CN108613688A - Multi-functional set sensing device based on magnetic electric compound material and electret - Google Patents
Multi-functional set sensing device based on magnetic electric compound material and electret Download PDFInfo
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- CN108613688A CN108613688A CN201810811128.4A CN201810811128A CN108613688A CN 108613688 A CN108613688 A CN 108613688A CN 201810811128 A CN201810811128 A CN 201810811128A CN 108613688 A CN108613688 A CN 108613688A
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- electret
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
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- Geophysics And Detection Of Objects (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of multi-functional set sensing device based on magnetic electric compound material and electret.The present invention includes magnetic electric compound material, electret and metal polar plate.Wound around coil on magnetic electric compound material, one end are fixed, and the other end is bonded with metal polar plate, and electret is bonded in one end of another metal polar plate.Plane-parallel capacitor is constituted between two metal polar plates.Magnetic electric compound material will produce deformation under electric field, magnetic field, active force or extrinsic current, and the metal polar plate being attached thereto generates displacement.This will generate electric potential signal between two-plate, and potential change is detected by external unit, play the role of detecting electric field, magnetic field, active force or electric current, integrated effect is detected on so as to gather multiple functions.In addition, the configuration of the present invention is simple, at low cost, it is easy to accomplish device miniaturization is easy to carry.
Description
Technical field
It is specifically a kind of based on magnetic electric compound material and electret the present invention relates to a kind of multi-functional set sensing device
Multi-functional set sensing device, this sensing device device can be used for the comprehensive inspection of the detection of electric field, magnetic field, electric current and active force
It surveys.
Background technology
Magnetic electric compound material is a kind of novel functional material, and being will be with the object of the substance and ferroelectric phase of ferromagnetic phase
Matter is formed in certain method in conjunction with conversion, with magnetostrictive effect, piezoelectric effect and resulting
Magnetoelectric effect etc..Since to make magnetic electric compound material have in fields such as memory, detector, sensor etc. important for these characteristics
Application prospect.
Electret is a kind of special dielectric substance, can retain the polarization stored by certain way for a long time
Charge and dipole charge.Therefore electret has " electret " another address.Because persistently possessing polarization charge inside it
For reason so that it can provide stable voltage, this characteristic makes electret be chiefly used in that capacitor, energy converter, biography is made
The novel electrons equipment such as sound device.
Presently, there are sensing device be typically all a kind of function, such as magnetic sensing, fax sense, power sensing etc..These are passed
Induction device is very difficult to apply under complex environment, while if to realize the sensing of multiple functions, needing due to having a single function
Different sensing devices is prepared, this virtually increases cost of manufacture.
Invention content
Based on the application realized under complex environment, and cost of manufacture is reduced, realizes the multifunctional integrated of sensing function, this
Invention proposes a kind of novel multifunctional unit sensing device.The device is by by magnetic electric compound material and electret group
Altogether, it can not only be used for detecting electricity, magnetic field, can also be used to detection stress and electric current.This novel sensing device tool
There is simple structure, it is of low cost, the characteristics of multi-functional detection together as one.
The technical solution adopted by the present invention to solve the technical problems is：
The present invention includes electret, magnetic electric compound material and metallic plate, and magnetic electric compound material one end is connect with metallic plate, separately
One end is fixed；Electret is connect with another metallic plate, and two pieces of metallic plates form a plane-parallel capacitor；The magnetoelectricity is compound
Coil is wound on material.
Furtherly, two pieces of metallic plates are the air gap or elastic dielectric material.
Beneficial effects of the present invention：It is constituted using the magnetic electric compound material and electret being easily obtained a kind of novel more
The magnetic-electric sensing device of function set.Internal structure is simple, of low cost, is easy to measure, device is small easy to carry.The present invention
External electric field, external magnetic field, active force and external impressed current can be detected.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the operation principle schematic diagram of the present invention.
Fig. 2 is the organigram of the present invention.
In figure：1. electret, 2. metal polar plate A, 3. metal polar plate B, 4. magnetic electric compound materials, 5. the air gaps, 6.
Outer signal processing unit, 7. coils, 8. conducting wires, 9. shells.
Specific implementation mode
Description below is illustrated to the present invention, and limitation of the invention is not to be taken as：
The present invention is will to be coiled on magnetic electric compound material, and one end of magnetic electric compound material is fixed, the other end and metal electrode
Plate A is bonded together, and electret back electrode and metal electrode board B are bonding, and two metallic plates form a plane-parallel capacitor.
Under the action of external electric field, magnetic field, active force or coil electrical current, magnetic electric compound material can deform upon, and drive metal electrode
Plate A generates movement, changes the spacing between capacitor two-plate, and then change the capacitance of plane-parallel capacitor.Due to electret
The carried charge of body is certain, i.e. the charge of plane-parallel capacitor remains unchanged, so the voltage difference at plane-parallel capacitor both ends can be with
It the change of spacing and changes.That is, if having electric current change in extraneous electric field, magnetic field, active force or the coil changed
When change, plane-parallel capacitor the two poles of the earth plate spacing is caused to change, and then change the voltage difference between two-plate.By detecting the two poles of the earth
Voltage difference between plate can detect external electric field, external magnetic field or extrinsic current.This magnetoelectricity composite sensing device is utilized, it can
Incude the variation of external electric field, magnetic field, active force and electric current, and then realizes the effect of multifunctional comprehensive detection.
