CN109713771A - Portable equipment self-power supply system based on piezo-electric generating - Google Patents
Portable equipment self-power supply system based on piezo-electric generating Download PDFInfo
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- CN109713771A CN109713771A CN201910112440.9A CN201910112440A CN109713771A CN 109713771 A CN109713771 A CN 109713771A CN 201910112440 A CN201910112440 A CN 201910112440A CN 109713771 A CN109713771 A CN 109713771A
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- monocrystalline piezoelectric
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
Vibrational energy in environment is converted to electric energy and successively exported after current rectifying and wave filtering circuit, electricity collection and memory module, boosting Voltage stabilizing module and stablizes 5V direct current and supply electricity to the power supply of power consumption portable equipment by the present invention relates to a kind of portable equipment self-power supply system based on piezo-electric generating, the beam type monocrystalline piezoelectric oscillator that generates electricity.Mass block is arranged in beam type monocrystalline piezoelectric power generation oscillator free end, is greatly reduced the intrinsic frequency of oscillator, can preferably adapt to low-frequency ambient vibrations, and then improves the output electric energy of beam type monocrystalline piezoelectric power generation oscillator；The super low-power consumption chip BQ25504 that the electric energy management chip of electricity collection and memory module uses, cold start-up voltage is only 330mV, and the electric energy for the oscillator generation that can be generated electricity with persistent collection beam type monocrystalline piezoelectric is simultaneously stored in super capacitor；The Voltage stabilizing module that boosts uses super low-power consumption chip TPS61020, and boost conversion efficiency is up to 95%, the voltage in super capacitor can be risen to 5V, and then provide stable electric energy for low-power consumption portable equipment.
Description
Technical field
The present invention relates to a kind of power supply unit, in particular to a kind of portable equipment self-power supply system based on piezo-electric generating.
Background technique
It is portable with the fast development of MEMS (Micro-Electro-Mechanical-System, MEMS)
Low power dissipation electron product is widely applied.But current portable equipment relies primarily on traditional chemical cell energy supply, body
Product is unfavorable for integrating greatly, restricted lifetime need to regularly replace and manufacture and use process and will cause the problems such as environmental pollution,
There is an urgent need to the micro- energy of green of sustainable power supply.
In recent years, the renewable energy such as solar energy, wind energy, sound energy, ambient vibration energy and thermal gradient energy are by more and more
Concern.Wherein, the vibrational energy being widely present in the environment is not influenced by ambient temperature and illumination length, and energy harvesting continues surely
It is fixed, it is the potential alternative energy source of the traditional chemicals system such as lithium battery.Ambient vibration can be based on the modes such as piezoelectricity, electrostatic and electromagnetism
Acquisition, since piezoelectric type energy obtains, structure is simple, is easy to be miniaturized and integrate, and energy transition density is big, application prospect ten
Divide wide.
Summary of the invention
The present invention be directed to traditional chemical battery be portable equipment power there are the problem of, propose and a kind of sent out based on piezoelectricity
The portable equipment self-power supply system of electricity, using beam type monocrystalline piezoelectric power generation oscillator, energy acquisition and storage circuit and boosting
Voltage regulator circuit is connected to form micro-system as portable equipment power supply, can meet the self energizing power demands of low power dissipation electron product.
The technical solution of the present invention is as follows: a kind of portable equipment self-power supply system based on piezo-electric generating, including beam type
Monocrystalline piezoelectric power generation oscillator, current rectifying and wave filtering circuit, electricity collection and memory module and boosting Voltage stabilizing module, beam type monocrystalline
After vibrational energy in environment is converted to electric energy feeding current rectifying and wave filtering circuit by piezo-electric generating oscillator, output direct current enters electric energy receipts
Collection and memory module, the electric energy that low electricity collection is stored with energy-storage travelling wave tube in memory module exports after the Voltage stabilizing module that boosts to be given
The power supply of power consumption portable equipment；
Beam type monocrystalline piezoelectric power generation oscillator includes metallic elastic matrix, piezo-electric crystal, mass block, and piezo-electric crystal covers entirely
It is placed on elastic matrix；Mass block is placed in piezo-electric crystal one end on piezo-electric crystal；Elastic matrix, piezo-electric crystal and mass block
It is pasted together by conducting resinl, forms monocrystalline piezoelectric oscillator；Monocrystalline piezoelectric oscillator one end is fixed, and the other end is hanging, and matter
Gauge block constitutes beam type monocrystalline piezoelectric power generation oscillator in free end.
The electricity collection and storage circuit are by super low-power consumption electric energy management chip BQ25504 and capacitor, inductance and resistance
Composition, the electricity greater than 80mV that chip BQ25504 persistent collection beam type monocrystalline piezoelectric power generation oscillator provides send super capacitor
Storage.
Shown boosting Voltage stabilizing module is mainly made of chip TPS61020 and capacitor, inductance and resistance, and output 5V stablizes electricity
Piezoelectricity.
