Piezoelectric energy collection device based on suspension support

Abstract

The invention relates to the technical field of energy collection, and particularly discloses a piezoelectric type energy collection device based on a suspension support, which comprises a base and a cantilever beam, a bottom piezoelectric beam is arranged in the middle of the top of the base, and supporting seats are arranged at the top of the base on two opposite sides of the bottom piezoelectric beam through mounting seats; two side piezoelectric beams are arranged on the side, away from the mounting base, of the supporting base, a cantilever beam is arranged between the two side piezoelectric beams above the bottom piezoelectric beam, the side piezoelectric beams are connected with one end of a swing arm through a connecting base, the other end of the swing arm is connected with the lower end of the cantilever beam, and the cantilever beam comprises a first cantilever rod and a second cantilever rod. The first cantilever rod is connected with the adjusting mechanism through the connecting mechanism. A series of structures are arranged, the height and angle of the mass block are adaptive to vibration excitation devices at different positions, the direction of the bluff body is adjusted to be adaptive to the wind direction, and the excitation wind speed of bluff body wind is controllably increased.

Description

Technical Field

[0001] This invention relates to the field of energy harvesting technology, specifically to a piezoelectric energy harvesting device based on a suspension support. Background Technology

[0002] Currently, piezoelectric energy harvesting technology is rapidly developing. Converting environmental energy sources such as vibrational energy, tidal energy, and wind energy into electrical energy to provide a continuous power source for microelectromechanical systems (MEMS) has become a research hotspot. A typical cantilever beam-based piezoelectric energy harvesting device mainly consists of an elastic base beam and piezoelectric material layers. Generally, the piezoelectric material is adhered to the root of the elastic cantilever beam, and the bending deformation generated by the direct forced vibration of the piezoelectric unit converts mechanical energy into electrical energy. Based on the number and connection method of the piezoelectric layers, it can be classified into piezoelectric single crystals, series-connected piezoelectric twin crystals, and parallel-connected piezoelectric twin crystals.

[0003] Currently, the height and angle of the free-end attachments mounted on the cantilever beam in energy harvesting devices are limited. The bluff body wind excitation exhibits variable wind direction and speed, and small wind direction deviations and speeds result in small vibration amplitudes due to the bluff body wind excitation. Furthermore, the root of the cantilever beam in these devices is a fixed support, making it difficult to generate large-amplitude vibrations under weak excitation. Additionally, the piezoelectric material is bonded to the root of the cantilever beam, utilizing its bending deformation to convert energy, resulting in a single operating mode. Therefore, current cantilever beam-based energy harvesting devices suffer from problems such as small vibration amplitudes under weak excitation, low energy conversion efficiency, low output power, and a single operating mode. Summary of the Invention

[0004] The purpose of this invention is to provide a piezoelectric energy harvesting device based on a suspension support to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a piezoelectric energy harvesting device based on a suspended support, comprising a base and a cantilever beam. A bottom piezoelectric beam is provided in the middle of the top of the base. Supports are provided on the top of the base on both sides of the bottom piezoelectric beam via mounting seats. Two side piezoelectric beams are provided on the side of the support seat away from the mounting seats. A cantilever beam is provided between the two side piezoelectric beams above the bottom piezoelectric beam. The side piezoelectric beams are connected to one end of a swing arm via connecting seats. The other end of the swing arm is connected to the lower end of the cantilever beam. The cantilever beam includes a first... The system includes a first cantilever and a second cantilever. The first cantilever is connected to an adjustment mechanism via a connecting mechanism. The adjustment mechanism is connected to the second cantilever. The top of the second cantilever has a rotating mechanism. The top of the rotating mechanism has a free end attachment via a support rod. The free end attachment includes a blunt body and a mass block. A support plate is provided on the support rod between the rotating mechanism and the blunt body via an adjuster. A wind guide mechanism is provided on the support plate via a moving mechanism. The wind guide mechanism is located at the windward end of the blunt body. A wind direction sensor is provided on the top of the wind guide mechanism. A wind speed sensor is provided on the top of the support plate on one side of the blunt body.

