A floating ball type multi-degree-of-freedom vibration sensing device based on friction nanogenerator

Abstract

The present invention discloses a floating ball type multi-degree-of-freedom vibration sensing device based on a friction nanogenerator, comprising a sensing detection mechanism and a fixed protection mechanism, wherein the sensing detection mechanism is embedded in the fixed protection mechanism, wherein: the sensing detection mechanism comprises a copper electrode, a spherical shell, deionized water, a hollow sphere and an iron core, wherein the copper electrode is attached to six positions of the closed spherical shell, namely, the top, bottom, front, back, left, and right, the deionized water is filled in the spherical shell, the iron core is embedded in the hollow sphere; the hollow sphere with the iron core is suspended in the deionized water. The present invention has strong practicality and functionality and can be widely used in the field of nanotechnology.

Description

Technical Field

[0001] The invention relates to the field of nanotechnology, and in particular to a floating ball type multi-degree-of-freedom vibration sensing device based on a friction nanogenerator. Background Art

[0002] Vibration sensor is one of the key components in detection technology and is widely used in many fields such as energy, chemical industry, metallurgy, machine manufacturing, scientific research and teaching. Its main function is to accurately receive the mechanical vibration of the object being measured and convert it into an electrical signal for output or display. Vibration sensors are mainly divided into three categories: mechanical, optical, and electrical measurement. They all include three links: vibration pickup, measurement and amplification circuit, and display and recording. These sensors require additional power to work properly, which increases energy consumption and has a relatively complex structure. The emerging friction nanogenerator (TENG) provides a potential solution for self-powered sensing technology.

[0003] The working principle of the triboelectric nanogenerator (TENG) based on organic materials lies in the coupling of triboelectric effect and electrostatic induction effect. When two different materials come into contact with each other under the action of external force, the surfaces of the two materials will carry electrostatic charges of opposite signs; when the two contact surfaces are separated under the action of external force, the potential difference generated by the separation of the two electrostatic charges will drive electrons to flow between the electrodes attached to the upper and lower surfaces of the two materials, thereby generating an electrical signal output, and the output electrical signal is used to characterize the amplitude of mechanical vibration. Compared with traditional sensors, sensors based on triboelectric nanogenerators have a simple structure and a small size. The required materials are easily available, which reduces the cost of the sensor. Most importantly, no additional power supply is required to provide energy for the operation of the sensor. The sensor can be powered by the coupling of triboelectric effect and electrostatic induction effect. Summary of the invention

[0004] In view of the above problems, the present invention proposes a floating ball type multi-degree-of-freedom vibration sensing device based on a friction nanogenerator.

[0005] The technical solution provided by the present invention is:

[0006] A floating ball type multi-degree-of-freedom vibration sensing device based on a friction nanogenerator comprises a sensing detection mechanism and a fixing protection mechanism, wherein the sensing detection mechanism is embedded in the fixing protection mechanism, wherein:

[0007] The sensing detection mechanism includes a copper electrode, a spherical shell, deionized water, a hollow sphere and an iron core. The copper electrode is attached to six positions of the closed spherical shell, including up, down, front, back, left and right. The deionized water is filled in the spherical shell. The iron core is embedded in the hollow sphere. The hollow sphere with the iron core is suspended in the deionized water.

[0008] Preferably, the fixed protection mechanism comprises a shell and a base, the hollow sphere is embedded in the base, and the base is fixedly connected to the bottom position of the shell.

[0009] Preferably, the base is provided with a groove for embedding the lower part of the hollow sphere, and the cross-sectional shape of the base is a trapezoid.

[0010] Preferably, the copper electrode is connected to an amplifier circuit, and the amplifier circuit includes a resistor, a power supply and a capacitor.

[0011] Preferably, the spherical shell is made of polymethyl methacrylate material, and the hollow sphere is made of polytetrafluoroethylene material.

[0012] The advantages of the present invention compared with the prior art are:

[0013] The present invention combines the friction nanogenerator technology. Due to its simple structure, it is easy to operate, low cost, uncomplicated system, compact equipment, and can detect multi-degree-of-freedom vibration data. When vibration occurs, the distance between the float and the polymethyl methacrylate (PMMA) sphere shell in six directions will change accordingly. Due to the coupling of the friction electrification effect and electrostatic induction, the charge on the copper electrode will also change accordingly. This changing electrical signal is converted into vibration data through processing, thereby realizing the collection of vibration parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a structural diagram of an embodiment of the present invention;

[0015] Figure 2 is a diagram of an electrostatic induction process in an embodiment of the present invention;

[0016] Figure 3 is a signal amplification circuit diagram in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1-3 The present invention is described in further detail.

