CN104124894A - Stairs-based piezoelectric generating device - Google Patents
Stairs-based piezoelectric generating device Download PDFInfo
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- CN104124894A CN104124894A CN201410382082.0A CN201410382082A CN104124894A CN 104124894 A CN104124894 A CN 104124894A CN 201410382082 A CN201410382082 A CN 201410382082A CN 104124894 A CN104124894 A CN 104124894A
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- arc surface
- base plate
- briquetting
- piezoelectric
- piezoelectric ceramic
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Abstract
The invention discloses a stairs-based piezoelectric generating device. The device comprises two parts, namely, a rotor and a stator; the rotor which is arranged above the stator comprises a pedal, and a locating pin that is connected to the pedal; the stator comprises a base plate, a supporting limiting strip, a spring and a piezoelectric generating unit, wherein the supporting limiting strip, the spring and the piezoelectric generating unit are mounted on the base plate; the piezoelectric generating unit comprises an upper pressing plate, a T-shaped elastic rod, a drive pressing block, a driven pressing block, an arc-surface bottom plate, a supporting plate, a connecting part, a copper pole plate, an A piezoelectric ceramic chip and a B piezoelectric ceramic chip, wherein the drive pressing block is arranged at the upper side of the T-shaped elastic rod and close to the upper pressing plate; the driven pressing block is arranged at the end part of the lower side of the T-shaped elastic rod; the A piezoelectric ceramic sheet chip and the B piezoelectric ceramic sheet chip are respectively adhered on the upper surface and the lower surface of the copper pole plate; the piezoelectric generating unit is fixed to the upper surface of the base plate through the connecting part. The piezoelectric generating device has the advantages that the structure is simple, the power capacity is large, the piezoelectric conversion efficiency is high, the piezoelectric ceramic is uneasy to be damaged and broken, any uncomfortable sense like pealing on an empty is avoided.
Description
Technical field
The present invention relates to a kind of energy recycle device that utilizes piezoceramic material direct piezoelectric effect, specifically, relate to a kind of piezoelectric generating device based on stair.
Background technology
Utilize device that piezoelectric ceramic direct piezoelectric effect generates electricity because of its have environmental protection and energy saving, simple in structure, without electromagnetic interference, be easy to realize, low cost and other advantages, become countries in the world researcher's the focus of attention.Study both at home and abroad to utilize body kinetic energy to carry out piezoelectric generating device more, publication number is that the patent documentation of CN201956927U discloses a kind of piezoelectric generating device that utilizes human body frequently to step on away, this device utilizes human body spring lever mechanism to be trampled to the potential energy that forms spring deformation, and then retracting spring deformation potential knocks and carries out piezo-electric generating piezoelectric, this apparatus structure is simple, cost is low, energy output is concentrated, it is slower that but human body is trampled the speed that this device lever construction rear foot packs up, the percussion power after spring deformation potential energy discharges, piezoceramic material being formed is very little, affect the generating conversion efficiency of piezoelectric ceramic piece, in addition, the stroke that human body is trampled is greater than 2mm, step on the senses of discomfort such as empty.
For the energy that utilizes human body to trample building front step generates electricity, publication number is the piezoelectric generating device that the patent documentation of CN102064734A discloses a kind of building front step, piezoelectric ceramic is arranged between upper carpet and lower carpet, by human body, trampling of piezoelectric ceramic produced electric energy and carry out collection of energy, this device has simple in structure, cost is low, the advantages such as energy output is concentrated, but also there is certain deficiency in this device: piezoelectricity transformation efficiency is low, human body directly impacts piezoelectric ceramic piece after trampling carpet, easily causes piezoelectric ceramic piece non-plastic fracture to damage.
