Vibration damping devices, wall panels, and mechanical equipment based on Mikaelian lenses

Abstract

This utility model discloses a vibration damping device, wall panel, and mechanical equipment based on a Mikaelian lens. The vibration damping device based on a Mikaelian lens includes: a conformal self-focusing lens; a vibration damping element disposed on a portion of the conformal self-focusing lens corresponding to at least one wave focus; and / or an energy harvesting element disposed on a portion of the conformal self-focusing lens corresponding to at least one wave focus. Thus, by disposing of the vibration damping element and / or the energy harvesting element on the portion of the conformal self-focusing lens corresponding to at least one wave focus, or on a portion of the conformal self-focusing lens adjacent to at least one wave focus, the vibration damping element can suppress vibrations transmitted to the conformal self-focusing lens, and the energy harvesting element can collect and utilize the vibrational energy transmitted to the conformal self-focusing lens.

Description

Technical Field

[0001] This utility model relates to the field of vibration reduction technology, and in particular to a vibration reduction device, wall panel and mechanical equipment based on a Mikaelian lens. Background Technology

[0002] Vibration and noise are common in mechanical and electrical equipment in many fields such as aerospace, shipbuilding, automobiles, rail vehicles, and electronics. The amplitude and spectral characteristics of various physical quantities in vibration and noise are important indicators for measuring the comfort, concealment, and design level of the aforementioned mechanical and electrical equipment.

[0003] Vibration reduction and noise reduction are mainly divided into two categories: active control and passive control. Active control is based on the principle of wave phase cancellation interference. It uses an actuator to emit an inverse wave with the same amplitude but opposite phase as the vibration noise signal, so that the inverse wave cancels out the original wave, thus reducing vibration and noise. However, after the introduction of electronic devices, active control technology will make the system complex and expensive, and may bring stability and reliability problems.

[0004] Passive control primarily relies on the physical properties of materials and structures to block, absorb, and dissipate vibration and noise energy. It offers advantages such as simplicity, low cost, and no need for additional energy. For example, measures like adjusting the natural frequency by changing structural geometry or increasing panel thickness to improve stiffness can achieve vibration reduction. However, these methods are often limited by structural design space, mass constraints, and material properties, making it difficult to meet the demand for highly efficient vibration reduction. Furthermore, acoustic black holes (ABHs), as a novel passive control vibration reduction and noise reduction technology, use specific structural or material parameter designs to gradually slow wave propagation, eventually concentrating in a certain area and being effectively absorbed and dissipated. This has attracted widespread attention from scholars both domestically and internationally. However, acoustic black holes have only a single focal point, and their vibration reduction is limited by a cutoff frequency. Therefore, the vibration reduction effect is poor below the cutoff frequency, and the vibration reduction frequency range is small, resulting in low efficiency in practical applications and hindering widespread adoption. Utility Model Content

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a vibration damping device based on a Mikaelian lens, which has better vibration damping and energy harvesting effects.

[0006] This utility model further proposes a wall panel for mechanical equipment.

[0007] This utility model further proposes a mechanical device.

[0008] According to an embodiment of the present invention, a vibration reduction device based on a Mikaelian lens includes: the conformal self-focusing lens having at least two wavefoci spaced apart along its length, and the expression for the refractive index distribution of the conformal self-focusing lens is:

[0009]

[0010] Where, n z This is the refractive index of a standard Mikel lens, n w (r) is the refractive index of the conformal self-focusing lens, with constants n0 = 1.55 and r a =1.1, l=0.15, A=1, r is the distance from the origin O; a damping element, the damping element being disposed at the portion of the conformal self-focusing lens corresponding to at least one of the wave focal points, and / or the damping element being disposed at the portion of the conformal self-focusing lens adjacent to at least one of the wave focal points; or an energy harvesting element, the energy harvesting element being disposed at the portion of the conformal self-focusing lens corresponding to at least one of the wave focal points, and / or the energy harvesting element being disposed at the portion of the conformal self-focusing lens adjacent to at least one of the wave focal points.

