CN105743389A - Equal-stress cantilever lever intermediate-pressure type piezoelectric power generation module - Google Patents
Equal-stress cantilever lever intermediate-pressure type piezoelectric power generation module Download PDFInfo
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- CN105743389A CN105743389A CN201610259191.2A CN201610259191A CN105743389A CN 105743389 A CN105743389 A CN 105743389A CN 201610259191 A CN201610259191 A CN 201610259191A CN 105743389 A CN105743389 A CN 105743389A
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- 238000010248 power generation Methods 0.000 title abstract description 12
- 239000000919 ceramic Substances 0.000 claims abstract description 51
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000010949 copper Substances 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000005452 bending Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims 2
- 239000011521 glass Substances 0.000 claims 2
- 239000002023 wood Substances 0.000 claims 2
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005381 potential energy Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention discloses an equal-stress cantilever lever intermediate-pressure type piezoelectric power generation module. The piezoelectric power generation module comprises a piezoelectric power generation plate, an elastic lever and an auxiliary support part, wherein the piezoelectric power generation plate comprises a copper pole plate, a square upper piezoelectric ceramic plate and a square lower piezoelectric ceramic plate, the upper piezoelectric ceramic plate and the lower piezoelectric ceramic plate are pasted on the upper surface and the lower surface of the copper pole plate, the elastic lever comprises an elastic rod, a driving press block and a driven press block, the driving press block is arranged on the upper side of the elastic rod and is near to a bending position, the driven press block is arranged at the end part of the lower side of the elastic rod, the auxiliary support part comprises a concave camber surface bottom plate and a long bolt, the concave camber surface bottom plate, the copper pole plate and the elastic rod are sequentially arranged from bottom to top, and the long bolt passes through a linkage hole of each part to make all parts connected into a whole. The piezoelectric power generation assembly has the advantages of simplicity in structure, high power capacity, low cost, high piezoelectric conversion efficiency, no discomfortableness such as footing lost during stepping, no pollution, long service lifetime and the like, the whole machine is easy to fabricate and assemble, and the piezoelectric ceramic is difficult to be damaged and broken.
Description
Technical field
The present invention relates to a kind of energy recycle device utilizing piezoceramic material piezoelectric effect, it particularly relates to pressure type piezo-electric generating assembly in a kind of iso-stress cantilever lever.
Background technology
Utilize device that piezoelectric ceramics direct piezoelectric effect carries out generating electricity because of its have environmental protection and energy saving, simple in construction, without electromagnetic interference, be easily achieved, low cost and other advantages, become the focus of attention of countries in the world research worker.Study both at home and abroad to utilize body kinetic energy to carry out piezoelectric generating device more, the patent documentation that publication number is CN201956927U discloses a kind of piezoelectric generating device utilizing human body frequently to step on away, this device utilizes human body that spring lever mechanism tramples the potential energy forming spring deformation, and then piezoelectric is knocked and carries out piezo-electric generating by release spring deformation potential energy, this apparatus structure is simple, cost is low, generated energy is concentrated, but it is slower that human body tramples the speed that this device lever construction rear foot packs up, the percussion power after the release of spring deformation potential energy, piezoceramic material formed is only small, have impact on the generating conversion efficiency of piezoelectric ceramic piece, additionally, the stroke that human body is trampled is more than 2mm, step on the senses of discomfort such as sky.
The patent No. is 201320203629.7, the patent documentation that denomination of invention is a kind of cantilever piezo-electric generating assembly discloses a kind of piezoelectric generating device utilizing cantilever lever principle, which solves the sense of discomfort that human body Trample generating set produces, but find in the experiment that the later stage is deep, in the brittle failure deformation range of piezoelectric, after piezo-electric generating plate end applies external force or displacement, in same cross section, the fixing end of piezoelectricity power generation plate is minimum in vertical direction displacement, free end travel is maximum, but the piezoelectric ceramics shape strain and stress that end fixed by piezo-electric generating plate is maximum, more trend towards its piezoelectric ceramics shape strain and stress of free end more little, the piezoelectric ceramics shape strain and stress of free end is zero.Owing to the generated energy of piezo-electric generating plate and the stress intensity of piezoelectric ceramics are directly proportional, therefore the Energy Maximization of end fixed by piezo-electric generating plate, trend towards free end generated energy to be gradually reduced, free end end generated energy is zero, that is to say that this cantilever piezo-electric generating assembly can not utilize body kinetic energy fully, fully improve the generating transformation efficiency of piezo-electric generating plate.
