A circumferentially distributed piezoelectric energy collection device and method for rails

Abstract

The present invention discloses a circumferentially distributed piezoelectric energy collection device and method for rails, the device comprising: a housing, a rubber block arranged in the housing, a pressure plate arranged above the rubber block, and a piezoelectric module arranged below the rubber block; the piezoelectric module comprises a pressure ring and a piezoelectric sheet, the pressure ring is located below the rubber block; the piezoelectric sheet is located below the pressure ring, and the piezoelectric sheet is arranged around the housing in a circumferential distribution, when the pressure plate presses the rubber block downward due to pressure from above, the pressure ring presses the piezoelectric sheet downward to generate voltage. The present invention can increase the number of piezoelectric sheets used per unit area by arranging the piezoelectric sheets around the housing in a circumferential distribution, thereby increasing the piezoelectric power output and achieving higher energy collection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of energy recovery and utilization, and in particular to a circumferentially distributed piezoelectric energy collection device and method applied to a track. Background Art

[0002] In recent years, steel spring floating plate track has been widely used in urban rail transit due to its obvious vibration suppression effect. The steel spring floating plate track consists of a floating concrete plate, a steel spring isolator and a concrete base. It is essentially a mass spring isolation system. Due to the excessive load of the train and the frequent load action, the steel spring isolator is prone to fatigue failure. At this time, if a piezoelectric material is used to make an energy collector and place it in the gap between the floating concrete plate and the concrete base, it can not only improve the fatigue strength of the floating concrete plate and the steel spring isolator, but also convert mechanical energy into electrical energy to meet the power supply needs of low-power devices in rail transit and achieve the energy conservation and emission reduction goals of green environmental protection and sustainable development.

[0003] The vibration caused by train vehicles is a clean, continuous and stable energy source, and piezoelectric energy harvesting devices have the advantages of high energy density, no electromagnetic interference, and easy to achieve small integration, which are suitable for collecting this energy. At present, the structures of relatively mature piezoelectric energy harvesting devices mainly include cymbal structure, stacked structure and cantilever beam structure. The cymbal structure and stacked structure have the characteristics of small deformation, which leads to the low electrical output power generated by their piezoelectric effect, so the energy collection effect of the first two structures directly applied to the track is not good.

[0004] Therefore, the prior art still needs to be improved and enhanced. Summary of the invention

[0005] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a circumferentially distributed piezoelectric energy collection device and method for rails is provided, which aims to increase the number of piezoelectric sheets used per unit area by arranging piezoelectric sheets around the box in a circular distribution, thereby improving the piezoelectric power output and making the energy collection efficiency higher.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, the present invention provides a circumferential distributed piezoelectric energy harvesting device for rails, wherein the device comprises a box, a rubber block disposed in the box, a pressure plate disposed above the rubber block, and a piezoelectric module disposed below the rubber block; the piezoelectric module comprises:

[0008] A pressure ring, the pressure ring is located below the rubber block;

[0009] The piezoelectric sheet is located below the pressure ring and is arranged around the box body in a circumferential distribution. When the pressure plate presses the rubber block downward due to pressure from above, the pressure ring presses the piezoelectric sheet downward to generate voltage.

[0010] In one implementation, the housing is configured as a cylindrical housing, and the piezoelectric sheet is disposed on the outer periphery of the cylindrical housing.

[0011] In one implementation, the piezoelectric module also includes a shaft, the pressure plate and the pressure ring are fixedly connected to the shaft, and the rubber block is non-fixedly sleeved on the shaft. When the pressure plate squeezes the rubber block downward due to pressure from above, the shaft drives the pressure ring to squeeze the piezoelectric sheet downward to generate voltage.

[0012] In one implementation, a support block is further provided on the shaft rod, and the support block is located below the rubber block.

[0013] In one implementation, threaded holes are provided on the pressure plate and on the top of the shaft rod, screws are provided in the threaded holes, and the pressure plate is fixed to the shaft rod by the screws.

[0014] In one implementation, a first through hole is provided on the rubber block, and the rubber block is non-fixedly sleeved with the shaft rod through the first through hole.

