CN206515456U - A kind of calibrating installation of magnetic field intensity tester - Google Patents
A kind of calibrating installation of magnetic field intensity tester Download PDFInfo
- Publication number
- CN206515456U CN206515456U CN201720051837.8U CN201720051837U CN206515456U CN 206515456 U CN206515456 U CN 206515456U CN 201720051837 U CN201720051837 U CN 201720051837U CN 206515456 U CN206515456 U CN 206515456U
- Authority
- CN
- China
- Prior art keywords
- bnc
- magnetic field
- framework ring
- coil framework
- dividing plates
- 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.)
- Expired - Fee Related
Links
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The utility model provides a kind of calibrating installation of magnetic field intensity tester, including：Helmholtz coil device, outer posts, BNC dividing plates socket and wire, Helmholtz coil device include：On coaxial placement and the coil framework ring and lower coil framework ring being parallel to each other, BNC dividing plate sockets support column mounted externally, wire is drawn from BNC dividing plates socket, leads back BNC dividing plate sockets after coil framework ring and the circle of lower coil framework ring winding five successively.The working frequency range of low frequency magnetic field ratemeter is not only covered, the frequency bandwidth requirements of calibration low frequency magnetic field ratemeter are met, and enough uniform domains are provided, the overall performance of calibrating installation is lifted；Mechanical dimension's precision is high；It is easy to connect；It is anti-interference；Simple for structure, light weight is easy to operate.
Description
Technical field
The utility model belongs to instrument and meter collimation technique field, more particularly to a kind of calibration cartridge of magnetic field intensity tester
Put.
Background technology
In order to protect the harm that human body is not radiated by low frequency electromagnetic field, it is necessary to be surveyed using accurate low frequency magnetic field ratemeter
The low frequency magnetic field radiation intensity in work or living environment is measured, therefore, accurate low frequency magnetic field ratemeter is widely used in
Health department unit and environmental evaluation mechanism, there is provided Monitoring Data, are to ensure that health, the important instrument of personal safety are set
It is standby.In order to ensure magnetic field intensity measuring instrument can obtain accurate measurement result, it need to be calibrated, permit the control of its value
Perhaps in error range.
The calibration system of magnetic field intensity tester mainly includes：Low-frequency current source, Helmholtz coil, probe positioning dress
Put, the low-frequency current injection Helmholtz coil that low-frequency current source is produced, probe locating device pops one's head in magnetic field intensity measuring instrument
It is fixed on the centre of Helmholtz coil.But calibration system is only used for producing static magnetic field or industrial frequency AC magnetic field at present,
Upper frequency limit is generally hundreds of hertz, it is impossible to meet the frequency bandwidth requirements of calibration low frequency magnetic field ratemeter.In addition,
The field uniformity of current less calibration system immediate vicinity is not enough, and larger calibration system is again complicated, not easy to operate,
It can not put into daily life and be used.
The content of the invention
In order to solve the above technical problems, the utility model provides a kind of calibrating installation of magnetic field intensity tester.In order to right
Some aspects of the embodiment of disclosure have a basic understanding, shown below is simple summary.The summarized section is not general
It is general to comment, nor to determine key/critical component or describe the protection domain of these embodiments.Its sole purpose is to use
Some concepts are presented in simple form, in this, as the preamble of following detailed description.
The utility model is adopted the following technical scheme that：
There is provided a kind of calibrating installation of magnetic field intensity tester in some optional embodiments, including：Helmholtz's line
Coil apparatus, outer posts, BNC dividing plates socket and wire；The Helmholtz coil device includes：Coil framework ring and under
Coil rack ring, the coil framework ring is coaxial with the lower coil framework ring to be placed and is parallel to each other；The BNC dividing plates are inserted
Seat is arranged in the outer posts, and the upper end of the outer posts is connected by upper extension board and the coil framework ring
Connect, the lower end of the outer posts is connected by lower extension board with the lower coil framework ring；The wire from the BNC every
Plate socket is drawn, and leads back the BNC dividing plates socket after the coil framework ring and the circle of lower coil framework ring winding five successively.
In some optional embodiments, a kind of calibrating installation of described magnetic field intensity tester, in addition to：For producing
The generating means of raw low-frequency current, the generating means is connected with the BNC dividing plates socket, and the generating means will by wire
Low-frequency current injects the Helmholtz coil device.
