A piezoelectric ceramic thin film power generation device and a gunsight having the same

Abstract

This application relates to a piezoelectric ceramic thin-film power generation device and a sight having the same. The thin-film power generation device includes: a housing having a cavity for accommodating internal components; a piezoelectric power generation component disposed inside the housing, converting mechanical energy into electrical energy; and an energy management module disposed inside the housing and electrically connected to the piezoelectric power generation component. The piezoelectric power generation component includes a flexible piezoelectric thin film and a flexible electrode layer, which are alternately stacked to form a multi-layer stacked structure. At least one counterweight is disposed between the multi-layer stacked structure and the inner wall of the housing, and a buffer pad is disposed at the end away from the counterweight, abutting against the inner wall of the housing. The projections of the counterweight and the buffer pad partially overlap in the axial direction of the housing. This application utilizes piezoelectric power generation technology to convert the recoil impact energy generated by firing a shooting device into electrical energy, providing a self-powered, highly reliable, and miniaturized piezoelectric power generation device.

Description

Technical Field

[0001] This application relates to the field of thin-film power generation and aiming device technology, specifically to a piezoelectric ceramic thin-film power generation device and an aiming device having the same. Background Technology

[0002] Current shooting devices primarily rely on solar panels and traditional batteries for power supply. Solar power, which converts sunlight into electricity through the photovoltaic effect, is significantly affected by environmental conditions. Specifically, in low-light conditions such as cloudy or rainy weather, dawn, or dusk, the output power of the solar panels drops drastically, failing to meet the normal operating requirements of the sight. In concealed environments or low-light scenarios such as jungle shooting, indoor tactical training, or nighttime operations, the solar panels may even fail completely, causing a power outage. Furthermore, the solar panels must be exposed on top of the sight to receive sunlight, which not only increases the risk of detection but also occupies valuable space that could be used to mount other tactical accessories.

[0003] On the other hand, while traditional battery power supply is not limited by light conditions, it suffers from limited endurance, the need for regular replacement or charging, reduced electrochemical activity at low temperatures leading to severe performance degradation, and limited storage life. Especially under extreme climatic conditions, the reliability of traditional batteries further declines, failing to meet the practical needs of long-term continuous use in battlefield environments.

[0004] Therefore, improving the environmental adaptability and continuous working capability of the sight to meet the long-term stable use requirements in various complex scenarios has become an urgent problem to be solved. Summary of the Invention

[0005] To address the technical challenge of improving the environmental adaptability and continuous operation of the aiming device, and to meet the requirements for long-term stable use in various complex scenarios, this application aims to provide a piezoelectric ceramic thin-film power generation device and an aiming device incorporating the same. The specific technical solution adopted is as follows: In a first aspect, embodiments of this application provide a piezoelectric ceramic thin-film power generation device, comprising: The housing has cavities for accommodating internal components; A piezoelectric power generation component, disposed inside the housing, is used to convert mechanical energy into electrical energy; An energy management module is disposed inside the housing and electrically connected to the piezoelectric power generation component; The piezoelectric power generation component includes at least one flexible piezoelectric film and at least one flexible electrode layer, wherein the flexible piezoelectric film and the flexible electrode layer are alternately stacked to form a multi-layer stacked structure; At least one counterweight is provided between the multi-layer stacked structure and the inner wall of the shell. A buffer pad is provided at the end of the multi-layer stacked structure away from the counterweight, and the buffer pad abuts against the inner wall of the shell. The projection of the counterweight mass block and the projection of the buffer pad overlap at least partially in the axial direction of the housing, and the ratio of the area of ​​the overlapping area to the projected area of ​​the buffer pad in the axial direction of the housing is 20% to 80%. The thicknesses of the flexible piezoelectric film and the flexible electrode layer are gradient-distributed along the axial direction. The thickness of the flexible piezoelectric film located in the middle of the axial direction is greater than the thickness of the flexible piezoelectric film located at both ends of the axial direction, and the thickness of the flexible electrode layer located in the middle of the axial direction is less than the thickness of the flexible electrode layer located at both ends of the axial direction.

[0006] In some embodiments, the piezoelectric power generation component further includes an upper end electrode layer and a lower end electrode layer: The end electrode layer is disposed at the axial top end of the multi-layer stacked structure, and the side of the end electrode layer facing the counterweight mass block abuts against the counterweight mass block; The lower end electrode layer is disposed at the axial bottom end of the multilayer stacked structure, and the side of the lower end electrode layer facing the buffer pad abuts against the buffer pad; Both the upper end electrode layer and the lower end electrode layer are electrically connected to the outermost flexible electrode layer in the multilayer stacked structure; The outer diameters of the upper end electrode layer and the lower end electrode layer are both larger than the outer diameter of the multilayer stacked structure, so as to form a radial extension for connecting external lead wires.

