CN203480007U - Waveguide coupling magnetoelectric device - Google Patents
Waveguide coupling magnetoelectric device Download PDFInfo
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- CN203480007U CN203480007U CN201320619117.9U CN201320619117U CN203480007U CN 203480007 U CN203480007 U CN 203480007U CN 201320619117 U CN201320619117 U CN 201320619117U CN 203480007 U CN203480007 U CN 203480007U
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- waveguide
- soft magnetic
- magnetic ferrite
- electret film
- ferrite
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Abstract
The utility model provides a waveguide coupling magnetoelectric device constituted by a magnetic steel (1), a soft magnetic ferrite (2), an organic waveguide (3), and an electret film (4), which are tightly combined together, and can be used to focus and transmit the sound field by the organic waveguide. The device adopts the self-generating technology, and is advantageous in that the costs are low, the structure is concise, the sensitivity to the magnetic field is higher, and the magnetic field frequency response range can be greatly widened.
Description
Technical field
The utility model utilizes organic waveguide to transmit sound field, and soft magnetic ferrite and electret film are combined and make magnetoelectricity device.When being subject to extraneous low-intensity magnetic field perturbation, the vibration of soft magnetic ferrite generation respective frequencies, vibration sound field is delivered to electret film by organic waveguide, has corresponding voltage to produce, and can realize the object to weak magnetic measurement.The utility model belongs to magneto-electronics technical field.
Background technology
Magnetoelectric effect is that material produces electropolarized phenomenon under the effect in magnetic field, and its corresponding material has broad application prospects in sensor field, can be used for switching energy, and transducing signal detects magnetic field etc.Magnetoelectricity laminate and Hall element etc. belong to this row, and wherein magnetoelectricity laminate is to be made by laminated by rare earth giant magnetostrictive material and piezoelectric ceramics.
In several materials that can measure magnetic field, magnetoelectricity laminate not only cost is low, and size is little, and much higher to the susceptibility in magnetic field, is more preferably selecting of magneto-dependent sensor.In addition, as sensor, need to consume electric energy different from Hall element or giant magnetoresistance, and magnetoelectricity laminate is the sensor of self-power generation type, do not need electric power input and directly can produce electricity output in sensing process.But magnetoelectricity laminate carries out stress transmission by interface, and deformation is inhomogeneous, and coupling state is undesirable, and owing to adopting all larger piezoelectric ceramics of thickness and elastic modulus, little to the frequency response range in magnetic field.
Utility model content
The technical matters solving:
The utility model proposes the mode that a kind of waveguide-coupled forms magnetoelectricity device, by organic waveguide, focus on and transmit sound field, can form self-power generation type magnetic field sensor.It not only has advantages of that magnetoelectricity laminate cost is low and simple for structure, and higher to the susceptibility in magnetic field, and the frequency response range in magnetic field is widened greatly.This magnetoelectricity device is practical, can be used for the weak magnetic measurement of wide frequency ranges.
The technical scheme of taking for technical solution problem:
First magnet steel, soft magnetic ferrite, organic waveguide and the electret film of preparing suitable thickness and diameter, by making waveguide-coupled magnetoelectricity device shown in accompanying drawing; Wherein bonding by tackifier between soft magnetic ferrite, organic waveguide and electret film, they have same external diameter; The diameter of magnet steel is less than the diameter of soft magnetic ferrite, and both are because the effect meeting in magnetic field is adsorbed naturally.The static magnetic field that magnet steel produces can make soft magnetic ferrite have a prestrain, has the Weak magentic-field of certain frequency to exist once extraneous, respective frequencies vibration can occur after acting on ferrite.Vibration sound field is by focusing and the rear electret film that arrives of transmission of organic waveguide, and in electret, electric charge asymmetricly moves to electrode under the effect of sound field stress, produces the output of electric charge and voltage on surface.
Beneficial effect: according to above narration, known the utility model has following features:
(1) simple for structure, the static magnetic field that utilizes magnet steel to produce makes soft magnetic ferrite have a prestrain;
(2) soft magnetic ferrite can be worked in very wide frequency range, is conducive to the measurement in magnetic field;
(3) by organic waveguide, sound field is focused on and transmitted, stress transmission is complete, and coupling state is desirable, makes magneto-electric property stable;
(4) because the thickness of electret film is very little, under the effect of sound field, not only only have thickness direction deformation, more can induce flexural vibrations, so deformation quantity is very large, and then output voltage is larger, frequency of operation is very wide.
Accompanying drawing explanation:
Fig. 1 is the structural representation of a kind of waveguide-coupled magnetoelectricity of the utility model device;
In figure: 1, magnet steel, 2, soft magnetic ferrite, 3, organic waveguide, 4, electret film.
Specific embodiments:
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail.
As shown in Figure 1, the soft magnetic ferrite of same diameter, organic waveguide and electret film is bonding by tackifier, the magnet steel of small diameter and soft magnetic ferrite be absorption naturally under the effect of magnetic force, and the static magnetic field that magnet steel produces can make soft magnetic ferrite have a prestrain.
To soft magnetic ferrite, applying an alternating magnetic field δ H, can there is respective frequencies vibration in ferrite, by the coupling of organic waveguide, at the voltage of electret film surface output respective frequencies.
This change in voltage frequency is identical with alternating magnetic field δ H frequency, and amplitude becomes with magnetic field size, is so about to magnetic field and is converted into Voltage-output.Thereby can realize the measurement to low-intensity magnetic field.
Claims (2)
1. a waveguide-coupled magnetoelectricity device, comprises magnet steel (1), soft magnetic ferrite (2), organic waveguide (3) and electret film (4), and wherein organic waveguide is circular, and all the other threes are circular; Bonding by tackifier between soft magnetic ferrite, organic waveguide and electret film, they have same external diameter; The diameter of magnet steel is less than the diameter of soft magnetic ferrite, and both are because the effect meeting in magnetic field is adsorbed naturally; It is characterized in that, the static magnetic field that magnet steel produces can make soft magnetic ferrite have a prestrain, once extraneous, there is the Weak magentic-field of certain frequency to exist, after acting on ferrite, can there is respective frequencies vibration, vibration sound field is by focusing and the rear electret film that arrives of transmission of organic waveguide, in electret, electric charge asymmetricly moves to electrode under the effect of sound field stress, produces the output of electric charge and voltage on surface.
2. a kind of waveguide-coupled magnetoelectricity device according to claim 1, is characterized in that, soft magnetic ferrite and electret film do not exist direct interface mechanical connection, and magnetoelectric effect is to realize by the coupling of sound field and organic waveguide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320619117.9U CN203480007U (en) | 2013-10-06 | 2013-10-06 | Waveguide coupling magnetoelectric device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320619117.9U CN203480007U (en) | 2013-10-06 | 2013-10-06 | Waveguide coupling magnetoelectric device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203480007U true CN203480007U (en) | 2014-03-12 |
Family
ID=50228315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320619117.9U Expired - Fee Related CN203480007U (en) | 2013-10-06 | 2013-10-06 | Waveguide coupling magnetoelectric device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203480007U (en) |
-
2013
- 2013-10-06 CN CN201320619117.9U patent/CN203480007U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20141006 |
|
| EXPY | Termination of patent right or utility model |