A piezoelectric-triboelectric energy harvester

Abstract

The present invention discloses a piezoelectric triboelectric energy harvester, which relates to the field of fluid energy harvesting technology and includes: a vortex-induced vibration module, which includes a vibration column assembly, and the vibration column assembly can generate movement under the action of a fluid; a piezoelectric module, which includes a piezoelectric sheet, which is mounted on a support member and connected to the vibration column assembly via a connector. When the vibration column assembly moves, the piezoelectric sheet can be driven by the connector to generate deformation to generate electricity; a triboelectric module, which is mounted on the vibration column assembly. When the vibration column assembly moves, the triboelectric module can generate electricity by friction; and a magneto-induced vibration module, which includes a corresponding moving magnet and a fixed magnet. The moving magnet is mounted in the vibration column assembly and can move with the vibration column assembly to cause the vibration column assembly to generate magneto-induced vibration. The present invention can combine vortex-induced vibration and magneto-induced vibration to improve energy conversion efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid energy collection, in particular to a piezoelectric-triboelectric energy harvester. Background Art

[0002] Vibration primarily takes the form of mechanical energy, tidal energy, wind energy, and hydropower. Compared to other vibrational energy sources, hydropower, as a new energy source, offers advantages such as environmental friendliness, sustainability, and widespread distribution. Therefore, effectively harvesting hydropower has become a hot topic of discussion. With the increasing application of micro- and nano-devices, micro-energy technologies are attracting significant attention and attention from researchers both domestically and internationally. Among these, utilizing vortex-induced vibrations to harvest fluid energy is a major research topic.

[0003] At present, piezoelectric-triboelectric energy harvesters are usually used to collect fluid energy. However, existing piezoelectric-triboelectric energy harvesters only have one vibration working mode, vortex-induced vibration, and have low energy conversion efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a piezoelectric-triboelectric energy harvester to solve the problems existing in the above-mentioned prior art, which can combine vortex-induced vibration and magneto-induced vibration to improve energy conversion efficiency.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a piezoelectric-triboelectric energy harvester, comprising:

[0007] A vortex-induced vibration module, comprising a vibration column assembly capable of generating motion under the action of a fluid;

[0008] A piezoelectric module, comprising a piezoelectric sheet mounted on a support member and connected to the vibration column assembly via a connector. When the vibration column assembly moves, the connector can drive the piezoelectric sheet to deform, thereby generating electricity.

[0009] a triboelectric module, the triboelectric module being mounted on the vibrating column assembly and capable of generating electricity by friction when the vibrating column assembly moves;

[0010] The magnetic vibration module includes a correspondingly arranged moving magnet and fixed magnet. The moving magnet is installed in the vibration column assembly and can move with the vibration column assembly to cause the vibration column assembly to generate magnetic vibration.

[0011] Preferably, the piezoelectric-triboelectric energy harvester also includes a bottom support plate, the vibration column assembly is perpendicular to the bottom support plate, the fixed magnet is vertically arranged on the bottom support plate, and the support member is a side support plate, which is vertically connected to the bottom support plate.

[0012] Preferably, the vibration column assembly includes two vibration columns connected in sequence from bottom to top, and the bottom of the lower vibration column and the top of the upper vibration column are both connected to the triboelectric module.

[0013] Preferably, the vibration column assemblies are arranged in multiple rows along the fluid flow direction, the vibration column assemblies in each row are staggered, and the diameters of the vibration column assemblies in each row are different.

[0014] Preferably, the vibration column assemblies are provided in three rows, the first row and the second row are each provided with two vibration column assemblies, the second row is provided with one vibration column assembly, and all the vibration column assemblies are arranged in an X shape.

[0015] Preferably, a plurality of moving magnets are provided in each of the vibration columns, and the moving magnets include moving magnets arranged in a transverse direction and moving magnets arranged in a longitudinal direction.

[0016] Preferably, each of the vibration columns is provided with two moving magnets arranged in the transverse direction and one moving magnet arranged in the longitudinal direction, and three fixed magnets are provided, including a first fixed magnet, a second fixed magnet and a third fixed magnet; wherein, the first fixed magnet and the third fixed magnet are parallel to the moving magnet arranged in the transverse direction, the second fixed magnet is parallel to the moving magnet arranged in the longitudinal direction, and all the vibration column components are located between the first fixed magnet and the second fixed magnet, and the moving magnet arranged in the longitudinal direction is located on the side of the vibration column close to the second fixed magnet.

