Multilayer board piezoelectric energy harvesting structure based on acoustic black hole

Abstract

The invention discloses a multilayer board piezoelectric energy harvesting structure based on an acoustic black hole, and relates to the technical field of piezoelectric energy harvesting, the multilayer board piezoelectric energy harvesting structure comprises a piezoelectric energy harvesting mechanism, and the piezoelectric energy harvesting mechanism comprises a base. A movable plate rotates to drive a connecting plate to rotate, the connecting plate is rotated to the right side of a positioning seat, then a rotating disc is held to rotate, a connecting shaft is driven to rotate through rotation of the rotating disc, a gear is driven to rotate through rotation of the connecting shaft, and a moving plate is driven to move through rotation of the gear; a movable plate moves to drive a connecting plate to move, when the connecting plate is adjusted to a proper position, a movable plate can be held to rotate until an inserting plate is inserted into an inserting groove, the position of a sealing cover is fixed, and then a transduction plate in a gathering plate can be conveniently maintained and replaced.

Description

Technical Field

[0001] The present invention relates to the technical field of piezoelectric energy harvesting, and in particular to a multi-layer plate piezoelectric energy harvesting structure based on an acoustic black hole. Background Art

[0002] Piezoelectric energy harvesting is a technology that uses the piezoelectric effect of piezoelectric materials to convert vibration energy in the environment into electrical energy. Piezoelectric materials will generate electric charges when subjected to external forces, thereby converting mechanical energy into electrical energy. In the acoustic black hole structure, through specific design, the sound waves gradually gather and enhance as they propagate inside the structure. This structure has a significant energy gathering effect in a high-frequency vibration environment, providing ideal conditions for piezoelectric energy harvesting.

[0003] However, in order to maintain its sealing during use, the existing piezoelectric energy harvesting structure usually adopts a fixed integrated structure. This results in a long time spent on maintenance and replacement of the internal transducer plate, and the subsequent reinstallation is also very time-consuming, which greatly reduces the efficiency of the use of the piezoelectric energy harvesting structure.

[0004] To this end, we propose a multi-layer piezoelectric energy-harvesting structure based on acoustic black holes. Summary of the invention

[0005] The object of the present invention is to provide a multi-layer plate piezoelectric energy harvesting structure based on an acoustic black hole to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-layer plate piezoelectric energy harvesting structure based on an acoustic black hole, comprising a piezoelectric energy harvesting mechanism, wherein the piezoelectric energy harvesting mechanism comprises a base, a collecting plate is fixedly connected to the top of the base, and a sealing cover is movably connected to the front and back sides of the collecting plate;

[0007] A fixing mechanism is installed on the surface of the sealing cover, and the fixing mechanism includes a fixing seat, a positioning seat, a connecting plate for fixing the position of the sealing cover, and an adjusting plate for adjusting the position of the connecting plate;

[0008] The inner cavity of the sealing cover is equipped with a reflection mechanism, which includes a first reflection plate and a second reflection plate for improving the sound source reflection effect.

[0009] Preferably, the back side of the fixed seat is fixedly connected to the front side of the sealing cover, the front side of the positioning seat is fixedly connected to the back side of the sealing cover, the inner cavity of the positioning seat is provided with a plug-in slot, the inner cavity of the fixed seat is fixedly connected to a support shaft, the surface of the support shaft is movably connected to a movable plate, the top and bottom of the movable plate are movably connected to positioning rings, the inner cavity of the positioning ring is fixedly connected to the surface of the support shaft, the back side of the movable plate is movably connected to the front side of the adjustment plate, the back side of the adjustment plate is movably connected to the front side of the connecting plate, the inner side of the connecting plate is fixedly connected to a plug-in plate, and the surface of the plug-in plate is plugged into the inner cavity of the plug-in slot.

[0010] Preferably, the inner cavity of the plug-in slot is fixedly connected to a fixing rod, the inner cavity of the plug-in plate is fixedly connected to a supporting plate, the inner cavity of the supporting plate is provided with a movable groove, the inner cavity of the movable groove is fixedly connected to a supporting rod, the surface of the supporting rod is movably connected to a fixing ring, there are two fixing rings, and the inner cavity of the fixing ring is clamped with the surface of the fixing rod.

