Broadband vibration control and energy collection integrated device

Abstract

The invention discloses a broadband vibration control and energy collection integrated device. The device comprises a shell; the mass block is arranged in the shell and can reciprocate in the vertical direction; one end of the damper is connected to the inner top wall of the shell, and the other end of the damper is connected to the mass block; the elastic assembly comprises two transverse elastic pieces arranged on the two opposite sides of the mass block, each transverse elastic piece extends in the horizontal direction, and the two ends of each transverse elastic piece are connected with the inner side wall of the shell and the mass block respectively; the triboelectric energy collection module is arranged on the lower surface of the mass block and comprises a plurality of arched friction units which are arranged in the vertical direction and are connected in series; and the rectification and load circuit module is electrically connected with the triboelectric energy collection module. According to the device, the arched friction unit is triggered to contact and separate output energy through inertia response of the mass block, and vibration control and energy collection collaboration in a broadband vibration environment is achieved in cooperation with a Duffing type nonlinear elastic tuning and damping energy dissipation path.

Description

Technical Field

[0001] The present invention relates to the technical field of structural vibration control and energy harvesting integration, and in particular to a broadband vibration control and energy harvesting integrated device. Background Art

[0002] In modern civil infrastructure, industrial equipment, and smart city structures, structural vibration control is a key technology for ensuring safe service. Furthermore, the mechanical energy embodied in structural vibration can be used as a distributed energy source to power IoT sensing devices. Therefore, integrated devices that combine vibration control and energy harvesting have become a key development direction.

[0003] Traditional vibration control devices, such as tuned mass dampers (TMDs), often use linear springs for frequency tuning. These devices rely on tuning a linear stiffness system, are effective only for specific frequencies, lack adaptability to variations in the frequency of environmental excitations, and have limited response capabilities to complex dynamic characteristics such as frequency drift and multimodal coupling present in real-world structural excitations, resulting in insufficient tuning robustness. For energy harvesting, mainstream technologies such as electromagnetic, piezoelectric, and electrostatic methods struggle to balance low-frequency response with structural compatibility. Electromagnetic methods require high-speed excitation, piezoelectric methods are prone to brittle cracking and aging, and electrostatic methods have low output power. To overcome these shortcomings, the emerging nano-triboelectric generator (TENG) has shown great potential in vibration energy harvesting. Based on the triboelectric effect and electrostatic induction principle generated during the contact-separation process between materials, TENGs exhibit unique advantages in the low-frequency, small-amplitude environments typical of civil engineering (0.1-5 Hz, amplitude ≤10 cm). They can output high voltages, making them suitable for powering low-power electronic systems. They are widely available in materials, have a simple and low-cost structure, and offer a long service life, flexible construction, and strong scalability.

[0004] However, most current TENG-based energy harvesting systems still exist in the form of modular isolated units, failing to be deeply coupled with the structural vibration control mechanism, and have the following limitations: the TENG and structural control modules are arranged independently and cannot share the vibration energy transmission path. The overall structure is large, inconvenient to lay out, the mechanical path is fragmented, and the integration is low; energy harvesting and structural control are separated, and vibration energy cannot be efficiently and synergistically transferred between control and harvesting, resulting in low collaborative efficiency between the two, and the inability to enhance each other's functions, reducing the overall energy efficiency density and engineering practicality; there is a lack of frequency adaptive control mechanism for broadband vibration environments, and the energy harvesting efficiency and control effect are easily affected by frequency drift. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an integrated device for broadband vibration control and energy harvesting.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by one embodiment of the present invention is as follows:

[0007] A broadband vibration control and energy harvesting integrated device, comprising:

[0008] shell;

[0009] a mass block, disposed in the housing and capable of reciprocating in a vertical direction;

[0010] a damper, one end of the damper being connected to the inner top wall of the housing, and the other end of the damper being connected to the mass block;

[0011] an elastic component comprising two transverse elastic members disposed on opposite sides of the mass block, each of the transverse elastic members extending in a horizontal direction, and having two ends of each transverse elastic member respectively connected to the inner side wall of the housing and the mass block;

[0012] a triboelectric energy harvesting module, disposed on the lower surface of the mass block, the triboelectric energy harvesting module comprising a plurality of arched friction units disposed in a vertical direction and connected in series;

[0013] The rectifier and load circuit module is electrically connected to the friction electric energy harvesting module and is disposed inside the housing.

