An energy harvesting structure based on piezoelectric effect

Abstract

The application provides an energy collection structure based on a piezoelectric effect, and relates to the technical field of energy recycling, which comprises a circular supporting base, the top of the circular supporting base is fixed with a lower supporting plate, one side of the circular supporting base is provided with two first clamping mechanisms, and the top of the two first clamping mechanisms is provided with two second clamping mechanisms. Through cooperation of the beryllium bronze substrate, the lead zirconate titanate piezoelectric plate, the rectangular piezoelectric unit, the first circular magnet and the second circular magnet, the piezoelectric energy collection mechanism can realize multi-point collection, the situation that the whole system is paralyzed when a single energy collection module fails is effectively avoided, and the use efficiency is improved. The three beryllium bronze substrates are stably fixed through cooperation of the lower supporting plate, the upper supporting plate, the bolt, the first clamping mechanism and the second clamping mechanism. The vertical rod, the supporting rod, the connecting strip, the connecting rod and the screw are arranged, so that the spacing between the first clamping mechanism and the second clamping mechanism is conveniently adjusted.

Description

Technical Field

[0001] This invention relates to the field of energy recovery and utilization technology, and in particular to an energy harvesting structure based on the piezoelectric effect. Background Technology

[0002] Energy recovery technology has always been a key research focus for scholars worldwide. The main energy sources dispersed in the environment include solar, magnetic, wind, solar, thermal, and vibrational energy, all readily available in daily life. However, wind, solar, and thermal energy have certain limitations. Mechanical vibrational energy, as an unstable energy source, is also ubiquitous in daily life. The energy output of vibrational energy depends only on the vibration source and does not produce significant fluctuations. Therefore, using vibrational energy as a power supply method for fields such as security and wireless sensing is an excellent choice.

[0003] Currently, many scientists around the world are conducting multi-level research on energy harvesting devices and have made great progress. However, there are few reports on the overall research and design of energy harvesting systems and their commercial applications. The main problems with energy harvesting mechanisms at present are: lack of complete and systematic research and design of energy harvesting systems; lack of design for multi-point harvesting systems using piezoelectric energy harvesting mechanisms; and the paralysis of the entire system when a single energy harvesting module fails. Summary of the Invention

[0004] The purpose of this invention is to address the problems in existing technologies, such as the lack of complete and systematic research and design of energy harvesting systems, the lack of design of multi-point harvesting systems for piezoelectric energy harvesting mechanisms, and the paralysis of the entire system when a single energy harvesting module fails. Therefore, this invention proposes an energy harvesting structure based on the piezoelectric effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an energy harvesting structure based on the piezoelectric effect, comprising a circular support base, a vertical pole, a support rod, a connecting strip, a pillar, and a base plate. The top of the circular support base is fixed with a lower support plate, the base plate is fixedly installed below the circular support base, and the lower end of the vertical pole is connected to the base plate.

[0006] The base plate is provided with a first clamping mechanism and a second clamping mechanism from bottom to top on the side away from the circular support base, and the upright rod runs vertically through the first clamping mechanism and the second clamping mechanism from top to bottom.

[0007] Three beryllium bronze substrates are arranged sequentially from bottom to top on the base plate. The end of the bottom beryllium bronze substrate is held by the first clamping mechanism, one end of the middle beryllium bronze substrate is connected to the lower support plate, and the end of the top beryllium bronze substrate is held by the second clamping mechanism.

[0008] Rectangular piezoelectric units are embedded in the middle section of the top and bottom beryllium bronze substrates, and a lead zirconate titanate piezoelectric plate is embedded in the middle section of the middle beryllium bronze substrate.

[0009] It also includes a first circular magnet and a second circular magnet. The beryllium bronze substrate located in the middle is connected to the second circular magnet away from the lower support plate. The two second circular magnets are arranged symmetrically from top to bottom. The rectangular piezoelectric unit is connected to the first circular magnet on the side facing the second circular magnet.

[0010] The lower support plate is provided with an upper support plate. The lower support plate and the upper support plate cooperate to clamp the beryllium bronze substrate in the middle. A bolt is threaded through the upper support plate and the lower support plate.

[0011] Preferably, the two second circular magnets are in a magnetically opposite pole attracting state on the beryllium bronze substrate.

[0012] Preferably, the opposite sides of the two second circular magnets are in a state of repulsion with the opposite side of the first circular magnet.

[0013] Preferably, both the lead zirconate titanate piezoelectric plate and the rectangular piezoelectric unit are bonded to the beryllium bronze substrate using epoxy conductive silver paste.