The beneficial effects of the present invention are: the present invention is based on the portable equipment self-power supply system of piezo-electric generating, beam types
Mass block is arranged in monocrystalline piezoelectric power generation oscillator free end, is greatly reduced the intrinsic frequency of oscillator, can preferably adapt to low
Frequency ambient vibration, and then improve the output electric energy of beam type monocrystalline piezoelectric power generation oscillator；Electricity collection and memory module
The super low-power consumption chip BQ25504 that electric energy management chip uses, cold start-up voltage is only 330mV, can be with persistent collection cantilever beam
The electric energy of formula monocrystalline piezoelectric power generation oscillator generation is simultaneously stored in memory element super capacitor；The Voltage stabilizing module that boosts uses ultralow function
Chip TPS61020 is consumed, boost conversion efficiency is up to 95%, the voltage in super capacitor can be risen to 5V, and then just for low-power consumption
It takes equipment and stable electric energy is provided.
Detailed description of the invention
Fig. 1 is portable equipment piezoelectric self-power supplied system construction drawing of the present invention；
Fig. 2 is beam type monocrystalline piezoelectric of the present invention power generation oscillator structure schematic diagram；
Fig. 3 is the artificial circuit figure of current rectifying and wave filtering circuit of the present invention, electricity collection and memory module；
Fig. 4 is the artificial circuit figure of present invention boosting Voltage stabilizing module；
Fig. 5 is the simulation result diagram of present invention boosting Voltage stabilizing module.
Specific embodiment
Portable equipment piezoelectric self-power supplied system construction drawing as shown in Figure 1, system include the power generation vibration of beam type monocrystalline piezoelectric
Son, current rectifying and wave filtering circuit, electricity collection and memory module and boosting Voltage stabilizing module.
Beam type monocrystalline piezoelectric power generation oscillator structure schematic diagram as shown in Figure 2, beam type monocrystalline piezoelectric power generation oscillator
Including metallic elastic matrix 3, piezo-electric crystal 2 and mass block 1,2 all standing of piezo-electric crystal is used for general on elastic matrix 3
Vibrational energy in environment is converted to electric energy；The rigidity of the elastic matrix 3 is big compared with the rigidity of piezo-electric crystal 2, is used to support described
Piezo-electric crystal 2；Mass block 1 is placed in piezo-electric crystal one end on piezo-electric crystal 2, for reducing the intrinsic frequency of device, with suitable
The low-frequency vibration of environment is answered, and when piezoelectric vibrator and ambient vibration generate resonance, the voltage of piezoelectric vibrator conversion is maximum；Elasticity
Matrix 3, piezo-electric crystal 2 and mass block 1 are pasted together by conducting resinl, form monocrystalline piezoelectric oscillator；Monocrystalline piezoelectric oscillator one
End is fixed, and the other end is hanging, and mass block 1 constitutes beam type monocrystalline piezoelectric power generation oscillator in free end.
In the present invention, the size of beam type monocrystalline piezoelectric power generation oscillator use are as follows: piezo-electric crystal length and width, thickness are respectively
3000 μm, 500 μm and 4 μm, elastic matrix length and width, thickness are respectively 3000 μm, 500 μm and 10 μm, and mass block length is generous to be respectively
1000 μm, 500 μm and 500 μm, institute's output voltage is 640mA, intrinsic frequency 127Hz.
The artificial circuit figure of current rectifying and wave filtering circuit, electricity collection and memory module as shown in Figure 3, the current rectifying and wave filtering circuit
It is connected using full bridge rectifier, and with beam type monocrystalline piezoelectric power generation oscillator, is used for the beam type pressure
The alternating voltage of electric tachometer indicator output is converted to steady dc voltage；Electricity collection and storage circuit are for sufficiently collecting and storing
The electric energy of piezoelectric vibrator conversion；It is stored after the rectified filtering of alternating voltage of the beam type monocrystalline piezoelectric power generation oscillator output
In the memory element of the electricity collection and storage circuit.Wherein, electricity collection and storage circuit are by super low-power consumption electric energy pipe
Chip BQ25504 and capacitor, inductance and resistance composition are managed, the cold start-up voltage of super low-power consumption electric energy management chip BQ25504 is only
For 330mV, after circuit conducting, chip BQ25504 is sustainable to collect being greater than for beam type monocrystalline piezoelectric power generation oscillator offer
The electricity of 80mV；Energy-storage travelling wave tube is super capacitor, and the voltage and current by observing super capacitor both ends changes, it may be determined that super electricity
The storage state of appearance: being circuit to super capacitor charged state, i.e., super electricity when electric current constantly changes and voltage constantly increases
Hold constantly storage electric energy, when current value is 0 and voltage value tends towards stability, is full of electricity condition for super capacitor, i.e. storage electric energy
It completes, and then can ensure that and the electric energy of firm power is provided when portable equipment needs.