In some optional embodiments, the outside of the coil framework ring and the lower coil framework ring, which is opened up, leads
Wire casing, the upper surface of the upper extension board and lower surface open up metallic channel, and the upper surface of the lower extension board and lower surface are equal
Metallic channel is opened up, the outer posts open up metallic channel in the one side for installing the BNC dividing plates socket.
In some optional embodiments, the top of the wire is connected with the inner wire of the BNC dividing plates socket, and institute
State wire to draw from the BNC dividing plates socket, sequentially pass through metallic channel, the wire of upper extension board upper surface of outer posts
Groove, the metallic channel of coil framework ring, the metallic channel of upper extension board lower surface, the metallic channel of lower extension board upper surface, lower coil
Lead back the BNC dividing plates socket after the metallic channel of framework ring, the metallic channel of lower extension board lower surface, and the end of the wire with
The outer conductor connection of the BNC dividing plates socket.
In some optional embodiments, the Helmholtz coil device also includes：Four body supports posts, the master
Body support column one end is connected with the coil framework ring, and the other end is connected with the lower coil framework ring.
In some optional embodiments, the material of the Helmholtz coil device is nylon or acrylic.
In some optional embodiments, the generating means includes：Voltage source and trsanscondutance amplifier.
In some optional embodiments, the generating means includes：Voltage source, power amplifier, current divider and high-precision
Spend low-frequency voltage table.
The beneficial effect that the utility model is brought：The working frequency range of low frequency magnetic field ratemeter is not only covered, is met
The frequency bandwidth requirements of low frequency magnetic field ratemeter are calibrated, and enough uniform domains are provided, the entirety of calibrating installation is lifted
Performance；Mechanical dimension's precision is high；It is easy to connect；It is anti-interference；Simple for structure, light weight is easy to operate.
For above-mentioned and related purpose, one or more embodiments include will be explained in below and in claim
In the feature that particularly points out.Following explanation and accompanying drawing describe some illustrative aspects in detail, and its indicate be only
Some modes in the utilizable various modes of principle of each embodiment.Other benefits and novel features will be under
The detailed description in face is considered in conjunction with the accompanying and becomes obvious, the disclosed embodiments be will include all these aspects and they
Be equal.
Brief description of the drawings
Fig. 1 is the schematic diagram of Helmholtz coil device；
Fig. 2 is a kind of structural representation of the calibrating installation of magnetic field intensity tester of the utility model.
Embodiment
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Put into practice them.Other embodiments can include structure, logic, electric, process and other changes.Embodiment
Only represent possible change.Unless explicitly requested, otherwise single components and functionality is optional, and the order operated can be with
Change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair
The scope of bright embodiment includes the gamut of claims, and claims is all obtainable equivalent
Thing.
As shown in Fig. 1 to 2, in some illustrative embodiments there is provided a kind of calibrating installation of magnetic field intensity tester,
Low-frequency current can be converted into low frequency magnetic field by the calibrating installation, for calibrating accurate low frequency magnetic field ratemeter, including：The last of the twelve Earthly Branches
Mu Huozi coil devices, outer posts 1, BNC dividing plates socket 2, wire, upper extension board 3, lower extension board 4 and low for producing
The generating means 5 of frequency electric current, wherein, Helmholtz coil device includes：Coil framework ring 6, lower coil framework ring 7 and main body
Support column 8.
By low-frequency current source be generating means produce electric current inject Helmholtz coil device, Helmholtz coil be by
Parallel coaxial place of a pair of coils is formed, and two coil radius are respectively r1 and r2, and the number of turn is respectively N1And N2, coil-span is d,
R1=r2=d should be met as far as possible, it is assumed that the size of current of feed in winding is I, then can be calculated by following formula in coil device
Heart O and circle along the shaft are to the magnetic field intensity H that is, produced by x directionsC：
Generating means 5 produces the low-frequency current with certain bandwidth, and has preferable inductive load driving force, occurs
The output interface of device 5 is 4mm terminals or coaxial connector, and to improve antijamming capability, generating means 5 is inserted with BNC dividing plates
Seat 2 is connected, and the low-frequency current itself produced is injected Helmholtz coil device by generating means 5 by wire.Generating means 5
The frequency coverage of the low-frequency current of generation is 30Hz~100kHz, and current maxima is not less than 3A.
