CN215641768U - Measuring device for magnetic field of (anti-) Helmholtz coil - Google Patents
Measuring device for magnetic field of (anti-) Helmholtz coil Download PDFInfo
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- CN215641768U CN215641768U CN202121487598.3U CN202121487598U CN215641768U CN 215641768 U CN215641768 U CN 215641768U CN 202121487598 U CN202121487598 U CN 202121487598U CN 215641768 U CN215641768 U CN 215641768U
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- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a measuring device for a (reverse) Helmholtz coil magnetic field, which comprises a moving track base, a coil base, Helmholtz coils, a support, a screw rod, a stepping motor, current-carrying square coils, a lever support, a first tension sensor, a rope and a magnetic field sensor, wherein the upper surface of the moving track base is fixedly connected with the coil base, the upper surface of the coil base is uniformly provided with two groups of Helmholtz coils, the screw rod is arranged in the two groups of Helmholtz coils, the magnetic field sensor is arranged on the screw rod, the left end of the screw rod is connected with the support through a bearing, the current-carrying square coil is arranged between the two groups of Helmholtz coils, the current-carrying square coil is connected with the right end of the lever through the rope, the left end of the lever is connected with the first tension sensor through the rope, the whole experimental process is monitored in real time through dynamic real-time and continuous signal acquisition, so that the experimental progress is high, The information is accurate, the error is small, the experiment time is greatly reduced, and the experiment efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of Helmholtz coil magnetic fields, in particular to a device for measuring an (anti-) Helmholtz coil magnetic field.
Background
Helmholtz coil's characteristics can produce wide uniform magnetic field region near the centre of the common axis, and operating space is big, be fit for doing jumbo size uniform magnetic field generator, so have great use value in fields such as scientific research, industry and medicine, can accomplish compensation, the research of biological magnetic field in earth magnetic field, also be commonly used for the measurement standard in low-intensity magnetic field, the present Helmholtz coil magnetic field measuring instrument in laboratory needs manual removal Hall element, manual drawing, scale reading has subjective error, manual drawing when handling data, measure uniform magnetic field scope inaccuracy, present to uniform magnetic field and gradient magnetic field's directly perceived demonstration experiment still not perfect, we not only need to use accurate experimental data to show magnetic field intensity, and still need to increase interest and the intuition of experiment with the demonstration experiment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of overcoming the existing defects, and can effectively solve the problems in the background technology by utilizing a computer to draw and display a uniform magnetic field formed by a Helmholtz coil and a gradient magnetic field formed by the Helmholtz coil.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a measuring device in (anti) helmholtz coil magnetic field, including the motion track base, the coil base, the helmholtz coil, a support, the lead screw, step motor, current-carrying square coil, the lever support, tension sensor I, rope and magnetic field sensor, motion track base upper surface and coil base fixed connection, coil base upper surface evenly is equipped with two sets of helmholtz coils, be equipped with the lead screw in two sets of helmholtz coils, be equipped with magnetic field sensor on the lead screw, and the lead screw right-hand member is connected with step motor's output shaft, the lead screw left end passes through bearing and leg joint, be equipped with current-carrying square coil between two sets of helmholtz coils, current-carrying square coil passes through the rope and is connected with the lever right-hand member, the lever left end passes through the rope and is connected with tension sensor, and the lever passes through the lever support and is connected with the motion track base.
Furthermore, the upper end face of the lever bracket is positioned at the center of the lever, and the lever bracket is positioned at the left side of the bracket.
Furthermore, be equipped with the ya keli drum in two sets of helmholtz coils, be equipped with the lead screw in the ya keli drum, the lead screw passes through the connecting piece and is connected with tension sensor two, and tension sensor two is connected with the prill through the rope, and the prill is located the ya keli drum.
Furthermore, the diameter of the excircle of the acrylic cylinder is smaller than that of the Helmholtz coil, and the two ends of the acrylic cylinder are connected with the coil base through the supporting frames.
Furthermore, the bottom edge of the current-carrying square coil is positioned at the central position between the two groups of Helmholtz coils and is vertical to the central axis.
