Wind energy and vibration energy composite collection device and method thereof

Abstract

The invention relates to the field of energy collection, and particularly provides a wind energy and vibration energy composite collection device and a method thereof.The wind energy and vibration energy composite collection device comprises a wind collection blade assembly which comprises a fan blade rotating shaft and a wind collection blade set arranged on the fan blade rotating shaft; the crank sliding block assembly comprises a crank, a connecting rod and a permanent magnet sliding block, the fan blade rotating shaft is fixedly arranged on the crank, the connecting rod is pivotally connected with the crank, and the permanent magnet sliding block is fixedly arranged on the connecting rod; the electromagnetic assembly comprises a sliding block sleeve and a coil arranged on the sliding block sleeve in a sleeving mode, and the permanent magnet sliding block is arranged in the sliding block sleeve in the mode that the permanent magnet sliding block can slide in the axial direction of the sliding block sleeve in a reciprocating mode. By means of the structure, wind energy and vibration energy can be compositely collected through the arrangement of the crank sliding block assembly and stably converted into electric energy.

Description

Technical Field

[0001] This application relates to the field of energy harvesting, and particularly to a combined wind energy and vibration energy harvesting device and method thereof. Background Art

[0002] In order to address the increasingly prominent issues of both energy shortage and environmental protection, energy harvesting (and conversion) technologies for renewable energy in the environment have received extensive attention. Energy harvesting technologies for renewable energy in the environment mainly capture the energy generated by renewable energy in the environment and convert it into usable electrical energy. However, current energy harvesting technologies generally involve the utilization of a single energy form such as wind energy, vibration energy, thermal energy, and light energy. Therefore, in practical applications, they are often limited to a certain extent by the form of energy and environmental conditions. For example, the efficiency of a wind energy harvesting device significantly decreases when the wind speed is low or the environmental wind resources are unstable, and it is difficult for a vibration energy harvesting device to capture fluctuations in the vibration frequency or amplitude of the object. It can be seen that a single energy harvesting device has certain limitations in terms of applicability and efficiency, and it is difficult to meet diverse application requirements. Especially in a relatively complex environment, in an energy harvesting device based on the utilization of a single energy form, the volatility of its energy supply directly affects the stability of device operation.

[0003] Combined energy harvesting devices have become a research hotspot for improving energy harvesting efficiency and expanding applicable scenarios because they can integrate multiple environmental energies. The working principle of a combined wind energy and vibration energy harvesting device (Wind and vibration energy harvester, which can also be called a combined wind energy and vibration energy collector) is to capture the energy generated by wind force and structural vibration and convert it into usable electrical energy. In this way, by utilizing two energy sources, compared with a single energy harvesting method, it has characteristics such as high efficiency and low power consumption, and is particularly suitable for energy harvesting in an environment with low energy density. For example, in sensor networks deployed on bridges, railway infrastructure, and remote areas, a combined wind energy and vibration energy collector can effectively utilize the interaction between wind force and vibration in the environment, convert the harvested energy into electrical energy, and provide sustainable energy support for self-powered devices. It has broad application prospects in fields such as the Internet of Things, environmental monitoring, and industrial equipment health monitoring. However, there is still room for improvement in how to optimize the structure of a combined wind energy and vibration energy collector. Summary of the Invention

[0004] To at least partially solve the above technical problems and / or at least part of the above technical problems, this application is proposed.

[0005] In a first aspect, the present application provides a composite energy harvesting device for wind energy and vibration energy. The device includes: a wind collecting blade assembly, which includes a wind blade rotating shaft and a wind collecting blade group provided on the wind blade rotating shaft; a crank-slider assembly, which includes a crank, a connecting rod, and a permanent magnet slider. The wind blade rotating shaft is fixedly provided on the crank, the connecting rod is pivotally connected to the crank, and the permanent magnet slider is fixedly provided on the connecting rod; and an electromagnetic assembly, which includes a slider sleeve and a coil sleeved on the slider sleeve. The permanent magnet slider is arranged in the slider sleeve in a manner that can reciprocally slide along the axial direction of the slider sleeve.

[0006] With such a configuration, it is possible to seek to perform composite harvesting of wind energy and vibration energy through the setting of the crank-slider assembly and stably convert it into electrical energy.