[0011] Therefore, at least two spaced wave focal points can achieve precise focusing of the vibration wave source transmitted to the conformal self-focusing lens. Vibration damping and / or energy harvesting components are provided in the portion of the conformal self-focusing lens corresponding to at least one wave focal point, or in the portion of the conformal self-focusing lens adjacent to at least one wave focal point. The vibration damping components can suppress the vibration transmitted to the conformal self-focusing lens, and the energy harvesting components can collect the vibration energy transmitted to the conformal self-focusing lens and utilize it for other purposes. With this arrangement, on the one hand, the conformal self-focusing lens can not only dampen sound waves of different frequencies, but also has a high damping efficiency for sound waves. On the other hand, the conformal self-focusing lens can cleverly utilize the energy of vibration, which can reduce the energy consumption of the mechanical equipment used in the vibration damping device based on the Mikaelian lens.

[0012] In some examples of this utility model, the damping element is a damping adhesive, which is bonded to the conformal self-focusing lens.

[0013] In some examples of this utility model, there are multiple vibration damping elements, a portion of which is disposed at the portion of the conformal self-focusing lens corresponding to each of the wave focal points, and another portion of which is disposed at the portion of the conformal self-focusing lens adjacent to each of the wave focal points.

[0014] In some examples of this utility model, the energy harvesting element is a piezoelectric element, which is bonded to the conformal self-focusing lens to convert the mechanical energy of vibration into electrical energy.

[0015] In some examples of this utility model, there are multiple energy harvesting elements, a portion of which is disposed at the portion of the conformal self-focusing lens corresponding to each of the wave focal points, and another portion of which is disposed at the portion of the conformal self-focusing lens adjacent to each of the wave focal points.

[0016] In some examples of this utility model, the central angle corresponding to the arc-shaped conformal self-focusing lens is 4φ. The two ends of the conformal self-focusing lens are set as the first end and the second end, respectively. When a wave enters the conformal self-focusing lens from the first end, the conformal self-focusing lens has two wave focal points. In the direction extending from the first end to the second end, the two wave focal points are the first wave focal point and the second wave focal point in sequence. The central angle corresponding to the portion of the conformal self-focusing lens from the first end to the first wave focal point is φ; and / or the central angle corresponding to the portion of the conformal self-focusing lens from the first end to the second wave focal point is 3φ.

[0017] The wall panel of the mechanical equipment according to an embodiment of the present utility model includes: a wall panel body; and the aforementioned vibration damping device based on a Mikaelian lens, wherein the vibration damping device based on a Mikaelian lens is disposed on the wall panel body, or...

[0018] The wall panel body is provided with the vibration damping device based on the Mikaelian lens, and the vibration damping device based on the Mikaelian lens is an integrally formed structural component with the wall panel body.

[0019] The mechanical device according to an embodiment of the present invention includes: a wall panel of the mechanical device; and an electrical device, wherein the electrical device is electrically connected to the energy harvesting element of the vibration damping device based on the Mikaelian lens.

[0020] Beneficial effects:

[0021] This invention involves conformally transforming a traditional Mikaelian lens and arranging them periodically. This not only enables wave self-focusing but also alters the trajectory and shape of the incident wave. Furthermore, vibration damping and energy harvesting components can dissipate the focused portion of the wave, thereby blocking the tendency of the vibration wave to continue propagating along its original direction.

[0022] Moreover, the conformal Mikaelian lens of this invention has multiple focal points and can perform multiple self-focusing operations. With a sufficiently long lens, it is theoretically possible to achieve infinite self-focusing. In this way, vibration reduction through multiple focal areas can achieve higher vibration reduction efficiency, suppressing vibration and harvesting energy more fully.

[0023] Furthermore, unlike vibration reduction methods that use damping components, this invention uses piezoelectric sheets attached to the focal point and its surrounding area to convert mechanical energy into electrical energy, thereby achieving energy transfer and collection. This suppresses vibration and powers other low-power sensors, avoiding the limitations of external power supply. Thus, this vibration reduction device not only improves the dissipation of vibration energy but also powers the sensors, enhancing the independence and applicability of the entire system.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is a schematic diagram of a vibration reduction device based on a Mikaelian lens according to an embodiment of the present invention;

[0027] Figure 2 This is a partial schematic diagram of the mechanical equipment according to an embodiment of the present utility model;

[0028] Figure 3 This is a comparison diagram of the output voltage of the piezoelectric element with and without a conformal self-focusing lens according to an embodiment of this utility model;

[0029] Figure 4 This is a graph showing the thickness and refractive index of a conformal self-focusing lens as a function of distance, according to an embodiment of the present invention.

