CN111969891A - Novel road lighting system utilizing piezoelectric effect - Google Patents
Novel road lighting system utilizing piezoelectric effect Download PDFInfo
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- CN111969891A CN111969891A CN202010792994.0A CN202010792994A CN111969891A CN 111969891 A CN111969891 A CN 111969891A CN 202010792994 A CN202010792994 A CN 202010792994A CN 111969891 A CN111969891 A CN 111969891A
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- 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
- H02N2/181—Circuits; Control arrangements or methods
-
- 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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
A novel road lighting system utilizing piezoelectric effect comprises a plurality of piezoelectric devices, an energy collecting circuit, an energy storage device and a lighting lamp, wherein the piezoelectric devices are arranged in the direction of a road surface lane, and each piezoelectric device comprises a packaging protection device and a plurality of cymbal type piezoelectric transducers; the cymbal type piezoelectric transducer comprises a piezoelectric ceramic piece, an upper surface metal end cap and a lower surface metal end cap; the energy collecting circuit comprises a full-bridge rectifying circuit, a filter capacitor and a Buck-boost type circuit. The application discloses a novel road lighting system utilizing piezoelectric effect can convert partial mechanical energy generated by traffic axle load vibration into electric energy and collect and utilize the electric energy, can effectively assist illumination along urban highways or tunnels, can effectively solve the problem of inconvenient power supply in remote areas, has obvious economic value and social value, and accords with the targets of energy conservation and emission reduction and vigorous development of green energy in China.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to a novel road lighting system utilizing a piezoelectric effect.
Background
Roads are used as national important infrastructures and have important functions such as personnel and cargo transportation. In the using process of the road, hundreds of thousands to millions of times of vehicle rolling are born each year, the vehicle runs on the road to cause the deformation and vibration of the road surface, and the road surface generates a large amount of mechanical energy. Taking a 6-wheel truck as an example, it passes through the asphalt pavement 1 time, and can generate about 1J of mechanical energy, which is finally converted into the thermal energy of the pavement and released into the air, increasing the risk of rutting damage to the pavement. Illuminating lamps, indicator lamps, monitoring equipment, communication equipment and the like used on roads need to be powered to maintain normal use, but with the development of road construction, more and more mountainous roads are far away, and electric wires are difficult to erect, so that electric equipment on the road surface cannot be normally used or the cost investment is too high. If can utilize suitable road surface collection ability device with by the electric energy of partial mechanical energy conversion that the axle load vibration produced, not only can produce clean energy, reduce the harm that is brought by road surface vibration deformation, can also collect the electric energy that produces and utilize for the traffic subsidiary facility, like the power supply of various lighting apparatus, reduce the consumption of traditional road lighting system to the electric energy.
In the field of piezoelectric energy collection of the existing roads, a cantilever beam type energy collecting device is mostly adopted, although the resonance frequency of the structural form is smaller, the mechanical strength is lower, the structural form is a flexible structure, the structural form is easy to break under larger impact load, and the service life is short. The metal end cap of cymbal formula structure can enlarge vertical stress and convert it to horizontal stress, can bear bigger stress and higher load frequency, even make also possess the advantage of low impedance, big deformation, high bearing capacity under the heavy load environment, still possess better piezoelectricity electricity generation performance under the low frequency load condition. A plurality of cymbals formula piezoelectric transducer adopt electricity parallel connection to connect between, have increased total capacitance, and output electric charge volume grow is favorable to the collection of energy.
Based on the advantages, the invention discloses a novel road lighting system utilizing the piezoelectric effect, which can convert part of mechanical energy generated by traffic axle load vibration into electric energy for collection and utilization, can effectively assist the lighting along urban highways or tunnels, can effectively solve the problem of inconvenient power supply in remote areas, has obvious economic and social values, and meets the aims of energy conservation and emission reduction in China and vigorous development of green energy.
Disclosure of Invention
(1) Technical problem
The invention aims to disclose a novel road lighting system utilizing a piezoelectric effect, which can convert part of mechanical energy generated by traffic axle load vibration into electric energy for collection and utilization, can effectively assist the lighting along urban highways or tunnels, can effectively solve the problem of inconvenient power supply in remote areas, has obvious economic and social values, and meets the aims of energy conservation and emission reduction and vigorous development of green energy in China.