[0007] For the above-mentioned composite energy harvesting device for wind energy and vibration energy, in a possible implementation manner, the crank-slider assembly includes: a connecting rod sleeve, which is fixedly connected to the connecting rod; and a crank-connecting rod rotating shaft, and the crank is fixedly connected to the connecting rod sleeve through the crank-connecting rod rotating shaft.

[0008] With such a configuration, a possible structural form of the crank-slider assembly is given.

[0009] For the above-mentioned composite energy harvesting device for wind energy and vibration energy, in a possible implementation manner, the crank-slider assembly includes a crank-connecting rod rotating shaft fixing ring, and the crank-connecting rod rotating shaft is clamped and fixed to the connecting rod sleeve through the crank-connecting rod rotating shaft fixing ring; and / or the connecting rod sleeve is fixedly arranged on the connecting rod by an interference fit manner; and / or the crank-slider assembly includes a permanent magnet slider fixing ring, and the permanent magnet slider is fixedly arranged on the connecting rod through the permanent magnet slider fixing ring.

[0010] With such a configuration, it is possible to seek to ensure reliable transmission of mechanical energy.

[0011] For the above-mentioned composite energy harvesting device for wind energy and vibration energy, in a possible implementation manner, the device includes an outer structure assembly. The outer structure assembly includes: an outer structure upper shell cover, on which a wind blade rotating shaft support frame is provided, and the wind blade rotating shaft is pivotally arranged on the wind blade rotating shaft support frame through a bearing.

[0012] With such a configuration, it is possible to seek to ensure that the wind collecting blade assembly can rotate smoothly under the action of ambient wind force.

[0013] For the above-mentioned composite energy harvesting device for wind energy and vibration energy, in a possible implementation manner, the outer structure assembly includes: an outer structure lower shell cover, which is fixedly connected to or integrally formed with the outer structure upper shell cover, and the slider sleeve is fixedly arranged on the outer structure lower shell cover.

[0014] With such a configuration, it is possible to ensure the installation stability of the slider sleeve.

[0015] For the above-mentioned wind energy and vibration energy composite collection device, in a possible implementation manner, the outer structure assembly includes: an outer structure connection bracket, and the upper shell cover of the outer structure is fixedly connected to the lower shell cover of the outer structure through the outer structure connection bracket; wherein, the upper end and the lower end of the slider sleeve along its axial direction are respectively fixedly connected to the outer structure connection bracket and the lower shell cover of the outer structure.

[0016] With such a configuration, a possible structural form of the outer structure assembly is given.

[0017] For the above-mentioned wind energy and vibration energy composite collection device, in a possible implementation manner, a support structure is provided on the lower shell cover of the outer structure, and the slider sleeve is fixedly arranged on the support structure; and / or the upper shell cover of the outer structure is fixedly connected to the outer structure connection bracket by means of fasteners.

[0018] With such a configuration, it is possible to ensure that the outer structure assembly provides overall protection for the device and ensure the normal operation of the internal components.

[0019] In a second aspect, the present application provides a composite collection method using the wind energy and vibration energy composite collection device described in any one of the foregoing items. The method includes: when the wind energy collection blade group rotates driven by the wind energy in the environment, the wind energy collection blade group drives the crank to rotate and thus enables the permanent magnet slider to perform reciprocating motion in the slider sleeve.

[0020] With such a configuration, it is possible to convert the rotational motion of the wind energy collection blades generated by the wind energy into the reciprocating linear motion of the permanent magnet slider relative to the coil. The relative linear motion generates an induced electromotive force, thereby realizing the conversion of wind energy and vibration energy into electrical energy.

[0021] It can be understood that the composite collection method has all the technical effects of the energy collection device described in any one of the foregoing items, and will not be elaborated here.

[0022] For the above-mentioned composite collection method, in a possible implementation manner, the collection of energy includes two parts: the collection of wind energy and the collection of vibration energy. Specifically:

[0023] First part: For the collection of wind energy:

[0024] The wind energy collection blade group drives the wind blade rotating shaft to rotate by capturing wind energy. Specifically:

[0025] The relationship between the rotational speed ω of the wind energy collection blade group and the environmental wind speed V is:

[0026] ω = k1·V (1)

[0027] Among them, k1 is a proportionality coefficient, defined as:

[0028]

[0029] C p is the power coefficient of the wind-collecting blade group (representing the efficiency of converting wind energy into mechanical energy);

[0030] ρ is the density of the ambient air;

