CN105811803B - A kind of fluid oscillation energy collecting device based on piezoelectric material - Google Patents

A kind of fluid oscillation energy collecting device based on piezoelectric material Download PDF

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Publication number
CN105811803B
CN105811803B CN201610151728.3A CN201610151728A CN105811803B CN 105811803 B CN105811803 B CN 105811803B CN 201610151728 A CN201610151728 A CN 201610151728A CN 105811803 B CN105811803 B CN 105811803B
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China
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container
piezoelectric
energy
circuit
conversion piece
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CN201610151728.3A
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Chinese (zh)
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CN105811803A (en
Inventor
白雪
潘祎雯
赵文祥
徐雷钧
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江苏大学
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00Electric machines in general using piezo-electric effect, electrostriction or magnetostriction
    • H02N2/18Electric machines in general using piezo-electric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
    • H02N2/185Electric machines in general using piezo-electric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams

Abstract

The invention discloses a kind of fluid oscillation energy collecting device based on piezoelectric material, including the first container, second container;The first container, second container are cuboid or cylinder;Second container is sleeved in the first container;The several transducing circuits being placed on pcb board are equipped between the first container and second container, the upper and lower end face sealing between the first container and second container;Several sockets are provided on the inside of second container, piezoelectric energy-conversion piece one end is fixed in socket, the extension of piezoelectric energy-conversion piece other end horizontal direction second container center;Piezoelectric energy-conversion piece includes piezoelectric ceramics and substrate, and piezoelectric ceramics is connected by picking out circuit with transducing circuit anode, and substrate is connected by picking out circuit with transducing circuit negative terminal;Transducing circuits present is identical with piezoelectric energy-conversion piece number and corresponding connection one by one.The device realizes the collecting effect that wideband improves energy according to the different length shapes structure of piezoelectric energy-conversion piece and position relationship.

