A sealed pressure sensor based on a frictional nanogenerator

Abstract

The application belongs to the technical field of sensors and provides a sealed pressure sensor based on a friction nanogenerator, which comprises a first bearing flange and a second bearing flange and further comprises: an upper cover plate fixedly connected with the first bearing flange; an insulating film pasted on the lower surface of the upper cover plate; a copper film electrode pasted on the lower surface of the insulating film; a dielectric layer pasted on the lower surface of the copper film electrode; and a pressure-sensitive ball in a three-dimensional elliptical shape and fixedly arranged in the interior of the first bearing flange, wherein the interior of the pressure-sensitive ball is in a hollow state, the bottom of the pressure-sensitive ball is provided with a through hole to form a cavity. The application can realize the detection of the pressure condition in the interior of a sealed device and simultaneously realize the real-time monitoring of the leakage condition of the sealed device by the change of the contact area between the upper part of the pressure-sensitive ball and the dielectric layer to generate a changed voltage, and the application has a wide application prospect due to the reduced cost.

Description

Technical Field

[0001] This invention belongs to the field of sensor technology, and particularly relates to a sealed pressure sensor based on a triboelectric nanogenerator. Background Technology

[0002] With the widespread use of mechanical seals, their applications are increasing. However, seal leaks can impact and even damage sealing devices and related instruments. While various methods exist for detecting leaks and pressure in sealing devices, including visual inspection, pressure testing, thermal imaging, and ultraviolet light inspection, most suffer from low accuracy and high cost. Triboelectric nanogenerators (TGNs) offer a novel way to convert mechanical energy into electrical energy. By utilizing the contact between two materials with different electron-gathering and electron-losing capabilities, surface charge transfer occurs, converting the widely available mechanical energy in the natural environment into electrical energy to power small electronic devices such as portable devices. Using TGNs for seal pressure and leak detection enables self-powered detection.

[0003] Existing triboelectric nanogenerators have a simple structure and cannot detect pressure and leakage in sealed devices. Furthermore, the high manufacturing requirements for triboelectric nanogenerators in current technologies indirectly increase costs, making them unsuitable for industrial applications. Therefore, we propose a sealing pressure sensor based on a triboelectric nanogenerator. Summary of the Invention

[0004] The purpose of this invention is to provide a sealed pressure sensor based on a triboelectric nanogenerator, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A sealed pressure sensor based on a triboelectric nanogenerator includes a first bearing flange and a second bearing flange. The first bearing flange has a through hole at its center; the second bearing flange also has a through hole at its center. The second bearing flange is hollow and is used to connect to a sensing element. The sensor also includes: The upper cover plate is fixedly connected to the first bearing flange. The upper cover plate is generally disc-shaped and serves as a carrier for the insulating film. An insulating film is attached to the lower surface of the upper cover plate; A copper film electrode, wherein the copper film electrode is attached to the lower surface of an insulating film; A dielectric layer is attached to the lower surface of a copper film electrode; The pressure-sensitive ball is generally three-dimensionally elliptical and is fixedly installed inside the first bearing flange. The inside of the pressure-sensitive ball is hollow, and the bottom of the pressure-sensitive ball has a through hole to form a cavity.

[0006] Furthermore, the transverse diameter of the pressure-sensitive ball is equal to the inner diameter of the first bearing flange.

[0007] Furthermore, the pressure-sensitive ball is a hollow silicone ball.

[0008] Furthermore, the first bearing flange is flange-shaped in general, with a boss on the upper part of the first bearing flange, and eight through holes are evenly distributed on the outer side of the base of the first bearing flange.

[0009] Furthermore, the second bearing flange is flange-shaped in general, with a boss at the bottom and eight through holes evenly distributed on the outer side of the top seat of the second bearing flange.

[0010] Furthermore, it also includes fixing bolts and fixing nuts, and the first and second bearing flanges are connected by fixing bolts and fixing nuts.

[0011] Furthermore, the insulating film, copper film electrode, and dielectric layer are all circular thin films, and the diameters of the insulating film, copper film electrode, and dielectric layer are all the same.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This triboelectric nanogenerator-based sealed pressure sensor generates varying voltages by changing the contact area between the upper part of the pressure-sensitive sphere and the dielectric layer. This enables the detection of internal pressure within a sealed device and allows for real-time monitoring of leaks. Utilizing the characteristics of triboelectric nanogenerators, the sealed pressure sensor can achieve self-powered operation, reducing costs and demonstrating broad application prospects. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is an anatomical diagram of the three-dimensional structural parts of the present invention.

[0015] Figure 3 This is a three-dimensional sectional disassembly diagram of the present invention.