Summary of the invention
The invention provides pressure type piezo-electric generating assembly in a kind of novel iso-stress cantilever lever, utilize body kinetic energy to carry out the conversion efficiency of piezo-electric generating in order that improve, step on the senses of discomfort such as sky simultaneously when avoiding trampling piezoelectric generating device and directly trample piezoelectric ceramic piece and be easily caused the problems such as its crack damage.
Pressure type piezo-electric generating assembly in iso-stress cantilever lever, parts are supported including piezo-electric generating plate, elastic lever and auxiliary, described piezo-electric generating plate includes copper polar plate and the square upper piezoelectric ceramic piece being pasted onto on copper polar plate upper and lower surface and lower piezoelectric potsherd, on the contrary, upper piezoelectric ceramic piece, lower piezoelectric potsherd and copper polar plate are each coupled to power conversion circuits and energy accumulating device for upper piezoelectric ceramic piece and the equal through-thickness polarization of lower piezoelectric potsherd and polarised direction.
Elastic lever includes elastic rod, is arranged on the upside of elastic rod near the active briquetting of bending part and the driven briquetting being arranged on elastic rod downside end, actively briquetting is arranged on the position of close bending part on the upside of elastic rod by bonding or welding, actively briquetting is to distance is elastic rod jib-length the 1/10 ~ 1/2 of bending part, and driven briquetting is arranged on elastic rod downside end by bonding or welding.
Auxiliary supports parts and includes cancave cambered surface base plate and stay bolt, cancave cambered surface base plate, copper polar plate and elastic rod are arranged successively from bottom to top, cancave cambered surface base plate, copper polar plate and elastic rod all offer the connection holes being available for coupling, stay bolt is connected as one after the connection holes of each part；In the vertical direction, the high 0.2 ~ 1.8mm of height of the aspect ratio stay bolt upper surface of described active briquetting upper surface.
Equal symmetry on cancave cambered surface floor length direction, width, the raised connection cuboid boss in two ends, boss upper surface offers the connection holes for coupling, it is lower cancave cambered surface in the middle of cancave cambered surface base plate, the length of length >=piezoelectric ceramic piece that the cancave cambered surface of cancave cambered surface base plate projects on bottom surface, the width of width >=piezoelectric ceramic piece that the cancave cambered surface of cancave cambered surface base plate projects on bottom surface, it is a parabola that cancave cambered surface is perpendicular to the cross sectional shape of width, and parabolical P value is between 187.3 ~ 328.5；At the highest point of cancave cambered surface, with boss opposite face distance for length, cancave cambered surface width is wide, excises downwards the groove stopper slot as piezoelectric ceramic piece of deep 2 ~ 5mm；The rectangle baffle plate identical with cancave cambered surface floor length is coupled in order to limit the position of piezoelectric ceramic piece with lag bolt；Cancave cambered surface base plate, gripper shoe, actively briquetting and driven briquetting are non-conducting material.
When the bent end of elastic lever is by after assisting support parts fixing, elastic lever is the formation of piezo-electric generating plate lever construction, elastic lever is assisted support parts bearing to be fulcrum, and actively briquetting is power arm to fulcrum section, and driven briquetting is resistance arm to fulcrum section.
When active briquetting on the upside of people tramples elastic rod, according to lever principle, it is arranged on the driven briquetting on the downside of elastic rod and will move down the distance moved down more than active briquetting, namely only active briquetting need to be trampled downwards only small distance, piezoelectricity power generation plate free end can be driven to move down bigger distance change to realize body kinetic energy to the energy of electric energy, thus improve the piezoelectricity conversion efficiency of piezo-electric generating plate.
Driven briquetting drives piezoelectricity power generation plate free end to move down, along with progressively moving down of driven briquetting, piezoelectric ceramic piece intermediate pressurised is recessed, fit with the upper cancave cambered surface of cancave cambered surface base plate gradually, thus ensure that piezo-electric generating plate all produces stress and the uniformity of every section of piezoelectric ceramic piece generation stress from fixing end to free end every section piezoelectric ceramic piece, the stress of every section of piezoelectric ceramic piece is constant value, and the parabola relating to parameters of cancave cambered surface on this stress value and cancave cambered surface base plate, parabola parameter on cancave cambered surface base plate is rationally set, ensure that piezoelectric ceramic piece is in its brittle failure deformation range, avoid simple piezo-electric generating plate big at middle generated energy, the problems such as two ends generated energy is little, every section of piezoelectric ceramic piece is made all to produce stress, substantially increase the piezoelectricity conversion efficiency of piezo-electric generating plate piezoelectric ceramic piece.
After human body tramples end release actively briquetting, elastic rod returns to original shape, driven briquetting and copper polar plate and departs from, and when human body is trampled continuously and discharges actively briquetting, this piezo-electric generating assembly can complete continuous print piezo-electric generating process.