[0006] Preferably, the connecting mechanism includes a lifting frame, a first sliding groove, a first lead screw, and a first motor. A first sliding groove is provided on one side of the first cantilever rod, and a first lead screw and a threaded sleeve are provided inside the first sliding groove. The lifting frame is slidably mounted on the first cantilever rod and is connected to the threaded sleeve. The bottom of the first lead screw is connected to the output end of the first motor on the first cantilever rod through a coupling. An adjustment mechanism is provided on one side of the lifting frame, and the lifting frame is connected to the second cantilever rod through the adjustment mechanism.

[0007] Preferably, the adjustment mechanism includes an adjustment seat, an adjustment shaft, a first worm gear, a first worm, and a second motor. The lifting frame on one side of the first cantilever is arranged in a U-shaped frame structure. The first worm gear and the first worm are provided on one side of the lifting frame via the adjustment seat. The first worm gear and the first worm are meshed with each other. Adjustment shafts are provided on both opposite sides of the lower end of the second cantilever. The second cantilever is connected to the lifting frame via the adjustment shafts. The adjustment shaft on one side of the second cantilever is connected to the first worm gear. The second motor is provided on one side of the adjustment seat via a motor mount. The output end of the second motor is connected to one end of the first worm via a coupling.

[0008] Preferably, the rotating mechanism includes a rotating seat, a rotating shaft, a second worm gear, a second worm, and a third motor. The rotating seat is located at the top of the second cantilever rod, and the rotating shaft is located at the bottom of the support rod. The rotating seat contains a second worm gear and a second worm that mesh with each other. The bottom of the rotating shaft is connected to the second worm gear. A third motor is located on one side of the rotating seat via a motor mount. The output end of the third motor is connected to one end of the second worm via a coupling. The input end of the third motor is electrically connected to the output end of the wind direction sensor via a control module.

[0009] Preferably, the moving mechanism includes a second sliding groove, a second lead screw, a moving frame, and a fourth motor. The second sliding groove is provided on the support plate, and the second lead screw and a threaded block are provided inside the second sliding groove. The threaded block is connected to the second lead screw. The moving frame is slidably provided on the support plate and is connected to the threaded block. One end of the second lead screw is connected to the output end of the fourth motor through a coupling. The output end of the wind speed sensor is electrically connected to the input end of the fourth motor through a control module.

[0010] Preferably, the air guiding mechanism includes a wind-facing plate, an air guide port, and a centralized air guide plate. The top of the movable frame is provided with a wind-facing plate, the wind-facing plate is provided with an air guide port, and the interior of the air guide port is provided with a centralized air guide plate.

[0011] Preferably, the size of the air guide is larger than the area of ​​the windward surface of the blunt body.

[0012] Preferably, the top of the base is provided with a mounting hole, and the mounting base is fixedly installed to the base by bolts in the mounting hole.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. This piezoelectric energy harvesting device based on a suspended support achieves two modes of piezoelectric energy harvesting through a cantilever beam, swing arm, free end attachment, side piezoelectric beam, and bottom piezoelectric beam. The cantilever beam consists of a first cantilever rod and a second cantilever rod. The height of the cantilever beam is adjustable, and the angle of the second cantilever rod is adjustable through an adjustment mechanism. This allows for the adjustment of the height and angle of the free end attachment for piezoelectric energy harvesting. The device can also adapt to vibration excitation devices installed at different positions by adjusting the height and angle of the mass block on the cantilever beam.

[0015] 2. This piezoelectric energy harvesting device based on a suspended support uses a rotating mechanism on the cantilever beam. The No. 2 worm gear, the No. 2 worm, and the rotating shaft work together with a wind direction sensor to monitor the wind excitation direction of the bluff body in real time. The bluff body installed on the cantilever beam can adjust its direction according to the wind direction monitored by the wind direction sensor through the rotating mechanism, so that the bluff body on the cantilever beam can adapt to the wind direction.

