CN108847784A - A kind of low-frequency vibration two degrees of freedom piezo-electricity energy harvester - Google Patents
A kind of low-frequency vibration two degrees of freedom piezo-electricity energy harvester Download PDFInfo
- Publication number
- CN108847784A CN108847784A CN201810693455.4A CN201810693455A CN108847784A CN 108847784 A CN108847784 A CN 108847784A CN 201810693455 A CN201810693455 A CN 201810693455A CN 108847784 A CN108847784 A CN 108847784A
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- stopper
- pzt
- mass block
- inner beam
- vibration
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- 230000005611 electricity Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- H02N2/183—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using impacting bodies
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The present invention discloses a kind of low-frequency vibration two degrees of freedom piezo-electricity energy harvester, and the outer beam including being in " Jiong " font, outer beam is horizontally disposed, and the first mass block is bonded at the top of the free end Wai Liang；Outer beam inner horizontal is equipped with PZT inner beam, and one end of PZT inner beam is adhered to the first mass block bottom, is bonded with the second mass block at the top of the PZT inner beam other end；The lower section of the free end Wai Liang is equipped with the first stopper, and lower section is equipped with the second stopper in the middle part of PZT inner beam, and the first stopper and the second stopper are cuboid bloom；The first stopper will be collided when the strain of outer beam is excessive, generates impact, impact can be generated again by encountering the second stopper when inner beam deformation, form two-freedom movement when being driven by extraneous vibration source；The intrinsic frequency of piezoelectric type vibration energy collecting device can be greatly lowered in peculiar structure design of the invention, improve the energy density of electricity energy harvester, can incude vibration faint in environment.
Description
Technical field
The present invention relates to micro-electromechanical device technical field, specifically a kind of low-frequency vibration two degrees of freedom piezoelectric energy acquisition dress
It sets.
Background technique
With the development for carrying out wireless sensor network, sensor node has been applied to environmental monitoring, agricultural is applied, life is strong
The fields such as health and traffic control, and node energy supply is critical issue urgently to be resolved at present.Traditional node energy-provision way is deposited
It is a kind of effective solution route by the way of environmental energy acquisition the deficiencies of capacity is small, difficult replacement.
Currently, collection of energy mode is divided into piezoelectric type, electromagnetic type and electrostatic etc., wherein piezoelectric type energy collection technique because
Structure is simple, energy density is high, it is environmental-friendly, by the advantages that electromagnetic interference be not widely used in vibration energy harvesting skill
Art.Road surface, active machine, human body of movement that vehicle crosses etc. are all vibration sources common in environment, they vibrate frequency
Rate belongs to low-frequency vibration about between 0Hz~250Hz.It therefore, should be within this range for the piezoelectric vibrator of vibration energy harvesting
Should there are multi-mode resonance frequencies or wider working band.
Traditional single-degree-of-freedom piezoelectric vibrator because its is compact-sized, it is simple due to be widely used, but it still has inherently
The deficiencies such as frequency is high, efficiency of energy collection is low.
Summary of the invention
The purpose of the present invention is to provide a kind of low-frequency vibration two degrees of freedom piezo-electricity energy harvester, the acquisition device energy
Intrinsic frequency is enough reduced, the energy density of electricity energy harvester is improved, incudes vibration faint in environment.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of low-frequency vibration two degrees of freedom piezo-electricity energy harvester, the outer beam including being in " Jiong " font, outer beam is horizontally disposed, outside
The first mass block is bonded at the top of beam free end；Outer beam inner horizontal is equipped with PZT inner beam, and one end of PZT inner beam is adhered to the
One mass block bottom is bonded with the second mass block at the top of the PZT inner beam other end；First mass block and the second mass block are length
The volume of cube bloom, the first mass block is greater than the second mass block；The lower section of the free end Wai Liang is equipped with the first stopper, in PZT
Lower section is equipped with the second stopper in the middle part of beam, and the first stopper and the second stopper are cuboid bloom；When work, first stops
The external beam free end of block, which is formed, stops cooperation, and the second stopper, which forms PZT inner beam, stops cooperation.
The invention has the advantages that the closed end of outer beam is fixed when work, outer beam is motivated by extraneous vibration source and is vibrated up and down
Beam vibration in PZT is driven, the first stopper will be collided when the strain of outer beam is excessive, generate impact, when inner beam deformation encounters second
Stopper can generate impact again, and multiple spot is caused to impact, and two-freedom movement is formed when being driven by extraneous vibration source；PZT inner beam
With piezoelectric effect, when vibration, is strained, and PZT inner beam upper and lower surface can generate potential difference, to convert electricity for mechanical energy
Energy；The output of voltage can be realized by the upper and lower surface connecting wire in PZT inner beam；First stopper and the second stopper can
According to the environment flexible setting of energy acquisition；Peculiar structure design of the invention can be greatly lowered piezoelectric type vibration energy and adopt
The intrinsic frequency of storage improves the energy density of electricity energy harvester, can incude vibration faint in environment.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples：
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is front view of the invention；
Fig. 3 is top view of the invention.
