CN111180569A - Road surface energy harvesting device based on cylindrical piezoelectric ceramic structure - Google Patents
Road surface energy harvesting device based on cylindrical piezoelectric ceramic structure Download PDFInfo
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- CN111180569A CN111180569A CN201911400437.3A CN201911400437A CN111180569A CN 111180569 A CN111180569 A CN 111180569A CN 201911400437 A CN201911400437 A CN 201911400437A CN 111180569 A CN111180569 A CN 111180569A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 54
- 238000003306 harvesting Methods 0.000 title claims abstract description 35
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- 239000004677 Nylon Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C9/00—Special pavings; Pavings for special parts of roads or airfields
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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
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
The invention provides a road surface energy harvesting device based on a cylindrical piezoelectric ceramic structure. Compared with the traditional road surface energy harvesting device, the device is simple and easy to realize high-efficiency large-scale production, and the service life of the piezoelectric ceramics under the traffic environments of high stress circulation, much rainwater, easy chemical corrosion, illumination and the like is prolonged. In order to verify the feasibility of the road piezoelectric energy harvesting device, a loading experiment is carried out through a UTM testing machine, and the energy generated by the device under the action of standard axle load can be used for supplying power for a low-power sensor, so that the device has a certain engineering application value.
Description
Technical Field
The invention relates to the field of energy harvesting, in particular to a road surface energy harvesting device based on a cylindrical piezoelectric ceramic structure.
Background
The large-scale construction of traffic provides important support for social development and economic construction, but various lighting and signal indicating devices consume huge energy in the construction process and the operation period. According to related reports, the oil consumption of the 2010 Chinese transportation industry accounts for 38.2% of the national oil demand, and the transportation industry is a high-energy-consumption industry. On the other hand, the intelligent traffic concept is proposed, and more low-power intelligent sensors are applied to health monitoring of traffic structures, intelligent acquisition of traffic information, application of car networking technology and the like, so that energy consumption in a road operation period is further increased. The ever-increasing energy demand of the traffic industry brings a severe test to the traditional non-renewable energy sources such as coal, petroleum, natural gas and the like. Therefore, research and development and application of new energy become the current international hot research direction, and green energy has gained wide attention at home and abroad due to the characteristics of energy conservation, environmental protection, repeated regeneration, environmental friendliness and the like.
The piezoelectric effect can be used for converting mechanical energy brought by the load of vehicles and pedestrians reciprocating in the road into electric energy. The piezoelectric energy harvesting technology can recycle and utilize waste and underutilized mechanical energy widely existing in road environment to generate considerable electric energy which is supplied as part of energy consumption during road construction and operation. Meanwhile, the self-energy supply mode can overcome the defects that the battery life of the traditional sensing device is limited and the traditional sensing device needs to be continuously replaced for the intelligent sensing device with low energy consumption.
At present, cymbals, bridge, sheet and cantilever beam type piezoelectric ceramic structures are mostly adopted as core components in the research and development of the pavement piezoelectric energy harvesting technology, and most of the structures are based on d of piezoelectric ceramics31The energy harvesting mode can generate higher energy, but the energy harvesting mode is easy to cause large deformation and fatigue failure of the piezoelectric ceramics under the action of repeated load. Meanwhile, most of the traditional pavement piezoelectric energy harvesting devices do not fully consider the complexity of the road environment in the application field, have complex structures and are not beneficial to preparation and large-scale mass production.
Disclosure of Invention
Aiming at the defects of the prior art, the invention designs a road surface energy harvesting device based on a cylindrical piezoelectric ceramic structure, which can convert mechanical energy generated by the reciprocating running of a vehicle on a road surface into electric energy. Wherein, the cylinderThe structure of the piezoelectric ceramic can make the piezoelectric ceramic have higher efficiency d33The piezoelectric mode is used for collecting road surface energy, and meanwhile, compared with the traditional cymbals, bridge structures and the like, the piezoelectric mode has higher pressure bearing performance and durability.
The technical scheme adopted by the invention for solving the technical problem is as follows: a pavement piezoelectric energy harvesting device based on a cylindrical piezoelectric ceramic structure comprises cylindrical piezoelectric ceramics, a conductive material and a piezoelectric ceramic protection device. The piezoelectric ceramic protection device comprises an upper cover plate and a lower substrate, the conducting layer comprises an upper conducting layer and a lower conducting layer, the piezoelectric ceramic is cylindrical and is arranged between the upper conducting layer and the lower conducting layer, and the piezoelectric ceramic protection device is filled with insulating waterproof materials.
Further, the cylindrical piezoelectric ceramic is a PZT-5H type piezoelectric ceramic material, and is polarized along the thickness direction.
Furthermore, the upper and lower conducting layers are made of copper foil materials, the upper conducting layer is divided into a plurality of spaced parts according to the arrangement position of the piezoelectric ceramics, and the upper conducting layers are connected through conducting wires.
Further, the piezoelectric ceramic protection device is made of MC nylon.