The patent No. is 201320203629.7, denomination of invention is that a kind of patent documentation of cantilever piezo-electric generating assembly discloses a kind of piezoelectric generating device that utilizes cantilever lever principle, this device has solved the sense of discomfort that human body Trample generating set produces, but find in deep experiment of later stage, in the brittle failure deformation range of piezoelectric, piezoelectric cantilever end applies after external force or displacement, in same cross section, piezoelectric cantilever stiff end is in vertical direction displacement minimum, free end travel maximum, but the piezoelectric ceramic deformation maximum of piezoelectric cantilever stiff end, more trend towards its piezoelectric ceramic deformation of free end less, the vanishing of free-ended piezoelectric ceramic shape.Because the energy output of piezoelectric cantilever and the deformation size of piezoelectric ceramic are directly proportional, therefore the energy output maximum of piezoelectric cantilever stiff end, trending towards free end energy output reduces gradually, free end end energy output is zero, that is to say that this cantilever piezo-electric generating assembly can not utilize body kinetic energy fully, fully improves the generating transformation efficiency of piezoelectric cantilever.
Summary of the invention
The invention provides a kind of novel piezoelectric generating device based on stair, object is to utilize body kinetic energy to carry out the conversion efficiency of piezo-electric generating in order to improve, and steps on the sense of discomfort such as empty and directly trample piezoelectric ceramic piece easily to cause its problem such as damage of breaking while avoiding trampling piezoelectric generating device.
Based on a piezoelectric generating device for stair, comprise mover and stator two parts, mover is made up of pedal and the alignment pin being connected on pedal, is arranged on the top of stator; Stator is by substrate and be arranged on support limit bar, spring and the piezo-electric generating cell formation on substrate, on substrate, be provided with the hole of matching with alignment pin on mover, when alignment pin is inserted into behind the hole on substrate, mover just can not all around move again, can only move up and down; Some support limit bars that be arranged in parallel are installed on upper surface of base plate, substrate is divided into several regions, multiple piezo-electric generatings unit is installed in each region, a spring is installed in the interval of 2-5 piezo-electric generating unit.
Piezo-electric generating unit is by top board, T-shaped elastic rod, be arranged on the active briquetting of T-shaped elastic rod upside near top board, be arranged on the driven briquetting of T-shaped elastic rod downside end, arc surface base plate, supporting bracket, connector, copper polar plate and stick on the square A piezoelectric ceramic piece of copper polar plate upper and lower surface and square B piezoelectric ceramic piece forms, the equal through-thickness polarization of A piezoelectric ceramic piece and B piezoelectric ceramic piece and polarised direction are contrary, the A piezoelectric ceramic piece of all piezo-electric generatings unit, B piezoelectric ceramic piece and copper polar plate are all connected in power conversion circuits and energy accumulating device by serial or parallel connection mode.
Initiatively briquetting is arranged on the position of T-shaped elastic rod upside near top board by bonding or welding, initiatively briquetting is 1/10 ~ 1/2 of T-shaped elastic rod jib-length to the distance of top board, and driven briquetting is arranged on T-shaped elastic rod downside end by bonding or welding; Arc surface base plate, copper polar plate, supporting bracket, T-shaped elastic rod and top board arrange successively from bottom to top, on arc surface base plate, copper polar plate, supporting bracket, T-shaped elastic rod and top board, all offer and can, for the connection holes connecting, be connected as one and be fixed on upper surface of base plate through after the connection holes of each part by connector.After the T-shaped end of T-shaped elastic rod is fixedly clamped by top board and supporting bracket, T-shaped elastic rod has just formed piezoelectric cantilever lever construction, and the T-shaped elastic rod place of being fixed is fulcrum, and initiatively briquetting is power arm to fulcrum section, and driven briquetting is resistance arm to fulcrum section.
In the vertical direction, the upper level of described top board with the upper level of support limit bar concordant, the height of spring upper surface is with initiatively briquetting upper level is concordant, and the upper level of spring and active briquetting all exceeds 0.2 ~ 1.8mm than top board and support limit bar upper level; Arc surface base plate one end offers the connection holes for connecting use, other end upper surface is arc surface, arc surface is tangent with upper surface topmost, the center of circle of arc surface is under incision superius, the upper end of arc surface is concordant with the end of piezoelectric ceramic piece, the width of the width>=piezoelectric ceramic piece of arc surface base plate, the length of the arc surface of arc surface base plate length>=piezoelectric ceramic piece of projection on bottom surface, the radius value of arc surface is 50
mm~ 340
mmbetween; Arc surface base plate, supporting bracket, top board, active briquetting and driven briquetting are as the non-conducting material of plastics, timber, pottery or glass.
