An energy harvesting device based on the principle of wire dancing

Abstract

The present invention discloses an energy harvesting device based on the principle of wire dancing, comprising a bracket; an elastic support member, which is arranged on the bracket; a wire, one end of which is arranged on the bracket, and the other end of which is arranged on the elastic support member, and the wire is installed in a relaxed state; a piezoelectric component, which is arranged on the elastic support member; and a power storage unit, which is connected to the piezoelectric component. This energy harvesting device based on the principle of wire dancing causes the wire to vibrate through external environmental excitation, and the wire vibration is applied to the elastic support member, causing the piezoelectric component to generate forced vibration and bend and deform, thereby causing changes in strain and stress in the piezoelectric component and generating free charges, thereby realizing the conversion from mechanical energy to electrical energy, thereby continuously providing the sensor with clean renewable energy.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to an energy collection device based on the principle of wire dancing. Background Art

[0002] Large-span bridges at home and abroad have begun to install structural health monitoring systems to grasp the health status of the structure in real time. So far, bridge health monitoring and diagnosis systems have been widely used in the field of bridge engineering. However, the traditional layout of monitoring systems based on line power supply has many shortcomings, such as difficulty in layout, long cycle, high cost, and inconvenient maintenance. In recent years, there have also been reports of using batteries to power sensor nodes. However, this model also has certain defects. For example, the battery needs to be replaced regularly, and in some cases the replacement operation is extremely inconvenient or the replacement cost is too high. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an energy harvesting device based on the principle of wire dancing, which can continuously provide clean renewable energy.

[0004] According to a first aspect of an embodiment of the present invention, there is provided an energy harvesting device based on the principle of wire dancing, comprising a bracket; an elastic support member, arranged on the bracket; a wire, one end of the wire being arranged on the bracket, and the other end of the wire being arranged on the elastic support member, the wire being installed in a relaxed state; a piezoelectric component, arranged on the elastic support member; and a power storage unit, connected to the piezoelectric component.

[0005] Beneficial effects: This energy harvesting device based on the principle of wire dancing causes wire vibration through external environmental excitation. The wire vibration is applied to the elastic support, causing the piezoelectric component to produce forced vibration and bending deformation, which in turn causes changes in strain and stress in the piezoelectric component and generates free charges, thereby realizing the conversion of mechanical energy into electrical energy, thereby providing a continuous supply of clean renewable energy.

[0006] According to the energy harvesting device based on the wire dancing principle in the first aspect of the embodiment of the present invention, the elastic support member is a cantilever structure, the inner end of the elastic support member is fixed on the bracket, and the outer end of the elastic support member is cantilevered. The cantilever structure can more easily collect external environmental excitation and increase the frequency of wire vibration.

[0007] According to the energy harvesting device based on the wire dancing principle in the first embodiment of the present invention, one end of the wire is arranged at the outer end of the elastic support member, and the piezoelectric component is arranged at the inner end of the elastic support member, so as to ensure more stable vibration harvesting.

[0008] According to the energy harvesting device based on the wire dancing principle in the first aspect of the embodiment of the present invention, a second support member is provided on the bracket, the second support member is parallel to the elastic support member, and the other end of the wire is arranged on the second support member, so that the wire is placed vertically and the vibration effect is more obvious.

[0009] According to the energy harvesting device based on the wire dancing principle of the first aspect of the embodiment of the present invention, the second support member is also made of elastic material to improve the vibration harvesting efficiency.

[0010] According to the energy harvesting device based on the conductor dancing principle in the first aspect of the embodiment of the present invention, the cross-sectional shape of the conductor is crescent-shaped or prism-shaped, so that the oscillation amplitude of the wire is larger when the wire is subjected to lateral velocity wind load, and low-frequency, large-amplitude self-excited vibration will be generated under the action of lateral wind force.

[0011] According to the energy harvesting device based on the wire dancing principle of the first aspect of the embodiment of the present invention, a control device is provided between the power storage unit and the piezoelectric component, and the control device includes an adjustment end and an output end. The adjustment end controls the input power of the power storage unit, and the output end is connected to the power consumption unit, and the control device is set to distribute power.

[0012] According to the energy harvesting device based on the wire dancing principle in the embodiment of the first aspect of the present invention, the wire is made of flexible material and the force is more reasonable.

[0013] According to the energy harvesting device based on the wire dancing principle in the first aspect of the embodiment of the present invention, the elastic support is made of elastic metal material to better transmit vibration.

[0014] According to the energy harvesting device based on the wire dancing principle of the first embodiment of the present invention, the material of the piezoelectric component is polyvinylidene fluoride or polypropylene, which ensures good power generation function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0017] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0018] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0020] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0021] Reference Figure 1 , an energy harvesting device based on the principle of wire dancing, comprising a bracket 10; an elastic support 20, arranged on the bracket 10; a wire 30, one end of the wire 30 is arranged on the bracket 10, and the other end of the wire 30 is arranged on the elastic support 20, and the wire 30 is installed in a loose state, that is, the two ends are fixed and the middle can shake; a piezoelectric component 40, arranged on the elastic support 20; an electric power storage unit, connected to the piezoelectric component 40, and the piezoelectric component 40 is connected to the electric power storage unit by a lead-out wire. This energy harvesting device based on the principle of wire dancing causes the wire 30 to vibrate through external environmental excitation, and the vibration of the wire 30 is applied to the elastic support 20, so that the piezoelectric component 40 generates forced vibration and bends and deforms, thereby causing changes in strain and stress in the piezoelectric film in the piezoelectric component 40, and generates free charge, thereby realizing the conversion from mechanical energy to electrical energy, thereby continuously providing clean renewable energy.