(2) Technical scheme
In order to achieve the purpose, the invention adopts the technical scheme that:
a novel road lighting system utilizing piezoelectric effect is characterized in that: the lighting system comprises a plurality of piezoelectric devices, an energy collecting circuit, an energy storage device and a lighting lamp, wherein the piezoelectric devices are arranged in the direction of a road surface traffic lane, and each piezoelectric device comprises a packaging protection device and a plurality of cymbal type piezoelectric transducers; the cymbal type piezoelectric transducer comprises a piezoelectric ceramic piece, an upper surface metal end cap and a lower surface metal end cap; the energy collecting circuit comprises a full-bridge rectifying circuit, a filter capacitor and a Buck-boost type circuit.
Preferably, the encapsulation protection device is a cuboid structure with a plurality of cylindrical cavities formed therein, and the height of the encapsulation protection device is greater than that of the cymbal type piezoelectric transducer.
Preferably, the middle parts of the upper surface metal end cap and the lower surface metal end cap respectively protrude upwards and downwards, the vertical section of the upper surface metal end cap and the lower surface metal end cap is an isosceles trapezoid, and two sides of the upper surface metal end cap and two sides of the lower surface metal end cap are bonded with the piezoelectric ceramic piece through epoxy conductive adhesives.
Preferably, the full-bridge rectification circuit comprises four germanium diodes.
Preferably, the Buck-boost type circuit comprises a triode, an inductor, a super capacitor, a load and a free-wheeling diode.
Preferably, the energy storage device is used for storing the signal after passing through the energy collecting circuit.
Preferably, the lighting fixture comprises an illuminating lamp, an indicator lamp, a light-emitting plate and a landscape lamp.
(3) Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a novel road lighting system utilizing piezoelectric effect, which can effectively absorb part of mechanical energy generated by traffic axle load vibration and convert the energy into electric energy, has high energy conversion efficiency, and still has good piezoelectric power generation performance under the condition of low-frequency load. The damage caused by the vibration deformation of the road surface is reduced, and the service life of the road is prolonged.
2. The transducer adopts a cymbal type structure, the metal end caps at two ends of the structure can amplify vertical stress and convert the vertical stress into horizontal stress, can bear larger stress and higher load frequency, has the advantages of low impedance, large deformation and high bearing capacity even under a large-load environment, and still has better piezoelectric power generation performance under a low-frequency load condition.
3. The energy collection circuit adopted by the invention consists of a full-bridge rectifying circuit, a filter capacitor and a Buck-boost type circuit, can effectively convert alternating voltage generated by the cymbal type piezoelectric transducer into stable direct voltage, can improve energy conversion efficiency and simultaneously provides direct voltage with adjustable size.
4. Several cymbal type transducers are connected in parallel with the energy collecting circuit, so that the total capacitance is increased, the output charge quantity is increased, and the energy collection is facilitated.
5. The invention provides a novel road lighting system utilizing piezoelectric effect, which can effectively assist the lighting along urban highways or tunnels, can effectively solve the problem of inconvenient power supply in remote areas, reduces the consumption of electric energy by the traditional road lighting system, has obvious economic value and social value, and meets the aims of energy conservation and emission reduction and vigorous development of green energy in China
Description of the drawings:
the drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.
FIG. 1 is a schematic diagram of a cymbal-type piezoelectric transducer of the present invention;
fig. 2 is a schematic diagram of a cymbal type piezoelectric transducer metal end cap structure of the present invention:
FIG. 3 is a schematic diagram of the structure of the packaging protection device of the present invention;
FIG. 4 is a circuit diagram of the energy harvesting of the present invention;
fig. 5 is a schematic view of the road lighting system of the present invention.
In fig. 1 to 5, 1 is a cymbal piezoelectric transducer, 2 is a package protection device, 3 is a metal end cap, 4 is a piezoelectric ceramic piece, 5 is a lead, 6 is a germanium diode, 7 is a filter capacitor, 8 is a triode, 9 is an inductor, 10 is a freewheeling diode, 11 is a super capacitor, 12 is a load, 13 is a full-bridge rectifier circuit, and 14 is a Buck-boost type circuit.
Detailed Description
In order to more clearly understand the technical features, objects and effects of the present invention, the embodiments of the present invention will be described with reference to the accompanying drawings, but the scope of the present invention is not limited to the following specific embodiments.
As shown in fig. 1 to 5, a novel road lighting system using piezoelectric effect comprises a plurality of piezoelectric devices arranged in the direction of a road lane on a road surface, an energy collecting circuit, an energy storage device and a lighting fixture, wherein each piezoelectric device comprises a packaging protection device and a plurality of cymbal type piezoelectric transducers; the cymbal type piezoelectric transducer comprises a piezoelectric ceramic piece, an upper surface metal end cap and a lower surface metal end cap; the energy collecting circuit comprises a full-bridge rectifying circuit, a filter capacitor and a Buck-boost type circuit
The packaging protection device is of a cuboid structure with a plurality of cylindrical cavities arranged inside, and the height of the packaging protection device is larger than that of the cymbal type piezoelectric transducer.
The middle parts of the upper surface metal end caps and the lower surface metal end caps respectively protrude upwards and downwards, the vertical section of each metal end cap is an isosceles trapezoid, and two sides of each metal end cap are bonded with the piezoelectric ceramic piece through epoxy conductive adhesives.
The full-bridge rectification circuit comprises four germanium diodes.
The Buck-boost type circuit comprises a triode, an inductor, a super capacitor, a load and a freewheeling diode.
The energy storage device is used for storing the signals after passing through the energy collecting circuit.
The lighting lamp comprises a lighting lamp, an indicator lamp, a light-emitting plate and a landscape lamp.
In the specific implementation, the method mainly comprises the following steps:
manufacturing a cymbal type piezoelectric transducer 1 and a packaging protection device 2:
(1) manufacturing and processing of the metal end cap 3: the method comprises the steps of placing a brass sheet or a stainless steel sheet with the thickness of 1mm in a stamping die with the diameter of 30mm, the diameter of the bottom surface of an inner cavity of 21mm, the diameter of the top surface of the inner cavity of 5mm and the height of the inner cavity of 3mm, stamping a metal end cap 3 by using the stamping die, removing an oxide layer on a surface to be bonded of the metal end cap 3 by using fine sand paper, uniformly applying force to reduce the deformation of the metal end cap 3 in the polishing process, dipping a proper amount of propionic acid solution into a cotton swab to clean the polished metal end cap 3, and drying the metal end cap for subsequent treatment.
(2) Surface treatment of the piezoelectric ceramic sheet 4: selecting a lead zirconate titanate piezoelectric ceramic plate 4 with the diameter of 30mm and the thickness of 2mm, polishing the middle position and the peripheral edge of the piezoelectric ceramic plate 4 by using fine sand paper, removing an oxide layer on the surface, sucking and removing scraps on the surfaces of the piezoelectric ceramic plate 4 and the metal end cap 3 by using a vacuum cleaner, dipping a cotton swab in a proper propionic acid solution to clean the polished area, and drying the area in the sun to prepare for subsequent treatment.
(3) Bonding of the metal end cap 3 and the piezoceramic sheet 4: and uniformly coating the epoxy conductive adhesive on the polished areas of the piezoelectric ceramic plate 4 and the metal end 3 for bonding. In order to obtain higher bonding strength, the bonding area of the metal end cap 3 and the piezoelectric ceramic piece 4 is ensured to have better parallelism in the bonding process, and the appropriate force is uniform. The epoxy conductive adhesive is not too much, and the epoxy conductive adhesive is prevented from flowing into the inner cavity of the cymbal type piezoelectric transducer 1 to influence the power generation performance of the cymbal type piezoelectric transducer.
(5) And clamping the bonded cymbal type piezoelectric transducer 1 by using a clamp, and standing for 24h for molding.
(6) The package protection device 2 shown in fig. 3 is a cuboid, 4 cylindrical cavities are formed inside the package protection device, the formed cymbal type piezoelectric transducer 1 is placed in the cylindrical cavities, and a front electrode is welded at the edge of the upper surface of the metal end cap 3 by using an electric welding pen. The wires 5 are arranged so as not to cover the metal end caps of the other cymbal piezoelectric transducers, passing through the spaces between the transducers.
(7) The room temperature vulcanized silicone rubber is uniformly coated on the upper surfaces of the cymbal type piezoelectric transducer 1 and the packaging protection device 2, and is fully filled on the upper surfaces and the gaps of the two.
(8) And (5) after the upper surface is cured for 24 hours at room temperature, repeating the steps (6) and (7) to package the lower surface, and curing the lower surface for 24 hours at room temperature.
Secondly, manufacturing an energy collecting circuit:
(1) fig. 4 shows an energy harvesting circuit of the present invention. Four germanium diodes 6 form two series circuits which are connected in parallel on the branch circuit to form a full-bridge rectifying circuit 13.
(2) The solidified packaging protection device 2 is connected in parallel at two ends of the full-bridge rectification circuit 13, and the filter capacitor 7 is connected in parallel at two ends of the full-bridge rectification circuit 13 ab. The output voltage of the cymbal piezoelectric transducer is alternating voltage, and is converted into direct current after passing through the full-bridge rectifying circuit 13, and then stable direct current is obtained through the wave filtering capacitor 7.