[0031] A is the swept area of the wind-collecting blade group;

[0032] T res is the total resistance torque on the wind blade rotating shaft (such as usually including mechanical loss torque and load torque);

[0033] The sliding speed v of the permanent magnet slider 滑块 (t) and the rotational speed ω of the wind-collecting blade group have the following relationship:

[0034]

[0035] Wherein:

[0036] r is the length of the crank;

[0037] l is the length of the connecting rod;

[0038] θ = ω·t is the rotational angle of the crank;

[0039] -r·ω·sin(θ) represents the change in the slider speed directly caused by the rotational motion of the crank;

[0040] represents the influence of the connecting rod correction on the slider speed;

[0041] According to formulas (1) to (3), the reciprocating sliding speed v of the permanent magnet slider 滑块 (t) and the ambient wind speed V have the following relationship:

[0042]

[0043] Part Two: For the collection of vibration energy:

[0044] The wind energy and vibration energy composite collection device includes an outer structure component. The outer structure component includes an outer structure lower shell cover. The slider sleeve is fixedly arranged on the outer structure lower shell cover. Along with the vibration conducted by the outer structure lower shell cover, the permanent magnet slider reciprocates in the slider sleeve. Specifically:

[0045] The speed v of the permanent magnet slider 滑块(t) is the vibration displacement x of the permanent magnet slider (t) The derivative with respect to time and satisfies:

[0046] v 滑块 (t) = 2πf·A0·e -γt ·cos(2πf·t) - γ·A0·e -γt ·sin(2πf·t) (5)

[0047] Where:

[0048] v 滑块 (t) is the instantaneous velocity of the permanent magnet slider;

[0049] A0 is the initial amplitude;

[0050] γ is the damping coefficient;

[0051] f is the vibration frequency of the permanent magnet slider;

[0052] e -γt Is the exponential decay term;

[0053] cos(2πf·t) is the cosine component of the oscillatory motion;

[0054] sin(2πf·t) is the sine component of the oscillatory motion;

[0055] 2πf·A0·e -γt ·cos(2πf·t) term is the periodic velocity component of the oscillatory motion;

[0056] -γ·A0·e -γt ·sin(2πf·t) term is the additional velocity due to damping.

[0057] For the above composite acquisition method, in a possible implementation, for the conversion of electrical energy:

[0058] Based on the reciprocating motion of the permanent magnet slider, the induced electromotive force ε(t) generated in the coil, and the expression of ε(t) is:

[0059]

[0060] Where:

[0061] N is the number of turns of the coil;

[0062] φ(t) is the magnetic flux of the permanent magnet slider in the coil, and the expression of φ(t) is:

[0063] φ(t) = B eff A coil f(x(t)) (7)

[0064] Wherein:

[0065] B eff is the equivalent magnetic induction intensity generated by the permanent magnet slider;

[0066] A coil is the effective cross-sectional area of the coil;

[0067] f(x(t)) is the magnetic field distribution function;

[0068] Since the vibration displacement x(t) of the permanent magnet slider is driven by the vibration system, the expression of its dynamic behavior is:

[0069] x(t) = A0e -γt cos(2πft + θ0) (8)

[0070] According to formula (6) and formula (7), it is obtained that:

[0071]

[0072] With such a structure, the device gives a quantitative definition of wind energy collection, vibration energy collection, and electric energy conversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The present application will be described below with reference to the drawings and in combination with the specific structure of the wind energy and vibration energy composite collection device in the examples. In the drawings:

[0074] Figure 1 shows the structural schematic of the wind energy and vibration energy composite collection device according to an embodiment of the present application Figure 1 , and the outer structure upper cover is removed in the figure;

[0075] Figure 2 shows the sectional schematic of the wind energy and vibration energy composite collection device according to an embodiment of the present application Figure 1 ;

[0076] Figure 3 shows the sectional schematic of the wind energy and vibration energy composite collection device according to an embodiment of the present application Figure 2 ; and

[0077] Figure 4 shows the structural schematic of the outer housing in the wind energy and vibration energy composite collection device according to an embodiment of the present application Figure 2 , and the outer structure components are mainly shown in the figure.