[0016] 3. This piezoelectric energy harvesting device based on a suspended support uses a wind-guiding mechanism installed on the windward end of a bluff body. A windward plate is installed in front of the windward end of the bluff body, and a concentrated wind-guiding plate is installed inside the wind-guiding port of the windward plate. The air flowing in the wind-guiding port is concentrated and enhanced by the concentrated wind-guiding plate. The airflow is compressed by the bluff body to form a concentrated airflow. When the airflow passes through the bluff body, the kinetic energy is concentrated due to the reduction of the cross-section. The wind speed of the bluff body wind excitation can be increased. The wind speed sensor is installed to monitor the wind speed of the bluff body wind excitation in real time. The moving frame on the wind-guiding plate cooperates with the No. 2 lead screw and the No. 4 motor to realize the adjustment of the wind-guiding distance at the windward end of the bluff body. That is, the wind-guiding enhancement intensity is adjusted based on wind speed monitoring, and the wind speed of the bluff body wind excitation is controllable and stable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the mass block attached to the free end of the cantilever beam in the vibration energy harvesting device of the present invention;

[0019] Figure 3 This is a schematic diagram of the bluff body at the free end of the cantilever beam of the wind energy harvesting device in this invention.

[0020] Figure 4 This is a schematic diagram of the air guiding mechanism in this invention;

[0021] Figure 5 This is a schematic diagram of the structure of the second cantilever rod in this invention;

[0022] Figure 6 For the present invention Figure 4 Enlarged structural diagram at point A;

[0023] Figure 7 For the present invention Figure 4 Enlarged structural diagram at point B;

[0024] Figure 8 This is a schematic diagram of the windward plate in this invention.

[0025] In the diagram: 1. Base; 2. Cantilever beam; 21. Cantilever rod 1; 22. Cantilever rod 2; 23. Lifting frame; 24. Slide rail 1; 25. Lead screw 1; 26. Motor 1; 3. Adjustment mechanism; 31. Adjustment seat; 32. Adjustment shaft; 33. Worm gear 1; 34. Worm gear 1; 35. Motor 2; 4. Rotation mechanism; 41. Rotation seat; 42. Rotation shaft; 43. Worm gear 2; 44. Worm gear 2; 45. Motor 3; 5. Support rod; 6. 61. Support plate; 62. No. 2 slide rail; 63. No. 2 lead screw; 64. Moving frame; 75. No. 4 motor; 76. Air guide mechanism; 77. Windward plate; 78. Air guide port; 79. Centralized air guide plate; 80. Blunt body; 91. Mass block; 10. Regulator; 11. Wind direction sensor; 12. Wind speed sensor; 13. Mounting base; 14. Support base; 15. Side piezoelectric beam; 16. Connecting base; 17. Swing arm; 18. Bottom piezoelectric beam; 19. Mounting hole; 10. Bolt. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] like Figures 1 to 8As shown, this embodiment of the piezoelectric energy harvesting device based on a suspended support includes a base 1 and a cantilever beam 2. A bottom piezoelectric beam 17 is provided in the middle of the top of the base 1. Support seats 13 are provided on the top of the base 1 on both sides opposite to the bottom piezoelectric beam 17 via mounting seats 12. Side piezoelectric beams 14 are provided on the side of the support seat 13 away from the mounting seats 12. There are two side piezoelectric beams 14. A cantilever beam 2 is provided between the two side piezoelectric beams 14 above the bottom piezoelectric beam 17. The side piezoelectric beams 14 are connected by connecting seats 15. One end of the swing arm 16 is connected to the swing arm 16, and the other end of the swing arm 16 is connected to the lower end of the cantilever beam 2. The cantilever beam 2 includes a first cantilever rod 21 and a second cantilever rod 22. The first cantilever rod 21 is connected to the adjustment mechanism 3 through a connecting mechanism. The adjustment mechanism 3 is connected to the second cantilever rod 22. The top of the second cantilever rod 22 is provided with a rotating mechanism 4. The top of the rotating mechanism 4 is provided with a free end attachment through a support rod 5. The free end attachment includes a blunt body 8 and a mass block 9. The support rod 5 between the rotating mechanism 4 and the blunt body 8 is connected by... The regulator 10 is equipped with a support plate 6. The regulator 10 has the same structure as the regulating mechanism 3. The regulator 10 can rotate and adjust the support plate 6 and the air guide mechanism 7, that is, adjust the position of the air guide mechanism 7 on the blunt body 8. The air guide mechanism 7 is provided on the support plate 6 through a moving mechanism. The air guide mechanism 7 is located at the windward end of the blunt body 8. The top of the air guide mechanism 7 is equipped with a wind direction sensor 11. The top of the support plate 6 on one side of the blunt body 8 is equipped with a wind speed sensor 111. The side piezoelectric beam 14 and the bottom piezoelectric beam 17 form an energy conversion module. The cantilever beam 2 is an elastic beam. By adjusting the height and angle of the mass block 9 on the cantilever beam 2, it can adapt to the vibration excitation device installed at different positions. The blunt body 8 installed on the cantilever beam 2 can adjust the direction of the blunt body 8 according to the wind direction monitored by the wind direction sensor 11 through the rotating mechanism 4, so that the blunt body 8 on the cantilever beam 2 can adapt to the wind direction. By compressing the blunt body 8, the wind-excited airflow forms a concentrated airflow. When the airflow passes through the blunt body 8, the kinetic energy is concentrated due to the reduction of the cross section, and the wind speed of the blunt body 8 can be increased.