[0011] Preferably, a spring is fixedly connected to one side of the surface of the fixing ring, the springs are multiple in number and arranged in multiple rows, and one end of the spring is fixedly connected to the inner cavity of the plug board.

[0012] Preferably, the right side of the adjustment plate is movably connected to a turntable, the left side of the turntable is fixedly connected to a connecting shaft, the surface of the connecting shaft is fixedly connected to a gear, the top of the gear surface is meshingly connected to a movable plate, and the back side of the movable plate is fixedly connected to the front side of the connecting plate.

[0013] Preferably, a moving groove is provided in the inner cavity of the moving plate, a moving rod is movably connected to the inner cavity of the moving groove, and the front side of the moving rod is fixedly connected to the front side of the inner cavity of the adjustment plate.

[0014] Preferably, a limiting groove is provided on the back side of the inner cavity of the movable groove, the inner cavity of the limiting groove is movably connected to a limiting ring, and the inner cavity of the limiting ring is fixedly connected to the surface of the movable rod.

[0015] Preferably, one side of the first reflective plate is fixedly connected to the surface of the sealing cover, the inner cavity of the first reflective plate is provided with a docking groove, the surface of the second reflective plate is fixedly connected to the inner cavity of the sealing cover, the inner cavity of the second reflective plate is provided with a fixing groove, the back side of the first reflective plate is fixedly connected with a fixing plate, and the surface of the fixing plate is plugged into the inner cavity of the fixing groove.

[0016] Preferably, a transducer mechanism is installed in the inner cavity of the focusing plate, and the transducer mechanism includes a transducer plate and a guide groove. The surface of the transducer plate is movably connected to the inner cavity of the focusing plate, and the guide groove is opened in the inner cavity of the focusing plate. A scatterer and a piezoelectric sheet are respectively fixedly connected to the top of the transducer plate. The scatterers are multiple and arranged in multiple rows and columns, and a groove is opened in the inner cavity of the transducer plate.

[0017] Preferably, the inner cavity of the guide groove is movably connected with a guide plate, and one side of the guide plate is fixedly connected to the surface of the transducer plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention sets a fixing mechanism, and by holding the movable plate to rotate, the connection plate is driven to rotate by the rotation of the movable plate, and the connection plate is rotated to the right side of the positioning seat, and then the turntable is held to rotate, and the connection shaft is driven to rotate by the rotation of the turntable, and the gear is driven to rotate by the rotation of the connecting shaft, and the movable plate is driven to move by the rotation of the gear, and the connection plate is driven to move by the movement of the movable plate. When the connection plate is adjusted to a suitable position, the movable plate can be held to rotate until the plug-in plate is plugged into the inside of the plug-in slot to fix the position of the sealing cover, thereby facilitating the maintenance and replacement of the transducer plate inside the gathering plate.

[0020] 2. The present invention sets a reflection mechanism and pushes the sealing cover to move inward and close. The movement of the sealing cover drives the first reflection plate to move. When the sealing cover is closed on the surface of the collecting plate, the first reflection plate can prevent the sound waves entering the collecting plate from being reflected to the outside and lost. At the same time, the second reflection plate is set to improve the reflection effect of the sound waves inside the collecting plate, thereby reducing the energy loss of the sound waves during the propagation process.

[0021] 3. The present invention further diffuses the sound waves gathered by the focusing plate through the scatterer by setting a transducer mechanism, thereby driving the transducer plate to vibrate through the sound waves. The mechanical energy generated by the vibration of the transducer plate can be converted into electrical energy for recovery through the piezoelectric sheet during the vibration of the transducer plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 A bottom view of the collecting plate of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the movable plate of the present invention;

[0025] Figure 4 is a cross-sectional view of the adjustment plate of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the connecting plate of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the plug board of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the sealing cover of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the gathering plate of the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the guide groove of the present invention;

[0031] Fig.10 It is a schematic structural diagram of the transducer plate of the present invention.

