Self-powered vibration sensor based on friction nanometer generator

Abstract

The utility model provides a self-powered vibration sensor based on a friction nanometer generator, and the sensor comprises a vibration sensor body which comprises a housing; the sleeve is arranged on the shell in a sleeving manner, and a mounting cavity is defined between the sleeve and the shell; the friction nanometer generator is arranged in the mounting cavity, the friction nanometer generator comprises a first dielectric film, a second dielectric film and a moving assembly, the second dielectric film is arranged on the shell, the moving assembly comprises a lantern ring and an elastic piece, the lantern ring movably sleeves the shell, the first dielectric film is arranged on the lantern ring and is in contact fit with the second dielectric film, and the elastic piece is arranged on the first dielectric film. The two ends of the elastic piece are connected to the lantern ring and the sleeve respectively. According to the self-powered vibration sensor based on the friction nanometer generator, the structure of the friction nanometer generator is simple, the friction nanometer generator can adjust the power generation friction area according to the vibration amplitude of a product tested by the vibration sensor, and the power generation amount of the friction nanometer generator can be improved.

Description

Technical Field

[0001] This utility model generally relates to the field of vibration sensor technology, and specifically to a self-powered vibration sensor based on a triboelectric nanogenerator. Background Technology

[0002] Vibration sensors are used to measure the vibration data of an object under test by mounting it on the object. Chinese Patent (Application No. 202320595536.7) discloses a self-powered vibration sensor based on a triboelectric nanogenerator. The self-powered vibration sensor collects vibration energy through a triboelectric nanogenerator, which converts vibration into sliding friction. Combined with an energy storage unit, it realizes the self-powering of the sensing system.

[0003] However, the aforementioned self-powered vibration sensors suffer from the problem of complex structures in triboelectric nanogenerators. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a self-powered vibration sensor based on a triboelectric nanogenerator.

[0005] This application provides a self-powered vibration sensor based on a triboelectric nanogenerator, comprising:

[0006] The vibration sensor body includes a cylindrical outer shell;

[0007] A sleeve is fitted around the outer periphery of the outer shell, and an installation cavity is formed between the sleeve and the outer shell;

[0008] The triboelectric nanogenerator is disposed in the mounting cavity. The triboelectric nanogenerator includes a first dielectric film, a second dielectric film, and a moving component. The second dielectric film is disposed in the outer shell. The moving component includes a collar and an elastic element. The collar is movably sleeved in the outer shell. The first dielectric film is disposed in the collar and contacts and cooperates with the second dielectric film. The two ends of the elastic element are respectively connected to the collar and the sleeve.

[0009] Furthermore, the elastic element is disposed on the axially upward side of the collar, and the elastic element is compressed between the collar and the sleeve.

[0010] Furthermore, the sleeve is provided with a pusher, which is located on the side of the elastic element away from the collar. The elastic element is compressed between the pusher and the collar. The pusher is used to adjust the position of the moving component.

[0011] Furthermore, the jacking component is movably positioned along the axial direction of the collar.

[0012] Furthermore, the movable component also includes a support ring, which is movably sleeved on the outer periphery of the housing and located on the side of the elastic member away from the sleeve. The support ring has a receiving hole and the elastic member is received in the receiving hole. The pusher is located on the side of the support ring away from the elastic member and is pushed and engaged with the support ring.

[0013] The self-powered vibration sensor based on triboelectric nanogenerator provided in this application not only simplifies the structure of the triboelectric nanogenerator, but also enables the triboelectric nanogenerator to adjust the power generation friction area according to the vibration amplitude of the product tested by the vibration sensor, which helps to improve the power generation of the triboelectric nanogenerator. Attached Figure Description

[0014] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0015] Figure 1 This is a half-sectional schematic diagram of a self-powered vibration sensor provided in an embodiment of this application. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0017] Please refer to the attached document. Figure 1 This application provides a self-powered vibration sensor based on a triboelectric nanogenerator, including a vibration sensor body 100, a sleeve 200, and a triboelectric nanogenerator. The vibration sensor body 100 includes a cylindrical outer shell 110. The sleeve 200 is sleeved on the outer periphery of the outer shell 110, and a mounting cavity is formed between the sleeve 200 and the outer shell 110. The triboelectric nanogenerator is disposed in the mounting cavity. The triboelectric nanogenerator includes a first dielectric film 120, a second dielectric film 130, and a moving component. The second dielectric film 130 has a second electrode on the side near the outer shell 110 and is bonded to the outer surface of the outer shell 110. The moving component includes a collar 140 and an elastic element 150. The collar 140 is movably sleeved on the outer shell 110 and can move axially relative to the outer shell 110. The first dielectric film 120 has a first electrode on the side near the collar 140 and is bonded to the inner side of the collar 140. The first dielectric film 120 and the second dielectric film 130 are in contact and engaged. The two ends of the elastic element 150 are respectively connected to the collar 140 and the sleeve 200.