[0014] As a further improvement of the present invention, the mass block is located in the middle of the shell, and the mass block is made of Q235 steel or stainless steel.

[0015] As a further improvement of the present invention, the transverse elastic member includes at least one transverse elastic metal strip or at least one spring.

[0016] As a further improvement of the present invention, the transverse elastic member includes a plurality of transverse elastic metal strips or a plurality of springs, and the plurality of transverse elastic metal strips or the plurality of springs are arranged in parallel in the horizontal direction or stacked in the vertical direction.

[0017] As a further improvement of the present invention, each of the arched friction units includes a first arched friction part and a second arched friction part, the bending directions of the first arched friction part and the second arched friction part are opposite, the first arched friction part includes a first arched metal elastic sheet, and the second arched friction part includes a second arched metal elastic sheet and two flexible film layers arranged on opposite sides of the second arched metal elastic sheet.

[0018] As a further improvement of the present invention, the topmost first arched friction member is connected to the lower surface of the mass block, and the middle portion of the first arched friction member of the adjacent arched friction unit is connected to the middle portion of the second arched friction member.

[0019] As a further improvement of the present invention, a gap is provided between the first arched friction member and the second arched friction member of each arched friction unit, and a gap is provided between the end of the first arched friction member and the end of the second arched friction member of adjacent arched friction units.

[0020] As a further improvement of the present invention, the first arched metal elastic sheet and the second arched metal elastic sheet are both made of silicon manganese steel, beryllium copper or stainless steel, and the flexible film layer is made of polytetrafluoroethylene, polyimide or polyacrylonitrile.

[0021] As a further improvement of the present invention, at least two guide rails are provided in the housing, the guide rails extend in a vertical direction, pulleys are installed at both ends of the mass block, and the pulleys cooperate with the guide rails to form a rolling guide structure.

[0022] As a further improvement of the present invention, the rectification and load circuit module includes a rectification circuit, a filtering and voltage stabilization module and an energy storage module electrically connected in sequence, and the rectification circuit is electrically connected to the topmost arch friction unit and the bottommost arch friction unit respectively.

[0023] The beneficial effects of the present invention are:

[0024] (1) The device of the present invention generates geometric nonlinearity in vertical motion through a transverse elastic member, realizes the Duffing stiffness characteristic, and broadens the tuning frequency bandwidth. At the same time, by constructing a nano-friction layer composed of an arched elastic metal plate and a negatively charged flexible film layer, an energy conversion path with micro-amplitude, broadband, and high-voltage output is realized. The integrated device deeply integrates the triboelectric energy harvesting mechanism with the structural nonlinear control system, which can not only achieve robust structural response control under low-frequency broadband excitation, but also synchronously harvest vibration energy, and has more efficient, more compact, and more intelligent system characteristics.

[0025] (2) The present invention realizes low-resistance vertical motion of the mass block by cooperating with the pulley and the guide rail, thereby improving the stability of the contact path and the efficiency of nano-friction power generation.

[0026] (3) The mass block of the present invention drives elastic response, energy collection and energy consumption processes simultaneously in a single channel, thereby improving synergistic efficiency.