In the time that human body is trampled the pedal of mover, pedal and initiatively briquetting move down, according to lever principle, the driven briquetting that is arranged on T-shaped elastic rod downside will move down the distance moving down more than active briquetting, only need trample very little distance downwards to pedal and active briquetting, can drive piezo-electric generating plate free end to move down larger distance and realize the power conversion of body kinetic energy to electric energy, thereby improve the piezoelectricity conversion efficiency of piezo-electric generating plate.
Driven briquetting drives piezoelectric cantilever free end to move down, along with progressively moving down of driven briquetting, piezoelectric cantilever fits with the upper arc surface of arc surface base plate gradually from stiff end to free end, thereby ensure that the uniformity of deformation and every section of piezoelectric ceramic piece deformation all occurs piezoelectric cantilever every section of piezoelectric ceramic piece from stiff end to free end, the deformation of every section of piezoelectric ceramic piece is normal value, and this deformation values is relevant with the arc radius of arc surface on arc surface base plate, the arc radius of arc surface on arc surface base plate is rationally set, ensure that piezoelectric ceramic piece is in its brittle failure deformation range, avoid simple piezoelectric cantilever large at stiff end energy output, the problems such as free end energy output is little, make every section of piezoelectric ceramic piece that deformation all occur, fully improve the piezoelectricity conversion efficiency of piezoelectric cantilever piezoelectric ceramic piece.
Trample and finish after pin lifts when human body, the potential energy that the spring on substrate produces due to pedal compression starts to discharge, and the pedal of upspringing is to origin-location, and piezo-electric generating plate returns to original state by the elasticity of self.Because pedal is larger, in the time having people to trample pressing plate, drive multiple piezo-electric generatings unit to generate electricity simultaneously, utilize to greatest extent human body to trample the kinetic energy of generation.Whole piezoelectric generating device is placed on the stair that the stream of people is larger, and in the time having people pass through continuously pushes pedals and discharge, this piezoelectric generating device can complete continuous piezo-electric generating process.
Due to the support limit effect of top board and support limit bar, restriction pedal, initiatively briquetting and human body only can move down 0.2 ~ 1.8mm, distance is shorter, without stepping on the uncomfortable sensations such as empty, and avoid human body to trample impulsive force and the direct of piezoelectric ceramic piece contacts, ensured that piezoelectric ceramic piece is not by concussion fracture or damage.The existence of arc surface base plate, has ensured the uniformity of piezoelectric ceramic piece deformation and the controllability that curvature changes, and has fully improved the generating efficiency of piezoelectric cantilever piezoelectric ceramic piece.Compared with prior art, that piezoelectric generating device that should be based on stair has is simple in structure, power capacity large, complete machine manufacture assembling easily, cost is low, piezoelectricity conversion efficiency is high, while trampling without stepping on the advantages such as sense of discomfort, environmentally safe, long service life such as empty.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of piezo-electric generating unit in the present invention.
Fig. 3 is the front view of piezo-electric generating of the present invention unit.
Fig. 4 is the structural representation of piezo-electric generating unit top board in the present invention.
Fig. 5 is the structural representation of the T-shaped elastic rod in piezo-electric generating unit in the present invention.
Fig. 6 is the structural representation of piezo-electric generating unit supports plate in the present invention.
Fig. 7 is the structural representation of piezo-electric generating unit copper polar plate in the present invention.
Fig. 8 is the structural representation of piezo-electric generating unit arc surface base plate in the present invention.
Fig. 9 is the front view of piezo-electric generating unit arc surface base plate in the present invention.