[0007] In some embodiments, both the upper end electrode layer and the lower end electrode layer are multilayer composite film structures, and the multilayer composite film structure comprises, from the inside out: A metal bonding layer is electrically connected to the outermost flexible electrode layer in the multilayer stacked structure; A stress buffer layer is stacked on the outer surface of the metal adhesive layer; A wear-resistant contact layer is stacked on the outer surface of the stress buffer layer to form a contact surface with the counterweight block or the buffer pad.

[0008] In some embodiments, the number of layers in the multilayer stacked structure includes 5 to 30 layers, and a flexible electrode layer is sandwiched between each two adjacent flexible piezoelectric films, and the two outermost layers are both flexible electrode layers. The total thickness of the multi-layer stacked structure includes 50~300 mm. m, and a radial gap of 0.5~2mm is formed between the outer peripheral surface of the multi-layer stacked structure and the inner wall of the shell.

[0009] In some embodiments, the energy management module includes a rectifier unit, an energy storage unit, and a voltage regulator unit: The input terminal of the rectifier unit is electrically connected to the flexible electrode layer of the piezoelectric power generation component, and is used to convert the alternating current output by the piezoelectric power generation component into direct current. The input terminal of the energy storage unit is electrically connected to the output terminal of the rectifier unit, and is used to store rectified electrical energy; The input terminal of the voltage regulator unit is electrically connected to the output terminal of the energy storage unit, and the output terminal of the voltage regulator unit is used to provide a stable DC voltage to the external load.

[0010] In some embodiments, the energy management module further includes a status monitoring unit: The status monitoring unit is electrically connected to the energy storage unit and the voltage regulator unit respectively, and the status monitoring unit includes a voltage sampling circuit, a current sampling circuit and a communication interface; The voltage sampling circuit is connected in parallel with the energy storage unit and is used to collect the terminal voltage of the energy storage unit; The current sampling circuit is connected in series with the energy storage unit and is used to collect the charging and discharging current of the energy storage unit. The communication interface is electrically connected to the voltage sampling circuit and the current sampling circuit respectively, and is used to output the state of charge and health status information of the energy storage unit to external devices.

[0011] In some embodiments, the counterweight mass block includes a main mass body, a pressure-bearing boss, a guide ring, and a limiting retaining ring: The pressure-bearing boss is located at one end of the main mass body facing the multi-layer stacked structure and abuts against the multi-layer stacked structure; The guide ring is sleeved on the outer peripheral surface of the main mass body and slides in fit with the inner wall of the shell. The limiting ring is fixed to the inner wall of the housing and is located on the side of the main mass body away from the multi-layer stacked structure, forming an axial gap with the main mass body.

[0012] In some embodiments, the inner wall of the housing is provided with at least one set of axial guide grooves, the axial guide grooves being slidably engaged with the guide ring, and the axial guide grooves being used to restrict the counterweight mass block from moving along the axial direction of the housing; The inner wall of the axial guide groove is coated with at least one layer of self-lubricating and wear-resistant coating.

[0013] In some embodiments, the buffer pad includes an elastic matrix and a stress-dispersing layer disposed on the side of the elastic matrix facing the multilayer stacked structure. The elastic matrix is ​​fixedly connected to the inner wall of the housing, and the stress-dispersing layer abuts against the central region of the end face of the multilayer stacked structure.

[0014] Secondly, embodiments of this application provide a targeting device, including the piezoelectric ceramic thin film power generation device mentioned above.

[0015] The embodiments of this application have at least the following beneficial effects: This application utilizes a multi-layered stacked structure, formed by alternating layers of flexible piezoelectric films and flexible electrode layers, to power a firing device's sight. It generates electricity using the recoil vibration produced when the firing device is fired, completely eliminating the sight's dependence on external light. Even in tactical scenarios where solar panels are inoperable, such as rainy weather, nighttime shooting, or jungle cover, this application can still stably generate power, achieving self-sustaining power supply for the sight in all weather and environments.

[0016] This application, through the design of counterweight mass blocks and buffer pads, enables the multi-layer stacked structure to undergo bending deformation rather than compression deformation upon impact. Combined with the inherent flexibility of the flexible piezoelectric film, it solves the technical problem that traditional block piezoelectric ceramics cannot withstand the instantaneous high-energy impact of shooting devices, thus meeting the long-term reliable operation requirements of the sight under repeated firing conditions.