[0022] In this embodiment, the elastic support member 20 is a cantilever structure, the inner end of the elastic support member 20 is fixed on the bracket 10, and the outer end of the elastic support member 20 is cantilevered. The cantilever structure is more likely to collect external environmental excitation and increase the vibration frequency of the wire 30. One end of the wire 30 is arranged at the outer end of the elastic support member 20, and the piezoelectric component 40 is arranged at the inner end of the elastic support member 20, ensuring that the vibration collection is more stable.

[0023] In this embodiment, a second support member 11 is provided on the bracket 10, and the second support member 11 is parallel to the elastic support member 20. The other end of the wire 30 is provided on the second support member 11, so that the wire 30 is placed vertically, and the vibration effect is more obvious. The second support member 11 is also made of elastic material, and the second support member 11 has the same structure as the elastic support member 20, which improves the collection efficiency of vibration.

[0024] In this embodiment, the cross-sectional shape of the conductor 30 is crescent-shaped or prism-shaped, so that the oscillation amplitude of the wire is larger when it is subjected to the lateral velocity wind load, and low-frequency, large-amplitude self-excited vibration will be generated under the action of lateral wind force. Preferably, the cross-sectional shape of the conductor 30 can be designed according to the specific conditions of the local wind field, and is designed based on the optimal wind attack angle. The optimal wind attack angle is a certain angle formed by the incoming wind speed and the aerodynamic force. Under a certain wind speed, this angle can make the conductor 30 produce a maximum displacement dance.

[0025] In this embodiment, the wire 30 is made of a flexible material, and the force is more reasonable, especially the pulling force at both ends of the wire 30 is appropriate.

[0026] In this embodiment, the elastic support member 20 is made of elastic metal material to better transmit vibration. Steel and beryllium bronze are preferred. The shape and size of the elastic support member 20 are designed to ensure that the natural frequency of the elastic support member 20 is consistent with the frequency of the dancing of the wire 30.

[0027] In this embodiment, the piezoelectric component 40 is generally made of a material with good flexibility, low density, and can be made into a large-area piezoelectric film, and low mechanical impedance, such as polyvinylidene fluoride or polypropylene, to ensure good power generation function.

[0028] In this embodiment, a control device is provided between the power storage unit and the piezoelectric component 40. The control device includes a regulating end and an output end. The regulating end controls the input power of the power storage unit. The output end is connected to the power consumption unit. The control device is provided to distribute power.

[0029] This energy harvesting device based on the principle of galloping conductors includes a bracket 10 and an elastic support member 20. A piezoelectric component 40 is provided on the elastic support member 20. The bracket 10 and the elastic support member 20 form a "C"-shaped frame, and a slack conductor 30 is arranged between the bracket 10 and the elastic support member 20. The conductor 30 has a special aerodynamic shape including a crescent shape or a rhombus shape. When the conductor 30 is subjected to a lateral velocity wind load, an up-and-down acceleration motion will be generated, causing the conductor 30 to be subjected to an aerodynamic moment and thus generating torsion. When the frequency of the torsional motion is synchronized with the frequency of its vertical motion, galloping of the conductor 30 will occur, further causing vibration of the elastic support member 20. The piezoelectric component 40 generates a forced vibration and undergoes bending deformation, thereby causing changes in the strain and stress in the piezoelectric film of the piezoelectric component 40. When changes occur in the strain and stress in the piezoelectric film, free charges will be generated on its surface, thus realizing the conversion of the device from mechanical energy to electrical energy. The electrical energy generated by the piezoelectric component 40 is distributed through a control device. Part of the input power is stored in the power storage unit, and part is used by the power-consuming unit. The power-consuming unit can be any device on the bridge engineering such as a sensor. This device can bring clean and renewable energy to devices such as sensors for monitoring bridge engineering at any time.

[0030] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can also be made without departing from the gist of the present invention.

Claims

1. An energy harvesting device based on the principle of wire dancing, characterized in that: include: Bracket; An elastic support member, arranged on the bracket, and the elastic support member is made of elastic metal material; A wire, one end of which is arranged on the bracket, the other end of which is arranged on the elastic support member, and the wire is installed in a loose state; A piezoelectric component is arranged on the elastic support member; A power storage unit connected to the piezoelectric component; One end of the wire is arranged at the outer end of the elastic support member, and the piezoelectric component is arranged at the inner end of the elastic support member; The bracket includes a second support member, the second support member is parallel to the elastic support member, and the other end of the wire is arranged on the second support member.

2. The energy harvesting device based on the wire dancing principle according to claim 1 is characterized in that: The elastic support member is a cantilever structure, the inner end of the elastic support member is fixed on the bracket, and the outer end of the elastic support member is cantilevered.

3. The energy harvesting device based on the wire dancing principle according to claim 1 is characterized in that: The second supporting member is also made of elastic material.

4. The energy harvesting device based on the wire dancing principle according to claim 1 is characterized in that: The cross-section of the wire is crescent-shaped or prism-shaped.

5. The energy harvesting device based on the wire dancing principle according to claim 4 is characterized in that: The wire is made of flexible material.

6. The energy harvesting device based on the wire dancing principle according to claim 1 is characterized in that: A control device is provided between the power storage unit and the piezoelectric component. The control device comprises a regulating end and an output end. The regulating end controls the input power of the power storage unit, and the output end is connected to the power consumption unit.

7. The energy harvesting device based on the wire dancing principle according to claim 1 is characterized in that: The material of the piezoelectric component is polyvinylidene fluoride or polypropylene.

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