[0017] Preferably, the movable magnet and the adjacent fixed magnet arranged in the transverse direction repel each other, and the movable magnet and the second fixed magnet arranged in the longitudinal direction attract each other.

[0018] Preferably, the triboelectric module includes a waterproof box and a nano-triboelectric power generation unit in an independent layer mode, and the nano-triboelectric power generation unit is arranged in the waterproof box.

[0019] Preferably, the piezoelectric sheet is an MFC piezoelectric sheet.

[0020] Preferably, the vibration column is a cylinder, and a plurality of super surface patterns are provided on the surface of the vibration column.

[0021] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0022] The piezoelectric-triboelectric energy harvester of the present invention is provided with a vortex-induced vibration module, which can generate movement under the action of fluid, and drive the triboelectric module to move to generate frictional electricity, and drive the piezoelectric piece to generate deformation electricity, thereby realizing fluid energy collection; moreover, the piezoelectric-triboelectric energy harvester of the present invention is also provided with a magneto-induced vibration module, which can make the vibration column assembly generate magneto-induced vibration, thereby realizing the combination of vortex-induced vibration and magneto-induced vibration, effectively improving the energy conversion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A three-dimensional assembly diagram of a piezoelectric-triboelectric energy harvester according to an embodiment of the present invention;

[0025] Figure 2 Schematic diagram of an explosion of a vibrating column according to an embodiment of the present invention;

[0026] Figure 3 This is an exploded schematic diagram of a waterproof box according to an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of the working principle of the piezoelectric-triboelectric energy harvester in an embodiment of the present invention;

[0028] Figure 5 Schematic diagram of a vibrating column provided with a super surface pattern in an embodiment of the present invention;

[0029] Figure 6 Schematic diagram of the super surface pattern in an embodiment of the present invention;

[0030] Among them, 1-first piezoelectric sheet, 2-second piezoelectric sheet, 3-third piezoelectric sheet, 4-fourth piezoelectric sheet, 5-fifth piezoelectric sheet, 6-side support plate, 7-first I-type cantilever beam, 8-second I-type cantilever beam, 9-third I-type cantilever beam, 10-first waterproof box, 11-first vibration column, 12-second vibration column, 13-second waterproof box, 14-first fixed magnet, 15-third waterproof box, 16-third vibration column, 17-fourth waterproof box, 18-fourth vibration column, 19-fifth vibration column, 20-fifth waterproof box, 21-second fixed magnet, 22- Sixth vibration column, 23-sixth waterproof box, 24-seventh waterproof box, 25-seventh vibration column, 26-third fixed magnet, 27-eighth vibration column, 28-eighth waterproof box, 29-ninth waterproof box, 30-ninth vibration column, 31-tenth vibration column, 32-tenth waterproof box, 33-fourth type cantilever beam, 34-fifth type cantilever beam, 35-first moving magnet, 36-second moving magnet, 37-third moving magnet, 38-first acrylic plate, 39-AL film, 40-spring, 41-FEP film, 42-second acrylic plate, 43-box cover. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide a piezoelectric-triboelectric energy harvester to solve the problems existing in the above-mentioned prior art, which can combine vortex-induced vibration and magneto-induced vibration to improve energy conversion efficiency.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] like Figures 1-6As shown, this embodiment provides a piezoelectric-triboelectric energy harvester, which mainly includes a vortex-induced vibration module, a piezoelectric module, a triboelectric module and a magneto-induced vibration module; wherein, the vortex-induced vibration module includes a vibration column assembly, and the vibration column assembly can generate movement under the action of fluid, wherein the longitudinal direction refers to the direction parallel to the flow direction of the fluid when the piezoelectric-triboelectric energy harvester acts on the fluid, and the direction perpendicular to the longitudinal direction is the transverse direction. Furthermore, the fluid can be air or water flow, etc., and this embodiment is preferably described using water flow as an example; the piezoelectric module includes a piezoelectric sheet, which is installed on a support member, and the piezoelectric sheet is connected to the vibration column assembly through a connecting member. When the vibration column assembly moves, the piezoelectric sheet can be driven by the connecting member to generate deformation to generate electricity; the triboelectric module is installed on the vibration column assembly, and when the vibration column assembly moves, the triboelectric module can generate electricity by friction; the magneto-induced vibration module includes correspondingly arranged moving magnets and fixed magnets, and the moving magnet is installed in the vibration column assembly and can move with the vibration column assembly to cause the vibration column assembly to generate magneto-induced vibration.