[0017] This application solves the technical problem that piezoelectric generator output is a transient high-voltage pulse, which cannot directly power the electronic components of the sight, by rectifying, storing, and stabilizing the electrical energy output by the piezoelectric generator through an energy management module. This application realizes a complete energy chain from mechanical energy harvesting to stable electrical energy output, enabling the sight to operate independently without an external power source. It has significant advantages such as self-powered operation, high shock resistance, miniaturization, and all-weather applicability, providing a completely new technical option for the power supply of shooting devices and sights. Attached Figure Description

[0018] To more clearly illustrate the technical solutions and advantages in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a piezoelectric ceramic thin film power generation device provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of a piezoelectric power generation component provided in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of an energy management module provided in one embodiment of this application; Figure 4 This is a schematic diagram of the structure of a counterweight mass block provided in one embodiment of this application; Figure 5 This is a schematic diagram of the structure of the upper end electrode layer and the lower end electrode layer provided in one embodiment of this application; Figure 6 This is a schematic diagram of the aiming device provided in Embodiment 2 of this application; Figure 7 This is a schematic diagram of the aiming device provided in Embodiment 3 of this application; Figure 8 This is a schematic diagram of the aiming device provided in Embodiment 4 of this application; Figure 9 This is a schematic diagram of the aiming device provided in Embodiment 5 of this application.

[0020] Reference numerals: 1-Shell; 10-Cavity; 2-Piezoelectric power generation component; 20-Multi-layer stacked structure; 200-Flexible piezoelectric film; 201-Flexible electrode layer; 21-Upper end electrode layer; 22-Lower end electrode layer; 23-Radial extension; 3-Energy management module; 30-Rectifier unit; 31-Energy storage unit; 32-Voltage stabilizing unit; 33-Status monitoring unit; 4-Counterweight block; 40-Main mass body; 41-Pressure-bearing boss; 42-Guide ring; 5-Buffer pad; a-Axial top end; b-Axial bottom end; A, A1, A2-Piezoelectric ceramic film power generation device; B-Sighting device; 6-Eyepiece side; 7-Objective lens side; 8-Battery compartment; 9-Slot side; 11-Height adjustment handwheel; 12-Wind deflection handwheel; 13-Infrared emitter; 14-Brightness adjustment device. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this application to achieve the intended purpose of the invention, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation, structure, features and effects of a piezoelectric ceramic thin film power generation device and a sight having the same, based on this application.

[0022] In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0023] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0024] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0027] The following description, in conjunction with the accompanying drawings, details a specific scheme for a piezoelectric ceramic thin-film power generation device and a sight thereof provided in this application.

[0028] Example 1: Please see Figure 1 This illustrates a piezoelectric ceramic thin-film power generation device according to an embodiment of this application: Specifically, this embodiment provides a piezoelectric ceramic thin-film power generation device A, which includes a housing 1, a piezoelectric power generation component 2, and an energy management module 3. The housing 1 serves as the external support and protection structure of the device, and has a cavity 10 for accommodating internal components. All functional structures are arranged within the cavity 10 to achieve miniaturized integration and impact protection. In practical applications, the housing 1 can be made of metallic materials, such as 7075 aluminum alloy or TC4 titanium alloy. The inner wall surface of the housing 1 can be provided with an anodized layer or a micro-arc oxidation layer to improve insulation performance and corrosion resistance.

[0029] The piezoelectric power generation component 2 is disposed inside the housing 1, serving as the core power generation unit for converting mechanical energy such as external impact and vibration into electrical energy. It should be noted that the flexible piezoelectric film 200 described in this application is a flexible piezoelectric ceramic film, with piezoelectric ceramic as the main material. Through ceramic thin-film and flexible structure design, the piezoelectric ceramic maintains its high-voltage electrical conversion performance while possessing impact resistance and being shatter-resistant. The piezoelectric power generation component 2 uses piezoelectric ceramic as its core power generation functional unit, utilizing the positive piezoelectric effect of the piezoelectric ceramic to achieve the conversion of mechanical energy into electrical energy. The piezoelectric ceramic is the core functional material for power generation in this device. Specifically, the piezoelectric power generation component 2 includes at least one flexible piezoelectric film 200 and at least one flexible electrode layer 201. The flexible piezoelectric film 200 refers to a thin-film material with piezoelectric effect and bendable deformation. For example, it can be made of lead zirconate titanate (PZT), manganese-doped bismuth ferrite (bFOMn), polyvinylidene fluoride (PVDF), or copolymers thereof. The thickness of the flexible piezoelectric film 200 can be set to 0.5 micrometers to 2 micrometers, and the polarization direction is consistent along the thickness direction. The flexible electrode layer 201 refers to a thin-film electrode material with conductive properties and bendable deformation. For example, it can be made of silver nanowire network, carbon nanotube network, graphene film, or metal mesh. The thickness of the flexible electrode layer 201 can be set to 50 nanometers to 500 nanometers, and the surface sheet resistance is 0.1 ohms per square meter to 10 ohms per square meter.