[0014] Preferably, the front end of the connecting strip is fitted onto the upright pole body, the connecting strip is located between the first clamping mechanism and the second clamping mechanism, the center of the support rod is pivotally connected to the front end of the connecting strip, and both ends of the support rod are hinged with connecting rods, one of which is connected to the first clamping mechanism and the other is connected to the second clamping mechanism.

[0015] Preferably, the connecting rod has a screw at the end away from the support rod, and the upright has a straight groove on the side facing the screw. One end of the screw passes through the first clamping mechanism and the second clamping mechanism, extends into the straight groove, and engages with the straight groove.

[0016] Preferably, the pole has scale lines engraved along its length, with the value at the center of the pole aligned with the scale line being zero, and the value corresponding to the scale line being larger the further away from the center of the pole.

[0017] Preferably, the rear end of the connecting strip extends between the lower support plate and the upper support plate, the column is vertically mounted on the lower support plate, the upper end of the column passes through the connecting strip and the upper support plate in sequence, the column body is fitted with a small spring, a large spring is welded to the top of the base plate, and the upper end of the large spring is connected to the connecting strip.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0019] In this invention, by combining a beryllium bronze substrate, a lead zirconate titanate piezoelectric plate, a rectangular piezoelectric unit, a first circular magnet, and a second circular magnet, multi-point collection of piezoelectric energy is achieved. This effectively avoids the situation where the entire system is paralyzed if a single energy collection module fails, thus effectively improving the utilization efficiency of the energy collection mechanism. With the cooperation of the lower support plate, the upper support plate, bolts, the first clamping mechanism, and the second clamping mechanism, the three beryllium bronze substrates can be stably fixed. Attached Figure Description

[0020] Figure 1 An isometric view of an energy harvesting structure based on the piezoelectric effect is provided for this invention;

[0021] Figure 2 This invention provides a schematic diagram of a power generation point for an energy harvesting structure based on the piezoelectric effect;

[0022] Figure 3 This is a diagram illustrating the working state of the structure of the present invention;

[0023] Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the support structure of the present invention.

[0025] Legend: 1. Circular support base, 2. Lower support plate, 3. First clamping mechanism, 4. Second clamping mechanism, 5. Beryllium bronze substrate, 6. Lead zirconate titanate piezoelectric plate, 7. Rectangular piezoelectric unit, 8. First circular magnet, 9. Second circular magnet, 10. Upper support plate, 11. Bolt, 12. Upright rod, 121. Scale line, 122. Straight groove, 13. Support rod, 14. Connecting rod, 15. Screw, 16. Connecting strip, 17. Support column, 171. Small spring, 18. Base plate, 181. Large spring. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0028] like Figure 1 and Figure 2As shown, the present invention provides an energy harvesting structure based on the piezoelectric effect, including a circular support base 1, a vertical pole 12, a support rod 13, a connecting strip 16, a support column 17, and a base plate 18. A lower support pressure plate 2 is fixedly installed on the top of the circular support base 1, and the base plate 18 is fixedly installed below the base 1. The lower end of the vertical pole 12 is welded to the base plate 18.

[0029] The base plate 18 is provided with a first clamping mechanism 3 and a second clamping mechanism 4 from bottom to top on the side away from the circular support base 1, and the upright 12 runs vertically through the first clamping mechanism 3 and the second clamping mechanism 4 from top to bottom.

[0030] Three beryllium bronze substrates 5 are arranged sequentially from bottom to top on the base plate 18. The end of the bottom beryllium bronze substrate 5 is clamped by the first clamping mechanism 3, one end of the middle beryllium bronze substrate 5 is connected to the lower support plate 2, and the end of the top beryllium bronze substrate 5 is clamped by the second clamping mechanism 4.

[0031] Rectangular piezoelectric units 7 are embedded in the middle sections of the top and bottom beryllium bronze substrates 5, and a lead zirconate titanate piezoelectric plate 6 is embedded in the middle section of the beryllium bronze substrate 5. Both the lead zirconate titanate piezoelectric plate 6 and the rectangular piezoelectric units 7 are attached to the beryllium bronze substrate 5 with epoxy conductive silver paste.

[0032] It also includes a first circular magnet 8 and a second circular magnet 9. The beryllium bronze substrate 5 located in the middle is fixedly bonded to the second circular magnet 9 at the end away from the lower support plate 2. The two second circular magnets 9 are arranged symmetrically from top to bottom. The rectangular piezoelectric unit 7 is fixedly bonded to the first circular magnet 8 on the side facing the second circular magnet 9.

[0033] The lower support plate 2 is provided with an upper support plate 10. The lower support plate 2 and the upper support plate 10 cooperate to clamp the beryllium bronze substrate 5 in the middle. A bolt 11 is threaded through the upper support plate 10 and the lower support plate 2.