(3) The super capacitor 11 is connected with the load 12 in parallel, the anode of the freewheeling diode 10 is connected with the cathode of the super capacitor 11, the cathode is connected with the inductor 9, the emitter of the triode is connected with the inductor 9, and the collector is compatible with the filter capacitor 7, so that a Buck-boost type circuit 14 is formed. The DC obtained after filtering is converted by a Buck-boost type circuit 14 to obtain the DC with adjustable size.
Secondly, paving a road lighting system:
milling a plurality of shallow grooves with the size slightly larger than that of the packaging protection device 2 at the road surface accumulation zone by using a milling machine, cleaning and leveling the bottom, uniformly paving asphalt sand with the thickness of 1cm as a leveling layer at the bottom, and placing the piezoelectric energy collecting device in the shallow grooves after leveling. A cutting slot of a cutting machine is used as a cable slot, and a wire in the piezoelectric energy collecting device is placed in the cable slot. And filling a gap between the piezoelectric energy collecting device and the shallow groove with a joint compound, and filling the cable slot. The piezoelectric energy collecting devices are connected in parallel on the energy collecting circuit in a parallel mode, the energy collecting circuit is directly connected with the energy storage device and used for storing signals passing through the energy collecting circuit, and the light emitting plate is connected with the energy storage device and works by utilizing stored electric energy.
Various other changes and modifications to the above embodiments and concepts will become apparent to those skilled in the art, and all such changes and modifications are intended to be included within the scope of the present invention.
Claims (7)
1. A novel road lighting system utilizing piezoelectric effect is characterized in that: the road lighting system comprises a plurality of piezoelectric devices, an energy collecting circuit, an energy storage device and a lighting lamp, wherein the piezoelectric devices are arranged in the direction of a road surface lane, and each piezoelectric device comprises a packaging protection device and a plurality of cymbal type piezoelectric transducers; the cymbal type piezoelectric transducer comprises a piezoelectric ceramic piece, an upper surface metal end cap and a lower surface metal end cap; the energy collecting circuit comprises a full-bridge rectifying circuit, a filter capacitor and a Buck-boost type circuit.
2. A new road lighting system using piezoelectric effect according to claim 1, characterized in that: the packaging protection device is of a cuboid structure with a plurality of columnar cavities arranged inside, and the height of the packaging protection device is larger than that of the cymbal type piezoelectric transducer.
3. The novel road lighting system using piezoelectric effect as claimed in claim 4, wherein: the middle parts of the upper surface metal end caps and the lower surface metal end caps respectively protrude upwards and downwards, the vertical section of each metal end cap is an isosceles trapezoid, and two sides of each metal end cap are bonded with the piezoelectric ceramic piece through epoxy conductive adhesives.
4. A new road lighting system using piezoelectric effect according to claim 1, characterized in that: the full-bridge rectifying circuit comprises four germanium diodes.
5. A new road lighting system using piezoelectric effect according to claim 1, characterized in that: the Buck-boost type circuit comprises a triode, an inductor, a super capacitor, a load and a freewheeling diode.
6. A new road lighting system using piezoelectric effect according to claim 1, characterized in that: the energy storage device is used for storing the signals after passing through the energy collecting circuit.
7. A new road lighting system using piezoelectric effect according to claim 1, characterized in that: the lighting lamp comprises a lighting lamp, an indicator lamp, a light-emitting plate and a landscape lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010792994.0A CN111969891A (en) | 2020-08-07 | 2020-08-07 | Novel road lighting system utilizing piezoelectric effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010792994.0A CN111969891A (en) | 2020-08-07 | 2020-08-07 | Novel road lighting system utilizing piezoelectric effect |
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| CN111969891A true CN111969891A (en) | 2020-11-20 |
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| CN202010792994.0A Pending CN111969891A (en) | 2020-08-07 | 2020-08-07 | Novel road lighting system utilizing piezoelectric effect |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112575646A (en) * | 2020-12-10 | 2021-03-30 | 清华大学 | Pavement piezoelectric guide indication footpath |
| CN114137351A (en) * | 2021-12-10 | 2022-03-04 | 同济大学 | Pavement piezoelectric energy acquisition system and evaluation method |
-
2020
- 2020-08-07 CN CN202010792994.0A patent/CN111969891A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112575646A (en) * | 2020-12-10 | 2021-03-30 | 清华大学 | Pavement piezoelectric guide indication footpath |
| CN114137351A (en) * | 2021-12-10 | 2022-03-04 | 同济大学 | Pavement piezoelectric energy acquisition system and evaluation method |
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Inventor after: Huang Kaijian Inventor after: Xu Zhe Inventor after: Liu Jiajia Inventor before: Xu Zhe Inventor before: Liu Jiajia Inventor before: Huang Kaijian |