Description

A kind of fluid oscillation energy collecting device based on piezoelectric material
Technical field
The invention belongs to vibration energy harvesting field more particularly to a kind of fluid oscillation energy receipts based on piezoelectric material Acquisition means.
Background technology
Piezoelectric material can generate charge this phenomenon and have been found to decades under the effect of external force, but be subject to This Partial charge is collected, stores the power supply research as driving micropower electric appliance by the limitation of piezoelectric material generating capacity Always seldom.In recent years, the use of highly integrated low power dissipation electron element and radio frequency technology is piezoelectric energy collection technique Application provide premise.And the power consumption of sensor, microprocessor and radio-frequency devices constantly reduces, and system capacity revenue and expenditure is gradual It tends to balance, miniature environment energy collection technology becomes research hotspot both domestic and external again.
Energy gathering apparatus can be divided into electromagnetic type, piezoelectric type and three kinds electrostatic.Electromagnetic type device is based on electromagnetism sense Principle is answered to generate induction electric energy using sectioned coil during magnet vibration, is generated electricity available for human body vibration energy capture and micro-vibration, But there is the defects of complicated, volume is larger.Electrostatic conversion can directly generate 2V to a few volt voltages, can with it is micro electronmechanical System combines, but electrostatic conversion needs an independent voltage source initialization transfer process.The operation principle of piezo-electric device is Using piezoelectric material electric field can be generated in the case where being deformed upon formation internal stress by external mechanical effect.It is simple in structure, no Fever, without minimizing in electromagnetic interference, making easy to process and realization structure, integrated etc., be particularly suitable for all kinds of sensings And detecting system.So piezoelectric type vibration energy collecting device is optimal selection.Piezoelectric energy collection research is in Japan and America and Europe Countries is waited to start, and comparison is early, and the domestic research to piezo-electric generating is still in the primary stage.
Early in 1984, PVDF thin slices were placed on organism by American science circle Hausler and Stein, with organism Energy caused by rib cage stretching exercise is as Research foundation during breathing, and the energy that by biological motion when generates is converted to electric energy. This is the starting point that feasibility study is collected on piezoelectric energy.
1996, Japanese Scientists studied piezoelectric type energy acquisition equipment transformation efficiency.Experimental provision is by one A steel ball and freely-supported beam type piezoelectric ceramic plate composition, steel ball hit piezoelectric ceramic plate, bring it about flexural deformation and send electric signal, Test influence of many factors of piezoceramic material to piezoelectric ceramics generating efficiency.This is to collect conversion effect on piezoelectric energy The research of rate.
1997, same Japanese Scientists tested the piezoelectric energy storing mode using capacitance as storing media.Test It was found that piezoelectric vibrator output charge amount increases with the increase of external storage capacitors value, while also with piezoelectric vibrator duration of oscillation Increase and increase.The maximum conversion efficiency of piezoelectric energy-conversion element is 35% in this experiment, is the three of conversion efficiency of solar cell Times.
At home, 2002, Nanjing Aero-Space University Sun Ya flew et al. by being stored in when piezoelectric actuator is shunk Energy in its electric field and strain field, the system formed by temporary charge reservoir device realize the recycling and utilization of charge.2011, Horse Huaan of Shanghai Communications University et al. devise the piezoelectric vibration energy based on environmental energy acquisition send harvester can be with Widen the working band of 5Hz, but still using cantilever beam form, when ambient vibration direction is different from overarm arm direction of vibration, Deformation is drastically reduced, and use scope is limited.
Country's piezoelectric material is chiefly used in transformer, energy converter, wave filter, ultrasonic vibrator etc. now, and uses piezoelectric material It is also rarely found at home to do power generation and collection of energy.In conclusion currently to the research and development of piezoelectric energy collection system just In the state of rise, market is in the starting stage, therefore either from technology or market angle, this field will have in future There are very big development and the rising space.
The operation principle of piezo-electric device is to be deformed upon using piezoelectric material by external mechanical effect, forms internal stress In the case of can generate electric field;In the prior art, piezoelectric energy-conversion piece vibration energy harvesting field is asked there are vibration frequency is single Topic, this causes vibration frequency that ought be in the environment to be not easy that intrinsic frequency is not achieved, and piezoelectric energy-conversion piece output electricity effect is poor.In order to Solve the problems, such as this, and the place that piezoelectric patches is used is widened, and energy can be collected among air and current, according to sky Piezoelectric energy-conversion piece is combined together by the difference of gas velocity, flow rate of water flow according to certain length shapes structure and position relationship So as to design a kind of energy gathering apparatus.
