A flexible bistable overhead power transmission line power generation device and line self-powering method

Abstract

The present invention relates to an elastic bistable overhead power transmission line power generation device and a line self-power supply method. The elastic bistable overhead power transmission line power generation device comprises a shell, an elastic bistable structure arranged in the shell, and a friction nano-power generation unit; the elastic bistable structure comprises a cantilever beam, a limit sleeve, an elastic magnet and a dynamic spring; one end of the cantilever beam is connected to the inner wall of the shell, and the other end is connected to a tip magnet. The present invention combines the elastic bistable structure with a TENG in a vertical contact separation mode to achieve broadband energy collection, and the elastic bistable form can achieve multiple sub-resonance frequencies outside the main resonant frequency by adjusting the vibration characteristics of the cantilever beam structure in the non-resonance zone. The wider resonance range and multiple sub-resonance frequencies not only ensure the broadband effect of TENG in energy collection, improve the vibration frequency response range of the power generation device and broaden the response direction, but also ensure the high performance output of TENG.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to an elastic bistable overhead power transmission line power generation device and a line self-power supply method. Background Art

[0002] Traditional monitoring devices for transmission lines mostly rely on dry batteries and solar energy combined with storage batteries for power supply. However, the drawbacks of dry batteries, such as frequent replacement, high maintenance costs, and environmental pollution caused by post-processing, have always been effectively solved. The efficiency of solar energy collection is easily affected by weather and pollutants on the surface of solar panels. In addition, the volume of solar energy combined with storage batteries is large, which is difficult to meet the needs of some areas with harsh environments. In the long-term use process, it is easy to cause insufficient power supply in certain periods, resulting in the inability of the equipment to work stably, affecting the reliability of the sensing system.

[0003] On the other hand, transmission lines usually have the characteristics of large span and elevated structure, which makes the conductors prone to periodic vibration. These periodic vibrations occur randomly and disorderly, mainly manifested as breeze vibration in the vertical direction and sub-span oscillation and dancing in the horizontal direction. These vibrations seriously affect the performance and service life of transmission lines. Among them, breeze vibration is the most common form of vibration, and the breeze vibration prevention and control of most lines is controlled by installing anti-vibration devices. However, in recent years, many overhead transmission lines have failed to achieve anti-vibration devices due to breeze vibration, resulting in broken strands or even broken wires, causing heavy losses. The wind speed in Xinjiang, Inner Mongolia and other regions of my country is persistent and uniform, and the breeze vibration intensity of transmission lines is high. The breeze vibration of transmission lines is characterized by high frequency, small amplitude and long duration. The common frequency range is 3Hz to 120Hz, and the amplitude is usually no more than the diameter of the transmission line. With the continuous and vigorous development of overhead transmission lines, more distributed digital monitoring equipment for power systems is needed. The implementation plan of collecting these vibration energies and converting them into electrical energy and using them for self-powered sensing and early warning devices in the transmission line system shows broad potential. At present, the traditional vibration power generation scheme is mainly piezoelectric and electromagnetic. Although it can achieve the collection of vibration energy and vibration reduction when it is directly used in transmission lines, the vibration reduced by energy conversion is generally small and cannot meet the actual needs of current transmission line vibration suppression. In addition, the vibration range of the transmission line is very large, and the energy extraction range of a single electromagnetic / piezoelectric vibration power generation technology is relatively limited. In addition, the frequency and amplitude range of the breeze vibration of the transmission line are wide, and current research makes it difficult to achieve a broadband response for vibration energy collection. Summary of the invention

[0004] Based on this, it is necessary to provide an elastic bistable overhead transmission line power generation device and a line self-power supply method to address the problems of small energy collection range and small vibration frequency response range of energy collection in existing vibration power generation technology, which leads to low power generation efficiency.

[0005] An elastic bistable overhead power transmission line power generation device, comprising a housing, an elastic bistable structure arranged in the housing, and a friction nano power generation unit;

[0006] The elastic bistable structure comprises:

[0007] a cantilever beam having one end connected to the inner wall of the housing and the other end connected to a tip magnet;

[0008] A limiting sleeve connected to the inner wall of the housing, wherein the length direction of the limiting sleeve is perpendicular to the length direction of the cantilever beam, and the limiting sleeve is located on a side close to the tip magnet;

[0009] An elastic magnet is slidably connected to the inner wall of the limiting sleeve; the elastic magnet and the tip magnet are arranged to repel each other, and are used to deflect the cantilever beam through repulsion, and the two deflection positions of the cantilever beam are two stable equilibrium states respectively;

[0010] A dynamic spring, one end of which is connected to the elastic magnet and the other end of which is connected to the housing or the limiting sleeve; the dynamic spring is used to reset the elastic magnet after movement;

[0011] The friction nano power generation unit is located on the deflection path of the cantilever beam; the friction nano power generation unit is used to generate current through the vibration and extrusion of the cantilever beam.

[0012] As a preferred example, at least two elastic bistable structures are provided, and an even number of the elastic bistable structures are symmetrically arranged in the housing.

[0013] As a preferred example, the symmetrically arranged elastic bistable structures share a limiting sleeve, an elastic magnet and a dynamic spring.

[0014] As a preferred example, at least two elastic bistable structures are provided, and the lengths, thicknesses, widths and materials of the multiple cantilever beams are all differently set or the same set.

[0015] As a preferred example, one end of the cantilever beam is connected to the tip magnet through a magnet clamp, and a protrusion is provided on the magnet clamp; a wedge-shaped platform corresponding to the protrusion is provided on one side of the friction nano power generation unit, and the inclined surface of the wedge-shaped platform is arranged perpendicular to the direction of the deflection path of the protrusion.

[0016] As a preferred example, the elastic bistable overhead transmission line power generation device also includes a piezoelectric unit and / or an electromagnetic power generation unit; the piezoelectric unit includes a piezoelectric ceramic, which is arranged on a cantilever beam, and the piezoelectric ceramic is subjected to mechanical stress through the deflection of the cantilever beam to generate current; the electromagnetic power generation unit includes a coil, which is arranged in a limit sleeve, and the current is generated by the movement of an elastic magnet in the coil.

[0017] As a preferred example, the friction nano power generation unit is a vertical contact and separation mode, which includes an upper electrode plate, an intermediate electrode plate and a lower electrode plate stacked in sequence, and the upper electrode plate, the intermediate electrode plate and the lower electrode plate are commonly slidably sleeved with an optical axis, and the optical axis is connected to the outer shell; the upper electrode plate, the intermediate electrode plate and the lower electrode plate are each provided with a support spring, and the support spring is used to isolate different electrode plates and provide elastic force during the contact and separation process of the electrode plates.

[0018] As a preferred example, the number of the friction nano power generation units is twice that of the cantilever beam, and the two friction nano power generation units are arranged at two ends of the deflection path of the same cantilever beam.

[0019] As a preferred example, the outer side wall of the housing is provided with a fixing clip for connecting an overhead power transmission line.

[0020] The present invention also provides a line self-powering method, comprising the following steps:

[0021] Using the elastic bistable overhead power line power generation device as described above to collect the vibration energy of the overhead power line, and convert the vibration energy into electrical energy and output it to the energy storage unit;

[0022] The electric energy in the energy storage unit is used to power the temperature and humidity sensors and / or the obstacle light controllers and / or the aviation obstruction lights in the overhead power transmission lines.

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

[0024] 1. The present invention combines an elastic bistable structure with a friction nano-power generation unit in a vertical contact separation mode to achieve broadband energy collection. The cantilever beam in the elastic bistable structure has two main resonant frequencies within the main frequency range of the breeze vibration of the transmission line, which ensures the bandwidth of the friction nano-generator to collect vibration energy. In order to further improve the energy collection efficiency of the friction nano-power generation unit, the cantilever beam forms an elastic bistable state by introducing an elastic perturbation structure. The elastic bistable form can achieve multiple sub-resonance frequencies outside the main resonant frequency by adjusting the vibration characteristics of the cantilever beam structure in the non-resonance zone. The wider resonance range and multiple sub-resonance frequencies not only ensure the broadband effect of the friction nano-power generation unit in energy collection, improve the vibration frequency response range of the power generation device and broaden the response direction, but also ensure the high performance output of the friction nano-power generation unit.

[0025] 2. The present invention can make the cantilever beam structure exhibit more resonance modes through the combination of multiple cantilever beams of different sizes, thereby further broadening the energy collection band of the friction nano power generation unit and improving the energy collection efficiency.

[0026] 3. The overhead line self-powering method proposed in the present invention can be applied to most friction nano-power generation units for wind energy or vibration energy collection, and has development potential in the field of distributed energy collection and utilization of smart transmission lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the elastic bistable overhead power transmission line power generation device in the embodiment;

[0028] Figure 2 It is a structural schematic diagram of the upper cover plate in the embodiment;

[0029] Figure 3 Schematic diagram of the structure of the lower cover plate in the embodiment;

[0030] Figure 4 is a schematic diagram of the structure of the fixing clip in the embodiment;

[0031] Figure 5 It is a schematic diagram of the internal structure of the elastic bistable overhead power transmission line power generation device in the embodiment;

[0032] Figure 6 It is a structural schematic diagram of the elastic bistable structure in the embodiment;

[0033] Figure 7 A schematic diagram of the structure of a friction nano power generation unit in an embodiment;

[0034] Figure 8 Schematic diagram of the structure of the upper electrode plate in the embodiment;

[0035] Fig. 9 is a schematic structural diagram of the intermediate electrode plate in the embodiment;

[0036] Fig.10 Schematic diagram of the structure of the lower electrode plate in the embodiment;

[0037] Fig.11 It is a schematic diagram of the internal structure of an elastic bistable overhead power transmission line power generation device in another embodiment;

[0038] Fig.12 Flow chart of the line self-powering method in the embodiment.

[0039] In the figure: fixing clamp 1000, upper clamping plate 1100, lower clamping plate 1200, upper cover plate 2000, positioning hole 2100, first slot 2200, housing 3100, optical axis 3200, limiting sleeve 3300, elastic bistable structure 3400, elastic magnet 3410, dynamic spring 3420, tip magnet 3430, magnet clamp 3440, counterweight 3450, cantilever beam 3460, friction Nano power generation unit 3470, support spring 3471, wedge-shaped platform 3472, upper electrode plate 3473, middle electrode plate 3474, lower electrode plate 3475, counterweight plate 3473-10, acrylic plate 3473-20, sponge layer 3473-30, copper film 3473-40, FEP film 3474-10, lower cover plate 4000, bolt hole 4100, second card slot 4200. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0042] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0044] Please refer to Figure 1 This embodiment provides an elastic bistable overhead power transmission line power generation device, which includes a housing, two elastic bistable structures 3400 arranged in the housing, and two friction nano power generation units 3470. The housing includes a shell 3100, an upper cover plate 2000 and a lower cover plate 4000. The shell 3100 is provided with openings at the top and bottom. Figure 2 and Figure 3 As shown, bolt holes 4100 are provided at the four corners of the upper cover plate 2000 and the lower cover plate 4000. A first slot 2200 and a positioning hole 2100 are provided on the side of the upper cover plate 2000 close to the lower cover plate 4000. A second slot 4200 is provided on the side of the lower cover plate 4000 close to the upper cover plate 2000. Extended screws are inserted into the bolt holes 4100 on the upper cover plate 2000 and the lower cover plate 4000, so as to fix the upper cover plate 2000 and the lower cover plate 4000 on the shell 3100 to seal the openings and facilitate the installation of the internal parts of the shell. A fixing clamp 1000 for connecting the overhead transmission line is also provided on the upper cover plate 2000. As shown Figure 4 As shown, the fixing clamp 1000 includes an upper clamping plate 1100 and a lower clamping plate 1200. The lower clamping plate 1200 is fixedly connected to the upper cover plate 2000 by bolts. The upper clamping plate 1100 and the lower clamping plate 1200 can be connected by bolts or by hinges to improve integrity.

[0045] Please refer to Figure 5 and Figure 6The elastic bistable structure 3400 in this embodiment includes a cantilever beam 3460, a limit sleeve 3300, an elastic magnet 3410 and a dynamic spring 3420. The cantilever beam 3460 is a plate-like structure with a certain elasticity, such as a copper substrate. A plurality of slots are provided on the housing 3100. The spacing of the slots can be selected according to actual needs. One end of the cantilever beam 3460 is plugged into one of the slots for fixation. The cantilever beam 3460 selects different positions by selecting different slots for plugging. In this embodiment, the two cantilever beams 3460 are connected to the slots at the same height, that is, the two cantilever beams 3460 are located on the same horizontal plane. The movable end of the two cantilever beams 3460 is fixed with a tip magnet 3430 through a magnet clamp 3440. The magnet clamp 3440 is provided with a counterweight 3450 and a protrusion. The function of the counterweight 3450 is to increase the weight at the end of the cantilever beam 3460 so as to reduce the natural frequency of the cantilever beam 3460 system through physical adjustment to meet the needs of actual work. The raised portion can be designed as a solid cavity or a cavity of other shapes, etc., which can better collide and squeeze with the friction nano power generation unit 3470, and the counterweight 3450 can be conveniently installed inside the raised portion. The setting of the magnet clip 3440 can connect the tip magnet 3430, the counterweight 3450 and the cantilever beam 3460 to achieve a high degree of integration. The upper and lower ends of the limit sleeve 3300 are respectively fixed in the shell through the first slot 2200 and the second slot 4200, and the length direction of the limit sleeve 3300 is set perpendicular to the length direction of the cantilever beam 3460 (vertical direction in this embodiment). It should be mentioned that the fixed ends of the two cantilever beams 3460 are located on opposite sides of the shell 3100, and the two tip magnets 3430 are close to each other. At this time, in order to reduce the space occupied inside the shell, the two elastic bistable structures 3400 can share a limiting sleeve 3300. Of course, it is also possible not to share one, and two slightly smaller limiting sleeves 3300 are set, or the two limiting sleeves 3300 are set side by side and staggered. The elastic magnet 3410 is set on the inner wall of the limiting sleeve 3300 and can be slidably connected. The elastic magnet 3410 is limited in the moving direction by the limiting sleeve 3300, so that the elastic magnet 3410 can only move along the length direction of the limiting sleeve 3300, preventing the elastic magnet 3410 from colliding with the cantilever beam 3460 and causing irreversible damage. One end of the dynamic spring 3420 is connected to the elastic magnet 3410, and the other end is connected to the shell or the limiting sleeve 3300. The dynamic spring 3420 is used to help the elastic magnet 3410 reset after moving. It should be noted that the setting relationship between the elastic magnet 3410 and the two tip magnets 3430. It is required that the elastic magnet 3410 and the two tip magnets 3430 are mutually repelling. The elastic magnet 3410 repels the tip magnet 3430, thereby pushing the cantilever beam 3460 to deflect, so that the cantilever beam 3460 forms an elastic bistable state with a single vibration characteristic.The cantilever beam 3460 in the elastic bistable structure 3400 formed has the characteristics of low rigidity, which can improve the output performance of the power generation device in the low frequency range, thereby widening the response frequency. At the same time, the cantilever beam 3460 has the characteristics of random resonance. The power generation device using this structure shows good output performance in the first-order and second-order resonance point intervals of the cantilever beam 3460. On the other hand, the elastic magnet 3410 and the dynamic spring 3420 form an elastic disturbance member and form a real-time changing magnetic field with the tip magnet 3430 carried by the cantilever beam 3460 on both sides. The cantilever beam 3460 has two main resonance points within the main frequency range of the breeze vibration of the transmission line. The elastic bistable state enables the cantilever beam 3460 structure to exhibit multiple sub-resonance frequencies by adjusting the vibration characteristics of the cantilever beam 3460 in the non-resonance zone without changing the main resonance frequency. The wider resonance frequency band enables the friction nano power generation device to exhibit a wider vibration energy collection frequency band and higher energy output within the main frequency range of the breeze vibration of the transmission line. At the same time, the elastic bistable design can improve the sensitivity of the cantilever beam 3460 and ensure its energy collection efficiency under low frequency and low amplitude conditions. In addition, cantilever beams 3460 with different parameters represent different natural frequencies. In order to better meet the frequency range and durability requirements of actual work, the main parameters such as the length, width, thickness and material of the cantilever beam 3460 are not limited here, and can be selected according to needs. The cantilever beam 3460 can adopt a variety of thickness beam structures. The dynamic spring 3420 can adopt springs of various wire diameters. The combination of cantilever beams 3460 of different thicknesses and dynamic springs 3420 of different wire diameters can produce multiple resonant frequency points, which can widen the frequency response range. One of the design points in the above structure is to combine the resonant frequency of the cantilever beam 3460 with the energy collection process of the friction nano power generation unit 3470 to broaden the energy collection frequency band. Therefore, the cantilever beams 3460 on both sides can adopt the same specifications. Different size combinations can also be used to form resonant frequency combinations of different modes. Multi-modal vibration frequencies can achieve efficient capture of wide-bandwidth and wide-amplitude energy.