[0018] When the vibration sensor body 100 is mounted on the product under test, the vibration sensor also vibrates axially under the influence of the product under test. During vibration, due to the hysteresis of the moving components, relative movement occurs between the collar 140 and the vibration sensor body 100. This relative movement causes friction between the first dielectric film 120 and the second dielectric film 130. Current is generated when the first dielectric film 120 and the second dielectric film 130 separate from each other, thus realizing the generation of a triboelectric nanogenerator. The aforementioned triboelectric nanogenerator and the vibration sensor body 100 are integrated together, and the triboelectric nanogenerator has a simple structure.

[0019] The current generated by the triboelectric nanogenerator is stored in the energy storage capacitor through a rectifier circuit, and then the energy storage capacitor powers the vibration sensor body 100.

[0020] It should be understood that triboelectric nanogenerators generate electricity through triboelectricity, which is a well-known prior art in the field, and this application will not elaborate on it.

[0021] Among them, the elastic element 150 can be, but is not limited to, a spring.

[0022] In some embodiments of this application, the elastic element 150 is disposed on one side of the collar 140 along the axial direction, and the elastic element 150 is compressed between the collar 140 and the sleeve 200, wherein the elastic element 150 provides load-bearing support for the collar 140.

[0023] Optionally, the movable assembly further includes a support ring 170, which is movably sleeved on the outer periphery of the housing 110 and located on the side of the elastic member 150 away from the collar 140. The support ring 170 has a receiving hole, and the elastic member 150 is received in the receiving hole. A pusher is located on the side of the support ring 170 away from the elastic member 150 and pushes against the support ring 170. The pusher is movably disposed along the axial direction of the housing 110.

[0024] The push rod 160 is a push screw, and the sleeve 200 has a threaded connection through hole. The push screw is screwed into the threaded connection through hole and extends into the mounting cavity. The axial direction of the push screw is parallel to the axial direction of the outer shell 110. The bearing ring 170 has a ball bearing mounting hole at one end near the push rod 160. A ball bearing is welded to one end of the push screw, and the ball bearing is movably embedded in the ball bearing mounting hole. By rotating the push screw, the movement of the adjustment component along the axial direction of the outer shell 110 is realized. When the position of the adjustment component along the axial direction of the outer shell 110 is adjusted, that is, the first dielectric film 120 moves relative to the second dielectric film 130, the relative contact area between the first dielectric film 120 and the second dielectric film 130 changes. This allows the triboelectric nanogenerator to adjust the power generation friction area according to the vibration amplitude of the product tested by the vibration sensor, which helps to improve the power generation of the triboelectric nanogenerator.

[0025] Among them, there can be multiple elastic elements 150, which are spaced apart circumferentially along the outer shell 110. The bearing ring 170 is provided with receiving holes corresponding to the multiple elastic elements 150. The multiple elastic elements 150 are received in the multiple receiving holes, and one end of the elastic element 150 extends out of the receiving hole and contacts the collar 140.

[0026] The outer circumferential surfaces of the bearing ring 170 and the collar 140 are in contact with the inner circumferential surface of the sleeve 200 to restrict the axial movement of the bearing ring 170 and the collar 140 along the outer shell 110.

[0027] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A self-powered vibration sensor based on a triboelectric nanogenerator, characterized in that, include: A vibration sensor body, the vibration sensor body comprising a cylindrical outer shell; A sleeve is fitted around the outer periphery of the outer shell, and an installation cavity is formed between the sleeve and the outer shell; A triboelectric nanogenerator is disposed in the mounting cavity. The triboelectric nanogenerator includes a first dielectric film, a second dielectric film, and a movable component. The second dielectric film is disposed in the outer shell. The movable component includes a collar and an elastic element. The collar is movably sleeved on the outer shell. The first dielectric film is disposed in the collar and contacts and cooperates with the second dielectric film. The two ends of the elastic element are respectively connected to the collar and the sleeve.

2. The self-powered vibration sensor based on a triboelectric nanogenerator according to claim 1, characterized in that, The elastic element is disposed on one side of the collar along the axial direction, and the elastic element is compressed between the collar and the sleeve.

3. The self-powered vibration sensor based on a triboelectric nanogenerator according to claim 2, characterized in that, The sleeve is provided with a pusher, which is located on the side of the elastic member away from the collar. The elastic member is compressed between the pusher and the collar. The pusher is used to adjust the position of the moving component.

4. The self-powered vibration sensor based on a triboelectric nanogenerator according to claim 3, characterized in that, The jacking member is movably disposed along the axial direction of the collar.

5. The self-powered vibration sensor based on a triboelectric nanogenerator according to claim 4, characterized in that, The movable component further includes a support ring, which is movably sleeved on the outer periphery of the housing and located on the side of the elastic member away from the sleeve. The support ring has a receiving hole and the elastic member is received in the receiving hole. The pushing member is located on the side of the support ring away from the elastic member and is pushed and engaged with the support ring.

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