CN110308311B - Three-dimensional magnetic field generating device based on two-dimensional rotating machine control - Google Patents
Three-dimensional magnetic field generating device based on two-dimensional rotating machine control Download PDFInfo
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- CN110308311B CN110308311B CN201910638665.8A CN201910638665A CN110308311B CN 110308311 B CN110308311 B CN 110308311B CN 201910638665 A CN201910638665 A CN 201910638665A CN 110308311 B CN110308311 B CN 110308311B
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Abstract
The invention discloses a three-dimensional magnetic field generating device based on two-dimensional rotating machine control, relates to generation and control of a magnetic field, and belongs to the technical field of magnetic field devices. The device comprises a platform supporting module, a vertically rotatable sensor carrying module and a horizontally rotatable magnetic field generating module. The horizontal plane is an XY plane, and the vertical plane is an XZ plane; the platform supporting module is used for supporting the horizontal rotatable magnetic field generating module and the vertical rotatable sensor carrying module. The invention utilizes the two-dimensional rotation of the magnetic field generating device and the sensor objective table in two mutually vertical planes, and simultaneously changes the current of the coil to control the size of the magnetic field, thereby realizing the uniform and controllable three-dimensional magnetic field effect around the sensor; the three-dimensional magnetic field generating device is simple to process and convenient to operate, and can be used for electromagnetic experiments in a three-dimensional magnetic field environment.
Description
Technical Field
The invention belongs to the technical field of magnetic field devices, and particularly relates to a three-dimensional magnetic field generating device controlled based on a two-dimensional rotator.
Background
The magnetic field is an important energy form in the world at present, and substances show various physical and chemical phenomena under the action of the magnetic field, so that the magnetic field can be used as an important means for human beings to detect the world. Meanwhile, the development of scientific technology puts forward new requirements on the magnetic field environment, and the magnetic field generating device is required to have a large magnetic field range and good uniformity and to be capable of generating a two-dimensional or even three-dimensional magnetic field. The vector magnetic field environment has great significance in the fields of geoscience, medicine, biology and materials science, and relates to mathematics, physics, chemistry, biology and medicine. Therefore, in order to obtain the response of the sensor to the vector magnetic field, it is necessary to create a vector magnetic field generating device.
In order to obtain a magnetic field with good uniformity, most of the conventional magnetic field generating devices at present use the magnetic effect of current as a principle, and chinese patent (a magnetic field generating device, CN 207834046U) discloses a device for generating a magnetic field by using an electromagnet, but the direction of the magnetic field obtained by the magnetic field generating device is specific and cannot meet the requirements of some multidimensional magnetic field direction experiments. A part of magnetic field devices can obtain a magnetic field with a variable direction by applying a rotating device, and Chinese patent (a 360-degree rotatable electromagnetic field device, CN 204045315U) provides a 360-degree electromagnetic field device for a magnetics experiment, wherein the device drives the magnetic field device to rotate through an electromagnetic field connecting shaft, but only can realize the rotation of the magnetic field device on a horizontal plane; chinese patent (a rotating magnetic field device, CN106693817A) proposes a device for controlling the rotation of electromagnetic field by a rotating system, but only can realize the circular rotation motion perpendicular to the direction of magnetic field; chinese patent (a rotating magnetic field generating device, CN106693817A) proposes a rotating magnetic field generating device for magnetic carrier separation technology, which drives a magnetic field generating structure to rotate at a certain speed by a power device, but only generates a magnetic field effect rotating along a radial direction, and none of the above devices can achieve the effect of a three-dimensional magnetic field.
Therefore, in the present invention, it is a problem to be solved by those skilled in the art to fabricate a three-dimensional magnetic field apparatus capable of controlling the magnitude and direction of a magnetic field.
Disclosure of Invention
Aiming at the technical defects in the prior art, the invention provides a three-dimensional magnetic field generating device based on two-dimensional rotating machine control, which can obtain a uniform and controllable three-dimensional magnetic field effect around a sensor.