Operation principle schematic diagram is shown in Fig. 1, and back electrode and the metal plate A 2 of electret 1 are bonded together, parallel-plate
Another metal polar plate B 3 of capacitor and one end of magnetic electric compound material 4 are bonding, and the other end of magnetic electric compound material is solid
It is fixed.Two metal polar plates constitute a plane-parallel capacitor, are made of the air gap 5 between them（It also can be by elastomeric dielectric
Material forms）.By 8 external voltage detecting element 6 of conducting wire between two-plate, it can detect and be generated due to pole plate change in displacement
Voltage change.Wound around coil 7 on magnetic electric compound material.Lead to when device is under electric field, magnetic field, outer force effect or in coil 7
When electric current, since magnetic electric compound material will produce deformation, bonded pole plate B is driven to generate movement, change parallel-plate electricity
The capacitance of spacing between container two-plate, this meeting plane-parallel capacitor can change.The reason is as follows that：Plane-parallel capacitor
Capacitance C=ε S/d, wherein ε are the capacitivity between two-plate, and S is the area of one of pole plate, d between two-plate away from
From when spacing d changes, capacitance C can change.Due to relational expression U=Q/C between parallel-plate voltage, electricity and capacitance
（Wherein U is the voltage difference between two-plate, and Q is the electricity of pole plate, and C is the capacitance of capacitor）, and the electricity Q of electret can recognize
To be constant, then when capacitance C changes, the voltage between two-plate can change, by outside elements 6 detect two-plate it
Between voltage variation, can be with space exploration electric field, magnetic field, active force or electric current.
Fig. 2 is the organigram of invention.In Fig. 2 embodiments, electret back electrode face and metal polar plate A are bonded in one
It rises.One end of magnetic electric compound material and metal polar plate B are bonding, and the other end is inserted into inside fixing shell 9.On magnetic electric compound material
It is tied with coil.In this way, in external electric field, magnetic field or external impressed current, magnetic electric compound material drives metal polar plate B towards metal polar plate
It moves in the direction of A.Due to two metal plate spacings change caused by variation voltage amplified by outer signal processing unit it is defeated
Go out signal.Which achieves the detections to electric field, magnetic field, active force and external impressed current.
Claims (3)
1. the multi-functional set sensing device based on magnetic electric compound material and electret, including electret, magnetoelectricity composite wood
Material and metallic plate, it is characterised in that：Magnetic electric compound material one end is connect with metallic plate, and the other end is fixed；Electret and another gold
Belong to plate connection, two pieces of metallic plates form a plane-parallel capacitor；It is wound with coil on the magnetic electric compound material.
2. the multi-functional set sensing device according to claim 1 based on magnetic electric compound material and electret, feature
It is：Two pieces of metallic plates are the air gap or elastic dielectric material.
3. a kind of collection of multi-functional set sensing device described in claim 1 in electric field, magnetic field, active force and current detecting
Close application.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810811128.4A CN108613688A (en) | 2018-07-23 | 2018-07-23 | Multi-functional set sensing device based on magnetic electric compound material and electret |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810811128.4A CN108613688A (en) | 2018-07-23 | 2018-07-23 | Multi-functional set sensing device based on magnetic electric compound material and electret |
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| Publication Number | Publication Date |
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| CN108613688A true CN108613688A (en) | 2018-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810811128.4A Pending CN108613688A (en) | 2018-07-23 | 2018-07-23 | Multi-functional set sensing device based on magnetic electric compound material and electret |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596472A (en) * | 2019-09-29 | 2019-12-20 | 清华大学 | Dielectric polarization capacitance type electrostatic field measuring method and system |
| CN111710778A (en) * | 2020-07-27 | 2020-09-25 | 西安交通大学 | Stretchable magnetoelectric electret and preparation method thereof |
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| CN203180032U (en) * | 2013-03-21 | 2013-09-04 | 中国计量学院 | Magnetic-electric dual-adjustable band pass filter |
| CN105487125A (en) * | 2015-12-25 | 2016-04-13 | 北京大学 | Magnetic metal detection sensor |
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| CN106771676A (en) * | 2017-01-27 | 2017-05-31 | 中国计量大学 | Based on the electric-field sensor probe that electrostriction material and electret are constructed |
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2018
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Patent Citations (7)
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| CN102170247A (en) * | 2011-04-25 | 2011-08-31 | 中北大学 | Energy acquisition circuit of micro-power device driven by piezoelectricity-magnetoelectricity combined vibration |
| CN203180032U (en) * | 2013-03-21 | 2013-09-04 | 中国计量学院 | Magnetic-electric dual-adjustable band pass filter |
| CN106289385A (en) * | 2015-06-11 | 2017-01-04 | 南京理工大学 | A kind of Multifunction Sensor |
| CN105487125A (en) * | 2015-12-25 | 2016-04-13 | 北京大学 | Magnetic metal detection sensor |
| CN106291408A (en) * | 2016-10-11 | 2017-01-04 | 中国计量大学 | Based on magnetostrictor and the magnetoelastic transducer of electret |
| CN106771676A (en) * | 2017-01-27 | 2017-05-31 | 中国计量大学 | Based on the electric-field sensor probe that electrostriction material and electret are constructed |
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Non-Patent Citations (3)
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| YUN ZHOU等: "Magnetoelectric response in a new tunable capacitor system based on magnetostrictive material and electret" * |
| 郑洋;谢丹;刘理天;: "用于磁传感器的新结构磁电复合材料" * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596472A (en) * | 2019-09-29 | 2019-12-20 | 清华大学 | Dielectric polarization capacitance type electrostatic field measuring method and system |
| CN111710778A (en) * | 2020-07-27 | 2020-09-25 | 西安交通大学 | Stretchable magnetoelectric electret and preparation method thereof |
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