CN108448936B - Complementary six-stage circular arc piezoelectric energy collector - Google Patents
Complementary six-stage circular arc piezoelectric energy collector Download PDFInfo
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- CN108448936B CN108448936B CN201810408686.6A CN201810408686A CN108448936B CN 108448936 B CN108448936 B CN 108448936B CN 201810408686 A CN201810408686 A CN 201810408686A CN 108448936 B CN108448936 B CN 108448936B
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- 230000000295 complement effect Effects 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 claims description 25
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 229910000906 Bronze Inorganic materials 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 239000010974 bronze Substances 0.000 claims description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 230000005284 excitation Effects 0.000 abstract description 6
- 230000010354 integration Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001259 photo etching Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
- H02N2/188—Vibration harvesters adapted for resonant operation
Abstract
The invention discloses a complementary six-stage arc piezoelectric energy collector, which comprises a first group of cantilever beams and a second group of cantilever beams which are symmetrical to each other, wherein the first group of cantilever beams and the second group of cantilever beams are connected through a fixed mass block. The first group of cantilever beams comprises a first cantilever beam, a second cantilever beam and a third cantilever beam which are sleeved in sequence, the left ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are connected with the adjustable mass block, and the right ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are connected with the fixed mass block. Compared with the traditional piezoelectric energy collector, when excitation acts on a mass block, the circular arc piezoelectric energy collector with a specific radian can generate energy with higher power, and meanwhile, the piezoelectric energy collector can also improve the space utilization rate of a device, improve the integration level and enhance the stability, and has higher research value.
Description
Technical Field
The invention relates to a complementary six-stage arc piezoelectric energy collector, and belongs to the technical field of energy collection.
Background
The piezoelectric energy collector converts mechanical energy which cannot be directly utilized in the surrounding environment into electric energy which can be directly utilized by utilizing a piezoelectric effect mode. The piezoelectric energy collector commonly used at present is usually in a straight structure, and the piezoelectric energy collector can play a role in energy collection under the structure, but experiments show that the frequency range of the collectable energy is smaller, and the output potential is lower. In addition, the piezoelectric energy collector with the straight structure has a series of defects of low stability, low space utilization and the like. The double-degree-of-freedom circular arc piezoelectric energy collector is applied to the top surface or the side surface of the mass block through external vibration, the cantilever beam vibrates and deforms, and the piezoelectric layer generates electric potential, so that the frequency range for collecting energy and the power intensity for outputting energy are improved to a certain extent, but the actual operation condition is considered, and the simple circular arc piezoelectric energy collector is difficult to meet the actual energy collection requirement.
The high-performance circular arc piezoelectric energy collector outputs high potential under a certain radian, and has large first-order frequency and long multi-order bandwidth. The circular arc piezoelectric energy collector with double degrees of freedom generates high potential under a certain radian, has small first-order frequency and short multi-order bandwidth, but both solve the singleness of the energy absorption direction, and can absorb vibration energy of the top surface and the side surface of the mass block. The third-order intelligent circular arc piezoelectric energy collector has the advantages that the high-performance circular arc piezoelectric energy collector and the double-degree-of-freedom circular arc piezoelectric energy collector can absorb vibration energy in the directions of the top surface and the side surface, meanwhile, the energy collecting range and the output potential are improved to a certain extent, the circular arc piezoelectric layers can not be symmetrically cascaded while the energy absorption of the top surface and the side surface is realized, and the working frequency bandwidth, the output potential and the device stability of the energy collector are further improved.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a complementary six-stage arc piezoelectric energy collector.
The aim of the invention is achieved by the following technical scheme: the complementary six-stage arc piezoelectric energy collector comprises a first group of cantilever beams and a second group of cantilever beams which are symmetrical to each other, wherein the first group of cantilever beams and the second group of cantilever beams are connected through a fixed mass block.
Preferably, the first group of cantilever beams comprises a first cantilever beam, a second cantilever beam and a third cantilever beam which are sleeved in sequence, the radius of the first cantilever beam is R1, the radius of the second cantilever beam is R2, the radius of the third cantilever beam is R3, the radius R1 of the first cantilever beam is smaller than the radius R2 of the second cantilever beam, and the radius R2 of the second cantilever beam is smaller than the radius R3 of the third cantilever beam.