[0030] Figure 5 This is a graph showing the change in lens thickness as a function of distance for a conformal self-focusing lens according to an embodiment of the present invention.

[0031] Figure label:

[0032] 1000, wall panels;

[0033] 100. Vibration damping device based on Mikaelian lens;

[0034] 10. Conformal self-focusing lens; 11. Wave focal point; 12. Inner diameter side; 13. Outer diameter side;

[0035] 20. Vibration damping components;

[0036] 30. Energy harvesting components;

[0037] 40. Sensor; 41. Wire. Detailed Implementation

[0038] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0039] The following is for reference. Figures 1-5 The present invention describes a vibration damping device 100 based on a Mikaelian lens according to an embodiment of the present invention. The vibration damping device 100 based on a Mikaelian lens can be disposed on a wall panel 1000 of a mechanical device. The wall panel 1000 of the mechanical device can be applied to the mechanical device, wherein the mechanical device can be a small household appliance, a renewable energy power generation device, a high-speed rail device, an aerospace device, or other equipment that generates vibration during normal operation.

[0040] Combination Figures 1-5 As shown, the vibration damping device 100 based on the Mikaelian lens according to this utility model mainly includes: a conformal self-focusing lens 10, a vibration damping element 20, and an energy harvesting element 30. The conformal self-focusing lens has at least two wavefoci spaced apart along its length. The expression for the refractive index distribution of the conformal self-focusing lens is:

[0041]

[0042] Where nz is the refractive index of a standard Mikel lens, and n w (r) is the refractive index of the conformal self-focusing lens, with constants n0 = 1.55, ra = 1.1, l = 0.15, and A = 1, and r is the distance from the wave focal point 11 to the origin O.

[0043] The damping element 20 is disposed on the portion of the conformal self-focusing lens 10 corresponding to at least one wave focus 11, and / or the damping element 20 is disposed on the portion of the conformal self-focusing lens 10 adjacent to at least one wave focus 11, and the energy harvesting element 30 is disposed on the portion of the conformal self-focusing lens 10 corresponding to at least one wave focus 11, and / or the energy harvesting element 30 is disposed on the portion of the conformal self-focusing lens 10 adjacent to at least one wave focus 11.

[0044] Specifically, the conformal self-focusing lens 10 is arc-shaped, with O as the origin of the coordinate system. The conformal self-focusing lens 10 is composed of a sector AOC minus a sector BOD and the addition of arc-shaped structures on both sides. The central angle of the sector is 4φ. Points E and F are the positions of the wave focal points 11 when the vibration wave is incident directly from end AB. The angles between the two wave focal points 11 and the Y-axis are φ and 3φ, respectively. The distances between the two wave focal points 11 and the origin O are both r = (OA + OB) / 2.

[0045] It should be noted that in the test example of this utility model, the radius AO is 1.1977m and the radius BO is 0.9862m.

[0046] When the vibration damping device 100 based on the Mikaelian lens is installed on the wall panel 1000, the phase velocity of the bending wave in the wall panel 1000 is:

[0047]

[0048] Among them, the Young's modulus, mass density, and Poisson's ratio of panel 1000 are represented by E, ρ, and v, respectively, and ω represents the angular frequency.

[0049] Therefore, the refractive index of the curved lens is primarily defined by the thickness of the panel 1000:

[0050]

[0051] Among them, the thickness of the wall panel 1000 is h0 = 4mm.

