Wave energy harvesting device based on piezoelectric ceramics

Abstract

The present invention discloses a wave energy collection device based on piezoelectric ceramics, comprising: a floating body, a storage battery arranged inside the floating body; a plurality of piezoelectric components, the plurality of piezoelectric components are distributed on the surface of the floating body, the plurality of piezoelectric components are connected to the storage battery, and the energy collected by the plurality of piezoelectric components is stored. The present invention has the beneficial effect of capturing wave energy and converting it into electrical energy.

Description

Technical Field

[0001] The present invention relates to the field of energy utilization, and more specifically, to a wave energy collection device based on piezoelectric ceramics. Background Art

[0002] With the continuous development of society and economy, and the rapid expansion of the world's population, the energy consumed by humans is also increasing, but the energy reserves of the entire earth are limited, and energy issues are receiving more and more attention. At present, the development and utilization of new energy, the realization of sustainable development of energy, and the satisfaction of human demand for energy have become a worldwide issue.

[0003] The ocean surface accounts for 71% of the total area of ​​the earth. At sea level, the average depth of the global ocean is 380 meters, and the volume of the entire seawater is as much as square kilometers. The vast ocean not only provides shipping, aquatic products and rich minerals for humans, but also contains huge energy. Ocean energy usually refers to the renewable natural energy contained in the ocean, mainly tidal energy, wave energy, ocean current energy (tidal energy), seawater temperature difference energy and seawater salinity difference energy. It is a renewable energy with huge energy and is clean and pollution-free. In a broader sense, ocean energy also includes wind energy over the ocean, solar energy on the ocean surface, and marine biomass energy. According to the storage form, it can be divided into mechanical energy, thermal energy and chemical energy. Among them, tidal energy, ocean current energy and wave energy are stored in the form of mechanical energy.

[0004] Wave energy is mainly energy generated by the periodic movement of seawater in the horizontal direction caused by the action of wind. It generally exists in the form of mechanical energy and is widely used. Wave energy power generation can be divided into two categories: energy collection system and energy conversion system. The function of the energy collection system is to capture wave energy. Its main forms are: oscillating water column type, oscillating float type, pendulum type, duck type, raft type, contraction ramp type, clam type, etc. The function of the energy conversion system is to convert the captured wave energy into a certain form of mechanical energy or electrical energy. It is mainly composed of several parts such as air impeller, low head turbine, hydraulic system, mechanical system and generator.

[0005] Wave energy is a high-quality renewable energy. According to the survey results of the World Energy Council, the available wave energy in the world reaches 2 billion kW, which is a considerable amount. The development and utilization of wave energy is of great significance to alleviating the energy crisis and reducing environmental pollution. Summary of the invention

[0006] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0007] Another object of the present invention is to provide a wave energy collection device based on piezoelectric ceramics, in which the piezoelectric component generates vibrations, and the piezoelectric ceramics utilize the piezoelectric effect to convert mechanical energy into electrical energy, which has the beneficial effect of capturing wave energy and converting it into electrical energy.

[0008] In order to achieve these purposes and other advantages according to the present invention, a wave energy collection device based on piezoelectric ceramics is provided, comprising:

[0009] A floating body having a storage battery disposed therein;

[0010] A plurality of piezoelectric components are distributed on the surface of the floating body, and the plurality of piezoelectric components are connected to the storage battery to store the energy collected by the plurality of piezoelectric components.

[0011] Preferably, the floating body is a truncated cone-shaped cavity.

[0012] Preferably, it further comprises: a counterweight block, which is arranged on the narrower end surface of the floating body.

[0013] Preferably, it further comprises: a base, which is arranged on the outside of the counterweight block, the base is connected to the narrower end surface of the floating body, and the lower end of the base is lower than the lower end of the counterweight block.

[0014] Preferably, the base includes a first annular metal ring, a plurality of first support rods, and a second annular metal ring, the diameter of the second annular metal ring is smaller than the diameter of the first annular metal ring and is equal to the diameter of the narrower end face of the float, the second annular metal ring is connected to the narrower end face of the float, and a plurality of first support rods are connected to the first annular metal ring at their lower ends and connected to the second annular metal ring at their upper ends.

[0015] Preferably, there is a detection instrument cavity and a top cover, wherein the detection instrument cavity is connected to the floating body and is used to place different types of detection instruments, and the top cover is detachably arranged on the top of the detection instrument cavity.

[0016] Preferably, the top cover comprises a cover body, a plurality of second support rods and a third annular metal ring, the cover body is a spherical surface, and the lower ends of the plurality of second support rods are connected to the edge of the cover body and the upper ends are connected to the third annular metal ring.

