CN105811803A - Piezoelectric material based fluid vibration energy collection apparatus - Google Patents
Piezoelectric material based fluid vibration energy collection apparatus Download PDFInfo
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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
- H02N2/185—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention discloses a piezoelectric material based fluid vibration energy collection apparatus. The fluid vibration energy collection apparatus comprises a first container and a second container, wherein the first container and the second container are cuboids or cylinders; the second container is sleeved by the first container; multiple transduction circuits arranged on a PCB are arranged between the first container and the second container; the upper and lower end planes between the first container and a second container are sealed; multiple sockets are formed in the inner side of the second container; one ends of piezoelectric transduction sheets are fixed in the sockets while the other ends of the piezoelectric transduction sheets extend to the center of the second container; the piezoelectric transduction sheets comprise piezoelectric ceramics and substrates; the piezoelectric ceramics are connected with the positive ends of the corresponding transduction circuits through wire-outlet circuits; the substrates are connected with the negative ends of the corresponding transduction circuits through the wire-outlet circuits; the number of the transduction circuits is equal to that of the piezoelectric transduction sheets, and the transduction circuits are in one-to-one correspondence connection with the piezoelectric transduction sheets. According to the apparatus, the broadband is realized and the energy collection effect is improved due to different lengths, shape structures and position relations of the piezoelectric transduction sheets.
Description
Technical field
The invention belongs to vibration energy harvesting field, refer more particularly to a kind of fluid oscillation energy collecting device based on piezoelectric.
Background technology
Piezoelectric can produce this phenomenon of electric charge under the effect of external force and have been found to decades, but is subject to the restriction of piezoelectric generating capacity, is collected by this Partial charge, to store the power supply research being used as to drive micropower electrical equipment always little.In recent years, the use of highly integrated low power dissipation electron element and radio frequency technology, the application for piezoelectric energy collection technique provides premise.And the power consumption of sensor, microprocessor and radio-frequency devices constantly reduces, system capacity revenue and expenditure tends to balance gradually, and miniature environment energy collection technology becomes study hotspot both domestic and external again.
Energy gathering apparatus can be divided into electromagnetic type, piezoelectric type and electrostatic three kinds.When electromagnetic type device utilizes magnet to vibrate based on electromagnetic induction principle, sectioned coil produces induction electric energy, can be used for human body vibration energy capture and micro-vibrating power-generation, but has structure complexity, a defect that volume is bigger.Electrostatic conversion can directly produce 2V extremely a few volt voltages, it is possible to combines with MEMS, but electrostatic conversion needs an independent voltage source to initialize transformation process.The operation principle of piezo-electric device is to utilize piezoelectric being deformed upon by external mechanical effect, can produce electric field when forming internal stress.Simple in construction, do not generate heat, without electromagnetic interference, be prone to processing and fabricating and the miniaturization realizing in structure, integrated etc., be particularly suited for all kinds of sensing and detection system.So piezoelectric type vibration energy collecting device is optimum selection.Piezoelectric energy collection research starts to compare early in the country such as Japanese and American-European, and the domestic research to piezo-electric generating is still in the primary stage.
As far back as 1984, PVDF thin slice was placed on organism by American science circle Hausler and Stein, using organism breathe time rib stretching exercise produced by energy as Research foundation, the energy produced during by biological motion is converted to electric energy.This is the starting point collecting feasibility study about piezoelectric energy.
1996, piezoelectric type energy acquisition equipment transformation efficiency was studied by Japanese Scientists.Experimental provision is made up of a steel ball and freely-supported beam type piezoelectric ceramic plate, and steel ball clashes into piezoelectric ceramic plate so that it is occurs bending and deformation and sends the signal of telecommunication, the impact on piezoelectric ceramics generating efficiency of the many factors of test piezoceramic material.This is the research collecting conversion efficiency about piezoelectric energy.
1997, the piezoelectric energy storing mode that it is storing media with electric capacity that same Japanese Scientists tests.Test finds that piezoelectric vibrator output charge amount increases with the increase of external storage capacitors value, also increases with the increase of piezoelectric vibrator duration of oscillation simultaneously.In this experiment, the maximum conversion efficiency of piezoelectric energy-conversion element is 35%, is three times of conversion efficiency of solar cell.
At home, 2002, Nanjing Aero-Space University Sun Ya flew et al. the energy by being stored in its electric field and strain field when piezoelectric actuator shrinks, and the system constituted by temporary charge reservoir device realizes recovery and the utilization of electric charge.2011, horse Huaan of Shanghai Communications University et al. devises the piezoelectric vibration energy based on environmental energy collection and sends harvester and can widen the working band of 5Hz, but still adopt cantilever beam form, when ambient vibration direction is different from overarm arm direction of vibration, deformation sharply reduces, and use is limited in scope.
