Vibration and state monitoring system and monitoring method based on friction nanometer generator

Abstract

The invention relates to a vibration and state monitoring system and monitoring method based on a friction nanometer generator. The vibration and state monitoring system comprises a shell, a vibrator assembly, a power generation unit, an energy storage unit, a vibration and state monitoring unit and a signal processing and transmitting unit, the power generation unit comprises two pairs of power generation friction layers and two power generation electrode layers, the two power generation electrode layers are located between the two pairs of power generation friction layers respectively, one pair of power generation friction layers are arranged on the left side of the vibrator assembly, and the other pair of power generation friction layers are arranged on the lower side of the vibrator assembly; the vibration and state monitoring unit comprises two pairs of vibration and state monitoring friction layers and two vibration and state monitoring electrode layers, and the two vibration and state monitoring electrode layers are located between the two pairs of vibration and state monitoring friction layers respectively. The friction nanometer generator designed by the invention combines the functions of energy collection and vibration and state monitoring, stably supplies power to the capacitor and the wireless transmission module, and realizes the monitoring of a mechanical interface state which is difficult to detect by a traditional sensor.

Description

Technical Field

[0001] The present invention belongs to the technical field of vibration and condition monitoring, and particularly relates to a vibration and condition monitoring system and method based on a triboelectric nanogenerator. Background Art

[0002] With the development of Internet of Things technology, low-power consumption, micro and miniaturized sensors and devices have shown extensive application potential in many engineering fields such as advanced manufacturing, transportation, and aerospace. The power supply problem of these devices has always been a research hotspot. The traditional battery power supply method is difficult to meet the requirements during long-term operation, especially for remote or inaccessible devices. Most traditional wind power generation and hydro power generation devices use rotating turbine devices for energy harvesting, which have characteristics such as large device volume and low energy harvesting density, and are not suitable for devices such as micro and miniaturized sensors. As an emerging solution, energy harvesting technology can capture mechanical, thermal, optical, or electromagnetic energy in the environment and convert it into usable electrical energy for device use.

[0003] Vibration itself can reflect the health condition of mechanical devices, and the mechanical vibration condition and the wear condition of the friction interface can be autonomously monitored through voltage signals. In vehicles such as cars, trains, and airplanes, the noise problem of the braking system affects the overall vehicle comfort, and accelerates the degradation of brake pads and brake discs, increasing the operating cost and affecting safety. If an abnormality occurs in the brake pads during braking, the vibration will intensify and the vibration signal will be irregular. Brake pads are composed of multiple friction particles, and the state of the friction particles is unknown during operation, so the vibration and noise sources are uncertain. Therefore, the operating state of the device and the health state of each friction particle can be judged and predicted by collecting and analyzing the vibration signals of the particles in the brake pads, and safety warnings and replacement prompts can be given. However, brake pads need to be replaced frequently and the working environment is complex. Arranging sensors and power supply devices is a complicated and costly process, and it also affects safety.

[0004] Vibration energy, as one of the research hotspots of energy harvesting technology, is a basic physical phenomenon in nature. Converting vibration energy into electrical energy can meet the power consumption requirements of devices such as sensors. Among them, triboelectric nanogenerators based on vibration energy harvesting are currently a research hotspot. Triboelectric nanogenerators can output large voltage and small current under low-frequency conditions, and the overall power generation efficiency is high, which can meet the power supply requirements for its own sensing; at the same time, the waveform, frequency, and amplitude of the electrical signals generated by triboelectric nanogenerators are directly related to vibration characteristics (such as amplitude, frequency), and can be used to detect vibration states; moreover, the geometric shape of triboelectric nanogenerators can be freely designed and can make full use of the gaps in existing brake pad particles to combine with them, which is convenient for installation and replacement. Summary of the Invention

[0005] To achieve the above object, the present invention provides a vibration and state intelligent monitoring system and monitoring method based on a triboelectric nanogenerator.