[0017] Preferably, the piezoelectric component includes a vibrator, a cantilever, an electrode, and a piezoelectric ceramic. One end of the cantilever is connected to the float and the other end is connected to the vibrator. The electrode is laid on the upper side of the cantilever along the extension direction of the cantilever and the piezoelectric ceramic is laid on the lower side. The electrode is connected to the battery.

[0018] The present invention has at least the following beneficial effects:

[0019] Taking full advantage of piezoelectric ceramics and the piezoelectric effect, combined with piezoelectric ceramic vibration energy capture technology, a new piezoelectric component structure for energy harvesting was designed;

[0020] For oceans and other waters, piezoelectric ceramic vibration energy capture technology is applied to wave energy collection, which innovates the energy collection method.

[0021] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a rendering of a wave energy collection device based on piezoelectric ceramics according to one of the technical solutions of the present invention;

[0023] Figure 2 This is a schematic structural diagram of a wave energy collection device based on piezoelectric ceramics according to one of the technical solutions of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of a piezoelectric component according to one of the technical solutions of the present invention;

[0025] Figure 4 This is a schematic diagram of the deformation structure of a piezoelectric component according to one of the technical solutions of the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0027] In the description of the present invention, the terms "surface", "end face", "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They 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 cannot be understood as a limitation on the present invention.

[0028] like Figures 1 to 4 As shown, the present invention provides a wave energy collection device based on piezoelectric ceramics, comprising:

[0029] The floating body 1 has a storage battery inside, and the floating body 1 has a hollow structure inside, which reduces the density of the energy collection device, so that the energy collection device floats on the water surface and is vibrated by waves;

[0030] A plurality of piezoelectric components 2 are distributed on the surface of the floating body 1, and the plurality of piezoelectric components 2 are connected to the battery to store the energy collected by the plurality of piezoelectric components 2. The piezoelectric components 2 are deformed by the vibration of the waves and the piezoelectric effect is used to convert the mechanical energy into electrical energy.

[0031] In the above technical solution, the wave energy collection device floats on the water surface, and the piezoelectric component 2 is deformed by the vibration of the waves. The piezoelectric component 2 converts the mechanical energy generated by the deformation into electrical energy, and the piezoelectric component 2 transmits the electrical energy to the battery for storage. When the piezoelectric component 2 is deformed, polarization occurs, and the electrical energy is collected by the electrodes on the upper and lower surfaces, and transmitted to the battery for storage through the circuit. The piezoelectric effect refers to the deformation of certain dielectric crystals under the action of external forces, which causes the relative displacement of the positive and negative charge centers inside, resulting in the appearance of polarized charges of opposite signs on its surface. Piezoelectric ceramic vibration energy capture technology makes full use of the piezoelectric effect, and converts the mechanical energy of the vibration deformation of piezoelectric ceramics into electrical energy through certain structures and circuits.

[0032] In another technical solution, the floating body 1 is a truncated cone-shaped cavity, which provides a structural basis for the wave energy collection device to be suspended on the water surface.

[0033] In another technical solution, it also includes: a counterweight block 3, which is arranged on the narrower end face of the floating body 1. The counterweight block 3 is connected to the floating body 1 by bolts, which can ensure that the wave energy collection device maintains a vertical suspension direction and avoids the wave energy collection device from tilting. In addition, the bottom of the bolt connecting the counterweight block 3 is processed with a hole, which can be connected to the anchor chain to fix the wave energy collection device within a certain water range.

[0034] In another technical solution, it also includes: a base 4, which is arranged on the outside of the counterweight block 3, and the base 4 is connected to the narrower end face of the floating body 1. The lower end of the base 4 is lower than the lower end of the counterweight block 3, which is convenient for placing the wave energy collection device on land.

[0035] In another technical solution, the base 4 includes a first annular metal ring 401, a plurality of first support rods 402, and a second annular metal ring 403. The diameter of the second annular metal ring 403 is smaller than the diameter of the first annular metal ring 401 and is equal to the diameter of the narrower end face of the float 1. The second annular metal ring 403 is connected to the narrower end face of the float 1. The lower ends of the plurality of first support rods 402 are connected to the first annular metal ring 401 and the upper ends are connected to the second annular metal ring 403. The base 4 is small at the top and large at the bottom to prevent the wave energy collection device from tipping over when placed on the ground.

[0036] In another technical solution, there is a detection instrument cavity 5 and a top cover 6. The detection instrument cavity 5 is connected to the floating body 1 and is used to place different types of detection instruments. The top cover 6 is detachably arranged on the top of the detection instrument cavity 5. Different detection instruments can be arranged in the detection instrument cavity 5 according to different research and investigation needs. The wave energy collection device is powered by the energy collected by the wave energy collection device itself, so that the wave energy collection device can have other functions such as hydrological detection and wind detection while collecting energy.