[0078] List of reference signs:

[0079] 100, wind energy and vibration energy composite collection device;

[0080] 1, wind collecting blade assembly;

[0081] 11. Wind blade rotating shaft; 12. Wind collecting blade group;

[0082] 2. Crank-slider assembly;

[0083] 21. Crank; 22. Connecting rod; 23. Permanent magnet slider; 24. Connecting rod sleeve; 25. Crank-connecting rod rotating shaft; 26. Crank-connecting rod rotating shaft fixing ring; 27. Permanent magnet slider fixing ring;

[0084] 3. Electromagnetic assembly;

[0085] 31. Slider sleeve; 32. Coil; 33. Coil support;

[0086] 41. Outer structure upper shell cover; 411. Wind blade rotating shaft support frame;

[0087] 42. Outer structure lower shell cover; 421. Support structure;

[0088] 43. Outer structure connecting bracket;

[0089] 200. Platform to be measured. Detailed implementation manners

[0090] The preferred implementation manners of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application.

[0091] It should be noted that in the description of the present application, the terms indicating the direction or positional relationship such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the direction or positional relationship shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0092] In addition, it should also be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can also be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0093] In addition, for a better illustration of the present application, numerous specific details are provided in the following detailed implementation manners. Those skilled in the art should understand that the present application can also be implemented without certain specific details. In some instances, the structural details, principles, etc. of energy harvesting and conversion that are well-known to those skilled in the art are not described in detail to highlight the gist of the present application.

[0094] Mainly referring to Figures 1 to 4 , in a possible implementation manner, the composite wind energy and vibration energy harvesting device 100 mainly includes a wind collecting blade assembly 1, a crank-slider assembly 2, an electromagnetic assembly 3, and an outer structure assembly 4. Among them, the wind collecting blade assembly 1 mainly includes a wind blade rotating shaft 11 and a wind collecting blade group 12 arranged on the wind blade rotating shaft. The wind collecting blade group 12 is pivotally arranged (arranged in a rotatable manner) on the outer structure assembly. The blade assembly is mainly used to collect wind energy in the environment and is manifested as the rotation of the wind collecting blade group 12. Specifically, driven by the wind energy in the environment, the wind collecting blade group 12 will rotate. Among them, through the cooperation of the crank-slider assembly 2 and the electromagnetic assembly 3, the rotation can be converted into vibration (reciprocating linear motion), and further the vibration can be converted into electric energy. Among them, the outer structure assembly mainly serves as the installation carrier of the device and provides protection for the device.

[0095] In a possible implementation manner, the crank-slider assembly 2 mainly includes a crank 21, a connecting rod 22, a permanent magnet slider 23, a connecting rod sleeve 24, and a crank-connecting rod rotating shaft 25. The wind blade rotating shaft 12 is fixedly arranged on the crank. The connecting rod and the crank are pivotally connected. The crank 21 is fixedly connected to the connecting rod sleeve 24 through the crank-connecting rod rotating shaft 25. The connecting rod sleeve 24 is fixedly connected to the connecting rod 22. The permanent magnet slider 23 is fixedly arranged on the connecting rod 22.

[0096] In a possible implementation manner, the electromagnetic assembly 3 mainly includes a slider sleeve 31 and a coil 32 sleeved on the slider sleeve. The permanent magnet slider is arranged in the slider sleeve in a manner that can reciprocate axially along the slider sleeve.

[0097] In a possible implementation manner, one end (the left end in the figure) of the wind blade rotating shaft 11 is provided with a wind collecting blade group 12, and the other end (the right end in the figure) is connected to the crank-connecting rod assembly 2. As in this example, the wind collecting blade group 12 is fixedly arranged at one end of the wind blade rotating shaft 11 by an interference fit method. The other end of the wind blade rotating shaft 11 is fixedly connected to the crank 21 of the crank-connecting rod assembly 2 by an interference fit method. The wind blade rotating shaft 11 is pivotally arranged on the outer structure upper cover 411 of the outer structure assembly 4 through a wind blade rotating shaft bearing 13. In this way, under the action of the wind force in the environment, the smooth rotation of the wind blade rotating shaft 11 can be realized.

[0098] In a possible implementation, the outer structure component 4 mainly includes an outer structure upper shell cover 41, an outer structure lower shell cover 42, and an outer structure connection bracket 43. A wind blade rotating shaft support frame 411 is provided on the outer structure upper shell cover 41, and the wind blade rotating shaft 11 is pivotally arranged on the wind blade rotating shaft support frame 411 through a wind blade rotating shaft bearing 13. The outer structure lower shell cover 42 can be fixed to the target scenario. The outer structure upper shell cover 41 and the outer structure lower shell cover 42 are fixedly connected through the outer structure connection bracket 43.