Compared with the prior art, the utility model has the beneficial effects that: according to the device for measuring the magnetic field of the (reverse) Helmholtz coil, the PASCO software in a computer is introduced for real-time measurement of the magnetic field, and meanwhile, a stepping motor is used for realizing automation of a second tension sensor; in the experimental process, the first tension sensor and the second tension sensor are used for acquiring data in real time, so that the method is fast and convenient, and a new measuring means can be contacted; the magnetic induction intensity of each axial point of the Helmholtz coil can be seen from the curve very intuitively, and the measurement data and the result can be obtained very conveniently by using scientific PASCO software; compared with the collection of traditional experimental data, its advantage has: (1) the experimental precision is high, the data is accurate, and the error is small; (2) the experimental time is greatly reduced, and the experimental efficiency is improved; (3) the system can carry out dynamic, real-time and continuous signal acquisition, thereby carrying out real-time monitoring on the whole experimental process; (4) the traditional data acquisition method is improved, the classical experimental items, contents and ideas are retained, and the traditional technology and the modern technology are combined.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
In the figure: the device comprises a motion track base 1, a coil base 2, a Helmholtz coil 3, a support 4, a lead screw 5, a stepping motor 6, a current-carrying square coil 7, a lever 8, a lever support 9, a tension sensor I10, a rope 11, a magnetic field sensor 12, a metal ball 13, an acrylic cylinder 14 and a tension sensor II 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a measuring device for a (reverse) Helmholtz coil magnetic field comprises a moving track base 1, a coil base 2, Helmholtz coils 3, a support 4, a screw rod 5, a stepping motor 6, current-carrying square coils 7, a lever 8, a lever support 9, a first tension sensor 10, a rope 11 and a magnetic field sensor 12, wherein the upper surface of the moving track base 1 is fixedly connected with the coil base 2, the upper surface of the coil base 2 is uniformly provided with two groups of Helmholtz coils 3, the two groups of Helmholtz coils 3 are internally provided with the screw rod 5, the screw rod 5 is provided with the magnetic field sensor 12, the right end of the screw rod 5 is connected with an output shaft of the stepping motor 6, the left end of the screw rod 5 is connected with the support 4 through a bearing, the current-carrying square coils 7 are arranged between the two groups of Helmholtz coils 3, the current-carrying square coils 7 are connected with the right end of the lever 8 through the rope 11, and the left end of the lever 8 is connected with the first tension sensor 10 through the rope 11, the lever 8 is connected with the moving track base 1 through a lever support 9, the input end of the stepping motor 6 is electrically connected with the output end of an external power supply, the output end of the first tension sensor 10 is electrically connected with the input end of PASCO software in an external computer, the upper end face of the lever support 9 is located at the center of the lever 8, and the lever support 9 is located on the left side of the support 4.
Embodiment one, see fig. 1: the first tension sensor 10 acquires data of the current-carrying square coil 7, the data is displayed as the sum of the ampere force and the gravity of the current-carrying square coil 7, the current is changed, and the PASCO software in a computer is used for drawing images of the ampere force under different currents; then, the size of the product of the length of the magnetic field generated by the Helmholtz coil 3 and the length of the magnetic field of the current-carrying square coil 7 is fitted by using a program, the BIL value is calculated according to different currents and is compared with the value measured by the lever principle, and the product of B and L is accurately calculated by using the fitting of the computer program in consideration of the limited range of the uniform magnetic field, so that the experimental error is reduced, the numerical value of the BIL product is more accurately obtained and is better superposed with the ampere force measured by the lever principle, the relation between the B and L is verified, the experimental time is greatly reduced, and the experimental efficiency is improved.
Meanwhile, the stepping motor 6 drives the magnetic field sensor 12 to move through the screw rod 5, then the output end of the magnetic field sensor 12 is electrically connected with the input end of the PASCO in an external computer, software in the computer draws the magnetic field sensor 12 into an accurate image along with the change of the position, and the following conclusion is obtained through accurate measurement: when the current is positive, the magnetic field between the two sets of helmholtz coils 3 is found to be uniform, and when the current is negative, the magnetic field between the two sets of helmholtz coils 3 is found to be non-uniform, and this non-uniform magnetic field is mainly applied in atom cooling and confinement magneto-optical traps.