[0027] (4) The device of the present invention is overall miniaturized and has a high degree of structural integration. It is suitable for complex working conditions such as the inner cavity of bridge box girders, tunnel linings, track beds, wind towers, etc. and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A front view of a preferred embodiment of the present invention;

[0030] Figure 2 A side view of a preferred embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a rectifier and load circuit module according to a preferred embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of a preferred embodiment of the present invention installed in a bridge main beam;

[0033] Figure 5 A schematic diagram of the working process of vibration control and energy harvesting according to a preferred embodiment of the present invention;

[0034] In the figure: 1. Shell, 11. Rubber shock-absorbing gasket, 12. Guide rail, 2. Mass block, 3. Damper, 4. Triboelectric energy harvesting module, 41. Arched friction unit, 411. First arched friction member, 412. Second arched friction member, 4111. First arched metal elastic sheet, 4121. Second arched metal elastic sheet, 4122. Flexible film layer, 5. Rectification and load circuit module, 6. Transverse elastic member, 61. Transverse elastic metal strip, 7. Pulley, 81. Bridge main beam, 82. Anchor assembly. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0036] See also Figure 1 、 Figure 2The present application discloses an integrated broadband vibration control and energy harvesting device, comprising a housing 1, a mass 2, a damper 3, an elastic component, a triboelectric energy harvesting module 4, and a rectifier and load circuit module 5. The mass 2 is disposed within the housing 1 and is capable of free vertical vibration. One end of the damper 3 is connected to the inner top wall of the housing 1, and the other end is connected to the mass 2. The elastic component includes two transverse elastic members 6 disposed on opposite sides of the mass 2. Each transverse elastic member 6 extends horizontally, and the two ends of each transverse elastic member 6 are respectively connected to the inner side wall of the housing 1 and the mass 2, forming a geometrically nonlinear constraint. The triboelectric energy harvesting module 4 is disposed on the lower surface of the mass 2. The triboelectric energy harvesting module 4 includes a plurality of arched friction units 41 disposed vertically and connected in series, with a predefined gap maintained between each arched friction unit 41. The rectifier and load circuit module 5 is electrically connected to the triboelectric energy harvesting module 4 and is disposed within the housing 1.

[0037] During the vertical movement of the mass block 2, the vibration energy is dissipated through the damper 3, the structural response amplitude is suppressed, and the vibration reduction function and stability of the device are enhanced. At the same time, the vertical movement of the mass block 2 causes the transverse elastic member 6 to bend and deform, and a nonlinear restoring force is generated in the vertical direction due to the structural geometry, thereby achieving a broadened frequency response. The characteristics of this nonlinear restoring force are similar to the Duffing-type stiffness model, enabling the device to provide dynamic tuning capabilities within a wide frequency band; and during the movement of the mass block 2, the arched friction unit 41 is compressed and released, and AC power output is achieved through the arched friction unit 41; multiple arched friction units 41 are connected in series, so that the induced voltages of each arched friction unit 41 are superimposed and output in sequence, thereby improving the voltage output capability of the friction electric energy harvesting module 4, thereby improving the overall energy harvesting capacity and output stability. The device of the present invention deeply integrates the triboelectric energy harvesting mechanism with the structural nonlinear regulation mechanism. It can not only realize robust structural response control under low-frequency and broadband excitation, but also synchronously harvest vibration energy. It has high robustness, low-frequency micro-response capability and high structural integration. It is particularly suitable for vibration control and green energy harvesting demand scenarios of typical structures such as bridge cables and main beams, tunnel linings, track beds, wind towers, etc.

[0038] Preferably, the housing 1 is made of aluminum alloy. The entire housing 1 is made through an extrusion process, and reinforcing ribs and a detachable mounting panel can be provided inside the housing 1. The provision of the reinforcing ribs can ensure the structural rigidity of the housing 1, and the provision of the detachable mounting panel can improve the flexibility of the layout. It is understandable that the housing 1 can also be made of engineering composite materials. The housing 1 has corrosion resistance, dustproof and waterproof properties, and its protection level reaches IP65, which is suitable for outdoor or high-humidity environment applications. A fixed interface for installing the transverse elastic member 6, the damper 2 and the friction electric energy harvesting module 4 can be provided in advance on the inner wall of the housing 1 to realize screw connection, welding, etc. of the transverse elastic member 6, the damper 2, the friction electric energy harvesting module 4 and the inner wall of the housing 1.

[0039] The inner bottom wall of the housing 1 is provided with a rubber shock-absorbing gasket 11 for flexibly isolating and supporting the entire device on the inner wall of the structure, thereby improving the impact buffering capacity, protecting the film structure and enhancing the operational stability of the device.