[0046] In this embodiment, Figure 7As shown, the friction nano power generation unit 3470 adopts a vertical contact-separation mode friction nano power generation unit 3470 (in addition, an origami-type contact-separation mode and other types may also be adopted), and is arranged on the deflection path of the cantilever beam 3460. The friction nano power generation unit 3470 includes an upper electrode plate 3473, an intermediate electrode plate 3474, and a lower electrode plate 3475 stacked in sequence, as well as an optical axis 3200, a support spring 3471, and a wedge-shaped platform 3472. Four optical axes 3200 can be provided. The four optical axes 3200 are distributed in a rectangular shape, and one end extends into the four connection holes of the upper cover plate 2000 respectively, and the other end is fixedly connected to the lower cover plate 4000. The four corners of the upper electrode plate 3473, the intermediate electrode plate 3474, and the lower electrode plate 3475 are all penetrated on the optical axis 3200. The positioning and guidance of the three electrode plates are achieved through the optical axis 3200. The support spring 3471 is arranged between two electrode plates, and the support spring 3471 can be sleeved on the optical axis 3200 to isolate the three electrode plates and provide elastic force during the contact and separation process of the electrode plates. The elastic force provided by the support spring 3471 can shorten the time of the electrode part in the separation process and improve the response efficiency of the friction nano power generation unit 3470 to external excitation. The cross section of the wedge-shaped platform 3472 can be a right-angled trapezoid or a right-angled triangle. The wedge-shaped platform 3472 is connected to the top of the upper electrode plate 3473 and corresponds to the protrusion on the cantilever beam 3460. The inclined surface of the wedge-shaped platform 3472 should be arranged perpendicular to the direction of the deflection path of the protrusion. Since the cantilever beam 3460 is not straight up and down but deflected during vibration, the cooperation between the wedge-shaped platform 3472 and the protrusion can more efficiently transmit the excitation force generated by the bending of the cantilever beam 3460 during the vibration process to the electrode plate. The three electrode plates are pressed and touched to generate current, which is led out to the outside of the housing by the corresponding wires. For the electrode plate, Figure 8 As shown, the structure of the upper electrode plate 3473 in this embodiment can be set as follows: the pasting order from top to bottom is the counterweight plate 3473-10, the acrylic plate 3473-20, the sponge layer 3473-30 and the copper film 3473-40. The acrylic plate 3473-20 serves as a substrate. The counterweight plate 3473-10 increases the contact force between the electrode plates and the inertial force during the vibration of the electrode plates. The sponge layer 3473-30 serves as a buffer layer to help increase the fit of the copper film 3473-40 and reduce hard contact damage to the copper film 3473-40. Fig. 9As shown, the structure of the intermediate electrode plate 3474 can be set as follows: the pasting order from top to bottom is FEP film 3474-10, copper film 3473-40, sponge layer 3473-30, counterweight plate 3473-10, acrylic plate 3473-20, sponge layer 3473-30, copper film 3473-40 and FEP film 3474-10. That is, except for the counterweight plate 3473-10, the remaining layer structures are symmetrically arranged along the two sides of the acrylic plate 3473-20. Fig.10 As shown, the structure of the lower electrode plate 3475 can be set as follows: the order of pasting from top to bottom is copper film 3473-40, sponge layer 3473-30 and acrylic plate 3473-20. The pasting form of the electrode film is not unique, and the choice of material is not unique. In other embodiments, the number of electrode plates can be two, four or five, and the number is not limited. Electropositive materials include but are not limited to polyamide (nylon), melamine, copper and aluminum. Electronegative materials include but are not limited to rubber, polyethylene, polyimide (Kapton) and polytetrafluoroethylene. The electrode part can also consider using various forms of electrode arrangement such as origami structure to meet the needs of work. The same pair of friction materials that make up a friction nano power generation unit 3470 are polymer materials with triboelectric effect and different electrical polarities, such as nylon, polyimide (Kapton) film, polytetrafluoroethylene (PTFE) film, etc. The conductive material and conductive friction use conductive metal materials, such as copper, aluminum, etc. And the greater the difference in electrical polarity between a pair of friction materials or between a friction material and a conductive friction material, the better the power generation effect.