The technical scheme adopted by the invention is as follows:
a three-dimensional magnetic field generating device based on two-dimensional rotating machine control comprises a platform supporting module, a vertically rotatable sensor carrying module and a horizontally rotatable magnetic field generating module.
The platform support module comprises a chassis 15 and a load bearing column 11. The chassis 15 is provided with a plurality of countersunk threaded holes for being in threaded connection with the first motor bracket 13 and the second motor bracket 10 and fixing the chassis 15 on the optical platform; the bearing support columns 11 are respectively fixed on the periphery of the chassis 15, and threaded holes are formed in the top ends of the bearing support columns 11 and used for being connected with inner rings of the bearings 17.
The vertically rotatable sensor carrier module comprises a first driven gear 2, a sensor carrier table 3, a Z-shaped sensor support 4, a first synchronous belt 5, a first driving gear 12, a first motor support 13 and a first motor 14. The lower end of the Z-shaped sensor bracket 4 is fixed at the center of the chassis 15; the first motor bracket 13 is fixed on the upper surface of the chassis 15, and the first motor 14 is fixed on the first motor bracket 13; an output shaft of the first motor 14 is connected with a first driving gear 12, and the first driving gear 12 is connected with a first driven gear 2 through a first synchronous belt 5; the first driven gear 2 is connected with the sensor objective table 3 through a shaft and is fixed at the upper end of the Z-shaped sensor bracket 4; the sensor objective table 3 is provided with a groove for fixing the sensor, and the structural characteristics of the Z-shaped sensor support 4 are utilized to ensure that the sensor is located at the center of the magnetic field.
The horizontal rotatable magnetic field generation module comprises a magnetic field generation device 1, a scale turntable 7, a second driving gear 8, a second motor 9, a second motor support 10, a second driven gear 16, a bearing 17 and a second synchronous belt 18. The bearing 17 comprises an inner ring and an outer ring, threaded holes are formed in the inner ring and the outer ring, the inner ring is connected with the bearing support 11, and the outer ring is connected with the scale turntable 7; a circular boss is processed on the lower surface of the scale turntable 7; the upper surface of the scale turntable 7 is provided with a trapezoidal groove 6 for connecting the magnetic field generating device 1; the two magnetic field generating devices 1 are electromagnetic coils, are symmetrically distributed on two sides of the sensor object stage 3 and are fixed in the trapezoidal groove 6; the second motor bracket 10 is fixed on the upper surface of the chassis 15, and the second motor 9 is fixed on the second motor bracket 10; an output shaft of the second motor 9 is connected with a second driving gear 8, the second driving gear 8 is connected with a second driven gear 16 through a second synchronous belt 18, and the second driven gear 16 is fixed on a circular boss on the lower surface of the scale turntable 7.
Further, the first motor 14 and the second motor 9 are respectively connected with respective controllers, and the rotation angle, speed, stop time and action number of the two motors are set through the controllers, so that the direction change of the continuous magnetic field is realized.
Further, the gear ratio of the first driving gear 12 to the first driven gear 2 is 1:2, and the gear ratio of the second driving gear 8 to the second driven gear 16 is 1: 8.
Further, the magnetic field generating device 1 realizes a direct current magnetic field or an alternating current magnetic field by selecting a direct current power supply or an alternating current power supply.
Further, the housing of the magnetic field generating device 1 is made of aluminum, and the rest of the magnetic field generating device 1 is made of non-metallic materials, so that the influence on the magnetic field distribution is reduced.
Further, rectangular grooves are formed in the bottom surface and the side surface of the first motor support 13 and used for adjusting the distance between the first driving gear 12 and the first driven gear 2; the second motor support 10 is provided with a rectangular groove and a threaded hole for adjusting the distance between the second driving gear 8 and the second driven gear 16.