[0030] Optionally, the flexible piezoelectric film 200 and the flexible electrode layer 201 are alternately stacked to form a multilayer stacked structure 20, i.e., a columnar structure formed by stacking the flexible piezoelectric film 200 and the flexible electrode layer 201 in the axial direction, to increase the power generation per unit volume and enhance the resistance to deformation. A flexible electrode layer 201 is sandwiched between each two adjacent flexible piezoelectric film layers 200, and the outermost two layers are also flexible electrode layers 201 to ensure effective charge collection and extraction. The number of layers in the multilayer stacked structure 20 can be set to 5 to 30, with a total thickness of 50 micrometers to 300 micrometers. A radial gap of 0.5 mm to 2 mm is formed between the outer peripheral surface of the multilayer stacked structure 20 and the inner wall of the housing 1. In practical applications, the radial gap can be filled with an insulating buffer medium, such as silicone or epoxy resin, to absorb radial vibrations and prevent rigid collisions between the multilayer stacked structure 20 and the housing 1.

[0031] Please see Figure 2Optionally, the thicknesses of the flexible piezoelectric film 200 and the flexible electrode layer 201 are gradient-distributed along the axial direction of the device. The thickness of the flexible piezoelectric film 200 located in the middle of the axial direction is greater than that of the flexible piezoelectric film 200 located at both ends of the axial direction, so as to improve the power generation capacity and structural strength of the middle region; the thickness of the flexible electrode layer 201 located in the middle of the axial direction is less than that of the flexible electrode layer 201 located at both ends of the axial direction, so as to ensure rapid charge discharge and reduce contact resistance in the end regions. The gradient distribution of the thicknesses of the flexible piezoelectric film 200 and the flexible electrode layer 201 along the axial direction of the device allows the multi-layer stacked structure 20 to be subjected to more uniform stress and reasonable deformation under axial impact, while taking into account power generation efficiency, structural strength and charge output capacity, significantly improving the reliability and energy conversion efficiency of the device under strong impact conditions.

[0032] Optionally, at least one counterweight block 4 is disposed between the multi-layer stacked structure 20 and the inner wall of the housing 1. The counterweight block 4 is an inertial element with a large mass, which is used to generate inertial force under impact, compressing the multi-layer stacked structure 20 to deform and thus generate electricity. Specifically, in practical applications, the counterweight block 4 can be made of high-density material, such as tungsten-nickel-iron alloy, tungsten-copper alloy, or depleted uranium alloy, with a density of 16.5 g / cm³ to 19.3 g / cm³.

[0033] Optional, please refer to Figure 4 The counterweight block 4 includes a main mass body 40, a pressure-bearing boss 41, a guide ring 42, and a limiting retaining ring. The main mass body 40 is the core structure of the counterweight, providing impact inertial force. The pressure-bearing boss 41 is located at the end of the main mass body 40 facing the multi-layer stacked structure 20 and precisely abuts against the end face of the multi-layer stacked structure 20, used to concentrate and transfer the inertial force to the central area of ​​the stacked structure, improving power generation efficiency. The guide ring 42 is sleeved on the outer peripheral surface of the main mass body 40, forming a sliding fit with the inner wall of the housing 1, ensuring that the main mass body 40 moves only along the axial direction, avoiding radial offset that would cause uneven force distribution. The limiting retaining ring is fixed to the inner wall of the housing 1 and located on the side of the main mass body 40 away from the multi-layer stacked structure 20, forming a preset axial gap with the main mass body, used to limit the maximum displacement of the main mass body 40 and prevent excessive impact from damaging the piezoelectric structure.

[0034] Optionally, to further improve the orientation and smoothness of the movement of the counterweight block 4, the inner wall of the housing 1 is provided with at least one set of axial guide grooves. The axial guide grooves extend along the axial direction of the housing 1 and form a matching sliding limit engagement with the guide ring 42 of the counterweight block 4. The axial guide grooves are used to radially limit and axially guide the guide ring 42, ensuring that the counterweight block 4 can only make linear reciprocating movements along the axial direction of the housing 1, avoiding radial sway, circumferential rotation or jamming during the impact process, thereby ensuring that the impact force is stably applied to the multi-layer stacked structure 20.

[0035] Furthermore, the inner wall surface of the axial guide groove is coated with at least one layer of self-lubricating wear-resistant coating. The self-lubricating wear-resistant coating can be cured by spraying or impregnation process to reduce the sliding friction coefficient between the guide ring and the axial guide groove, reduce wear caused by reciprocating motion, improve the motion response speed of the counterweight mass block, reduce impact noise, and significantly improve the structural stability and service life of the device under high frequency and high intensity repeated impact conditions.

[0036] Optionally, a buffer pad 5 is provided at the end of the multi-layer stacked structure 20 away from the counterweight block 4, and the buffer pad 5 abuts against the inner wall of the housing 1. The buffer pad 5 is an elastic buffer element used to provide axial support and disperse instantaneous impact stress, preventing overload damage to the piezoelectric structure. In practical applications, the buffer pad 5 can be made of elastic materials, such as silicone rubber, fluorosilicone rubber, or nitrile rubber.