[0015] In one implementation, a second through hole is provided on the support block, and the support block is non-fixedly sleeved with the shaft rod through the second through hole.

[0016] In one implementation, there are multiple pressure rings, which are arranged at intervals on the shaft; a stepped square hole is provided on the box body, a slider is provided in the square hole, a slide groove is provided on the slider, one end of the piezoelectric sheet is provided in the slide groove, and the other end of the piezoelectric sheet is located between two adjacent pressure rings.

[0017] In one implementation, the slider is also provided with a wiring groove and a wire hole.

[0018] In one implementation, the piezoelectric sheet includes a substrate, an upper piezoelectric sheet disposed above the substrate, and a lower piezoelectric sheet disposed below the substrate; the upper piezoelectric sheet and the lower piezoelectric sheet are electrically connected in double-layer series and have opposite polarization directions.

[0019] In a second aspect, an embodiment of the present invention further provides an energy collection method for a circumferentially distributed piezoelectric energy collection device applied to a track based on any one of the above solutions, wherein the method comprises:

[0020] When the train wheel set travels over the track in which the circumferential distributed piezoelectric energy collection device applied to the track is buried, the extrusion plate moves downward under the action of the train load;

[0021] The pressure plate squeezes the rubber block to drive the shaft rod downward, so that the pressure ring on the shaft rod squeezes the piezoelectric sheet. When the train wheelset leaves, the load effect disappears. Under the elastic restoring force of the rubber block, the rubber block relaxes and drives the pressure plate upward, which plays a role in restoring the position of the pressure plate and the pressure ring. The piezoelectric sheet vibrates in a cantilever beam manner and generates voltage.

[0022] The generated electric energy is rectified, filtered, and stabilized before being collected in supercapacitors in subsequent circuits to meet the power supply needs of low-power devices in rail transit.

[0023] Beneficial effects: Compared with the prior art, the present invention provides a circumferentially distributed piezoelectric energy collection device and method for rails, the device comprising: a housing, a rubber block arranged in the housing, a pressure plate arranged above the rubber block, and a piezoelectric module arranged below the rubber block; the piezoelectric module comprises a pressure ring and a piezoelectric sheet, the pressure ring is located below the rubber block; the piezoelectric sheet is located below the pressure ring, and the piezoelectric sheet is arranged around the housing in a circumferential distribution, when the pressure plate presses the rubber block downward due to pressure from above, the pressure ring presses the piezoelectric sheet downward to generate voltage. The present invention arranges the piezoelectric sheets around the housing in a circumferential distribution, which can increase the number of piezoelectric sheets used per unit area, thereby increasing the piezoelectric power output and improving the energy collection efficiency. Moreover, the piezoelectric sheets in the present invention can be arranged in multiple layers, thereby further improving the piezoelectric power output of the entire device. The circumferentially distributed piezoelectric energy collection device for rails of the present invention has a simple structure and high power generation efficiency, and the piezoelectric sheets are positioned and installed in a sliding groove manner, which is more convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An exploded view of a circumferentially distributed piezoelectric energy harvesting device applied to a track provided in an embodiment of the present invention.

[0025] Figure 2 A cross-sectional view of a circumferentially distributed piezoelectric energy harvesting device applied to a track provided in an embodiment of the present invention.

[0026] Figure 3 A schematic diagram of the box structure of a circumferentially distributed piezoelectric energy harvesting device applied to a track provided in an embodiment of the present invention.

[0027] Figure 4 A schematic diagram of the structure of a slider in a circumferentially distributed piezoelectric energy collection device applied to a track provided in an embodiment of the present invention.

[0028] Figure 5 A diagram of a usage scenario of a circumferentially distributed piezoelectric energy harvesting device applied to a track provided in an embodiment of the present invention.

[0029] Figure 6 Schematic diagram of different rubber block structures in a circumferentially distributed piezoelectric energy harvesting device applied to a track provided by an embodiment of the present invention.

[0030] Figure 7 The displacement deformation diagram of the pressure ring and the piezoelectric sheet of the energy collection device composed of different rubber block structures in the circumferential distributed piezoelectric energy collection device applied to the track provided by the embodiment of the present invention.