[0029] The piezoelectric beam is composed of a piezoelectric material and an elastic base layer. The piezoelectric material exhibits the piezoelectric effect, which can convert mechanical energy into electrical energy, thereby realizing energy collection and conversion. In this invention, the piezoelectric material can be any piezoelectric material with the piezoelectric effect, such as lead zirconate titanate ceramic (PZT) or fiber composite piezoelectric material (MFC). Furthermore, the piezoelectric beam can be a simply supported beam or a fixedly supported beam.

[0030] The swing arm 16 can transfer the inertial constraint force on the cantilever beam 2 under weak excitation conditions to the side piezoelectric beam 14 and the bottom piezoelectric beam 17. The side piezoelectric beam 14 will undergo bending deformation under the action of the swing arm 16, operating in mode d. 31 The swing arm 16 will impact the bottom piezoelectric beam 17, causing the bottom piezoelectric beam 17 to deform under pressure. The working mode is d. 31 and d 33 Two types.

[0031] The root of the cantilever beam 2 is connected to the side piezoelectric beam 14 and the bottom piezoelectric beam 17 via a swing arm 16. Although the vibration amplitude and deformation of the piezoelectric cantilever beam are small under weak excitation, the dynamic constraint force at the root of the cantilever beam 2 is quite large. The swing arm 16 can transfer the large inertial constraint force at the root of the cantilever beam 2 to the side piezoelectric beam 14 and the bottom piezoelectric beam 17, thereby simultaneously achieving d 31 and d 33 Two operating modes effectively improve energy harvesting efficiency. This solves the problems of poor vibration pickup characteristics, low energy conversion efficiency, low output power, and limited operating modes in harvesting devices when environmental excitation is weak, as the harvesting structure is unlikely to experience large-amplitude vibrations and the piezoelectric material cannot produce large bending deformations.

[0032] The device of this invention applies the inertial constraint force generated by vibration to the energy conversion module through the swing arm 16 at the root of the cantilever beam 2. Driven by this force, mechanical energy is converted into electrical energy using the piezoelectric effect of the piezoelectric material; simultaneously, it has d 31 and d 33 The system employs two operating modes. The inertial constraint force transmitted by the swing arm 16 causes the energy conversion module to undergo bending and compressive deformation, thereby triggering two operating modes and effectively improving energy harvesting efficiency. It can be used for energy harvesting from various energy sources, especially vibration energy and wind energy. When the free end attachment of the cantilever beam 2 is a mass block 9, it is used to harvest vibration energy. When the free end attachment of the cantilever beam 2 is a blunt body 8, it generates wind-induced vibration, thereby achieving wind energy harvesting.