[0016] Figure 4 This is a schematic diagram illustrating the charge transfer principle of the present invention.

[0017] Figure 5 This is a voltage output diagram of the present invention after five consecutive applications of different pressures.

[0018] In the diagram: 1-Upper cover plate; 2-First bearing flange; 3-Insulating film; 4-Copper film electrode; 5-Dielectric layer; 6-Pressure sensitive ball; 7-Second bearing flange; 8-Fixing bolt; 9-Fixing nut. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0021] like Figure 1-3 As shown, a sealed pressure sensor based on a triboelectric nanogenerator is provided in one embodiment of the present invention, including a first bearing flange 2 and a second bearing flange 7. The first bearing flange 2 has a through hole at its center; the second bearing flange 7 has a through hole at its center, and the second bearing flange 7 is hollow overall for connecting to a detection element. It also includes: The upper cover plate 1 is fixedly connected to the first bearing flange 2. The upper cover plate 1 is generally disc-shaped and serves as a carrier for the insulating film 3. Insulating film 3, the insulating film 3 is pasted on the lower surface of the upper cover plate 1; A copper film electrode 4 is attached to the lower surface of the insulating film 3; Dielectric layer 5 is attached to the lower surface of copper film electrode 4; The pressure-sensitive ball 6 is generally three-dimensionally elliptical and is fixedly installed inside the first bearing flange 2. The inside of the pressure-sensitive ball 6 is hollow, and the bottom of the pressure-sensitive ball 6 has a through hole to form a cavity.

[0022] In this embodiment of the invention, preferably, the upper cover plate 1 is fixedly connected to the first bearing flange 2 by sealant. The insulating film 3, the copper film electrode 4, and the dielectric layer 5 are all bonded with solid adhesive. The function of the insulating film 3 is to prevent electronic signals from being transferred through the titanium alloy, causing voltage signal instability or distortion. The copper film electrode 4, the dielectric layer 5, and the pressure-sensitive ball 6 constitute the basic structure of the single-electrode working mode of the triboelectric nanogenerator. The upper cover plate 1, the first bearing flange 2, and the second bearing flange 7 are all made of titanium alloy, and the dielectric layer 5 is made of polytetrafluoroethylene.

[0023] like Figure 2 and Figure 3 As shown, in a preferred embodiment of the present invention, the transverse diameter of the pressure-sensitive ball 6 is equal to the inner wall diameter of the first bearing flange 2.

[0024] In a preferred embodiment of the invention, the pressure-sensitive ball 6 is placed inside the upper bearing flange 2.

[0025] like Figure 2 and Figure 3 As shown, in a preferred embodiment of the present invention, the pressure-sensitive ball 6 is a hollow silicone ball.

[0026] In this embodiment of the invention, preferably, the material of the pressure-sensitive ball 6 can be adjusted according to different detection devices and the maximum target detection pressure. Specifically, when the sealed pressure sensor based on the triboelectric nanogenerator is working, the gas in the detection device enters through the second bearing flange 7, and then the gas enters the first bearing flange 2. As the gas pressure increases, the gas will exert a compressive force on the pressure-sensitive ball 6. Since the pressure-sensitive ball 6 is a hollow sphere and has a through hole at its bottom, the gas pressure will first enter the hollow part of the pressure-sensitive ball 6. As the pressure increases, the contact area between the upper part of the pressure-sensitive ball 6 and the dielectric layer 5 also increases.

[0027] like Figure 1 and Figure 2 As shown, in a preferred embodiment of the present invention, the first bearing flange 2 is generally flange-shaped, the upper part of the first bearing flange 2 is provided with a boss, and eight through holes are evenly distributed on the outer side of the base of the first bearing flange 2.

[0028] In a preferred embodiment of the invention, the eight through holes on the outer side of the base of the first bearing flange 2 are circumferentially distributed.

[0029] like Figure 1 and Figure 2 As shown, in a preferred embodiment of the present invention, the second bearing flange 7 is generally flange-shaped, the lower part of the second bearing flange 7 is provided with a boss, and eight through holes are evenly distributed on the outer side of the top seat of the second bearing flange 7.

[0030] In a preferred embodiment of the invention, the eight through holes on the outer side of the top seat of the second bearing flange 7 are circumferentially distributed.

[0031] like Figure 1-3 As shown, in a preferred embodiment of the present invention, it further includes fixing bolts 8 and fixing nuts 9, and the first bearing flange 2 and the second bearing flange 7 are connected by fixing bolts 8 and fixing nuts 9.

[0032] In a preferred embodiment of the invention, the fixing bolt 8 passes through the through hole on the outer side of the base of the first bearing flange 2 and the through hole on the outer side of the top seat of the second bearing flange 7, and is tightened by the fixing nut 9, thereby completing the connection between the first bearing flange 2 and the second bearing flange 7.

[0033] like Figure 2 and Figure 3 As shown, in a preferred embodiment of the present invention, the insulating film 3, the copper film electrode 4, and the dielectric layer 5 are all circular thin films, and the diameters of the insulating film 3, the copper film electrode 4, and the dielectric layer 5 are all the same.

[0034] In this embodiment of the invention, preferably, the thicknesses of the insulating film 3, the copper film electrode 4, and the dielectric layer 5 are all at the micrometer level.

[0035] In the sealed pressure sensor based on a triboelectric nanogenerator, gas enters the detection device through the second bearing flange 7, and then into the first bearing flange 2. As the gas pressure increases, it exerts a compressive force on the pressure-sensitive sphere 6. Since the pressure-sensitive sphere 6 is a hollow sphere with a through hole at its bottom, the gas pressure first enters the hollow part of the pressure-sensitive sphere 6. As the pressure increases, the contact area between the upper part of the pressure-sensitive sphere 6 and the dielectric layer 5 also increases. The specific charge transfer is as follows... Figure 4 As shown, simply put, an increasing contact area results in a gradually increasing voltage. This invention conducted sealing pressure tests, applying air pressures of 0 MPa, 1 MPa, 2 MPa, 3 MPa, 4 MPa, and 5 MPa to the sealing pressure sensor based on a triboelectric nanogenerator. The resulting voltages are as follows: Figure 5 As shown, the voltage generally increases with increasing pressure. This demonstrates that the sealing pressure sensor based on a triboelectric nanogenerator has the ability to detect the pressure of a sealing device and to detect leaks in the sealing device.

[0036] The working principle of this invention is: In this sealed pressure sensor based on a triboelectric nanogenerator, gas enters the detection device through the second bearing flange 7 during operation, and then enters the first bearing flange 2. As the gas pressure increases, the gas exerts a compressive force on the pressure-sensitive ball 6. Since the pressure-sensitive ball 6 is a hollow sphere with a through hole at its bottom, the gas pressure first enters the hollow part of the pressure-sensitive ball 6. As the pressure increases, the contact area between the upper part of the pressure-sensitive ball 6 and the dielectric layer 5 also increases, and a gradually increasing voltage is generated as the contact area increases.

[0037] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A sealed pressure sensor based on a triboelectric nanogenerator, comprising a first bearing flange and a second bearing flange, characterized in that, The first bearing flange has a through hole at its center; the second bearing flange has a through hole at its center, and the second bearing flange is hollow overall for connection with the detection element, and also includes: The upper cover plate is fixedly connected to the first bearing flange. The upper cover plate is generally disc-shaped and serves as a carrier for the insulating film. An insulating film is attached to the lower surface of the upper cover plate; A copper film electrode, wherein the copper film electrode is attached to the lower surface of an insulating film; A dielectric layer is attached to the lower surface of a copper film electrode; The pressure-sensitive ball is in the shape of a three-dimensional ellipse and is fixedly installed inside the first bearing flange. The inside of the pressure-sensitive ball is hollow, and the bottom of the pressure-sensitive ball has a through hole to form a cavity. The transverse diameter of the pressure-sensitive ball is equal to the inner diameter of the first bearing flange.

2. The sealed pressure sensor based on a triboelectric nanogenerator according to claim 1, characterized in that, The pressure-sensitive ball is a hollow silicone ball.

3. The sealed pressure sensor based on a triboelectric nanogenerator according to claim 1, characterized in that, The first bearing flange is flange-shaped in general. A boss is provided on the upper part of the first bearing flange. Eight through holes are evenly distributed on the outer side of the base of the first bearing flange.

4. The sealed pressure sensor based on a triboelectric nanogenerator according to claim 3, characterized in that, The second bearing flange is flange-shaped in general. A boss is provided at the bottom of the second bearing flange, and eight through holes are evenly distributed on the outer side of the top seat of the second bearing flange.

5. The sealed pressure sensor based on a triboelectric nanogenerator according to claim 4, characterized in that, It also includes fixing bolts and fixing nuts, and the first and second bearing flanges are connected by fixing bolts and fixing nuts.

6. The sealed pressure sensor based on a triboelectric nanogenerator according to claim 1, characterized in that, The insulating film, copper electrode, and dielectric layer are all circular thin films, and the diameters of the insulating film, copper electrode, and dielectric layer are all the same.

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