[0018] A floating ball type multi-degree-of-freedom vibration sensing device based on a friction nanogenerator comprises a sensing detection mechanism and a fixing protection mechanism, wherein the sensing detection mechanism is embedded in the fixing protection mechanism, wherein:

[0019] The sensing detection mechanism includes a copper electrode 1, a spherical shell 2, deionized water 3, a hollow sphere 4 and an iron core 5. The copper electrode 1 is attached to six positions of the closed spherical shell 2, including up, down, front, back, left and right. The deionized water 3 is filled in the spherical shell 2, and the iron core 5 is embedded in the hollow sphere 4; the hollow sphere 4 with the iron core 5 is suspended in the deionized water 3.

[0020] Combined with Figure 3 , where Vcc is the power supply, R1, R2, R3 and R4 are resistors, and C1, C2 and C3 are capacitors.

[0021] The fixed protection mechanism includes a shell 6 and a base 7 . The hollow sphere 4 is embedded in the base 7 , and the base 7 is fixedly connected to the bottom position of the shell 6 .

[0022] The base 7 is provided with a groove 8 in which the lower part of the hollow sphere 4 is embedded, and the cross-sectional shape of the base 7 is a trapezoid.

[0023] The copper electrode 1 is connected to an amplifier circuit, which includes a resistor, a power supply and a capacitor.

[0024] The spherical shell 2 is made of polymethyl methacrylate material, and the hollow sphere 4 is made of polytetrafluoroethylene material.

[0025] The mechanical energy of vibration changes the distance between the float in the sensor device and the polymethyl methacrylate (PMMA) spherical shell in six directions. Due to the coupling of the friction electrification effect and the electrostatic induction effect between the materials, the polytetrafluoroethylene (PTFE) hollow sphere 4 outside the float is negatively charged. Therefore, the charge on the copper electrodes in the six areas of the polymethyl methacrylate (PMMA) spherical shell 2 on the outside of the sensor device, namely, up, down, front, back, left, and right, will change. It is necessary to collect and process this electrical signal to obtain multi-degree-of-freedom vibration data.

[0026] The voltage divider bias amplifier circuit can amplify the weak signal output by the sensor, and can detect the vibration parameters more accurately. The voltage divider bias amplifier circuit has a stable static operating point, and the output signal will not be distorted.

[0027] The float-type multi-degree-of-freedom vibration sensor device based on the friction nanogenerator is not only easy to operate, reduces costs, has a simple system, and is compact, but can also detect multi-degree-of-freedom vibration data.

[0028] The float-type multi-degree-of-freedom vibration sensing device based on the friction nanogenerator provided by the present invention amplifies the collected electrical signals, realizes self-powered sensing, and can ensure the operation of the sensor without inputting additional electricity. The system does not generate any pollution, which complies with the principle of energy conservation and emission reduction.

[0029] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A floating ball type multi-degree-of-freedom vibration sensing device based on a friction nanogenerator, characterized in that: It includes a sensing detection mechanism and a fixed protection mechanism, the sensing detection mechanism is embedded in the fixed protection mechanism, wherein: the sensing detection mechanism includes a copper electrode, a spherical shell, deionized water, a hollow sphere and an iron core, the copper electrode is attached to six positions of the closed spherical shell, such as up, down, front, back, left and right, the deionized water is filled in the spherical shell, and the iron core is embedded in the hollow sphere; the hollow sphere with the iron core is suspended in the deionized water; the fixed protection mechanism includes a shell and a base, the hollow sphere is embedded in the base, and the base is fixed to the bottom position in the shell; the base is provided with a groove for embedding the lower part of the hollow sphere, and the cross-sectional shape of the base is a trapezoid; the copper electrode is connected with an amplifying circuit, The amplifying circuit includes a resistor, a power supply and a capacitor; the spherical shell is made of polymethyl methacrylate material, and the hollow sphere is made of polytetrafluoroethylene material; the mechanical energy of vibration causes the distance between the float in the sensor device and the polymethyl methacrylate (PMMA) spherical shell in six directions to change. Due to the coupling of the friction electrification effect and the electrostatic induction effect between the materials, the polytetrafluoroethylene (PTFE) hollow sphere outside the float is negatively charged. Therefore, the charge on the copper electrodes in the six areas of the polymethyl methacrylate (PMMA) spherical shell outside the sensor device, namely, up, down, front, back, left and right, will change. It is necessary to collect and process this electrical signal to obtain multi-degree-of-freedom vibration data.

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