[0033] Specifically, the connecting mechanism includes a lifting frame 23, a first sliding groove 24, a first lead screw 25, and a first motor 26. A first sliding groove 24 is provided on one side of the first cantilever 21. The first lead screw 25 and a threaded sleeve are located inside the first sliding groove 24. The lifting frame 23 slides on the first cantilever 21 and is connected to the threaded sleeve. The bottom of the first lead screw 25 is connected to the output end of the first motor 26 on the first cantilever 21 via a coupling. An adjustment mechanism is provided on one side of the lifting frame 23. Mechanism 3, the lifting frame 23 is connected to the second cantilever 22 through the adjustment mechanism 3, the first motor 26 can rotate forward and backward through computer programming control, the first motor 26 on the first cantilever 21 drives the first lead screw 25 in the first slide groove 24 to rotate, the threaded sleeve on the first lead screw 25 drives the lifting frame 23 to slide and rise on the first cantilever 21, and drives the second cantilever 22 to adjust the height of the cantilever and free end accessories.

[0034] Furthermore, the adjustment mechanism 3 includes an adjustment seat 31, an adjustment shaft 32, a first worm gear 33, a first worm 34, and a second motor 35. The lifting frame 23 on one side of the first cantilever 21 is arranged in a U-shaped frame structure. The first worm gear 33 and the first worm 34 are provided on one side of the lifting frame 23 through the adjustment seat 31, and the first worm gear 33 and the first worm 34 are meshed with each other. The lower end of the second cantilever 22 is provided with adjustment shafts 32 on both opposite sides. The second cantilever 22 is connected to the lifting frame 23 through the adjustment shafts 32. The adjustment shaft 32 on one side of the second cantilever 22 is connected to the first motor 35. The worm gear 33 is connected, and a second motor 35 is mounted on one side of the adjusting seat 31 via a motor mount. The output end of the second motor 35 is connected to one end of the first worm 34 via a coupling. The second motor 35 can rotate in both directions by computer programming. The second motor 35 on the adjusting seat 31 drives the first worm 34 to rotate. The rotation of the first worm 34 drives the first worm gear 33 to rotate. The rotation of the first worm gear 33 drives the second cantilever rod 22 to rotate on the lifting frame 23 via the adjusting shaft 32. Thus, the angle of the second cantilever rod 22 and the mass block 9 is adjusted by the adjusting mechanism 3.

[0035] Furthermore, the rotating mechanism 4 includes a rotating seat 41, a rotating shaft 42, a second worm gear 43, a second worm 44, and a third motor 45. The rotating seat 41 is located at the top of the second cantilever rod 22, and the rotating shaft 42 is located at the bottom of the support rod 5. The rotating seat 41 contains a meshing second worm gear 43 and a second worm 44. The bottom of the rotating shaft 42 is connected to the second worm gear 43. A third motor 45 is mounted on one side of the rotating seat 41 via a motor mount. The output end of the third motor 45 is connected to one end of the second worm 44 via a coupling. The input end of the third motor 45 is electrically connected to the output end of the wind direction sensor 11 via a control module. The rotating body can rotate in both directions via computer programming control. The No. 3 motor 45 on the rotating seat 41 drives the No. 2 worm gear 44 to rotate. The rotation of the No. 2 worm gear 44 drives the support rod 5 to rotate through the No. 2 worm wheel 43 and the rotating shaft 42. That is, the rotation of the free end accessory is adjusted through the rotating mechanism 4. The wind direction sensor 11 monitors the wind excitation direction of the blunt body 8 in real time. The wind direction sensor 11 monitors the wind direction and transmits the data to the control module. The control module controls the No. 3 motor 45 according to the wind direction monitored by the wind direction sensor 11. The blunt body 8 installed on the cantilever beam 2 can adjust its direction according to the wind direction monitored by the wind direction sensor 11 through the rotating mechanism 4, so that the blunt body 8 on the cantilever beam 2 adapts to the wind direction.

