CN111817604A - Broadband cantilever beam energy collecting device - Google Patents
Broadband cantilever beam energy collecting device Download PDFInfo
- Publication number
- CN111817604A CN111817604A CN202010684036.1A CN202010684036A CN111817604A CN 111817604 A CN111817604 A CN 111817604A CN 202010684036 A CN202010684036 A CN 202010684036A CN 111817604 A CN111817604 A CN 111817604A
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- Prior art keywords
- cantilever beam
- broadband
- sliding block
- groove
- block
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- 239000000463 material Substances 0.000 claims abstract description 20
- 238000003306 harvesting Methods 0.000 claims description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention provides a broadband cantilever beam energy collecting device, wherein a connecting part is fixed on a vibration source; one end of the cantilever beam is fixed on the connecting part; the piezoelectric material block is arranged on the top surface of the cantilever beam close to the fixed end and is connected with an external energy acquisition circuit; the mass block is arranged on the top surface of the cantilever beam close to the free end; still be equipped with the recess on the cantilever beam, the cantilever beam direction is followed to the recess, and the sliding block sets up in the recess at least partially, and the sliding block is limited by the recess and freely slides along the recess. When the vibration source is used, the cantilever beam vibrates under the driving of the vibration source, the sliding block freely moves in the groove, and the vibration frequency of the cantilever beam is changed to match the vibration frequency of the vibration source, so that the energy collection efficiency is improved. Because the sliding block has a certain moving space in the groove, the broadband cantilever beam energy collection device can achieve the purpose of broadband cantilever beam energy collection.
Description
Technical Field
The invention relates to the field of energy conversion and collection, in particular to a broadband cantilever beam energy collection device.
Background
Common vibration energy harvesting devices include diaphragm, cymbal, and cantilever beam. The cantilever beam type vibration energy collecting device has the advantages of simple structure and easiness in realization, and can ensure high output power even under lower vibration frequency, so that the cantilever beam type vibration energy collecting device is widely concerned in vibration energy collection. The traditional cantilever beam type vibration energy collecting device is narrow in frequency band, and the vibration energy collecting efficiency is reduced.
The invention patent application CN108471258A provides a magnet coupling double-cantilever beam vibration energy collecting device, wherein magnetic fields are arranged on an upper cantilever beam and a lower cantilever beam, and the bandwidth of energy collection is improved through magnet coupling. However, the vibration frequency of the cantilever cannot be self-adjusted to accommodate the frequency of the vibration source.
Disclosure of Invention
In order to solve the problems, the invention provides a broadband cantilever beam energy collecting device which comprises a vibration source, a connecting part, a cantilever beam, a piezoelectric material block, a mass block, a groove and a sliding block, wherein the vibration source is arranged on the cantilever beam; the connecting part is fixed on the vibration source; one end of the cantilever beam is fixed on the connecting part; the piezoelectric material block is arranged on the top surface of the cantilever beam close to the fixed end and is connected with an external energy acquisition circuit; the mass block is arranged on the top surface of the cantilever beam close to the free end; still be equipped with the recess on the cantilever beam, the cantilever beam direction is followed to the recess, and the sliding block sets up in the recess at least partially, and the sliding block is limited by the recess and freely slides along the recess.
Furthermore, the cantilever beam is made of aluminum alloy, silicon, semiconductor materials and diamond.
Further, the material of the piezoelectric material block is piezoelectric ceramic or polyvinylidene fluoride.
Further, the mass is made of aluminum alloy.
Furthermore, the connecting part and the vibration source are connected by adopting a bolt, and the connecting part is made of copper.
Further, the material of the sliding block is metal.
Further, the slider is elliptical in shape.
Further, the top of the slider protrudes out of the groove.
Further, the ends of the recess are in contact with the mass.
Furthermore, an elastic material is arranged between the mass block and the cantilever beam.