Present domestic piezoelectric is used for transformator, transducer, wave filter, ultrasonic vibrator etc., and it is also rarely found at home with collection of energy to do generating with piezoelectric.In sum, currently piezoelectric energy being collected systematic research and exploitation is in rise state, market is in the starting stage, no matter is therefore from technology or market angle, and this field will be respectively provided with very big development and the rising space in future.
The operation principle of piezo-electric device is to utilize piezoelectric being deformed upon by external mechanical effect, can produce electric field when forming internal stress；In prior art, there is the problem that frequency of vibration is single in piezoelectric energy-conversion sheet vibration energy harvesting field, and this causes ought not easily not reaching natural frequency by frequency of vibration in the environment, piezoelectric energy-conversion sheet output electricity weak effect.In order to solve this problem, and the place that piezoelectric patches uses is widened, energy can be collected among air and current, difference according to air velocity, flow rate of water flow, combines piezoelectric energy-conversion sheet according to certain length shapes structure and position relationship thus designing a kind of energy gathering apparatus.
Summary of the invention
It is an object of the invention to provide a kind of fluid oscillation energy collecting device based on piezoelectric, this device combines according to the different length shapes structure of piezoelectric energy-conversion sheet and position relationship, thus realizing widebandization to promote the collecting effect of energy, this device can have the place of current or the place collection electric energy that wind flow is big at any time in the environment.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of fluid oscillation energy collecting device based on piezoelectric, including the first container, second container；Described first container, second container are cuboid or cylinder；Described first container, second container are contour and be hollow structure, and second container is sleeved in the first container；Being provided with the several transducing circuit being placed on pcb board between first container and second container, the upper and lower end face between the first container and second container seals；Having several socket inside described second container, piezoelectric energy-conversion sheet one end is fixed in socket, and piezoelectric energy-conversion sheet other end level extends to second container center；Described piezoelectric energy-conversion sheet includes piezoelectric ceramics and substrate, and piezoelectric ceramics is connected with transducing circuit anode by picking out circuit, and substrate is connected with transducing circuit negative terminal by picking out circuit；Described transducing circuits present is identical with piezoelectric energy-conversion sheet number and corresponding connection one by one.
Further, described piezoelectric energy-conversion sheet is from top to bottom in array distribution；Piezoelectric energy-conversion leaf length arranges from short to long, and piezoelectric energy-conversion sheet number is n, and as n < 10, n-th ratio (n-1) leaf length increases by 10%；As n, < when 20, n-th increases by 5% than (n-1) leaf length；And the greatest length of piezoelectric energy-conversion sheet is not more than the greatest length of the cuboid length of side in the direction or piezoelectric energy-conversion sheet and is not more than cylindrical diameter.
Further, the first container, second container material be lucite；Upper and lower end face between first container and second container is bondd organic glass capsulation by glass cement.
Further, transducing circuit is two voltage doubling rectifying circuit.
Further, transducing circuit is that the alternating current collected by piezoelectric energy-conversion sheet carries out rectification by rectification circuit, then after filter circuit filtering, through charge pump circuit, voltage is boosted, 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 sheet one end is fixed in socket by glass cement.
Beneficial effect:
1. the present invention can be put in the sink in such as hand washing sink, the flow energy flowing into sewer in pond is converted into electric energy, reach the effect that an energy regeneration utilizes, economize on resources.
2. wind energy can be collected in the place (air outlet such as air-conditioning) that ought be placed on outdoor has wind to blow, and converts wind energy into electric energy, to power electronic equipment.
3. cuboid or cylinder vibrational energy collection device greatly reduce the physical size of this device, save space, have widened the field that vibrational energy is collected, and have had portable feature.
4. the arrangement piezoelectric energy-conversion sheet of piezoelectric energy-conversion sheet is from top to bottom in array distribution；Piezoelectric energy-conversion leaf length arranges the collection being beneficial to convection cell vibrational energy from short to long.
5. the length and width of piezoelectric energy-conversion sheet is the same, length increases from top to bottom successively, the piezoelectric patches of different length is the working band width in order to improve whole system, it is beneficial to whole system and can reach resonant frequency under different current (air-flow) velocity conditions, it is achieved that the absorption of vibrational energy wideband carries high-power output.
6. whole transducing circuit and energy-storage travelling wave tube are placed between the first container, second container, take full advantage of the space of inside, it is greatly saved the volume of whole system, the sealed device in upper and lower end face between first container, second container simultaneously, play good isolation, whole circuit will not be intake, and serves the effect of a safety and convenience, and whole system can be carried with.