[0040] Preferably, mass block 2 is located in the middle of housing 1 and is made of Q235 steel or stainless steel. It is understood that mass block 2 can also be made of other high-density metals. Mass block 2 can be configured as a monolithic or assembled structure, and the mass of mass block 2 can be adjusted according to different installation environments and requirements.

[0041] Preferably, the damper 3 is a hydraulic silicone oil damper or a magnetorheological damper, which provides an adjustable energy dissipation path.

[0042] In this embodiment, the transverse elastic member 6 includes at least one transverse elastic metal strip or at least one spring, which facilitates vibration deformation and generates an elastic restoring force under vibration deformation. When the mass block 2 moves in the vertical direction, the transverse elastic metal strip 61 undergoes nonlinear bending deformation. Due to the structural geometry, a nonlinear stiffness restoring force is more quickly introduced in the vertical direction, thereby better achieving the frequency band expansion function. In this embodiment, the transverse elastic member 6 includes multiple transverse elastic metal strips 61, which are stacked in the vertical direction to collaboratively generate a nonlinear restoring force. It is understood that the multiple transverse elastic metal strips 61 can be arranged in parallel in the horizontal direction, or the transverse elastic member 6 includes multiple springs, which are arranged in parallel in the horizontal direction or stacked in the vertical direction.

[0043] Preferably, the transverse elastic member 6 is made of silicon manganese steel sheet or spring steel sheet. It is understandable that the transverse elastic member 6 can also be made of other highly elastic metal materials.

[0044] Each arched friction unit 41 comprises a first arched friction member 411 and a second arched friction member 412. The first and second arched friction members 411, 412 curve in opposite directions, forming a contact-and-separation motion pair. The first arched friction member 411 comprises a first arched metal elastic sheet 4111, while the second arched friction member 412 comprises a second arched metal elastic sheet 4121 and two flexible film layers 4122 disposed on opposite sides of the second arched metal elastic sheet 4121. During motion, the mass 2 compresses and releases the first and second arched friction members 411, 412. During contact and separation, electrons transfer from the metal layer to the film layer due to the difference in electron affinity between the materials, generating surface charge pairs. After the first and second arched friction members 411, 412 separate, a potential difference acts on the second arched metal elastic sheet 4121, driving electrons to flow back and forth along an external circuit, generating AC output.

[0045] The first arched friction member 411 and the second arched friction member 412 are both arched, which can enhance the elastic recovery ability of periodic contact-separation: the arched structure naturally presents a pre-curvature when not under force, and has the ability to store initial deformation energy; during the contact process, the arched structure is flattened to store elastic potential energy, and automatically rebounds and resets when separated, realizing a fast and complete contact-separation cycle, with a higher response rate, lower fatigue damage, and better contact consistency; secondly, it has a lower initial contact trigger force: the top of the arched structure contacts first, and surface contact can be triggered under extremely small displacement, so that nano-friction power generation can still be triggered under micro-vibration excitation, which is suitable for low-frequency and micro-amplitude working conditions, such as bridge cables, wind towers, track plates and other structures; thirdly, it can improve the charge transfer efficiency: the arched structure is accompanied by a certain degree of sliding contact during the compression-rebound process, which promotes a more even distribution of friction charges on the contact surface, increases the friction charge density per unit cycle, and enhances the output voltage amplitude and current density. In addition, flexible film layers 4122 are provided on opposite sides of the second arched metal elastic sheet 4121 to achieve double-sided contact power generation during the movement of the mass block 2, thereby improving the energy output frequency and power density.

[0046] The present invention preferably connects the topmost first arched friction member 411 to the lower surface of the mass block 2, and the middle portion of the first arched friction member 411 of the adjacent arched friction unit 4 is connected to the middle portion of the second arched friction member 412. The first arched friction member 411 is connected to the mass block 2 to form a controllable contact force loading path, ensuring the consistency of the contact-separation behavior and improving the energy conversion efficiency. The adjacent arched friction units 4 are connected at the top of the arch rib and are in a continuous contact state. Preferably, the first arched friction member 411 can be connected to the mass block 2 by screwing, welding, bonding, snapping or elastic support. Both ends of the first arched friction member 411 and both ends of the second arched friction member 412 are mounted on the inner wall of the housing 1 and can be fixed by screwing, slot embedding, elastic limiting or structural gluing to ensure that they form a stable periodic contact-separation path under the action of the mass block 2.