[0036] In this embodiment, the piezoelectric-triboelectric energy harvester is provided with a vortex-induced vibration module, which can generate lateral movement under the action of fluid, and drive the triboelectric module to move to generate frictional electricity, and drive the piezoelectric piece to generate deformation electricity, thereby realizing fluid energy collection; moreover, in this embodiment, the piezoelectric-triboelectric energy harvester is also provided with a magneto-induced vibration module, which can make the vibration column assembly generate magneto-induced vibration, thereby realizing the combination of vortex-induced vibration and magneto-induced vibration. In the bistable working mode, the movement amplitude of the vibration column assembly is increased, and the energy conversion effect is effectively improved.

[0037] In this embodiment, the piezoelectric-triboelectric energy harvester also includes a horizontally arranged bottom support plate, the vibration column assembly is perpendicular to the bottom support plate, the fixed magnet is vertically arranged on the bottom support plate, and the support member is a side support plate 6, which is vertically connected to one side of the bottom support plate to form an L-shaped base; in the initial state, the connecting member is perpendicular to the side support plate 6, wherein the connecting member is preferably an I-shaped cantilever beam.

[0038] In this embodiment, the vibration column assembly includes two vibration columns connected sequentially from bottom to top, wherein the vibration columns are blunt bodies, preferably cylindrical blunt bodies. In the initial state, the two vibration columns are perpendicular to the bottom support plate, and the bottom of the lower vibration column and the top of the upper vibration column are both connected to the triboelectric module. The two vibration columns are connected to the same connecting member and are symmetrically arranged about the center plane of the connecting member, where the center plane is a transverse center plane, that is, a support plane parallel to the bottom support plate. The vibration column assembly in this embodiment adopts a dual-cylindrical symmetrical distribution structure, which enhances the stability of the device while improving the efficiency of the device in collecting mechanical energy.

[0039] Furthermore, the vibration column assemblies are arranged in multiple rows along the fluid flow direction, the vibration column assemblies in each row are staggered, and the diameters of the vibration column assemblies in each row are different; specifically, the vibration column assemblies are arranged in three rows, the first row and the second row are each provided with two vibration column assemblies, and the second row is provided with one vibration column assembly, for a total of five groups of vibration column assemblies, and all the vibration column assemblies are arranged in an X shape; wherein, Figure 1 and Figure 4 As shown, the first row of vibration column assemblies is close to the incoming flow direction, followed by the second row of vibration column assemblies and the third row of vibration column assemblies. One of the vibration column assemblies in the first row includes a fourth vibration column 18 and a fifth vibration column 19 symmetrically arranged up and down, another vibration column assembly in the first row includes an eighth vibration column and a seventh vibration column symmetrically arranged up and down, the second row of vibration column assemblies includes a third vibration column 16 and a sixth vibration column 22 symmetrically arranged up and down, one of the vibration column assemblies in the third row includes a first vibration column 11 and a second vibration column 12 arranged up and down, and another vibration column assembly in the third row includes a tenth vibration column 31 and a ninth vibration column 30 arranged up and down.

[0040] It should be further explained that, in this embodiment, the diameter of the third row of vibration column assemblies is greater than the diameter of the first row of vibration column assemblies and greater than the diameter of the second row of vibration column assemblies, thereby realizing an X-shaped arrangement of "large, medium and large" vibration column diameters, wherein the diameters of the vibration column assemblies in the same row can be the same or different; further, the number and distribution of vibration column assemblies can also be selected according to specific work needs, as long as the diameters of the vibration column assemblies in each row are different and are staggered, such as all vibration column assemblies can be arranged in a W-shape, M-shape or regular pentagon, etc.

[0041] In this embodiment, by providing five groups of cylinders with different diameters, the adaptability of the device to flow rate is greatly improved compared to vibrating cylinders with the same diameter. Regardless of the flow rate, there are always cylinders vibrating, thereby improving the overall energy conversion efficiency of the device; by arranging the cylinders in an X-shape according to the diameters of "large, medium and small", the vibration energy of the water flow is collected from multiple angles and in all directions within a limited space, thereby improving the overall energy conversion performance of the device.

