AU2016390238B2 - Test system and method for road surface energy harvesting - Google Patents
Test system and method for road surface energy harvesting Download PDFInfo
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- AU2016390238B2 AU2016390238B2 AU2016390238A AU2016390238A AU2016390238B2 AU 2016390238 B2 AU2016390238 B2 AU 2016390238B2 AU 2016390238 A AU2016390238 A AU 2016390238A AU 2016390238 A AU2016390238 A AU 2016390238A AU 2016390238 B2 AU2016390238 B2 AU 2016390238B2
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- energy harvesting
- road surface
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
- G01M17/021—Tyre supporting devices, e.g. chucks
Abstract
Disclosed are a test system and method for road surface energy harvesting. The system comprises a bed, a power unit fixed to the bed, a wheel simulator, an energy harvesting module (16), a loading unit, and a data acquisition and analysis unit. The power unit provides wheel-rotating power for the wheel simulator to simulate an actual condition of wheel rolling. The energy harvesting module (16) is connected to the loading unit, and the loading unit provides a load for the energy harvesting module (16) to press the energy harvesting module (16) against wheels of the wheel simulator, so as to simulate actual conditions of different loading forces. The data acquisition and analysis unit acquires and analyzes energy harvesting capacity and efficiency data of the energy harvesting module (16). The invention is suitable for simulating operating conditions of road surface energy harvesting for a vehicle running on a road surface, and is used to detect the energy harvesting capacity and efficiency of a road surface energy harvesting system as the load and speed of an automobile change.
Description
The present invention relates to a test system and method for road surface energy harvesting, is applicable to simulation of working conditions of road surface energy harvesting when a vehicle is running on road surface, and is used to detect the energy harvesting capacity and efficiency of a road surface energy harvesting system as the load or speed of an automobile changes.
Technical Background
With the rapid development of national economy, the demand in China for energy sources grows significantly. Coal is the main energy source in China. However, carbon dioxide, sulfur dioxide, and dust emitted from coal combustion cause severe environmental pollution. Therefore, the public attention to environmental protection promotes the demand in China for energy-saving, environmentally-friendly, and green energy sources. Furthermore, in recent years, the quantity of automobiles in China increases rapidly. By the beginning of 2015, the total quantity of motor vehicles in the whole country reaches 264 million, where the quantity of automobiles is 154 million. China already becomes an automobile superpower only second to the United States. Meanwhile, the construction of roads develops vigorously. By the year 2014, the total length of the road networks in China reaches 4,356,200 kilometers, where the total length of expressway reaches 111,900 kilometers. In addition, as city size and city transportation develop rapidly, various vehicles cause an increasingly large amount of vibration and deformation of road surface, and road surface has mechanical energy that is widely usable. If mechanical energy in road surface is converted into electric energy, not only clean electric energy can be produced, but also vibration and deformation in road surface can be reduced, thereby reducing the structural damage to road surface, the costs of structural maintenance, noise pollution, and the like. Therefore, there are desirable application prospects.
Currently, there is a need for an apparatus (a system) that can simulate a working condition of a piezoelectric ceramic sheet being excited by a vehicle as the vehicle runs on road surface, and is used to detect the impacts of different pressures or different acting frequencies on the power generation of the piezoelectric ceramic sheet excited by the pressure of an automobile.
Summary of Invention
The present invention first provides a test system and method for road surface energy harvesting, which is applicable to simulation of working conditions of road surface energy harvesting when a vehicle is running on road surface, and is used to detect the energy harvesting capacity and efficiency of a road surface energy harvesting system as the load or speed of an automobile changes.
A system for testing road surface energy harvesting includes a base frame, a power unit fixed on the base frame, a wheel simulator, energy harvesting modules (16), a loading unit, and a data acquisition and analysis unit, wherein the power unit provides wheel-rotating power to the wheel simulator to simulate an actual working condition of wheel rolling; the energy harvesting modules (16) are connected to the loading unit, and the loading unit provides a load to the energy harvesting modules (16) to press the energy harvesting modules against wheels of the wheel simulator, so as to simulate actual working conditions under different loading forces; and the data acquisition and analysis unit acquires and analyzes energy harvesting capacity and efficiency data of the energy harvesting modules.
In the system for testing road surface energy harvesting, the wheel simulator includes two loading wheel carriers (5), bearing housings (4) used to support the loading wheel carriers (5), wheels (7) used to continuously apply loads on the energy harvesting modules (16), and a main transmission shaft (8), and the two loading wheel carriers (5) are symmetrically mounted on two sides of a support beam (6); and each of the loading wheel carriers (5) is a mounting framework for the wheels (7) that is formed by welding and fixing two disk-shaped loading wheel carrier plates (21) and a loading wheel carrier sleeve (23), the loading wheel carrier plates (21) are designed to have a spoke structure to reduce the weight of the loading wheel carriers (5), a plurality of shaft through holes (22) are evenly opened on the circumference of each of the two loading wheel carrier plates (21), multiple wheels (7) are mounted on each of the loading wheel carriers (5) through the plurality of shaft through holes (22), bolts (20), and nuts (18), a bearing is mounted on a hub of each of the wheels (7), each of the wheels (7) is rotatable about a shaft, and matching shaft sleeves (19) are mounted on two sides of each wheel (7) for the purpose of positioning.
In the system for testing road surface energy harvesting, each of the energy harvesting modules (16) comprises a cuboid-shaped box (26), a top plate (24), a pressure scaling device (29), support posts (32), piezoelectric ceramic sheets (30), and silica gel pads (31), the cuboid-shaped box (26) is a rectangular parallelepiped or cubic box that is coverless on one face, the coverless face is covered by the top plate (24), the top plate (24) is supported by four support posts (32) fixed on four faces of the cuboid-shaped box (26), a cavity is provided at the bottom of the cuboid-shaped box (26), there are sequentially a silica gel pad (31), several piezoelectric ceramic sheets (30), a silica gel pad (31), and the pressure scaling device (29) inside the cavity from bottom to top, an upper portion of the pressure scaling device (29) is a cylindrical body, a clearance fit is formed between the cylindrical body and a round hole opened on the top plate (24), an upper plane of the cylindrical body is level with an upper surface of the top plate (24), the bottom of the pressure scaling device (29) has a quadrilateral prismoid structure, and the bottom of the pressure scaling device (29) is mounted on the piezoelectric ceramic sheet (30) via the upper silica gel pad (31); and two energy harvesting modules (16) are disposed and correspond to the two loading wheel carriers (5), and the two energy harvesting modules (16) are symmetrically placed inside a tray (11).
In the system for testing road surface energy harvesting, the power unit includes a variable-frequency speed-regulating motor (1) mounted on a motor-supporting smooth shaft (9), a two-stage helical gear reducer (2) connected to the variable-frequency speed-regulating motor (1), and a pin coupling (3) connected to an output shaft of the two-stage helical gear reducer (2).
In the system for testing road surface energy harvesting, the loading unit comprises a vertical hydraulic cylinder (13) bolted to a base (10), a tray (11), smooth shafts (12), sliding sleeves (15), and a pressure sensor 28, the smooth shafts (12) are fixed on the base (10) through fixed support bases (14), the vertical hydraulic cylinder (13) is fixed to the bottom of the tray (11) via through holes (27) in the tray and bolts (25), the sliding sleeves (15) are fixed on two sides of the tray (11) and sleeved over the smooth shafts (12), so that the tray is slideable vertically along the smooth shafts (12), the pressure sensor (28) is disposed inside one of the energy harvesting modules (16), and the pressure sensor is fixed inside a recess provided at the top of the pressure scaling device (29), and is used to measure loading pressure.
In the system for testing road surface energy harvesting, a support beam (6) comprises smooth support shafts (33), a cross beam (35) and reinforcing plates (34), each reinforcing plate (34) is fixed at a comer formed by the smooth support shaft (33) and the cross beam (35), a through hole is opened in the middle of the cross beam (35) to fix a bearing housing (37) for a deep groove ball bearing (36), the deep groove ball bearing (36) is mounted inside the bearing housing (37), and the main transmission shaft (8) is nested through the deep groove ball bearing (36).
In the system for testing road surface energy harvesting, the loading wheel carriers (5) are aligned with two energy harvesting modules (16) right below, and the diameter of a round hole opened on the top plate (24) is consistent with a tire width of wheels (7), so that wheel rolling energy can be sufficiently applied on the top of pressure scaling device (29).
A method for testing road surface energy harvesting by using any system for testing road surface energy harvesting according to the foregoing includes the following steps:
1) fixing two energy harvesting modules (16) at two ends of a tray (11) symmetrically, wherein a pressure sensor (28) is disposed in one of the energy harvesting modules (16);
2) aligning tires of any pair of wheels (7) on loading wheel carriers (5) with round holes opened on top plates (24) of the energy harvesting modules (16);
3) pressurizing a vertical hydraulic cylinder (13), to drive the tray (11) to move upwards to enable the energy harvesting modules (16) to come into contact with and be pressed against the tires (7), and stopping pressurization when pressure measured by the pressure sensor (28) reaches a set value;
4) connecting an output lead of a piezoelectric ceramic sheet (30) to an input terminal of an energy harvesting smart card, and setting a numerical option of an output voltage of the energy harvesting smart card to ensure that the output voltage of the energy harvesting smart card is a predetermined value, wherein an output terminal of the energy harvesting smart card is connected to a data acquisition instrument, and the data acquisition instrument is connected to a computer for collecting data; and
5) turning on a variable-frequency speed-regulating motor (1), and changing a rotational speed of the loading wheel carriers (5) by using a variable-frequency drive, thereby a road surface energy harvesting system operates, and the computer analyzes the capacity and efficiency of road surface energy harvesting.
In the method, tires of different specifications and the energy harvesting modules (16) of corresponding specifications are replaced to simulate cases of different vehicle loadings.
In the method, the pressure of the vertical hydraulic cylinder (13) is changed to simulate working conditions of different loads. The rotational speed of the loading wheel carrier (5) is adjusted to simulate working conditions of road surface energy harvesting at different speeds.
To resolve that an existing apparatus cannot simulate a working condition of a piezoelectric ceramic sheet being excited by a vehicle as the vehicle runs on road surface, the present invention proposes the concept of an energy harvesting module to replace a prior manner of directly burying a piezoelectric ceramic sheet under road surface. In the prior manner, the piezoelectric ceramic sheet may be damaged and cannot receive pressure thereon from a vehicle, and as a result, the piezoelectric ceramic sheet cannot work properly or has low working efficiency. The present invention thus provides a system and a method for road surface energy harvesting, is applicable to simulation of a working condition of a piezoelectric ceramic sheet being excited by a vehicle as the vehicle runs on road surface, and is used to detect the impact of different pressures or different acting frequencies on power generation of the piezoelectric ceramic sheet under a pressure excitation effect of an automobile.
Beneficial effects: Compared with the prior art, the present invention has achieved a functional breakthrough to replace a prior manner of directly burying a piezoelectric ceramic sheet under road surface. In the prior manner, the piezoelectric ceramic sheet may be damaged and cannot receive pressure thereon from a vehicle, and as a result, the piezoelectric ceramic sheet cannot work properly or has low working efficiency. The present invention proposes that an energy harvesting module is placed inside a tray as a unit, to enable a force of a vehicle tire to be applied on the piezoelectric ceramic sheets by using a sophisticated structure. In the present invention, a multiple-wheel loading wheel carrier structure is designed, so as to implement that a load is continuously applied by tires on the energy harvesting modules at different speeds, to simulate a working condition of a piezoelectric ceramic sheet being under continuous effects by a vehicle as the vehicle runs on road surface. By using a variable-frequency speed-regulating motor, it may be satisfied that the piezoelectric ceramic sheet may be subject to impact frequency up to 10 Hz, so as to simulate a working condition of the piezoelectric ceramic sheet as a vehicle runs on road surface at a speed of 80 km/h. The present invention is used to disclose the capacity and efficiency of road surface energy harvesting of piezoelectric energy when an energy harvesting module is used as a unit.
Brief Description of Drawings:
FIG. 1 is a front view of a system for testing road surface energy harvesting according to the present invention;
FIG. 2 is a front view of a wheel simulator in the system according to the present invention;
FIG 3 is a left view of the wheel simulator in FIG 2;
FIG 4 is a front view of a loading wheel carrier in the wheel simulator;
FIG 5 is a left view (right) of the loading wheel carrier in FIG 4;
FIG 6 is a top view of a loading unit (energy harvesting modules are already mounted);
FIG 7 is a top view of the energy harvesting modules (a top plate 24 is removed);
FIG 8 is a sectional view of the energy harvesting module along A-A;
FIG 9 is a sectional view of the energy harvesting module along B-B; and
FIG 10 is a front view of a support beam.
1. Variable-frequency speed-regulating motor, 2. Two-stage helical gear reducer, 3. Pin coupling, 4. Bearing housing, 5. Loading wheel carrier, 6. Support beam, 7. Wheel, 8. Main transmission shaft, 9. Motor-supporting smooth shaft, 10. Base, 11. Tray, 12. Smooth shaft, 13. Vertical hydraulic cylinder, 14. Fixed support base, 15. Sliding sleeve, 16. Energy harvesting module, 17. Bearing-housing-supporting smooth shaft, 18. Nut, 19. Shaft sleeve, 20. Bolt, 21. Loading wheel carrier plate, 22. Shaft through hole, 23. Loading wheel carrier sleeve, 24. Top plate, 25. Bolt, 26. Cuboid-shaped box, 27. Through hole, 28. Pressure sensor, 29. Pressure scaling device, 30. Piezoelectric ceramic sheet, 31. Silica gel pad, 32. Support post, 33. Smooth shaft, 34. Reinforcing plate, 35. Cross beam, 36. Deep groove ball bearing, and 37. Bearing housing.
Description of Embodiments
The present invention is described in detail below with reference to specific embodiments.
Referring to FIG. 1, a system for testing road surface energy harvesting includes: a base frame, a power unit fixed on the base frame, a wheel simulator, energy harvesting modules 16, a loading unit, and a data acquisition and analysis unit, wherein the power unit provides wheel-rotating power to the wheel simulator to simulate an actual working condition of wheel rolling; the energy harvesting modules 16 are connected to the loading unit, and the loading unit provides a load to the energy harvesting modules 16 to press the energy harvesting modules against wheels of the wheel simulator, so as to simulate actual working conditions under different loading forces.
The base frame includes a base 10, a motor-supporting smooth shaft 9 fixed on the base 10, a bearing-housing-supporting smooth shaft 17 fixed on the base 10, and a support beam 6 fixed on the base 10. The bearing-housing-supporting smooth shaft 17 is used to support a bearing housing 4.
The power unit includes a variable-frequency speed-regulating motor 1 mounted on a motor-supporting smooth shaft 9, a two-stage helical gear reducer 2 connected to the variable-frequency speed-regulating motor 1, and a pin coupling 3 connected to an output shaft of the two-stage helical gear reducer 2.
Referring to FIG. 2 to FIG. 5, the wheel simulator includes two loading wheel carriers 5, bearing housings 4 used to support the loading wheel carriers 5, wheels 7 used to continuously apply loads on the energy harvesting modules 16, and a main transmission shaft
8. The two loading wheel carriers 5 are symmetrically mounted on two sides of a support beam 6. Each of the loading wheel carriers 5 is a mounting framework for the wheels 7 that is formed by welding and fixing two disk-shaped loading wheel carrier plates 21 and a loading wheel carrier sleeve 23, the loading wheel carrier plates 21 are designed to have a spoke structure to reduce the weight of the loading wheel carriers 5, six shaft through holes 22 are evenly opened on the circumference of each of the two loading wheel carrier plates 21, six wheels 7 are mounted on each of the loading wheel carriers 5 by using the six shaft through holes 22, bolts 20, and nuts 18, a bearing is mounted on a hub of each of the wheels 7, each of the wheels 7 is rotatable about a shaft, and matching shaft sleeves 19 are mounted on two sides of each wheel 7 for the purpose of positioning. In such a connection manner, wheels 7 of different sizes may be replaced. By means of the design of this structure, continuous loading of the wheel simulator on the energy harvesting modules 16 at different speeds is implemented.
Referring to FIG. 6 to FIG. 9, each of the energy harvesting modules 16 includes a cuboid-shaped box 26, a top plate 24, a pressure scaling device 29, support posts 32, piezoelectric ceramic sheets 30, and silica gel pads 31. The cuboid-shaped box 26 is a rectangular parallelepiped or cubic metal box that is coverless on one face. The coverless face is covered by the top plate 24. The top plate 24 is supported by four support posts 32 fixed on four faces of the cuboid-shaped box 26. A cubic cavity with a side length of 95 mm, a height of 20 mm, and a wall thickness of 5 mm is provided at the bottom of the cuboid-shaped box 26. There are sequentially a silica gel pad 31, several piezoelectric ceramic sheets 30, a silica gel pad 31, and the bottom of the pressure scaling device 29 inside the cavity from bottom to top. An upper portion of the pressure scaling device 29 is a cylindrical body. A clearance fit is formed between the cylindrical body and a round hole opened on the top plate 24. An upper plane of the cylindrical body is level with an upper surface of the top plate 24. The bottom of the pressure scaling device 29 has a quadrilateral prismoid structure. The bottom of the pressure scaling device 29 is mounted on the piezoelectric ceramic sheet 30 via the upper silica gel pad 31. Corresponding to the two loading wheel carriers 5, two energy harvesting modules 16 are disposed and symmetrically placed inside a tray 11. Four through holes are opened at four corners of the bottom of each energy harvesting module 16, and are not shown in the figures. Through holes of the same specifications are disposed at corresponding positions at the bottom of the tray 11. The through holes are connected and fixed through bolts.
The loading unit includes a vertical hydraulic cylinder 13 bolted to a base 10, a tray 11, smooth shafts 12, sliding sleeves 15, and a pressure sensor 28. The smooth shafts 12 are fixed on the base 10 through fixed support bases 14. The vertical hydraulic cylinder 13 is fixed to the bottom of the tray 11 by using through holes 27 in the tray and bolts 25. The sliding sleeves 15 are fixed on two sides of the tray 11. The sliding sleeves 15 are sleeved over the smooth shafts 12, so that the tray is slideable vertically along the smooth shafts 12. As may be seen from FIG. 7 and FIG. 9, the pressure sensor 28 is further disposed in the energy harvesting module 16 on the right side in FIG. 7. The pressure sensor is fixed inside a recess opened at the top of a pressure scaling device 29, and is used to measure loading pressure. The pressure sensor 28 may be omitted from the energy harvesting module 16 on the other side.
The data acquisition and analysis unit includes an energy harvesting smart card, a data acquisition instrument, and a computer.
Referring to FIG. 10, a support beam 6 includes smooth support shafts 33, a cross beam 35, and reinforcing plates 34. Two vertical smooth support shafts 33 made of channel steel are welded to the cross beam 35 made of channel steel. The reinforcing plates 34 are welded at corners formed by the smooth support shafts 33 and the cross beam 35, thereby increasing the stability of the support beam 6. A through hole is opened in the middle of the cross beam 35 and is used to fix a bearing housing 37 for a deep groove ball bearing 36. The deep groove ball bearing 36 is mounted inside the bearing housing 37. The main transmission shaft 8 is nested through the deep groove ball bearing 36, and may perform transmission freely.
An output terminal of the variable-frequency speed-regulating motor 1 is directly connected to the two-stage helical gear reducer 2. An output shaft of the two-stage helical gear reducer 2 is connected to the main transmission shaft 8 through the pin coupling 3. Output power of the variable-frequency speed-regulating motor 1 is transferred to the loading wheel carriers 5. Deep groove ball bearing housings 4 are disposed at symmetrical positions on the main transmission shaft 8 and are used to support the loading wheel carriers 5.
The loading wheel carriers 5 are aligned with two energy harvesting modules 16 right below. The diameter of a round hole opened on the top plate 24 of each of the energy harvesting modules 16 is consistent with a tire width of a wheel 7, so that wheel energy can be sufficiently applied on the top of a pressure scaling device 29.
Two silica gel pads 31 are provided in the energy harvesting modules 16. One silica gel pad 31 is first placed within a positioning boundary at the bottom of the cuboid-shaped box 26, and is laid flat. The several piezoelectric ceramic sheets 30 are sequentially placed on the silica gel pad 31 and are placed flat. After the piezoelectric ceramic sheets 30 are placed, the other silica gel pad 31 is then laid on the piezoelectric ceramic sheets 30. After the silica gel pads 31 and the piezoelectric ceramic sheets 30 are neatly arranged, the pressure scaling device 29 is placed on the second silica gel pad 31 and a clearance fit is formed between the pressure scaling device 29 and the positioning boundary at the bottom of the cuboid-shaped box 26. Contact between the top of the pressure scaling device 29 and the top plate 24 on the cuboid-shaped box 26 should be avoided and a particular gap needs to be provided. A seal ring is used at the gap for sealing and waterproofing.
The present invention further provides a method for testing road surface energy harvesting by using the system for testing road surface energy harvesting according to the foregoing, including:
1) fixing two energy harvesting modules 16 at two ends of a tray 11 symmetrically, wherein a pressure sensor 28 is disposed in one of the energy harvesting modules 16;
2) aligning tires of any pair of wheels 7 on loading wheel carriers 5 with round holes opened on top plates 24 of the energy harvesting modules 16;
3) pressurizing a vertical hydraulic cylinder 13, to drive the tray 11 to move upwards to enable the energy harvesting modules 16 to come into contact with and be pressed against the
2016390238 15 Jan 2019 tires 7, and stopping pressurization when pressure measured by the pressure sensor 28 reaches a set pressure;
4) connecting an output lead of a piezoelectric ceramic sheet 30 to an input terminal of an energy harvesting smart card, and setting a numerical option of an output voltage of the energy harvesting smart card to ensure that the output voltage of the energy harvesting smart card is a predetermined value, wherein an output terminal of the energy harvesting smart card is connected to a data acquisition instrument, and the data acquisition instrument is connected to a computer for collecting data; and
5) turning on a variable-frequency speed-regulating motor 1, and changing a rotational speed of the loading wheel carriers 5 by using a variable-frequency drive, thereby a road surface energy harvesting system operates, and the computer analyzes the capacity and efficiency of road surface energy harvesting.
Tires of different specifications and the energy harvesting modules 16 of corresponding specifications may be replaced to simulate cases of different vehicle loadings. The pressure of the vertical hydraulic cylinder 13 is changed to simulate working conditions under different loads.
It should be understood that a person of ordinary skill in the art may make improvements or variations according to the foregoing description. All these improvements or variations should fall within the protection scope as defined by the appended claims of the present invention.
It will be understood that the term “comprise” and any of its derivatives (eg comprises, comprising) as used in this specification is to be taken to be inclusive of features to which it refers, and is not meant to exclude the presence of any additional features unless otherwise stated or implied.
The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement or any form of suggestion that such prior art forms part of the common general knowledge.
Claims (5)
1. A system for testing road surface energy harvesting, comprising: a base frame, a power unit fixed on the base frame, a wheel simulator, energy harvesting modules (16), a loading unit, and a data acquisition and analysis unit, wherein the power unit provides wheel-rotating power to the wheel simulator to simulate an actual working condition of wheel rolling; the energy harvesting modules (16) are connected to the loading unit, and the loading unit provides a load to the energy harvesting modules (16) to press the energy harvesting modules against wheels of the wheel simulator, so as to simulate actual working conditions under different loading forces; and the data acquisition and analysis unit acquires and analyzes energy harvesting capacity and efficiency data of the energy harvesting modules wherein the wheel simulator comprises two loading wheel carriers (5), bearing housings (4) used to support the loading wheel carriers (5), wheels (7) used to continuously apply loads on the energy harvesting modules (16), and a main transmission shaft (8), and the two loading wheel carriers (5) are symmetrically mounted on two sides of a support beam (6); and each of the loading wheel carriers (5) is a mounting framework for the wheels (7) that is formed by welding and fixing two disk-shaped loading wheel carrier plates (21) and a loading wheel carrier sleeve (23), the loading wheel carrier plates (21) are designed to have a spoke structure to reduce the weight of the loading wheel carriers (5), a plurality of shaft through holes (22) are evenly opened on the circumference of each of the two loading wheel carrier plates (21), multiple wheels (7) are mounted on each of the loading wheel carriers (5) by using the plurality of shaft through holes (22), bolts (20), and nuts (18), a bearing is mounted on a hub of each wheel (7), each of the wheels (7) is rotatable about a shaft, and two matching shaft sleeves (19) are mounted on both sides of each wheel (7) to position the wheel (7).
2. The system for testing road surface energy harvesting according to claim 1, wherein each of the energy harvesting modules (16) comprises a cuboid-shaped box (26), a top plate (24), a pressure scaling device (29), support posts (32), piezoelectric ceramic sheets (30), and silica gel pads (31), the cuboid-shaped box (26) is a rectangular parallelepiped or cubic box that is coverless on one face, the coverless face is covered by the top plate (24), the top plate (24) is supported by four support posts (32) fixed on four faces of the cuboid-shaped box (26), a cavity is provided at the bottom of the cuboid-shaped box (26), there are sequentially a silica gel pad (31), several piezoelectric ceramic sheets (30), a silica gel pad (31), and the pressure scaling device (29) inside the cavity from bottom to top, an upper portion of the pressure scaling device (29) is a cylindrical body, a clearance fit is formed between the cylindrical body and a round hole opened on the top plate (24), an upper plane of the cylindrical body is
2016390238 15 Jan 2019 level with an upper surface of the top plate (24), the bottom of the pressure scaling device (29) has a quadrilateral prismoid structure, and the bottom of the pressure scaling device (29) is mounted on the piezoelectric ceramic sheet (30) via the upper silica gel pad (31); and two energy harvesting modules (16) are disposed and correspond to the two loading wheel carriers (5), and the two energy harvesting modules (16) are symmetrically placed inside a tray (11).
3. The system for testing road surface energy harvesting according to claim 1, wherein the power unit comprises a variable-frequency speed-regulating motor (1) mounted on a motor-supporting smooth shaft (9), a two-stage helical gear reducer (2) connected to the variable-frequency speed-regulating motor (1), and a pin coupling (3) connected to an output shaft of the two-stage helical gear reducer (2).
4. The system for testing road surface energy harvesting according to claim 1, wherein the loading unit comprises a vertical hydraulic cylinder (13) bolted to a base (10), a tray (11), smooth shafts (12), sliding sleeves (15), and a pressure sensor (28), the smooth shafts (12) are fixed on the base (10) through fixed support bases (14), the vertical hydraulic cylinder (13) is fixed to the bottom of the tray (11) via through holes (27) in the tray and bolts (25), the sliding sleeves (15) are fixed on two sides of the tray (11) and sleeved over the smooth shafts (12), so that the tray is slideable vertically along the smooth shafts (12), the pressure sensor (28) is disposed inside one of the energy harvesting modules (16), and the pressure sensor is fixed inside a recess provided at the top of the pressure scaling device (29), and is used to measure loading pressure.
5. The system for testing road surface energy harvesting according to claim 1, wherein a support beam (6) comprises smooth support shafts (33), a cross beam (35) and reinforcing plates (34), each reinforcing plate (34) is fixed at a comer formed by the smooth support shaft (33) and the cross beam (35), a through hole is opened in the middle of the cross beam (35) to fix a bearing housing (37) for a deep groove ball bearing (36), the deep groove ball bearing (36) is mounted inside the bearing housing (37), and the main transmission shaft (8) is nested through the deep groove ball bearing (36).
6. The system for testing road surface energy harvesting according to claim 1, wherein the loading wheel carriers (5) are aligned with two energy harvesting modules (16) right below, and the diameter of a round hole opened on the top plate (24) is consistent with the tire width of wheels (7), so that wheel rolling energy can be sufficiently applied on the top of
2016390238 15 Jan 2019 pressure scaling device (29).