[0052] Therefore, the thickness h of the vibration damping device 100 based on the Mikaelian lens is obtained as follows:

[0053]

[0054] The width of the vibration damping device 100 based on the Mikaelian lens is W = AO - BO = 0.2115m. The arc-shaped structure on the left is obtained by creating an elliptical surface perpendicular to OB, tangent to point B, and located in the positive direction of the Z-axis, stretching it from B to A along the thickness curve, and then performing a difference operation between the stretched structure and the wall panel 1000 structure.

[0055] Specifically, the length of the semi-axis of the ellipse parallel to the xy plane is 0.1m, and the length of the semi-axis perpendicular to the xy plane is 0.75m. The same logic applies to the arc structure on the right.

[0056] Figure 4 The curves reflecting the changes in thickness and refractive index of the conformal self-focusing lens 10 with distance reveal the relationship between the two as a function of distance. Figure 5 The thickness distribution diagram of the conformal self-focusing lens 10 reflects the change in lens thickness with distance, showing that the thickness is the same at the same radius distance.

[0057] With this configuration, the two sides of the arc-shaped conformal self-focusing lens 10 in the width direction are designated as the inner diameter side 12 and the outer diameter side 13, respectively. In the direction extending from the inner diameter side 12 to the outer diameter side 13, the refractive index of the conformal self-focusing lens 10 can be increased first and then decreased. The refractive index of the inner diameter side 12 is greater than that of the outer diameter side 13. The maximum refractive index of the conformal self-focusing lens 10 is designated as the maximum refractive index part, which is located in the middle of the width direction of the conformal self-focusing lens 10 and is closer to the inner diameter side 12. Furthermore, the conformal self-focusing lens 10 has at least two wave focal points 11 spaced apart in the length direction. This allows the conformal self-focusing lens 10 to focus sound waves and also has a deflection waveguide effect while focusing, that is, it can change the trajectory and shape of the incident wave.

[0058] Thus, the sound wave is repeatedly focused and diverged in the conformal self-focusing lens 10. The conformal self-focusing lens 10 can automatically focus the incident wave to a specific point through gradient refractive index distribution or metasurface phase control, without the need for mechanical adjustment. It should be noted that the width direction of the conformal self-focusing lens 10 is also the radial direction of the arc-shaped conformal self-focusing lens 10.

[0059] In some embodiments of this utility model, the conformal self-focusing lens 10 has at least two spaced-apart wave focal points 11. In some embodiments of this utility model, the conformal self-focusing lens 10 can achieve self-focusing of the vibration wave transmitted to the conformal self-focusing lens 10 at the wave focal point 11. The vibration damping member 20 is disposed on the part of the conformal self-focusing lens 10 corresponding to at least one wave focal point 11. The vibration damping member 20 can dampen the focused vibration wave. Since the vibration at the wave focal point 11 is large, the vibration damping member 20 can have a better damping effect on the vibration wave on the conformal self-focusing lens 10, which can improve the vibration damping performance of the conformal self-focusing lens 10.

[0060] In some other embodiments of the present invention, the damping element 20 is disposed on a portion of the conformal self-focusing lens 10 adjacent to at least one wave focal point 11.

[0061] Specifically, it should be noted that in this embodiment, at least two wave focal points 11 are the focal points of the vibration wave when it is incident perpendicularly from one end of the conformal self-focusing lens 10. Since the waveform of the vibration wave is complex in practical applications, it usually contains both normally incident and obliquely incident waves. Furthermore, the focal point of the obliquely incident wave will slightly shift relative to the wave focal points 11 in this embodiment. Therefore, with a portion of the multiple damping adhesives positioned at the portion of the conformal self-focusing lens 10 corresponding to each wave focal point 11, another portion of the multiple damping adhesives is positioned at the portion of the conformal self-focusing lens 10 adjacent to each wave focal point 11, forming an array. This makes the vibration damping of the damping adhesive more comprehensive and better meets the needs of practical applications. A normally incident wave is a vibration wave that is incident perpendicularly to the end of the conformal self-focusing lens 10.