[0031] Figure 8 This is a graph of the output voltage results of an energy harvesting device composed of different rubber block structures in a circumferentially distributed piezoelectric energy harvesting device for rails provided by an embodiment of the present invention.

[0032] Fig. 9 A schematic diagram of the contact length between the piezoelectric ring and the piezoelectric sheet in a circumferentially distributed piezoelectric energy harvesting device for rails provided in an embodiment of the present invention.

[0033] Fig.10 A graph showing the effect of the contact length between the pressure ring and the piezoelectric sheet on the output voltage of a circumferentially distributed piezoelectric energy harvesting device for rails provided in an embodiment of the present invention when the same load is applied.

[0034] Fig.11 A schematic diagram of the relationship between the contact length between the pressure ring and the piezoelectric sheet and the life of the piezoelectric sheet in a circumferentially distributed piezoelectric energy collection device for rails provided in an embodiment of the present invention.

[0035] Fig.12 A flowchart of a specific implementation of a circumferentially distributed piezoelectric energy collection method applied to a track provided in an embodiment of the present invention.

[0036] Description of labels:

[0037] Cabinet 10 Square hole 101 Rubber Blocks 20 Pressure plate 30 Support block 40 Piezoelectric Module 50 Pressure ring 501 Shaft 502 Piezoelectric Sheet 503 slider 504 Wire hole 505 Chute 506 Threaded Hole 5021 Screws 5022 Pads 60 DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] In recent years, steel spring floating plate track has been widely used in urban rail transit due to its obvious vibration suppression effect. The steel spring floating plate track consists of a floating concrete plate, a steel spring isolator and a concrete base. It is essentially a mass spring isolation system. Due to the excessive load of the train and the frequent load action, the steel spring isolator is prone to fatigue failure. At this time, if a piezoelectric material is used to make an energy collector and place it in the gap between the floating concrete plate and the concrete base, it can not only improve the fatigue strength of the floating concrete plate and the steel spring isolator, but also convert mechanical energy into electrical energy to meet the power supply needs of low-power devices in rail transit and achieve the energy conservation and emission reduction goals of green environmental protection and sustainable development.

[0040] The vibration caused by train vehicles is a clean, continuous and stable energy source, and piezoelectric energy harvesting devices have the advantages of high energy density, no electromagnetic interference, and easy to achieve small integration, which are suitable for collecting this energy. At present, the structures of relatively mature piezoelectric energy harvesting devices mainly include cymbal structure, stacked structure and cantilever beam structure. The cymbal structure and stacked structure have the characteristics of small deformation, which leads to the low electrical output power generated by their piezoelectric effect, so the energy collection effect of the first two structures directly applied to the track is not good.

[0041] In order to solve the above problems, this embodiment provides a circumferential distributed piezoelectric energy collection device applied to a track, such as Figure 1 and Figure 2 As shown in , the device includes: a box body 10, a rubber block 20 arranged in the box body 10, a pressure plate 30 arranged above the rubber block 20, and a piezoelectric module 50 arranged below the rubber block 20. In this embodiment, the piezoelectric module 50 includes a pressure ring 501 and a piezoelectric sheet 503, the pressure ring 501 is located below the rubber block 20, the piezoelectric sheet 503 is located below the pressure ring 501, and the piezoelectric sheet 503 is arranged around the box body 10 in a circumferential distribution. When the pressure plate 30 presses the rubber block 20 downward due to pressure from above, the pressure ring 501 presses the piezoelectric sheet 503 downward to generate voltage. In this embodiment, since the piezoelectric sheets 503 are arranged around the box body 10 in a circumferential distribution, the number of piezoelectric sheets used per unit area can be increased, thereby improving the piezoelectric power output and the energy collection efficiency is higher.

[0042] The housing 10 in this embodiment can be configured as a cylindrical housing 10, and the piezoelectric sheets 503 can be disposed on the outer periphery of the cylindrical housing 10. Therefore, the piezoelectric sheets 503 are radially distributed, which is more conducive to energy collection.

