An elastic string type element vibration sensor based on a friction nanogenerator

Abstract

This invention proposes an innovative vibration sensor based on a triboelectric nanogenerator using an elastic rope element. Leveraging the high sensitivity and low cost of the elastic rope element, it achieves self-powered vibration monitoring. The sensor effectively captures low-frequency and minute vibrations by stretching and relaxing the elastic rope element, combined with the contact electrification effect of the triboelectric nanogenerator, and converts them into electrical signals. Its unique design not only simplifies the structure but also improves the sensor's environmental adaptability, making it particularly suitable for fields such as the Internet of Things and mechanical fault monitoring. The elastic rope element of this invention features small radial dimensions, allows for multiple arrangements in the same plane, has low mass, good water resistance, low cost, and is easy to integrate, bringing a new breakthrough to vibration sensing technology.

Description

Technical Field

[0001] This invention relates to the field of triboelectric nanogenerator sensor technology, and in particular to a vibration sensor based on a triboelectric nanogenerator elastic rope element. Background Technology

[0002] Vibration monitoring plays a crucial role in mechanical fault diagnosis, structural health monitoring, and environmental monitoring. With the rapid development of the Internet of Things (IoT) technology, the demand for miniaturized, portable, and integrated electronic devices is increasing, placing higher demands on portable energy devices and efficient sensor technologies. Traditional vibration sensors, such as electromagnetic induction and piezoelectric sensors, have been applied in various fields, but they often suffer from limitations such as complex structures, the need for high-cost materials, poor response to low-frequency vibrations, or the requirement for external power supplies. Meanwhile, existing vibration sensors based on triboelectric nanogenerators use elastic elements that are large, expensive, and insensitive to minute vibrations. Therefore, there is an urgent need to develop a new type of vibration sensor that is low-cost, miniaturized, self-powered, and sensitive to low-frequency, minute vibrations to meet the growing demand for IoT and self-powered sensors. Summary of the Invention

[0003] In view of this, the present invention provides a vibration sensor based on a triboelectric nanogenerator and an elastic rope element. The sensor based on the triboelectric nanogenerator is self-powered and does not require additional power consumption. The elastic rope element can generate good elasticity while having a small radial dimension, and at the same time has better response sensitivity to small vibrations.

[0004] Therefore, the technical solution adopted by the present invention is as follows: This invention provides a vibration sensor based on a triboelectric nanogenerator using an elastic rope element, comprising an outer elastic rope element holder, an inner elastic rope element holder, a weight, an elastic rope element, a side cylinder, a base, a vibration element, an upper top plate, and a lower top plate.

[0005] The elastic element is fixed by passing through the outer elastic rope element fixer and the inner elastic rope element fixer in the vibration element respectively; the side cylinder is fixedly connected to the outer elastic rope element fixer and the base at the top and bottom respectively; the vibration element includes the inner elastic rope element fixer, the weight, the upper top plate and the lower top plate.

[0006] Preferably, the outer elastic rope element fixator is made of PLA material, and its side wall has an array of holes through which the elastic rope element passes to achieve the fixing effect; a fixing groove is provided below the outer elastic rope element fixator, and a section of the side tube is placed into the fixing groove to achieve the fixing effect.

[0007] Preferably, the side tube is made of transparent acrylic material, which allows for easy monitoring of internal vibrations.

[0008] Preferably, the vibrating element consists of an inner elastic rope element holder, a weight, an upper top plate, and a lower top plate. The inner elastic rope element holder has a circular array of holes to facilitate the passage and fixation of the elastic rope element. The weight is in the shape of a ring to facilitate the addition or removal of weights to accommodate the elastic rope element. The lower top plate is covered with copper electrodes and a nylon film.

[0009] Preferably, the base is made of PLA material, and copper electrodes and a nylon film are disposed on it.

[0010] Preferably, under vibration conditions, the elastic rope element connecting the outer elastic rope element fixation device and the inner elastic rope element fixation device is stretched and relaxed, causing the vibration element to move up and down. At the same time, the copper electrode and nylon film forming the ground electrode under the lower top plate of the vibration element and the copper electrode and FEP film forming the lower electrode on the base come into contact with each other, generating an electrical signal.

[0011] The beneficial effects of this invention are as follows: (1) This invention is based on contact electrification using a triboelectric nanogenerator, which has the advantages of low cost and high sensitivity. Simultaneously, the principle of contact separation caused by vibration utilizes the stretching and relaxing of an elastic rope element. This elastic rope element is sensitive to minute vibrations, so even slight vibrations will cause contact separation and generate an electrical signal. Therefore, this invention has a sensitive ability to sense external vibrations.

[0012] (2) Compared with using springs as elastic elements, the elastic rope element in this invention has the advantages of small radial volume, low cost and easy arrangement. At the same time, the elastic rope element can be arranged in a circumferential array in a plane, which increases the stability of the sensor.