[0062] In some embodiments of this utility model, the energy harvesting element 30 is disposed on the portion of the conformal self-focusing lens 10 corresponding to at least one wave focus 11, and the energy harvesting element 30 is disposed on the portion of the conformal self-focusing lens 10 adjacent to at least one wave focus 11. The energy harvesting element 30 can collect the larger vibration energy at the wave focus 11, and can convert the mechanical energy of the vibration into other energy, and play other roles. For example, the energy harvesting element 30 can collect the larger vibration energy at the wave focus 11 and convert it into electrical energy, thereby providing power to other electrical equipment.

[0063] Furthermore, the energy harvesting component 30 can not only collect the large vibration energy at the wave focal point 11, but also play a role in vibration reduction, thereby improving the vibration reduction performance of the conformal self-focusing lens 10.

[0064] Specifically, it should be noted that in this embodiment of the present invention, at least two wave focal points 11 are the focal points of the vibration wave when it is incident directly from one end of the conformal self-focusing lens 10. Since the waveform of the vibration wave is relatively complex in practical applications, it usually contains both directly incident and obliquely incident waves, and the focal position of the obliquely incident wave will be slightly offset relative to the wave focal points 11 of this embodiment of the present invention, under the premise that a portion of the multiple piezoelectric sheets is set in the portion of the conformal self-focusing lens 10 corresponding to each wave focal point 11, another portion of the multiple piezoelectric sheets is set in the portion of the conformal self-focusing lens 10 adjacent to each wave focal point 11, thus constructing an array, thereby making the piezoelectric sheets utilize vibration energy more comprehensively and improving the utilization effect of vibration energy in practical applications.

[0065] It should be noted that a damping element 20 and an energy harvesting element 30 can be simultaneously provided in the portion of the conformal self-focusing lens 10 corresponding to at least one wave focal point 11. This can further improve the damping performance of the conformal self-focusing lens 10 while enabling the conformal self-focusing lens 10 to collect and utilize vibration energy.

[0066] Therefore, at least two spaced wave focal points 11 can achieve precise focusing of the vibration wave source transmitted to the conformal self-focusing lens 10. Vibration damping element 20 and / or energy harvesting element 30 are provided in the portion of the conformal self-focusing lens 10 corresponding to at least one wave focal point, or vibration damping element 20 and / or energy harvesting element 30 are provided in the portion of the conformal self-focusing lens 10 adjacent to at least one wave focal point 11. Vibration damping element 20 can suppress the vibration transmitted to the conformal self-focusing lens 10, and energy harvesting element 30 can collect the vibration energy transmitted to the conformal self-focusing lens 10 and utilize it for other purposes. With this arrangement, on the one hand, the conformal self-focusing lens 10 can not only dampen sound waves of different frequencies, but also has a high vibration damping efficiency. On the other hand, the conformal self-focusing lens 10 can cleverly utilize the energy of vibration, which can reduce the energy consumption of the mechanical equipment used in the vibration damping device based on the Mikaelian lens.

[0067] In some embodiments of this invention, the damping element 20 is a damping adhesive, which is bonded to the portion of the conformal self-focusing lens 10 corresponding to at least one wave focal point 11. By using a damping adhesive as the damping element 20 and bonding it to the portion of the conformal self-focusing lens 10 corresponding to at least one wave focal point 11, not only is the damping performance of the adhesive in reducing vibration waves guaranteed, but the installation of the adhesive on the conformal self-focusing lens 10 is also simpler, more direct, and more stable and secure. Furthermore, the damping adhesive has a lower cost, which can reduce the cost of the vibration damping device 100 based on the Mikaelian lens.

[0068] Furthermore, the conformal self-focusing lens 10 is provided with damping adhesive on the portion corresponding to each wave focal point 11, which can further improve the vibration reduction performance of the conformal self-focusing lens 10. In addition, the damping adhesive has a low cost and is simple and straightforward to install on the conformal self-focusing lens 10.

[0069] In some embodiments of this utility model, there are multiple vibration damping elements 20. A portion of the multiple vibration damping elements 20 is bonded to the portion of the conformal self-focusing lens 10 corresponding to each wave focal point 11, and another portion of the multiple vibration damping elements 20 is bonded to the portion of the conformal self-focusing lens 10 adjacent to each wave focal point 11. This can further improve the vibration damping performance of the conformal self-focusing lens 10.