Preferably, the left ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are all connected with the adjustable mass block, and the right ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are all connected with the fixed mass block.
Preferably, the first cantilever beam is a first arc-shaped sheet with the radian of 180 degrees, a first piezoelectric layer is attached to the first arc-shaped sheet, the first piezoelectric layer is an arc-shaped material layer, the second cantilever beam is a second arc-shaped sheet with the radian of 180 degrees, a second piezoelectric layer is attached to the second arc-shaped sheet, the second piezoelectric layer is an arc-shaped material layer, the third cantilever beam is a first arc-shaped sheet with the radian of 180 degrees, a third piezoelectric layer is attached to the third arc-shaped sheet, the third piezoelectric layer is an arc-shaped material layer, and a heat-adjustable gauge block is movably arranged above the first piezoelectric layer, the second piezoelectric layer and the third piezoelectric layer.
Preferably, the second group of cantilever beams includes a fourth cantilever beam, a fifth cantilever beam and a sixth cantilever beam which are sleeved in sequence, the radius of the fourth cantilever beam is R4, the radius of the fifth cantilever beam is R5, the radius of the sixth cantilever beam is R6, the radius R4 of the fourth cantilever beam is smaller than the radius R5 of the fifth cantilever beam, and the radius R5 of the fifth cantilever beam is smaller than the radius R6 of the sixth cantilever beam.
Preferably, the left ends of the fourth cantilever beam, the fifth cantilever beam and the sixth cantilever beam are all connected with the fixed mass block, and the right ends of the fourth cantilever beam, the fifth cantilever beam and the sixth cantilever beam are all connected with the metal fixed end.
Preferably, the fourth cantilever beam is a fourth arc-shaped sheet with the radian of 180 degrees, a fourth piezoelectric layer is attached to the fourth arc-shaped sheet, the fourth piezoelectric layer is an arc-shaped material layer, the fifth cantilever beam is a fifth arc-shaped sheet with the radian of 180 degrees, a fifth piezoelectric layer is attached to the fifth arc-shaped sheet, the fifth piezoelectric layer is an arc-shaped material layer, the sixth cantilever beam is a sixth arc-shaped sheet with the radian of 180 degrees, a sixth piezoelectric layer is attached to the sixth arc-shaped sheet, the sixth piezoelectric layer is an arc-shaped material layer, and adjustable mass blocks are movably arranged above the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer.
Preferably, the first circular arc-shaped sheet has an inner diameter of 20mm, an outer diameter of 30mm, a width of 10mm and an arc degree of 120 degrees; the inner diameter of the second circular arc-shaped sheet is 20mm, the outer diameter of the second circular arc-shaped sheet is 30mm, the width of the second circular arc-shaped sheet is 10mm, and the radian of the second circular arc-shaped sheet is 120 degrees; the inner diameter of the third circular arc-shaped sheet is 20mm, the outer diameter of the third circular arc-shaped sheet is 30mm, the width of the third circular arc-shaped sheet is 10mm, the radian of the third circular arc-shaped sheet is 120 degrees, the interval between the first circular arc-shaped sheet and the second circular arc-shaped sheet is 1mm, and the interval between the second circular arc-shaped sheet and the third circular arc-shaped sheet is 1mm; the inner diameter of the fourth arc-shaped sheet is 20mm, the outer diameter of the fourth arc-shaped sheet is 30mm, the width of the fourth arc-shaped sheet is 10mm, and the radian of the fourth arc-shaped sheet is 120 degrees; the inner diameter of the fifth arc-shaped sheet is 20mm, the outer diameter of the fifth arc-shaped sheet is 30mm, the width of the fifth arc-shaped sheet is 10mm, and the radian of the fifth arc-shaped sheet is 120 degrees; the inner diameter of the sixth circular arc-shaped sheet is 20mm, the outer diameter of the sixth circular arc-shaped sheet is 30mm, the width of the sixth circular arc-shaped sheet is 10mm, the radian of the sixth circular arc-shaped sheet is 120 degrees, the interval between the fourth circular arc-shaped sheet and the fifth circular arc-shaped sheet is 1mm, and the interval between the fifth circular arc-shaped sheet and the sixth circular arc-shaped sheet is 1mm.