Figure 10 is the initiatively structural representation of briquetting of piezo-electric generating unit in the present invention.
Figure 11 is the structural representation of the driven briquetting in piezo-electric generating unit in the present invention.
Figure 12 is the structural representation of substrate in the present invention.
Figure 13 is the structural representation of support limit bar in the present invention.
Number in the figure explanation: 1. substrate, 2. support limit bar, 3. spring, 4. piezo-electric generating unit, 5. alignment pin, 6. pedal, 40. arc surface base plates, 41.A piezoelectric ceramic piece, 42. copper polar plates, 43.B piezoelectric ceramic piece, 44. driven briquettings, 45.T type elastic rod, 46. active briquettings, 47. connectors, 48. top boards, 49. supporting brackets.
Embodiment
Shown in Fig. 1-3, the piezoelectric generating device based on stair comprises mover and stator two parts, and mover is made up of pedal 6 and the alignment pin 5 being connected on pedal 6, is arranged on the top of stator, and pedal 6 materials are pine, long 2200mm, wide 290mm, thick 6mm; Stator is made up of substrate 1 and the support limit bar 2, spring 3 and the piezo-electric generating unit 4 that are arranged on substrate 1, substrate 1 material is pine, long 2200mm, wide 290mm, thick 20mm, on substrate 1, be provided with the hole that can match with alignment pin on mover 5, aperture is 10.1mm, and alignment pin 5 diameters are 10mm, when alignment pin 5 is inserted into behind the hole on substrate 1, mover just can not all around move again, can only move up and down; 3 support limit bars 2 that be arranged in parallel are installed on substrate 1 upper surface, two are arranged on substrate 1 both sides, one is arranged in the middle of substrate 1, substrate 1 is divided into 2 regions, 18 piezo-electric generating unit 4 are installed in each region, 36 piezo-electric generating unit 4 are installed altogether above substrate 1, and in each long and narrow region, a spring 3 is installed in the interval of 3 piezo-electric generating unit 4, spring 3 central diameter 16mm, length 20mm.
Piezo-electric generating unit 4 comprises top board 48, T-shaped elastic rod 45, initiatively briquetting 46, driven briquetting 44, arc surface base plate 40, supporting bracket 49, screw, copper polar plate 42 and stick on A piezoelectric ceramic piece 41 and the B piezoelectric ceramic piece 42 of copper polar plate 42 upper and lower surfaces, copper polar plate 42 materials are beryllium-bronze, length is 70mm, width is 50mm, thickness is 0.3mm, the material of A piezoelectric ceramic piece 41 and B piezoelectric ceramic piece 42 is PZT-5, length is 50mm, width is 50mm, thickness is 0.2mm, A piezoelectric ceramic piece 41 and B piezoelectric ceramic piece 42 be through-thickness polarization and polarised direction contrary, the every pair of A piezoelectric ceramic piece 41 and B piezoelectric ceramic piece 42 carry out parallel connection, and then 36 piezo-electric generating unit 4 are connected in parallel in to power conversion circuits and energy accumulating device, initiatively briquetting 46 is bonded in the position of T-shaped elastic rod 45 upsides near top board 48, and initiatively briquetting 46 is 1/5 of T-shaped elastic rod 45 jib-lengths to top board 48 distances, and driven briquetting 44 is by being bonded in T-shaped elastic rod 45 end downsides.
Arc surface base plate 40, copper polar plate 42, supporting bracket 49, T-shaped elastic rod 45 and top board 48 arrange successively from bottom to top, on arc surface base plate 40, copper polar plate 42, supporting bracket 49, T-shaped elastic rod 45 and top board 48, all offering can be for the connection holes connecting, bore dia is 4.3mm, be connected as one and be fixed on substrate 1 upper surface through after the connection holes of each part by joint bolt 47, joint bolt 47 nominal diameters are 4mm.
