CN210665784U - Novel magnetoelectric effect revolution speed transducer - Google Patents
Novel magnetoelectric effect revolution speed transducer Download PDFInfo
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- CN210665784U CN210665784U CN201921753005.6U CN201921753005U CN210665784U CN 210665784 U CN210665784 U CN 210665784U CN 201921753005 U CN201921753005 U CN 201921753005U CN 210665784 U CN210665784 U CN 210665784U
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Abstract
A new kind of magnetoelectric effect revolution speed transducers, including sensing counting assembly and checkout gear, the said sensing counting assembly includes the piezoelectric material stick, the upper and lower two sides of the said piezoelectric material stick have magnetostrictive slim stick separately, the said piezoelectric material stick and the left side end of the said magnetostrictive slim stick have permanent magnet, the upper and lower two sides of the said piezoelectric material stick are connected with pulse counter electricity through two lead wires separately, the said checkout gear includes the axle collar, there are magnet blocks on the circumference of the said axle collar evenly and vertically, the utility model utilizes the giant magnetostrictive effect of the magnetostrictive material and the piezoelectric effect of the piezoelectric material to develop a revolution speed transducer which has novel structure, small volume, can produce the voltage pulse signal, low excitation magnetic field without power supply, another characteristic of the transducer is now, it need not the power supply and can realize the detection to the outside alternating magnetic signal through the spontaneous electricity, therefore, the sensor is also an energy-saving sensor and has wide application value in the actual detection technology.
Description
Technical Field
The utility model relates to a sensor technical field, concretely relates to novel magnetoelectric effect speed sensor.
Background
The magnetoelectric effect refers to an effect of changing an electric field in a material by using a magnetic field, namely an effect of generating an electric signal output by using the magnetic field. At present, the magnetoelectric effect is one of international research hotspots, people have developed a large number of magnetoelectric effect theories and experimental researches of single-phase materials, but the magnetoelectric effect of the single-phase material is extremely weak, and the single-phase material is not applied at present and only some basic researches are carried out; the research on the magnetoelectric effect of a multiphase material focuses on the research on devices made of laminated materials with larger magnetoelectric conversion coefficients and application prospects, namely, the research on devices made of laminated structural materials formed by combining magnetostrictive materials and piezoelectric materials utilizes the magnetostrictive materials to generate magnetostriction under the action of an external magnetic field so as to generate tangential stress on the surfaces of the piezoelectric materials, and the piezoelectric materials are deformed under the action of the stress so as to generate charges on the two surfaces or generate an electric field between the two surfaces so as to form a voltage effect. The magnetoelectric effect has huge magnetoelectric conversion coefficient, has wide application prospect in the manufacture of devices, and the rotation speed sensor which is manufactured by utilizing the magnetoelectric effect and has practical application value has not been reported yet.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a thin bar-shaped magnetostrictive material passes through the piezoelectric material through transverse polarization and constitutes the sensor of detectable pivot rotational speed through stacked structure, and wherein biasing magnetic field is produced by permanent magnetic material, and permanent magnetic material directly closes as an organic whole with stacked structure, need not to provide biasing magnetic field through external coil or by outside large-scale permanent magnetism ring.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel magnetoelectric effect speed sensor, includes sensing counting assembly and detection device, sensing counting assembly includes the piezoelectric material stick, the both ends face bonds respectively about the piezoelectric material stick has the magnetostrictive slim stick, the piezoelectric material stick with the left side terminal surface of magnetostrictive slim stick bonds has the permanent magnet, the upper and lower two sides of piezoelectric material stick are connected with the pulse counter electricity through two lead wires respectively, detection device includes the axle collar, even vertical magnet piece that is equipped with on the global of axle collar.
Preferably, the upper and lower end surfaces of the piezoelectric material rod are silver-coated electrodes.
Preferably, the permanent magnet is an NdFeB permanent magnet material.
Preferably, the magnetostrictive thin rod is made of Terfenol-D material.
(III) advantageous effects
The utility model discloses utilize the giant magnetostriction effect of magnetostriction material and the piezoelectric effect of piezoelectric material to develop a novel structure, small, the no power can produce voltage signal, the rotational speed sensor in low excitation magnetic field, current rotational speed sensor, some utilize the electromagnetic induction principle, inevitably contain coil and yoke, its volume is great, and output signal is closely related with the rotational speed, output signal is very little when the rotational speed is lower; the sensor has the other characteristic that the detection of the external alternating magnetic signal can be realized through self-generation without power supply, so the sensor is also an energy-saving sensor and has wide application value in the actual detection technology.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-piezoelectric material rod, 2-magnetostriction thin rod, 3-permanent magnet, 4-lead, 5-pulse counter, 6-shaft collar, 7-magnet block and 8-rotating shaft to be tested.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a novel magnetoelectric effect rotation speed sensor comprises a sensing counting device and a detection device, wherein the sensing counting device comprises a piezoelectric material rod 1, magnetostrictive thin rods 2 are respectively bonded on the upper surface and the lower surface of the piezoelectric material rod 1, permanent magnets 3 are bonded on the left end surfaces of the piezoelectric material rod 1 and the magnetostrictive thin rods 2, the upper surface and the lower surface of the piezoelectric material rod 1 are respectively and electrically connected with a pulse counter 5 through two leads 4, the detection device comprises a shaft collar 6, and magnet blocks 7 are uniformly and vertically arranged on the peripheral surface of the shaft collar 6; the upper surface and the lower surface of the piezoelectric material rod 1 are silver-coated electrodes; the permanent magnet 3 is made of NdFeB permanent magnet material; the magnetostrictive thin rod 2 is made of Terfenol-D material.