The invention has the beneficial effects that: the three-dimensional magnetic field generating device can achieve the effect of a three-dimensional magnetic field around the sensor by two-dimensionally rotating the magnetic field generating device of the horizontal rotatable magnetic field generating module and the sensor carrying platform of the vertical rotatable sensor carrying module in two mutually perpendicular planes and simultaneously changing the current of the coil to control the size of the magnetic field, so that the rotating angle precision is 1 degree, the maximum magnetic field at the center of the sensor carrying platform reaches 260Gs, and the uniformity of the magnetic field intensity in the range of 1cm in the axial direction of the magnetic field generating device is within 1 percent. The three-dimensional magnetic field generating device is simple to process and convenient to operate, and can be used for electromagnetic experiments in a three-dimensional magnetic field environment.
Drawings
Fig. 1 is a schematic diagram of a three-dimensional magnetic field generating device based on two-dimensional rotating machine control according to the invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a left side view of fig. 1.
Fig. 4 is a top view of fig. 1.
Fig. 5 is a diagram of a vertically rotatable sensor carrier module apparatus.
Fig. 6(a) is a simulation result diagram of the X-Y plane spatial magnetic field distribution of the three-dimensional magnetic field generating device when it is in operation.
Fig. 6(b) is a simulation result diagram of the spatial magnetic field distribution in the X-Z plane of the three-dimensional magnetic field generating device when the three-dimensional magnetic field generating device is in operation.
FIG. 6(c) is a diagram showing the simulation result of the spatial magnetic field distribution in the Y-Z plane of the three-dimensional magnetic field generator during operation.
Fig. 7 shows the distribution of the coil axial magnetic field at each load current.
In the figure: 1. a magnetic field generating device; 2. a first driven gear; 3. a sensor stage; a Z-shaped sensor support; 5. a first synchronization belt; 6. a trapezoidal groove; 7. a scale dial; 8. a second driving gear; 9. a second motor; 10. a second motor support; 11. a load bearing strut; 12. a first drive gear; 13. a first motor bracket; 14. a first motor; 15. a chassis; 16. a second driven gear; 17. a bearing; 18. a second synchronous belt; 19. a first motor controller.
Detailed Description
The following detailed description of the invention refers to the accompanying drawings.
The invention provides a three-dimensional magnetic field generating device based on two-dimensional rotating machine control, which has a structure shown in figures 1, 2, 3 and 4.
The platform support module comprises a chassis 15 and a load bearing column 11. The chassis 15 is provided with a plurality of countersunk threaded holes, one part of the countersunk threaded holes are in threaded connection with the first motor bracket 13 and the second motor bracket 10 to support the first motor 14 and the second motor 9, and the other part of the countersunk threaded holes fix the chassis 15 on the optical platform. The lower ends of four bearing support columns 11 are respectively fixed around the chassis 15, and the top ends of the bearing support columns 11 are provided with threaded holes which are in threaded connection with the inner ring of the bearing 17.
The vertically rotatable sensor stage module includes a first driven gear 2, a sensor stage 3, a Z-shaped sensor support 4, a first timing belt 5, a first driving gear 12, a first motor support 13, and a first motor 14. The Z-shaped sensor bracket 4 is tightly matched and connected with a square groove at the center of the chassis 15. The bottom surface and the side surface of the first motor support 13 are respectively provided with two rectangular grooves, the two rectangular grooves on the bottom surface are used for adjusting the horizontal distance between the first driving gear 12 and the first driven gear 2, and meanwhile, the first motor support 13 is fixed on the chassis 15; the rectangular groove of the side is used for adjusting the vertical distance between the first driving gear 12 and the first driven gear 2, and simultaneously fixing the first motor 14 on the first motor bracket 13. The first driving gear 12 is connected with the first driven gear 2 through a first synchronous belt 5, and the first driving gear 12 is fixed on an output shaft of the first motor 14; the first driven gear 2 is connected to the sensor stage 3 via a shaft and fixed to a Z-shaped sensor holder 4. The gear ratio of the first driving gear 12 to the first driven gear 2 is 1:2, and accurate transmission of the gears is ensured by adjusting the distance between the two gears. The sensor objective table 3 is provided with a groove which is positioned in the center of the magnetic field generating device 1, the thickness of the groove is 5mm, and the characteristic of the structure of the Z-shaped sensor support 4 is utilized to ensure that the sensor is positioned in the center of the magnetic field.