[0047] A gap is provided between the first arched friction member 411 and the second arched friction member 412 of each arched friction unit 41. A gap is also provided between the ends of the first arched friction member 411 and the ends of the second arched friction member 412 of adjacent arched friction units 41. This initial gap facilitates periodic contact and separation, thereby driving triboelectric charge transfer and voltage output.

[0048] Preferably, the multiple arched friction units 41 are connected in series by welding wires, flexible circuits or metal busbars.

[0049] The first arched metal elastic sheet 4111 and the second arched metal elastic sheet 4121 are both made of a conductive material with a positive charge tendency in the triboelectric series, serving as the triboelectric positive layer. The flexible film layer 4122 is made of a material with a negative charge tendency in the triboelectric series, serving as the triboelectric negative layer. Specifically, the first arched metal elastic sheet 4111 and the second arched metal elastic sheet 4121 are both made of silicon-manganese steel, beryllium copper, or stainless steel. The flexible film layer 4122 is made of polytetrafluoroethylene, polyimide, or polyacrylonitrile.

[0050] To improve the motion stability and mechanical efficiency of mass 2 during its vertical response, prevent lateral swing and tilt under strong excitation or long-term operation, and thus ensure the accuracy and stability of nonlinear elastic tuning and triboelectric contact paths, at least two guide rails 12 are preferably provided within housing 1. Guide rails 12 extend vertically, and pulleys 7 are mounted at both ends of mass 2. These pulleys 7 cooperate with guide rails 12 to form a rolling guide structure. Pulleys 7 move vertically along guide rails 12, reducing friction, suppressing lateral swing, and improving the accuracy of the vertical inertial response of mass 2. Two guide rails 12 are provided within housing 1, corresponding to the left and right sides of mass 2. These two guide rails 12 are arranged in a front-to-back direction. Four pulleys 7 are provided on each side of mass 2. These four pulleys 7 are divided into two groups, spaced vertically apart. Each group includes two pulleys 7, and each group of pulleys 7 moves up and down along its corresponding guide rail 12 by rolling. The pulleys 7 provide low-resistance guidance, ensuring sensitive response even under low-amplitude vibration excitation. Guide rail 12 can be provided with a guide groove, into which pulley 7 fits, achieving the triple functions of position limiting, anti-sway, and precision guidance. Guide rail 12 is constructed of aluminum alloy or polyoxymethylene composite rails. Pulley 7 is preferably mounted to the side of mass 2 via ball bearings. Pulley 7 is preferably made of wear-resistant nylon or stainless steel, and may optionally include an oil groove or magnetic position limiting mechanism. This guide structure offers low overall weight, high guiding precision, and strong adaptability, making it suitable for stable installation and operation in confined environments such as the interior of bridge structures.

[0051] Preferably, the rectifier and load circuit module 5 is arranged on the inner side wall of the housing 1. Figure 3 As shown, the rectification and load circuit module 5 includes a rectification circuit, a filtering and voltage stabilizing module and an energy storage module which are electrically connected in sequence. The rectification circuit is electrically connected to the top arch friction unit 41 and the bottom arch friction unit 41 respectively. Preferably, the rectification circuit is a rectifier bridge, and the input ends of the rectifier bridge are respectively connected to the second arch metal elastic sheet 4121 of the top arch friction unit 41 and the second arch metal elastic sheet 4121 of the bottom arch friction unit 41, so as to rectify the AC voltage output by the friction electric energy harvesting module 4 into pulsating DC power. The filtering part of the filtering and voltage stabilizing module can adopt a filtering capacitor which is connected in parallel to the output ends of the rectifier bridge to eliminate high-frequency ripple and smooth the output voltage. The voltage stabilizing part can adopt a low voltage difference linear regulator such as LDO, or a three-terminal regulator such as AMS1117 to output a stable DC voltage. The energy storage module can be a super capacitor C, or an energy storage device such as a battery. Load R L It is the energy usage terminal of the entire energy collection chain, which determines the final flow and application target of the electric energy after triboelectric output, rectification, filtering and voltage stabilization. out The output terminal is connected to the load and can power low-power devices such as wireless sensors, micro Bluetooth modules, and signal processors.