Due to the support limit effect of stay bolt upper surface, restriction actively briquetting and human body are only capable of moving down 0.2 ~ 1.8mm, distance is shorter, without stepping on the senses of discomfort such as sky, and avoids directly contacting of human body and piezoelectric ceramics, it is ensured that piezoelectric ceramics is not by concussion fracture or damage.The existence of cancave cambered surface base plate, it is ensured that the uniformity of piezoelectric ceramic piece stress and the controllability of Curvature varying, substantially increases the generating efficiency of piezo-electric generating plate piezoelectric ceramic piece.Compared with prior art, in this iso-stress cantilever lever pressure type piezo-electric generating assembly have that simple in construction, power capacity be big, complete machine manufacture assembling easily, cost is low, piezoelectricity conversion efficiency high, piezoelectric ceramics be hardly damaged broken, when trampling without stepping on the advantages such as sense of discomfort, environmentally safe, long service life such as sky.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the front view of the present invention.
Fig. 3 is the system structure schematic diagram of the present invention.
Fig. 4 is the structural representation of cancave cambered surface base plate 1 in the present invention.
Fig. 5 is the front view of cancave cambered surface base plate 1 in the present invention.
Fig. 6 is the structural representation of Elastic bar 2 of the present invention.
Fig. 7 is the structural representation of stay bolt 3 in the present invention.
Fig. 8 is the structural representation of actively briquetting 4 in the present invention.
Fig. 9 is the structural representation of driven briquetting 5 in the present invention.
Figure 10 is the structural representation of upper piezoelectric ceramic piece 6, copper polar plate 7 and lower piezoelectric potsherd 8 in the present invention.
Figure 11 is the structural representation of baffle plate 9 in the present invention.
Number in the figure illustrates: 1. cancave cambered surface base plate, 2. elastic rod, 3. stay bolt, 4. actively briquetting, 5. driven briquetting, 6. goes up piezoelectric ceramic piece, 7. copper polar plate, 8. lower piezoelectric potsherd, 9. baffle plate, 10. lag bolt, 11. power conversion circuits and energy accumulating device.
Detailed description of the invention
In conjunction with shown in Fig. 1 and Fig. 2, in iso-stress cantilever lever, pressure type piezo-electric generating assembly includes piezo-electric generating plate, auxiliary supports parts and elastic lever, described piezo-electric generating plate includes copper polar plate 7 and the square upper piezoelectric ceramic piece 6 being pasted onto on copper polar plate 7 upper and lower surface and lower piezoelectric potsherd 8, upper piezoelectric ceramic piece 6 and the equal through-thickness of lower piezoelectric potsherd 8 polarize and polarised direction is contrary, copper polar plate 7 material is beryllium-bronze, and length is 120mm, width is 46mm, thickness is 0.3mm, piezoelectric ceramics sheet material is PZT-5, and length is 100mm, width is 42mm, thickness is 0.2mm。
Elastic lever includes elastic rod 2, is arranged on the upside of elastic rod 2 near the active briquetting 4 of stay bolt 3 and the driven briquetting 5 being arranged on elastic rod 2 downside end, actively briquetting 4 and driven briquetting 5 are linked together by bonding way and elastic rod 2, actively briquetting 4 to stay bolt 3 apart from for the 1/5 of elastic rod 2 jib-length, in the vertical direction, actively the height of aspect ratio stay bolt 3 upper surface of briquetting 4 upper surface is high by 1mm。
Auxiliary supports parts and includes cancave cambered surface base plate 1 and stay bolt 3；Cancave cambered surface base plate 10, copper polar plate 7 and elastic rod 2 are arranged successively from bottom to top, and cancave cambered surface base plate 1, copper polar plate 7 and elastic rod 2 all offer the connection holes being available for coupling, and bore dia is 5.3mm, stay bolt 3 it being connected as one after the connection holes of each part, stay bolt nominal diameter is 5mm。
Equal symmetry on cancave cambered surface base plate 1 length direction, width, the raised connection cuboid boss in two ends, it is 5 that boss upper surface offers the diameter for couplingmmConnection holes, it is lower cancave cambered surface in the middle of cancave cambered surface base plate, the length that the cancave cambered surface of cancave cambered surface base plate projects on bottom surface is 122mm, the width that the cancave cambered surface of cancave cambered surface base plate projects on bottom surface is 50mm, it is a parabola that cancave cambered surface is perpendicular to the cross sectional shape of width, parabolical P value is 252.4, and parabola peak is from cancave cambered surface base plate 1 lower surface 18.63mm；At the highest point of cancave cambered surface, the rectangular planes using long 122 wide 50 excises downwards the groove stopper slot as piezoelectric ceramic piece of deep 2mm；The rectangle baffle plate of long 142mm width 20mm thickness 1mm is coupled in order to limit the position of piezoelectric ceramic piece with lag bolt；Cancave cambered surface base plate 1, actively briquetting 4 and driven briquetting 5 are nylon-66 plastic material.