[0037] Optionally, the buffer pad 5 includes an elastic matrix and a stress-dispersing layer. The elastic matrix is ​​fixedly connected to the inner wall of the housing 1, providing stable bottom support. The stress-dispersing layer is disposed on the side of the elastic matrix facing the multi-layer stacked structure 20, and abuts against the central region of the end face of the multi-layer stacked structure 20, used to evenly disperse the concentrated stress at the bottom of the multi-layer stacked structure 20 to the elastic matrix, reducing the risk of local stress overload. Through the cooperation of the elastic matrix and the stress-dispersing layer, the buffer pad 5 can effectively absorb instantaneous high-energy impacts, protect the flexible piezoelectric film 200 from being crushed, and at the same time ensure that the deformation of the power generation structure is controllable, thereby improving the overall impact resistance life of the device.

[0038] Optionally, the projection of the counterweight 4 and the projection of the buffer pad 5 overlap at least partially in the axial direction of the housing 1, so that the counterweight 4 and the buffer pad 5 form a misaligned support relationship in the axial direction. When the counterweight 4 is subjected to impact inertial force and moves axially, the multi-layer stacked structure 20 is forced to produce bending deformation rather than simple compression deformation, so that the flexible piezoelectric film 200 mainly bears bending stress rather than compressive stress, effectively avoiding the piezoelectric material from breaking under instantaneous high-energy impact.

[0039] Furthermore, the ratio of the overlapping area to the projected area of ​​the buffer pad 5 in the axial direction of the housing 1 is 20% to 80%, resulting in a misaligned support relationship between the counterweight block 4 and the buffer pad 5 in the axial direction. Upon impact, the counterweight block 4 moves axially under inertia. Since the projections of the two only partially overlap, the multi-layered stacked structure 20 is forced to undergo bending deformation rather than simple compressive deformation, thus allowing the flexible piezoelectric film to primarily bear bending stress. Compared to compressive stress, bending stress significantly reduces the destructive effect on piezoelectric materials, effectively avoiding the technical defect of traditional bulk piezoelectric ceramics being easily broken under instantaneous high-energy impacts.

[0040] When the overlap ratio is near the lower limit of 20% in this range, only about one-fifth of the area of ​​the buffer pad 5 overlaps with the projected area of ​​the counterweight block 4, resulting in a significant misalignment. The multi-layer stacked structure 20 exhibits significant bending deformation, increasing the bending strain amplitude of the flexible piezoelectric film and correspondingly increasing the peak voltage of the output power. This is suitable for shooting device applications with high recoil. When the overlap ratio is near the upper limit of 80% in this range, about four-fifths of the area of ​​the buffer pad 5 is covered, resulting in a smaller misalignment. The multi-layer stacked structure 20 exhibits primarily compressive deformation with secondary bending deformation, resulting in higher overall stiffness and a more direct energy transfer path. This is suitable for applications with lower recoil or more limited space. When the overlap ratio is 50%, the two form a semi-overlapping state. The multi-layer stacked structure simultaneously withstands the combined deformation of compression and bending, resulting in a more uniform stress distribution and comprehensively considering impact resistance, power generation efficiency, and cycle life.

[0041] This application limits the ratio of the area of ​​the overlapping region to the projected area of ​​the buffer pad 5 in the axial direction of the housing 1 to 20% to 80%, which ensures that the multi-layer stacked structure generates sufficient bending deformation to generate electricity efficiently and prevent breakage when an impact occurs, and also ensures the structural stability and long-term reliability of the device under repeated impact conditions.

[0042] Optional, please refer to Figure 5The piezoelectric power generation component 2 further includes an upper end electrode layer 21 and a lower end electrode layer 22. The upper end electrode layer 21 is disposed at the axial top end a of the multilayer stacked structure 20, and abuts against the counterweight 4 on the side facing the counterweight 4. The upper end electrode layer 21 is used to evenly distribute the pressure transmitted by the counterweight 4 onto the upper surface of the multilayer stacked structure 20 and collect the charge generated at the upper end of the multilayer stacked structure 20. The lower end electrode layer 22 is disposed at the axial bottom end b of the multilayer stacked structure 20, and abuts against the buffer pad 5 on the side facing the buffer pad 5. The lower end electrode layer 22 is used to evenly distribute the supporting force of the buffer pad 5 onto the lower surface of the multilayer stacked structure 20 and collect the charge generated at the lower end of the multilayer stacked structure 20. Both the upper end electrode layer 21 and the lower end electrode layer 22 are electrically connected to the outermost flexible electrode layer 201 of the multilayer stacked structure 20. Specifically, electrical conductivity can be achieved by bonding with conductive adhesive or by welding.

