CN204347100U - Magnetic field shielding device - Google Patents
Magnetic field shielding device Download PDFInfo
- Publication number
- CN204347100U CN204347100U CN201420791411.2U CN201420791411U CN204347100U CN 204347100 U CN204347100 U CN 204347100U CN 201420791411 U CN201420791411 U CN 201420791411U CN 204347100 U CN204347100 U CN 204347100U
- Authority
- CN
- China
- Prior art keywords
- main body
- magnetic field
- shielding device
- described main
- field shielding
- 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.)
- Active
Links
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The utility model discloses a kind of magnetic field shielding device, and it is Magnetic Sensor shielding external magnetic field in testing in the demarcation of Magnetic Sensor; Described magnetic field shielding device comprises material and is conductor and the main body with inner chamber, and described inner chamber is used for putting into described Magnetic Sensor; Described main body comprises the entrance communicated with described inner chamber, and described entrance has the lid can closed and open; Described main body is provided with through wires hole, and described through wires hole is used for through the cable be connected with described Magnetic Sensor.The utility model provides a kind of magnetic field shielding device can demarcate in test at Magnetic Sensor and shields external magnetic field.
Description
Technical field
The application relates to electromagnetic survey field, particularly relates to a kind of magnetic field shielding device.
Background technology
Magnetic Sensor is very important a kind of equipment in electromagnetic survey, and its function is induced field intensity, direction change in electromagnetic survey, and is converted into discernible electric signal, and then completes the collection of electromagnetic survey data data.The stability of the serviceability of Magnetic Sensor, directly can affect the precision of survey data, so Magnetic Sensor needs to detect accordingly Magnetic Sensor before putting into normal electromagnetic survey work.
At present, to Magnetic Sensor the most efficiently detection mode be test by carrying out demarcations to Magnetic Sensor, the result of demarcating test can judge that whether Magnetic Sensor work is normal and be used for obtaining each frequency response parameter of Magnetic Sensor on the one hand, such as externally adds the response amplitude etc. of standard Magnetic Field; Demarcate test result on the other hand and can also be used for the final data information process of electromagnetic survey, so the demarcation test result of Magnetic Sensor is very important.
But, because test site or power equipment around get more and more, the space magnetic field that power equipment is formed is more and more stronger for electromagnetic interference influence in Magnetic Sensor calibration process, and then the test result of Magnetic Sensor demarcation accurately cannot be obtained, cause and demarcate unsuccessfully, affect investigation and prospecting progress, and then need a kind of device that can shield external magnetic field in Magnetic Sensor demarcation test badly.
Utility model content
In view of the deficiencies in the prior art, the application provides a kind of magnetic field shielding device, shields external magnetic field can demarcate in test at Magnetic Sensor.
The application provides a kind of magnetic field shielding device, and it is Magnetic Sensor shielding external magnetic field in testing in the demarcation of Magnetic Sensor; Described magnetic field shielding device comprises material and is conductor and the main body with inner chamber, and described inner chamber is used for putting into described Magnetic Sensor; Described main body comprises the entrance communicated with described inner chamber, and described entrance has the lid can closed and open; Described main body is provided with through wires hole, and described through wires hole is used for through the cable be connected with described Magnetic Sensor.
Preferably, the material of described main body is permalloy.
Preferably, described through wires hole is offer a gap in the outer rim of described lid.
Preferably, described main body is the cylindrical shell that one end closes that one end is provided with described lid; Described magnetic field shielding device comprises the described main body that multiple external diameter reduces gradually, and multiple described main body is nested successively from large to small according to external diameter, and the inner chamber of the described main body of innermost layer is used for putting into described Magnetic Sensor.
Preferably, be filled with expanded material between adjacent described main body, between adjacent body, spacing distance is 2 centimetres to 3 centimetres.
Preferably, the quantity of described main body is three.
Preferably, the wall thickness of described main body is 1.8 millimeters to 2.2 millimeters; In three described main bodys, the external diameter of outermost described main body is 345 millimeters to 355 millimeters, and the external diameter of the described main body in middle layer is 320 millimeters to 330 millimeters, and the external diameter of the described main body of innermost layer is 290 millimeters to 300 millimeters.
Preferably, the described through wires hole of adjacent described main body staggers mutually.
Preferably, described magnetic field shielding device also comprises pedestal, and described pedestal can accept described main body, and described pedestal is provided with roller.