[0052] In actual engineering applications, the device is installed at a location where the structural vibration response is significant. When the main structure vibrates after being stimulated by external factors, the device moves with the structure. The internal mass block 2 vibrates relative to the shell 1 due to inertial lag, effectively utilizing the main structure's own vibration excitation as the excitation source to achieve multifunctional coupling of vibration reduction, energy harvesting, and sensor power supply, and has the deployability and scalability of engineering applications. Figure 4 As shown, the device is deployed within a bridge girder 81. Specifically, to enhance device installation stability, the device housing 1 is preferably secured to the interior of the bridge girder 81 via anchoring assemblies 82. It is understood that the device is not limited to being secured within a bridge girder; it can also be deployed within typical structures such as subway track slabs, tunnel lining segments, industrial equipment bases, or wind towers.

[0053] When the main structure is stimulated by external forces and vibrates, driving the assembly to move, the vibration energy input to mass block 2 is "diverted" through two paths. First, the movement of mass block 2 forms a structural damping energy dissipation path through damper 3 and transverse elastic member 6. Damper 3 converts a portion of the vibration kinetic energy into heat for dissipation. Transverse elastic member 6 provides a broadband adaptive restoring force through nonlinear deformation, achieving system stiffness tuning and response stability control.

[0054] On the other hand, during its movement, the mass 2 continuously drives the first arched friction member 411 and the second arched friction member 412 of the triboelectric energy harvesting module 4 to cycle in contact and separation, causing the surface of the triboelectric energy harvesting module 4 to periodically establish and release charge pairs, thereby driving electrons to flow along the rectifier and load circuit module 5 through the action of the electric field, completing the conversion of mechanical energy into electrical energy. This multi-path collaborative mechanism ensures that part of the input vibration energy is actively collected and converted into electrical energy, while part is effectively dissipated to control the structural response, achieving the coupling and complementarity between vibration control and energy harvesting, and meeting the dual engineering goals of structural safety and energy self-sufficiency. Figure 5 As shown in the figure, its working process includes the following three parts:

[0055] (1) Nonlinear tuning response process (frequency regulation mechanism)

[0056] The mass block 2 is connected to the housing 1 through the transverse elastic members on both sides, presenting a geometrically nonlinear configuration. When the mass block 2 is subjected to the vertical displacement x(t), the transverse elastic members undergo nonlinear stretching, generating a nonlinear restoring force F s (x), the force can be approximately expressed as:

[0057] F s (x)=k1x+k3x 3

[0058] in:

[0059] k1 is the linear stiffness coefficient;

[0060] k3 is the nonlinear cubic stiffness term, which is determined by the geometric parameters of the metal strip and the boundary constraints;

[0061] x is the relative vertical displacement of mass block 2.

[0062] This nonlinear term introduces Duffing-type dynamic behavior, making the system's equivalent natural frequency no longer fixed but dynamically changing with the amplitude, thereby achieving broadband tuning capability. The frequency response function of the nonlinear system exhibits multistability and jump characteristics, adapting to frequency drift excitation environments.

[0063] (2) Triboelectric energy harvesting process (TENG contact-separation power generation)

[0064] The triboelectric energy harvesting module 4 repeatedly contacts and separates under the periodic vibration of the mass 2. Its energy conversion relies on the accumulation of triboelectric charges and electrostatic induction processes. The output voltage can be approximately expressed as:

[0065]

[0066] in:

[0067] σ is the triboelectric charge density per unit area;

[0068] ε0 is the dielectric constant of vacuum;

[0069] d p is the thickness of the film material;

[0070] ε r is the dielectric constant of the film.