[0043] Optionally, the outer diameters of both the upper end electrode layer 21 and the lower end electrode layer 22 are larger than the outer diameter of the multilayer stacked structure 20, forming a radial extension 23 for connecting external lead wires. The radial extension 23 provides a convenient connection position for the lead electrodes, avoiding direct welding on the weak flexible electrode layer 201, thus improving the reliability and manufacturability of the device. Furthermore, both the upper end electrode layer 21 and the lower end electrode layer 22 are multilayer composite film structures, which, from the inside out, sequentially include a metal bonding layer, a stress buffer layer, and a wear-resistant contact layer.

[0044] The metal adhesive layer is electrically connected to the outermost flexible electrode layer 201 of the multilayer stacked structure 20. In practical applications, the metal adhesive layer can be made of active metals such as titanium, chromium, or nickel, with a thickness of 20 nanometers to 100 nanometers, to form a low-resistance ohmic contact with the flexible electrode layer 201. The stress buffer layer is stacked on the outer surface of the metal adhesive layer. In practical applications, the stress buffer layer can be made of nickel-vanadium alloy or nickel-chromium alloy, with a thickness of 100 nanometers to 500 nanometers, and its hardness is between that of the metal adhesive layer and the wear-resistant contact layer. It is used to absorb and disperse the impact stress transmitted by the counterweight block 4 or the buffer pad 5, preventing stress concentration from being transmitted to the multilayer stacked structure 20. The wear-resistant contact layer is stacked on the outer surface of the stress buffer layer to form a contact surface with the counterweight block 4 or the buffer pad 5. In practical applications, the wear-resistant contact layer can be made of precious metals such as gold, platinum or palladium, with a thickness of 50 nanometers to 200 nanometers, a surface roughness of less than 0.1 micrometers, and a hardness greater than that of the stress buffer layer, to withstand repeated impact wear and maintain a low coefficient of friction.

[0045] The energy management module 3 is disposed inside the housing 1 and is electrically connected to the piezoelectric power generation component 2. The energy management module 3 is used to process, store, and stabilize the electrical energy output by the piezoelectric power generation component 2, providing a stable DC voltage for external loads.

[0046] Please see Figure 3 Optionally, the energy management module 3 includes a rectifier unit 30, an energy storage unit 31, and a voltage regulator unit 32. The input terminal of the rectifier unit 30 is electrically connected to the flexible electrode layer 201 of the piezoelectric power generation component 2, and is used to convert the AC power output by the piezoelectric power generation component 2 into DC power. The rectifier unit 30 can employ a full-bridge rectifier circuit, consisting of a synchronous rectifier bridge composed of four Schottky diodes or four NMOS transistors, with a rectification efficiency greater than 90%. The input terminal of the energy storage unit 31 is electrically connected to the output terminal of the rectifier unit 30, and is used to store the rectified electrical energy. The energy storage unit 31 may include a micro supercapacitor array, composed of three to five solid-state micro supercapacitors connected in series or parallel, each solid-state micro supercapacitor having a capacitance of 10 microfarads to 100 microfarads and an equivalent series resistance of less than 0.1 ohms. The energy storage unit 31 may also be equipped with an overcharge protection circuit, connected in parallel with the micro supercapacitor array, used to bypass the charging current when the charging voltage exceeds a set threshold. The input terminal of the voltage regulator unit 32 is electrically connected to the output terminal of the energy storage unit 31. The output terminal of the voltage regulator unit 32 is used to provide a stable DC voltage to an external load. The voltage regulator unit 32 can be a step-up / step-down DC-DC converter, including a power inductor, a switching transistor, a freewheeling diode, and a feedback control loop, to convert the unstable 1.8V to 5.5V output voltage of the energy storage unit 31 into a stable 3.0V to 5.0V DC voltage, with a conversion efficiency greater than 85%.

[0047] Optionally, the energy management module 3 further includes a status monitoring unit 33. The status monitoring unit 33 is electrically connected to both the energy storage unit 31 and the voltage regulator unit 32, and is used to monitor the operating status of the energy storage unit 31 in real time. The status monitoring unit 33 includes a voltage sampling circuit, a current sampling circuit, and a communication interface. The voltage sampling circuit is connected in parallel with the energy storage unit 31 and is used to collect the terminal voltage of the energy storage unit 31. The current sampling circuit is connected in series with the energy storage unit 31 and is used to collect the charging and discharging current of the energy storage unit 31. The communication interface is electrically connected to both the voltage sampling circuit and the current sampling circuit, and is used to output the state of charge and health status information of the energy storage unit 31 to external devices. The communication interface can use standard communication protocols such as I2C, SPI, or UaRT.

[0048] It should be noted that, in practical applications, the materials, dimensions, and properties of all structures in this embodiment, such as the housing 1, the piezoelectric power generation component 2, and the energy management module 3, can be selected and adjusted according to actual needs.