Preferably, the cantilever beam is made of phosphor bronze material; the fixed mass block and the adjustable mass block are made of nickel materials, and the length, the width and the height of the fixed mass block and the adjustable mass block are respectively 10mm.
Preferably, the first piezoelectric layer, the second piezoelectric layer, the third piezoelectric layer, the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer are all PZT-5H; the radian of the first piezoelectric layer, the second piezoelectric layer, the third piezoelectric layer, the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer is 120 degrees, the inner diameters of the first piezoelectric layer, the second piezoelectric layer, the third piezoelectric layer, the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer are 20mm, the outer diameters are 30mm, and the thicknesses are 0.3mm. The technical scheme of the invention has the advantages that: according to the complementary six-stage arc piezoelectric energy collector, six piezoelectric layers are symmetrically cascaded, and under the condition that an external excitation load is unchanged, the area of the piezoelectric layers can be effectively increased, so that the energy collector can absorb, convert and transmit more energy. Compared with the traditional piezoelectric energy collecting device, the output potential of the complementary six-stage circular arc piezoelectric energy collector is obviously increased.
For the mass blocks with the same size, the complementary six-stage circular arc piezoelectric energy collector of the technical scheme symmetrically cascades six piezoelectric layers, and the traditional piezoelectric energy collector usually only has one to two piezoelectric layers, which means that the energy collector structure of the technical scheme effectively improves the space utilization rate, and further improves the integration level of the technical scheme serving as an integrated unit small module of the piezoelectric integrated chip.
Compared with the traditional piezoelectric energy collector, the complementary six-stage arc piezoelectric energy collector has the advantages that the first-order resonant frequency is lower, the effective working frequency band bandwidth is greatly improved, and the multi-order bandwidth is shorter. Therefore, the device can be well matched with the vibration environment of a low-frequency multi-source, and the broadband effect is better realized.
In the complementary type six-stage arc piezoelectric energy collector, the six cantilever beams and the adjustable mass are symmetrical about the fixed mass block positioned in the center of the device, so that the complementary type six-stage arc piezoelectric energy collector has good symmetry, and the complementary type six-stage arc piezoelectric energy collector has better stability.
According to the technical scheme, the complementary six-stage arc piezoelectric energy collector can be used for respectively designing the positions of six adjustable mass blocks on each piezoelectric layer, so that the frequency of the energy which can be collected by the piezoelectric layers is controlled to be one point, and high-power energy transmission is realized.
Because MEMS is based on photoetching and sputtering processes, compared with a traditional piezoelectric energy collector structure, the complementary six-stage arc piezoelectric energy collector of the technical scheme is built and simplified into 2 layers from 6 layers, and the mass block and the connecting sheet are uniformly simplified into an arc shape, so that the process manufacturing process is greatly simplified.
Drawings
Fig. 1 is a schematic structural diagram of a complementary six-stage arc piezoelectric energy collector according to the present invention.
Fig. 2 is a top view of the structure of the complementary six-stage circular arc piezoelectric energy collector of the present invention.
FIG. 3 is a graph of first order energy output power versus frequency for a complementary six-stage circular arc piezoelectric energy harvester of the present invention.
Fig. 4 is a graph of second order energy output power versus frequency for a complementary six-stage circular arc piezoelectric energy harvester of the present invention.
Fig. 5 is a graph of the third order energy output power versus frequency of a complementary six-stage circular arc piezoelectric energy harvester of the present invention.
FIG. 6 is a graph of fourth order energy output power versus frequency for a complementary six-stage circular arc piezoelectric energy harvester of the present invention.
Fig. 7 is a graph of the fifth order energy output power versus frequency of a complementary six-stage circular arc piezoelectric energy harvester of the present invention.
Fig. 8 is a graph of the sixth order energy output power versus frequency of a complementary sixth order circular arc piezoelectric energy harvester of the present invention.
FIG. 9 is a graph of high power energy versus frequency that can be output by a complementary six-stage circular arc piezoelectric energy harvester of the present invention.
Detailed Description
The objects, advantages and features of the present invention are illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are only typical examples of the technical scheme of the invention, and all technical schemes formed by adopting equivalent substitution or equivalent transformation fall within the scope of the invention.
