CN203352480U - Piezoelectric power generator - Google Patents
Piezoelectric power generator Download PDFInfo
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- CN203352480U CN203352480U CN 201320147010 CN201320147010U CN203352480U CN 203352480 U CN203352480 U CN 203352480U CN 201320147010 CN201320147010 CN 201320147010 CN 201320147010 U CN201320147010 U CN 201320147010U CN 203352480 U CN203352480 U CN 203352480U
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Abstract
The utility model discloses a piezoelectric power generator which comprises piezoelectric ceramics and a metal casing symmetrically bounded on the upper and lower surfaces of the piezoelectric ceramics, wherein the metal casing has a variable cross section, the central section of the metal casing is relatively thin, and the portion next to the piezoelectric ceramics bonding part is relatively thick. In this way, the piezoelectric power generator can be placed under a pavement to bear great axle load of vehicles from the pavement. The piezoelectric power generator is high in rigidity, high in energy conversion efficiency, and long in service lifetime.
Description
Technical field
The utility model relates to energy technology field, particularly relates to a kind of piezoelectric generating device.
Background technology
Along with portability electronic device and the radio sensing network fast development of decades in the past, rely on traditional electrochemical cell to provide energy to have many drawbacks.Along with the high speed development of complex digital system integrated technology, microelectronic component is reducing aspect size and energy consumption greatly, yet the power supply of these devices becomes one of bottleneck of its development because volume is larger.And battery is bulky for microelectronic component, the life-span is short, chemical toxicity is seriously polluted, and need periodic replacement, this is provided the wireless senser of energy to bring a lot of inconvenience and financial burden in remote needs for a long time; Especially for the electronic system be embedded in clothes, human body and animal body, changing battery is difficult or even impossible thing.Therefore, in order to obtain the self-powered system of long-term even unlimited life cycle, from surrounding environment, harvest energy is to the electronic device power supply in various countries researcher research, and purpose is to replace the radio sensing network power supply that conventional batteries is MEMS and low-power consumption.One or more of the energy that surrounding environment is existed (comprising heat energy, wind energy, acoustic energy, water energy, solar energy, electromagnetic wave, light, mechanical vibrational energy and mankind's activity energy etc.) collect and convert electric energy to, then directly to electronic device, power or be stored in the energy storage devices such as capacitor, ultracapacitor or chargeable battery, this process is collection of energy.From various energy sources, the method for harvest energy has three classes such as electromagnetic type, electrostatic and piezoelectric type.With other electricity generating principle, compare, that piezo-electric generating has is simple in structure, do not generate heat, without electromagnetic interference, pollution-free and be easy to realize the microminiaturization of mechanism, the plurality of advantages such as integrated, and can meet the energy supply demand of this type of low power consuming product.
What in the piezo-electric generating field, use at present was more is beam type piezoelectric generating device, Moonie type and Cymbal type piezoelectric generating device.From current research, the beam type piezoelectric generating device has low frequency, energy conversion efficiency advantages of higher, but its bearing capacity is limited, easily fracture under large effect of stress.Moonie type piezoelectric generating device bonding and making are simple, but its tack coat edge produces larger stress because thickness is excessive, concentrate, and affect energy conversion efficiency.Cymbal type piezoelectric generating device is compared the beam type bearing capacity and is increased, and flexural deformation is larger, applies more extensive.Cymbal type piezoelectric generating device is due to its convex structure and thin metal end caps structure, so its voltage endurance capability is limited, and when pressure is excessive, permanent deformation will occur metal end caps, and cavity subsides and lost efficacy.Therefore under some large stress environments for use, just need to seek a kind of piezoelectric generating device that can bear larger load and higher electrical generation efficiency is arranged.
The utility model content
The technical problem that the utility model mainly solves is to provide a kind of piezoelectric generating device, can be placed under road surface, bears the axle larger from road vehicles and carries effect, and rigidity is better, and energy conversion efficiency is higher, long service life.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of piezoelectric generating device is provided, comprise: piezoelectric ceramic and the symmetrical metal shell that is bonded in the piezoelectric ceramic upper and lower surface, described metal shell is the variable cross-section shape, the metal shell middle part is thinner, near thicker with described piezoelectric ceramic bonding part.
Preferably, described metal shell is bonded together by epoxy resin and described piezoelectric ceramic.
The beneficial effects of the utility model are: the utility model can be placed under road surface, bears the axle larger from road vehicles and carries effect, and rigidity is better, and energy conversion efficiency is higher, long service life.
The accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of a kind of piezoelectric generating device of the utility model;
Fig. 2 be shown in a kind of A-A schematic cross-section of piezoelectric generating device;
In accompanying drawing, the mark of each parts is as follows: 1, metal shell; 2, piezoelectric ceramic.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that, protection range of the present utility model is made to more explicit defining.
Refer to Fig. 1 and Fig. 2, the utility model embodiment comprises:
A kind of piezoelectric generating device, comprise: piezoelectric ceramic 2 and be bonded in the metal shell 1 of piezoelectric ceramic 2 upper and lower surfaces by the epoxy resin symmetry, described metal shell 1 is the variable cross-section shape, and metal shell 1 middle part is thinner, near thicker with described piezoelectric ceramic 2 bonding parts.Reduce its thickness on the one hand, also make its thickness along radially changing continuously, the stress of corresponding minimizing and piezoelectric ceramic 2 bond edge, can also improve the ratio that metal shell 1 axial vibration displacement is converted to the radial vibration displacement simultaneously.
The repeated action that axle for vehicle carries in use will be born in road surface, thereby produces stress, strain and vibration to a certain degree.The direct piezoelectric effect of piezoelectric is subject to exactly external force and produces while being out of shape, can cause material internal positive and negative charge center that relative displacement occurs and produce electric polarization, thereby cause the bound charge that symbol is contrary occurring on two surfaces of material, can change into electric energy to mechanical energy.The utility model is placed under road surface, bears the axle larger from road vehicles and carries effect, and rigidity is better, and energy conversion efficiency is higher, long service life.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (2)
1. a piezoelectric generating device, it is characterized in that, comprise: piezoelectric ceramic (2) and symmetry are bonded in the metal shell (1) of piezoelectric ceramic (2) upper and lower surface, described metal shell (1) is the variable cross-section shape, metal shell (1) middle part is thinner, near thicker with described piezoelectric ceramic (2) bonding part.
2. a kind of piezoelectric generating device according to claim 1, it is characterized in that: described metal shell (1) is bonded together by epoxy resin and described piezoelectric ceramic (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320147010 CN203352480U (en) | 2013-03-27 | 2013-03-27 | Piezoelectric power generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320147010 CN203352480U (en) | 2013-03-27 | 2013-03-27 | Piezoelectric power generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203352480U true CN203352480U (en) | 2013-12-18 |
Family
ID=49752327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320147010 Expired - Fee Related CN203352480U (en) | 2013-03-27 | 2013-03-27 | Piezoelectric power generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203352480U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138627A (en) * | 2013-03-27 | 2013-06-05 | 苏州市职业大学 | Bridge-arch-shaped piezoelectric power generation device |
-
2013
- 2013-03-27 CN CN 201320147010 patent/CN203352480U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138627A (en) * | 2013-03-27 | 2013-06-05 | 苏州市职业大学 | Bridge-arch-shaped piezoelectric power generation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20140327 |