[0034] The two second circular magnets 9 are in a magnetically opposite pole attracting state on the beryllium bronze substrate 5, and the opposite side of the two second circular magnets 9 is in a like pole repulsive state with the opposite side of the two first circular magnets 8.

[0035] The desired effect is as follows: when the energy harvesting mechanism is needed, firstly, the lower support plate 2, the upper support plate 10, and the bolts 11 fix one of the beryllium bronze substrates 5. Then, the first clamping mechanism 3 and the second clamping mechanism 4 are used to fix the other two beryllium bronze substrates 5. Next, the lead zirconate titanate piezoelectric plate 6 and two rectangular piezoelectric units 7 are respectively bonded to the three beryllium bronze substrates 5 using epoxy conductive silver paste. Then, the second circular magnet 9 is placed at the end of one of the beryllium bronze substrates 5, acting as a mass block. At the same time, the distance between the three beryllium bronze substrates 5 can be changed by changing the mass of the second circular magnet 9 at the end. The resonant frequency is determined, and finally, the first circular magnet 8 is glued to the two rectangular piezoelectric units 7 respectively. At the same time, the circular support base 1 is used to connect the entire mechanism to other components. When the vibration source drives one of the beryllium bronze substrates 5 to vibrate, the beryllium bronze substrate 5 will transfer the vibration energy to the other two beryllium bronze substrates 5 through the magnetic coupling between the two second circular magnets 9 for energy recovery. In this way, the vibration energy can be converted into electrical energy, which greatly improves the efficiency of energy collection by using three-point energy collection in the same system. At the same time, it ensures the reliability of the external energy supply of the collection mechanism and greatly improves the commercial feasibility.

[0036] Working principle: When the energy harvesting mechanism is needed, firstly, the lower support plate 2, the upper support plate 10, and the bolts 11 fix one of the beryllium bronze substrates 5. Then, the first clamping mechanism 3 and the second clamping mechanism 4 are used to fix the other two beryllium bronze substrates 5. Next, the lead zirconate titanate piezoelectric plate 6 and two rectangular piezoelectric units 7 are respectively bonded to the three beryllium bronze substrates 5 using epoxy conductive silver paste. Then, the second circular magnet 9 is placed at the end of one of the beryllium bronze substrates 5, which acts as a mass block. At the same time, the mass of the second circular magnet 9 at the end can be changed to change the common mass between the three beryllium bronze substrates 5. The vibration frequency is determined, and finally, the first circular magnet 8 is glued to the two rectangular piezoelectric units 7 respectively. At the same time, the circular support base 1 is used to connect the entire mechanism to other components. When the vibration source drives one of the beryllium bronze substrates 5 to vibrate, the beryllium bronze substrate 5 will transfer the vibration energy to the other two beryllium bronze substrates 5 through the magnetic coupling between the two second circular magnets 9 for energy recovery. In this way, the vibration energy can be converted into electrical energy, which greatly improves the efficiency of energy collection by using three points of energy collection in the same system. At the same time, it ensures the reliability of the external energy supply of the collection mechanism and greatly improves the commercial feasibility.

[0037] like Figures 3-5 As shown, the front end of the connecting strip 16 is fitted onto the upright 12, and the connecting strip 16 is located between the first clamping mechanism 3 and the second clamping mechanism 4.

[0038] The support rod 13 is pivotally connected to the front end of the connecting strip 16 at its center, and both ends of the support rod 13 are hinged to connecting rods 14. (See attached...) Figure 4 One of the links 14 is connected to the first clamping mechanism 3, and the other link 14 is connected to the second clamping mechanism 4.

[0039] A screw 15 is threaded onto the end of the connecting rod 14 away from the support rod 13. A straight groove 122 is provided on the side of the upright rod 12 facing the screw 15. One end of the screw 15 passes through the first clamping mechanism 3 and the second clamping mechanism 4 and extends into the straight groove 122, and the end of the screw 15 is engaged with the straight groove 122. This serves to fix the clamping mechanism.

[0040] The support rod 13, connecting rod 14, and screw 15 work together to adjust the distance between the first clamping mechanism 3 and the second clamping mechanism 4, thereby changing the distance between the three beryllium bronze substrates 5. The greater the distance between the beryllium bronze substrates 5, the weaker the energy harvesting effect of the vibration. Therefore, a stronger vibration frequency is required. By adjusting the distance between the first clamping mechanism 3 and the second clamping mechanism 4, excessive vibration force is prevented from causing the beryllium bronze substrates 5 to collide and be damaged.

[0041] The upright 12 has graduation lines 121 engraved along its length. The value at the center of the upright 12 aligned with graduation line 121 is zero. The further away from the center of the upright 12, the larger the value corresponding to graduation line 121. The connecting strip 16 is located at the zero graduation. The graduation lines 121 allow for easy visual observation of the distance between the first clamping mechanism 3 and the second clamping mechanism 4, facilitating adjustment.