[0099] In a possible implementation, the crank 21 is connected to the connecting rod sleeve 24 through a crank connecting rod rotating shaft 25 and is clamped and fixed on the connecting rod sleeve 24 through a crank connecting rod rotating shaft fixing ring 26. The connecting rod sleeve 24 is fixedly arranged on the connecting rod 22. As in this example, the connecting rod sleeve 24 is fixedly arranged at one end (the upper end in the figure) of the connecting rod 22 by an interference fit. A permanent magnet slider 23 is arranged at the other end (the lower end in the figure) of the connecting rod 22. As in this example, the permanent magnet slider 23 is fixedly arranged at the lower end of the connecting rod 22 through a permanent magnet slider fixing ring 27, so as to realize reliable transmission of mechanical energy.

[0100] In a possible implementation, the permanent magnet slider 23 is arranged in the slider sleeve 31 in a slidable manner. The top of the slider sleeve 31 is fixedly arranged on the outer structure connection bracket 43, and the bottom is fixedly arranged on the outer structure lower shell cover 42. As in this example, the top of the slider sleeve 31 is arranged on the inner wall of the outer structure connection bracket 43 by an interference fit. A support structure 421 with an annular structure is machined above the outer structure lower shell cover 42, and the bottom of the slider sleeve 31 is arranged on the inner wall of the support structure by an interference fit. A coil 32 (such as a copper coil, etc.) is wound around the outer wall of the slider sleeve 31. As in this example, a coil bracket 33 is fixedly arranged on the outer wall of the slider sleeve 31, and the coil 32 is wound around the coil bracket 33, so as to form a stable energy conversion structure.

[0101] In a possible implementation, the outer structure upper shell cover 41 is fixedly connected to the outer structure connection bracket 43 by means of fasteners (such as multiple groups of bolts, etc.), and the outer structure connection bracket 43 is fixedly connected to the outer structure lower shell cover 42. In this way, the outer structure upper shell cover 41, the outer structure connection bracket 43, and the outer structure lower shell cover 42 jointly form a stable outer shell, so as to provide protection for the device and ensure the normal operation of internal components.

[0102] In a possible implementation, the outer structure lower housing cover 42 can be fixed to the platform to be measured 200 or the installation position in any target scenario in practical applications to achieve the fixation of the device. Exemplarily, three mounting holes are evenly distributed along the circumference on the bottom surface of the outer structure lower housing cover 42 at an interval of 120°, and by means of the cooperation of fasteners such as bolts with the mounting holes, the wind energy and vibration energy composite collection device can be reliably fixed to the platform to be measured 200.

[0103] In the wind energy and vibration energy composite collection device of the present application, through the setting of the crank connecting rod assembly, the wind energy and vibration energy can be reliably converted into electric energy. Specifically, the wind energy in the environment drives the wind collecting blade group 12 to rotate, and thus drives the crank 21 in the crank connecting rod assembly, which is fixedly connected to the wind collecting blade group 12 through the wind blade rotating shaft 11, to perform a rotational motion. The rotation of the crank 21 drives the connecting rod 22 and the permanent magnet slider 23 fixedly arranged on the connecting rod 22 to reciprocate in the slider sleeve 31, thereby converting the rotational motion (mechanical energy - rotation) of the wind collecting blade group 12 into the reciprocating linear motion (mechanical energy - vibration) of the permanent magnet slider 23 in the slider sleeve 31. Along with the reciprocating linear motion of the permanent magnet slider 23 in the slider sleeve 31, an induced electromotive force is generated between the permanent magnet slider 23 and the coil 32, thereby realizing the conversion of wind energy and vibration energy into electric energy.

