CN116441147A - Vibration transducer based on high-density coil - Google Patents
Vibration transducer based on high-density coil Download PDFInfo
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- CN116441147A CN116441147A CN202310205797.8A CN202310205797A CN116441147A CN 116441147 A CN116441147 A CN 116441147A CN 202310205797 A CN202310205797 A CN 202310205797A CN 116441147 A CN116441147 A CN 116441147A
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- coil
- vibration
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- vibration pickup
- flexible coil
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- 230000026683 transduction Effects 0.000 claims abstract description 26
- 238000010361 transduction Methods 0.000 claims abstract description 26
- 239000000758 substrate Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 238000009713 electroplating Methods 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract description 2
- 239000011257 shell material Substances 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241001124569 Lycaenidae Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000007907 direct compression Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
- B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/50—Application to a particular transducer type
- B06B2201/52—Electrodynamic transducer
- B06B2201/53—Electrodynamic transducer with vibrating magnet or coil
Abstract
A vibration transducer piece based on a high-density coil is provided with an A vibration pickup beam at the upper part of a transduction structure support, a B vibration pickup beam is fixed at the lower part of the transduction structure support, a permanent magnet is arranged between the A vibration pickup beam and the B vibration pickup beam, an upper laminated flexible coil is arranged at the center of a top cover of the transduction structure support, and a lower laminated flexible coil is arranged at the center of the bottom end of a shell base below the B vibration pickup beam; the positive and negative leads of the upper laminated flexible coil and the lower laminated flexible coil are connected to electrode plates of a circuit leading-out terminal in a cascading mode, the leading-out terminal is fixed at a center preformed hole of a shell top cover, and the shell top cover and a shell base are matched to form a shell of the vibration transducer; the invention adopts double beams and double coils to output, thereby reducing the transverse vibration of the device; the sensitivity of the device is improved, the magnet penetrating type structure of the traditional magneto-electric transduction structure by utilizing the winding coil is changed, the upper and lower integration modes of the magnet and the coil are adopted, and the whole volume of the device is effectively reduced.
Description
Technical Field
The invention relates to the technical field of magneto-electric vibration transduction, in particular to a vibration transducer based on a high-density coil.
Background
Magneto-electric vibration transducer devices are devices that convert vibrations into electrical signals and typically include vibration sensors that monitor vibration parameters such as vibration speed, acceleration, displacement, and vibration energy harvesters. Magneto-electric transduction structures are generally classified into moving-iron type magnet vibration and moving-coil type coil vibration. The current magneto-electric vibration transduction system is mainly of a moving coil type, the appearance volume is large, and most of coils in a transduction structure are macroscopic winding coils. The miniaturization and high performance of the magnetoelectric transducer are main research and development targets facing the emerging applications such as the wearable devices, the industrial wireless sensor networks and the like. However, when the magnetoelectric transducer is miniaturized, the magnetic field of the magnet is weak and the distribution range of the magnetic field is remarkably reduced, and the size of the wound coil is too large, and when the number of turns is large, most of the coils cannot effectively cut the magnetic induction lines.
The invention discloses a novel sensor, which is provided with three spring pieces and three cavities, wherein a push rod is arranged in the middle of the novel sensor, and the push rod drives magnetic steel to vibrate so as to realize output. The invention adopts a moving coil type scheme, and the vibration mode is through type vibration, but the coil is less, the magnetic field utilization rate is lower, and the processing difficulty of the shell is higher. Chinese application number CN201420016715.1, entitled vibration displacement sensor, the sensor has two cavities, and the casing has magnetic base. The shell is provided with the magnetic seat, so that the invention is convenient to install and use. Meanwhile, an integral circuit is arranged in the system to measure displacement, but the whole volume of the system is larger, which is unfavorable for the miniaturization development of the system. The invention discloses a magneto-electric speed sensor with a double-path structure, which is mainly designed by Chinese application patent number CN202021407427.0, wherein two ends of the magneto-electric speed sensor are provided with line leading-out terminals, a moving iron type through-core vibration scheme is adopted, and meanwhile, a plurality of layers of coils are added to improve sensitivity. The invention increases the convenience of use to a certain extent, and the structure occupies a larger volume, which is unfavorable for miniaturization of devices. Chinese application number CN201720800508.9, entitled magneto-electric vibration