[0070] Combination Figure 2 As shown, the energy harvesting component 30 is a piezoelectric component, which is bonded to the part of the conformal self-focusing lens 10 corresponding to the wave focal point 11, so as to convert the mechanical energy of vibration into electrical energy.

[0071] Specifically, by setting the energy harvester 30 as a piezoelectric element, the piezoelectric element can convert the mechanical energy of vibration into electrical energy to supply other electrical devices. This not only cleverly utilizes the vibrational energy on the conformal self-focusing lens 10, thereby improving energy utilization efficiency, but also makes the installation of the piezoelectric element on the conformal self-focusing lens 10 simpler, more direct, and more stable and secure. Furthermore, the piezoelectric element has a lower cost, which can reduce the cost of the vibration damping device 100 based on the Mikaelian lens.

[0072] In some embodiments of this utility model, there are multiple energy harvesting elements 30. A portion of the multiple energy harvesting elements 30 is disposed in the portion of the conformal self-focusing lens 10 corresponding to each wave focal point 11, and another portion of the multiple energy harvesting elements 30 is disposed in the portion of the conformal self-focusing lens 10 adjacent to each wave focal point 11. This can further improve the vibration reduction performance of the conformal self-focusing lens 10.

[0073] In some embodiments of this utility model, the conformal self-focusing lens 10 is provided with a piezoelectric element at the portion corresponding to each wave focal point 11. This can further improve the vibration reduction performance of the conformal self-focusing lens 10. In addition, the piezoelectric element has a low cost and is simple and direct to install on the conformal self-focusing lens 10.

[0074] It should be noted that the conformal self-focusing lens 10 of this application can self-focus the incoming vibration wave at least twice. In the embodiments of this utility model, if the arc of the conformal self-focusing lens 10 is long enough, it can even achieve infinite self-focusing, which can make the vibration reduction and energy harvesting efficiency higher, the vibration reduction and energy harvesting more sufficient, and the operating frequency band is not limited.

[0075] Figure 3 The diagram shows: the red line represents the output voltage of the piezoelectric element when it is positioned at the focal point 11 of the conformal self-focusing lens 10 on the wall panel 1000, and the blue line represents the output voltage of the piezoelectric element when it is positioned at the focal point of the wall panel 1000 without the conformal self-focusing lens 10. It is clearly evident that the output voltage is significantly enhanced when the conformal self-focusing lens 10 is present.

[0076] Combination Figure 1As shown, the central angle corresponding to the arc-shaped conformal self-focusing lens 10 is 4φ. The two ends of the conformal self-focusing lens 10 are set as the first end and the second end, respectively. When a wave enters the conformal self-focusing lens 10 from the first end, the conformal self-focusing lens 10 has two wave focal points 11. In the direction extending from the first end to the second end, the two wave focal points 11 are the first wave focal point 11 and the second wave focal point 11, respectively. The central angle corresponding to the part of the conformal self-focusing lens 10 from the first end to the first wave focal point 11 is φ; and / or the central angle corresponding to the part of the conformal self-focusing lens 10 from the first end to the second wave focal point 11 is 3φ.

[0077] Combination Figure 2 As shown, the wall panel 1000 of the mechanical equipment according to this utility model can mainly include: a wall panel body and the above-mentioned vibration damping device 100 based on the Mikaelian lens. In some embodiments of this utility model, the vibration damping device 100 based on the Mikaelian lens can be disposed on the wall panel body. This can improve the vibration damping performance of the wall panel 1000 body and reduce the overall vibration of the mechanical equipment, while facilitating the maintenance and disassembly of the vibration damping device 100 based on the Mikaelian lens.

[0078] In some other embodiments of this utility model, by controlling the distribution of specific materials on the surface of the wall panel body material, processing it to form a conformal structure, namely a conformal self-focusing lens 10, the wall panel body and the vibration damping device 100 based on the Mikaelian lens can be integrated into a single structural component. This not only facilitates the installation of the vibration damping device 100 based on the Mikaelian lens on the wall panel body, but also improves the overall stability.