[0104] Based on the above wind energy and vibration energy composite collection device, the present application also provides a composite collection method for the wind energy and vibration energy composite collection device, wherein the collection of energy includes two parts: the collection of wind energy and the collection of vibration energy. Specifically:

[0105] The first part: The collection of wind energy:

[0106] The wind collecting blade group drives the wind blade rotating shaft to rotate by capturing wind energy, thereby realizing the collection of wind energy. Specifically:

[0107] The relationship between the rotational speed ω of the wind collecting blade group and the environmental wind speed V is:

[0108] ω = k1·V (1)

[0109] Among them, k1 is a proportionality coefficient, defined as:

[0110]

[0111] C p is the power coefficient of the wind collecting blade group, and the power coefficient represents the efficiency of converting wind energy into mechanical energy;

[0112] ρ is the density of the environmental air;

[0113] A is the swept area of the wind collecting blade group;

[0114] Tres is the total resistance torque on the wind blade rotating shaft. Generally, the total resistance torque includes mechanical loss torque and load torque;

[0115] The sliding speed v of the permanent magnet slider 滑块 (t) and the rotational speed ω of the wind collecting blade group are related as follows:

[0116]

[0117] Where:

[0118] r is the length of the crank;

[0119] l is the length of the connecting rod;

[0120] θ = ω·t is the rotation angle of the crank;

[0121] -r·ω·sin(θ) represents the change in the slider speed directly caused by the rotational motion of the crank;

[0122] represents the influence of the connecting rod correction on the slider speed;

[0123] According to formulas (1) to (3), the reciprocating sliding speed v of the permanent magnet slider 滑块 (t) and the relationship with the ambient wind speed V:

[0124]

[0125] Part Two: Collection of Vibration Energy:

[0126] The wind energy and vibration energy composite collection device includes an outer structure component. The outer structure component includes an outer structure lower shell cover. The permanent magnet slider in the slider sleeve is fixedly arranged on the outer structure lower shell cover. With the power transmission of the outer structure lower shell cover, the permanent magnet slider in the slider sleeve generates periodic reciprocating motion. This reciprocating motion originates from the excitation of the external environment, causing the permanent magnet slider to oscillate axially in the slider sleeve. This vibration can be described as a damped harmonic system, and its motion form conforms to the characteristics of a damped second-order vibration system. Specifically:

[0127] The speed v of the permanent magnet slider 滑块 (t) is the derivative of the vibration displacement x of the permanent magnet slider (t) with respect to time and satisfies:

[0128] v 滑块 (t) = 2πf·A0·e -γt ·cos(2πf·t) - γ·A0·e -γt ·sin(2πf·t) (5)

[0129] Where:

[0130] v 滑块 v(t) is the instantaneous velocity of the permanent magnet slider;

[0131] A0 is the initial amplitude;

[0132] γ is the damping coefficient, which determines the attenuation rate of vibration;

[0133] f is the vibration frequency of the permanent magnet slider (the natural vibration frequency of the slider);

[0134] e -γt is the exponential decay term, which is used to describe the attenuation behavior of the amplitude over time;

[0135] cos(2πf·t) is the cosine component of the oscillatory motion, representing periodic motion;

[0136] sin(2πf·t) is the sine component of the oscillatory motion, with a 90° phase difference from the cosine component;

[0137] 2πf·A0·e -γt ·cos(2πf·t) term is the periodic velocity component of the oscillatory motion. It is related to the amplitude A0 and is affected by the exponential decay term e -γt . The cosine component cos(2πf·t) controls the periodic behavior of the vibration, reflecting the reciprocating motion of the slider;

[0138] -γ·A0·e -γt ·sin(2πf·t) term is the additional velocity generated due to the damping effect. The negative sign indicates that this component is opposite to the main motion direction, that is, this part of the motion is caused by energy dissipation. The sine component sin(2πf·t) causes a 90° phase shift of this term from the main motion, further reflecting the damping effect.

[0139] Corresponding to the energy harvesting of the aforementioned two parts (the first part and the second part), the wind energy and vibration energy composite harvesting device will convert the harvested energy into electrical energy.

[0140] Part Three, Conversion of Electrical Energy:

[0141] Based on the reciprocating motion of the permanent magnet slider relative to the coil, an induced electromotive force ε(t) can be generated in the coil. The expression of ε(t) is:

[0142]

[0143] Where:

[0144] N is the number of turns of the coil;

[0145] φ(t) is the magnetic flux of the permanent magnet slider in the coil, and its magnitude is driven by the vibration displacement x(t) of the permanent magnet slider.