[0049] The piezoelectric ceramic thin film power generation device provided in this embodiment can be applied to shooting devices. When subjected to the recoil impact of the shooting device, the counterweight block 4 moves axially under inertia, compressing the multi-layer stacked structure 20 to produce compression deformation. The flexible piezoelectric thin film 200 generates charge under deformation, which is led out to the energy management module 3 through the flexible electrode layer 201 and the end electrode layer. The rectifier unit 30 converts the pulse electricity into DC electricity, the energy storage unit 31 quickly stores electrical energy, and the voltage regulator unit 32 outputs a stable voltage. The buffer pad 5 and the gradient stacked structure jointly absorb the impact to prevent the piezoelectric layer from breaking. The status monitoring unit 33 provides real-time feedback on the energy storage status, realizing stable, reliable, and maintenance-free self-powered power supply.

[0050] Example 2: As attached Figure 6 As shown, this embodiment provides a sight B, which can be an internal red dot sight. The lower part of the sight B is the slot side 9, and a brightness adjustment device 14 (e.g., a knob-type or button-type structure) is provided on the side. In addition, the sight B is also provided with a piezoelectric ceramic thin film power generation device A. The piezoelectric ceramic thin film power generation device A is preferably located near the slot side 9. The piezoelectric ceramic thin film power generation device A can protrude from the front end of the sight B, or it can be embedded in the internal space of the piezoelectric ceramic thin film power generation device A.

[0051] The piezoelectric ceramic thin film power generation device A preferably extends along the length of the sight B. When subjected to the recoil impact of the firing device, the piezoelectric ceramic thin film power generation device A in the sight B can better absorb the impact vibration and generate electricity.

[0052] Example 3: like Figure 7 As shown, compared with Embodiment 2, the difference in this embodiment is that the aiming device B is equipped with two piezoelectric ceramic thin film power generation devices, namely piezoelectric ceramic thin film power generation device A1 and piezoelectric ceramic thin film power generation device A2.

[0053] The other contents of this embodiment are the same as those in Embodiment 1, and will not be repeated here.

[0054] Example 4: Compared with Embodiment 2, the difference in this embodiment is that, as Figure 6 As shown, the thin-film power generation device A in Embodiment 2 is generally similar to a columnar structure, such as a square column, a round column, or an elliptical column, and its dimension along the length direction of the aiming device B is greater than its dimension along the width direction of the aiming device B.

[0055] like Figure 8 As shown, in this embodiment, the thin-film power generation device A is generally similar to a sheet-like structure, and its dimension along the length direction of the aiming device B is smaller than its dimension along the width direction of the aiming device B.

[0056] The other contents of this embodiment are the same as those in Embodiment 1, and will not be repeated here.

[0057] Example 5: As attached Figure 9 As shown, this embodiment provides a sight B, including an eyepiece side 6, an objective lens side 7, a battery compartment 8, an elevation handwheel 11, a windage handwheel 12, an infrared emitter 13, and a slot side 9. The slot side 9 is used to engage with the firing device structure, and the battery compartment 8 is disposed on the slot side 9. In addition, the sight B may also include other structures required for the sight to achieve the aiming function, which will not be described further in this embodiment.

[0058] It should be noted that the aiming device B in this example also includes a piezoelectric ceramic thin film power generation device A mentioned in Embodiment 1, which is disposed on the slot side 9. Preferably, the piezoelectric ceramic thin film power generation device A is adjacent to the battery compartment 8.

[0059] It should be noted that the device provided in the above embodiments is only an example of the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the computer device can be divided into different functional modules to complete all or part of the functions described above.

[0060] It should also be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0061] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. The processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0062] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0063] The above description is only a specific implementation of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A piezoelectric ceramic thin-film power generation device, characterized in that, include: The housing has cavities for accommodating internal components; A piezoelectric power generation component, disposed inside the housing, is used to convert mechanical energy into electrical energy; An energy management module is disposed inside the housing and electrically connected to the piezoelectric power generation component; The piezoelectric power generation component includes at least one flexible piezoelectric film and at least one flexible electrode layer, wherein the flexible piezoelectric film and the flexible electrode layer are alternately stacked to form a multi-layer stacked structure; At least one counterweight is provided between the multi-layer stacked structure and the inner wall of the shell. A buffer pad is provided at the end of the multi-layer stacked structure away from the counterweight, and the buffer pad abuts against the inner wall of the shell. The projection of the counterweight mass block and the projection of the buffer pad overlap at least partially in the axial direction of the housing, and the ratio of the area of ​​the overlapping area to the projected area of ​​the buffer pad in the axial direction of the housing is 20% to 80%. The thicknesses of the flexible piezoelectric film and the flexible electrode layer are gradient-distributed along the axial direction. The thickness of the flexible piezoelectric film located in the middle of the axial direction is greater than the thickness of the flexible piezoelectric film located at both ends of the axial direction, and the thickness of the flexible electrode layer located in the middle of the axial direction is less than the thickness of the flexible electrode layer located at both ends of the axial direction.