7. the electric current that piezoelectric energy-conversion sheet the is collected rectification by rectification circuit, the electric current that rectification circuit is exported by filter circuit is filtered, so that waveform is more smooth, finally by electric charge pump, magnitude of voltage is boosted by booster circuit, thus obtaining being suitable for the power supply of application.
Accompanying drawing explanation
Fig. 1 cuboid energy gathering apparatus schematic diagram；
Fig. 2 piezoelectric energy-conversion sheet side view；
Fig. 3 cylindrical shape energy gathering apparatus schematic diagram；
The single two voltage doubling rectifying circuit figure of Fig. 4；
Fig. 5 transducing circuit diagram；
Fig. 6 piezoelectric energy-conversion circuit block diagram.
Accompanying drawing labelling is expressed as follows:
1-piezoelectric ceramics；2-substrate；3-socket；4-second container；5-the first container；6-transducing circuit；7-diode；8-storage capacitor；9-fluid；10-piezoelectric energy-conversion sheet.
Detailed description of the invention
In conjunction with accompanying drawing, a kind of fluid oscillation energy collecting device based on piezoelectric, including the first container 5, second container 4；Described first container 5, second container 4 are cuboid or cylinder；Described first container 5, second container 4 are contour and be hollow structure, and second container 4 is sleeved in the first container 5；Being provided with the several transducing circuit 6 being placed on pcb board between first container 5 and second container 4, the upper and lower end face between the first container 5 and second container 4 seals；Having several socket 3 inside described second container 4, piezoelectric energy-conversion sheet 10 one end is fixed in socket 3, and piezoelectric energy-conversion sheet 10 other end level extends inside second container 4；Described piezoelectric energy-conversion sheet 10 includes piezoelectric ceramics 1 and substrate 2, and piezoelectric ceramics 1 is connected with transducing circuit 6 anode by picking out circuit, and substrate 2 is connected with transducing circuit 6 negative terminal by picking out circuit；Described transducing circuit 6 number is identical with piezoelectric energy-conversion sheet 10 number and corresponding connection one by one.
Wherein, piezoelectric energy-conversion sheet 10 is from top to bottom in array distribution；Piezoelectric energy-conversion sheet 10 length arranges from short to long, and piezoelectric energy-conversion sheet 10 number is n, and as n < 10, n-th ratio (n-1) leaf length increases by 10%；As n, < when 20, n-th increases by 5% than (n-1) leaf length；And the greatest length of piezoelectric energy-conversion sheet 10 is not more than the greatest length of the cuboid length of side in the direction or piezoelectric energy-conversion sheet 10 and is not more than cylindrical diameter.First container 5, second container 4 material be lucite；Upper and lower end face between first container 5 and second container 4 is bondd organic glass capsulation by glass cement.Transducing circuit 6 is two voltage doubling rectifying circuit.Piezoelectric ceramics 1 is optional piezoelectric ceramics PZT.Piezoelectric energy-conversion sheet 10 one end is fixed in socket 3 by glass cement.
In conjunction with attached Figure 4 and 5, piezoelectric ceramics 1 one end in piezoelectric energy-conversion sheet 10 connects electric capacity C1, electric capacity C1The other end respectively with diode D1Negative pole and diode D2Positive pole be connected；Diode D1Positive pole be connected with the substrate 2 in piezoelectric energy-conversion sheet 10, diode D2Negative pole and electric capacity C2It is connected；Wherein electric capacity C1, electric capacity C2For polarity free capacitor, size needs according to actual frequency and output voltage, and when output, whole circuit is upper just lower negative.The operation principle of two voltage doubling rectifying circuit, when piezoelectric energy-conversion sheet be output as upper just lower negative time, diode D1Cut-off, diode D2Conducting, electric current flows through electric capacity C1, diode D2, electric capacity C2, when piezoelectric patches is output as upper negative lower timing, diode D1Conducting, diode D2Cut-off, electric current flows through diode D1, electric capacity C1, and electric capacity C1With electric capacity C2Series connection, output voltage is added equal to voltage in two electric capacity；Then several two voltage doubling rectifying circuits are in parallel.
In conjunction with accompanying drawing 6, first the electric energy that piezoelectric energy-conversion sheet 10 is collected is alternating current, this alternating current can be carried out rectification by rectification circuit, but rectified voltage still has bigger alternating component, can not directly make the DC source of electronic circuit, again by filter circuit, the alternating component in Output Voltage in Rectified Circuits can be filtered, retain its DC component, waveform and then maintenance smooth；Consider that in nature, electricity is faint, it is possible to adding charge pump booster circuit and magnitude of voltage is boosted, wherein the clock signal oscillating circuit in charge pump circuit provides, finally by the circuit output after boosting.