[0043] Specifically, the piezoelectric module 50 in this embodiment further includes a shaft 502, the pressure plate 30, the rubber block 20 and the pressure ring 501 are all sleeved on the shaft 502, and the shaft 502 is provided with a support block 40, and the support block 40 is located below the rubber block 20. In specific implementation, threaded holes 5021 are provided on the pressure plate 30 and the top of the shaft 502 in this embodiment, and screws 5022 are provided in the threaded holes 5021, and the pressure plate 30 is fixed to the shaft 502 by the screws 5022. The rubber block 20 is provided with a first through hole, the support block 40 is provided with a second through hole, and the threaded hole 5021 on the pressing plate 30 is aligned with the central axis of the first through hole on the rubber block 20 and the second through hole on the support block 40. The rubber block 20 is non-fixedly connected with the shaft 502 through the first through hole, and the support block 40 is non-fixedly connected with the shaft 502 through the second through hole. Therefore, the pressing plate 30 and the support block 40 are both fixed on the shaft 502. When a load acts on the pressing plate 30, the rubber block 20 is squeezed and deformed downward by the pressing plate 30. When the load disappears, the rubber block 20 relaxes and drives the pressing plate 30 to move upward, thereby restoring the position of the pressing plate 30. When the pressing plate 30 moves, the shaft 502 also moves, which drives the pressure ring 501 on the shaft 502 to squeeze the piezoelectric sheet 503, thereby generating a voltage.

[0044] Furthermore, the piezoelectric sheet 503 in this embodiment is configured as a cantilever beam, and the piezoelectric sheet 503 includes a substrate, an upper piezoelectric sheet 503 arranged above the substrate, and a lower piezoelectric sheet 503 arranged below the substrate; the upper piezoelectric sheet 503 and the lower piezoelectric sheet 503 are electrically connected in double-layer series, and have opposite polarization directions, so that the total output voltage and total output power are twice that of the single-layer piezoelectric sheet 503. The upper piezoelectric sheet 503, the lower piezoelectric sheet 503 and the middle substrate are collectively referred to as a "vibrator". The pressure ring 501 in this embodiment is provided in plurality, and is arranged at intervals on the shaft 502. When specifically configured, as Figure 3 and Figure 4As shown, the box body 10 is provided with square holes 101 around it, and a slider 504 is provided in the square hole. The slider 504 is provided with a slide groove 506, and one end of the piezoelectric sheet 503 is provided in the slide groove 506, and the other end of the piezoelectric sheet 503 is located between two adjacent pressure rings 501, thereby forming a cantilever beam piezoelectric module 50. In specific implementation, one end of the middle substrate in the piezoelectric sheet 503 in this embodiment cooperates with the slide groove 506 of the slider 504, that is, one end of the substrate is engaged in the slide groove 506 to achieve the installation between the piezoelectric sheet 503 and the slider 504. The piezoelectric sheet 503 in this embodiment is installed by means of the slide groove 506, which is easy to operate and can also realize the detachability of the piezoelectric sheet 503. In another implementation method, the piezoelectric sheet 503 in this embodiment can also be distributed in multiple layers in the height direction, as shown in FIG. Figure 3 As shown in the figure, the square holes 101 on the box body 10 are arranged in a stepped manner, that is, a plurality of square holes 101 are arranged in the height direction, and a slider 504 and a piezoelectric sheet 503 are arranged in each square hole 101, so that more piezoelectric sheets 503 are distributed in the circumferential direction, and each piezoelectric sheet 503 is arranged between two adjacent pressure rings 501, thereby further improving the piezoelectric power output of the entire device. The slider 504 in this embodiment is also provided with a wiring groove and a wire hole 505, as shown in FIG. Figure 4 As shown in the figure, the wires of the piezoelectric module 50 are uniformly led out from the inside of the cylindrical box 10 through the wiring groove and the wire hole 505, so as to facilitate the subsequent connection with the processing circuit and the power load. Figure 5 As shown in the figure, the floating concrete slab is squeezed by the train wheel set, and at the same time, the floating concrete slab squeezes the pressing plate 30 to move downward. The pressing plate 30 drives the shaft 502 to move downward, and the pressing ring 501 on the shaft 502 squeezes the cantilever beam piezoelectric sheet 503. Due to the positive piezoelectric effect of the piezoelectric material, charges with opposite polarities are generated on the upper and lower surfaces of the piezoelectric sheet 503, so that voltage is formed on the upper and lower surfaces of the piezoelectric sheet 503.