[0032] In the figure: 1, piezoelectric energy capture mechanism; 101, base; 102, sealing cover; 103, gathering plate; 2, fixing mechanism; 201, movable plate; 202, fixing seat; 203, positioning ring; 204, supporting shaft; 205, adjusting plate; 206, positioning seat; 207, connecting plate; 208, rotating disk; 209, gear; 210, limiting groove; 211, moving rod; 212, moving groove; 213, connecting shaft; 214, moving plate; 215, limiting ring; 216, Support plate; 217, movable groove; 218, fixed rod; 219, plug-in slot; 220, plug-in plate; 221, spring; 222, fixed ring; 223, support rod; 3, reflection mechanism; 301, first reflection plate; 302, docking groove; 303, fixed plate; 304, fixed groove; 305, second reflection plate; 4, transducer mechanism; 401, transducer plate; 402, guide groove; 403, groove; 404, scatterer; 405, piezoelectric sheet; 406, guide plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0034] Embodiment 1

[0035] See also Figure 1-6The present invention provides a technical solution: a multi-layer piezoelectric energy harvesting structure based on an acoustic black hole. The present invention makes corresponding improvements to the technical problems mentioned in the background technology, including a piezoelectric energy harvesting mechanism 1, the piezoelectric energy harvesting mechanism 1 includes a base 101, a collecting plate 103 is fixedly connected to the top of the base 101, and a sealing cover 102 is movably connected to the front and back sides of the collecting plate 103;

[0036] A fixing mechanism 2 is installed on the surface of the sealing cover 102 . The fixing mechanism 2 includes a fixing seat 202 , a positioning seat 206 , a connecting plate 207 for fixing the position of the sealing cover 102 , and an adjusting plate 205 for adjusting the position of the connecting plate 207 .

[0037] See also Figure 2 , Figure 3 and Figure 5 The back side of the fixed seat 202 is fixedly connected to the front side of the sealing cover 102, the front side of the positioning seat 206 is fixedly connected to the back side of the sealing cover 102, the inner cavity of the positioning seat 206 is provided with a plug-in slot 219, the inner cavity of the fixed seat 202 is fixedly connected to the support shaft 204, the surface of the support shaft 204 is movably connected to the movable plate 201, the top and bottom of the movable plate 201 are movably connected to the positioning ring 203, the inner cavity of the positioning ring 203 is fixedly connected to the surface of the support shaft 204, the back side of the movable plate 201 is movably connected to the front side of the adjusting plate 205, and the back side of the adjusting plate 205 is connected to the connecting The front side of the connecting plate 207 is movably connected, and the inner side of the connecting plate 207 is fixedly connected with a plug-in plate 220, and the surface of the plug-in plate 220 is plugged into the inner cavity of the plug-in slot 219. The position of the movable plate 201 is supported by the setting of the support shaft 204, so that the movable plate 201 can rotate on its surface, and then the position of the connecting plate 207 can be adjusted during the rotation of the movable plate 201, so that the connecting plate 207 can fix the position of the sealing cover 102, and the position of the connecting plate 207 can be recovered when not in use to prevent it from blocking the operation of other components.

[0038] See also Figure 5 and Figure 6 The inner cavity of the plug-in slot 219 is fixedly connected with a fixing rod 218, the inner cavity of the plug-in board 220 is fixedly connected with a support plate 216, the inner cavity of the support plate 216 is provided with a movable groove 217, the inner cavity of the movable groove 217 is fixedly connected with a support rod 223, and the surface of the support rod 223 is movably connected with a fixing ring 222. There are two fixing rings 222, and the inner cavity of the fixing ring 222 is snap-fitted with the surface of the fixing rod 218. By setting the support rod 223, the fixing ring 222 can rotate on its surface, and the fixing ring 222 is snap-fitted and fixed to the surface of the fixing rod 218, which can improve the fixing effect between the plug-in board 220 and the plug-in slot 219, thereby further improving the fixing stability of the sealing cover 102 when it is closed.

[0039] See also Figure 6 A spring 221 is fixedly connected to one side of the surface of the fixing ring 222. The number of springs 221 is multiple and they are arranged in multiple rows. One end of the spring 221 is fixedly connected to the inner cavity of the plug board 220. Through the arrangement of the spring 221, the surface of the fixing ring 222 is supported. When the fixing ring 222 is subjected to force, the spring 221 will be pushed to deform. When the fixing ring 222 is not subjected to force, the spring 221 can restore the deformation and drive the fixing ring 222 to quickly reset, and can also improve the fixing effect of the fixing rod 218.