[0042] In this embodiment, a plurality of moving magnets are provided in each of the vibration columns, and the moving magnets include moving magnets arranged in the transverse direction and moving magnets arranged in the longitudinal direction; specifically, two moving magnets arranged in the transverse direction and one moving magnet arranged in the longitudinal direction are provided in each of the vibration columns, wherein the moving magnets arranged in the transverse direction are parallel to the incoming flow direction, and the moving magnets arranged in the longitudinal direction are perpendicular to the incoming flow direction; three fixed magnets are provided, including a first fixed magnet 14, a second fixed magnet 21 and a third fixed magnet; wherein the first fixed magnet 14 and the third fixed magnet are parallel to the moving magnet arranged in the transverse direction, and the second fixed magnet 21 is parallel to the moving magnet arranged in the longitudinal direction, and all the vibration column components are located between the first fixed magnet 14 and the second fixed magnet 21, and the moving magnet arranged in the longitudinal direction is located on the side of the vibration column close to the second fixed magnet 21.

[0043] like Figure 2 As shown, three accommodating grooves are provided in the vibration column near its outer wall, and the accommodating grooves are provided in a one-to-one correspondence with the moving magnets. Each accommodating groove can accommodate a moving magnet, and the moving magnet and the accommodating groove are parallel to the axial direction of the vibration column; wherein, the two moving magnets arranged in the transverse direction are the first moving magnet 35 and the third moving magnet 37, respectively, and the moving magnet arranged in the longitudinal direction is the second moving magnet 36, the second moving magnet 36 is arranged close to the second fixed magnet 21, the first moving magnet 35 and the third moving magnet 37 are respectively arranged on both sides of the second moving magnet 36, the second fixed magnet 21 is fixed to the side of the bottom support plate close to the incoming flow direction, and the side support plate 6 is parallel to the second fixed magnet 21, and is arranged on the other side of the bottom support plate relative to the second fixed magnet 21.

[0044] In this embodiment, the magneto-induced vibration module is in a transverse repulsion and longitudinal attraction mode, that is, the moving magnets arranged in the transverse direction and the adjacent fixed magnets, as well as the adjacent moving magnets arranged in the transverse direction, repel each other, and the moving magnets arranged in the longitudinal direction and the second fixed magnet 21 attract each other.

[0045] In this embodiment, a transverse repulsion and longitudinal attraction magnetic piezoelectric-friction energy harvester structure is set. Compared with the transverse attraction magnetic field and the longitudinal attraction magnetic field (transverse attraction and longitudinal attraction), the transverse repulsion magnetic field and the longitudinal repulsion magnetic field (transverse repulsion and longitudinal repulsion), and the transverse attraction magnetic field and the longitudinal repulsion magnetic field (transverse attraction and longitudinal repulsion), the natural frequency is lower, and it is easier to vibrate at a lower flow rate, so that the flow rate range required for vortex-induced resonance is lower, thereby enhancing the energy harvesting characteristics in a low-flow water flow environment. Moreover, under the action of the additional transverse repulsion and longitudinal attraction magnetic field force, the piezoelectric-friction electric energy harvester has a larger vibration deformation and a higher output voltage. The vibration frequency band of the piezoelectric-friction electric energy harvester is wider, that is, the locking area of ​​the vortex-induced vibration is wider. At the same water flow rate, compared with the piezoelectric-friction electric energy harvester without magnetic attachment, the output voltage can be increased by 57.8%, which greatly improves the overall energy conversion efficiency of the device.

[0046] In this embodiment, the triboelectric module includes a waterproof box and a nano-triboelectric power generation unit in an independent layer mode, and the nano-triboelectric power generation unit is arranged in the waterproof box; wherein the number of waterproof boxes matches the number of vibration columns, and ten waterproof boxes are provided. Figure 1 As shown, a first waterproof box 10 is provided at the top of the first vibrating column 11, a second waterproof box 13 is provided at the bottom of the second vibrating column 12, a third waterproof box 15 is provided at the top of the third vibrating column 16, a fourth waterproof box 17 is provided at the top of the fourth vibrating column 18, a fifth waterproof box 20 is provided at the bottom of the fifth vibrating column 19, a sixth waterproof box 23 is provided at the bottom of the sixth vibrating column 22, a seventh waterproof box 24 is provided at the bottom of the seventh vibrating column, an eighth waterproof box is provided at the top of the eighth vibrating column, a ninth waterproof box is provided at the bottom of the ninth vibrating column 30, and a tenth waterproof box 33 is provided at the top of the tenth vibrating column 31. As a preferred embodiment, the vibrating columns in this embodiment are connected to the corresponding waterproof boxes via connecting shafts, and each waterproof box is covered with a box cover 43.