[0045] The energy collection device of this embodiment further includes a pad 60, such as Figure 1 and Figure 2 As shown in the figure, the cushion block 60 is installed at the bottom of the box body 10, and the bottom surface of the cushion block 60 is flush with the bottom surface of the cylindrical box body 10. The thickness of the cushion block 60 is greater than the thickness of the bottom of the box body. The shaft rod 502 is placed on the cushion block 60, which can play the role of raising the shaft rod 502 and facilitate the positioning of the shaft rod 502. When the energy collection device is installed, the cushion block 60 is removed to provide space for the shaft rod 502 to move downward when the pressure plate 30 is pressed downward.

[0046] In addition, this embodiment also simulates the displacement deformation and output voltage of the energy collection device composed of rubber blocks 20 with different structures after being squeezed by a load using the multi-physics field simulation software COMSOL Multiphysics. Figure 6 , Figure 7 and Figure 8 As shown, Figure 6 The energy collection device is composed of two rubber blocks 20 with different structures. Figure 6 In the figure a, an energy device is composed of rubber blocks 20 with a gap structure, and in the figure b, an energy device is composed of rubber blocks 20 without a gap structure. Figure 7 It can be seen from the figure that the displacement deformation of the pressure ring 501 and the piezoelectric sheet 503 of the energy collection device composed of the rubber block 20 with a gap structure is greater than that of the energy collection device composed of the rubber block 20 with no gap structure; the displacement deformation of the piezoelectric sheet 503 is also greater than that of the corresponding rubber block 20 with a gap structure, that is, it is more conducive to the output of electric energy; Figure 8 It can be seen that the output voltage peak value of the energy collection device composed of the rubber block 20 with a gap structure is much greater than that of the energy collection device composed of the rubber block 20 without a gap structure, which is about 6 times. This embodiment also simulates different contact lengths between the pressure ring 501 and the piezoelectric sheet 503 (the contact lengths are 0.5, 1.5, 2.5, and 3.5 mm, respectively) using the multi-physics simulation software COMSOL Multiphysics. Fig. 9 and Fig.10 as shown in . Fig.10 (a) is a schematic diagram of applying the same load at different contact lengths; Fig.10 (b) is a schematic diagram of the output voltage at different contact lengths. Fig.10 It can be concluded that the output voltage is negatively correlated with the contact length, that is, when the contact length is 0.5 mm, the output voltage is the largest (1.5 times that of 3.5 mm). Reducing the contact length can not only effectively improve the electrical output of the energy collector, but also reduce the end surface stress of the piezoelectric sheet 503, which is beneficial to prolong the life of the piezoelectric sheet 503. Fig.11 shown.

[0047] Based on the above embodiments, the present invention also provides an energy collection method for a circumferentially distributed piezoelectric energy collection device applied to a track, such as Fig.12 As shown in , the energy collection method comprises the following steps:

[0048] Step S100, when the train wheel set travels over the track in which the circumferential distributed piezoelectric energy harvesting device applied to the track is buried, the extrusion plate moves downward under the action of the train load;

[0049] Step S200, the pressure plate squeezes the rubber block to drive the shaft rod to move downward, so that the pressure ring on the shaft rod squeezes the piezoelectric sheet. When the train wheelset leaves, the load effect disappears. Under the elastic restoring force of the rubber block, the rubber block relaxes and drives the pressure plate to move upward, which plays a role in restoring the positions of the pressure plate and the pressure ring. The piezoelectric sheet vibrates in a cantilever beam manner and generates voltage.

[0050] Step S300: After being rectified, filtered, and stabilized, the generated electric energy is collected in a supercapacitor of a subsequent circuit to meet the power supply requirements of low-power devices in rail transit.

[0051] The specific application description of the energy collection method in this embodiment has been described in the above embodiments and will not be repeated here.