Preferably, the material of described pedestal is wooden.
By above description, can find out that the described magnetic field shielding device that the application provides provides an enclosure space for Magnetic Sensor carries out demarcation test, the exhausted major part of the lines of magnetic induction of external magnetic field is passed through in the wall along described main body, and the magnetic flux entering described inner chamber is few, and then formation magnetic shielding, the magnetic field shielding device using the application to provide makes the interference carrying out can not being subject to when demarcating test external magnetic field at described Magnetic Sensor, so can be demarcated in test at Magnetic Sensor shield external magnetic field.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the magnetic field shielding device structural representation that a kind of embodiment of the application provides;
Fig. 2 is the cover body structure schematic diagram that the application's embodiment provides;
Fig. 3 is the base construction cut-open view that the application's embodiment provides;
Magnetic Sensor is placed directly in the electromagnetic background field noise timing curve gathering acquisition in maintenance room by Fig. 4 in the application's embodiment;
Fig. 5 is that described Magnetic Sensor is placed on the electromagnetic background field noise timing curve gathering acquisition in magnetic field shielding device that the application's embodiment provides by same position in described maintenance room.
Embodiment
Technical scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should belong to the scope of the utility model protection.
Please refer to Fig. 1, the application provides a kind of magnetic field shielding device, and it is Magnetic Sensor shielding external magnetic field in testing in the demarcation of Magnetic Sensor; Described magnetic field shielding device comprises material and is conductor and the main body 1 with inner chamber 2, and described inner chamber 2 is for putting into described Magnetic Sensor; Described main body 1 comprises the entrance 3 communicated with described inner chamber 2, and described entrance 3 has the lid 4 can closed and open; Described main body 1 is provided with through wires hole 8, and described through wires hole 8 is for passing the cable be connected with described Magnetic Sensor.
During use, first the described lid 4 of above-mentioned magnetic field shielding device is opened, then Magnetic Sensor to be calibrated is put into described inner chamber 2 by described entrance 3, by described through wires hole 8, the cable connecting described Magnetic Sensor is drawn again, now described lid 4 is fastened, drawn cable and other equipment connections can be carried out demarcation and test.
By above description, can find out that the described magnetic field shielding device that present embodiment provides provides an enclosure space for Magnetic Sensor carries out demarcation test, the exhausted major part of the lines of magnetic induction of external magnetic field is passed through in the wall along described main body 1, and the magnetic flux entering described inner chamber 2 is few, and then formation magnetic shielding, the magnetic field shielding device using present embodiment to provide makes the interference carrying out can not being subject to when demarcating test external magnetic field at described Magnetic Sensor, so can be demarcated in test at Magnetic Sensor shield external magnetic field.
Simultaneously, demarcate calibration coil in test and be arranged in described Magnetic Sensor, therefore in demarcation test, calibration coil is arranged in described inner chamber 2 equally, and then to be formed in described main body 1 inner in the demarcation magnetic field to be formed by described calibration coil, can not shield by described main body 1, so described main body 1 can not produce any impact to demarcation signal, and then described magnetic field shielding device is while significantly reducing external magnetic field interference, any interference can not be produced to the demarcation of self, make the demarcation of Magnetic Sensor more accurate, test result is more objective, and be not limited to the situation realizing place, there is stronger adaptability.
Described main body 1 entirety can close for one end the cylinder that one end is provided with described lid 4.Described main body 1 comprises described inner chamber 2 and described entrance 3.Described inner chamber 2 entirety also can be cylindrical, to adapt to the shape of described Magnetic Sensor.Described Magnetic Sensor can put into described inner chamber 2 by described entrance 3, and described entrance 3 is provided with the described lid 4 that can be closed.Close described entrance 3 by described lid 4, the inside of described main body 1 forms the receiving space of a relative closure, and then forms shielding space.
The material of described main body 1 is conductor, and owing to having described inner chamber 2 and described lid 4, described main body 1 also can regard as a hollow conductor.Because conductor can be divided into multiple, and each conductor all has different magnetic permeabilities (magnetic permeability).Due to the difference of above-mentioned magnetic permeability, the shield effectiveness of the external magnetic field of the described main body 1 using different materials to make is not identical yet.Consider Magnetic Sensor demarcation test in need shield be mainly downfield ripple, through the experiment that inventor is a large amount of, find that at main body 1 material be permalloy, the shield effectiveness for external magnetic field is best.Permalloy also can be called iron-nickel alloy, and the scope of its nickel content is between 35% to 90%.The maximum feature of permalloy has very high low-intensity magnetic field magnetoconductivity.The saturation induction density of permalloy is generally between 0.6--1.0T.