[0040] See also Figure 3 and Figure 4 The right side of the adjustment plate 205 is movably connected with a turntable 208, and the left side of the turntable 208 is fixedly connected with a connecting shaft 213. The surface of the connecting shaft 213 is fixedly connected with a gear 209, and the top of the surface of the gear 209 is meshingly connected with a moving plate 214. The back side of the moving plate 214 is fixedly connected to the front side of the connecting plate 207. Through the setting of the turntable 208, the gear 209 can be driven to rotate, and the rotation of the gear 209 can drive the moving plate 214 to move, so that the movement of the moving plate 214 can drive the connecting plate 207 to move, and then the position of the connecting plate 207 can be adjusted according to needs.

[0041] See also Figure 4 The inner cavity of the movable plate 214 is provided with a movable groove 212, and the inner cavity of the movable groove 212 is movably connected with a movable rod 211, and the front side of the movable rod 211 is fixedly connected to the front side of the inner cavity of the adjustment plate 205. Through the setting of the movable groove 212, the movement of the movable plate 214 is guided, the stability of the movable plate 214 during movement is improved, and the position of the movable plate 214 is prevented from being offset during the movement process.

[0042] See also Figure 4 A limiting groove 210 is provided on the back side of the inner cavity of the movable groove 212, and the inner cavity of the limiting groove 210 is movably connected to a limiting ring 215, and the inner cavity of the limiting ring 215 is fixedly connected to the surface of the movable rod 211. Through the setting of the limiting groove 210, the limiting ring 215 can move inside the movable plate 214, thereby limiting the movement of the movable plate 214 during the movement of the limiting ring 215, thereby preventing the movable plate 214 from detaching from the surface of the movable groove 212 during the movement.

[0043] The specific implementation of this embodiment is as follows: by holding the movable plate 201 to rotate, the rotation of the movable plate 201 drives the connecting plate 207 to rotate, and the connecting plate 207 is rotated to the right side of the positioning seat 206, and then by holding the rotating disk 208 to rotate, the rotation of the rotating disk 208 drives the connecting shaft 213 to rotate, and the rotation of the connecting shaft 213 drives the gear 209 to rotate, and the rotation of the gear 209 drives the movable plate 214 to move, and the movement of the movable plate 214 drives the connecting plate 207 to move, so as to adjust the position of the connecting plate 207. When 7 is adjusted to the appropriate position, you can hold the movable plate 201 and rotate it until the plug-in plate 220 is plugged into the inside of the plug-in slot 219. At the same time, after the plug-in plate 220 is plugged into the inside of the plug-in slot 219, the fixing ring 222 on the surface of the support rod 223 will be squeezed by the surface of the fixing rod 218 and rotated outward during the movement. When the fixing rod 218 enters the inner side of the fixing ring 222, the spring 221 will push the fixing ring 222 to rotate and reset during the process of recovering its deformation until the surface of the fixing rod 218 is clamped, so that the sealing cover 102 can be stably fixed on the surface of the gathering plate 103.

[0044] Embodiment 2

[0045] See also Figure 1-7 The present invention provides a technical solution: a multi-layer plate piezoelectric energy harvesting structure based on an acoustic black hole. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. A reflection mechanism 3 is installed in the inner cavity of the sealing cover 102. The reflection mechanism 3 includes a first reflection plate 301 and a second reflection plate 305 for improving the sound source reflection effect.

[0046] See also Figure 2 and Figure 7 One side of the first reflecting plate 301 is fixedly connected to the surface of the sealing cover 102, and the inner cavity of the first reflecting plate 301 is provided with a docking groove 302. The surface of the second reflecting plate 305 is fixedly connected to the inner cavity of the sealing cover 102, and the inner cavity of the second reflecting plate 305 is provided with a fixing groove 304. The back side of the first reflecting plate 301 is fixedly connected with a fixing plate 303, and the surface of the fixing plate 303 is plugged into the inner cavity of the fixing groove 304. Through the setting of the first reflecting plate 301, the sound waves entering the interior of the collecting plate 103 can be blocked to prevent these sound waves from rebounding. At the same time, through the setting of the fixing groove 304, when the surface of the fixing plate 303 is plugged into the interior, the position of the first reflecting plate 301 can be fixed, so that it can be stably attached to the entrance of the collecting plate 103. Moreover, since the first reflecting plate 301 and the second reflecting plate 305 are both made of hard plastic, after the sound waves enter the interior of the collecting plate 103, their reflection effect can be improved, thereby reducing the energy loss of the sound waves during the propagation process.