[0036] Furthermore, the moving mechanism includes a second sliding groove 61, a second lead screw 62, a moving frame 63, and a fourth motor 64. The second sliding groove 61 is provided on the support plate 6. The second lead screw 62 and a threaded block are located inside the second sliding groove 61. The threaded block is connected to the second lead screw 62. The moving frame 63 is slidably mounted on the support plate 6 and is connected to the threaded block. One end of the second lead screw 62 is connected to the output end of the fourth motor 64 via a coupling. The output end of the wind speed sensor 111 is electrically connected to the input end of the fourth motor 64 via a control module. The fourth motor 64... The wind speed sensor 111, which can rotate in both directions via computer programming, monitors the wind speed of the blunt body 8 in real time. The wind speed sensor 111 transmits the monitored wind speed data to the control module. The control module controls the fourth motor 64 on the support plate 6 based on the wind speed data. The fourth motor 64 drives the second lead screw 62 in the second slide groove 61 to rotate. The threaded block on the second lead screw 62 drives the moving frame 63 on the support plate 6 to adjust the distance between the air guide plate and the blunt body 8. That is, the intensity of the air guide enhancement is adjusted based on the wind speed monitoring, and the wind speed of the blunt body 8 is controllable and stable.

[0037] Furthermore, the air guiding mechanism 7 includes a wind-facing plate 71, an air guide port 72, and a concentrated air guide plate 73. The top of the movable frame 63 is provided with a wind-facing plate 71, and the wind-facing plate 71 is provided with an air guide port 72. The air guide port 72 is provided with a concentrated air guide plate 73 inside. The wind-facing plate 71 is installed in front of the wind-facing end of the blunt body 8. The concentrated air guide plate 73 is installed inside the air guide port 72 of the wind-facing plate 71. The air flowing in the air guide port 72 is guided and concentrated by the concentrated air guide plate 73. The compressed air-excited airflow of the blunt body 8 forms a concentrated airflow. When the airflow passes through the blunt body 8, the kinetic energy is concentrated due to the reduction of the cross-section. The wind speed excited by the blunt body 8 can be increased.

[0038] Furthermore, the size of the air guide 72 is larger than the area of ​​the windward surface of the blunt body 8, the air guide area of ​​the air guide 72 is larger than the wind-excited windward surface of the blunt body 8, and the air guide of the blunt body 8 is fully covered.

[0039] Furthermore, the top of the base 1 is provided with a mounting hole 18, and the mounting base 12 is fixedly installed to the base 1 through the bolt 19 in the mounting hole 18, making the installation and fixing of the base 1 convenient.