Specific embodiment
In conjunction with shown in Fig. 1~3, the present invention provides a kind of low-frequency vibration two degrees of freedom piezo-electricity energy harvester, including is in
The outer beam 1 of " Jiong " font, outer beam 1 is horizontally disposed, and the open end of outer beam 1 is free end, and the closed end of outer beam 1 is fixing end, outside
The first mass block 2 is bonded at the top of 1 free end of beam；Outer 1 inner horizontal of beam is equipped with PZT inner beam 3, and one end of PZT inner beam 3 is bonded
The second mass block 4 is bonded at the top of 2 bottom of the first mass block, 3 other end of PZT inner beam；First mass block 2 and the second mass
Block 4 is cuboid bloom, and the volume of the first mass block 2 is greater than the second mass block 4；PZT inner beam 3 connects the first mass block 2
One end is fixing end, and one end that PZT inner beam 3 connects the second mass block 4 is free end；The lower section of outer 1 free end of beam is equipped with first
Stopper 5,3 middle part lower section of PZT inner beam are equipped with the second stopper 6, and the first stopper 5 and the second stopper 6 are cuboid steel
Block；When work, the external beam free end of the first stopper 5, which is formed, stops cooperation, and the second stopper 6, which forms PZT inner beam, to stop to match
It closes.
The free end of outer beam 1 and PZT inner beam 3 is attached with the first mass block 2 and the second mass block 4 respectively, and outer beam is closed
End is fixing end；When work, the closed end of outer beam 1 is fixed, and outer beam 1, which is motivated to vibrate up and down by extraneous vibration source, drives PZT inner beam 3 to shake
It is dynamic, when outer beam 1 strain it is excessive will collide the first stopper 5, generate impact, encountering the second stopper 6 when the deformation of inner beam 3 can again
Secondary generation impact, causes multiple spot to impact, and two-freedom movement is formed when being driven by extraneous vibration source；PZT inner beam 3 is imitated with piezoelectricity
It answers, when vibration strains, and 3 upper and lower surface of PZT inner beam can generate potential difference, to convert electric energy for mechanical energy；It can pass through
The first conducting wire 7a, the second conducting wire 7b of lower surface connection are connected in the upper surface of PZT inner beam, realizes the output of voltage；First stops
The free end of block and outer beam is there are gap, and there are gaps with PZT inner beam for the second stopper, and the first stopper and the second stopper can
It is fixed according to the varying environment flexible setting of energy acquisition；The sheet body that the first stopper of the present embodiment uses with a thickness of 1mm, and water
The inner side edge edge of safety dress, the first stopper is concordant with the inner side edge of the first mass block 2 edge, and the second stopper of the present embodiment is vertical
Installation.The intrinsic frequency of piezoelectric type vibration energy collecting device can be greatly lowered in peculiar structure design of the invention, improve energy
The energy density of acquisition device is measured, entire electricity energy harvester is small in size, generating efficiency is high, and working frequency is low, is implanted electricity
The power supply of sub- equipment and wireless sensor provides a kind of effective way.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form；Appoint
What those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the side of the disclosure above
Method and technology contents make many possible changes and modifications to technical solution of the present invention, or are revised as the equivalent reality of equivalent variations
Apply example.Therefore, anything that does not depart from the technical scheme of the invention according to the technical essence of the invention do above embodiments
Any simple modification, equivalent replacement, equivalence changes and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (1)
1. a kind of low-frequency vibration two degrees of freedom piezo-electricity energy harvester, which is characterized in that the outer beam including being in " Jiong " font, outside
Beam is horizontally disposed, and the first mass block is bonded at the top of the free end Wai Liang；Outer beam inner horizontal is equipped with PZT inner beam, PZT inner beam
One end is adhered to the first mass block bottom, is bonded with the second mass block at the top of the PZT inner beam other end；First mass block and second
Mass block is cuboid bloom, and the volume of the first mass block is greater than the second mass block；The lower section of the free end Wai Liang is equipped with first
Stopper, PZT inner beam middle part lower section are equipped with the second stopper, and the first stopper and the second stopper are cuboid bloom；Work
When making, the external beam free end of the first stopper, which is formed, stops cooperation, and the second stopper, which forms PZT inner beam, stops cooperation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810693455.4A CN108847784A (en) | 2018-06-29 | 2018-06-29 | A kind of low-frequency vibration two degrees of freedom piezo-electricity energy harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810693455.4A CN108847784A (en) | 2018-06-29 | 2018-06-29 | A kind of low-frequency vibration two degrees of freedom piezo-electricity energy harvester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108847784A true CN108847784A (en) | 2018-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810693455.4A Pending CN108847784A (en) | 2018-06-29 | 2018-06-29 | A kind of low-frequency vibration two degrees of freedom piezo-electricity energy harvester |
Country Status (1)
| Country | Link |
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| CN (1) | CN108847784A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204103801U (en) * | 2014-09-05 | 2015-01-14 | 苏州大学 | A kind of raising frequency formula vibrational energy acquisition system |
| CN205070840U (en) * | 2015-10-27 | 2016-03-02 | 南昌工程学院 | Piezoelectricity - triboelectric combined type MEMS wide band energy gatherer |
-
2018
- 2018-06-29 CN CN201810693455.4A patent/CN108847784A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204103801U (en) * | 2014-09-05 | 2015-01-14 | 苏州大学 | A kind of raising frequency formula vibrational energy acquisition system |
| CN205070840U (en) * | 2015-10-27 | 2016-03-02 | 南昌工程学院 | Piezoelectricity - triboelectric combined type MEMS wide band energy gatherer |
Non-Patent Citations (1)
| Title |
|---|
| 王海等: "基于波纹梁的两自由度低频振动能量收集装置", 《吉林大学学报（工学版）》 * |
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Application publication date: 20181120 |
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