The content of the invention
It is an object of the invention to provide a kind of fluid oscillation energy collecting device based on piezoelectric material, the device according to The different length shapes structure of piezoelectric energy-conversion piece and position relationship combine, and the collecting effect of energy is promoted so as to fulfill widebandization, The device can have the place of the place or wind flow of current greatly to collect electric energy in the environment at any time.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of fluid oscillation energy collecting device based on piezoelectric material, including the first container, second container;Described first Container, second container are cuboid or cylinder;The first container, second container are contour and are hollow structure, and second holds Device is sleeved in the first container;The several transducing circuits being placed on pcb board are equipped between the first container and second container, first holds Upper and lower end face sealing between device and second container;Several sockets are provided on the inside of the second container, piezoelectric energy-conversion piece one end is consolidated It is scheduled in socket, the extension of piezoelectric energy-conversion piece other end horizontal direction second container center;The piezoelectric energy-conversion piece includes piezoelectric ceramics And substrate, piezoelectric ceramics are connected by picking out circuit with transducing circuit anode, substrate is by picking out circuit and transducing circuit negative terminal It is connected;The transducing circuits present is identical with piezoelectric energy-conversion piece number and corresponding connection one by one.
Further, the piezoelectric energy-conversion piece is in array distribution from top to bottom;Piezoelectric energy-conversion leaf length arranges from short to long, Piezoelectric energy-conversion piece number is n, and as n < 10, n-th ratio (n-1) leaf length increases by 10%;Work as n<When 20, n-th than (n- 1) leaf length increases by 5%;And the maximum length of piezoelectric energy-conversion piece is no more than the cuboid length of side in this direction or piezoelectric energy-conversion The maximum length of piece is not more than the diameter of cylinder.
Further, the first container, the material of second container are organic glass;It is upper between the first container and second container Lower face bonds organic glass capsulation by glass cement.
Further, transducing circuit is two voltage doubling rectifying circuit.
Further, transducing circuit is that the alternating current that piezoelectric energy-conversion piece is collected into is carried out rectification by rectification circuit, so It after post filtering circuit filtering, boosts by charge pump circuit to voltage, finally by the circuit output after boosting.
Further, the clock signal of charge pump circuit is provided by oscillating circuit.
Further, piezoelectric ceramics is optional piezoelectric ceramics PZT.
Further, piezoelectric energy-conversion piece one end is fixed on by glass cement in socket.
Advantageous effect:
1. the present invention can be put in such as hand washing sink in the sink, the flow energy that sewer is flowed into pond is converted For electric energy, achieve the effect that an energy regeneration utilizes, economize on resources.
2. wind energy can be collected when being placed on the outdoor place (air outlet of such as air-conditioning) for having wind to blow, electricity is converted wind energy into Can, the power supply of electron equipment.
3. cuboid or cylinder vibrational energy collection device greatly reduce the physical size of the device, space is saved, The field of vibrational energy collection has been widened, and has been had the characteristics that portable.
4. the arrangement piezoelectric energy-conversion piece of piezoelectric energy-conversion piece is in array distribution from top to bottom;Piezoelectric energy-conversion leaf length is from short to long Arrangement is beneficial to the collection to fluid vibrational energy.
5. the length and width of piezoelectric energy-conversion piece is the same, length increases successively from top to bottom, the piezoelectric patches of different length is In order to improve the working band width of whole system, can be reached under different current (air-flow) velocity conditions beneficial to whole system To resonant frequency, the absorption for realizing vibrational energy wideband improves power output.
6. entire transducing circuit and energy-storage travelling wave tube are placed between the first container, second container, inside is taken full advantage of Space, the volume of whole system, while the sealed device in upper and lower end face between the first container, second container is greatly saved, Good isolation is played, entire circuit will not intake, and play the effect of a security and convenience, and whole system can be with Body carries.