[0040] The usage method of this embodiment is as follows: the bolt 19 in the mounting hole 18 fixes the mounting base 12 and the support base 13 to the top of the base 1. The mass block 9 is installed on the support rod 5, or the blunt body 8 is installed on the support rod 5 which is equipped with the support plate 6 and the air guide mechanism 7. The motor 26 on the first cantilever rod 21 drives the first lead screw 25 in the first slide groove 24 to rotate. The threaded sleeve on the first lead screw 25 drives the lifting frame 23 to slide and rise on the first cantilever rod 21, thereby driving the second cantilever rod 22 to adjust the height of the cantilever beam 2 and the free end accessories. The motor 35 on the adjusting seat 31 drives the first worm gear 34 to rotate. The first worm gear 34 rotates, driving the first worm wheel 33 to rotate. The rotation of the first worm wheel 33 drives the second cantilever rod 22 to rotate on the lifting frame 23 via the adjusting shaft 32. This allows the adjusting mechanism 3 to adjust the angle of the second cantilever rod 22 and the mass block 9, thus achieving the height and angle adjustment of the free end accessory for piezoelectric energy harvesting. The height and angle of the mass block 9 on the cantilever beam 2 can be adjusted to adapt to vibration excitation devices installed in different positions. The third motor 45 on the rotating seat 41 drives the second worm gear 44 to rotate. The rotation of the second worm gear 44 drives the support rod 5 to rotate via the second worm wheel 43 and the rotating shaft 42. That is, the rotation mechanism 4 adjusts the rotation of the free end accessory. The wind direction sensor 11 monitors the wind excitation direction of the blunt body 8 in real time. The wind direction sensor 11 transmits the wind direction data to the control module. The control module controls the No. 3 motor 45 according to the wind direction monitored by the wind direction sensor 11. The blunt body 8 installed on the cantilever beam 2 can adjust its direction according to the wind direction monitored by the wind direction sensor 11 through the rotation mechanism 4, so that the blunt body 8 on the cantilever beam 2 can adapt to the wind direction. Through the wind guide mechanism 7 set on the windward end of the blunt body 8, a windward plate 71 is installed in front of the windward end of the blunt body 8. A concentrated wind guide plate 73 is installed in the wind guide port 72 of the windward plate 71. The air flowing in the wind guide port 72 is concentrated and enhanced by the concentrated wind guide plate 73. The compressed blunt body 8 generates concentrated airflow. When the airflow passes through the blunt body 8, the kinetic energy is concentrated due to the reduced cross-section, which increases the wind speed generated by the blunt body 8. The wind speed sensor 111 monitors the wind speed generated by the blunt body 8 in real time and transmits the monitored wind speed data to the control module. The control module controls the fourth motor 64 on the support plate 6 according to the wind speed data. The fourth motor 64 drives the second lead screw 62 in the second slide groove 61 to rotate. The threaded block on the second lead screw 62 drives the moving frame 63 on the support plate 6 to adjust the distance between the air guide plate and the blunt body 8. That is, the intensity of the air guide enhancement is adjusted based on the wind speed monitoring, and the wind speed generated by the blunt body 8 is controllable and stable.

[0041] When the free end attachment of the cantilever beam 2 is a mass block 9, the cantilever beam 2 will vibrate under vibration excitation. The swing arm 16 can transfer the large inertial constraint force at the root of the cantilever beam 2 to the energy conversion module. Subsequently, the piezoelectric materials on the side piezoelectric beam 14 and the bottom piezoelectric beam 17 can convert the mechanical energy generated by the vibration into electrical energy through the piezoelectric effect, thereby realizing the collection of vibration energy. When the free end attachment of the cantilever beam 2 is a blunt body 8, under wind excitation, the force on the blunt body 8 causes the cantilever beam 2 to produce wind-induced vibration. The inertial constraint force transmitted by the swing arm 16 will also drive the energy conversion module to work, thereby realizing the collection of wind energy.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A piezoelectric energy harvesting device based on a suspended support, comprising a base (1) and a cantilever beam (2), characterized in that: The base (1) has a bottom piezoelectric beam (17) in the middle of its top. The bottom piezoelectric beam (17) is connected to the top of the base (1) on both sides of the base (1) by a mounting seat (12) and a support seat (13). The support seat (13) is provided with a side piezoelectric beam (14) on the side away from the mounting seat (12). There are two side piezoelectric beams (14). A cantilever beam (2) is provided between the two side piezoelectric beams (14) above the bottom piezoelectric beam (17). The side piezoelectric beams (14) are connected to one end of a swing arm (16) by a connecting seat (15). The other end of the swing arm (16) is connected to the lower end of the cantilever beam (2). The cantilever beam (2) includes a first cantilever rod (21) and a second cantilever rod (22). The first cantilever rod (21) is connected to the second cantilever rod (22) by a connecting seat (15). The connecting mechanism is connected to the adjusting mechanism (3), the adjusting mechanism (3) is connected to the second cantilever rod (22), the top of the second cantilever rod (22) is provided with a rotating mechanism (4), the top of the rotating mechanism (4) is provided with a free end attachment through the support rod (5), the free end attachment includes a blunt body (8) and a mass block (9), the support rod (5) between the rotating mechanism (4) and the blunt body (8) is provided with a support plate (6) through the adjuster (10), the support plate (6) is provided with a wind guide mechanism (7) through the moving mechanism, the wind guide mechanism (7) is located at the windward end of the blunt body (8), the top of the wind guide mechanism (7) is provided with a wind direction sensor (11), and the top of the support plate (6) on one side of the blunt body (8) is provided with a wind speed sensor (111).