The invention discloses a complementary six-stage arc piezoelectric energy collector, which comprises a first group of cantilever beams 100 and a second group of cantilever beams 200 which are symmetrical to each other, wherein the first group of cantilever beams and the second group of cantilever beams are connected through a fixed mass block 300 as shown in fig. 1 and 2.
As shown in fig. 1, the first group of cantilever beams 100 includes a first cantilever beam 10, a second cantilever beam 20 and a third cantilever beam 30 that are sleeved in sequence, where the radius of the first cantilever beam is R1, the radius of the second cantilever beam is R2, the radius of the third cantilever beam is R3, the radius R1 of the first cantilever beam is smaller than the radius R2 of the second cantilever beam, and the radius R2 of the second cantilever beam is smaller than the radius R3 of the third cantilever beam. The left ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are all connected with the adjustable mass block 400, and the right ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are all connected with the fixed mass block 500. According to the technical scheme, the complementary six-stage arc piezoelectric energy collector can be used for respectively designing the positions of six adjustable mass blocks on each piezoelectric layer, so that the frequency of the energy which can be collected by the piezoelectric layers is controlled to be one point, and high-power energy transmission is realized.
Because MEMS is based on photoetching and sputtering processes, compared with a traditional piezoelectric energy collector structure, the complementary six-stage arc piezoelectric energy collector of the technical scheme is built and simplified into 2 layers from 6 layers, and the mass block and the connecting sheet are uniformly simplified into an arc shape, so that the process manufacturing process is greatly simplified. For the mass blocks with the same size, the complementary six-stage circular arc piezoelectric energy collector of the technical scheme symmetrically cascades six piezoelectric layers, and the traditional piezoelectric energy collector usually only has one to two piezoelectric layers. This means that the energy collector structure of this technical scheme has improved space utilization effectively, and then has improved the integrated level that this technical scheme was as the integrated unit small module of piezoelectricity integrated chip.
The first cantilever 10 is a first arc-shaped sheet with the radian of 180 degrees, a first piezoelectric layer 11 is attached to the first arc-shaped sheet, the first piezoelectric layer is an arc-shaped material layer, the second cantilever 20 is a second arc-shaped sheet with the radian of 180 degrees, a second piezoelectric layer 21 is attached to the second arc-shaped sheet, the second piezoelectric layer is an arc-shaped material layer, a third cantilever 30 is a first arc-shaped sheet with the radian of 180 degrees, a third piezoelectric layer 31 is attached to the third arc-shaped sheet, a circular arc-shaped material layer is arranged on the third piezoelectric layer, and a tunable mass block 400 is movably arranged above the first piezoelectric layer, the second piezoelectric layer and the third piezoelectric layer. The inner diameter of the first arc-shaped sheet is 20mm, the outer diameter of the first arc-shaped sheet is 30mm, the width of the first arc-shaped sheet is 10mm, and the radian of the first arc-shaped sheet is 120 degrees; the inner diameter of the second circular arc-shaped sheet is 20mm, the outer diameter of the second circular arc-shaped sheet is 30mm, the width of the second circular arc-shaped sheet is 10mm, and the radian of the second circular arc-shaped sheet is 120 degrees; the inner diameter of the third circular arc-shaped sheet is 20mm, the outer diameter of the third circular arc-shaped sheet is 30mm, the width of the third circular arc-shaped sheet is 10mm, the radian of the third circular arc-shaped sheet is 120 degrees, the interval between the first circular arc-shaped sheet and the second circular arc-shaped sheet is 1mm, and the interval between the second circular arc-shaped sheet and the third circular arc-shaped sheet is 1mm.
The second set of cantilever beams 200 includes a fourth cantilever beam 40, a fifth cantilever beam 50 and a sixth cantilever beam 60 that are sleeved in sequence, where the radius of the fourth cantilever beam is R4, the radius of the fifth cantilever beam is R5, the radius of the sixth cantilever beam is R6, the radius R4 of the fourth cantilever beam is smaller than the radius R5 of the fifth cantilever beam, and the radius R5 of the fifth cantilever beam is smaller than the radius R6 of the sixth cantilever beam. The left ends of the fourth cantilever beam, the fifth cantilever beam and the sixth cantilever beam are all connected with the fixed mass block, and the right ends of the fourth cantilever beam, the fifth cantilever beam and the sixth cantilever beam are all connected with the metal fixed end 600.