Described embodiment is the preferred embodiment of the present invention; but the present invention is not limited to above-mentioned embodiment; when without departing substantially from the flesh and blood of the present invention, those skilled in the art can make any conspicuously improved, replace or modification belongs to protection scope of the present invention.
Claims (8)
1. the fluid oscillation energy collecting device based on piezoelectric, it is characterised in that include the first container (5), second container (4)；
Described first container (5), second container (4) are cuboid or cylinder；
Described first container (5), second container (4) is contour and be hollow structure, and second container (4) is sleeved in the first container (5)；Being provided with the several transducing circuit (6) being placed on pcb board between first container (5) and second container (4), the upper and lower end face between the first container (5) and second container (4) seals；Described second container (4) inner side has several socket (3), piezoelectric energy-conversion sheet (10) one end is fixed in socket (3), and piezoelectric energy-conversion sheet (10) other end level extends to second container (4) inner side；Described piezoelectric energy-conversion sheet (10) includes piezoelectric ceramics (1) and substrate (2), piezoelectric ceramics (1) is connected with transducing circuit (6) anode by picking out circuit, and substrate (2) is connected with transducing circuit (6) negative terminal by picking out circuit；Described transducing circuit (6) number is identical with piezoelectric energy-conversion sheet (10) number and corresponding connection one by one.
2. a kind of energy gathering apparatus based on piezoelectric according to claim 1, it is characterised in that described piezoelectric energy-conversion sheet (10) is from top to bottom in array distribution；Piezoelectric energy-conversion sheet (10) length arranges from short to long, and piezoelectric energy-conversion sheet (10) number is n, and as n < 10, n-th ratio (n-1) leaf length increases by 10%；As n, < when 20, n-th increases by 5% than (n-1) leaf length；And the greatest length of piezoelectric energy-conversion sheet (10) is not more than the greatest length of the cuboid length of side in the direction or piezoelectric energy-conversion sheet (10) and is not more than cylindrical diameter.
3. a kind of energy gathering apparatus based on piezoelectric according to claim 1 and 2, it is characterised in that described first container (5), second container (4) material be lucite；Upper and lower end face between first container (5) and second container (4) is bondd organic glass capsulation by glass cement.
4. a kind of fluid oscillation energy collecting device based on piezoelectric according to claim 1, it is characterised in that described transducing circuit (6) is two voltage doubling rectifying circuit.
5. a kind of fluid oscillation energy collecting device based on piezoelectric according to claim 1, it is characterized in that, described transducing circuit (6) is that the alternating current collected by piezoelectric energy-conversion sheet (10) carries out rectification by rectification circuit, then after filter circuit filtering, through charge pump circuit, voltage is boosted, finally by the circuit output after boosting.
6. a kind of fluid oscillation energy collecting device based on piezoelectric according to claim 5, it is characterised in that the clock signal of described charge pump circuit is provided by oscillating circuit.
7. a kind of fluid oscillation energy collecting device based on piezoelectric according to claim 1, it is characterised in that described piezoelectric ceramics (1) is piezoelectric ceramics PZT.
8. a kind of fluid oscillation energy collecting device based on piezoelectric according to claim 1, it is characterised in that described piezoelectric energy-conversion sheet (10) one end is fixed in socket (3) by glass cement.
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| CN201610151728.3A CN105811803B (en) | 2016-03-16 | 2016-03-16 | A kind of fluid oscillation energy collecting device based on piezoelectric material |
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| CN201610151728.3A CN105811803B (en) | 2016-03-16 | 2016-03-16 | A kind of fluid oscillation energy collecting device based on piezoelectric material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230314A (en) * | 2016-09-14 | 2016-12-14 | 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 |
| CN111049425A (en) * | 2019-12-31 | 2020-04-21 | 厦门大学 | Novel low-frequency multidirectional vibration energy collecting device with liquid as energy capturing 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 |
| CN104747353A (en) * | 2015-01-27 | 2015-07-01 | 上海理工大学 | Fluid pipeline system utilizing piezoelectric technology to generate 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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2016
- 2016-03-16 CN CN201610151728.3A patent/CN105811803B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104747353A (en) * | 2015-01-27 | 2015-07-01 | 上海理工大学 | Fluid pipeline system utilizing piezoelectric technology to generate 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230314A (en) * | 2016-09-14 | 2016-12-14 | 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 |
| CN111049425A (en) * | 2019-12-31 | 2020-04-21 | 厦门大学 | Novel low-frequency multidirectional vibration energy collecting device with liquid as energy capturing medium |
| 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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