[0071] (3) System energy dissipation and coupling mechanism (multi-path energy flow distribution)

[0072] The total input vibration energy E of the system in It can be expressed as the external excitation force F ext(t) The work done on the displacement x(t) of the mass block:

[0073]

[0074] The energy is distributed in the system as follows:

[0075] E in =E damp +E TENG +E rest

[0076] is the energy dissipated by the damper 3, where c is the damping coefficient;

[0077] The energy output by the triboelectric energy harvesting module 4 and entering the load;

[0078] E rest Store / rebound energy for the system.

[0079] This energy conservation relationship reflects the device's ability to synergistically transform structural vibration energy through multiple paths.

[0080] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0081] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A broadband vibration control and energy harvesting integrated device, characterized in that: include: shell; a mass block, disposed in the housing and capable of reciprocating in a vertical direction; a damper, one end of the damper being connected to the inner top wall of the housing, and the other end of the damper being connected to the mass block; an elastic component comprising two transverse elastic members disposed on opposite sides of the mass block, each of the transverse elastic members extending in a horizontal direction, and having two ends of each transverse elastic member respectively connected to the inner side wall of the housing and the mass block; a triboelectric energy harvesting module, disposed on the lower surface of the mass block, the triboelectric energy harvesting module comprising a plurality of arched friction units disposed in a vertical direction and connected in series; The rectifier and load circuit module is electrically connected to the friction electric energy harvesting module and is disposed inside the housing.

2. The broadband vibration control and energy harvesting integrated device according to claim 1, characterized in that: The mass block is located in the middle of the shell and is made of Q235 steel or stainless steel.

3. The broadband vibration control and energy harvesting integrated device according to claim 1, characterized in that: The transverse elastic member includes at least one transverse elastic metal strip or at least one spring.

4. The broadband vibration control and energy harvesting integrated device according to claim 3, characterized in that: The transverse elastic member includes a plurality of transverse elastic metal strips or a plurality of springs, and the plurality of transverse elastic metal strips or the plurality of springs are arranged in parallel along the horizontal direction or stacked along the vertical direction.

5. The broadband vibration control and energy harvesting integrated device according to claim 1, characterized in that: Each of the arched friction units includes a first arched friction member and a second arched friction member, the bending directions of the first arched friction member and the second arched friction member are opposite, the first arched friction member includes a first arched metal elastic sheet, and the second arched friction member includes a second arched metal elastic sheet and two flexible film layers arranged on opposite sides of the second arched metal elastic sheet.

6. The broadband vibration control and energy harvesting integrated device according to claim 5, characterized in that: The uppermost first arched friction member is connected to the lower surface of the mass block, and the middle portion of the first arched friction member of the adjacent arched friction unit is connected to the middle portion of the second arched friction member.

7. The broadband vibration control and energy harvesting integrated device according to claim 5, characterized in that: A gap is formed between the first arched friction member and the second arched friction member of each arched friction unit, and a gap is formed between ends of the first arched friction member and ends of the second arched friction member of adjacent arched friction units.

8. The broadband vibration control and energy harvesting integrated device according to claim 5, characterized in that: The first arched metal elastic sheet and the second arched metal elastic sheet are both made of silicon manganese steel, beryllium copper or stainless steel, and the flexible film layer is made of polytetrafluoroethylene, polyimide or polyacrylonitrile.

9. The broadband vibration control and energy harvesting integrated device according to claim 1, characterized in that: At least two guide rails are provided in the housing, and the guide rails extend in a vertical direction. Pulleys are installed at both ends of the mass block, and the pulleys cooperate with the guide rails to form a rolling guide structure.

10. The broadband vibration control and energy harvesting integrated device according to claim 1, characterized in that: The rectification and load circuit module includes a rectification circuit, a filtering and voltage stabilization module, and an energy storage module that are electrically connected in sequence. The rectification circuit is electrically connected to the uppermost arched friction unit and the lowermost arched friction unit respectively.

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