[0047] In another embodiment, compared with the arrangement of the elastic bistable structure 3400 in the above embodiment, two elastic bistable structures 3400 are also arranged. The difference is that, Fig.11 As shown in the figure (the schematic diagram at B is a side view of the schematic diagram at A), the fixed ends of the two cantilever beams 3460 are set in the middle of the shell, and the two tip magnets 3430 are arranged from the center of the shell to the two sides. The two sides of the shell are provided with a limit sleeve 3300 and an elastic magnet 3410 corresponding to the tip magnet 3430. Compared with the structural arrangement in the above embodiment, the performance impact that may be caused by the shared elastic magnet 3410 can be reduced.

[0048] In another embodiment, compared with the first embodiment, other structures remain unchanged, and the friction nano power generation units 3470 can be arranged at the upper and lower parts of the cantilever beam 3460 at the same time. They only need to be on the deflection path of the cantilever beam 3460. In this case, the number of the friction nano power generation units 3470 is twice that of the cantilever beam 3460, so as to improve the space utilization of the friction nano power generation units 3470.

[0049] In other embodiments, compared with the above embodiments, other structures remain unchanged. However, the number of the elastic bistable structures 3400 is not limited to two. Two or more elastic bistable structures 3400 may be arranged side by side in a widened manner along the width direction of the cantilever beam 3460, or may be arranged in a long-length direction of the cantilever beam 3460, or may be arranged in a stacked and heightened manner along the thickness direction of the cantilever beam 3460. All of the above methods can achieve the effect of increasing the power generation.

[0050] In other embodiments, compared with the above embodiments, the elastic bistable overhead transmission line power generation device may be additionally provided with a piezoelectric unit or an electromagnetic power generation unit. The additional piezoelectric unit includes a piezoelectric ceramic. The piezoelectric ceramic is arranged on the cantilever beam 3460, and the piezoelectric ceramic is subjected to mechanical stress and generates current through the deflection of the cantilever beam 3460. According to the power generation principle of the piezoelectric unit, other types of piezoelectric structures may also be provided, such as piezoelectric single crystals (quartz crystals, lithium niobate, lithium tantalate, etc.) and organic piezoelectric films (such as polyvinylidene fluoride PVDF), etc. The corresponding adaptation settings are made according to the specific piezoelectric structure, and no further details are given here. The additional electromagnetic power generation unit includes a coil. The coil is arranged in the limit sleeve 3300, and the elastic magnet 3410 moves in the coil to generate current. The above method further improves the collection efficiency of vibration energy.

[0051] In another embodiment, a method for self-powering an overhead line is also proposed, such as Fig.12 As shown, it includes the following steps:

[0052] Using the elastic bistable overhead power transmission line power generation device as described in any of the above embodiments, according to the vibration characteristics and range of the transmission line, the cantilever beam 3460 structure is used to collect the vibration energy of the transmission line and convert it into mechanical energy at the friction nano power generation unit 3470, and then the friction nano power generation unit 3470 converts the mechanical energy into electrical energy and outputs it to the energy storage unit for storage;