The horizontal rotatable magnetic field generation module comprises a magnetic field generation device 1, a scale turntable 7, a second driving gear 8, a second motor 9, a second motor support 10, a second driven gear 16, a bearing 17 and a second synchronous belt 18. The bearing 17 comprises an inner ring and an outer ring, threaded holes are formed in the inner ring and the outer ring, the inner ring is connected with the bearing support 11, and the outer ring is connected with the scale turntable 7; the upper surface of the scale turntable 7 is provided with a trapezoidal groove 6 for connecting the magnetic field generating device 1; the magnetic field generating devices 1 are electromagnetic coils, the total number of the magnetic field generating devices is two, the two magnetic field generating devices are fixed by a trapezoidal groove 6 on a scale turntable 7 and are symmetrically distributed on two sides of the sensor object stage 3. The second driving gear 8 is connected with a second driven gear 16 through a second synchronous belt 18, the second driving gear 8 is fixed on the second motor 9, the second driven gear 16 is fixed on a circular boss on the lower bottom surface of the scale turntable 7, and the gear ratio of the second driving gear 8 to the second driven gear 16 is 1: 8. The second motor support 10 is provided with threaded holes all around, fixes second motor 9 on second motor support 10, and the both sides of support are equipped with rectangular groove, can adjust the distance between second driving gear 8 and the second driven gear 16 through removing second motor support 10, guarantee the accurate drive ratio between two gears, fix second motor support 10 on chassis 15 simultaneously.
The first motor 14 and the second motor 9 are respectively connected with respective controllers, and the rotation speed, the angle, the stop time and the action number of the two motors are set through the controllers, so that the change of the direction of the continuous magnetic field is realized.
The shell of the magnetic field generating device 1 is made of aluminum materials, and the rest parts of the magnetic field generating device 1 are made of non-metal materials, so that the influence on the magnetic field distribution is reduced.
The power supply of the magnetic field generating device 1 is direct current, and when the energizing current is 9A, the intensity of the magnetic field central area reaches 260 Gs. Meanwhile, the magnetic field generating device 1 can also use an alternating current power supply to obtain an alternating current magnetic field.
The invention provides a motor controller of a three-dimensional magnetic field device based on two-dimensional rotating machine control, which takes a vertically rotatable sensor carrying module as an example as shown in figure 5. The first motor controller 19 is provided with buttons of rotation angle, speed, stop time and action number, the speed adjusting range is 1r/min-2000r/min, the angle adjusting range is 1-360 degrees, the stop time is 1-15min, the action number is the number of the set actions, the stop time is the time interval between the two rotation actions, and the angle precision of the controller is 1 degree. The first motor controller 19 can control the angle, speed and time of the first motor, and can also be configured with a plurality of rotational movements to control the vertical rotation angle of the sensing stage 3. The controller of the horizontally rotatable magnetic field generating module is the same as described above, and the second motor controller controls the horizontal rotation angle of the magnetic field generating device 1. The vertical rotation angle and the horizontal rotation angle of the sensor stage 3 and the magnetic field generating device 1 are controlled by the first motor controller 19 and the second motor controller, respectively, so that an effect of generating a three-dimensional magnetic field around the sensor can be obtained.