7. the electricity that the electric current that piezoelectric energy-conversion piece is collected into exports rectification circuit by the rectification of rectification circuit, filter circuit Stream is filtered, so that waveform is more smooth, is boosted finally by charge pump to booster circuit to voltage value, so as to To the power supply of suitable application.
Description of the drawings
Fig. 1 cuboid energy gathering apparatus schematic diagrames;
Fig. 2 piezoelectric energy-conversion piece side views;
Fig. 3 cylindrical shape energy gathering apparatus schematic diagrames;
The single two voltage doubling rectifying circuit figures of Fig. 4;
Fig. 5 transducing circuit diagrams;
Fig. 6 piezoelectric energy-conversion circuit block diagrams.
Reference numeral represents as follows:
1- piezoelectric ceramics;2- substrates;3- sockets;4- second containers;5- the first containers;6- transducing circuits;7- diodes;8- Storage capacitor;9- fluids;10- piezoelectric energy-conversion pieces.
Specific embodiment
With reference to attached drawing, a kind of fluid oscillation energy collecting device based on piezoelectric material holds including the first container 5, second Device 4;The first container 5, second container 4 are cuboid or cylinder;The first container 5, second container 4 is contour and is Hollow structure, second container 4 are sleeved in the first container 5;It is equipped with and is placed on pcb board between the first container 5 and second container 4 Several transducing circuits 6, the upper and lower end face sealing between the first container 5 and second container 4;4 inside of second container is provided with number A socket 3,10 one end of piezoelectric energy-conversion piece are fixed in socket 3, and 10 other end horizontal direction second container of piezoelectric energy-conversion piece, 4 inside is prolonged It stretches;The piezoelectric energy-conversion piece 10 includes piezoelectric ceramics 1 and substrate 2, and piezoelectric ceramics 1 is by picking out circuit and 6 anode of transducing circuit Connection, substrate 2 are connected by picking out circuit with 6 negative terminal of transducing circuit;Described 6 numbers of transducing circuit and 10 numbers of piezoelectric energy-conversion piece Identical and corresponding connection one by one.
Wherein, piezoelectric energy-conversion piece 10 is in array distribution from top to bottom;10 length of piezoelectric energy-conversion piece arranges from short to long, piezoelectricity 10 numbers of transduction piece are n, and as n < 10, n-th ratio (n-1) leaf length increases by 10%;Work as n<When 20, n-th than (n-1) Leaf length increases by 5%;And the maximum length of piezoelectric energy-conversion piece 10 is no more than the cuboid length of side in this direction or piezoelectric energy-conversion The maximum length of piece 10 is not more than the diameter of cylinder.The first container 5, the material of second container 4 are organic glass;The first container Upper and lower end face between 5 and second container 4 bonds organic glass capsulation by glass cement.Transducing circuit 6 is voltage-doubler rectification Circuit.Piezoelectric ceramics 1 is optional piezoelectric ceramics PZT.10 one end of piezoelectric energy-conversion piece is fixed on by glass cement in socket 3.
With reference to attached Figure 4 and 5,1 one end of piezoelectric ceramics in piezoelectric energy-conversion piece 10 connects capacitance C1, capacitance C1The other end is distinguished With diode D1Cathode and diode D2Anode be connected;Diode D1Anode and 2 phase of substrate in piezoelectric energy-conversion piece 10 Connection, diode D2Cathode and capacitance C2It is connected;Wherein capacitance C1, capacitance C2For polarity free capacitor, size is needed according to reality Border frequency and output voltage, when output, entire circuit are upper just lower negative.The operation principle of two voltage doubling rectifying circuit, works as piezoelectricity When transduction piece output is upper just lower negative, diode D1Cut-off, diode D2Conducting, electric current flow through capacitance C1, diode D2, capacitance C2, when piezoelectric patches output bears lower timing, diode D to be upper1Conducting, diode D2Cut-off, electric current flow through diode D1, capacitance C1, And capacitance C1With capacitance C2Series connection, output voltage are equal to voltage in two capacitances and are added;Then several two voltage doubling rectifying circuits are simultaneously Connection.
With reference to attached drawing 6, the electric energy that piezoelectric energy-conversion piece 10 is collected into first is alternating current, can the alternating current be passed through rectification Circuit carries out rectification, but rectified voltage still possesses larger alternating component, it is impossible to the DC power supply of electronic circuit is directly done, Again by filter circuit, the alternating component in Output Voltage in Rectified Circuits can be filtered out, retains its DC component, waveform and then guarantor Maintain an equal level and slide;It is faint in view of electricity in nature, charge pump booster circuit can be added in and boosted to voltage value, wherein charge pump Clock signal in circuit is provided with oscillating circuit, finally by the circuit output after boosting.
The embodiment is the preferred embodiment of the present invention, but present invention is not limited to the embodiments described above, not Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace Or modification all belongs to the scope of protection of the present invention.

