| CN112881953A (en) * | 2021-01-11 | 2021-06-01 | 中国科学院国家空间科学中心 | Measuring device and measuring method for extremely weak residual magnetism material |
| CN113866692A (en) * | 2021-10-26 | 2021-12-31 | 北京卫星环境工程研究所 | Extremely weak remanence measurement system and measurement method for spacecraft component |
| WO2023088352A1 (en) * | 2021-11-19 | 2023-05-25 | 中科知影(北京)科技有限公司 | Multi-detection-mode magnetic field compensation device, magnetic field compensation method, and magnetic shielding system |
| CN116413646A (en) * | 2023-02-23 | 2023-07-11 | 中国人民解放军海军工程大学 | Magnetic shielding equipment magnetic permeability measuring device |
| CN116449273A (en) * | 2023-06-19 | 2023-07-18 | 北京航空航天大学 | Measuring device and method for extremely weak magnetic field signal |
-
2023
- 2023-09-26 CN CN202311253332.6A patent/CN117347929A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11330768A (en) * | 1998-05-18 | 1999-11-30 | Shimadzu Corp | Magnetic shielding device |
| JP2009103534A (en) * | 2007-10-22 | 2009-05-14 | Okayama Univ | Magnetic measurement apparatus |
| US20150069846A1 (en) * | 2013-09-11 | 2015-03-12 | Seiko Epson Corporation | Magnetic shielding apparatus and magnetic shielding method |
| CN105259529A (en) * | 2015-11-23 | 2016-01-20 | 上海卫星装备研究所 | Device and method of calibration of satellite magnetic field test system |
| CN106950516A (en) * | 2017-03-24 | 2017-07-14 | 中国科学院上海微系统与信息技术研究所 | A kind of weak swirl magnetic field measuring device and method |
| CN109870662A (en) * | 2019-03-28 | 2019-06-11 | 北京大学 | A kind of exchange magnetometer survey range and linearity calibration method and device |
| CN112881953A (en) * | 2021-01-11 | 2021-06-01 | 中国科学院国家空间科学中心 | Measuring device and measuring method for extremely weak residual magnetism material |
| CN113866692A (en) * | 2021-10-26 | 2021-12-31 | 北京卫星环境工程研究所 | Extremely weak remanence measurement system and measurement method for spacecraft component |
| WO2023088352A1 (en) * | 2021-11-19 | 2023-05-25 | 中科知影(北京)科技有限公司 | Multi-detection-mode magnetic field compensation device, magnetic field compensation method, and magnetic shielding system |
| CN116413646A (en) * | 2023-02-23 | 2023-07-11 | 中国人民解放军海军工程大学 | Magnetic shielding equipment magnetic permeability measuring device |
| CN116449273A (en) * | 2023-06-19 | 2023-07-18 | 北京航空航天大学 | Measuring device and method for extremely weak magnetic field signal |
Non-Patent Citations (2)
| Title |
|---|
| 庞鸿锋: "三轴磁通门传感器误差分析与校正", 中国优秀硕士学位论文全文数据库工程科技Ⅱ辑, no. 2, 15 February 2012 (2012-02-15), pages 11 - 16 * |
| 陈斯文等: "双星星上部件磁测及磁测设备", 地球物理学进展, vol. 19, no. 4, 31 December 2004 (2004-12-31), pages 893 - 897 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11860126B2 (en) | Eddy current nondestructive evaluation device with rotating permanent magnets and pickup coils | |
| CN108732519B (en) | Wireless charging electromagnetic field three-dimensional magnetic measurement method and device | |
| CN110261800A (en) | One kind being directed to ferritic high precision low frequency complex permeability measuring device and method | |
| CN114089243B (en) | Vector atomic magnetometer device and method based on magnetic field rotation modulation method | |
| WO2018112049A2 (en) | Non-contact magnetostrictive sensor alignment methods and systems | |
| Zhou et al. | A harmonic coil measurement system based on a dynamic signal acquisition device | |
| Wang et al. | A highly sensitive magnetometer based on the Villari effect | |
| CN117347929A (en) | Magnetic testing device with controllable angle of magnetic field and measuring method | |
| Vosegaard et al. | Improved hardware and software for single-crystal NMR spectroscopy | |
| US6304080B1 (en) | System for verifying the location of a plurality of physical features relative to magnetic poles arranged on a complex magnetic element | |
| EP1149300B1 (en) | Device and method for determining a magnetic field | |
| CN115718273B (en) | Device for measuring object magnetic susceptibility based on magnetic induction intensity and measuring method thereof | |
| Keller et al. | Technologies for precision magnetic field mapping | |
| CN114236452A (en) | MWD guide probe single-shaft constant magnetic calibration method | |
| EP1353168A2 (en) | Apparatus for monitoring extent of cure of a coating | |
| CN118011289A (en) | Extremely weak magnetism measuring device and method based on atomic magnetometer | |
| Campmany et al. | A new bench concept for measuring magnetic fields of big closed structure | |
| JPH06265611A (en) | Magnetic-field measuring apparatus | |
| US20230417849A1 (en) | Split self-shielded gradient coil system, with power supply system for individually adjusting currents of sub-coil groups | |
| JP2021534397A (en) | Methods and equipment for inspecting the condition of the cannula mounted on the syringe | |
| CN117073518B (en) | Constant force measuring device | |
| Paige et al. | A robust inexpensive torque magnetometer with on-line data analysis | |
| Barnett | Method for Determining Magnetic Moments and for Measuring Susceptibilities and Permeabilities | |
| JP2001174440A (en) | Method and apparatus for diagnosing defect | |
| CN117310575A (en) | Calibration system and method for rotor meter magnetic detection equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |