Power generation device utilizing bridge vibration and bridge

Abstract

The invention relates to the technical field of bridge accessory structures, and provides a power generation device using bridge vibration and a bridge, the power generation device comprises a first piezoelectric part and a second piezoelectric part, the first piezoelectric part and the second piezoelectric part are both located in a cavity of a bridge body, and the first piezoelectric part and the second piezoelectric part are arranged in the cavity. One side of the first piezoelectric component is connected with one side of the second piezoelectric component, the other side of the first piezoelectric component is connected to the side wall through a first elastic component, and the other side of the second piezoelectric component is connected to the side wall through a second elastic component. The deformation directions of the first elastic component and the second elastic component are parallel to each other, the second piezoelectric component is compressed when the first piezoelectric component is stretched, and the second piezoelectric component is stretched when the first piezoelectric component is compressed. The device can generate power through vibration generated by the bridge, the power generation efficiency can be improved, and the continuity and stability of power generation are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of bridge accessory structures, in particular to a power generation device and a bridge utilizing bridge vibration. Background Art

[0002] At present, my country's rapid development in highway construction is obvious to all. However, due to multiple factors such as the economy, traffic conditions and the limitations of the times, there are a large number of non-urban bridges in my country that are not equipped with lighting facilities. However, there are also many cases of accidents caused by poor lighting at night, and bridges are often used to cross water systems, poor geology and other application scenarios. They are located at a higher spatial position, and the loss of life and property caused by bridge traffic accidents is large. In view of this, installing lighting facilities on bridges will undoubtedly help reduce traffic accidents and increase traffic safety. In addition, after decades of service, with the increase in traffic volume, frequent heavy loads, and harsh service environment, bridges are at risk of structural failure, which affects the service life of bridges. In order to ensure the safety and reliability of bridges, it is very necessary to install sensors for bridge health monitoring.

[0003] However, whether it is installing lighting facilities or monitoring sensors and other electrical equipment on bridges, they all need power supply. The power supply problem for urban bridges is relatively easy to solve, but most highway bridges are far away from cities. If they are connected to the national power grid, the cost of infrastructure construction, manpower and technology is high. If chemical batteries are used for power supply, the maintenance cost of battery charging and replacement is high. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that bridge electrical equipment lacks a power supply solution that takes into account both low construction cost and low maintenance cost, and to provide a power generation device and a bridge that utilizes bridge vibration.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A power generation device using bridge vibration includes a first piezoelectric component and a second piezoelectric component, wherein the first piezoelectric component and the second piezoelectric component are both located in a cavity of a beam body, one side of the first piezoelectric component and one side of the second piezoelectric component are connected to each other, the other side of the first piezoelectric component is connected to a side wall via a first elastic component, and the other side of the second piezoelectric component is connected to the side wall via a second elastic component, the deformation directions of the first elastic component and the second elastic component are parallel to each other, the second piezoelectric component is compressed when the first piezoelectric component is stretched, and the second piezoelectric component is stretched when the first piezoelectric component is compressed.

[0006] The cavity can be, for example, inside a box chamber of a box girder or inside a hollow section of a plate girder. Since the size of the piezoelectric device can be flexibly designed, a size that matches the size of the cavity can be selected for ease of installation at the above-mentioned location. The power generation device rationally utilizes the space of the bridge structure for arrangement without causing damage to the beam structure, pavement structure, etc., and will not be affected by environmental rainwater, etc.

[0007] In the initial state, the power generation device is in a balanced state.

[0008] The axial direction of the first elastic component, that is, the second elastic component, can be determined according to the main vibration generation mode of the corresponding layout position of the bridge. For example, if there are more vehicle vibrations, a vertical layout can be selected. If the energy generated by wind loads is more, a transverse layout can be selected, and it can also be considered based on the actual layout space.

[0009] The first elastic member and the second elastic member may be, for example, a spring, a bellows / plate, etc.

[0010] The power generation device can be directly connected to the equipment that needs power supply or the power storage device.

[0011] The power generation device using bridge vibration described in the present invention adopts two piezoelectric components and two elastic components to form a symmetrical dual elastic vibration system, converts the energy generated by the bridge vibration into elastic potential energy for storage, and then the elastic potential energy is gradually converted into work done by the force transmission plate on the piezoelectric device, thereby generating electricity, and forms a connection with the bridge through the corresponding elastic component. The arrangement position in the cavity can have a larger amplitude than other positions, thereby improving the power generation efficiency. The connected first elastic component and the second elastic component gradually reduce the amplitude of the piezoelectric component, thereby extending the vibration duration, making the generated charge more stable and lasting, and enhancing the stability and balance of the power generation device. Through the combination of two independent first piezoelectric components and second piezoelectric components, the device always maintains one under pressure and the other under tension in the non-equilibrium position, and the piezoelectric component is deformed by force to achieve power generation. The direction of the generated electrical signal is clear, which is convenient for the collection of charge, effectively ensuring the continuity of power generation, having a good promotion prospect, and well balancing the construction cost and maintenance cost.

[0012] If the two elastic components are arranged up and down, it is also beneficial to evenly distribute the gravity load of the piezoelectric component and reduce the tilt and instability caused by uneven center of gravity.

[0013] Preferably, the first elastic component and the second elastic component each include a plurality of springs, and the springs corresponding to the first elastic component and the second elastic component are coaxially arranged.

[0014] The two elastic components include a number of springs. If any one of the springs fails due to fatigue damage, the double spring system can automatically readjust to a new force balance point, thereby ensuring that the system continues to operate normally and improving fault tolerance and reliability.

[0015] Further preferably, the first piezoelectric component and the second piezoelectric component are connected via a partition plate.

[0016] Further preferably, the first piezoelectric component and the first elastic component are connected via a force transmission plate, and the second piezoelectric component and the second elastic component are connected via a force transmission plate.

[0017] It can provide better reaction force to improve power generation efficiency.

[0018] Further preferably, if the first elastic component and the second elastic component are both arranged in the horizontal direction, the partition plate is connected to a support member.

[0019] So that the elastic component can be deformed better along the axial direction.

[0020] Preferably, a rectification and voltage stabilization system is also included.

[0021] Preferably, an energy storage system is also included.

[0022] Further preferably, the first piezoelectric component and the second piezoelectric component each include a plurality of piezoelectric ceramics, an insulating component is provided between two adjacent piezoelectric ceramics, the piezoelectric ceramics are connected to a contact plate, and the contact plate is connected to a common line.

[0023] Further preferably, the first piezoelectric component and the second piezoelectric component are both located at the mid-span section of the bridge.

[0024] Compared with the vibration amplitude at the beam end support and in the road surface, the power generation efficiency is higher.

[0025] A bridge comprises any one of the above-mentioned power generation devices utilizing bridge vibration.

[0026] The bridge described in the present invention can effectively recycle the vibration energy of the bridge, is widely applicable to various types of hollow section bridges, can effectively recycle energy, and is energy-saving and environmentally friendly.

[0027] Preferably, there are at least two power generation devices, wherein the deformation directions of the first elastic components of the two power generation devices are perpendicular to each other.

[0028] It can make fuller use of various forms of vibration energy of the bridge and improve power generation efficiency.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The power generation device using bridge vibration described in the present invention has a larger amplitude and can improve power generation efficiency. The connected first elastic component and the second elastic component gradually reduce the amplitude of the piezoelectric component, prolong the vibration duration, and make the generated charge more stable and lasting. Through the combination of two independent first piezoelectric components and the second piezoelectric component, the device always maintains one compressed (or tensile) and the other tensile (or compressed) in the non-equilibrium position. The piezoelectric component is deformed by force to achieve power generation. The generated electrical signal has a clear direction, which is convenient for collecting charges and effectively ensures the continuity of power generation. It can also reasonably utilize the bridge structure space for layout, without causing damage to the beam structure, road surface structure, etc., and will not be affected by environmental rainwater, etc. It has a good promotion prospect and well balances construction cost and maintenance cost.

[0030] 2. The bridge described in the present invention can effectively recycle the vibration energy of the bridge, is widely applicable to various types of hollow section bridges, can effectively recycle energy, and is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic cross-sectional structure diagram of a power generation device utilizing bridge vibration according to Example 1; Figure 2 yes Figure 1 A schematic side view of the interior of the cavity in FIG. Figure 3 is a schematic structural diagram of the first piezoelectric component of Example 1; Figure 4 is a schematic cross-sectional structure diagram of another power generation device utilizing bridge vibration according to Example 1; Figure 5 It is a schematic diagram of the cross-sectional structure of a power generation device utilizing bridge vibration according to Example 2.

[0032] Figure numerals: 0 - cavity; 11 - first piezoelectric component; 12 - second piezoelectric component; 21 - first elastic component; 22 - second elastic component; 31 - partition plate; 32 - force transmission plate; 41 - piezoelectric ceramic; 42 - insulating component; 43 - contact plate; 44 - common line; 5 - support member. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] In order to make the purpose, technical scheme and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above-mentioned subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0035] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0037] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0038] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0039] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0040] Example 1 like Figure 1-Figure 3 As shown, a power generation device using bridge vibration adopted in this embodiment includes a first piezoelectric component 11 and a second piezoelectric component 12, wherein the first piezoelectric component 11 and the second piezoelectric component 12 are both located in a cavity 0 of the beam body, one side of the first piezoelectric component 11 and one side of the second piezoelectric component 12 are connected to each other, the other side of the first piezoelectric component 11 is connected to the side wall through a first elastic component 21, and the other side of the second piezoelectric component 12 is connected to the side wall through a second elastic component 22, the deformation directions of the first elastic component 21 and the second elastic component 22 are parallel to each other, the second piezoelectric component 12 is compressed when the first piezoelectric component 11 is stretched, and the second piezoelectric component 12 is stretched when the first piezoelectric component 11 is compressed.

[0041] For example, Figure 1 The hollow cavity 0 is the box chamber of the box girder, the first piezoelectric component 11 and the second piezoelectric component 12 are located at the mid-span section of the bridge, the first elastic component 21 and the second elastic component 22 both use a plurality of springs, the deformation direction of the springs is arranged vertically, the first elastic component 21 is connected to the top plate of the box girder through the corresponding embedded plate, the second elastic component 22 is connected to the bottom plate of the box girder through the corresponding embedded plate, the first piezoelectric component 11 and the second piezoelectric component 12 are connected through the partition plate 31, the first piezoelectric component 11 and the first elastic component 21 are connected through the force transmission plate 32, the second piezoelectric component 12 and the second elastic component 22 are connected through the force transmission plate 32, the partition plate 31 and the force transmission plate 32 can be steel plates, the springs and the embedded plates and steel plates can be welded, bolted, etc., the first piezoelectric component 11 and the second piezoelectric component 12 can be bonded to the partition plate 31.

[0042] In some embodiments, the first piezoelectric component 11 and the second piezoelectric component 12 each include a plurality of piezoelectric ceramics 41, an insulating component 42, such as insulating glass, is provided between two adjacent piezoelectric ceramics 41, and the piezoelectric ceramics 41 are connected by bonding, the side of the piezoelectric ceramics 41 is connected to a contact plate 43, and the contact plate 43 is connected to a common line 44, forming a multi-layer stacked piezoelectric stack, such as Figure 3 The structural diagram of the second piezoelectric component 12 can also be referred to Figure 3 .

[0043] In some embodiments, a rectifier and voltage regulator system and an energy storage system are also included. The energy storage system can be various batteries, super capacitors, etc. When the box girder bridge vibrates due to the passing of vehicles or wind load, the piezoelectric component is driven to damp vibration, but the generated charge flow may be irregular and unstable, and needs to be converted into stable direct current by the rectifier and voltage regulator system to enter the energy storage. The energy storage system stores the electric energy in the battery to power lighting facilities or monitoring sensors, etc. The entire system completes the recovery and utilization of the vibration energy of the box girder bridge.

[0044] In some embodiments, the cavity 0 may also be located in a hollow slab beam, such as Figure 4 shown.

[0045] The power generation device using bridge vibration described in the present invention is connected to the bridge through corresponding elastic components. The vibration generated by the bridge can enable the piezoelectric component to generate electricity. The arrangement position in the cavity 0 can have a larger amplitude than other positions, thereby improving the power generation efficiency. The connected first elastic component 21 and the second elastic component 22 can gradually reduce the amplitude of the piezoelectric component, extend the vibration duration, and make the generated charge more stable and lasting. Through the combination of two independent first piezoelectric components 11 and second piezoelectric components 12, the device always maintains one compressed (or tensile) and the other tensile (or compressed) in an unbalanced position. The piezoelectric component is deformed by force to achieve power generation. The generated electrical signal has a clear direction, which is convenient for collecting charges and effectively ensures the continuity of power generation. It has a good promotion prospect and well balances construction cost and maintenance cost.

[0046] Example 2 A power generation device utilizing bridge vibration, the structure of which is substantially the same as that of Example 1, except that the deformation direction of the spring is arranged in the horizontal direction, such as along the transverse direction of the bridge, see Figure 5 The partition plate 31 is connected with a support member 5 to avoid affecting the deformation of the elastic member. The support member 5 can be an additional component or can utilize the bottom plate of the cavity 0. The piezoelectric member and the support member 5 can be in contact with each other in a low-friction manner, such as by pasting a polytetrafluoroethylene surface layer or applying lubricating oil.

[0047] The support member 5 can be a guide rod along the axial direction of the spring, or a slide seat. Figure 5 As shown, the partition plate 31 is connected to the slide seat, and the slide seat is rollingly connected to the bottom plate.

[0048] Example 3 A bridge according to the present invention includes a power generation device utilizing bridge vibration as in Example 1 or 2, which can effectively recycle the vibration energy of the bridge, is widely applicable to various types of hollow section bridges, can effectively recycle energy, and is energy-saving and environmentally friendly.

[0049] In some embodiments, there are at least two power generation devices, wherein the deformation directions of the first elastic components 21 of the two power generation devices are perpendicular to each other. If there are two power generation devices, one is in the form of embodiment 1 and the other is in the form of embodiment 2, it is convenient to obtain vibration energy in two directions. Three or more power generation devices may also be provided, wherein at least one is in the form of embodiment 1 and at least one is in the form of embodiment 2, corresponding to two different axial deformation directions respectively.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power generation device utilizing bridge vibration, characterized in that: The invention comprises a first piezoelectric component (11) and a second piezoelectric component (12), wherein the first piezoelectric component (11) and the second piezoelectric component (12) are both located in a cavity (0) of a beam body, one side of the first piezoelectric component (11) and one side of the second piezoelectric component (12) are connected to each other, the other side of the first piezoelectric component (11) is connected to a side wall via a first elastic component (21), and the other side of the second piezoelectric component (12) is connected to the side wall via a second elastic component (22), the deformation directions of the first elastic component (21) and the second elastic component (22) are parallel to each other, the second piezoelectric component (12) is compressed when the first piezoelectric component (11) is stretched, and the second piezoelectric component (12) is stretched when the first piezoelectric component (11) is compressed.

2. The power generation device using bridge vibration according to claim 1, characterized in that: The first elastic component (21) and the second elastic component (22) both comprise a plurality of springs, and the springs corresponding to the first elastic component (21) and the second elastic component (22) are coaxially arranged.

3. The power generation device using bridge vibration according to claim 2, characterized in that: The first piezoelectric component (11) and the second piezoelectric component (12) are connected via a partition plate (31).

4. The power generation device using bridge vibration according to claim 3 is characterized in that: The first piezoelectric component (11) and the first elastic component (21) are connected via a force transmission plate (32), and the second piezoelectric component (12) and the second elastic component (22) are connected via a force transmission plate (32).

5. The power generation device using bridge vibration according to claim 4, characterized in that: If the first elastic component (21) and the second elastic component (22) are both arranged in the horizontal direction, the partition plate (31) is connected to a support member (5).

6. A power generation device using bridge vibration according to any one of claims 1 to 5, characterized in that: It also includes a rectification and voltage stabilization system and an energy storage system.

7. The power generation device using bridge vibration according to claim 6, characterized in that: The first piezoelectric component (11) and the second piezoelectric component (12) each include a plurality of piezoelectric ceramics (41), an insulating component (42) is provided between two adjacent piezoelectric ceramics (41), the piezoelectric ceramics (41) are connected to a contact plate (43), and the contact plate (43) is connected to a common line (44).

8. The power generation device using bridge vibration according to claim 6, characterized in that: The first piezoelectric component (11) and the second piezoelectric component (12) are both located at a mid-span cross-section of the bridge.

9. A bridge, characterized in that: It comprises a power generation device utilizing bridge vibration as described in any one of claims 1-8.

10. A bridge according to claim 9, characterized in that: There are at least two power generation devices, wherein the deformation directions of the first elastic components (21) of the two power generation devices are perpendicular to each other.

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