In some illustrative embodiments, generating means 5 includes：Voltage source and trsanscondutance amplifier, voltage output terminal
The input of trsanscondutance amplifier is connected to, low-frequency current is produced in the output end of trsanscondutance amplifier.In some illustrative implementations
In example, because the combination cost using voltage source and trsanscondutance amplifier is higher, therefore, generating means 5 includes：Voltage source, power
Amplifier, current divider and high precision low frequency voltmeter, voltage output terminal are connected to the input of power amplifier, power amplification
The output end of device is connected to the voltage end of current divider, the monitoring side connection high precision low frequency voltmeter of current divider, the electricity of current divider
End output low frequency electric current, high-accuracy low-frequency voltage table are flowed, measurement range is 1mV~20V, i.e. 30Hz~1MHz, and measurement accuracy
Better than ± 0.3%, cost can be significantly reduced using combinations thereof.
Coil rack ring is the thin annulus that outside is slotted, and is divided into upper and lower two pieces, respectively coil framework ring 6 with it is offline
Ring framework ring 7, coil framework ring 6 is coaxial with lower coil framework ring 7 to be placed and is parallel to each other, and the external diameter of two rings is 1000mm,
Internal diameter is 900mm, and thickness is 10mm.Every 45 ° of drill two holes on ring, to mounting body support column 8, body supports post 8
Quantity is four, for supporting and fixed coil framework ring 6 and lower coil framework ring 7, four one end of body supports post 8 with it is upper
Coil rack ring 6 is connected, and the other end is connected with lower coil framework ring 7.One group of hole, hole are bored in the top of body supports post 8 and bottom
Footpath and spacing are corresponding with the hole on coil framework ring 6 and lower coil framework ring 7, and are carried out tightly using standard nylon bolt
Gu, so that two rings be fixed.
On the support column 1 mounted externally of BNC dividing plates socket 2, the upper ends of outer posts 1 is by upper extension board 3 with reaching the standard grade
Ring framework ring 6 is connected, and the lower end of outer posts 1 is connected by lower extension board 4 with lower coil framework ring 7.Wire is from BNC dividing plates
Socket 2 is drawn, and leads back BNC dividing plates socket 2 after coil framework ring 6 and the circle of the winding of lower coil framework ring 7 five successively.
For ease of cabling, the outside of coil framework ring 6 and lower coil framework ring 7 opens up metallic channel, upper extension board 3
Upper surface and lower surface open up metallic channel, and the upper surface of lower extension board 4 and lower surface open up metallic channel, outer posts 1
Metallic channel is opened up in the one side for installing BNC dividing plate sockets, each metallic channel is connected.
The length of wire is not less than 40m, and the top of wire is connected with the inner wire of the BNC dividing plates socket, from BNC every
Plate socket 2 is drawn, and the metallic channel of the upper upper surface of extension board 3 is gone to upwards then along the metallic channel of outer posts 1, and along
In the metallic channel of the supreme coil rack ring 6 of the groove cabling.Wire in the metallic channel of coil framework ring 6 after the circle of coiling 5, along
The metallic channel of the upper lower surface of extension board 3 is drawn, further along outer posts 1 metallic channel cabling to the lower upper surface of extension board 4
Metallic channel, and along the groove cabling to the metallic channel of lower coil framework ring 7 in.Wire is in the metallic channel of lower coil framework ring 7
After the circle of coiling 5, drawn along the metallic channel of the lower lower surface of extension board 3 and walk back the metallic channel of outer posts 1, finally led back
In BNC dividing plates socket 2, and the end of wire is connected with the outer conductor of the BNC dividing plates socket.Due to using low inductance leads
Low number of turn coiling, so calibrating installation bandwidth of the present utility model is high, the upper limit uses large-diameter coil bone up to 100kHz
Frame ring and extension board, easy to connect, strong antijamming capability are not only attractive in appearance, firm, light using the structure design of optimization, and
Make the uniform domain sizes of central magnetic field big, lift the performance of calibrating installation.