[0006] The technical solution of a vibration and state monitoring system based on a triboelectric nanogenerator of the present invention is as follows: A vibration and state monitoring system based on a triboelectric nanogenerator includes a housing, an oscillator assembly, a power generation unit, an energy storage unit, a vibration and state monitoring unit, and a signal processing and transmission unit; The oscillator assembly is located at the central position inside the housing; The power generation unit includes two pairs of power generation friction layers and two power generation electrode layers. The two power generation electrode layers are respectively located between the two pairs of power generation friction layers. One pair of power generation friction layers is arranged on the left side of the oscillator assembly, and the other pair of power generation friction layers is arranged on the upper side of the oscillator assembly; The vibration and state monitoring unit includes two pairs of vibration and state monitoring friction layers and two vibration and state monitoring electrode layers. The two vibration and state monitoring electrode layers are respectively located between the two pairs of vibration and state monitoring friction layers. One pair of vibration and state monitoring friction layers is arranged on the right side of the oscillator assembly, and the other pair of vibration and state monitoring friction layers is arranged on the lower side of the oscillator assembly; The signal processing and transmission unit includes a signal processing module and a wireless transmission module. The signal processing module is used to process the electrical signal to obtain the vibration frequency of the oscillator assembly, and the wireless transmission module sends the information processed by the signal processing module to an external receiving device; The energy storage unit is respectively connected to the power generation unit, the vibration and state monitoring unit, and the signal processing and transmission unit, and is used to store the electric energy generated by the power generation unit and supply power to the vibration and state monitoring unit and the signal processing and transmission unit.

[0007] Further, the vibration and state monitoring system includes two left-right elastic members and an up-down elastic member. One left-right elastic member is located between the oscillator assembly and the left power generation friction layer, and the other left-right elastic member is located between the oscillator assembly and the right vibration and state monitoring friction layer; One up-down elastic member is located between the oscillator assembly and the upper power generation friction layer, and the other up-down elastic member is located between the oscillator assembly and the lower vibration and state monitoring friction layer.

[0008] Furthermore, the two pairs of the power generation friction layers are respectively a pair of wavy power generation friction layers and a pair of planar power generation friction layers, the two power generation electrode layers are respectively a wavy power generation electrode layer and a planar power generation electrode layer, the wavy power generation electrode layer is located between the pair of wavy power generation friction layers, the planar power generation electrode layer is located between the pair of planar power generation friction layers, the pair of power generation friction layers on the left side of the oscillator assembly are both wavy power generation friction layers, and the pair of power generation friction layers on the upper side of the oscillator assembly are planar power generation friction layers.

[0009] Furthermore, the two pairs of the vibration and condition monitoring friction layers are respectively a pair of wavy vibration and condition monitoring friction layers and a pair of planar vibration and condition monitoring friction layers, the two vibration and condition monitoring electrode layers are respectively a wavy vibration and condition monitoring electrode layer and a planar vibration and condition monitoring electrode layer, the wavy vibration and condition monitoring electrode layer is located between the pair of wavy vibration and condition monitoring friction layers, the planar vibration and condition monitoring electrode layer is located between the pair of planar vibration and condition monitoring friction layers, the pair of vibration and condition monitoring friction layers on the right side of the oscillator assembly are both wavy vibration and condition monitoring friction layers, and the pair of vibration and condition monitoring friction layers on the lower side of the oscillator assembly are planar vibration and condition monitoring friction layers.

[0010] Furthermore, the oscillator assembly includes a casing and an oscillator encapsulated in the casing. The materials of the power generation friction layer and the vibration and condition monitoring friction layer are PDMS or PET, and the materials of the power generation electrode layer and the vibration and condition monitoring electrode layer are copper foil or aluminum foil.

[0011] Furthermore, the housing includes a rectangular frame with openings at both upper and lower ends, a bottom plate detachably connected to the lower end of the frame, and a top plate detachably connected to the upper end of the frame.

[0012] The technical solution of a vibration and condition monitoring method based on a triboelectric nanogenerator of the present invention is as follows: A vibration and condition monitoring method based on a nanogenerative friction generator includes the following steps: Install a housing with a power generation unit and a vibration and condition monitoring unit inside on the device to be monitored; When the device to be monitored vibrates left and right, it will drive the oscillator in the casing to slide left and right. The power generation electrode layer on the left side of the oscillator assembly contacts and separates from the power generation friction layer, the vibration and condition monitoring electrode layer on the right side of the oscillator assembly contacts and separates from the vibration and condition monitoring friction layer, the power generation electrode layer on the upper side of the oscillator assembly slides and rubs against the power generation friction layer, and the vibration and condition monitoring electrode layer on the lower side of the oscillator assembly slides and rubs against the vibration and condition monitoring friction layer; the power generation electrode layer is connected to the energy storage unit through a wire and outputs electrical energy to the energy storage unit, and the vibration and condition monitoring electrode layer converts the mechanical energy generated when the oscillator assembly reciprocates in the left and right directions into corresponding electrical signals. When the device to be monitored vibrates up and down, it will drive the oscillator in the casing to slide up and down. The power generation electrode layer on the upper side of the oscillator assembly contacts and separates from the power generation friction layer, and the vibration and status monitoring electrode layer on the lower side of the oscillator assembly contacts and separates from the vibration and status monitoring friction layer. The power generation electrode layer on the left side of the oscillator assembly slides frictionally with the power generation friction layer, and the vibration and status monitoring electrode layer on the right side of the oscillator assembly slides frictionally with the vibration and status monitoring friction layer. The power generation electrode layer is connected to the energy storage unit through a wire to output electrical energy into the energy storage unit. The vibration and status monitoring electrode layer converts the mechanical energy generated when the oscillator assembly reciprocates in the up and down direction into corresponding electrical signals. The signal processing module based on machine learning is used to process the electrical signals to obtain the vibration frequency of the oscillator assembly. The wireless transmission module sends the information processed by the signal processing module to the external receiving device.