Shown in Fig. 3, upper piezoelectric ceramic piece 6, lower piezoelectric potsherd 8 and copper polar plate 7 are each coupled to power conversion circuits and energy accumulating device 11.
When active briquetting 4 on the upside of people tramples elastic rod 2, due to the support limit effect of stay bolt 3, actively briquetting 4 is only capable of moving down 1mm, again owing to active briquetting 4 to stay bolt 3 is apart from for the 1/5 of elastic rod 2 jib-length, according to lever principle, being arranged on the driven briquetting 5 on the downside of elastic rod 2 end and move down 5mm, namely drive piezoelectricity power generation plate free end to move down 5mmDistance.
Driven briquetting 5 drives piezoelectricity power generation plate free end to move down, along with progressively moving down of driven briquetting 5, piezoelectric ceramic piece intermediate pressurised is recessed, fit with the upper cancave cambered surface of cancave cambered surface base plate gradually, ensure that piezo-electric generating plate all produces stress and the uniformity of every section of piezoelectric ceramic piece stress from fixing end to free end every section piezoelectric ceramic piece, substantially increase the generating efficiency of piezo-electric generating plate piezoelectric ceramic piece.
After human body tramples end release actively briquetting 4, elastic rod 2 returns to original shape, and driven briquetting 5 and copper polar plate 7 depart from, and when human body is trampled continuously and discharges actively briquetting 4, this piezo-electric generating assembly can complete continuous print piezo-electric generating process.It is 1 when trampling frequencyHzTime, use oscillograph that the output voltage of upper piezoelectric ceramic piece 6 and lower piezoelectric potsherd 7 is measured, its output voltage maximum respectively 38.5VWith 34.6V, more simple piezo-electric generating its output voltage of plate electrification component improves a lot, and power generation performance is good.
Claims (10)
1. pressure type piezo-electric generating assembly in iso-stress cantilever lever, it is characterized in that: include piezo-electric generating plate, elastic lever and auxiliary support parts, described piezo-electric generating plate includes copper polar plate and the square upper piezoelectric ceramic piece being pasted onto on copper polar plate upper and lower surface and lower piezoelectric potsherd, upper piezoelectric ceramic piece and the equal through-thickness of lower piezoelectric potsherd polarize and polarised direction is contrary, elastic lever includes elastic rod, it is arranged on the upside of elastic rod near the active briquetting of stay bolt and the driven briquetting being arranged on elastic rod downside end, actively briquetting is arranged on the position of close bending part on the upside of elastic rod by bonding or welding；Driven briquetting is arranged on elastic rod downside end by bonding or welding；Auxiliary supports parts and includes cancave cambered surface base plate and stay bolt, cancave cambered surface base plate, copper polar plate and elastic rod are arranged successively from bottom to top, cancave cambered surface base plate, copper polar plate and elastic rod all offer the connection holes being available for coupling, stay bolt is connected as one after the connection holes of each part；Upper piezoelectric ceramic piece, lower piezoelectric potsherd and copper polar plate are each coupled to power conversion circuits and energy accumulating device；Cancave cambered surface base plate, gripper shoe, actively briquetting and driven briquetting are non-conducting material.
2. pressure type piezo-electric generating assembly in iso-stress cantilever lever according to claim 1, it is characterized in that: cancave cambered surface floor length direction, equal symmetry on width, the raised connection cuboid boss in two ends, boss upper surface offers the connection holes for coupling, it is cancave cambered surface in the middle of cancave cambered surface base plate, the length of length >=piezoelectric ceramic piece that the cancave cambered surface of cancave cambered surface base plate projects on bottom surface, the width of width >=piezoelectric ceramic piece that the cancave cambered surface of cancave cambered surface base plate projects on bottom surface, it is a parabola that cancave cambered surface is perpendicular to the cross sectional shape of width, parabolical P value is between 187.3 ~ 328.5；At the highest point of cancave cambered surface, with boss opposite face distance for length, cancave cambered surface width is wide, excises downwards the groove stopper slot as piezoelectric ceramic piece of deep 2 ~ 5mm；Cancave cambered surface base plate is perpendicular to the both sides in cambered surface axle center, couples the rectangle baffle plate identical with cancave cambered surface floor length in order to limit the position of piezoelectric ceramic piece with lag bolt.