[0052] In summary, the present invention discloses a circumferentially distributed piezoelectric energy collection device and method for rails, the device comprising: a housing, a rubber block arranged in the housing, a pressure plate arranged above the rubber block, and a piezoelectric module arranged below the rubber block; the piezoelectric module comprises a pressure ring and a piezoelectric sheet, the pressure ring is located below the rubber block; the piezoelectric sheet is located below the pressure ring, and the piezoelectric sheet is arranged around the housing in a circumferential distribution, when the pressure plate presses the rubber block downward due to pressure from above, the pressure ring presses the piezoelectric sheet downward to generate voltage. The present invention can increase the number of piezoelectric sheets used per unit area by arranging the piezoelectric sheets around the housing in a circumferential distribution, thereby increasing the piezoelectric power output and achieving higher energy collection efficiency.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circumferentially distributed piezoelectric energy harvesting device applied to a track, characterized in that: The device comprises a box body, a rubber block arranged in the box body, a pressure plate arranged above the rubber block, and a piezoelectric module arranged below the rubber block; The piezoelectric module comprises: A pressure ring, the pressure ring is located below the rubber block; A piezoelectric sheet, the piezoelectric sheet is located below the pressure ring, and the piezoelectric sheets are arranged around the box body in a circumferential distribution. When the pressure plate is pressed downward by the rubber block due to pressure from above, the pressure ring presses the piezoelectric sheet downward to generate voltage; The box body is configured as a cylindrical box body, and the piezoelectric sheet is configured around the outer periphery of the cylindrical box body; The piezoelectric module further includes a shaft, the pressure plate and the pressure ring are fixedly connected to the shaft, and the rubber block is non-fixedly sleeved on the shaft. When the pressure plate presses the rubber block downward due to pressure from above, the shaft drives the pressure ring to press the piezoelectric sheet downward to generate voltage. The shaft rod is also provided with a support block, the support block is located below the rubber block, and the support block is non-fixedly sleeved on the shaft rod; The rubber block is provided with a first through hole, and the rubber block is non-fixedly sleeved with the shaft rod through the first through hole; The piezoelectric sheet comprises a substrate, an upper piezoelectric sheet arranged above the substrate, and a lower piezoelectric sheet arranged below the substrate; the upper piezoelectric sheet and the lower piezoelectric sheet are electrically connected in double-layer series, and have opposite polarization directions.

2. The circumferentially distributed piezoelectric energy harvesting device for rails according to claim 1, characterized in that: Threaded holes are arranged on the pressing plate and on the top of the shaft rod, screws are arranged in the threaded holes, and the pressing plate is fixed to the shaft rod by the screws.

3. The circumferentially distributed piezoelectric energy harvesting device for rails according to claim 1, characterized in that: The support block is provided with a second through hole, and the support block is non-fixedly sleeved with the shaft rod through the second through hole.

4. The circumferentially distributed piezoelectric energy harvesting device for rails according to claim 3, characterized in that: There are multiple pressure rings, which are arranged at intervals on the shaft; the box body is provided with a stepped square hole, a slider is provided in the square hole, a slide groove is provided on the slider, one end of the piezoelectric sheet is provided in the slide groove, and the other end of the piezoelectric sheet is located between two adjacent pressure rings.

5. The circumferentially distributed piezoelectric energy harvesting device for rails according to claim 4, characterized in that: The sliding block is also provided with a wiring groove and a wire hole.

6. An energy collection method based on the circumferential distributed piezoelectric energy collection device applied to a track according to any one of claims 1 to 5, characterized in that: The method comprises: When the train wheel set travels over the track in which the circumferential distributed piezoelectric energy collection device applied to the track is buried, the extrusion plate moves downward under the action of the train load; The pressure plate squeezes the rubber block to drive the shaft rod downward, so that the pressure ring on the shaft rod squeezes the piezoelectric sheet. When the train wheelset leaves, the load effect disappears. Under the elastic restoring force of the rubber block, the rubber block relaxes and drives the pressure plate upward, which plays a role in restoring the position of the pressure plate and the pressure ring. The piezoelectric sheet vibrates in a cantilever beam manner and generates voltage. The generated electric energy is rectified, filtered, and stabilized before being collected in supercapacitors in subsequent circuits to meet the power supply needs of low-power devices in rail transit.

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