The utility model discloses when specifically installing the preparation, adopt the screen printing method to print silver oxide thick liquids on piezoelectric material stick 1 upper and lower two sides earlier, obtain by silver electrode through high temperature treatment, add direct current high pressure on two electrodes again and make piezoelectric material produce along thickness direction polarization, make magnetostrictive rod 2 with Terfenol-D material, magnetostrictive rod 2 surface adopts polishing method to make its and piezoelectric material stick 1 upper and lower two sides bond, magnetostrictive rod 2 width and piezoelectric material stick 1 are aequilate, and magnetostrictive rod 2 and piezoelectric material stick 1 are sandwich structure, the NdFeB permanent magnet 3 that will have high magnetic energy pole again pastes in the left end face of magnetostrictive rod 2 and piezoelectric material stick 1, accomplish the preparation equipment of sensing counting assembly promptly.
As an embodiment of the utility model, the utility model discloses when specifically using, with long 10mm, wide 1mm, thick 0.8 mm's Pb (Zr) along transverse polarization1-xTix)O3The piezoelectric material rod 1 and each magnetostrictive thin rod 2 of Terfenol-D (TbDyFe) with the length of 10mm, the width of 1mm and the thickness of 1mm are adhered to form a sandwich structure (the middle layer is a piezoelectric layer, and the two sides are made of magnetostrictive materials), the easy magnetization direction of the magnetostrictive thin rod 2 is along the length direction of the rod, and electrode leads 4 are manufactured on the two sides of the piezoelectric material rod 1; is of magneticThe permanent magnet 3 which provides a bias magnetic field by the telescopic slim rods 2 is made of NdFeB material with extremely high magnetic energy product, and the surface magnetic field of the permanent magnet is higher than 780 Gs; the shaft collar 6 is sleeved on the rotating shaft 8 of the rotating speed to be measured, the magnetostrictive thin rod 2 in the bias magnetic field generates magnetostriction under the action of the external magnetic field of the magnet block 7, and then the piezoelectric material rod 1 tightly adhered to the magnetostrictive thin rod 2 is driven to expand and contract by the magnetostrictive thin rod 2, so that the upper surface and the lower surface of the piezoelectric material rod 1 generate voltage due to the piezoelectric effect, counting is carried out through the pulse counter 5, and the sensitivity obtained by detecting the alternating magnetic field by the sensor formed by the piezoelectric material rod 1 and the two magnetostrictive thin rods 2 is 78 mV/Oe.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. A novel magnetoelectric effect rotation speed sensor comprises a sensing counting device and a detection device, and is characterized in that; the sensing counting device comprises a piezoelectric material rod (1), magnetostrictive thin rods (2) are bonded to the upper surface and the lower surface of the piezoelectric material rod (1) respectively, permanent magnets (3) are bonded to the left end faces of the magnetostrictive thin rods (2), the upper surface and the lower surface of the piezoelectric material rod (1) are electrically connected with a pulse counter (5) through two leads (4), the detection device comprises a shaft collar (6), and magnet blocks (7) are uniformly and vertically arranged on the peripheral surface of the shaft collar (6).
2. The novel magnetoelectric effect rotation speed sensor according to claim 1, characterized in that: the upper surface and the lower surface of the piezoelectric material rod (1) are silver-coated electrodes.
3. The novel magnetoelectric effect rotation speed sensor according to claim 1, characterized in that: the permanent magnet (3) is made of NdFeB permanent magnet material.
4. The novel magnetoelectric effect rotation speed sensor according to claim 1, characterized in that: the magnetostrictive thin rod (2) is made of Terfenol-D material.
5. The novel magnetoelectric effect rotation speed sensor according to claim 1, characterized in that: the piezoelectric material rod (1) is Pb (Zr)1-xTix)O3A material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921753005.6U CN210665784U (en) | 2019-10-18 | 2019-10-18 | Novel magnetoelectric effect revolution speed transducer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921753005.6U CN210665784U (en) | 2019-10-18 | 2019-10-18 | Novel magnetoelectric effect revolution speed transducer |
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| CN210665784U true CN210665784U (en) | 2020-06-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125792A (en) * | 2021-04-22 | 2021-07-16 | 长春工业大学 | Piezoelectric-electromagnetic combined sensing device for measuring rotating speed |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125792A (en) * | 2021-04-22 | 2021-07-16 | 长春工业大学 | Piezoelectric-electromagnetic combined sensing device for measuring rotating speed |
| CN113125792B (en) * | 2021-04-22 | 2023-01-31 | 长春工业大学 | Piezoelectric-electromagnetic combined sensing device for measuring rotating speed |
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Effective date of registration: 20210527 Address after: 215316 3rd floor, building 4, 66 Kaigui Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: KUNSHAN LANDERSEN ELECTRICAL AND MECHANICAL TECHNOLOGY Co.,Ltd. Address before: 210044 No. 219 Ning six road, Jiangbei new district, Nanjing, Jiangsu Patentee before: NANJING University OF INFORMATION SCIENCE & TECHNOLOGY |