[0146] According to the definition of magnetic flux, the magnetic flux φ(t) can be expressed as:

[0147] φ(t) = B eff A coil f(x(t)) (7)

[0148] Where:

[0149] B eff is the equivalent magnetic induction intensity generated by the permanent magnet slider;

[0150] A coil is the effective cross-sectional area of the coil;

[0151] f(x(t)) is the magnetic field distribution function, which describes the magnetic flux distribution characteristics of the permanent magnet slider at different positions x(t);

[0152] Since the vibration displacement x(t) of the permanent magnet slider is driven by the vibration system, its dynamic behavior can be described by a damped harmonic model. Specifically:

[0153] x(t) = A0e -γt cos(2πft + θ0) (8)

[0154] Therefore, the time derivative of the magnetic flux can be further obtained from x(t) and its derivative. This enables the induced electromotive force ε(t) to be expressed by the following relationship:

[0155]

[0156] This formula shows that the induced electromotive force ε(t) in the coil is directly driven by the vibration of the slider, and its variation law depends on the instantaneous rate of change of the position of the permanent magnet slider, that is, the derivative of x(t).

[0157] It can be seen that in the preferred embodiment of the present application, the wind energy and vibration energy composite collection device can efficiently collect two different forms of environmental energy, wind energy and vibration energy. The device adopts multi-mode energy integration technology. Through the synergistic excitation of wind energy and vibration energy, the system responds to energy input within a wider frequency band, avoiding intermittent energy loss caused by fluctuations in a single energy source, thereby improving the overall energy collection efficiency. It is particularly suitable for energy collection scenarios with relatively variable environments (such as certain unstable factors). In addition, the device adopts a compact design without complex transmission components, which avoids the wear problem in traditional mechanical systems and improves long-term reliability. At the same time, a modular structure is adopted so that each functional unit can be replaced and maintained independently, reducing maintenance costs, and can be flexibly configured for different application scenarios. Based on this design, the device can still maintain stable operation in complex environments (such as open areas with large wind speed changes or industrial environments with variable vibration modes), ensuring long-term and stable collection of environmental vibration energy, improving energy conversion efficiency, and expanding its application potential in remote monitoring, intelligent infrastructure and other fields. For example, it can be widely used in the fields of industrial automation operation and maintenance monitoring, transportation equipment health maintenance, etc., especially in resource-limited or remote areas, and can more obviously show good application potential. For example, the wind energy and vibration energy composite collection device of this application can be integrated with the energy management system in the target application scenario, so as to construct an energy self-consistent system corresponding to the target application scenario, realize the efficient use of green energy, and reduce the target scenario's dependence on external energy as much as possible.

[0158] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A composite energy harvesting device for wind energy and vibration energy, characterized in that, The device includes: A wind collecting blade assembly, which includes a wind blade rotating shaft and a wind collecting blade group arranged on the wind blade rotating shaft; A crank-slider assembly, which includes a crank, a connecting rod, and a permanent magnet slider. The wind blade rotating shaft is fixedly arranged on the crank, the connecting rod is pivotally connected to the crank, and the permanent magnet slider is fixedly arranged on the connecting rod; and An electromagnetic assembly, which includes a slider sleeve and a coil sleeved on the slider sleeve. The permanent magnet slider is arranged in the slider sleeve in a manner that can reciprocate axially along the slider sleeve.

2. The wind energy and vibration energy composite collection device according to claim 1, wherein the crank-slider assembly includes: A connecting rod sleeve, which is fixedly connected to the connecting rod; And A crank-connecting rod rotating shaft, and the crank is fixedly connected to the connecting rod sleeve through the crank-connecting rod rotating shaft.

3. The composite energy harvesting device for wind energy and vibration energy according to claim 2, wherein The crank-slider assembly includes a crank-connecting rod rotating shaft fixing ring, and the crank-connecting rod rotating shaft is clamped and fixed to the connecting rod sleeve through the crank-connecting rod rotating shaft fixing ring; and / or The connecting rod sleeve is fixedly arranged on the connecting rod by an interference fit manner; and / or The crank-slider assembly includes a permanent magnet slider fixing ring, and the permanent magnet slider is fixedly arranged on the connecting rod through the permanent magnet slider fixing ring.

4. The composite energy harvesting device for wind energy and vibration energy according to claim 1, characterized in that, The device includes an outer structure assembly, and the outer structure assembly includes: An outer structure upper shell cover, on which a wind blade rotating shaft support frame is arranged, and the wind blade rotating shaft is pivotally arranged on the wind blade rotating shaft support frame through a bearing.