[0013] The present invention provides a vibration and status monitoring system and monitoring method based on a triboelectric nanogenerator. Compared with the prior art, its beneficial effects are as follows: The vibration and status monitoring system based on the triboelectric nanogenerator of the present invention can realize energy harvesting in a vibrating environment through the power generation unit. The vibration and status monitoring unit monitors the vibration state of the component by the electrical signals generated by the friction layer during the vibration process. The vibration and status monitoring system based on the triboelectric nanogenerator of the present invention can achieve the purpose of supplying power to the vibration and status monitoring module with the electrical energy generated by the power generation unit. Compared with the traditional technology, the vibration and status monitoring system based on the triboelectric nanogenerator of the present invention combines vibration energy harvesting and vibration state monitoring together, can realize the health state detection of multiple particles respectively, and provides a stable energy source for monitoring signal transmission, which is a new type of self-powered and self-sensing device. In addition, the vibration and status monitoring system based on the triboelectric nanogenerator of the present invention has low manufacturing cost, simple structure, high adaptability, and is easy to be widely applied. Description of the Drawings

[0014] Figure 1 is a partial structural schematic diagram of the vibration and status monitoring system based on the triboelectric nanogenerator of the present invention; Figure 2 is a longitudinal sectional schematic diagram of a partial structure of the vibration and status monitoring system based on the triboelectric nanogenerator of the present invention; Figure 3 is a cross-sectional schematic diagram of a partial structure of the vibration and status monitoring system based on the triboelectric nanogenerator of the present invention; In the figure: 1. Frame; 2. Top plate; 3. Bottom plate; 4. Casing; 5. Oscillator; 6. Left - right elastic member; 7. Up - down elastic member; 8. Wavy power - generating friction layer; 9. Wavy power - generating electrode layer; 10. Planar power - generating friction layer; 11. Planar power - generating electrode layer; 12. Wavy vibration and condition - monitoring friction layer; 13. Wavy vibration and condition - monitoring electrode layer; 14. Planar vibration and condition - monitoring friction layer; 15. Planar vibration and condition - monitoring electrode layer. Detailed implementation mode

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and the specific implementation mode: A specific embodiment of the vibration and condition - monitoring system based on a triboelectric nanogenerator of the present invention is as Figures 1 to 3 shown, and it includes a housing, an oscillator assembly, a power - generating unit, an energy - storage unit, a vibration and condition - monitoring unit, and a signal - processing and transmission unit.

[0016] The housing is composed of a rectangular frame 1 with openings at both upper and lower ends. The material of the frame 1 is aluminum alloy, a detachable bottom plate 3, and a top plate 2, which is convenient for the installation and maintenance of internal components. Preferably, the bottom plate 3 and the top plate 2 are fixed to the frame 1 by screws.

[0017] The oscillator assembly is located at the central position of the housing. The oscillator assembly includes a casing 4 and an oscillator 5 encapsulated inside the casing 4. The casing 4 is made of aluminum alloy, and the oscillator 5 is made of stainless steel. The oscillator 5 is connected to the housing through elastic members and can move in the left - right and up - down directions during vibration.