When the three-dimensional magnetic field generating device is used, firstly, a sensor is fixed on a groove of a sensor objective table 3, a second motor support 10 is used for adjusting the distance between a second driving gear 8 and a second driven gear 16 to tighten a second synchronous belt 18, and a first motor support 13 is used for adjusting the distance between a first driving gear 12 and a first driven gear 2 to tighten a first synchronous belt 5. The angle, speed, stop time and number of operations of the first motor 14 are set, and when the start key is pressed, the first motor 14 drives the first driving gear 12 to rotate the first driven gear 2 via the first timing belt 5, and the first driven gear 2 is connected to the sensor stage 3 via a shaft, so that the sensor stage 3 rotates at a predetermined rotation angle, speed, stop time and number of operations. The angle, speed, stop time and number of operations of the second motor 9 are set, and the start key is pressed, the second motor 9 drives the second driving gear 8 to rotate the second driven gear 16 through the second timing belt 18, and the second driven gear 16 is fixed on the scale dial 7 carrying the magnetic field generating device 1, so that the magnetic field generating device 1 rotates according to the predetermined rotation angle, speed, stop time and number of operations. When the gear rotation is completed, the effect of a three-dimensional magnetic field can be achieved around the sensor.
From the structural design of the three-dimensional magnetic field generating device, it was theoretically analyzed that when the energizing coil was powered by a 9A dc power supply, magnetic field distribution diagrams as shown in fig. 6(a), 6(b), and 6(c) were obtained, and the spatial uniformity of the magnetic field was good.
And (3) carrying out actual performance test on the magnetic field generating device by adopting a gauss meter, and measuring the distribution condition of the axial magnetic field of the coil under each load current, wherein as shown in fig. 7, when a 9A direct-current power supply is adopted for the electrified coil, the intensity of a central area of the magnetic field reaches 260Gs, and the uniformity of the magnetic field intensity in the range of 1cm in the axial direction of the magnetic field generating device is within 1%.
Claims (10)
1. A three-dimensional magnetic field generating device based on two-dimensional rotating machine control is characterized by comprising a platform supporting module, a vertically rotatable sensor carrying module and a horizontally rotatable magnetic field generating module;
the platform support module comprises a chassis (15) and a bearing support column (11); the chassis (15) is provided with a countersunk threaded hole for connecting the first motor bracket (13), the second motor bracket (10) and the bearing support column (11), and the chassis (15) is fixed on the optical platform;
the vertically rotatable sensor object carrying module comprises a first driven gear (2), a sensor object carrying table (3), a Z-shaped sensor support (4), a first synchronous belt (5), a first driving gear (12), a first motor support (13) and a first motor (14); the lower end of the Z-shaped sensor bracket (4) is fixed at the center of the chassis (15); the first motor bracket (13) is fixed on the upper surface of the chassis (15); the first motor (14) is fixed on the first motor bracket (13); an output shaft of the first motor (14) is connected with a first driving gear (12), and the first driving gear (12) is connected with a first driven gear (2) through a first synchronous belt (5); the first driven gear (2) is connected with the sensor objective table (3) through a shaft and is fixed at the upper end of the Z-shaped sensor bracket (4); the sensor objective table (3) is provided with a groove for connecting a sensor;
the horizontal rotatable magnetic field generation module comprises a magnetic field generation device (1), a scale turntable (7), a second driving gear (8), a second motor (9), a second motor bracket (10), a second driven gear (16), a bearing (17) and a second synchronous belt (18); the scale turntable (7) is arranged at the top end of the bearing support column (11) through a bearing (17); the upper surface of the scale turntable (7) is provided with a trapezoidal groove (6) for fixing the magnetic field generating device (1); the two magnetic field generating devices (1) are electromagnetic coils, are symmetrically distributed on two sides of the sensor object stage (3) and are fixed in the trapezoidal groove (6); the second motor support (10) is fixed on the upper surface of the chassis (15), and the second motor (9) is fixed on the second motor support (10); an output shaft of the second motor (9) is connected with a second driving gear (8), the second driving gear (8) is connected with a second driven gear (16) through a second synchronous belt (18), and the second driven gear (16) is fixed on the lower surface of the scale turntable (7).
2. The three-dimensional magnetic field generating device controlled based on the two-dimensional rotating machine as claimed in claim 1, wherein the gear ratio of the first driving gear (12) to the first driven gear (2) is 1: 2; the gear ratio of the second driving gear (8) to the second driven gear (16) is 1: 8.