5. The composite energy harvesting device for wind energy and vibration energy according to claim 4, wherein The outer structure assembly includes: An outer structure lower shell cover, which is fixedly connected to or integrally formed with the outer structure upper shell cover, and the slider sleeve is fixedly arranged on the outer structure lower shell cover.

6. The wind energy and vibration energy composite collection device according to claim 5, characterized in that, The outer structure assembly includes: An outer structure connecting bracket, and the outer structure upper shell cover is fixedly connected to the outer structure lower shell cover through the outer structure connecting bracket; Wherein, the upper end and the lower end of the slider sleeve along its axis are respectively fixedly connected to the outer structure connecting bracket and the outer structure lower shell cover.

7. The wind energy and vibration energy composite harvesting device according to claim 6, wherein, A support structure is arranged on the outer structure lower shell cover, and the slider sleeve is fixedly arranged on the support structure; and / or The outer structure upper shell cover is fixedly connected to the outer structure connecting bracket by means of fasteners.

8. A composite collection method using the composite collection device of wind energy and vibration energy according to any one of claims 1 to 7, characterized in that, The composite collection method includes: When the wind collecting blade group rotates driven by the wind energy in the environment, the wind collecting blade group drives the crank to rotate, and thus the permanent magnet slider reciprocates in the slider sleeve.

9. The composite collection method according to claim 8, wherein The first part, for the collection of wind energy: The wind collecting blade group drives the wind blade rotating shaft to rotate by capturing wind energy. Specifically: The relationship between the rotational speed ω of the wind collecting blade group and the ambient wind speed V is: ω = k1·V (1) Wherein, k1 is a proportionality coefficient, defined as: C p is the power coefficient of the wind collecting blade group; ρ is the density of the ambient air; A is the swept area of the wind collecting blade group; T res is the total resistance torque on the wind blade rotating shaft; The sliding speed v of the permanent magnet slider 滑块 (t) and the rotational speed ω of the wind collecting blade group are related as follows: Wherein: r is the length of the crank; l is the length of the connecting rod; θ = ω·t is the rotational angle of the crank; -r·ω·sin(θ) represents the change in the slider speed directly caused by the rotational motion of the crank; Indicate the influence of connecting rod correction on the slider speed; According to formulas (1) to (3), the reciprocating sliding speed v 滑块 (t) of the permanent magnet slider and the relationship with the ambient wind speed V is as follows: The second part, for the collection of vibration energy: The composite wind energy and vibration energy harvesting device includes an outer structure assembly, and the outer structure assembly includes an outer structure lower shell cover. The slider sleeve is fixedly arranged on the outer structure lower shell cover. Specifically: The velocity v of the permanent magnet slider 滑块 (t) is the vibration displacement x of the permanent magnet slider (t) which is the derivative with respect to time and satisfies: v 滑块 v(t) = 2πf·A0·e -γt ·cos(2πf·t) - γ·A0·e -γt ·sin(2πf·t) (5) Wherein: v 滑块 (t) is the instantaneous velocity of the permanent magnet slider; A0 is the initial amplitude; γ is the damping coefficient (determining the attenuation rate of vibration); f is the vibration frequency of the permanent magnet slider; e -γt is an exponential decay term; cos(2πf·t) is the cosine component of the oscillatory motion; sin(2πf·t) is the sine component of the oscillatory motion; 2πf·A0·e -γt ·cos(2πf·t) is the periodic velocity component of the oscillatory motion; -γ·A0·e -γt The term -γ·A0·e·sin(2πf·t) is the additional velocity generated due to the damping effect.

10. The composite acquisition method according to claim 9, wherein For the conversion of electrical energy: Based on the reciprocating motion of the permanent magnet slider, the induced electromotive force ε(t) generated in the coil, and the expression of ε(t) is: Wherein: N is the number of turns of the coil; φ(t) is the magnetic flux of the permanent magnet slider in the coil, and the expression of φ(t) is: φ(t) = B eff A coil f(x(t)) (7) Wherein: B eff is the equivalent magnetic induction intensity generated by the permanent magnet slider; A coil is the effective cross-sectional area of the coil; f(x(t)) is the magnetic field distribution function; Since the vibration displacement x(t) of the permanent magnet slider is driven by the vibration system, the expression of its dynamic behavior is: x(t) = A0e -γt cos(2πft + θ0) (8) According to formula (6) and formula (7), it is obtained that:

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