[0047] The specific implementation method of this embodiment is: by pushing the sealing cover 102 to move inward and close, the movement of the sealing cover 102 drives the first reflecting plate 301 to move, and the movement of the first reflecting plate 301 drives the fixing plate 303 to move. When the sealing cover 102 is closed on the surface of the collecting plate 103, the surface of the fixing plate 303 will be inserted into the interior of the fixing groove 304, so that the position of the first reflecting plate 301 can be fixed, so that it can prevent the sound waves entering the collecting plate 103 from being reflected to the outside and lost. At the same time, through the setting of the second reflecting plate 305, the reflection effect of the sound waves inside the collecting plate 103 is improved, thereby reducing the energy loss of the sound waves during the propagation process.

[0048] Embodiment 3

[0049] See also Figure 1-10 The present invention provides a technical solution: a multi-layer plate piezoelectric energy capture structure based on an acoustic black hole. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. A transducer mechanism 4 is installed in the inner cavity of the focusing plate 103. The transducer mechanism 4 includes a transducer plate 401 and a guide groove 402. The surface of the transducer plate 401 is movably connected to the inner cavity of the focusing plate 103. The guide groove 402 is opened in the inner cavity of the focusing plate 103. A scatterer 404 and a piezoelectric sheet 405 are fixedly connected to the top of the transducer plate 401 respectively. The number of scatterers 404 is multiple and they are arranged in multiple rows and columns. A groove 403 is opened in the inner cavity of the transducer plate 401.

[0050] See also Fig. 9 and Fig.10 The inner cavity of the guide groove 402 is movably connected with a guide plate 406, and one side of the guide plate 406 is fixedly connected to the surface of the transducer plate 401. The setting of the guide groove 402 guides the movement of the guide plate 406, so that the transducer plate 401 is more stable when entering and exiting the interior of the focusing plate 103 through the setting of the guide plate 406, thereby preventing the transducer plate 401 from shifting during the movement.

[0051] The specific implementation of this embodiment is as follows: the sound waves gathered by the focusing plate 103 are further diffused through the scatterer 404, so that the transducer plate 401 is driven to vibrate by the sound waves, that is, during the vibration of the transducer plate 401, the mechanical energy generated by the vibration of the transducer plate 401 is converted into electrical energy for recovery through the piezoelectric sheet 405. When the transducer plate 401 needs to be maintained or replaced, the transducer plate 401 is pushed to move, and the movement of the transducer plate 401 drives the guide plate 406 to move. During the movement of the guide plate 406, it moves inside the guide groove 402, and the movement of the guide plate 406 is guided by the guide groove 402, so that the stability of the transducer plate 401 when entering and exiting the focusing plate 103 can be improved, thereby facilitating the installation and removal of the transducer plate 401.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-layer piezoelectric energy harvesting structure based on an acoustic black hole, comprising a piezoelectric energy harvesting mechanism (1), characterized in that: The piezoelectric energy capture mechanism (1) comprises a base (101), the top of the base (101) is fixedly connected to a gathering plate (103), and the front side and the back side of the gathering plate (103) are movably connected to a sealing cover (102); A fixing mechanism (2) is installed on the surface of the sealing cover (102), and the fixing mechanism (2) comprises a fixing seat (202), a positioning seat (206), a connecting plate (207) for fixing the position of the sealing cover (102), and an adjusting plate (205) for adjusting the position of the connecting plate (207); A reflection mechanism (3) is installed in the inner cavity of the sealing cover (102), and the reflection mechanism (3) comprises a first reflection plate (301) and a second reflection plate (305) for improving the sound source reflection effect.

2. The multi-layer piezoelectric energy harvesting structure based on acoustic black hole according to claim 1, characterized in that: The back side of the fixed seat (202) is fixedly connected to the front side of the sealing cover (102), the front side of the positioning seat (206) is fixedly connected to the back side of the sealing cover (102), the inner cavity of the positioning seat (206) is provided with a plug-in slot (219), the inner cavity of the fixed seat (202) is fixedly connected to a support shaft (204), the surface of the support shaft (204) is movably connected to a movable plate (201), and the top and bottom of the movable plate (201) are both movably connected. The movable plate (201) is movably connected to a positioning ring (203), the inner cavity of the positioning ring (203) is fixedly connected to the surface of the support shaft (204), the back side of the movable plate (201) is movably connected to the front side of the adjustment plate (205), the back side of the adjustment plate (205) is movably connected to the front side of the connecting plate (207), the inner side of the connecting plate (207) is fixedly connected to a plug-in board (220), and the surface of the plug-in board (220) is plugged into the inner cavity of the plug-in slot (219).