Example two, see fig. 2: an acrylic cylinder 14 is arranged in the two groups of Helmholtz coils 3, a screw rod 5 is arranged in the acrylic cylinder 14, the screw rod 5 is connected with a second tension sensor 15 through a connecting piece, the second tension sensor 15 is connected with a small metal ball 13 through a rope 11, the small metal ball 13 is positioned in the acrylic cylinder 14, the excircle diameter of the acrylic cylinder 14 is smaller than that of the Helmholtz coils 3, two ends of the acrylic cylinder 14 are connected with the coil base 2 through a support frame, so that the small metal ball 13 is positioned on the central axis of the two groups of Helmholtz coils 3, the output end of the second tension sensor 15 is electrically connected with the input end of a PASCO in an external computer, the bottom edge of the current-carrying square coil 7 is positioned at the central position between the two groups of Helmholtz coils 3 and is in a vertical state with the central axis, the stepping motor 6 is used as a power source and drives the second tension sensor 15 to move rightwards along the screw rod 5 through the connecting piece, in the process, the tension can show certain change under the influence of the distribution of the magnetic field, and the image of the change of the tension along with the position is drawn through the information transmitted by the second tension sensor 15 and received by software in the computer, so that the following conclusion can be obtained: when the current is positively connected, the tension force is found to be kept unchanged in the middle part, the fact that the magnetic field in the area is a uniform magnetic field is indirectly proved, meanwhile, when the current is reversely connected, the tension force is firstly reduced and increased, the middle magnetic field is zero, the fact that the magnetic field is changed in a gradient mode is proved, and the other areas are uneven magnetic fields is proved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a measuring device in (anti) helmholtz coil magnetic field, includes movement track base (1), coil base (2), helmholtz coil (3), support (4), lead screw (5), step motor (6), current-carrying square coil (7), lever (8), lever support (9), tension sensor (10), rope (11) and magnetic field sensor (12), its characterized in that: move track base (1) upper surface and coil base (2) fixed connection, coil base (2) upper surface evenly is equipped with two sets of helmholtz coils (3), be equipped with lead screw (5) in two sets of helmholtz coils (3), be equipped with magnetic field sensor (12) on lead screw (5), and the output shaft of lead screw (5) right-hand member and step motor (6), lead screw (5) left end is passed through the bearing and is connected with support (4), be equipped with current-carrying square coil (7) between two sets of helmholtz coils (3), current-carrying square coil (7) are connected with lever (8) right-hand member through rope (11), lever (8) left end is passed through rope (11) and is connected with force sensor (10), and lever (8) are connected with move track base (1) through lever support (9).
2. A device for measuring the magnetic field of an (anti-) helmholtz coil according to claim 1, wherein: the upper end surface of the lever bracket (9) is positioned at the central position of the lever (8), and the lever bracket (9) is positioned at the left side of the bracket (4).
3. A device for measuring the magnetic field of an (anti-) helmholtz coil according to claim 1, wherein: be equipped with ya keli drum (14) in two sets of helmholtz coils (3), be equipped with lead screw (5) in yakeli drum (14), lead screw (5) are connected with second (15) of force sensor through the connecting piece, and second (15) of force sensor is connected with metal globule (13) through rope (11), and metal globule (13) are located yakeli drum (14).
4. A device for measuring the magnetic field of an (anti-) helmholtz coil according to claim 3, wherein: the excircle diameter of the acrylic cylinder (14) is smaller than that of the Helmholtz coil (3), and the two ends of the acrylic cylinder (14) are connected with the coil base (2) through the supporting frames.
5. A device for measuring the magnetic field of an (anti-) helmholtz coil according to claim 1, wherein: the bottom edge of the current-carrying square coil (7) is positioned at the central position between the two groups of Helmholtz coils (3) and is vertical to the central axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121487598.3U CN215641768U (en) | 2021-07-01 | 2021-07-01 | Measuring device for magnetic field of (anti-) Helmholtz coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121487598.3U CN215641768U (en) | 2021-07-01 | 2021-07-01 | Measuring device for magnetic field of (anti-) Helmholtz coil |
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| CN215641768U true CN215641768U (en) | 2022-01-25 |
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| CN202121487598.3U Expired - Fee Related CN215641768U (en) | 2021-07-01 | 2021-07-01 | Measuring device for magnetic field of (anti-) Helmholtz coil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362419A (en) * | 2022-02-18 | 2022-04-15 | 河南科技大学 | Motor bearing measuring device and method under controllable magnetic field environment |
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2021
- 2021-07-01 CN CN202121487598.3U patent/CN215641768U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362419A (en) * | 2022-02-18 | 2022-04-15 | 河南科技大学 | Motor bearing measuring device and method under controllable magnetic field environment |
| CN114362419B (en) * | 2022-02-18 | 2023-08-25 | 河南科技大学 | Motor bearing measuring device and method under controllable magnetic field environment |
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Granted publication date: 20220125 |