[0047] In this embodiment, the nano-friction power generation unit is a mature existing technology in this field and can be selected according to specific work needs; specifically, Figure 3 As shown, the nano-friction power generation unit mainly includes FEP (fluorinated ethylene propylene copolymer) film and AL film 39 (aluminum film). A first acrylic plate 38 is arranged in the waterproof box. The AL film 39 is deposited on the first acrylic plate 38 as a metallic conductive material. Eight grid-like structures are cut out on the second acrylic plate 42 to support the FEP film 41 as a base. The FEP film 41 is pasted on the bottom of the second acrylic plate 42 as an independent layer (friction layer). The first acrylic plate 38 is also divided into 8 equal parts, maintaining the same periodicity as the independent layer. After a layer of AL film 39 is deposited on the first acrylic plate 38, two groups of grid structures are obtained. Two springs 40 are provided at both ends of the second acrylic plate 42, which are connected to the waterproof box through the springs 40. The springs 40 are parallel to the moving direction of the second acrylic plate 42. When the vibration column moves laterally under the action of the fluid, it drives the waterproof box at the end to move. The vibration energy of the waterproof box is converted into elastic potential energy of the spring 40, and the elastic potential energy is further converted into kinetic energy of the second acrylic plate 42, driving the second acrylic plate 42 to reciprocate. During the reciprocating movement of the second acrylic plate 42, the friction layer rubs against the surface of the conductive layer, thereby realizing power generation.

[0048] The independent layer mode is a fundamental operating mode of a triboelectric nanogenerator. In this mode, a moving object in the air acquires a charge due to contact with another object. This charge can remain on the surface for an extended period of time. During this period, the charge density reaches saturation, eliminating the need for direct mechanical contact. This operating mode can be applied to devices with various structures, such as sliding, contact, grating, and rotating disk. The use of a grating structure in this embodiment significantly increases the amount of collected charge, current density, and output frequency.

[0049] In this embodiment, the piezoelectric sheet is an MFC (Macro Fiber Composite) piezoelectric sheet, which is a durable new material that can help improve the durability of the device and extend the service life of the device.

[0050] In this embodiment, the number of piezoelectric sheets is the same as the number of vibration column assemblies, and there are also five piezoelectric sheets, including a first piezoelectric sheet 1, a second piezoelectric sheet 2, a third piezoelectric sheet 3, a fourth piezoelectric sheet 4 and a fifth piezoelectric sheet 5, and the first piezoelectric sheet 1, the second piezoelectric sheet 2, the third piezoelectric sheet 3, the fourth piezoelectric sheet 4 and the fifth piezoelectric sheet 5 are respectively connected to a vibration column assembly through a first I-type cantilever beam 7, a second I-type cantilever beam 8, a third I-type cantilever beam 9, a fourth I-type cantilever beam 33 and a fifth I-type cantilever beam 34; wherein, one end of the I-type cantilever beam is glued to the side support plate 6 and connected to the corresponding piezoelectric sheet, and the other end is glued to the corresponding vibration column assembly; further, the I-type cantilever beam is waterproofed, such as coated with a waterproof coating or provided with a waterproof sleeve.

[0051] In this embodiment, if Figure 5-Figure 6 As shown, the surface of the vibration column is evenly arrayed with multiple super surface patterns, which can improve the aerodynamic characteristics and enhance vortex-induced vibration on the basis of decorating the vibration column; wherein, the shape of the super surface pattern can be selected according to specific work needs, such as rhombus, regular pentagon, regular hexagon, hourglass, trapezoid, five-pointed star, hexagon, fan-shaped, etc.

[0052] The working principle of the piezoelectric-triboelectric energy harvester in this embodiment is as follows:

[0053] This embodiment utilizes the combined effects of vortex-induced vibration and magneto-induced vibration. During operation, the transverse repulsion and longitudinal adsorption magnetic piezoelectric energy harvester structure reduces the device's natural frequency, making it easier to initiate vibration at lower flow rates. Water flowing through the cylinder induces lateral motion. This reciprocating motion exerts a force on the I-shaped cantilever beam, causing it to elastically deform, which in turn drives the deformation of the macroscopic fiber composite material (MFC) piezoelectric sheet, ultimately converting mechanical energy into electrical energy.