sensor, fixes the coil assembly in the housing, adopts moving-coil type through-the-center vibration scheme, and reduces system friction by designing the bearing structure. The invention mainly reduces the resonance frequency of the system, but has complicated internal structure, which is unfavorable for the overall miniaturization development of the system. The invention relates to a magneto-electric vibration measuring sensor, which has a structure similar to that of a magneto-electric vibration measuring sensor of a Chinese application patent No. CN201410663741.8, mainly optimizes a magnet shell material, designs a measuring rod limit at the same time, avoids overlarge vibration and damage of the sensor, but still has lower magnetic field utilization rate and is difficult to further miniaturize. The invention is characterized in that the Chinese application patent number CN201320169119.2 is a magneto-electric absolute speed sensor, the sensor structure is provided with two cavities, a double-spring scheme is adopted, a damping ring is arranged, a moving coil type through-core vibration scheme is still adopted, the invention is more concise and reliable, the whole volume is larger, the space volume cannot be further compressed, and the coil is still a winding coil, so that the system microminiaturization development is not facilitated. Chinese application patent number CN201810644638.7, entitled electromagnetic vibration energy collector based on combined coil, adopts top-down moving iron type vibration scheme, and proposes a new combined coil. The invention is miniaturized and integrated, but adopts a single beam structure, which is unfavorable for the transverse stability of the system, and the combined coil needs to be provided with a clamping plate, so that the invention is inconvenient to use.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a high-density coil-based vibration transducer, which is a magneto-electric vibration transducer based on laminated flexible coils, wherein the laminated planar flexible coils can integrate the high-density coils within a short distance, so that the high-density coils can effectively cut magnetic induction wires, and the high-density coil-based vibration transducer has the advantages of high density and small volume, and can realize the increase of the number of turns of the coils through multi-layer stacking; meanwhile, a moving iron type transduction structure is adopted, so that the coil and the magnet are integrated in the vertical direction, and the volume utilization rate is improved; by adopting the double-beam double-coil structural scheme, the internal structural space of the sensor is optimized, the volume of the vibration transducer is reduced, the mechanical stability of the transducer element is improved, and the output sensitivity is improved.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the vibration transducer based on high-density coil comprises a transduction structure support 1 designed into an upper part and a lower part, wherein an A vibration pickup beam 2 is arranged at the upper part of the transduction structure support 1, a B vibration pickup beam 3 is fixed at the lower part of the transduction structure support 1, a permanent magnet 6 is arranged between the A vibration pickup beam 2 and the B vibration pickup beam 3, an upper laminated flexible coil 4 is arranged at the center of a top cover of the transduction structure support 1, and a lower laminated flexible coil 5 is arranged at the center of the bottom end of a shell base 7 below the B vibration pickup beam 3; the positive electrode lead and the negative electrode lead of the upper laminated flexible coil 4 and the lower laminated flexible coil 5 are connected to electrode plates of a circuit leading-out terminal 9 in a cascading mode, the leading-out terminal 9 is fixed at a center reserved hole of a shell top cover 8, and the shell top cover 8 and a shell base 7 are matched to form a shell of the vibration transducer.
The upper laminated flexible coil 4 and the lower laminated flexible coil 5 are plane flexible coils capable of being laminated, and comprise flexible substrates 11 which are arranged in multiple layers, and the upper surface and the lower surface of the flexible substrates 11 are coils 10; a metal electrode 12 is provided between adjacent flexible substrates 11.
The coil 10 is a high-density and high-turns coil integrated by a hot-pressing process or an electroplating process.
The vibration picking beams A2 and B are plane springs.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the design of double beams and double coils output, namely the design of an A vibration pickup beam 2 and a B vibration pickup beam 3 and the design of an upper laminated flexible coil 4 and a lower laminated flexible coil 5, wherein the double beams mainly have the functions of improving the integral mechanical stability of the device and reducing the transverse vibration of the device; the double coils fully utilize the magnetic field of the permanent magnet 6 to be distributed up and down, not only can improve the sensitivity of the device, but also change the magnet penetrating type structure by utilizing the winding coil in the prior magneto-electric transduction structure, and effectively reduce the whole volume of the device by adopting the up-down integration mode of the magnet and the coil.
2. The invention is based on the laminated planar flexible coil, so that the magnet and the coil can be integrated in the vertical direction, the magnet penetrating structure of the winding coil of the traditional magneto-electric transduction system is changed, and the device volume can be fully reduced on the premise of improving the sensitivity.