The diameter that arc surface base plate 40 one end offer for connecting use is 4.3
mmconnection holes, other end upper surface is arc surface, arc surface is tangent with upper surface topmost, the center of circle of arc surface is under incision superius, the upper end of arc surface is concordant with the end of piezoelectric ceramic piece, the width of arc surface base plate is 70
mm, the length of the arc surface of arc surface base plate projection on bottom surface is 90
mm, the radius of arc surface is 240
mm; Arc surface base plate 40, supporting bracket 49, top board 48, active briquetting 46 and driven briquetting 44 are nylon-66 plastic material.
In the vertical direction, the upper level of described top board 48 with the upper level of support limit bar 2 concordant, the height of spring 3 upper surfaces is with initiatively briquetting 46 upper level are concordant, and the upper level of spring 3 and active briquetting 46 all exceeds 1mm than top board 48 and support limit bar 2 upper level.
Shown in Fig. 4-13, pedal 6, alignment pin 5, substrate 1, support limit bar 2, copper polar plate 42, driven briquetting 44, T-shaped elastic rod 45, active briquetting 46, top board 48, supporting bracket 49 and arc surface base plate 40 structural representations, fully demonstrate the structure of each part, to understand the connecting relation between each part.
The piezoelectric generating device of this invention is put on stair, the situation that simulation human body is trampled is tested, in the time that people tramples mover pedal 6, pedal 6 and initiatively briquetting 46 only can move down 1mm, it is shorter that human body is trampled downward shift length, without stepping on the senses of discomfort such as empty, according to lever principle, initiatively briquetting 46 moves down 1mm, and 44 of driven briquettings that are arranged on T-shaped elastic rod 45 downsides move down 5mm.
Driven briquetting 44 drives piezoelectric cantilever free end to move down, along with progressively moving down of driven briquetting 44, piezoelectric cantilever fits with the upper arc surface of arc surface base plate gradually from stiff end to free end, ensure that the uniformity of deformation and every section of piezoelectric ceramic piece deformation, arc surface radius=240 of internal diameter radius value=arc surface base plate of piezoelectric cantilever Bending Deformation all occur piezoelectric cantilever every section of piezoelectric ceramic piece from stiff end to free end
mm, arc surface radius+copper polar plate thickness+piezoelectric ceramic piece one-tenth-value thickness 1/10 x2=240 of external diameter radius value=arc surface base plate of piezoelectric cantilever Bending Deformation
mm+ 0.3
mm+ 0.2
mmx2=240.7
mm, fully improved the generating efficiency of piezoelectric cantilever piezoelectric ceramic piece.
In the time trampling pressing plate, driven multiple piezo-electric generatings unit 4 to generate electricity simultaneously, in the time having people pass through continuously pushes pedals 6 and discharge, this piezoelectric generating device can complete continuous piezo-electric generating process.When trampling frequency while being 1Hz, use oscilloscope to measure the output voltage of A piezoelectric ceramic piece 1 and B piezoelectric ceramic piece 3, its output voltage maximum is respectively 32.4
vwith 30.2
v, more simple its output voltage of piezoelectric cantilever stair piezoelectric generating device improves a lot, and power generation performance is good.