[0054] The working principle of vortex-induced vibration is that when water flows through the double cylinders, the viscosity of the fluid causes it to produce alternating vortices on the rear side of the cylinders, thereby further inducing the double cylinders to produce lateral reciprocating motion.

[0055] The working principle of the transverse repulsion and longitudinal attraction magneto-induced vibration is that the transverse magnets repel each other and the longitudinal magnets attract each other, which greatly reduces the natural frequency of the device, making it easier to vibrate at lower flow rates, and the flow rate range required to achieve vortex-induced resonance is lower.

[0056] In this embodiment, the piezoelectric-triboelectric energy harvester can be used to collect and convert the vibration energy of water flow into electrical energy. This energy is widely present in nature and has broad prospects. In addition, the piezoelectric-triboelectric energy harvester in this embodiment has a variety of usage environments and can also collect and convert the vibration energy contained in air flow, wave fluctuations, etc. into electrical energy.

[0057] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

[0058] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A piezoelectric-triboelectric energy harvester, characterized in that: include: A vortex-induced vibration module, comprising a vibration column assembly capable of generating motion under the action of a fluid; A piezoelectric module, comprising a piezoelectric sheet mounted on a support member and connected to the vibration column assembly via a connector. When the vibration column assembly moves, the connector can drive the piezoelectric sheet to deform, thereby generating electricity. a triboelectric module, the triboelectric module being mounted on the vibrating column assembly and capable of generating electricity by friction when the vibrating column assembly moves; a magnetically induced vibration module, the magnetically induced vibration module comprising a correspondingly arranged moving magnet and a fixed magnet, the moving magnet being installed in the vibration column assembly and being capable of moving with the vibration column assembly to cause the vibration column assembly to generate magnetically induced vibration; The vibration column assembly includes two vibration columns connected in sequence from bottom to top, each of the vibration columns is provided with a plurality of moving magnets, and the moving magnets include moving magnets arranged in the transverse direction and moving magnets arranged in the longitudinal direction; Each of the vibration columns is provided with two moving magnets arranged in the transverse direction and one moving magnet arranged in the longitudinal direction, and three fixed magnets are provided, including a first fixed magnet, a second fixed magnet, and a third fixed magnet; wherein the first fixed magnet and the third fixed magnet are parallel to the moving magnet arranged in the transverse direction, and the second fixed magnet is parallel to the moving magnet arranged in the longitudinal direction, and all the vibration column assemblies are located between the first fixed magnet and the second fixed magnet, and the moving magnet arranged in the longitudinal direction is located on the side of the vibration column close to the second fixed magnet; The moving magnet and the adjacent fixed magnet arranged in the transverse direction repel each other, and the moving magnet and the second fixed magnet arranged in the longitudinal direction attract each other.

2. The piezoelectric-triboelectric energy harvester according to claim 1, characterized in that: The piezoelectric-triboelectric energy harvester also includes a bottom support plate, the vibration column assembly is perpendicular to the bottom support plate, the fixed magnet is vertically arranged on the bottom support plate, and the support member is a side support plate, which is vertically connected to the bottom support plate.

3. The piezoelectric-triboelectric energy harvester according to claim 1 or 2, characterized in that: The bottom of the lower vibration column and the top of the upper vibration column are both connected to the triboelectric module.

4. The piezoelectric-triboelectric energy harvester according to claim 3, characterized in that: The vibration column assemblies are arranged in multiple rows along the fluid flow direction, the vibration column assemblies in each row are staggered, and the diameters of the vibration column assemblies in each row are different.

5. The piezoelectric-triboelectric energy harvester according to claim 4, characterized in that: The vibration column assemblies are arranged in three rows, with two vibration column assemblies in the first row and two vibration column assemblies in the second row, and one vibration column assembly in the second row. All the vibration column assemblies are arranged in an X shape.

6. The piezoelectric-triboelectric energy harvester according to claim 1, characterized in that: The triboelectric module includes a waterproof box and a nano-triboelectric power generation unit in an independent layer mode, and the nano-triboelectric power generation unit is arranged in the waterproof box.

7. The piezoelectric-triboelectric energy harvester according to claim 1, characterized in that: The piezoelectric sheet is an MFC piezoelectric sheet.

8. The piezoelectric-triboelectric energy harvester according to claim 3, characterized in that: The vibration column is a cylinder, and a plurality of super surface patterns are provided on the surface of the vibration column.

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