The fourth cantilever beam 40 is a fourth arc-shaped sheet with the radian of 180 degrees, a fourth piezoelectric layer 41 is attached to the fourth arc-shaped sheet, the fourth piezoelectric layer is an arc-shaped material layer, the fifth cantilever beam 50 is a fifth arc-shaped sheet with the radian of 180 degrees, a fifth piezoelectric layer 51 is attached to the fifth arc-shaped sheet, the fifth piezoelectric layer is an arc-shaped material layer, the sixth cantilever beam 60 is a sixth arc-shaped sheet with the radian of 180 degrees, a sixth piezoelectric layer 61 is attached to the sixth arc-shaped sheet, the sixth piezoelectric layer is an arc-shaped material layer, and adjustable mass blocks are movably arranged above the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer.
The inner diameter of the fourth arc-shaped sheet is 20mm, the outer diameter of the fourth arc-shaped sheet is 30mm, the width of the fourth arc-shaped sheet is 10mm, and the radian of the fourth arc-shaped sheet is 120 degrees; the inner diameter of the fifth arc-shaped sheet is 20mm, the outer diameter of the fifth arc-shaped sheet is 30mm, the width of the fifth arc-shaped sheet is 10mm, and the radian of the fifth arc-shaped sheet is 120 degrees; the inner diameter of the sixth circular arc-shaped sheet is 20mm, the outer diameter of the sixth circular arc-shaped sheet is 30mm, the width of the sixth circular arc-shaped sheet is 10mm, the radian of the sixth circular arc-shaped sheet is 120 degrees, the interval between the fourth circular arc-shaped sheet and the fifth circular arc-shaped sheet is 1mm, and the interval between the fifth circular arc-shaped sheet and the sixth circular arc-shaped sheet is 1mm.
Six circular arc piezoelectric layers are symmetrically cascaded, under the condition of unchanged external load excitation, the space utilization rate of the structure is improved, the area of the piezoelectric layers for energy conversion and transmission is further increased, the frequency range of the energy collector capable of collecting energy is expanded, the energy can be absorbed, transmitted and converted more widely, and meanwhile, the reliability and stability of the device are improved. By arranging six adjustable mass blocks, three piezoelectric layers absorb the energy of the same frequency at the same time, so that the resonance of the energy is realized, and the purpose of high power transmission of the energy of the specific frequency is achieved.
The cantilever beam is made of phosphor bronze material, the cantilever beam of the structure is in a circular arc-shaped sheet with the radian of 180 degrees, which is made of phosphor bronze material, the inner radius Ra=20 mm, the outer radius Rb=30 mm, the width W=10 mm, and the thickness HS=0.5 mm of the base layer. The fixed mass block and the adjustable mass block are made of nickel materials, the length, the width and the height of the fixed mass block and the adjustable mass block are respectively 10mm, the arc length L=10rad of the fixed mass block and the adjustable mass block is shown, and the height HM=10mm.
The first piezoelectric layer, the second piezoelectric layer, the third piezoelectric layer, the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer are all PZT-5H. The radian of the first piezoelectric layer, the second piezoelectric layer, the third piezoelectric layer, the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer is 120 degrees, the inner diameters of the first piezoelectric layer, the second piezoelectric layer, the third piezoelectric layer, the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer are 20mm, the outer diameters of the first piezoelectric layer, the second piezoelectric layer, the third piezoelectric layer and the fourth piezoelectric layer are 30mm, the thicknesses of the first piezoelectric layer, the third piezoelectric layer and the sixth piezoelectric layer are 0.3mm, and each piezoelectric layer is an arc-shaped sheet which is made of PZT-5H and is 160 degrees in radian.
According to the complementary six-stage arc piezoelectric energy collector, six-stage piezoelectric layers are symmetrically cascaded together, so that the frequency range for collecting energy is effectively enlarged. To highlight the advantage of the large frequency range of the collectable energy of the present invention, a pressure with a boundary load of 10pa was applied as a voltage excitation on top of the mass, summarizing the energy absorption frequencies that could be covered by the piezoelectric layers No. 1, 2, 3, 4, 5, 6, as shown in table 1 below.
