CN101854130B - Force-electricity energy converter and array thereof - Google Patents
Force-electricity energy converter and array thereof Download PDFInfo
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- CN101854130B CN101854130B CN2010102111091A CN201010211109A CN101854130B CN 101854130 B CN101854130 B CN 101854130B CN 2010102111091 A CN2010102111091 A CN 2010102111091A CN 201010211109 A CN201010211109 A CN 201010211109A CN 101854130 B CN101854130 B CN 101854130B
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Abstract
The invention discloses a force-electricity energy converter and an array thereof. The energy converter works in a bending-pressing mode and converts vibration of an environment or energy generated when a human body walks into electric energy by using a piezoelectricity principle. The energy converter of the invention comprises a pair of piezoelectric units and a pair of bow-shaped elastic elements, wherein the piezoelectric units and the elastic elements are fixed by pre-loading devices; and the elastic elements convert a transverse force (or outside vibration) applied by the outside to an elastic strip into longitudinal (axial) pressure which is applied to the piezoelectric units and is amplified in the bending-pressing mode and then the piezoelectric units efficiently generate electricity through the piezoelectric effect. The invention further relates to the array of the force-electricity energy converter. The array is used for converting mechanical energy which is generated when the human body (including other moving vehicles) operates on a plate into the electric energy and outputting the electric energy. The force-electricity energy converter and the array thereof have the advantages of simple structure, low resonant frequency and low manufacturing cost and can guarantee to work for a long term under the high-pressure working condition.
Description
Technical field
The invention belongs to mechanical energy and reclaim and power field particularly a kind of force-electricity energy converter.
Background technology
The world today, exhaustion day by day along with non-renewable energy resources, environmental energy reclaims with generating more and more becomes the problem that the various countries scientist is paid close attention to, increasing scientists is thrown oneself into the research of environmental energy recovery and Blast Furnace Top Gas Recovery Turbine Unit (TRT), comprise that luminous energy, heat energy, electromagnetic energy and machinery and vibrational energy in the environment reclaim and generating, have developed the energy recycle device of various ways.The piezoelectric energy recovery device is that the piezoelectric effect by a kind of force-electricity energy converter directly is converted into mechanical energy electric energy output, compares with electromagnetic energy retracting device etc., and remarkable advantages is arranged.Such as, its apparatus structure is very simple, has high mechanical energy-couple electrical energy coefficient and high advantages such as energy conversion efficiency simultaneously, has reclaimed with power field in mechanical energy and has been subjected to common concern.In recent years, the force-electricity energy converter that utilizes piezoelectric principle to reclaim mechanical energy develops very rapid, uses to comprise the sensing system self-powered, high-power generatings such as highway generating and ocean wave etc.
Traditional force-electricity energy converter based on piezoelectric principle mainly contains: (1) beam type piezoelectricity/metal composite structure is generally operational in simple beam mode; (2) piezoelectricity/metal " cymbals formula " composite construction is operated in a curved-pattern; (3) cylindrical piezoelectric shape or disk shape structure are generally operational in simple normal pressure pattern; The composite construction of (4) piezoelectric high polymer membrane structure, or piezoelectric high polymer film and metal is generally operational in simple normal pressure or beam mode.The mechanical vibrational energy that the beam type force-electricity energy converter is suitable for low frequency, little amplitude reclaims, and can not bear big pressure; Piezoelectricity/metal " cymbals formula " composite construction is the modified version of beam type force-electricity energy converter, but curved because of being operated in-open pattern, under big tension force effect, the piezoelectric ceramic of fragility feature or piezoelectric single crystal device are easy to sustain damage; Though cylindrical piezoelectric shape or disk shape force-electricity energy converter can bear big normal pressure, the rigidity of Yin Qigao causes very high resonance frequency, is not suitable for the low frequency vibration mechanical energy and reclaims.Flexible piezoelectric high polymer membrane structure force-electricity energy converter can be worked under low frequency, also can bear big relatively pressure, but its piezoelectric property is far below piezoelectric ceramic and piezoelectric monocrystal performance.Therefore, be necessary to develop a kind of follow-on force-electricity energy converter based on piezoelectric principle, can be under low frequency and big pressure, the mechanical energy that high efficiency recovery mechanical oscillation and human locomotion produce.
Summary of the invention
The object of the present invention is to provide a kind of force-electricity energy converter unit and array based on piezoelectric principle and curved-die pressing type, can be under low frequency and big pressure the mechanical energy that produces of high efficiency recovery mechanical oscillation and human locomotion.
Force-electricity energy converter provided by the invention comprises a pair of piezoelectric unit that has central bore, between above-mentioned two piezoelectric units, be provided with the flexible member of the tortuous bow shape of two upper and lower symmetric arrays, two annular flange dishes are positioned at the inboard of two piezoelectric units, its outer surface has two parallel grooves, be used to install upper and lower flexible member, above-mentioned piezoelectric unit and flexible member are fixed by pre-tightening apparatus.
Described piezoelectric unit is ring-type piezoelectric ceramic or piezoelectric monocrystal, or is superposeed vertically and constituted by a plurality of ring piezoelectric pottery or monocrystalline along thickness direction polarization.Each piezoelectric ceramic or monocrystalline adopt the piezoelectric effect of the reinforcement that is connected in parallel and obtains on circuit; It can produce many times electric current output under the situation that is subjected to vertical (axially) active force.
Described pre-tightening apparatus is made of a screw rod and nut, and the diameter of screw rod is littler than the internal diameter of piezoelectric unit, and its two ends are passed ring flange and piezoelectric unit and nut respectively and fixed.
Flexible member can make with the elastomeric material of the high strength such as beryllium copper after spring steel or the heat treatment.In the flexible member center, can attach suitable mass respectively, when having the extraneous vibration excitation, these masses put on the supercentral cross force of flexure strip because of the effect of inertia force also produces one, again by " curved-press " mode conversion, be converted to a longitudinal pressure that is applied on the piezoelectric pile and is exaggerated and generate electricity.
Above-mentioned force-electricity energy converter is in series or in parallel to form transducer array on circuit.
In the present invention: flexible member and piezoelectric unit initial condition all are to be in confined state.When flexible member is subjected to ambient pressure or does forced vibration, can push the piezoelectric pile of both sides, thereby produce output voltage.When particularly the extraneous vibration driving frequency was the intrinsic beam mode resonance frequency of tortuous bow shape flexure strip in the force-electricity energy converter, transducer can produce the strongest machine-electric coupling because of resonance, thereby produced maximum electric energy output.
The present invention compared with prior art, advantage is:
It is a kind of force-electricity energy converter of compact conformation, and the piezoelectric effect of utilizing piezoelectric pile to strengthen directly is converted to electric energy with mechanical energy.Brought into play the withstand voltage of piezoelectric ceramic or monocrystalline simultaneously and the characteristic of strain insulator (stretching) not, make piezoelectric unit always work in compact model, overcome tradition curved-open the short life problem of pattern force-electricity energy converter, can guarantee the long-term work and have longer working life under big pressure operating state of generator unit in the force-electricity energy converter.Utilize tortuous bow shape flexure strip structure simultaneously, not only can reduce the resonance frequency of force-electricity energy converter, and the dynamic excitation vibration force can be amplified, thereby obtain bigger energy output." curved-as to press " of the present invention pattern force-electricity energy converter also has simple in structure and low manufacturing cost characteristics.
Description of drawings
Fig. 1 is an embodiment of the invention structural representation;
Fig. 2 is the piezoelectric unit structural representation of power shown in Figure 1-electric transducing;
Fig. 3 is " curved-as to press " pattern force-electricity energy converter array schematic diagram;
Among the figure: 10--bends-die pressing type force-electricity energy converter unit; The 20--piezoelectric unit; 30--tortuous bow shape flexible member; The 40--pre-tightening apparatus; The 41--screw rod; The 42--ring flange; The 43--nut; The 1-upper plate; The 2-lower plate.
Embodiment
Below in conjunction with specific embodiment the present invention is further described.
As seen from Figure 1: shown in force-electricity energy converter unit 10 comprise a pair of piezoelectric pile 20 that has central bore, one is opposite to tortuous bow shape flexible member 30 and the pre-tightening apparatus 40 that piezoelectric pile 20 is assembled into flexible member 30 that slightly is arch between two piezoelectric pile.
Fig. 2 is the structural representation of the piezoelectric pile 20 of power shown in Figure 1-electric transducing 10.This piezoelectric pile 20 can by a plurality of ring piezoelectric potsherds or piezoelectric monocrystal sheet and thin copper sheet superpose vertically compound (utilizing adhering with epoxy resin) constitute, also can be the multilayer piezoelectric ceramic that utilizes electrode-ceramic co-fired knot method preparation; Piezoelectric element in this piezoelectric pile 20 is preferably even number, and along the thickness direction polarization, polarised direction is reverse successively, shown in arrow among Fig. 2, adopts the piezoelectric effect that is connected in parallel and obtains to strengthen on the circuit; Under the situation that is subjected to vertical (axially) active force, the electric current output that those piezoelectric ceramic can produce many times because of being connected in parallel on the circuit in the piezoelectric pile 20.
Described flexible member 30 is the tortuous bow shape, the external world can be put on flexure strip 30 supercentral cross forces (or extraneous vibration), by " curved-as to press " mode conversion, be converted to vertical (axially) pressure that is applied on the piezoelectric pile 20 and is exaggerated, generate electricity by piezoelectric effect again.Described a pair of tortuous bow shape flexible member 30 centers, can attach suitable mass respectively, when having the extraneous vibration excitation, these masses also produce a cross force that puts on flexure strip 30 because of the effect of inertia force, again by " curved-press " mode conversion, be converted to one and be applied on the piezoelectric pile 20 and the longitudinal pressure that is exaggerated and generating electricity.When the extraneous vibration driving frequency approached the intrinsic beam mode resonance frequency of tortuous bow shape flexure strip 30 in the force-electricity energy converter, transducer can produce the strongest machine-electric coupling because of resonance, thereby produces maximum electric energy output.Tortuous bow shape flexible member 30 can be with the elastomeric material manufacturing of the high strength such as beryllium copper after spring steel or the heat treatment.
Described pre-tightening apparatus 40 is by a screw rod 41, and a pair of ring flange 42 and nut 43 constitute.The diameter of screw rod 41 requires slightly littler than the internal diameter of piezoelectric pile 20, and respectively there is one section screw thread at its two ends.Nut 43 cooperates with screw rod 41.Ring flange 42 is a ring-type, and its internal diameter equates that with the internal diameter of piezoelectric pile 20 there are 2 parallel grooves an one side, is used for elastic elements 30.Bend-die pressing type force-electricity energy converter 10 according to assembling shown in Figure 1, reconcile the distance between two nuts 43, make two piezoelectric pile 20 under the acting in conjunction of pre-tightening apparatus 40 and a pair of tortuous bow shape flexible member 30, be in suitable pressure state, be operated in compact model, this has given full play to the withstand voltage of piezoelectric ceramic or monocrystalline and the characteristic of strain insulator (stretching) not, overcome tradition curved-open the short life problem of pattern force-electricity energy converter, can guarantee the long-term work and have longer working life under big pressure operating state of generator unit in the force-electricity energy converter; Utilize tortuous bow shape flexure strip structure simultaneously, not only can reduce the resonance frequency of force-electricity energy converter, and the dynamic excitation vibration force can be amplified, thereby obtain bigger energy output." curved-as to press " of the present invention pattern force-electricity energy converter also has simple in structure and low manufacturing cost characteristics.
Fig. 3 is " curved-as to press " pattern force-electricity energy converter array schematic diagram.A plurality of " curved-as to press " pattern force-electricity energy converter unit is installed between two blocks of parallel plates, can bear bigger pressure.In parallel or series connection can produce bigger output current or output voltage on these transducer unit circuit.This transducer array can high efficiency recovery mechanical oscillation and the mechanical energy that produces of human locomotion.
It should be noted that at last the purpose of publicizing and implementing example is to help further to understand the present invention, but it will be appreciated by those skilled in the art that: without departing from the spirit and scope of the invention and the appended claims, various substitutions and modifications all are possible.Therefore, the present invention should not be limited to the disclosed content of embodiment, and the scope of protection of present invention is as the criterion with the scope that claims define.
Claims (6)
1. force-electricity energy converter, it is characterized in that, comprise a pair of piezoelectric unit, between above-mentioned two piezoelectric units, be provided with the flexible member of the tortuous bow shape of two upper and lower symmetric arrays, two annular flange dishes lay respectively at the inboard of two piezoelectric units, its outer surface has two parallel grooves, is used to install upper and lower flexible member, and above-mentioned piezoelectric unit and flexible member are fixed by pre-tightening apparatus.
2. transducer as claimed in claim 1 is characterized in that, described piezoelectric unit is ring piezoelectric pottery or piezoelectric monocrystal, or is made of a plurality of ring piezoelectric pottery or monocrystalline stacks along the thickness direction polarization.
3. transducer as claimed in claim 2, it is characterized in that, described pre-tightening apparatus is made of a screw rod and nut, the diameter of screw rod is littler than the internal diameter of piezoelectric unit, its two ends are passed ring flange and piezoelectric unit and nut respectively and are fixed, and pre-tightening apparatus applies a pretightning force vertically to piezoelectric unit.
4. transducer according to claim 1 is characterized in that, flexible member adopts the high-strength materials such as beryllium copper after spring steel or the heat treatment.
5. the described force-electricity energy converter of claim 1 is in series or in parallel to form transducer array.
6. transducer array as claimed in claim 5 is characterized in that, a plurality of transducer units are formed array, and down a plate is installed respectively thereon, makes it to form an integral body.
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| CN2010102111091A CN101854130B (en) | 2010-06-28 | 2010-06-28 | Force-electricity energy converter and array thereof |
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| CN101854130B true CN101854130B (en) | 2011-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019229318A1 (en) * | 2018-05-29 | 2019-12-05 | Universite Savoie Mont Blanc | Vibrational energy recovery system |
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| CN102497134B (en) * | 2011-12-26 | 2015-03-25 | 上海交通大学 | Group walking energy collection system |
| CN104655342B (en) * | 2015-01-15 | 2017-07-14 | 南京林业大学 | Mechanical seal face friction torque measurement apparatus based on self-powered and wireless data transmission |
| CN107293111A (en) * | 2017-07-26 | 2017-10-24 | 武汉市政工程设计研究院有限责任公司 | A kind of intelligent sidewalk for visually impaired people acoustic control system for prompting and method |
| CN108988684B (en) * | 2018-07-16 | 2019-10-18 | 哈尔滨工程大学 | A kind of absorbing and vibrational energy acquire integrated apparatus |
| CN110329307A (en) * | 2019-07-26 | 2019-10-15 | 上海工程技术大学 | A kind of passive and wireless shaft temperature monitoring system |
| CN111641350A (en) * | 2020-05-14 | 2020-09-08 | 西安交通大学 | Flextensional transducer based on shearing piezoelectric mode |
| CN112769349A (en) * | 2020-12-25 | 2021-05-07 | 西安交通大学 | Cymbal type piezoelectric single crystal driver |
| CN113556058A (en) * | 2021-08-03 | 2021-10-26 | 山东大学 | Multi-direction piezoelectric energy collection device |
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| CN2676155Y (en) * | 2004-01-09 | 2005-02-02 | 武汉大学 | Cymbal sensor |
| US7379392B1 (en) * | 2005-10-17 | 2008-05-27 | The United States Of America As Represented By The Secretary Of The Navy | Flexible cymbal array |
| CN101656494A (en) * | 2009-09-18 | 2010-02-24 | 哈尔滨工业大学 | High-load piezoelectric generating device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2676155Y (en) * | 2004-01-09 | 2005-02-02 | 武汉大学 | Cymbal sensor |
| US7379392B1 (en) * | 2005-10-17 | 2008-05-27 | The United States Of America As Represented By The Secretary Of The Navy | Flexible cymbal array |
| CN101656494A (en) * | 2009-09-18 | 2010-02-24 | 哈尔滨工业大学 | High-load piezoelectric generating device |
Non-Patent Citations (1)
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| 周勇 等.半钹形压电合成射流驱动器及其特征参数研究.《航空学报》.2009,第30卷(第2期),265-270. * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019229318A1 (en) * | 2018-05-29 | 2019-12-05 | Universite Savoie Mont Blanc | Vibrational energy recovery system |
| FR3082072A1 (en) * | 2018-05-29 | 2019-12-06 | Universite Savoie Mont Blanc | VIBRATORY ENERGY RECOVERY |
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