[0013] (3) The main material of the elastic rope element in this invention is nylon rope, which has the characteristics of being lightweight, wear-resistant, high-strength, water-resistant, and soft, thus improving the sensor's ability to adapt to the environment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1This is one of the overall structural schematic diagrams of an elastic rope-type element vibration sensor based on a triboelectric nanogenerator in an embodiment of the present invention; Figure 2 This is one of the cross-sectional schematic diagrams of an elastic rope-type element vibration sensor based on a triboelectric nanogenerator in an embodiment of the present invention; Figure 3 This is the second schematic diagram of the overall structure of a vibration sensor based on a triboelectric nanogenerator elastic rope element in an embodiment of the present invention; Figure 4 This is a schematic diagram of the vibration element structure of an elastic rope-type vibration sensor based on a triboelectric nanogenerator in an embodiment of the present invention. Figure 5 This is a schematic diagram illustrating the working process of an elastic rope-type vibration sensor based on a triboelectric nanogenerator in an embodiment of the present invention. Figure 6 This is a schematic diagram of electron flow in an elastic rope-type element vibration sensor based on a triboelectric nanogenerator in an embodiment of the present invention. Figure 7 This is a vibration monitoring voltage waveform diagram of an elastic rope-type element vibration sensor based on a triboelectric nanogenerator in an embodiment of the present invention. In the diagram, 1. Outer elastic rope element holder; 2. Side cylinder; 3. Base; 4. Vibration element; 5. Elastic rope element; 4-1. Inner elastic rope element holder; 4-2. Upper top plate; 4-3. Lower top plate; 4-4. Weight. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art through creative effort should fall within the scope of protection of the present invention.

[0017] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0018] like Figure 1 As shown in the figure, the elastic rope element vibration sensor based on a triboelectric nanogenerator provided in this embodiment of the invention mainly includes an outer elastic rope element holder 1; a side cylinder 2; and a base 3. The two ends of the side cylinder 2 are fixedly connected to the outer elastic rope element holder 1 and the base, respectively.

[0019] like Figure 1-4 As shown, the two ends of the elastic rope element 5 pass through the outer elastic rope element fixer 1 and the inner elastic rope element fixer 4-1 of the vibration element 4 respectively to fix the elastic rope element.

[0020] like Figure 1 , Figure 4 , Figure 5 As shown, the inner elastic rope element holder 4-1 has weights 4-4 fixed above and below it for counterweighting the vibration sensor. An upper top plate 4-2 and a lower top plate 4-3 are also provided on the outside of the weights 4-4 to restrict their movement. The lower top plate 4-3 is also equipped with copper electrodes and a nylon film for generating electrical signals. The base 3 is also equipped with copper electrodes and an FEP film for generating electrical signals.

[0021] like Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the physical mechanism of the vibration sensor is as follows: under the action of external vibration, the vibration element 4 will move up and down under the fixation of the elastic rope element 5. The copper electrode on the lower top plate 4-3 and the nylon film will separate from the copper electrode on the base 3 and the FEP film, which will change the potential difference and generate electron flow.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vibration sensor based on a triboelectric nanogenerator and an elastic rope element, characterized in that... include: An outer elastic rope element holder (1) is provided with an array of holes for passing through and fixing the elastic rope element (5), and a fixing groove is provided below the outer elastic rope element holder (1). An inner elastic rope element fixer (4-1) is provided inside the vibrating element (4), and has holes arranged in a circumferential array for passing through and fixing the elastic rope element (5). The elastic rope element (5) passes through the outer elastic rope element fixator (1) and the inner elastic rope element fixator (4-1) respectively to achieve elastic fixation; The side tube (2) is made of transparent acrylic material. Its upper and lower ends are fixedly connected to the outer elastic rope element fixer (1) and the base (3) respectively. One end of the side tube (2) is placed in the fixing groove of the outer elastic rope element fixer (1) to achieve fixation. The base (3) has a lower electrode composed of a copper electrode and a nylon film on its upper part; The vibrating element (4) includes an inner elastic rope element holder (4-1), a weight, an upper top plate (4-2) and an upper top plate (4-3), wherein the upper top plate (4-3) is covered with an upper electrode composed of a copper electrode and a nylon film, and the weight is in the shape of a ring to accommodate the adjustment of the elastic rope element (5); Weights (4-4) are placed inside the vibrating element (4) to adjust the weight and sensitivity of the vibrating element (4); The upper top plate (4-2) and the upper top plate (4-3) are located at the upper and lower ends of the vibration element (4) respectively, and together with the inner elastic rope element fixation device (4-1), they constitute the overall structure of the vibration element (4).

2. The vibration sensor according to claim 1, characterized in that, Under vibration conditions, the elastic rope element (5) will be stretched and relaxed, causing the vibration element (4) to move up and down. At the same time, the upper electrode below the top plate (4-3) of the vibration element (4) and the lower electrode on the base (3) will come into contact with each other and separate, thereby generating an electrical signal.

3. The vibration sensor according to claim 1, characterized in that, The arrangement of the elastic rope element (5) includes, but is not limited to, multiple parallel arrangements in the same plane, which enables the sensor to cover a larger monitoring area or improve the sensitivity to vibrations in a specific direction.

4. The vibration sensor according to claim 1, characterized in that, The main material of the elastic rope element (5) is nylon rope, which has the characteristics of being lightweight, wear-resistant, high-strength, water-resistant, and soft, thus improving the sensor's environmental adaptability.

5. The vibration sensor according to claim 1, characterized in that, The outer elastic rope element fixer (1) has a certain number of holes arranged in a circumferential array on its side wall to facilitate the connection and fixation of the elastic rope element (5). The inner elastic rope element fixer (4-1) has holes arranged in a circumferential array to facilitate the connection and fixation of the other end of the elastic rope element (5).

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