3. The three-dimensional magnetic field generating device controlled based on the two-dimensional rotating machine as claimed in claim 1 or 2, characterized in that the first motor (14) and the second motor (9) are respectively connected with a controller, and the controller sets the rotation angle, the speed, the stop time and the number of actions of the two motors to realize the change of the continuous magnetic field direction.
4. The three-dimensional magnetic field generating device controlled based on the two-dimensional rotating machine is characterized in that the magnetic field generating device (1) is powered by a direct current power supply or an alternating current power supply so as to realize a direct current magnetic field or an alternating current magnetic field.
5. The three-dimensional magnetic field generating device controlled based on the two-dimensional rotator is characterized in that the magnetic field generating device (1) is powered by a direct current power supply or an alternating current power supply so as to realize a direct current magnetic field or an alternating current magnetic field.
6. The three-dimensional magnetic field generating device controlled based on the two-dimensional rotator is characterized in that the shell of the magnetic field generating device (1) is made of aluminum materials, and the rest of the magnetic field generating device (1) is made of non-metal materials, so that the influence on the magnetic field distribution is reduced.
7. The three-dimensional magnetic field generating device controlled based on the two-dimensional rotator is characterized in that the shell of the magnetic field generating device (1) is made of aluminum materials, and the rest part of the magnetic field generating device (1) is made of non-metallic materials, so that the influence on the magnetic field distribution is reduced.
8. The three-dimensional magnetic field generating device controlled based on the two-dimensional rotator is characterized in that the shell of the magnetic field generating device (1) is made of aluminum materials, and the rest part of the magnetic field generating device (1) is made of non-metallic materials, so that the influence on the magnetic field distribution is reduced.
9. The three-dimensional magnetic field generating device controlled based on the two-dimensional rotating machine according to claim 1, 2, 5, 7 or 8, wherein the bottom surface and the side surface of the first motor bracket (13) are provided with rectangular grooves for adjusting the distance between the first driving gear (12) and the first driven gear (2); the second motor support (10) is provided with a rectangular groove for adjusting the distance between the second driving gear (8) and the second driven gear (16).
10. The three-dimensional magnetic field generating device controlled based on the two-dimensional rotating machine according to claim 6, wherein the bottom surface and the side surface of the first motor support (13) are provided with rectangular grooves for adjusting the distance between the first driving gear (12) and the first driven gear (2); the second motor support (10) is provided with a rectangular groove for adjusting the distance between the second driving gear (8) and the second driven gear (16).
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| CN110837068B (en) * | 2019-11-25 | 2021-08-20 | 中北大学 | Device for maintaining constant uniform magnetic field locally and precisely adjusting direction strength |
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| DE2951018A1 (en) * | 1979-12-19 | 1982-02-11 | Wilfried H. Dr. 5483 Bad Neuenahr Bergmann | Spin-echo measurement at eigen temp. of specimen - using superconducting coil screened by second enclosing superconducting coil |
| US4486708A (en) * | 1981-12-21 | 1984-12-04 | Albert Macovski | Selective material projection imaging system using nuclear magnetic resonance |
| CN100588983C (en) * | 2006-12-08 | 2010-02-10 | 哈尔滨工业大学 | Three-dimension measuring apparatus and method for space magnetic field of minitype permanent-magnet |
| CN105652219B (en) * | 2014-12-03 | 2018-07-13 | 浙江工业职业技术学院 | A kind of connecting rod driving three-dimension reconstruction probe |
| CN104700978A (en) * | 2015-02-17 | 2015-06-10 | 中国人民解放军国防科学技术大学 | Magnetic field generation control device and method |
| US9772385B2 (en) * | 2015-04-09 | 2017-09-26 | International Business Machines Corporation | Rotating magnetic field hall measurement system |
| CN106093809A (en) * | 2016-05-23 | 2016-11-09 | 皖西学院 | A kind of hot-wire coil magnetic field measuring device and measuring method thereof |
| CN108761214B (en) * | 2018-04-26 | 2023-11-17 | 天津工业大学 | Self-adaptive surface magnetic field measurement platform and measurement method |
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