As shown in Figure 2, certainly, consider and described Magnetic Sensor needs to be connected by cable, so described main body 1 offers described through wires hole 8 with equipment such as demarcation, monitorings.Consider the perforated area size of described through wires hole 8 have influence on external magnetic field by this through wires hole 8 enter described inner chamber 2 number, and then interference Magnetic Sensor demarcation test, meanwhile, consider that described lid 4 is located at described entrance 3 place, it can be closed and open.Described through wires hole 8 can for offer a gap in the outer rim of described lid 4.Described lid 4 covers described through wires hole 8 and the inner edge of described entrance 3 when described entrance 3 and forms the passing hole of cable.The material of described lid 4 can adopt permalloy equally.Further, described lid 4 is by being set in described entrance 3 place of described main body 1 end, simultaneously, for making the closure effect of described lid 4 better, the overlapping area at described lid 4 and described entrance 3 place can be increased, present embodiment can adopt the length making the cover rim of described lid 4 (with described entrance 3 place intersection) to be 20 millimeter, and the diameter of described through wires hole 8 can be 25 millimeter.
The joint of the cable of the described Magnetic Sensor of existing connection is thicker master-slave socket design, the external diameter of joint is generally greater than the external diameter of cable, and use above-mentioned lid 4 and coordinate described through wires hole 8, the internal diameter of described through wires hole 8 can not limit by the size of described cable connector, can the external diameter of interlude of direct adaptive described cable.
In a preferred embodiment, consider that single main body 1 is limited for the shield effectiveness of external magnetic field, described magnetic field shielding device comprises the described main body 1 that multiple external diameter reduces gradually, multiple described main body 1 is nested successively from large to small according to external diameter, and the inner chamber 2 of the described main body 1 of innermost layer is for putting into described Magnetic Sensor.Described in each, main body 1 all forms an enclosure space, carries out a magnetic shielding for external magnetic field, and be on the basis of permalloy at described main body 1 material, external magnetic field can farthest shield by the magnetic field shielding device that this embodiment provides.
Due to may gap be there is between described main body 1, and use too much described main body 1 that whole described magnetic field shielding device weight may be caused excessive, so, can be filled with expanded material 5 between adjacent described main body 1, and to arrange spacing distance between adjacent body 1 be 2 centimetres to 3 centimetres and then facilitate the filling of described expanded material 5 and the insulativity increased between adjacent body 1.Described expanded material 5 can select polyurethane foam material 5, described expanded material 5 can alleviate the weight of whole described magnetic field shielding device, also the physical strength of whole device is strengthened, the physical construction of described magnetic field shielding device can be made not yielding so arranged by this kind, shock resistance and resisting temperature deformation performance all have higher ability.
In a specific embodiment, for Fig. 1, the quantity of described main body 1 can be three, is filled with described expanded material 5 between adjacent described main body 1.The material of described main body 1 is described permalloy.Further, the wall thickness of described main body 1 can be 1.8 millimeters to 2.2 millimeters.Three described main bodys 1 form nesting type structure, comprise outermost layer, middle layer and innermost layer, are similar to " cover baby " structure.In these three layers of nesting type structures, the external diameter of outermost described main body 1 can be 345 millimeters to 355 millimeters, and the external diameter of the described main body 1 in middle layer can be 320 millimeters to 330 millimeters, and the external diameter of the described main body 1 of innermost layer is 290 millimeters to 300 millimeters.
In this embodiment, consider that each independent main body 1 all has described lid 4, and lid 4 is equipped with described through wires hole 8, for avoiding external magnetic field directly to enter the described main body 1 of innermost layer by through wires hole 8, the described through wires hole 8 of adjacent described main body 1 can stagger mutually.Preferably, the described through wires hole 8 in adjacent described main body 1 and can be 90 degree of angles between the line between the center of circle, and then farthest avoid external magnetic field to enter the described main body 1 of innermost layer by described through wires hole 8.