The invention has the beneficial effects that: the invention provides a broadband cantilever beam energy collecting device, wherein a connecting part is fixed on a vibration source; one end of the cantilever beam is fixed on the connecting part; the piezoelectric material block is arranged on the top surface of the cantilever beam close to the fixed end and is connected with an external energy acquisition circuit; the mass block is arranged on the top surface of the cantilever beam close to the free end; still be equipped with the recess on the cantilever beam, the cantilever beam direction is followed to the recess, and the sliding block sets up in the recess at least partially, and the sliding block is limited by the recess and freely slides along the recess. When the vibration source is used, the cantilever beam vibrates under the driving of the vibration source, the sliding block freely moves in the groove, and the vibration frequency of the cantilever beam is changed to match the vibration frequency of the vibration source, so that the energy collection efficiency is improved. Because the sliding block has a certain moving space in the groove, the broadband cantilever beam energy collection device can achieve the purpose of broadband cantilever beam energy collection.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
Figure 1 is a schematic diagram of a broadband cantilever beam energy harvesting device.
Figure 2 is a schematic diagram of yet another broadband cantilever beam energy harvesting device.
Figure 3 is a schematic diagram of yet another broadband cantilever beam energy harvesting device.
In the figure: 1. a vibration source; 2. a connecting portion; 3. a cantilever beam; 4. a block of piezoelectric material; 5. a mass block; 6. a groove; 7. and a slider.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Example 1
The invention provides a broadband cantilever beam energy collecting device. As shown in fig. 1, the energy collecting device comprises a vibration source 1, a connecting part 2, a cantilever beam 3, a piezoelectric material block 4, a mass block 5, a groove 6 and a sliding block 7. The connecting part 2 is fixed on the vibration source 1, the connecting part 2 is made of copper, and the connecting part 2 is connected with the vibration source 1 through bolts. One end of the cantilever beam 3 is fixed on the connecting part 2. The cantilever beam 3 is made of aluminum alloy, silicon, semiconductor material and diamond. The block of piezoelectric material 4 is disposed on the top surface of the cantilever beam 3 near the fixed end. The block of piezoelectric material 4 is connected to an external energy harvesting circuit. The material of the piezoelectric material block 4 is piezoelectric ceramic or polyvinylidene fluoride. The mass block 5 is arranged on the top surface of the cantilever beam 3 near the free end. The mass 5 is made of aluminum alloy. Still be equipped with recess 6 on the cantilever beam 3, recess 6 is along the 3 directions of cantilever beam to sliding block 7 slides along the 3 directions of cantilever beam. The material of the sliding block 7 is metal. The sliding block 7 is at least partially arranged in the groove 6, the sliding block 7 is limited by the groove 6 and slides freely along the groove 6. The groove 6 restricts the sliding block 7 from escaping from the groove 6, and the sliding block 7 slides along the groove 6. For example, the cross-section of the groove 6 is trapezoidal, the bottom of the cross-section of the groove 6 is wide, and the top of the cross-section of the groove 6 is narrow. The section of the sliding block 7 is correspondingly set: the bottom of the section of the sliding block 7 is wide, and the top of the section of the sliding block 7 is narrow. In this way, the sliding block 7 can slide in the groove 6, but cannot escape from the groove 6.
During the application, under the drive of the vibration source 1, the connecting part 2 vibrates, the connecting part 2 drives the cantilever beam 3 to vibrate, the sliding block 7 freely moves in the groove 6, the mass distribution of the cantilever beam 3 is changed, and therefore the vibration frequency of the cantilever beam 3 is changed to match the vibration frequency of the vibration source 1, and the energy collection efficiency is improved. Because the sliding block 7 has a certain moving space in the groove 6, the invention can achieve the purpose of broadband energy collection.
Example 2
In embodiment 1, as shown in fig. 2, the slider 7 has an elliptical shape. By so doing, the contact area of sliding block 7 and the side wall of groove 6 is small, and the friction force is reduced, thereby making sliding block 7 slide in groove 6 more flexibly.