3. pressure type piezo-electric generating assembly in iso-stress cantilever lever according to claim 1, it is characterized in that: actively briquetting is to distance is elastic rod jib-length the 1/10 ~ 1/2 of bending part, in the vertical direction, the height of the aspect ratio stay bolt upper surface of described active briquetting upper surface is high by 0.2 ~ 1.8mm。
4. pressure type piezo-electric generating assembly in iso-stress cantilever lever according to claim 1, it is characterised in that: described cancave cambered surface base plate is plastic material.
5. pressure type piezo-electric generating assembly in iso-stress cantilever lever according to claim 1, it is characterised in that: described cancave cambered surface base plate is wood materials.
6. pressure type piezo-electric generating assembly in iso-stress cantilever lever according to claim 1, it is characterised in that: described cancave cambered surface base plate is ceramic material.
7. pressure type piezo-electric generating assembly in iso-stress cantilever lever according to claim 1, it is characterised in that: described cancave cambered surface base plate is glass material.
8. pressure type piezo-electric generating assembly in the iso-stress cantilever lever according to any bar in claim 1 ~ 7, it is characterised in that: described active briquetting and driven briquetting are plastic material.
9. pressure type piezo-electric generating assembly in the iso-stress cantilever lever according to any bar in claim 1 ~ 7, it is characterised in that: described active briquetting and driven briquetting are wood materials.
10. pressure type piezo-electric generating assembly in the iso-stress cantilever lever according to any bar in claim 1 ~ 7, it is characterised in that: described active briquetting and driven briquetting are ceramic material or glass material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610259191.2A CN105743389B (en) | 2016-04-25 | 2016-04-25 | Pressure type piezo-electric generating component in iso-stress cantilever lever |
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| CN201610259191.2A CN105743389B (en) | 2016-04-25 | 2016-04-25 | Pressure type piezo-electric generating component in iso-stress cantilever lever |
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| CN105743389B CN105743389B (en) | 2018-03-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100194243A1 (en) * | 2009-02-02 | 2010-08-05 | Fujifilm Corporation | Vibration sensor film, vibration actuator film, vibration reduction film, and multilayer film using them |
| CN203406804U (en) * | 2013-06-30 | 2014-01-22 | 浙江师范大学 | Cantilever-beam based longitudinal vibration piezoelectric generation apparatus |
| US20140062256A1 (en) * | 2012-09-05 | 2014-03-06 | Texas Instruments Incorporated | Piezoelectric device |
| CN104092407A (en) * | 2014-08-06 | 2014-10-08 | 苏州科技学院 | Equal-deformation cantilever lever type piezoelectric power generation component |
| CN205545007U (en) * | 2016-04-25 | 2016-08-31 | 苏州科技学院 | Equal stress cantilever lever middling pressure formula piezoelectricity electricity generation subassembly |
-
2016
- 2016-04-25 CN CN201610259191.2A patent/CN105743389B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100194243A1 (en) * | 2009-02-02 | 2010-08-05 | Fujifilm Corporation | Vibration sensor film, vibration actuator film, vibration reduction film, and multilayer film using them |
| US20140062256A1 (en) * | 2012-09-05 | 2014-03-06 | Texas Instruments Incorporated | Piezoelectric device |
| CN203406804U (en) * | 2013-06-30 | 2014-01-22 | 浙江师范大学 | Cantilever-beam based longitudinal vibration piezoelectric generation apparatus |
| CN104092407A (en) * | 2014-08-06 | 2014-10-08 | 苏州科技学院 | Equal-deformation cantilever lever type piezoelectric power generation component |
| CN205545007U (en) * | 2016-04-25 | 2016-08-31 | 苏州科技学院 | Equal stress cantilever lever middling pressure formula piezoelectricity electricity generation subassembly |
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Inventor after: Qian Mi Inventor after: Fan Yilun Inventor after: Li Yan Inventor after: Yin Zhen Inventor after: Yang Xinming Inventor after: Huang Yuwen Inventor after: Su Lei Inventor after: Xu Jian Inventor after: Hu Qingzhu Inventor after: Li Linrong Inventor before: Qian Mi Inventor before: Zhang Shuai Inventor before: Yang Xinming Inventor before: Bo Jie Inventor before: Wang Bangfu Inventor before: Qi Fangjuan Inventor before: Zhang Lei Inventor before: Liu Qinyun Inventor before: Zhu Zhanjun Inventor before: Wu Lei |
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Granted publication date: 20180313 Termination date: 20190425 |