[0037] In another technical solution, the top cover 6 includes a cover body 601, a plurality of second support rods 602 and a third annular metal ring 603. The cover body 601 is a spherical surface, which guides the water flow and avoids water accumulation. The lower ends of the plurality of second support rods 602 are connected to the edge of the cover body 601 and the upper ends are connected to the third annular metal ring 603, so as to facilitate the installation of different detection instruments into the detection instrument cavity.

[0038] In another technical solution, the piezoelectric component 2 includes a vibrator 201, a cantilever 202, an electrode 203, and a piezoelectric ceramic 204. One end of the cantilever 202 is connected to the float 1, and the other end is connected to the vibrator 201. The electrode 203 is laid on the upper side of the cantilever 202 along the extension direction of the cantilever 202, and the piezoelectric ceramic 204 is laid on the lower side. The electrode 203 is connected to the battery. The vibrator 201 at the end of the cantilever 202 can increase the vibration amplitude of the piezoelectric component 2. The piezoelectric ceramic 204 is deformed during the vibration process. The electric energy generated by the piezoelectric ceramic 204 is collected by the electrode 203, and the electrode 203 transmits the electric energy to the battery for storage. In actual applications, the piezoelectric component 2 is wrapped with an insulating layer to achieve safe and efficient energy collection.

[0039] The present invention is a new type of wave energy collection device designed for ocean energy collection, with piezoelectric ceramics and piezoelectric effect as the core, combined with piezoelectric ceramic vibration energy capture technology. The working environment of this wave energy collection device is the surface of the ocean or lake. With the help of the external structure that is wide at the top and narrow at the bottom and the counterweight at the bottom, the wave energy collection device can float relatively vertically on the water surface, and can be anchored in a fixed position by adding an anchor chain at the bottom. The side wall of this wave energy collection device is loaded with dozens of piezoelectric components 2 for collecting energy. The surface of the piezoelectric component 2 has been insulated. As the wave energy collection device continues to vibrate, the piezoelectric component 2 shakes and deforms. At this time, the piezoelectric ceramic converts the deformation into electrical energy through the piezoelectric effect, and the electrode completes the energy collection by capturing this electrical energy. The energy collected by this wave energy collection device can be used for the electricity consumption of marine light signs or other detection equipment carried, and the electrical energy collected by large-scale energy collection devices can be used for human life.

[0040] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A wave energy collection device based on piezoelectric ceramics, characterized in that: include: A floating body (1) having a storage battery disposed therein; A plurality of piezoelectric components (2), the plurality of piezoelectric components (2) are distributed on the surface of the floating body (1), the plurality of piezoelectric components (2) are connected to the storage battery, and the energy collected by the plurality of piezoelectric components (2) is stored; The floating body (1) is a truncated cone-shaped cavity; It also includes: a counterweight block (3) which is arranged on a narrow end surface of the floating body (1); It also comprises: a base (4) which is arranged on the outside of the counterweight (3), the base (4) being connected to the narrower end surface of the floating body (1), and the lower end of the base (4) being lower than the lower end of the counterweight (3); The base (4) comprises a first annular metal ring (401), a plurality of first support rods (402), and a second annular metal ring (403); the diameter of the second annular metal ring (403) is smaller than the diameter of the first annular metal ring (401) and is equal to the diameter of the narrower end face of the floating body (1); the second annular metal ring (403) is connected to the narrower end face of the floating body (1); the lower ends of the plurality of first support rods (402) are connected to the first annular metal ring (401), and the upper ends are connected to the second annular metal ring (403); The piezoelectric component (2) comprises a vibrator (201), a cantilever (202), an electrode (203), and a piezoelectric ceramic (204); one end of the cantilever (202) is connected to the floating body (1), and the other end is connected to the vibrator (201); the electrode (203) is laid on the upper side of the cantilever (202) along the extension direction of the cantilever (202), and the piezoelectric ceramic (204) is laid on the lower side; the electrode (203) is connected to the battery.

2. The wave energy collection device based on piezoelectric ceramics according to claim 1, characterized in that: Also includes: A detection instrument chamber (5) and a top cover (6), wherein the detection instrument chamber (5) is connected to the floating body (1) and is used to place different types of detection instruments, and the top cover (6) is detachably arranged on the top of the detection instrument chamber (5).

3. The wave energy collection device based on piezoelectric ceramics as claimed in claim 2, characterized in that: The top cover (6) comprises a cover body (601), a plurality of second support rods (602) and a third annular metal ring (603); the cover body (601) is a spherical surface; the lower ends of the plurality of second support rods (602) are connected to the edge of the cover body (601) and the upper ends are connected to the third annular metal ring (603).

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