Example 3
On the basis of embodiment 2, as shown in fig. 3, the top of the sliding block 7 protrudes out of the groove 6, and the end of the groove 6 is in contact with the mass 5. In this way, when the sliding block 7 moves to the end point on the free end side of the cantilever beam 3, the sliding block 7 can contact the mass block 5 to generate force on the mass block 5, so as to press the mass block 5 to deflect towards the free end of the cantilever beam 3, further change the mass distribution of the cantilever beam 3, change the vibration frequency of the cantilever beam 3 and realize the matching with the frequency of the vibration source 1.
Furthermore, an elastic material is provided between the mass 5 and the cantilever beam 3. Therefore, when the sliding block 7 presses the mass block 5, the mass block 5 can deviate more towards the free end of the cantilever beam 3, and the mass distribution of the cantilever beam 3 is changed more, so that the vibration frequency of the cantilever beam 3 is changed, and the matching with the frequency of the vibration source 1 is realized.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A broadband cantilever beam energy harvesting device, comprising: the vibration source, the connecting part, the cantilever beam, the piezoelectric material block, the mass block, the groove and the sliding block; the connecting part is fixed on the vibration source; one end of the cantilever beam is fixed on the connecting part; the piezoelectric material block is arranged on the top surface of the cantilever beam close to the fixed end and is connected with an external energy acquisition circuit; the mass block is arranged on the top surface of the cantilever beam close to the free end; the cantilever beam is further provided with a groove, the groove is arranged along the direction of the cantilever beam, the sliding block is at least partially arranged in the groove, and the sliding block is limited by the groove and freely slides along the groove.
2. The broadband cantilever beam energy harvesting device of claim 1, wherein: the cantilever beam is made of aluminum alloy, silicon, semiconductor materials and diamond.
3. The broadband cantilever beam energy harvesting device of claim 2, wherein: the piezoelectric material block is made of piezoelectric ceramic or polyvinylidene fluoride.
4. The broadband cantilever beam energy harvesting device of claim 3, wherein: the mass block is made of aluminum alloy.
5. The broadband cantilever beam energy harvesting device of claim 4, wherein: the connecting part is connected with the vibration source through bolts, and the connecting part is made of copper.
6. The broadband cantilever beam energy harvesting device of any one of claims 1 to 5, wherein: the sliding block is made of metal.
7. The broadband cantilever beam energy harvesting device of claim 6, wherein: the shape of the sliding block is oval.
8. The broadband cantilever beam energy harvesting device of claim 7, wherein: the top of the sliding block protrudes out of the groove.
9. The broadband cantilever beam energy harvesting device of claim 8, wherein: the ends of the grooves are in contact with the mass.
10. The broadband cantilever beam energy harvesting device of claim 9, wherein: and an elastic material is also arranged between the mass block and the cantilever beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010684036.1A CN111817604A (en) | 2020-07-16 | 2020-07-16 | Broadband cantilever beam energy collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010684036.1A CN111817604A (en) | 2020-07-16 | 2020-07-16 | Broadband cantilever beam energy collecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111817604A true CN111817604A (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010684036.1A Withdrawn CN111817604A (en) | 2020-07-16 | 2020-07-16 | Broadband cantilever beam energy collecting device |
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| Country | Link |
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| CN (1) | CN111817604A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039506A (en) * | 2021-11-02 | 2022-02-11 | 上海交通大学 | Self-tuning piezoelectric energy collection device |
-
2020
- 2020-07-16 CN CN202010684036.1A patent/CN111817604A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039506A (en) * | 2021-11-02 | 2022-02-11 | 上海交通大学 | Self-tuning piezoelectric energy collection device |
| CN114039506B (en) * | 2021-11-02 | 2024-02-27 | 上海交通大学 | Self-tuning piezoelectric energy collection device |
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Application publication date: 20201023 |