Furthermore, the insulating waterproof material is epoxy resin electronic pouring sealant.
Furthermore, a circular hole is reserved on one side of the MC nylon lower substrate for the inner lead to penetrate out.
Furthermore, the cylindrical piezoelectric ceramics are distributed between the upper conducting layer and the lower conducting layer at equal intervals in a certain matrix form and are connected in parallel.
The invention has the beneficial effects that: compared with the traditional road surface energy harvesting device, the road surface energy harvesting device based on the cylindrical piezoelectric ceramic structure can be more suitable for the influence factors of high stress cycle effect, much rainwater, easiness in chemical corrosion, illumination and other traffic environments in a road, and the service life of the piezoelectric ceramic is long; the device has simple structure and is beneficial to high-efficiency large-scale production.
Drawings
FIG. 1 is a schematic longitudinal sectional view of a cylindrical piezoelectric ceramic.
Fig. 2 is a schematic structural diagram of a pavement piezoelectric energy harvesting device.
Fig. 3 is a schematic view of a lighting experiment of a piezoelectric energy harvesting device in a simulated road surface loading environment.
Fig. 4 is a schematic diagram of a layout mode of a pavement piezoelectric energy harvesting device in an actual road.
FIG. 5 is a partial graph of the output voltage waveform of the monolithic piezoelectric ceramic under the action of a 90km/h vehicle load.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments, and the objects and effects of the invention will become more apparent. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-2, the present embodiment provides a road surface energy harvesting device 10, which includes a piezoelectric ceramic 3, conductive layers 4-5, and piezoelectric ceramic protection devices 6-8. The piezoelectric ceramic protection device 6-8 comprises a lower substrate 7 and an upper cover plate 6, the conducting layer 4-5 comprises an upper conducting layer 4 and a lower conducting layer 5, the piezoelectric ceramic 3 is cylindrical piezoelectric ceramic and is arranged between the upper conducting layer 4 and the lower conducting layer 5, and the piezoelectric ceramic protection device 6-8 is internally filled with an insulating waterproof material 8.
Furthermore, the cylindrical piezoelectric ceramic 3 is a PZT-5H type piezoelectric ceramic material with the diameter of 2rPIs 20mm and has a thickness hP5mm, and the polarization is carried out along the thickness direction, and specific piezoelectric performance parameters are detailed in table 1.
TABLE 1 cylindrical piezoelectric ceramic Performance parameter Table
Furthermore, the cylindrical piezoelectric ceramics 3 are arranged between the upper conducting layer 4 and the lower conducting layer 5 at equal intervals in a matrix form of 3 × 3, the upper conducting layer 4 is closely attached to the positive electrode terminal 2 of the piezoelectric ceramics 3, the lower conducting layer 5 is closely attached to the negative electrode terminal of the piezoelectric ceramics 3, and the center distance between the adjacent cylindrical piezoelectric ceramics 3 is 60 mm.
Furthermore, the upper and lower conductive layers 4-5 are made of copper foil materials, and in order to fill the insulating waterproof material 8, the upper conductive layer 4 is divided into a plurality of spaced blocks according to the arrangement position of the piezoelectric ceramic 3. Wherein, the size of the upper conducting layer 4 is 160mm 30mm 0.02mm, and the size of the lower conducting layer 5 is 60mm 150mm 0.02 mm.
Furthermore, the insulating waterproof material 8 is epoxy resin electronic pouring sealant.
Further, the overall external dimension of the MC nylon upper cover plate 6 and the lower substrate 7 is 300mm × 60mm, and this embodiment provides only one design dimension, which mainly plays a role of protecting the cylindrical piezoelectric ceramic 3, and at the same time, can effectively transmit the vehicle load 14 acting on the surface thereof to the piezoelectric ceramic 3, and in practical applications, the dimension can be adjusted according to the situation.
Furthermore, a circular hole 9 with the diameter of 5mm is reserved on one side of the lower substrate 7 so that an internal lead can penetrate out after being connected with the upper and lower conductive layers 4-5, and at the moment, 9 pieces of cylindrical piezoelectric ceramics 3 arranged in the MC nylon substrate 7 are connected in parallel.
Referring to fig. 3, in order to verify the feasibility of the road surface energy harvesting device 10 of the present embodiment, a test verification is performed, and the specific verification steps are as follows:
(1) the device 10 is placed in a UTM tester 11 for loading;
(2) connecting a lead which penetrates out of the preset hole 9 with the LED bulb group 12;
(3) and starting the UTM testing machine 11, and observing the condition that the LED bulb group 12 is lighted under the specific loading frequency and the specific loading magnitude.
Under the action of a sinusoidal load with the frequency of 10Hz and the loading size of standard axial load (0.7MPa), the prepared road piezoelectric energy harvesting device 10 successfully lights an LED bulb set 12 consisting of 20 parallel f5 blue light emitting diodes, and the bulb set 12 is in a continuous flashing state.