7. A method for testing road surface energy harvesting by using the system for testing road surface energy harvesting according to any one of claims 1 to 6, comprising the following steps:
1) fixing two energy harvesting modules (16) at two ends of a tray (11) symmetrically, wherein a pressure sensor (28) is disposed in one of the energy harvesting modules (16);
2) aligning tires of any pair of wheels (7) on loading wheel carriers (5) with round holes opened on top plates (24) of the energy harvesting modules (16);
3) pressurizing a vertical hydraulic cylinder (13), to drive the tray (11) to move upwards to enable the energy harvesting modules (16) to come into contact with and be pressed against the tires (7), and stopping pressurization when pressure measured by the pressure sensor (28) reaches a set pressure;
4) connecting an output lead of a piezoelectric ceramic sheet (30) to an input terminal of an energy harvesting smart card, and setting a numerical option of an output voltage of the energy harvesting smart card to ensure that the output voltage of the energy harvesting smart card is a predetermined value, wherein an output terminal of the energy harvesting smart card is connected to a data acquisition instrument, and the data acquisition instrument is connected to a computer for collecting data; and
5) turning on a variable-frequency speed-regulating motor (1), and changing a rotational speed of the loading wheel carriers (5) by using a variable-frequency drive, thereby a road surface energy harvesting system operates, and the computer analyzes the capacity and efficiency of road surface energy harvesting.
8. The method according to claim 7, wherein tires of different specifications and the energy harvesting modules (16) of corresponding specifications are replaced to simulate cases of different vehicle loadings.
9. The method according to claim 7, wherein the pressure of the vertical hydraulic cylinder (13) is changed to simulate working conditions of different loads; and a rotational speed of the loading wheel carrier (5) is adjusted to simulate working conditions of road surface energy harvesting at different speeds.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610056420.0A CN105699101B (en) | 2016-01-27 | 2016-01-27 | A kind of road surface energy acquisition test system and method |
| CN2016100564200 | 2016-01-27 | ||
| PCT/CN2016/108880 WO2017128867A1 (en) | 2016-01-27 | 2016-12-07 | Test system and method for road surface energy harvesting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2016390238A1 AU2016390238A1 (en) | 2018-04-19 |
| AU2016390238B2 true AU2016390238B2 (en) | 2019-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| AU2016390238A Ceased AU2016390238B2 (en) | 2016-01-27 | 2016-12-07 | Test system and method for road surface energy harvesting |
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| Country | Link |
|---|---|
| CN (1) | CN105699101B (en) |
| AU (1) | AU2016390238B2 (en) |
| CA (1) | CA3000645C (en) |
| WO (1) | WO2017128867A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105699101B (en) * | 2016-01-27 | 2018-04-03 | 中国矿业大学 | A kind of road surface energy acquisition test system and method |
| DE102016224142A1 (en) * | 2016-12-05 | 2018-06-07 | Zf Friedrichshafen Ag | Modular buildable powertrain test bench for electric vehicle drives |
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| CN101620050A (en) * | 2009-08-10 | 2010-01-06 | 山东交通学院 | Gasbag type road surface accelerating and loading experimental device |
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| CN104539192B (en) * | 2014-12-22 | 2016-10-12 | 清华大学 | A kind of piezoelectric type road vibration energy collecting system |
| CN104980061A (en) * | 2015-06-28 | 2015-10-14 | 奇瑞商用车（安徽）有限公司 | Recovery method of automobile vibration energy |
| CN105699101B (en) * | 2016-01-27 | 2018-04-03 | 中国矿业大学 | A kind of road surface energy acquisition test system and method |
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2016
- 2016-01-27 CN CN201610056420.0A patent/CN105699101B/en not_active Expired - Fee Related
- 2016-12-07 WO PCT/CN2016/108880 patent/WO2017128867A1/en active Application Filing
- 2016-12-07 CA CA3000645A patent/CA3000645C/en active Active
- 2016-12-07 AU AU2016390238A patent/AU2016390238B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620050A (en) * | 2009-08-10 | 2010-01-06 | 山东交通学院 | Gasbag type road surface accelerating and loading experimental device |
| CN203639408U (en) * | 2013-12-30 | 2014-06-11 | 西安华江环保科技股份有限公司 | Novel four-station side-draught smoke guide car |
| CN204572368U (en) * | 2015-04-28 | 2015-08-19 | 陈玉钰 | A kind of pavement generating set |
Also Published As
| Publication number | Publication date |
|---|---|
| CA3000645C (en) | 2020-12-22 |
| CN105699101A (en) | 2016-06-22 |
| AU2016390238A1 (en) | 2018-04-19 |
| CN105699101B (en) | 2018-04-03 |
| CA3000645A1 (en) | 2017-08-03 |
| WO2017128867A1 (en) | 2017-08-03 |
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