[0018] The power - generating unit includes two pairs of power - generating friction layers and two power - generating electrode layers. The two pairs of power - generating friction layers are a pair of wavy power - generating friction layers 8 and a pair of planar power - generating friction layers 10 respectively. The two power - generating electrode layers are a wavy power - generating electrode layer 9 and a planar power - generating electrode layer 11 respectively. The wavy power - generating electrode layer 9 is located between a pair of wavy power - generating friction layers 8, and the planar power - generating electrode layer 11 is located between a pair of planar power - generating friction layers 10. A pair of wavy power - generating friction layers 8 and the wavy power - generating electrode layer 9 located between the pair of wavy power - generating friction layers 8 are located inside the housing and between the left side of the oscillator assembly and the inner wall of the housing. A pair of planar power - generating friction layers 10 and the planar power - generating electrode layer 11 located between the pair of planar power - generating friction layers 10 are located inside the housing and between the upper side of the oscillator assembly and the inner wall of the housing.

[0019] The vibration and condition monitoring unit includes two pairs of vibration and condition monitoring friction layers and two vibration and condition monitoring electrode layers. The two pairs of vibration and condition monitoring friction layers are respectively a pair of wavy vibration and condition monitoring friction layers 12 and a pair of planar vibration and condition monitoring friction layers 14. The two vibration and condition monitoring electrode layers are respectively a wavy vibration and condition monitoring electrode layer 13 and a planar vibration and condition monitoring electrode layer 15. The wavy vibration and condition monitoring electrode layer 13 is located between the pair of wavy vibration and condition monitoring friction layers 12, and the planar vibration and condition monitoring electrode layer 15 is located between the pair of planar vibration and condition monitoring friction layers 14. A pair of wavy vibration and condition monitoring friction layers 12 and the wavy vibration and condition monitoring electrode layer 13 located between the pair of wavy vibration and condition monitoring friction layers 12 are located inside the housing and between the right side of the oscillator assembly and the inner wall of the housing. A pair of planar vibration and condition monitoring friction layers 14 and the planar vibration and condition monitoring electrode layer 15 located between the pair of planar vibration and condition monitoring friction layers 14 are located inside the housing and between the lower side of the oscillator assembly and the inner wall of the housing.

[0020] The vibration and condition monitoring system includes two left - right elastic members 6 and an up - down elastic member 7. The two ends of one of the left - right elastic members 6 are respectively fixedly connected to the left side surface of the oscillator assembly and the wavy power - generating friction layer 8 near the left side surface of the oscillator assembly. The two ends of the other left - right elastic member 6 are respectively fixedly connected to the right side surface of the oscillator assembly and the wavy - line vibration and condition monitoring friction layer near the right side surface of the oscillator assembly. The two ends of one of the up - down elastic members 7 are respectively fixedly connected to the upper side surface of the oscillator assembly and the planar power - generating friction layer 10 near the upper side surface of the oscillator assembly. The two ends of the other up - down elastic member 7 are respectively fixedly connected to the lower side surface of the oscillator assembly and the planar vibration and condition monitoring friction layer 14 near the lower side surface of the oscillator assembly.

[0021] The energy storage unit uses a supercapacitor, which is connected to the electrode layer of the power - generating unit, stores the electrical energy generated by triboelectric power generation, and supplies power to the vibration and condition monitoring unit and the signal processing and transmission unit.

[0022] The signal processing and transmission unit includes a signal processing module and a wireless transmission module. The signal processing module is based on an STM32 microcontroller, collects the electrical signals of the vibration and condition monitoring electrode layer, and calculates the vibration frequency through the FFT algorithm. The wireless transmission module uses a LoRa module to send the processed vibration frequency data to an external terminal (such as a PC or a mobile phone).

[0023] When external vibration is transmitted to the housing, the oscillator assembly deviates from the equilibrium position under the action of inertia and squeezes the elastic members in the left-right or up-down directions. When the oscillator assembly vibrates left and right, the oscillator 5 contacts and separates from the left corrugated power generation friction layer 8, and an electric current is generated in the copper foil electrode layer due to the triboelectric effect, and the electric energy is stored in the supercapacitor. The oscillator 5 squeezes the right corrugated vibration and condition monitoring friction layer 12, and the vibration and condition monitoring electrode layer outputs a pulse signal with a frequency consistent with the vibration frequency. When the oscillator assembly vibrates up and down, the oscillator 5 contacts and separates from the upper planar power generation friction layer 10, and an electric current is generated in the aluminum foil electrode layer. The oscillator 5 squeezes the lower planar vibration and condition monitoring friction layer 14, and the vibration and condition monitoring electrode layer outputs a corresponding signal. The signal processing module extracts the amplitude and time interval of the electrical signal and calculates the vibration frequency. The LoRa module wirelessly transmits the data to an external device at a frequency band of 915 MHz, The vibration and condition monitoring system based on a triboelectric nanogenerator of the present invention can achieve energy harvesting in a vibrating environment through a power generation unit, and the vibration and condition monitoring unit monitors the vibration state of the component by the electrical signals generated by the friction layer during vibration. The vibration and condition monitoring system based on a triboelectric nanogenerator of the present invention can achieve the purpose of supplying power to the vibration and condition monitoring module with the electric energy generated by the power generation unit. Compared with the traditional technology, the vibration and condition monitoring system based on a triboelectric nanogenerator of the present invention combines vibration energy harvesting and vibration state monitoring, and can provide a stable energy source for vibration and condition monitoring. In addition, the vibration and condition monitoring system based on a triboelectric nanogenerator of the present invention has a low manufacturing cost, a simple structure, and is easy to be widely applied.