Referring to the attached figure 4, in order to verify the energy output effect of the road surface energy harvesting device 10, the piezoelectric energy harvesting device 10 is laid on a bidirectional eight-lane highway with the total length of 150km, and is arranged every 2.5m along the wheel track belt 13 of each lane for analysis.
Taking the A-class vehicle 14 which is the most used vehicle type in China as an example, the wheelbase L of the A-class vehicle isaTaking 2.5m and the distance between vehicles as the safe distance L of the vehiclesDAt 75m, when the action frequency of the front and rear wheels on the road piezoelectric energy harvesting device 10 is 10Hz, the equivalent speed can be 1/T-v/L according to the formulaaCalculated to be 90 km/h.
Referring to fig. 5, when monolithic piezoelectric ceramic 3 is analyzed, according to the UTM loading experiment in example 2, monolithic piezoelectric ceramic 3 can output 0.7mW of maximum average power under the loading conditions of 10Hz and 0.7MPa, and the time interval between the front and rear wheels of vehicle 14 in fig. 4 is T75/25-3 s, so that monolithic piezoelectric ceramic 3 can generate 24 μ W of average power in a single action period.
By combining the above analysis, assuming that the class-A vehicle 14 is fully distributed on a bidirectional eight-lane highway with a total length of 150km according to a safe distance and runs at a constant speed of 90km/h, the energy loss problem in practical application is not considered, and the average generated electric quantity per hour of all the on-road piezoelectric energy harvesting devices 10 buried in the total length of the road can be estimated to be
Thus proving that the road surface energy harvesting device can meet the use requirement.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and although the invention has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that various changes in the form and details of the embodiments may be made and equivalents may be substituted for elements thereof. All modifications, equivalents and the like which come within the spirit and principle of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The utility model provides a road surface energy harvesting device based on cylindrical piezoceramics structure, road surface energy harvesting device includes piezoceramics, conducting layer and piezoceramics protection device, its characterized in that, piezoceramics protection device includes upper cover plate and lower floor's base plate, the conducting layer include conducting layer and conducting layer down, piezoceramics be cylindrical piezoceramics, set up at the upper conducting layer under and between the conducting layer, just piezoceramics protection device inside packing insulating waterproof material.
2. The cylindrical piezoelectric ceramic structure-based road surface energy harvesting device according to claim 1, wherein the piezoelectric ceramic is a PZT-5H type piezoelectric ceramic material and is polarized along the thickness direction.
3. The cylindrical piezoelectric ceramic structure-based road surface energy harvesting device according to claim 1, wherein the upper and lower conductive layers are both made of copper foil materials, the upper conductive layer is divided into a plurality of spaced apart pieces according to the arrangement position of the piezoelectric ceramic, and the upper conductive layers are connected through a wire.
4. The cylindrical piezoelectric ceramic structure-based road surface energy harvesting device according to claim 3, wherein the piezoelectric ceramic protection device is made of MC nylon.
5. The cylindrical piezoelectric ceramic structure-based road surface energy harvesting device according to claim 1, wherein the insulating waterproof material is an epoxy resin electronic potting adhesive.
6. The cylindrical piezoelectric ceramic structure-based road surface energy harvesting device according to claim 1, wherein a circular hole is reserved on one side of the lower substrate for an internal lead to pass through.
7. The cylindrical piezoelectric ceramic structure-based road surface energy harvesting device is characterized in that the cylindrical piezoelectric ceramics are distributed between the upper conducting layer and the lower conducting layer at equal intervals in a certain matrix form and are connected in parallel.
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| CN201911400437.3A CN111180569A (en) | 2019-12-30 | 2019-12-30 | Road surface energy harvesting device based on cylindrical piezoelectric ceramic structure |
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| CN201911400437.3A CN111180569A (en) | 2019-12-30 | 2019-12-30 | Road surface energy harvesting device based on cylindrical piezoelectric ceramic structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952434A (en) * | 2020-07-08 | 2020-11-17 | 温州大学 | Packaged piezoelectric conversion device and manufacturing method thereof |
| CN112217418A (en) * | 2020-09-01 | 2021-01-12 | 长安大学 | Assembled road piezoelectric power generation system and paving method |
| US20240026611A1 (en) * | 2019-04-08 | 2024-01-25 | University Of South Florida | Piezeoelectric-based asphalt layer for energy harvesting roadway |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938622A (en) * | 2012-10-30 | 2013-02-20 | 苏州市职业大学 | Piezoelectric energy harvesting unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938622A (en) * | 2012-10-30 | 2013-02-20 | 苏州市职业大学 | Piezoelectric energy harvesting unit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20240026611A1 (en) * | 2019-04-08 | 2024-01-25 | University Of South Florida | Piezeoelectric-based asphalt layer for energy harvesting roadway |
| CN111952434A (en) * | 2020-07-08 | 2020-11-17 | 温州大学 | Packaged piezoelectric conversion device and manufacturing method thereof |
| CN112217418A (en) * | 2020-09-01 | 2021-01-12 | 长安大学 | Assembled road piezoelectric power generation system and paving method |
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Application publication date: 20200519 |