Claims (5)
1. the piezoelectric generating device based on stair, comprises mover and stator two parts, and mover is made up of pedal and the alignment pin being connected on pedal, is arranged on the top of stator; Stator is by substrate and be arranged on support limit bar, spring and the piezo-electric generating cell formation on substrate; It is characterized in that: on substrate, be provided with the hole of matching with alignment pin on mover, some support limit bars that be arranged in parallel are installed on upper surface of base plate, substrate is divided into several regions, multiple piezo-electric generatings unit is installed in each region, a spring is installed in the interval of 2-5 piezo-electric generating unit; Piezo-electric generating unit by top board, T-shaped elastic rod, be arranged on T-shaped elastic rod upside and form near the active briquetting of top board, the driven briquetting that is arranged on T-shaped elastic rod downside end, arc surface base plate, supporting bracket, connector, copper polar plate and the square A piezoelectric ceramic piece and the square B piezoelectric ceramic piece that stick on copper polar plate upper and lower surface, the equal through-thickness polarization of A piezoelectric ceramic piece and B piezoelectric ceramic piece and polarised direction are contrary; Initiatively briquetting is arranged on the position of T-shaped elastic rod upside near top board by bonding or welding, initiatively briquetting is 1/10 ~ 1/2 of T-shaped elastic rod jib-length to the distance of top board, and driven briquetting is arranged on T-shaped elastic rod downside end by bonding or welding; Arc surface base plate, copper polar plate, supporting bracket, T-shaped elastic rod and top board arrange successively from bottom to top, on arc surface base plate, copper polar plate, supporting bracket, T-shaped elastic rod and top board, all offer and can, for the connection holes connecting, be connected as one and be fixed on upper surface of base plate through after the connection holes of each part by connector; In the vertical direction, the upper level of described top board with the upper level of support limit bar concordant, the height of spring upper surface is with initiatively briquetting upper level is concordant, and the upper level of spring and active briquetting all exceeds 0.2 ~ 1.8mm than top board and support limit bar upper level; Arc surface base plate one end offers the connection holes for connecting use, other end upper surface is arc surface, arc surface is tangent with upper surface topmost, the center of circle of arc surface is under incision superius, the upper end of arc surface is concordant with the end of piezoelectric ceramic piece, the width of the width>=piezoelectric ceramic piece of arc surface base plate, the length of the arc surface of arc surface base plate length>=piezoelectric ceramic piece of projection on bottom surface, the radius value of arc surface is 50
mm~ 340
mmbetween; Arc surface base plate, supporting bracket, top board, active briquetting and driven briquetting are non-conducting material; A piezoelectric ceramic piece, B piezoelectric ceramic piece and copper polar plate are all connected in power conversion circuits and energy accumulating device by serial or parallel connection mode.
2. the piezoelectric generating device based on stair according to claim 1, is characterized in that: described arc surface base plate, top board, supporting bracket, active briquetting and driven briquetting are plastic material.
3. the piezoelectric generating device based on stair according to claim 1, is characterized in that: described arc surface base plate, top board, supporting bracket, active briquetting and driven briquetting are wood materials.
4. the piezoelectric generating device based on stair according to claim 1, is characterized in that: described arc surface base plate, top board, supporting bracket, active briquetting and driven briquetting are ceramic material.
5. the piezoelectric generating device based on stair according to claim 1, is characterized in that: described arc surface base plate, top board, supporting bracket, active briquetting and driven briquetting are glass material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410382082.0A CN104124894A (en) | 2014-08-06 | 2014-08-06 | Stairs-based piezoelectric generating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410382082.0A CN104124894A (en) | 2014-08-06 | 2014-08-06 | Stairs-based piezoelectric generating device |
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| Publication Number | Publication Date |
|---|---|
| CN104124894A true CN104124894A (en) | 2014-10-29 |
Family
ID=51770187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410382082.0A Pending CN104124894A (en) | 2014-08-06 | 2014-08-06 | Stairs-based piezoelectric generating device |
Country Status (1)
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| CN (1) | CN104124894A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680724A (en) * | 2016-04-25 | 2016-06-15 | 苏州科技学院 | Modular buried piezoelectric power generation device |
| CN105743388A (en) * | 2016-04-20 | 2016-07-06 | 西安电子科技大学 | Pedal type piezoelectric power generation apparatus and method |
| CN113131790A (en) * | 2021-04-22 | 2021-07-16 | 长春工业大学 | Install piezoelectricity power generation facility on step |
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| CN113131790B (en) * | 2021-04-22 | 2022-06-17 | 长春工业大学 | Install piezoelectricity power generation facility on step |
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Address after: 215009 Suzhou City, Jiangsu province high tech Zone CREE Road, No. 1 Applicant after: Suzhou University of Science and Technology Address before: 215009 Suzhou City, Jiangsu province high tech Zone CREE Road, No. 1 Applicant before: University of Science and Technology of Suzhou |
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Application publication date: 20141029 |