2. The piezoelectric energy harvesting device based on a suspension support according to claim 1, characterized in that: The connecting mechanism includes a lifting frame (23), a first slide groove (24), a first lead screw (25), and a first motor (26). A first slide groove (24) is provided on one side of the first cantilever rod (21). A first lead screw (25) and a threaded sleeve are provided inside the first slide groove (24). The lifting frame (23) is slidably provided on the first cantilever rod (21). The lifting frame (23) is connected to the threaded sleeve. The bottom of the first lead screw (25) is connected to the output end of the first motor (26) on the first cantilever rod (21) through a coupling. An adjustment mechanism (3) is provided on one side of the lifting frame (23). The lifting frame (23) is connected to the second cantilever rod (22) through the adjustment mechanism (3).

3. The piezoelectric energy harvesting device based on a suspended support according to claim 2, characterized in that: The adjustment mechanism (3) includes an adjustment seat (31), an adjustment shaft (32), a first worm gear (33), a first worm (34), and a second motor (35). The lifting frame (23) on one side of the first cantilever rod (21) is arranged in a U-shaped frame structure. The first worm gear (33) and the first worm (34) are provided on one side of the lifting frame (23) through the adjustment seat (31). The first worm gear (33) and the first worm (34) mesh with each other. The lower end of the second cantilever rod (22) is provided with adjustment shafts (32) on both sides. The second cantilever rod (22) is connected to the lifting frame (23) through the adjustment shaft (32). The adjustment shaft (32) on one side of the second cantilever rod (22) is connected to the first worm gear (33). The second motor (35) is provided on one side of the adjustment seat (31) through the motor seat. The output end of the second motor (35) is connected to one end of the first worm (34) through a coupling.

4. The piezoelectric energy harvesting device based on a suspended support according to claim 1, characterized in that: The rotating mechanism (4) includes a rotating seat (41), a rotating shaft (42), a second worm gear (43), a second worm (44), and a third motor (45). The rotating seat (41) is located at the top of the second cantilever rod (22), and the rotating shaft (42) is located at the bottom of the support rod (5). The rotating seat (41) is equipped with a meshing second worm gear (43) and a second worm (44). The bottom of the rotating shaft (42) is connected to the second worm gear (43). The third motor (45) is located on one side of the rotating seat (41) via a motor mount. The output end of the third motor (45) is connected to one end of the second worm (44) via a coupling. The input end of the third motor (45) is electrically connected to the output end of the wind direction sensor (11) via a control module.

5. The piezoelectric energy harvesting device based on a suspension support according to claim 1, characterized in that: The moving mechanism includes a second slide groove (61), a second lead screw (62), a moving frame (63), and a fourth motor (64). The second slide groove (61) is provided on the support plate (6). The second lead screw (62) and a threaded block are provided inside the second slide groove (61). The threaded block is connected to the second lead screw (62). The moving frame (63) is slidably provided on the support plate (6). The moving frame (63) is connected to the threaded block. One end of the second lead screw (62) is connected to the output end of the fourth motor (64) through a coupling. The output end of the wind speed sensor (111) is electrically connected to the input end of the fourth motor (64) through a control module.

6. The piezoelectric energy harvesting device based on a suspension support according to claim 5, characterized in that: The air guiding mechanism (7) includes a wind-facing plate (71), an air guide (72) and a centralized air guide (73). The top of the mobile frame (63) is provided with a wind-facing plate (71), an air guide (72) is provided on the wind-facing plate (71), and a centralized air guide (73) is provided inside the air guide (72).

7. The piezoelectric energy harvesting device based on a suspension support according to claim 6, characterized in that: The size of the air guide (72) is larger than the area of ​​the windward surface of the blunt body (8).

8. The piezoelectric energy harvesting device based on a suspension support according to claim 1, characterized in that: The base (1) has a mounting hole (18) on its top, and the mounting seat (12) is fixedly installed to the base (1) by bolts (19) in the mounting hole (18).

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