[0053] The electric energy in the energy storage unit is used to power low-power devices and micro sensors such as temperature and humidity sensors, wire high-temperature wireless warning equipment, obstacle light controllers, and aviation obstacle lights in overhead transmission lines. It provides energy support for self-powered online monitoring of temperature and humidity of transmission lines, self-powered high-temperature wireless warning of transmission lines, and self-powered tower obstacle warning (aviation obstacle lights). The application in smart transmission lines provides a more complete implementation plan and has development potential in the field of distributed energy collection and utilization of smart transmission lines.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An elastic bistable overhead power transmission line power generation device, characterized in that: It comprises a shell, an elastic bistable structure (3400) arranged inside the shell, and a friction nanometer power generation unit (3470); the outer side wall of the shell is provided with a fixing clip (1000) for connecting an overhead power transmission line; At least two of the elastic bistable structures (3400) are provided, and an even number of the elastic bistable structures (3400) are symmetrically arranged in the housing; the elastic bistable structure (3400) comprises: A cantilever beam (3460), one end of which is connected to the inner wall of the housing and the other end of which is connected to a tip magnet (3430); A limiting sleeve (3300) connected to the inner wall of the housing, the length direction of the limiting sleeve (3300) being perpendicular to the length direction of the cantilever beam (3460), and the limiting sleeve (3300) being located on a side close to the tip magnet (3430); an elastic magnet (3410) which is slidably connected to the inner wall of the limiting sleeve (3300); the elastic magnet (3410) and the tip magnet (3430) are arranged to repel each other, and are used to deflect the cantilever beam (3460) through repulsive force, and the two deflection positions of the cantilever beam (3460) are two stable equilibrium states respectively; A dynamic spring (3420), one end of which is connected to the elastic magnet (3410), and the other end of which is connected to the housing or the limiting sleeve (3300); the dynamic spring (3420) is used to reset the elastic magnet (3410) after movement; The friction nano power generation unit (3470) is located on the deflection path of the cantilever beam (3460); the friction nano power generation unit (3470) is used to generate current through the vibration and extrusion of the cantilever beam (3460).

2. The elastic bistable overhead power transmission line power generation device according to claim 1, characterized in that: The symmetrically arranged elastic bistable structures (3400) share a limiting sleeve (3300), an elastic magnet (3410) and a dynamic spring (3420).

3. The elastic bistable overhead power transmission line power generation device according to claim 1, characterized in that: At least two of the elastic bistable structures (3400) are provided, and the lengths, thicknesses, widths and materials of the multiple cantilever beams (3460) are all differently set or the same.

4. The elastic bistable overhead power transmission line power generation device according to claim 1, characterized in that: One end of the cantilever beam (3460) is connected to the tip magnet (3430) via a magnet clamp (3440), and a protrusion is provided on the magnet clamp (3440); a wedge-shaped platform (3472) corresponding to the protrusion is provided on one side of the friction nano power generation unit (3470), and the inclined surface of the wedge-shaped platform (3472) is arranged perpendicular to the direction of the deflection path of the protrusion.

5. The elastic bistable overhead power transmission line power generation device according to claim 1, characterized in that: The elastic bistable overhead power transmission line power generation device further comprises a piezoelectric unit and / or an electromagnetic power generation unit; the piezoelectric unit comprises a piezoelectric ceramic, the piezoelectric ceramic is arranged on a cantilever beam (3460), and the piezoelectric ceramic is subjected to mechanical stress through the deflection of the cantilever beam (3460) to generate current; the electromagnetic power generation unit comprises a coil, the coil is arranged in a limiting sleeve (3300), and the elastic magnet (3410) moves in the coil to generate current.

6. The elastic bistable overhead power transmission line power generation device according to claim 1, characterized in that: The friction nano power generation unit (3470) is in a vertical contact and separation mode, and comprises an upper electrode plate (3473), an intermediate electrode plate (3474) and a lower electrode plate (3475) which are stacked in sequence, wherein an optical axis (3200) is slidably sleeved on the upper electrode plate (3473), the intermediate electrode plate (3474) and the lower electrode plate (3475), and the optical axis (3200) is connected to the outer shell; and support springs (3471) are arranged between the upper electrode plate (3473), the intermediate electrode plate (3474) and the lower electrode plate (3475), and the support springs (3471) are used to isolate different electrode plates and provide elastic force during the contact and separation process of the electrode plates.

7. The elastic bistable overhead power transmission line power generation device according to claim 1, characterized in that: The number of the friction nano power generation units (3470) is twice that of the cantilever beam (3460), and the two friction nano power generation units (3470) are arranged at the two ends of the deflection path of the same cantilever beam (3460).

8. A line self-powering method, characterized in that: The following steps are involved: Using the elastic bistable overhead power transmission line power generation device as claimed in any one of claims 1 to 7 to collect the vibration energy of the overhead power transmission line, and convert the vibration energy into electrical energy and output it to the energy storage unit; The electric energy in the energy storage unit is used to power the temperature and humidity sensors and / or the obstacle light controllers and / or the aviation obstruction lights in the overhead power transmission lines.

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