[0042] The rear end of the connecting strip 16 extends between the lower support plate 2 and the upper support plate 10. The support column 17 is vertically welded to the lower support plate 2. The upper end of the support column 17 passes through the connecting strip 16 and the upper support plate 10 in sequence. The support column 17 is covered with a small spring 171. A large spring 181 is welded to the top of the base plate 18. The upper end of the large spring 181 is connected to the connecting strip 16.

[0043] When the upper support plate 10 and the lower support plate 2 are fixed together, the upper support plate 10 presses down on the connecting strip 16. As the connecting strip 16 descends, the small spring 171 and the large spring 181 contract and support the entire connecting strip. The upper support plate 10 presses down on the connecting strip 16, bringing the connecting strip 16 to the zero mark of the scale line 121. This serves the purpose of calibration.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An energy harvesting structure based on the piezoelectric effect, characterized in that: It includes a circular support base (1), a vertical pole (12), a support rod (13), a connecting strip (16), a support column (17), and a base plate (18). The top of the circular support base (1) is fixed with a lower support pressure plate (2), and the base plate (18) is fixedly installed below the circular support base (1). The lower end of the vertical pole (12) is connected to the base plate (18). The base plate (18) is provided with a first clamping mechanism (3) and a second clamping mechanism (4) from bottom to top on the side away from the circular support base (1), and the upright (12) runs vertically through the first clamping mechanism (3) and the second clamping mechanism (4) from top to bottom. Three beryllium bronze substrates (5) are arranged sequentially from bottom to top on the base plate (18). The end of the beryllium bronze substrate (5) located at the bottom is clamped by the first clamping mechanism (3), one end of the beryllium bronze substrate (5) located in the middle is connected to the lower support plate (2), and the end of the beryllium bronze substrate (5) located at the top is clamped by the second clamping mechanism (4). The uppermost and lowermost beryllium bronze substrates (5) are inlaid with rectangular piezoelectric units (7) in the middle section, and the middle section of the beryllium bronze substrates (5) in the middle is inlaid with lead zirconate titanate piezoelectric plate (6). It also includes a first circular magnet (8) and a second circular magnet (9). The beryllium bronze substrate (5) located in the middle is connected to the second circular magnet (9) at the end away from the lower support plate (2). The two second circular magnets (9) are arranged symmetrically up and down. The rectangular piezoelectric unit (7) is connected to the first circular magnet (8) on the side facing the second circular magnet (9). The lower support plate (2) is provided with an upper support plate (10). The lower support plate (2) and the upper support plate (10) cooperate to clamp the beryllium bronze substrate (5) in the middle. A bolt (11) is threaded through the upper support plate (10) and the lower support plate (2). Two second circular magnets (9) are magnetically attracted to each other on the beryllium bronze substrate (5); The opposite sides of the two second circular magnets (9) are in a state of repulsion with the opposite side of the first circular magnet (8); The front end of the connecting strip (16) is fitted onto the body of the upright (12). The connecting strip (16) is located between the first clamping mechanism (3) and the second clamping mechanism (4). The center of the support rod (13) is pivotally connected to the front end of the connecting strip (16). Both ends of the support rod (13) are hinged with connecting rods (14). One connecting rod (14) is connected to the first clamping mechanism (3), and the other connecting rod (14) is connected to the second clamping mechanism (4). The rear end of the connecting strip (16) extends between the lower support plate (2) and the upper support plate (10). The support column (17) is vertically mounted on the lower support plate (2). The upper end of the support column (17) passes through the connecting strip (16) and the upper support plate (10) in sequence. The support column (17) is fitted with a small spring (171). A large spring (181) is welded to the top of the base plate (18). The upper end of the large spring (181) is connected to the connecting strip (16).

2. The energy harvesting structure based on the piezoelectric effect according to claim 1, characterized in that: The lead zirconate titanate piezoelectric plate (6) and the rectangular piezoelectric unit (7) are both attached to the beryllium bronze substrate (5) by epoxy resin conductive silver paste.

3. The energy harvesting structure based on the piezoelectric effect according to claim 2, characterized in that: The connecting rod (14) has a screw (15) at the end away from the support rod (13), and the upright rod (12) has a straight groove (122) on the side facing the screw (15). One end of the screw (15) passes through the first clamping mechanism (3) and the second clamping mechanism (4) and extends into the straight groove (122), and is engaged with the straight groove (122).

4. The energy harvesting structure based on the piezoelectric effect according to claim 3, characterized in that: The pole (12) has a scale line (121) engraved along its length. The value of the scale line (121) aligned with the center of the pole (12) is zero. The farther away from the center of the pole (12), the larger the value corresponding to the scale line (121).

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