[0079] The mechanical device according to this utility model mainly includes: a wall panel 1000 and an electrical device. The electrical device is electrically connected to the energy harvesting component 30 of the vibration damping device 100 based on the Mikaelian lens. This allows the energy harvesting component 30 of the vibration damping device 100 based on the Mikaelian lens on the wall panel 1000 to collect vibration energy, convert it into electrical energy, and supply the electrical energy to the electrical device for normal operation.

[0080] It should be noted that the power supply device can be sensor 40, and sensor 40 is electrically connected to the piezoelectric sheet through wire 41. The energy harvesting element 30 on the vibration damping device 100 based on the Mikaelian lens can meet the long-term monitoring needs of sensor 40.

[0081] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0083] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vibration damping device based on a Mikaelian lens, characterized in that, include: A conformal self-focusing lens, wherein the conformal self-focusing lens is curved and arc-shaped, and has at least two wavefoci spaced apart along its length, and the refractive index n of the conformal self-focusing lens is... w (r) satisfies the following distribution relationship: Where, n z It is the refractive index of a traditional Mikaelian lens, n w (r) is the refractive index of the conformal self-focusing lens, with constants n0 = 1.55 and r a =1.1, l=0.15, A=1, and r is the distance from the origin O; A vibration damping element is disposed on a portion corresponding to at least one of the wave focal points of the conformal self-focusing lens, and / or the vibration damping element is disposed on a portion of the conformal self-focusing lens adjacent to at least one of the wave focal points; or An energy harvesting element for converting vibrational mechanical energy into electrical energy, the energy harvesting element being disposed at a portion of the conformal self-focusing lens corresponding to at least one of the wave focal points, and / or the energy harvesting element being disposed at a portion of the conformal self-focusing lens adjacent to at least one of the wave focal points.

2. The vibration reduction device based on a Mikaelian lens according to claim 1, characterized in that, The damping component is a damping adhesive, which is bonded to the conformal self-focusing lens.

3. The vibration reduction device based on a Mikaelian lens according to claim 2, characterized in that, There are multiple vibration damping elements, a portion of which is disposed at the portion of the conformal self-focusing lens corresponding to each of the wave focal points, and another portion of which is disposed at the portion of the conformal self-focusing lens adjacent to each of the wave focal points.

4. The vibration reduction device based on a Mikaelian lens according to claim 1, characterized in that, The energy harvesting element is a piezoelectric element, which is bonded to the conformal self-focusing lens to convert the mechanical energy of vibration into electrical energy.

5. The vibration reduction device based on a Mikaelian lens according to claim 4, characterized in that, The energy harvesting element is a plurality of elements, a portion of which is disposed at the portion of the conformal self-focusing lens corresponding to each of the wave focal points, and another portion of which is disposed at the portion of the conformal self-focusing lens adjacent to each of the wave focal points.

6. The vibration reduction device based on a Mikaelian lens according to claim 1, characterized in that, The central angle corresponding to the arc-shaped conformal self-focusing lens is 4φ. The two ends of the conformal self-focusing lens are set as the first end and the second end, respectively. When a wave enters the conformal self-focusing lens from the first end, the conformal self-focusing lens has two wave focal points. In the direction extending from the first end to the second end, the two wave focal points are the first wave focal point and the second wave focal point in sequence. The central angle corresponding to the portion of the conformal self-focusing lens from the first end to the first wave focal point is φ; and / or the central angle corresponding to the portion of the conformal self-focusing lens from the first end to the second wave focal point is 3φ.

7. A wall panel for a mechanical device, characterized in that, include: siding body; The vibration damping device based on a Mikaelian lens according to any one of claims 1-6, wherein the vibration damping device based on a Mikaelian lens is disposed on the wall panel body, or The wall panel body is provided with the structure of the vibration damping device based on the Mikaelian lens, and the vibration damping device based on the Mikaelian lens is an integrally formed structural component with the wall panel body.

8. A mechanical device, characterized in that, include: The wall panel is the wall panel of the mechanical equipment as described in claim 7; The electrical device is electrically connected to the energy harvesting element of the vibration damping device based on the Mikaelian lens.

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