TABLE 1 energy absorption frequency units (Hz) that piezoelectric layers can cover
| Piezoelectric layer | Absorbable energy frequency |
| Primary (1) | 90 85 80 73 70 60 55 50 45 40 35 |
| Second grade (2) | 50 49 46 45 44 43 40 39.5 39 36 35 |
| Three-stage (3) | 45 44 43 42 41 40 40 39 38 37 37 |
| Four-stage (4) | 120 110 75 70 50 50 45 44 43.5 43 42 41 40 36 35 30 |
| Five-stage (5) | 310 215 165 130 120 110 105 100 95 90 85 80 75 75 70 70 |
| Six-level (6) | 95 90 85 85 83 80 75 75 73 70 65 |
| Six-stage piezoelectric layer symmetrical cascade | 310 215 165 130 120 100 95 90 85 83 80 75 73 70 65 60 55 50 49 46 45 44 43.5 43 42 41 40 39.5 39 38 37 36 35 30 |
According to the above table 1, the complementary six-stage arc piezoelectric energy collector of the present technical solution combines six piezoelectric layers, so as to greatly expand the frequency range in which the energy collector can collect energy, and improve the bandwidth of the working frequency band. Compared with the traditional first-order and second-order piezoelectric energy collecting device, the piezoelectric energy collector of the technical scheme can be used for absorbing, converting and transmitting energy more widely.
Although six piezoelectric layers attached to the cantilever beam can all play a role in energy collection, the frequency of the energy that can be collected by the piezoelectric layers and the power of the energy transmitted are not the same for the same angle. Applying a pressure with a boundary load of 10pa to the top of the mass block as voltage excitation, changing the movement angle of the adjustable mass block to obtain graphs of output energy power of first order, second order, third order, fourth order, fifth order and sixth order respectively, wherein the graphs are shown in fig. 3, 4, 5, 6, 7 and 8, the graph of the output power of the first order of the piezoelectric energy collector and the graph of the frequency are shown in fig. 3, the graph of the output power of the first order of the piezoelectric energy collector and the graph of the frequency are shown in the abscissa of fig. 3, the graph of the output power of the second order of the piezoelectric energy collector and the graph of the output power of the frequency are shown in the ordinate of fig. 4, the abscissa of the frequency is shown in the graph of the output power of the second order of the piezoelectric energy collector, fig. 5 is a graph of third-order energy output power versus frequency of the piezoelectric energy harvester, fig. 5 is a graph of frequency on the abscissa, and output power on the ordinate, fig. 6 is a graph of fourth-order energy output power versus frequency of the piezoelectric energy harvester, fig. 6 is a graph of frequency on the abscissa, and output power on the ordinate, fig. 7 is a graph of fifth-order energy output power versus frequency of the piezoelectric energy harvester, fig. 7 is a graph of frequency on the abscissa, and fig. 8 is a graph of sixth-order energy output power versus frequency of the piezoelectric energy harvester, fig. 8 is a graph of frequency on the abscissa, and fig. 8 is a graph of energy output power on the ordinate.
As can be seen from an analysis of fig. 3 and 4 and 5 and 6 and 7 and 8, for the first-order piezoelectric layer, there is a maximum power of 0.829W at a frequency of 50 Hz; for a second-order piezoelectric layer, the maximum power is 0.454Hz at the frequency of 44 Hz; for a third-order piezoelectric layer, the maximum power is 0.371W at the frequency of 37 Hz; for a fourth-order piezoelectric layer, the maximum power is 0.024W at the frequency of 41 Hz; for a fifth-order piezoelectric layer, the maximum power is 0.049W at the frequency of 90 Hz; for a sixth order piezoelectric layer, there is a maximum power of 0.041W at a frequency of 70 Hz.