3. The planar coil has the characteristics of high density and small volume, and can be stacked according to requirements. The laminated flexible coil can integrate the turns of the ultra-high coil in a short distance around the magnet by stacking the planar coils printed on the ultra-thin flexible substrate, and the bottleneck that the traditional winding coil cannot cut the weak magnetic field of the miniature magnet distributed in a small range due to large size is changed.
4. The device can be used as a vibration sensor for detecting physical quantities such as vibration displacement, speed, acceleration and the like without power supply; the device can also be used as a vibration energy collector for collecting vibration energy.
Drawings
Fig. 1 is a schematic view of the structure in the present invention.
Fig. 2 is a schematic structural view of a single flexible coil in a laminated flexible coil.
Fig. 3 is a schematic diagram of a stacked structure of stacked flexible coils.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a vibration transducer based on a high-density coil includes a transduction structure support 1 designed as an upper part and a lower part, wherein an a vibration pickup beam 2 is arranged on the upper part of the transduction structure support 1, the a vibration pickup beam 2 can be fixed in the transduction structure support 1 in a screw mode, a riveting mode, an adhesion mode or a direct compression mode, the transduction structure support 1 mainly provides a supporting point for the a vibration pickup beam 2 and the B vibration pickup beam 3, the B vibration pickup beam 3 is fixed on the lower part of the transduction structure support 1, a permanent magnet 6 is arranged between the a vibration pickup beam 2 and the B vibration pickup beam 3, the a vibration pickup beam 2 and the B vibration pickup beam 3 are a plane spring which provides a support for the permanent magnet 6, and the vibration pickup beam 2 and the permanent magnet 6 are fixed in a specific manner such as an adhesion mode or a riveting mode; but also act as springs in a vibrating environment. The permanent magnet 6 is in the vibration transducing structure, which mainly provides the coils 4, 5 with a magnetic field. And also acts as a mass to adjust the system resonant frequency. The top cover center of the transduction structure support 1 is provided with an upper laminated flexible coil 4, the bottom end center of a shell base 7 below the B vibration pickup beam 3 is provided with a lower laminated flexible coil 5, the upper laminated flexible coil 4 and the lower laminated flexible coil 5 are high-density and small-volume coils, the specific implementation mode is shown as 2, the upper laminated flexible coil 4 and the lower laminated flexible coil 5 are respectively fixed at the top cover center of the transduction structure support 1 and the bottom end center of the shell base 7 in a bonding mode, screws and the like, and the upper laminated flexible coil 4 and the lower laminated flexible coil 5 mainly serve as magnetic induction wires along with the vibration of a permanent magnet 6 in a vibration environment to generate induced electromotive force.
The positive and negative leads of the upper laminated flexible coil 4 and the lower laminated flexible coil 5 are connected to the electrode plates of the circuit leading-out terminal 9 in a cascading manner through welding, the positive and negative leads of the coils are reserved when the upper laminated flexible coil 4 and the lower laminated flexible coil 5 are fixed, the positive and negative leads of the upper and lower coils are connected to the electrode plates of the circuit leading-out terminal 9 in a cascading manner through welding, and a lead slot is designed on the side wall of the housing base 7, so that the lead of the coils is conveniently led out. The lead-out terminal 9 is fixed at the center preformed hole of the shell top cover 8, the lead-out terminal 9 is provided with two electrodes, the two electrodes are respectively connected with the positive and negative leads of the coil, and the lead-out terminal can be connected and output in a cable mode. The housing top cover 8 and the housing base 7 are matched to form a housing of the vibration transducer, and the housing top cover and the housing base can be fixed by threads, screws or bonding. The center of the bottom of the shell base 7 is provided with a threaded hole, so that the shell base is convenient to fix on equipment to be measured.
The upper laminated flexible coil 4 and the lower laminated flexible coil 5 are plane flexible coils which can be laminated, and have the advantages of high density, small volume, lamination and the like. As shown in fig. 2, the flexible substrate 11 comprises a plurality of layers, which has the advantages of being ultrathin, bendable and the like. The upper and lower surfaces of the flexible substrate 11 are high-density, high-turn coils 10 integrated by a hot-pressing process or an electroplating process. Between adjacent flexible substrates 11 are arranged metal electrodes 12 which mainly serve to provide a circuit path and a mechanical connection between the stacked coils when stacked. The substrate 11 of the planar flexible coil, the coil 10, the metal electrode 12 may have any desired shape such as rectangular, circular, diamond, etc. As shown in fig. 3, a desired number of planar flexible coils are stacked, aligned, and then a multi-layered laminated flexible coil is realized through a bonding process or an adhesive process. Meanwhile, a fixing hole can be formed in the planar flexible coil so as to facilitate fixing of the coil.