In the selection of material, domestic common framework material is solid wood, duroplasts or pcb board at present, is said at some
In the embodiment of bright property, the material of the Helmholtz coil device is nylon or acrylic, with attractive in appearance, lightweight, it is firm plus
The high advantage of work precision, the dimensional accuracy of machining is high, better than ± 0.1%.
Above-described embodiment is the utility model preferably embodiment, but embodiment of the present utility model is not by above-mentioned
The limitation of embodiment, other are any without departing from the change made under Spirit Essence of the present utility model and principle, and modification is substituted,
Combination, simplifies, should be equivalent substitute mode, should all be included in protection domain of the present utility model.
Claims (8)
1. a kind of calibrating installation of magnetic field intensity tester, it is characterised in that including：Helmholtz coil device, external support
Post, BNC dividing plates socket and wire；The Helmholtz coil device includes：Coil framework ring and lower coil framework ring, it is described
Coil framework ring is coaxial with the lower coil framework ring to be placed and is parallel to each other；The BNC dividing plates socket is arranged on described outer
On portion's support column, the upper end of the outer posts is connected by upper extension board with the coil framework ring, the outside branch
The lower end of dagger is connected by lower extension board with the lower coil framework ring；The wire is drawn from the BNC dividing plates socket, according to
It is secondary to lead back the BNC dividing plates socket after the coil framework ring and the circle of lower coil framework ring winding five.
2. the calibrating installation of a kind of magnetic field intensity tester according to claim 1, it is characterised in that also include：For
The generating means of low-frequency current is produced, the generating means is connected with the BNC dividing plates socket, and the generating means passes through wire
Low-frequency current is injected into the Helmholtz coil device.
3. a kind of calibrating installation of magnetic field intensity tester according to claim 2, it is characterised in that the coil bone
The outside of frame ring and the lower coil framework ring opens up metallic channel, and the upper surface of the upper extension board and lower surface are opened up and led
Wire casing, the upper surface of the lower extension board and lower surface open up metallic channel, and the outer posts are installing the BNC dividing plates
The one side of socket opens up metallic channel.
4. a kind of calibrating installation of magnetic field intensity tester according to claim 3, it is characterised in that the beginning of the wire
End is connected with the inner wire of the BNC dividing plates socket, and the wire is drawn from the BNC dividing plates socket, sequentially passes through outside
The metallic channel of support column, the metallic channel of upper extension board upper surface, the metallic channel of coil framework ring, upper extension board lower surface are led
Led back after wire casing, the metallic channel of lower extension board upper surface, the metallic channel of lower coil framework ring, the metallic channel of lower extension board lower surface
The BNC dividing plates socket, and the end of the wire is connected with the outer conductor of the BNC dividing plates socket.
5. a kind of calibrating installation of magnetic field intensity tester according to claim 4, it is characterised in that the Helmholtz
Coil device also includes：Four body supports posts, described body supports post one end is connected with the coil framework ring, the other end
It is connected with the lower coil framework ring.
6. a kind of calibrating installation of magnetic field intensity tester according to claim 5, it is characterised in that the Helmholtz
The material of coil device is nylon or acrylic.
7. a kind of calibrating installation of magnetic field intensity tester according to claim 6, it is characterised in that the generating means
Including：Voltage source and trsanscondutance amplifier.