The voltage rating of most of portable equipments is 5V, the artificial circuit figure for the Voltage stabilizing module that boosts as shown in Figure 4, and boosting is steady
Die block is mainly made of chip TPS61020 and capacitor, inductance and resistance.The boosting pressure stabilizing is received for optimizing the electric energy
The output voltage of collection and memory module, and then enough electric energy are provided for low-power consumption portable equipment.
The simulation result diagram of boosting Voltage stabilizing module as shown in Figure 5, is shown by the simulation result that boosting Voltage stabilizing module obtains: should
The response of voltage boosting and stabilizing circuit is very rapid, to during about 100 μ s since energy conversion, output voltage Vout and output electric current
Iout is in steady state, and during from 100 μ s to 250 μ s, output voltage Vout and output electric current Iout are continuous at any time
Increase, hereafter, voltage and current tends towards stability, and is kept at 5V and 0.415A, and stablizing output power P is 2.075W, in ring
Under border vibrational excitation effect, beam type monocrystalline piezoelectric power generation oscillator can be power electronic equipment with sustained vibration and constantly,
And then realize self energizing.
The description of the above specific embodiment has been done further in detail to the purpose of the present invention, summary of the invention and beneficial to benefit
It describes in detail bright.But the invention is not limited to the specific embodiment, all modification and improvement done on the basis of the present invention should all be wrapped
Containing within protection scope of the present invention.
Claims (3)
1. a kind of portable equipment self-power supply system based on piezo-electric generating, which is characterized in that sent out including beam type monocrystalline piezoelectric
Electric tachometer indicator, current rectifying and wave filtering circuit, electricity collection and memory module and boosting Voltage stabilizing module, the power generation vibration of beam type monocrystalline piezoelectric
After vibrational energy in environment is converted to electric energy feeding current rectifying and wave filtering circuit by son, output direct current enters electricity collection and storage mould
Block, the electric energy that low electricity collection is stored with energy-storage travelling wave tube in memory module exports after the Voltage stabilizing module that boosts to be set to power consumption is portable
Available electricity；
Beam type monocrystalline piezoelectric power generation oscillator includes metallic elastic matrix, piezo-electric crystal, mass block, piezo-electric crystal all standing in
On elastic matrix；Mass block is placed in piezo-electric crystal one end on piezo-electric crystal；Elastic matrix, piezo-electric crystal and mass block pass through
Conducting resinl is pasted together, and forms monocrystalline piezoelectric oscillator；Monocrystalline piezoelectric oscillator one end is fixed, and the other end is hanging, and mass block
In free end, beam type monocrystalline piezoelectric power generation oscillator is constituted.
2. the portable equipment self-power supply system based on piezo-electric generating according to claim 1, which is characterized in that the electric energy is received
Collection and storage circuit are made of super low-power consumption electric energy management chip BQ25504 and capacitor, inductance and resistance, and chip BQ25504 is held
The continuous electricity greater than 80mV for collecting the power generation oscillator offer of beam type monocrystalline piezoelectric send super capacitor to store.
3. the portable equipment self-power supply system based on piezo-electric generating according to claim 1, which is characterized in that shown boosting is steady
Die block is mainly made of chip TPS61020 and capacitor, inductance and resistance, output 5V burning voltage power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910112440.9A CN109713771A (en) | 2019-02-13 | 2019-02-13 | Portable equipment self-power supply system based on piezo-electric generating |
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| CN201910112440.9A CN109713771A (en) | 2019-02-13 | 2019-02-13 | Portable equipment self-power supply system based on piezo-electric generating |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417294A (en) * | 2019-08-15 | 2019-11-05 | 合肥工业大学 | A kind of piezoelectric energy collection system and its method with cold start function |
| CN112078804A (en) * | 2019-06-12 | 2020-12-15 | 张毅 | Karman resonance nanowire crystal piezoelectric unmanned aerial vehicle range-extending power supply |
| CN112781699A (en) * | 2020-12-28 | 2021-05-11 | 杭州电子科技大学 | Dynamic weighing device based on multi-cantilever structure and weighing method thereof |
| CN113992058A (en) * | 2021-10-19 | 2022-01-28 | 浙江中控技术股份有限公司 | Self-generating system, device and method for collecting vibration energy of rotating equipment |
| CN114327094A (en) * | 2021-11-23 | 2022-04-12 | 合肥工业大学 | Self-powered PPT pen |
| CN112078804B (en) * | 2019-06-12 | 2024-04-26 | 张毅 | Karman resonance nanowire crystal piezoelectric unmanned aerial vehicle Cheng Dianyuan |
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| CN112078804A (en) * | 2019-06-12 | 2020-12-15 | 张毅 | Karman resonance nanowire crystal piezoelectric unmanned aerial vehicle range-extending power supply |
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| CN112781699B (en) * | 2020-12-28 | 2022-05-17 | 杭州电子科技大学 | Dynamic weighing device based on multi-cantilever structure and weighing method thereof |
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| CN114327094A (en) * | 2021-11-23 | 2022-04-12 | 合肥工业大学 | Self-powered PPT pen |
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