3. The multi-layer piezoelectric energy harvesting structure based on acoustic black hole according to claim 2, characterized in that: The inner cavity of the plug-in slot (219) is fixedly connected to a fixing rod (218), the inner cavity of the plug-in board (220) is fixedly connected to a supporting plate (216), the inner cavity of the supporting plate (216) is provided with a movable groove (217), the inner cavity of the movable groove (217) is fixedly connected to a supporting rod (223), the surface of the supporting rod (223) is movably connected to a fixing ring (222), the number of the fixing rings (222) is two, and the inner cavity of the fixing ring (222) is snap-fitted to the surface of the fixing rod (218).

4. The multi-layer piezoelectric energy harvesting structure based on acoustic black hole according to claim 3, characterized in that: A spring (221) is fixedly connected to one side of the surface of the fixing ring (222), the springs (221) are multiple in number and arranged in multiple rows, and one end of the spring (221) is fixedly connected to the inner cavity of the plug board (220).

5. The multi-layer piezoelectric energy harvesting structure based on acoustic black hole according to claim 1, characterized in that: The right side of the adjustment plate (205) is movably connected to a turntable (208), the left side of the turntable (208) is fixedly connected to a connecting shaft (213), the surface of the connecting shaft (213) is fixedly connected to a gear (209), the top of the surface of the gear (209) is meshingly connected to a moving plate (214), and the back side of the moving plate (214) is fixedly connected to the front side of the connecting plate (207).

6. The multi-layer piezoelectric energy harvesting structure based on acoustic black hole according to claim 5, characterized in that: The inner cavity of the movable plate (214) is provided with a movable groove (212), the inner cavity of the movable groove (212) is movably connected to a movable rod (211), and the front side of the movable rod (211) is fixedly connected to the front side of the inner cavity of the adjustment plate (205).

7. The multi-layer piezoelectric energy harvesting structure based on acoustic black hole according to claim 6, characterized in that: A limiting groove (210) is provided on the back side of the inner cavity of the movable groove (212); the inner cavity of the limiting groove (210) is movably connected to a limiting ring (215); and the inner cavity of the limiting ring (215) is fixedly connected to the surface of the movable rod (211).

8. The multi-layer piezoelectric energy harvesting structure based on acoustic black hole according to claim 1, characterized in that: One side of the first reflecting plate (301) is fixedly connected to the surface of the sealing cover (102), the inner cavity of the first reflecting plate (301) is provided with a docking groove (302), the surface of the second reflecting plate (305) is fixedly connected to the inner cavity of the sealing cover (102), the inner cavity of the second reflecting plate (305) is provided with a fixing groove (304), the back side of the first reflecting plate (301) is fixedly connected to a fixing plate (303), and the surface of the fixing plate (303) is plugged into the inner cavity of the fixing groove (304).

9. The multi-layer piezoelectric energy harvesting structure based on acoustic black hole according to claim 1, characterized in that: The inner cavity of the collecting plate (103) is installed with a transducer mechanism (4), and the transducer mechanism (4) comprises a transducer plate (401) and a guide groove (402). The surface of the transducer plate (401) is movably connected to the inner cavity of the collecting plate (103), and the guide groove (402) is opened in the inner cavity of the collecting plate (103). The top of the transducer plate (401) is respectively fixedly connected with a scatterer (404) and a piezoelectric plate (405). The number of the scatterers (404) is multiple and they are arranged in multiple rows and columns. The inner cavity of the transducer plate (401) is opened with a groove (403).

10. The multi-layer piezoelectric energy harvesting structure based on acoustic black hole according to claim 9, characterized in that: The inner cavity of the guide groove (402) is movably connected to a guide plate (406), and one side of the guide plate (406) is fixedly connected to the surface of the transducer plate (401).

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