The working principle of the invention is as follows: when the invention is placed in a vibration environment, the permanent magnet 6 vibrates in the up-down direction in the figure under the action of the vibration picking beam A2 and the vibration picking beam B3, in the vibration process, the magnetic field generated by the permanent magnet 6 cuts the upper laminated flexible coil 4 and the lower laminated flexible coil 5, induced electromotive forces are respectively generated on the upper laminated flexible coil 4 and the lower laminated flexible coil 5 according to the principle of an electromagnetic law, and then the output voltages of the upper laminated flexible coil 4 and the lower laminated flexible coil 5 are connected in series in a cascading mode. The electrode leads of the lower laminated flexible coil 5 are connected to one ends of the lead-out terminals 9 by designing lead grooves in the side walls of the housing base 7, and the electrode lead terminals of the upper laminated flexible coil 4 are connected to the other ends of the lead-out terminals 9. The external world can realize the conversion of vibration energy in the environment into electric energy by measuring the voltage of the two electrodes of the lead terminal 9.
The upper laminated flexible coil 4 and the lower laminated flexible coil 5 are formed by stacking planar flexible coils. The planar flexible coil has an ultra-thin, flexible substrate 11 that is flexible; the upper and lower surfaces of the flexible substrate 11 are high-density and high-turn coils 10 integrated by a hot-pressing process or an electroplating process; a metal electrode 12 is arranged between adjacent flexible substrates 11; meanwhile, a fixing hole can be formed in the planar flexible coil so as to facilitate fixing of the coil. When the laminated flexible coil is manufactured, a required number of planar flexible coils are stacked, and after the planar flexible coils are aligned, the multilayer laminated flexible coil is realized through a bonding process or an adhering process.
Claims (4)
1. The vibration transducer based on the high-density coil is characterized by comprising a transduction structure support (1) designed into an upper part and a lower part, wherein an A vibration pickup beam (2) is arranged at the upper part of the transduction structure support (1), a B vibration pickup beam (3) is fixed at the lower part of the transduction structure support (1), a permanent magnet (6) is arranged between the A vibration pickup beam (2) and the B vibration pickup beam (3), an upper lamination flexible coil (4) is arranged at the center of a top cover of the transduction structure support (1), and a lower lamination flexible coil (5) is arranged at the center of the bottom end of a shell base (7) below the B vibration pickup beam (3); the positive electrode lead and the negative electrode lead of the upper laminated flexible coil (4) and the lower laminated flexible coil (5) are connected to electrode plates of a circuit leading-out terminal (9) in a cascading mode, the leading-out terminal (9) is fixed at a center reserved hole of a shell top cover (8), and the shell top cover (8) and a shell base (7) are matched to form a shell of the vibration transducer.
2. A vibrating transducer device based on high-density coils according to claim 1, wherein the upper laminated flexible coil (4) and the lower laminated flexible coil (5) are planar flexible coils capable of being laminated, comprising a plurality of layers of flexible substrates (11), and the upper and lower surfaces of the flexible substrates (11) are coils (10); a metal electrode (12) is arranged between adjacent flexible substrates (11).
3. A vibrating transducer device based on high-density coils as claimed in claim 1, wherein the coils (10) are high-density, high-turn coils integrated by means of a thermo-compression process or an electroplating process.
4. A vibrating transducer device based on high-density coils according to claim 1, wherein the a vibration pickup beams (2) and the B vibration pickup beams (3) are planar springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310205797.8A CN116441147A (en) | 2023-03-06 | 2023-03-06 | Vibration transducer based on high-density coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310205797.8A CN116441147A (en) | 2023-03-06 | 2023-03-06 | Vibration transducer based on high-density coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116441147A true CN116441147A (en) | 2023-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310205797.8A Pending CN116441147A (en) | 2023-03-06 | 2023-03-06 | Vibration transducer based on high-density coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116441147A (en) |
-
2023
- 2023-03-06 CN CN202310205797.8A patent/CN116441147A/en active Pending
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