2. The piezoelectric ceramic thin-film power generation device according to claim 1, characterized in that, The piezoelectric power generation component further includes an upper end electrode layer and a lower end electrode layer: The end electrode layer is disposed at the axial top end of the multi-layer stacked structure, and the side of the end electrode layer facing the counterweight mass block abuts against the counterweight mass block; The lower end electrode layer is disposed at the axial bottom end of the multilayer stacked structure, and the side of the lower end electrode layer facing the buffer pad abuts against the buffer pad; Both the upper end electrode layer and the lower end electrode layer are electrically connected to the outermost flexible electrode layer in the multilayer stacked structure; The outer diameters of the upper end electrode layer and the lower end electrode layer are both larger than the outer diameter of the multilayer stacked structure, so as to form a radial extension for connecting external lead wires.

3. The piezoelectric ceramic thin-film power generation device according to claim 2, characterized in that, Both the upper end electrode layer and the lower end electrode layer are multilayer composite film structures, and the multilayer composite film structure comprises, from the inside out: A metal bonding layer is electrically connected to the outermost flexible electrode layer in the multilayer stacked structure; A stress buffer layer is stacked on the outer surface of the metal adhesive layer; A wear-resistant contact layer is stacked on the outer surface of the stress buffer layer to form a contact surface with the counterweight block or the buffer pad.

4. The piezoelectric ceramic thin-film power generation device according to claim 1, characterized in that, The number of layers in the multilayer stacked structure includes 5 to 30 layers, and a flexible electrode layer is sandwiched between each two adjacent flexible piezoelectric film layers, and the two outermost layers are both flexible electrode layers. The total thickness of the multi-layer stacked structure includes 50~300 mm. m, and a radial gap of 0.5~2mm is formed between the outer peripheral surface of the multi-layer stacked structure and the inner wall of the shell.

5. The piezoelectric ceramic thin-film power generation device according to claim 1, characterized in that, The energy management module includes a rectifier unit, an energy storage unit, and a voltage regulator unit: The input terminal of the rectifier unit is electrically connected to the flexible electrode layer of the piezoelectric power generation component, and is used to convert the alternating current output by the piezoelectric power generation component into direct current. The input terminal of the energy storage unit is electrically connected to the output terminal of the rectifier unit, and is used to store rectified electrical energy; The input terminal of the voltage regulator unit is electrically connected to the output terminal of the energy storage unit, and the output terminal of the voltage regulator unit is used to provide a stable DC voltage to the external load.

6. The piezoelectric ceramic thin-film power generation device according to claim 5, characterized in that, The energy management module also includes a status monitoring unit: The status monitoring unit is electrically connected to the energy storage unit and the voltage regulator unit respectively, and the status monitoring unit includes a voltage sampling circuit, a current sampling circuit and a communication interface; The voltage sampling circuit is connected in parallel with the energy storage unit and is used to collect the terminal voltage of the energy storage unit; The current sampling circuit is connected in series with the energy storage unit and is used to collect the charging and discharging current of the energy storage unit. The communication interface is electrically connected to the voltage sampling circuit and the current sampling circuit respectively, and is used to output the state of charge and health status information of the energy storage unit to external devices.

7. The piezoelectric ceramic thin-film power generation device according to claim 1, characterized in that, The counterweight block includes a main mass body, a pressure-bearing boss, a guide ring, and a limiting retaining ring. The pressure-bearing boss is located at one end of the main mass body facing the multi-layer stacked structure and abuts against the multi-layer stacked structure; The guide ring is sleeved on the outer peripheral surface of the main mass body and slides in fit with the inner wall of the shell. The limiting ring is fixed to the inner wall of the housing and is located on the side of the main mass body away from the multi-layer stacked structure, forming an axial gap with the main mass body.

8. The piezoelectric ceramic thin-film power generation device according to claim 7, characterized in that, The inner wall of the housing is provided with at least one set of axial guide grooves, which are slidably engaged with the guide ring. The axial guide grooves are used to restrict the counterweight mass block from moving along the axial direction of the housing. The inner wall of the axial guide groove is coated with at least one layer of self-lubricating and wear-resistant coating.

9. The piezoelectric ceramic thin-film power generation device according to claim 1, characterized in that, The buffer pad includes an elastic matrix and a stress-dispersing layer disposed on the side of the elastic matrix facing the multilayer stacked structure. The elastic matrix is ​​fixedly connected to the inner wall of the shell, and the stress-dispersing layer abuts against the central region of the end face of the multilayer stacked structure.

10. A sight, characterized in that, Includes a piezoelectric ceramic thin film power generation device as described in any one of claims 1-9.

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