Obviously, for the piezoelectric layers on both sides of the fixed mass, as the order increases, the maximum power value that each piezoelectric layer can individually output is limited. In order to make up for the defect, the complementary six-stage arc piezoelectric energy collector in the technical scheme makes the frequencies of energy transmitted by six piezoelectric layers equal by moving the position of the adjustable mass block on the piezoelectric layers as shown in fig. 2, and at the moment, the energy on the six piezoelectric layers resonates, and the total output energy is the sum of the energy transmitted by the six piezoelectric layers. Therefore, the energy transmission characteristic of controlling the frequency to a point and outputting ultra-high power is realized, meanwhile, the intelligent screening effect is realized on the energy of the frequency, and the piezoelectric energy collector has obvious superiority compared with the traditional piezoelectric energy collector.
In order to better embody the high power transmission advantage of the complementary six-stage circular arc piezoelectric energy collector of the technical scheme for specific frequency energy, the angle of the adjustable mass block is continuously adjusted so that each piezoelectric layer is positioned at the same energy absorption frequency, a relation graph of high energy power and frequency which can be output by the complementary six-stage circular arc piezoelectric energy collector is drawn, as shown in fig. 9, fig. 9 is an image of high power energy and frequency which can be output by the complementary six-stage circular arc piezoelectric energy collector, the abscissa of fig. 9 represents the frequency, and the ordinate represents the energy output power. As can be seen from fig. 9, the frequencies are 50Hz, 45Hz, 44Hz, 43Hz, which correspond to high power outputs of 0.96W, 0.66W, 0.54W, 0.50W, respectively. The power value is obviously higher than the energy power independently output by the voltage layers of one, two, three, four, five and six stages, and meanwhile, the frequency corresponding to the high power output point is below 50 Hz. Therefore, the complementary six-stage arc piezoelectric energy collector has obvious high-power transmission advantage and better low-frequency characteristic.
Compared with the traditional piezoelectric energy collector, the complementary six-stage arc piezoelectric energy collector provided by the technical scheme can be used for multidimensional adjustment of energy absorption under a specific structure, and can control the frequency to one point to output high power while realizing vibration energy absorption in a large frequency range.
Compared with the traditional piezoelectric energy collector, when excitation acts on the mass block, the circular arc piezoelectric energy collector with a specific radian can generate energy with higher power. Meanwhile, the complementary six-stage arc piezoelectric energy collector can also improve the space utilization rate of the device, improve the integration level, enhance the stability and have higher research value.
The invention has various embodiments, and all technical schemes formed by equivalent transformation or equivalent transformation fall within the protection scope of the invention.
Claims (4)
1. A complementary six-stage circular arc piezoelectric energy collector, characterized in that: the cantilever beam comprises a first group of cantilever beams and a second group of cantilever beams which are symmetrical to each other, wherein the first group of cantilever beams and the second group of cantilever beams are connected through a fixed mass block;
the first group of cantilever beams comprises a first cantilever beam, a second cantilever beam and a third cantilever beam which are sleeved in sequence, wherein the radius of the first cantilever beam is R1, the radius of the second cantilever beam is R2, the radius of the third cantilever beam is R3, the radius R1 of the first cantilever beam is smaller than the radius R2 of the second cantilever beam, and the radius R2 of the second cantilever beam is smaller than the radius R3 of the third cantilever beam; the left ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are connected with the adjustable mass block, and the right ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are connected with the fixed mass block; the first cantilever beam is a first arc-shaped sheet with the radian of 180 degrees, a first piezoelectric layer is attached to the first arc-shaped sheet, the first piezoelectric layer is an arc-shaped material layer, the second cantilever beam is a second arc-shaped sheet with the radian of 180 degrees, the second arc-shaped sheet is attached to the second cantilever beam, the second piezoelectric layer is an arc-shaped material layer, the third cantilever beam is a third arc-shaped sheet with the radian of 180 degrees, a third piezoelectric layer is attached to the third arc-shaped sheet, the third piezoelectric layer is an arc-shaped material layer, and adjustable heat blocks are movably arranged above the first piezoelectric layer, the second piezoelectric layer and the third piezoelectric layer;
the second group of cantilever beams comprises a fourth cantilever beam, a fifth cantilever beam and a sixth cantilever beam which are sleeved in sequence, the radius of the fourth cantilever beam is R4, the radius of the fifth cantilever beam is R5, the radius of the sixth cantilever beam is R6, the radius R4 of the fourth cantilever beam is smaller than the radius R5 of the fifth cantilever beam, and the radius R5 of the fifth cantilever beam is smaller than the radius R6 of the sixth cantilever beam; the left ends of the fourth cantilever beam, the fifth cantilever beam and the sixth cantilever beam are connected with the fixed mass block, and the right ends of the fourth cantilever beam, the fifth cantilever beam and the sixth cantilever beam are connected with the metal fixed end; the fourth cantilever beam is a fourth arc-shaped sheet with the radian of 180 degrees, a fourth piezoelectric layer is attached to the fourth arc-shaped sheet, the fourth piezoelectric layer is an arc-shaped material layer,
the fifth cantilever beam is a fifth arc-shaped sheet with the radian of 180 degrees, a fifth piezoelectric layer is attached to the fifth arc-shaped sheet, the fifth piezoelectric layer is an arc-shaped material layer, the sixth cantilever beam is a sixth arc-shaped sheet with the radian of 180 degrees, a sixth piezoelectric layer is attached to the sixth arc-shaped sheet, the sixth piezoelectric layer is an arc-shaped material layer, and a heat-adjustable gauge block is movably arranged above the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer.