[0024] A specific embodiment of a vibration and condition monitoring method based on a triboelectric nanogenerator of the present invention includes the following steps: Install the housing with a power generation unit and a vibration and condition monitoring unit inside on the device to be monitored; When the device to be monitored vibrates left and right, it will drive the oscillator 5 in the casing 4 to slide left and right. The power generation electrode layer on the left side of the oscillator assembly contacts and separates from the power generation friction layer, and the vibration and condition monitoring electrode layer on the right side of the oscillator assembly contacts and separates from the vibration and condition monitoring friction layer. The power generation electrode layer on the upper side of the oscillator assembly slides and rubs against the power generation friction layer, and the vibration and condition monitoring electrode layer on the lower side of the oscillator assembly slides and rubs against the vibration and condition monitoring friction layer; the power generation electrode layer is connected to the energy storage unit through a wire and outputs electric energy to the energy storage unit, and the vibration and condition monitoring electrode layer converts the mechanical energy generated when the oscillator assembly reciprocates in the left-right direction into corresponding electrical signals; When the device to be monitored vibrates up and down, it will drive the oscillator 5 in the casing 4 to slide up and down. The power generation electrode layer on the upper side of the oscillator assembly contacts and separates from the power generation friction layer, and the vibration and status monitoring electrode layer on the lower side of the oscillator assembly contacts and separates from the vibration and status monitoring friction layer. The power generation electrode layer on the left side of the oscillator assembly slides frictionally with the power generation friction layer, and the vibration and status monitoring electrode layer on the right side of the oscillator assembly slides frictionally with the vibration and status monitoring friction layer. The power generation electrode layer is connected to the energy storage unit through a wire to output electrical energy to the energy storage unit, and the vibration and status monitoring electrode layer converts the mechanical energy generated when the oscillator assembly reciprocates in the up and down direction into corresponding electrical signals. The signal processing module processes the electrical signals to obtain the vibration frequency of the oscillator assembly, and the wireless transmission module sends the information processed by the signal processing module to the external receiving device.

[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vibration and condition monitoring system based on a triboelectric nanogenerator, characterized in that It includes a housing, an oscillator assembly, a power generation unit, an energy storage unit, a vibration and status monitoring unit, and a signal processing and transmission unit; The oscillator assembly is located at the central position inside the housing; The power generation unit includes two pairs of power generation friction layers and two power generation electrode layers. The two power generation electrode layers are respectively located between the two pairs of power generation friction layers. One pair of power generation friction layers is arranged on the left side of the oscillator assembly, and the other pair of power generation friction layers is arranged on the upper side of the oscillator assembly; The vibration and status monitoring unit includes two pairs of vibration and status monitoring friction layers and two vibration and status monitoring electrode layers. The two vibration and status monitoring electrode layers are respectively located between the two pairs of vibration and status monitoring friction layers. One pair of vibration and status monitoring friction layers is arranged on the right side of the oscillator assembly, and the other pair of vibration and status monitoring friction layers is arranged on the lower side of the oscillator assembly; The signal processing and transmission unit includes a signal processing module and a wireless transmission module. The signal processing module is used to process the electrical signal to obtain the vibration frequency of the oscillator assembly, and the wireless transmission module sends the information processed by the signal processing module to an external receiving device; The energy storage unit is respectively connected to the power generation unit, the vibration and status monitoring unit, and the signal processing and transmission unit, and is used to store the electric energy generated by the power generation unit and supply power to the vibration and status monitoring unit and the signal processing and transmission unit.