The described magnetic field shielding device provided with the present embodiment carries out demarcation test in certain maintenance workshop, room, and these maintenance indoor have the conventional consumers such as daylight lamp, notebook computer, electric soldering iron.Under the state of consumer even running in holding chamber, when electromagnetic interference environment is basicly stable in holding chamber as far as possible, adopt same magnetic sensor, identical acquisition station carries out the noise gathering test of electromagnetic background field.Carry out two kinds for same described Magnetic Sensor and demarcate test: one is placed directly in by described Magnetic Sensor in maintenance room to carry out collection electromagnetic background field noise timing curve; Another kind is that described Magnetic Sensor is placed in magnetic field shielding device that the present embodiment provides and gathers electromagnetic background field noise timing curve by same position in described maintenance room.Collection result as shown in Figures 4 and 5, Fig. 4 is that described Magnetic Sensor is placed directly in the electromagnetic background field noise timing curve that collects in maintenance room, and Fig. 5 is that described Magnetic Sensor is placed on the electromagnetic background field noise timing curve collected in magnetic field shielding device that the present embodiment provides by same position in described maintenance room.Comparison diagram 4 and Fig. 5 can find out, when in two, test result ordinate is in the drawings 5e+05, the magnetic field shielding device adopting the present embodiment to provide significantly can shield the interference of external magnetic field, calculate the data analysis that two kinds of situations collect, the magnetic field shielding device using the present embodiment to provide can shield the external magnetic field interference of about 99%.
Please refer to Fig. 3, consider that magnetic field shielding device that present embodiment provides needs often to carry out shift position, and described main body 1 when using permalloy its weight larger, site operation personnel directly carries out resettlement can be more difficult, consider based on this kind, described magnetic field shielding device can also comprise pedestal 6, and described pedestal 6 can accept described main body 1, and described pedestal 6 is provided with roller 7.Figure 3 shows that example, described pedestal 6 offers and accepts groove 9, described undertaking groove 9 can adapt to the shape of described main body 1 outer wall.Such as, when described main body 1 is cylindrical shape, the section shape of described undertaking groove 9 can be semicircle.Meanwhile, the inwall of described undertaking groove 9 needs to fit with the outer wall of described main body 1, deposits described main body 1 in case can not rock on described pedestal 6 at described undertaking groove 9.The ground of described pedestal 6 can be provided with described roller 7, and the number of described roller 7 can be three or four.Described roller 7 can adopt universal wheel and directional wheel to install to the mode combined.Certainly, use described universal wheel (movable castor) that convenient the moving to any direction of whole described magnetic field shielding device can be made.The material of described pedestal 6 can be wooden, magnetic material can be avoided like this to disturb for the secondary of described main body 1, and can not increase considerably the weight of whole magnetic field shielding device.
More than show and describe ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (10)
1. a magnetic field shielding device, it is Magnetic Sensor shielding external magnetic field in testing in the demarcation of Magnetic Sensor; It is characterized in that: described magnetic field shielding device comprises material and is conductor and the main body with inner chamber, and described inner chamber is used for putting into described Magnetic Sensor; Described main body comprises the entrance communicated with described inner chamber, and described entrance has the lid can closed and open; Described main body is provided with through wires hole, and described through wires hole is used for through the cable be connected with described Magnetic Sensor.
2. magnetic field shielding device as claimed in claim 1, is characterized in that: the material of described main body is permalloy.
3. magnetic field shielding device as claimed in claim 1, is characterized in that: described through wires hole is offer a gap in the outer rim of described lid.
4. magnetic field shielding device as claimed in claim 1, is characterized in that: described main body is the cylindrical shell that one end closes that one end is provided with described lid; Described magnetic field shielding device comprises the described main body that multiple external diameter reduces gradually, and multiple described main body is nested successively from large to small according to external diameter, and the inner chamber of the described main body of innermost layer is used for putting into described Magnetic Sensor.
5. magnetic field shielding device as claimed in claim 4, it is characterized in that: be filled with expanded material between adjacent described main body, between adjacent body, spacing distance is 2 centimetres to 3 centimetres.
6. magnetic field shielding device as claimed in claim 5, is characterized in that: the quantity of described main body is three.
7. magnetic field shielding device as claimed in claim 6, is characterized in that: the wall thickness of described main body is 1.8 millimeters to 2.2 millimeters; In three described main bodys, the external diameter of outermost described main body is 345 millimeters to 355 millimeters, and the external diameter of the described main body in middle layer is 320 millimeters to 330 millimeters, and the external diameter of the described main body of innermost layer is 290 millimeters to 300 millimeters.