8. a kind of calibrating installation of magnetic field intensity tester according to claim 6, it is characterised in that the generating means
Including：Voltage source, power amplifier, current divider and high precision low frequency voltmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720051837.8U CN206515456U (en) | 2017-01-17 | 2017-01-17 | A kind of calibrating installation of magnetic field intensity tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720051837.8U CN206515456U (en) | 2017-01-17 | 2017-01-17 | A kind of calibrating installation of magnetic field intensity tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206515456U true CN206515456U (en) | 2017-09-22 |
Family
ID=59865547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720051837.8U Expired - Fee Related CN206515456U (en) | 2017-01-17 | 2017-01-17 | A kind of calibrating installation of magnetic field intensity tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206515456U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267157A (en) * | 2018-03-21 | 2018-07-10 | 歌尔股份有限公司 | The calibration method and calibrating installation of geomagnetic sensor |
| CN109541514A (en) * | 2018-12-28 | 2019-03-29 | 中国计量科学研究院 | A kind of magnetic moment measures the calibration control device and calibrating installation of small coil turn area |
| CN109839610A (en) * | 2018-12-27 | 2019-06-04 | 中国计量科学研究院 | Helmholtz coil constant exchange calibration system and method based on orthogonality principle |
| CN112098913A (en) * | 2020-09-16 | 2020-12-18 | 江苏方天电力技术有限公司 | Polar plate coil assembly for electromagnetic field calibration and electromagnetic field calibration device |
-
2017
- 2017-01-17 CN CN201720051837.8U patent/CN206515456U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267157A (en) * | 2018-03-21 | 2018-07-10 | 歌尔股份有限公司 | The calibration method and calibrating installation of geomagnetic sensor |
| CN109839610A (en) * | 2018-12-27 | 2019-06-04 | 中国计量科学研究院 | Helmholtz coil constant exchange calibration system and method based on orthogonality principle |
| CN109839610B (en) * | 2018-12-27 | 2021-02-12 | 中国计量科学研究院 | Helmholtz coil constant alternating current calibration system and method based on orthogonality principle |
| CN109541514A (en) * | 2018-12-28 | 2019-03-29 | 中国计量科学研究院 | A kind of magnetic moment measures the calibration control device and calibrating installation of small coil turn area |
| CN109541514B (en) * | 2018-12-28 | 2024-02-02 | 中国计量科学研究院 | Calibration control device and calibration device for small coil turn area for magnetic moment measurement |
| CN112098913A (en) * | 2020-09-16 | 2020-12-18 | 江苏方天电力技术有限公司 | Polar plate coil assembly for electromagnetic field calibration and electromagnetic field calibration device |
| CN112098913B (en) * | 2020-09-16 | 2023-09-22 | 江苏方天电力技术有限公司 | Polar plate coil assembly for electromagnetic field calibration and electromagnetic field on-site calibration device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206515456U (en) | A kind of calibrating installation of magnetic field intensity tester | |
| CN204536523U (en) | A kind of based on computer-controlled teslameter measuring system | |
| CN101422365B (en) | Equalizing pulse external magnetic field adjustment device and method in high-temperature SQUID application | |
| CN203275629U (en) | Power frequency magnetic field probe calibration tester | |
| CN106772180B (en) | A kind of optical pumped magnetometer gradient tolerance measuring device | |
| CN103575295B (en) | A kind of inertial element magnetic-field sensitivity measuring system | |
| CN204903750U (en) | Intelligent ammeter detects with outside stationary magnetic field generating device | |
| CN202502239U (en) | Calibration device for synthetic field strength meter | |
| CN203799001U (en) | Dual uniform zone type magnetic field gradient magnetometer calibration device | |
| CN203204135U (en) | U type single magnetic core magnetic flux gate probe | |
| CN216562198U (en) | Hall effect test application experiment instrument | |
| CN102645642B (en) | Temperature property testing device of amorphous metal fibers | |
| CN211603531U (en) | High-precision sweep frequency type Rogowski coil mutual inductance calibration system | |
| CN202372613U (en) | Device capable of testing Hall device at wafer level | |
| CN105203975B (en) | A kind of pulse doublet magnetic axis measuring method | |
| CN207502706U (en) | The calibrating installation of cyclotron geomagnetic survey system is realized based on electromagnetic induction | |
| RU2718641C1 (en) | Method and device for permanent magnets identification by volume magnetization | |
| CN210181121U (en) | Isolated current sensor based on fluxgate sensor chip | |
| CN203133259U (en) | System for measuring coercivity magnitude of magnetic material | |
| Zhao et al. | Method of standard field for LF magnetic field meter calibration | |
| Zhang et al. | A new method for measuring the level dependence of ac shunts | |
| He et al. | A novel sensor system to detect cerebral hemorrhage in rabbits through MIPS | |
| CN204903742U (en) | Iron core magnetic property measuring device | |
| CN220455506U (en) | Three-dimensional Helmholtz electromagnetic coil | |
| Hall et al. | Magnetic environment and magnetic field standards at NPL for the calibration of low noise magnetometers and gradiometers for cleanliness studies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170922 Termination date: 20200117 |