2. The vibration and condition monitoring system based on a triboelectric nanogenerator according to claim 1, characterized in that, The vibration and status monitoring system includes two left-right elastic members and an up-down elastic member. One left-right elastic member is located between the oscillator assembly and the power generation friction layer on the left side, and the other left-right elastic member is located between the oscillator assembly and the vibration and status monitoring friction layer on the right side; One up-down elastic member is located between the oscillator assembly and the power generation friction layer on the upper side, and the other up-down elastic member is located between the oscillator assembly and the vibration and status monitoring friction layer on the lower side.

3. The vibration and condition monitoring system based on a triboelectric nanogenerator according to claim 1, wherein The two pairs of power generation friction layers are respectively a pair of wavy power generation friction layers and a pair of planar power generation friction layers. The two power generation electrode layers are respectively a wavy power generation electrode layer and a planar power generation electrode layer. The wavy power generation electrode layer is located between the pair of wavy power generation friction layers, and the planar power generation electrode layer is located between the pair of planar power generation friction layers. The pair of power generation friction layers on the left side of the oscillator assembly are both wavy power generation friction layers, and the pair of power generation friction layers on the upper side of the oscillator assembly are planar power generation friction layers.

4. The vibration and status monitoring system based on a triboelectric nanogenerator according to claim 1, wherein The two pairs of vibration and status monitoring friction layers are a pair of wavy vibration and status monitoring friction layers and a pair of planar vibration and status monitoring friction layers. The two vibration and status monitoring electrode layers are respectively a wavy vibration and status monitoring electrode layer and a planar vibration and status monitoring electrode layer. The wavy vibration and status monitoring electrode layer is located between the pair of wavy vibration and status monitoring friction layers, and the planar vibration and status monitoring electrode layer is located between the pair of planar vibration and status monitoring friction layers. The pair of vibration and status monitoring friction layers on the right side of the oscillator assembly are both wavy vibration and status monitoring friction layers, and the pair of vibration and status monitoring friction layers on the lower side of the oscillator assembly are planar vibration and status monitoring friction layers.

5. The vibration and status monitoring system based on a triboelectric nanogenerator according to claim 1, wherein The oscillator assembly includes a housing and an oscillator encapsulated in the housing. The materials of the power generation friction layer and the vibration and condition monitoring friction layer are PDMS or PET, and the materials of the power generation electrode layer and the vibration and condition monitoring electrode layer are copper foil or aluminum foil.

6. The vibration and status monitoring system based on a triboelectric nanogenerator according to claim 1, characterized in that The housing includes a rectangular frame with openings at both upper and lower ends, a bottom plate detachably connected to the lower end of the frame, and a top plate detachably connected to the upper end of the frame.

7. A vibration and condition monitoring method based on a triboelectric nanogenerator, characterized in that, It includes the following steps Install the housing with a power generation unit and a vibration and condition monitoring unit inside on the equipment to be monitored; When the equipment to be monitored vibrates left and right, it will drive the oscillator in the housing to slide left and right. The power generation electrode layer on the left side of the oscillator assembly contacts and separates from the power generation friction layer, and the vibration and condition monitoring electrode layer on the right side of the oscillator assembly contacts and separates from the vibration and condition monitoring friction layer. The power generation electrode layer on the upper side of the oscillator assembly has a sliding friction with the power generation friction layer, and the vibration and condition monitoring electrode layer on the lower side of the oscillator assembly has a sliding friction with the vibration and condition monitoring friction layer. The power generation electrode layer is connected to the energy storage unit through a wire and outputs electrical energy into the energy storage unit. The vibration and condition monitoring electrode layer converts the mechanical energy generated when the oscillator assembly reciprocates in the left and right directions into corresponding electrical signals; When the equipment to be monitored vibrates up and down, it will drive the oscillator in the housing to slide up and down. The power generation electrode layer on the upper side of the oscillator assembly contacts and separates from the power generation friction layer, and the vibration and condition monitoring electrode layer on the lower side of the oscillator assembly contacts and separates from the vibration and condition monitoring friction layer. The power generation electrode layer on the left side of the oscillator assembly has a sliding friction with the power generation friction layer, and the vibration and condition monitoring electrode layer on the right side of the oscillator assembly has a sliding friction with the vibration and condition monitoring friction layer. The power generation electrode layer is connected to the energy storage unit through a wire and outputs electrical energy into the energy storage unit. The vibration and condition monitoring electrode layer converts the mechanical energy generated when the oscillator assembly reciprocates in the up and down directions into corresponding electrical signals; The signal processing module processes the electrical signals to obtain the vibration frequency of the oscillator assembly, and the wireless transmission module sends the information processed by the signal processing module to an external receiving device outside.

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