Claims (7)

1. a kind of fluid oscillation energy collecting device based on piezoelectric material, which is characterized in that including the first container (5), second Container (4);
The first container (5), second container (4) are cuboid or cylinder;
The first container (5), second container (4) is contour and is hollow structure, and second container (4) is sleeved on the first container (5) It is interior;Be equipped between the first container (5) and second container (4) and be placed in several transducing circuits (6) on pcb board, the first container (5) with Upper and lower end face sealing between second container (4);Several sockets (3), piezoelectric energy-conversion piece are provided on the inside of the second container (4) (10) one end is fixed in socket (3), extension on the inside of piezoelectric energy-conversion piece (10) other end horizontal direction second container (4);The pressure Electric transduction piece (10) includes piezoelectric ceramics (1) and substrate (2), and piezoelectric ceramics (1) is by picking out circuit and transducing circuit (6) anode Connection, substrate (2) are connected by picking out circuit with transducing circuit (6) negative terminal;Transducing circuit (6) number and piezoelectric energy-conversion piece (10) number is identical and corresponding connection one by one;
The piezoelectric energy-conversion piece (10) is in array distribution from top to bottom;Piezoelectric energy-conversion piece (10) length arranges from short to long, piezoelectricity Transduction piece (10) number is n, and as n < 10, n-th ratio (n-1) leaf length increases by 10%;And piezoelectric energy-conversion piece (10) is most Long length is no more than the cuboid length of side in the horizontal direction or the maximum length of piezoelectric energy-conversion piece (10) no more than cylinder Diameter.
A kind of 2. fluid oscillation energy collecting device based on piezoelectric material according to claim 1, which is characterized in that institute State the first container (5), the material of second container (4) is organic glass;Above and below between the first container (5) and second container (4) End face bonds organic glass capsulation by glass cement.
A kind of 3. fluid oscillation energy collecting device based on piezoelectric material according to claim 1, which is characterized in that institute It is two voltage doubling rectifying circuit to state transducing circuit (6).
A kind of 4. fluid oscillation energy collecting device based on piezoelectric material according to claim 1, which is characterized in that institute It is that the alternating current that piezoelectric energy-conversion piece (10) is collected into is carried out rectification by rectification circuit to state transducing circuit (6), then filtered electrical After the filtering of road, boost by charge pump circuit to voltage, finally by the circuit output after boosting.
A kind of 5. fluid oscillation energy collecting device based on piezoelectric material according to claim 4, which is characterized in that institute The clock signal for stating charge pump circuit is provided by oscillating circuit.
A kind of 6. fluid oscillation energy collecting device based on piezoelectric material according to claim 1, which is characterized in that institute Piezoelectric ceramics (1) is stated as piezoelectric ceramics PZT.
A kind of 7. fluid oscillation energy collecting device based on piezoelectric material according to claim 1, which is characterized in that institute Piezoelectric energy-conversion piece (10) one end is stated to be fixed in socket (3) by glass cement.
CN201610151728.3A 2016-03-16 2016-03-16 A kind of fluid oscillation energy collecting device based on piezoelectric material CN105811803B (en)

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CN106230314B (en) * 2016-09-14 2017-12-29 长春工业大学 Rotation dial type piezoelectric generating device for Internet of things node energy supply
CN108649834A (en) * 2018-03-23 2018-10-12 佛山市顺德区中山大学研究院 A kind of novel piezoelectric energy acquisition interface circuit
CN110389014A (en) * 2019-07-16 2019-10-29 沈阳化工大学 A kind of piezoelectric energy collects array Flow vibration experimental provision and its operating method
CN111049425B (en) * 2019-12-31 2020-12-11 厦门大学 Low-frequency multidirectional vibration energy collecting device with liquid as energy harvesting medium

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JP2003302264A (en) * 2002-04-08 2003-10-24 Yokogawa Electric Corp Ultrasonic propagation device
CN202121523U (en) * 2011-06-24 2012-01-18 齐冀 Track vibration energy recovery system based on piezoelectric cantilever beam and super capacitor
CN104747353B (en) * 2015-01-27 2017-11-03 上海理工大学 The fluid-duct-system that a kind of utilization piezo technology generates electricity
CN105006991A (en) * 2015-07-22 2015-10-28 上海交通大学 Laminated piezoelectric downhole energy collection device
CN105231576A (en) * 2015-09-29 2016-01-13 陈卫东 Smart shoe with kinetic energy charging function

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