2. A complementary six-stage circular arc piezoelectric energy harvester according to claim 1, wherein: the inner diameter of the first arc-shaped sheet is 20mm, the outer diameter of the first arc-shaped sheet is 30mm, the width of the first arc-shaped sheet is 10mm, and the radian of the first arc-shaped sheet is 120 degrees; the inner diameter of the second circular arc-shaped sheet is 20mm, the outer diameter of the second circular arc-shaped sheet is 30mm, the width of the second circular arc-shaped sheet is 10mm, and the radian of the second circular arc-shaped sheet is 120 degrees; the inner diameter of the third circular arc-shaped sheet is 20mm, the outer diameter of the third circular arc-shaped sheet is 30mm, the width of the third circular arc-shaped sheet is 10mm, the radian of the third circular arc-shaped sheet is 120 degrees, the interval between the first circular arc-shaped sheet and the second circular arc-shaped sheet is 1mm, and the interval between the second circular arc-shaped sheet and the third circular arc-shaped sheet is 1mm;
the inner diameter of the fourth arc-shaped sheet is 20mm, the outer diameter of the fourth arc-shaped sheet is 30mm, the width of the fourth arc-shaped sheet is 10mm, and the radian of the fourth arc-shaped sheet is 120 degrees; the inner diameter of the fifth arc-shaped sheet is 20mm, the outer diameter of the fifth arc-shaped sheet is 30mm, the width of the fifth arc-shaped sheet is 10mm, and the radian of the fifth arc-shaped sheet is 120 degrees; the inner diameter of the sixth circular arc-shaped sheet is 20mm, the outer diameter of the sixth circular arc-shaped sheet is 30mm, the width of the sixth circular arc-shaped sheet is 10mm, the radian of the sixth circular arc-shaped sheet is 120 degrees, the interval between the fourth circular arc-shaped sheet and the fifth circular arc-shaped sheet is 1mm, and the interval between the fifth circular arc-shaped sheet and the sixth circular arc-shaped sheet is 1mm.
3. A complementary six-stage circular arc piezoelectric energy harvester according to claim 1, wherein: the cantilever beam is made of phosphor bronze material, the fixed mass block and the adjustable mass block are made of nickel material, and the length, width and height of the fixed mass block and the adjustable mass block are respectively 10mm.
4. A complementary six-stage circular arc piezoelectric energy harvester according to claim 1, wherein: the first piezoelectric layer, the second piezoelectric layer, the third piezoelectric layer, the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer are all PZT-5H, radians of the first piezoelectric layer, the second piezoelectric layer, the third piezoelectric layer, the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer are 120 degrees, inner diameters of the first piezoelectric layer, the second piezoelectric layer, the third piezoelectric layer, the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer are all 20mm, outer diameters of the first piezoelectric layer, the second piezoelectric layer, the third piezoelectric layer, the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer are all 30mm, and thicknesses of the first piezoelectric layer, the second piezoelectric layer, the fourth piezoelectric layer, the fifth piezoelectric layer and the sixth piezoelectric layer are all 0.3mm.
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| CN106984112A (en) * | 2017-04-20 | 2017-07-28 | 武汉理工大学 | Remove haze device in a kind of airport based on noise generation technology |
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