8. magnetic field shielding device as claimed in claim 7, is characterized in that: the described through wires hole of adjacent described main body staggers mutually.
9. the magnetic field shielding device as described in claim 1 to 8 any one, is characterized in that: described magnetic field shielding device also comprises pedestal, and described pedestal can accept described main body, and described pedestal is provided with roller.
10. magnetic field shielding device as claimed in claim 9, is characterized in that: the material of described pedestal is wooden.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420791411.2U CN204347100U (en) | 2014-12-12 | 2014-12-12 | Magnetic field shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420791411.2U CN204347100U (en) | 2014-12-12 | 2014-12-12 | Magnetic field shielding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204347100U true CN204347100U (en) | 2015-05-20 |
Family
ID=53230361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420791411.2U Active CN204347100U (en) | 2014-12-12 | 2014-12-12 | Magnetic field shielding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204347100U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106850121A (en) * | 2016-11-10 | 2017-06-13 | 浙江商业职业技术学院 | The alarm interference unit of long range magnetic communication |
| CN107223012A (en) * | 2017-07-27 | 2017-09-29 | 信利光电股份有限公司 | A kind of dual camera module and electronic equipment |
| CN114562133A (en) * | 2022-02-24 | 2022-05-31 | 北京航空航天大学 | Reconfigurable magnetic shielding room with non-magnetic track |
-
2014
- 2014-12-12 CN CN201420791411.2U patent/CN204347100U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106850121A (en) * | 2016-11-10 | 2017-06-13 | 浙江商业职业技术学院 | The alarm interference unit of long range magnetic communication |
| CN106850121B (en) * | 2016-11-10 | 2019-08-16 | 浙江商业职业技术学院 | The alarm interference unit of long range magnetic communication |
| CN107223012A (en) * | 2017-07-27 | 2017-09-29 | 信利光电股份有限公司 | A kind of dual camera module and electronic equipment |
| CN114562133A (en) * | 2022-02-24 | 2022-05-31 | 北京航空航天大学 | Reconfigurable magnetic shielding room with non-magnetic track |
| CN114562133B (en) * | 2022-02-24 | 2023-02-07 | 北京航空航天大学 | Reconfigurable magnetic shielding room with non-magnetic track |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110187395B (en) | Zero-magnetic-flux shallow transient electromagnetic test coil and test method thereof | |
| CN204347100U (en) | Magnetic field shielding device | |
| CN206564328U (en) | Transient electromagnetic exploration integrated dual-mode antenna rod and measurement apparatus | |
| CN103499839B (en) | Primary field interference is from the low noise Transient electromagnetic measure device disappeared | |
| CN103499841B (en) | Hole, lane transient electromagnetic device and measuring method | |
| CN104251982A (en) | Systems and methods for calibrating phase and sensitivity of current transducers | |
| CN107272074A (en) | A kind of apparatus and method for realizing Mine transient electromagnetic focusing-detection | |
| CN104267241A (en) | High-frequency current partial discharge signal acquisition sensor | |
| CN109209363A (en) | Cross casing stratum differential resistance rate well-logging probe structure | |
| CN104391169A (en) | Double-wire Hall current sensor | |
| CN106124948A (en) | Monitoring device and method are put in a kind of built-in office | |
| CN102645641A (en) | Fluxgate sensor with three components on same point | |
| CN104977441A (en) | Systems and methods for reducing attenuation in current transducers | |
| CN104199085A (en) | Low-frequency detector | |
| CN205691672U (en) | Three-dimensional omnidirectional's emf probe and ipping coil primary means | |
| CN207586301U (en) | Half opening iron core closed-loop current sensors | |
| CN104471355B (en) | Chip type magnetic sensor | |
| CN203688500U (en) | In-situ eddy current detection sensor for cracks of blade air film hole | |
| CN105242222A (en) | Method for measuring magnetic field radiation and magnetic field probe | |
| CN209264811U (en) | Double-iron core closed-loop current sensors | |
| CN206942754U (en) | NMR while drilling instrument magnet | |
| CN107035367A (en) | NMR while drilling instrument magnet | |
| CN112392462A (en) | Receiving coil array for interlayer interface measurement and measurement system | |
| CN204287389U (en) | High-frequency current local discharge signal pick-up transducers | |
| CN103132987B (en) | A kind of three-component inductive coil series probe string-passing structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |