CN103580535A - Insole-type piezoelectric generator - Google Patents
Insole-type piezoelectric generator Download PDFInfo
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- CN103580535A CN103580535A CN201310513591.8A CN201310513591A CN103580535A CN 103580535 A CN103580535 A CN 103580535A CN 201310513591 A CN201310513591 A CN 201310513591A CN 103580535 A CN103580535 A CN 103580535A
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Abstract
The invention provides an insole-type piezoelectric generator. The insole-type piezoelectric generator comprises an upper protective layer, a lower protective layer, at least one piezoelectric electricity generation unit and a power management module. The upper protective layer is placed above the lower protective layer, and the upper protective layer and the lower protective layer are both in an insole shape. The at least one piezoelectric electricity generation unit is placed between the upper protective layer and the lower protective layer. Each piezoelectric electricity generation unit comprises an upper tooth layer, a lower tooth layer and a piezoelectric thin film. The upper tooth layers are placed above the lower tooth layers. The lower surfaces of the upper tooth layers comprise upper racks and upper tooth grooves which are arranged in an alternating mode, the upper surfaces of the lower tooth layers comprise lower tooth grooves and lower racks which are arranged in an alternating mode, the upper racks are opposite to the lower tooth grooves, and the upper tooth grooves are opposite to the lower racks. The piezoelectric thin films are placed between the upper tooth layers and the lower tooth layers. The power management module is placed between the upper protective layer and the lower protective layer, and the power management module is connected with the piezoelectric thin films in all the piezoelectric electricity generation units. The insole-type piezoelectric generator is simple in structure, comfortable in foot feeling, and suitable for common shoes.
Description
Technical field
The present invention relates to new energy field, relate in particular to a kind of shoe-pad piezoelectric generator.
Background technology
In daily life, human body is at every moment all at consumed energy, and by energy dissipation in environment.Utilize this feature, people designed all kinds of wearable, for collecting the device of body energy.Wherein, can collect generator in the footwear of human motion production capacity is an important directions.At present, in typical footwear generator have adopt piezoelectricity make pottery piezoelectric generator in stacking footwear, utilize generator and electrostatic generator etc. in the combined type footwear of piezoelectric ceramic and Piezoelectric Film for Designing.Although generator has played the effect of collection of energy in these type of footwear, all have that universality is poor, comfortableness is poor, a shortcoming of complex structure and durability deficiency, be unfavorable for the marketization, the commercialization of generator in footwear.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art.
For this reason, the object of the invention is to propose a kind of shoe-pad piezoelectric generator that there is good comfort, is generally applicable to all kinds of shoes.
In one embodiment of the invention, shoe-pad piezoelectric generator, comprising: upper protective layer and lower protective layer, and described upper protective layer is positioned on described lower protective layer, and described upper protective layer and described lower protective layer are insole shape; At least one piezo-electric generating unit, described at least one piezo-electric generating unit is on described between protective layer and described lower protective layer, described in each, piezo-electric generating unit comprises: upper tooth layer and lower tooth layer, described upper tooth layer is positioned on described lower tooth layer, the lower surface of described upper tooth layer comprises upper rack and the upper teeth groove of alternative arrangement, the upper surface of described lower tooth layer comprises lower teeth groove and the lower tooth bar of alternative arrangement, and described upper rack is relative with described lower teeth groove and described upper teeth groove is relative with described lower tooth bar; And piezoelectric membrane, described piezoelectric membrane is on described between tooth layer and described lower tooth layer; And power management module, described power management module is on described between protective layer and described lower protective layer, and described power management module is connected with the described piezoelectric membrane in described at least one piezo-electric generating unit.
In one embodiment of the invention, described shoe-pad piezoelectric generator comprises two described piezo-electric generating unit, two described piezo-electric generating unit lay respectively at forefoot correspondence position and rear heel correspondence position in described shoe-pad piezoelectric generator, and described power management module is arranged in the arch of foot correspondence position of described shoe-pad piezoelectric generator.
In one embodiment of the invention, power management module specifically comprises: rectification module, and described rectification module is connected with described piezoelectric membrane, for being direct current by AC rectification; Energy-storage module, described energy-storage module is connected with described rectification module, for store electrical energy; And output control module, described output control module is connected with described energy-storage module, for controlling electric energy output.
In one embodiment of the invention, the material of described piezoelectric membrane is Kynoar.
In one embodiment of the invention, the thickness range of described piezoelectric membrane is 10～1000 μ m.
In one embodiment of the invention, the piezoelectric strain constant of described piezoelectric membrane meets d31>10pC/N and d33>10pC/N.
In one embodiment of the invention, the elastic limit of described piezoelectric membrane is greater than 10Mpa.
In one embodiment of the invention, the material of described upper tooth layer and described lower tooth layer is soft material.
In one embodiment of the invention, the cross section of described upper rack and described lower tooth bar is trapezoidal, triangle, arc or rectangle.
In one embodiment of the invention, between described upper tooth layer and described lower tooth layer, comprise multi-layer piezoelectric film, described multi-layer piezoelectric stacks of thin films is placed and is connected in parallel, the surface insulation of piezoelectric membrane described in each of described stacking placement.
According to the shoe-pad piezoelectric generator of the embodiment of the present invention, simple in structure, comfortable foot feeling, be applicable to conventional shoe.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is the vertical view schematic diagram of the shoe-pad piezoelectric generator of the embodiment of the present invention;
Fig. 2 is the front view in the A-A cross section of the shoe-pad piezoelectric generator shown in Fig. 1;
Fig. 3 is the structural representation of the piezo-electric generating unit of the shoe-pad piezoelectric generator described in Fig. 1;
Fig. 4 a is the view of the shoe-pad piezoelectric generator of embodiment of the present invention piezo-electric generating unit when stressed;
Fig. 4 b is the view of the shoe-pad piezoelectric generator of embodiment of the present invention piezo-electric generating unit when not stressed;
Fig. 5 is the schematic layout pattern of piezoelectric unit and power management module in the shoe-pad piezoelectric generator of the embodiment of the present invention;
Fig. 6 is the frame diagram of power management module in the shoe-pad piezoelectric generator of the embodiment of the present invention;
Fig. 7 a is the structural representation of the piezo-electric generating unit with lance tooth unit of the embodiment of the present invention;
Fig. 7 b is the structural representation of the piezo-electric generating unit with rectangular teeth unit of the embodiment of the present invention; With
Fig. 8 has the upper tooth layer of arc tooth unit, the tooth cell schematics of lower tooth layer in the shoe-pad piezoelectric generator of the embodiment of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
Shoe-pad piezoelectric generator according to the embodiment of the present invention, can comprise: upper protective layer 1, lower protective layer 2, at least one piezo-electric generating unit 3 and power management module 4.Wherein, as shown in Figure 1, upper protective layer 1 is positioned on lower protective layer 2, and upper protective layer 1 and lower protective layer 2 are insole shape.As shown in Figure 2, at least one piezo-electric generating unit 3 and power management module 4 are between upper protective layer 1 and lower protective layer 2, and power management module 4 is connected with at least one piezo-electric generating unit 3.It should be noted that, those skilled in the art can also be as required flexibly in shoe-pad piezoelectric generator correct position add fixing fitting with fixing all parts.
As shown in Figure 3, each piezo-electric generating unit 3 specifically comprises: upper tooth layer 31, lower tooth layer 32 and piezoelectric membrane 33.Upper tooth layer 31 is positioned on lower tooth layer 32.The lower surface of upper tooth layer 31 comprises upper rack 31a and the upper teeth groove 31b of alternative arrangement.The upper surface of lower tooth layer 32 comprises lower teeth groove 32a and the lower tooth bar 32b of alternative arrangement.Upper rack 31a is relative with lower teeth groove 32a and upper teeth groove 31b is relative with lower tooth bar 32b.A teeth groove and a tooth bar form a tooth unit.Piezoelectric membrane 33 is between upper tooth layer 31 and lower tooth layer 32, and piezoelectric membrane 33 is connected with power management module 4.
For making this area understand better the present invention, the shoe-pad piezoelectric generator course of work of the present invention being stated to embodiment is below described below:
Fig. 4 a is that foot lands, shoe-pad piezoelectric generator is when stressed, the schematic diagram of the state of piezo-electric generating unit.When motion, foot constantly applies periodic external force to shoe-pad.After foot lands, plantar pressure is moved to half sole by heel.After foot lands, due to the effect of plantar pressure, shoe insole surface is stressed, 32 engagement of upper tooth layer 31 and lower tooth layer, the piezoelectric membrane 33 that is positioned at 32, tooth layer 31 and lower tooth layer left and right direction generation stretcher strain, at upper and lower to compression occurs.Because the material of piezoelectric membrane 33 has piezoelectric effect, the surface of piezoelectric membrane 33 produces electric charge, and the electric charge of generation is collected and stored by power management module 4.
Fig. 4 b is that foot is liftoff, shoe-pad piezoelectric generator is not when stressed, the schematic diagram of the state of piezo-electric generating unit.In the liftoff process of foot, plantar pressure reduces, and shoe insole surface pressure reduces.It is separated with lower tooth layer 32 that piezoelectric membrane 33 promotes tooth layer 31 under the effect of self tension force, the elongation strain that piezoelectric membrane 33 occurs at left and right and upper and lower are progressively decreased to initial value to the compression strain occurring, and follow in the surface of piezoelectric membrane 33 generation heterocharge (situation while landing with respect to foot), the electric charge of generation is by power management module 4 rectifications, collection storage.After foot is completely liftoff, shoe-pad piezoelectric generator is output charge no longer, until next foot lands.Follow periodic external force, the shoe-pad piezoelectric generator of the embodiment of the present invention is exported periodic electric charge, and the electric charge of generation is collected and stored by power management module 4.According to load needs, power management module 4 can be exported electric energy.
In one embodiment of the invention, as shown in Figure 5, shoe-pad piezoelectric generator can comprise two piezo-electric generating unit 3.Two piezo-electric generating unit 3 lay respectively at forefoot correspondence position and rear heel correspondence position in shoe-pad piezoelectric generator, and power management module 4 is arranged in the arch of foot correspondence position of shoe-pad piezoelectric generator.
According to the shoe-pad of above-described embodiment, be piezoelectric generator, according to the layout of the structure of foot and movement characteristic, meet the feature of ergonomics.In addition, the whole flexible material that adopts of the shoe-pad piezoelectric generator of the embodiment of the present invention is made, and the profile of shoe-pad and thickness and general shoe-pad are similar, have good comfortableness.
In one embodiment of the invention, power management module 4 specifically comprises as shown in Figure 6: rectification module 41, energy-storage module 42 and output control module 43.
Wherein, rectification module 41, rectification module 41 is connected with piezoelectric membrane 33, for being direct current by AC rectification.Energy-storage module 42 is connected with rectification module 41, for store electrical energy.Output control module 43 is connected with energy-storage module 42, for controlling electric energy output.It should be noted that, power management module 4 can select integrated circuit (IC) chip, energy-storage travelling wave tube, SMD components, flexible PCB to form by technical staff as required flexibly, and detail does not repeat herein.
According to the power management module 4 of the shoe-pad piezoelectric generator of above-described embodiment, not only realized the function of collection of energy, storage and output, and possessed that low-power consumption, microbody are long-pending, flexible feature.
In addition, for guaranteeing that the shoe-pad generator of the embodiment of the present invention has good comfortableness, has done special design to the shape of the tooth-shape structure of tooth unit.Except the trapezoidal toothed structure shown in Fig. 3, Fig. 4 a and Fig. 4 b and arc tooth-shape structure, can also be triangle profile of tooth structure or rectangle tooth-shape structure, respectively as shown in Fig. 7 a and Fig. 7 b.
According to the structural design of the shoe-pad piezoelectric generator of above-described embodiment, when upper rack (upper teeth groove) and lower teeth groove (lower tooth bar) engagement, piezoelectric membrane is operated in elastic range, both guaranteed that the durability of plastic deformation, enhancing system does not occur piezoelectric membrane, guaranteed that again the production capacity efficiency of piezoelectric membrane is high.
In one embodiment of the invention, upper protective layer 1 and lower protective layer 2 can adopt fabric, make it more soft, wear-resisting, comfortable.
In one embodiment of the invention, the making material of upper tooth layer 31 and lower tooth layer 32 is soft material, as silica gel, rubber, high-density sponge etc.Because these materials have good springiness, are easy to acquisition, lower-cost advantage, therefore make to make shoe-pad piezoelectric generator of the present invention easy to make, economical and practical.
In one embodiment of the invention, the material of piezoelectric membrane 33 can be Kynoar (Poly Vinylidene Fluoride, PVDF).PVDF mainly refers to the copolymer of vinylidene fluoride homopolymer or vinylidene and other a small amount of fluorine-containing vinyl monomers, PVDF resin has the characteristic of fluororesin and resins for universal use concurrently, except having good chemical resistance, heat-resisting quantity, oxidative resistance, weatherability, resistance to x radiation x performance, also there is the properties such as piezoelectricity, dielectricity, pyroelectricity.Adopt this kind of material that shoe-pad generator of the present invention is had wear-resisting, use permanent advantage.
In one embodiment of the invention, the thickness range of piezoelectric membrane 33 is 10～1000 μ m.Guaranteed that shoe-pad Medium-voltage Motor of the present invention is similar with the thickness of general shoe-pad, there is good comfortableness.
In one embodiment of the invention, the piezoelectric strain constant of piezoelectric membrane 33 meets d
31>10pC/N, and d
33>10pC/N.D
31that piezoelectric membrane 33, in left and right direction, stretcher strain occurs, the metric parameter of the quantity of electric charge producing on its surface.D
33 piezoelectric membrane 33 at upper and lower to compression occurs, the metric parameter of the quantity of electric charge producing on its surface.The piezoelectric strain constant being chosen within the scope of this has guaranteed that shoe-pad piezoelectricity function generation of the present invention has the enough large quantity of electric charge.
In one embodiment of the invention, the elastic limit of piezoelectric membrane 33 is greater than 10Mpa.In motion process, can there is not plastic deformation in the shoe-pad generator of this embodiment, durability is good because pressure is excessive.
Select in an embodiment of the present invention the material of piezoelectric membrane to there is the characteristic that thickness is thin as far as possible, piezoelectric strain constant is high as far as possible, elastic limit is high as far as possible.And by the use in parallel of multi-layer piezoelectric film, thereby increase output charge.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
The upper protective layer of shoe-pad piezoelectric generator and the making material of lower protective layer are fabric in one embodiment of the invention, and upper tooth layer and lower tooth layer adopt silica gel to make.It is that 30 piezoelectric membranes μ m, that be made by polyvinylidene fluoride material are formed in parallel that piezoelectric membrane adopts 8 layer thicknesses.The Young's modulus of PVDF is 2500MPa, and elastic limit is 50MPa, piezoelectric strain constant d
33=-21 * 10
-12c/N, d
31=17 * 10
-12c/N, relative dielectric constant is 10.The tooth cell configuration of upper tooth layer and lower tooth layer is arc, long L=10mm, angle α=39 °, as shown in Figure 8.The area of heel and half sole is approximately respectively 50 * 60mm
2, 80 * 90mm
2, in the piezo-electric generating unit at heel and half sole place, have respectively 6 pairs and 9 pairs of tooth unit, in conjunction with Fig. 5.User often makes a move, and can produce the electric charge of 130 μ C.If the energy-storage travelling wave tube of energy-storage module is the electric capacity of 2.2 μ F in electric power management circuit, capacitance voltage rising 59V, energy increases 3.84mJ.If people's cadence is 1～2Hz, the power of shoe-pad piezoelectric generator can reach 3.84～7.68mW, can meet the energy requirement of some consumer electronics.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of indications such as " circumferentially " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or be integral; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, First Characteristic Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic or oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " can be First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And, the specific features of description, structure, material or feature can one or more embodiment in office or example in suitable mode combination.In addition, those skilled in the art can carry out combination and combination by the different embodiment that describe in this specification or example.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (10)
1. a shoe-pad piezoelectric generator, is characterized in that, comprising:
Upper protective layer and lower protective layer, described upper protective layer is positioned on described lower protective layer, and described upper protective layer and described lower protective layer are insole shape;
At least one piezo-electric generating unit, described at least one piezo-electric generating unit is on described between protective layer and described lower protective layer, and described in each, piezo-electric generating unit comprises:
Upper tooth layer and lower tooth layer, described upper tooth layer is positioned on described lower tooth layer, the lower surface of described upper tooth layer comprises upper rack and the upper teeth groove of alternative arrangement, the upper surface of described lower tooth layer comprises lower teeth groove and the lower tooth bar of alternative arrangement, and described upper rack is relative with described lower teeth groove and described upper teeth groove is relative with described lower tooth bar; With
Piezoelectric membrane, described piezoelectric membrane is on described between tooth layer and described lower tooth layer; And
Power management module, described power management module is on described between protective layer and described lower protective layer, and described power management module is connected with the described piezoelectric membrane in described each piezo-electric generating unit.
2. shoe-pad piezoelectric generator according to claim 1, it is characterized in that, described shoe-pad piezoelectric generator comprises two described piezo-electric generating unit, two described piezo-electric generating unit lay respectively at forefoot correspondence position and rear heel correspondence position in described shoe-pad piezoelectric generator, and described power management module is arranged in the arch of foot correspondence position of described shoe-pad piezoelectric generator.
3. shoe-pad piezoelectric generator according to claim 1, is characterized in that, power management module specifically comprises:
Rectification module, described rectification module is connected with described piezoelectric membrane, for being direct current by AC rectification;
Energy-storage module, described energy-storage module is connected with described rectification module, for store electrical energy; With
Output control module, described output control module is connected with described energy-storage module, for controlling electric energy output.
4. shoe-pad piezoelectric generator according to claim 1, is characterized in that, the material of described piezoelectric membrane is Kynoar.
5. shoe-pad piezoelectric generator according to claim 1, is characterized in that, the thickness range of described piezoelectric membrane is 10～1000 μ m.
6. shoe-pad piezoelectric generator according to claim 1, is characterized in that, the piezoelectric strain constant of described piezoelectric membrane meets d
31>10pC/N and d
33>10pC/N.
7. shoe-pad piezoelectric generator according to claim 1, is characterized in that, the elastic limit of described piezoelectric membrane is greater than 10Mpa.
8. shoe-pad piezoelectric generator according to claim 1, is characterized in that, the material of described upper tooth layer and described lower tooth layer is soft material.
9. shoe-pad piezoelectric generator according to claim 1, is characterized in that, the cross section of described upper rack and described lower tooth bar is trapezoidal, triangle, arc or rectangle.
10. shoe-pad piezoelectric generator according to claim 1, it is characterized in that, between described upper tooth layer and described lower tooth layer, comprise multi-layer piezoelectric film, described multi-layer piezoelectric stacks of thin films is placed and is connected in parallel, the surface insulation of piezoelectric membrane described in each of described stacking placement.
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| CN106253747A (en) * | 2016-08-26 | 2016-12-21 | 合肥工业大学 | A kind of integrated form flexibility generating thin film |
| CN106690641A (en) * | 2017-01-12 | 2017-05-24 | 李承霖 | Power-generating foot warmer shoe and control method thereof |
| CN112825460A (en) * | 2019-11-20 | 2021-05-21 | 中原大学 | Piezoelectric energy hunting device with light design and voltage signal application system thereof |
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| CN106690641A (en) * | 2017-01-12 | 2017-05-24 | 李承霖 | Power-generating foot warmer shoe and control method thereof |
| CN112825460A (en) * | 2019-11-20 | 2021-05-21 | 中原大学 | Piezoelectric energy hunting device with light design and voltage signal application system thereof |
| US11538979B2 (en) | 2019-11-20 | 2022-12-27 | Chung-Yuan Christian University | Piezoelectric energy hunting device with lightweight design and voltage signal application system thereof |
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