Intelligent bearing with self-powered wireless sensing function

Abstract

The invention discloses an intelligent bearing with a self-powered wireless sensing function. The intelligent bearing comprises a sensing monitoring circuit, a nano-generator, an energy management circuit, a wireless transmission assembly and an upper computer. Wherein the energy management circuit is connected with the nano generator and is used for receiving an input power supply and performing boost conversion to obtain an output voltage. In the power supply mode, the piezoelectric-friction composite nanometer generator is adopted to generate power, and the power is supplied to the embedded intelligent bearing wireless monitoring system in a boosting conversion mode of the energy management circuit. Meanwhile, mechanical energy wasted in the working process of the bearing is supplied to the monitoring system of the intelligent bearing, the purposes that the monitoring system is self-powered and the working efficiency of the bearing is improved are achieved, and the application occasion of the bearing monitoring system is expanded.

Description

Technical Field

[0001] The present application belongs to the technical field of intelligent bearings, and specifically relates to an intelligent bearing with a self-powered wireless sensing function. Background Art

[0002] Rolling bearings are an important part of rotating machinery. During the operation of rolling bearings, their status needs to be monitored to ensure the normal operation of rotating machinery. Usually, the working status signal of the bearing is obtained by installing a vibration sensor on the bearing seat or bearing housing. However, the relevant signals collected in this way not only include the working status information of the bearing itself, but also contain noise signals generated by the movement of other mechanisms, which is very unfavorable for the monitoring of early bearing failures. In order to solve the above problems, starting from the root of signal acquisition, the concept of intelligent bearings is introduced. Intelligent bearings are bearing units composed of improved bearing bodies, related accessories, micro sensors, processing and transmission circuits, etc., which have self-sensing, self-diagnosis, and self-regulation functions, so as to effectively monitor the operating status of the bearing.

[0003] For example, the patent with application number 202320156606.9 discloses an intelligent bearing monitoring system and an intelligent bearing. The patent adopts a double-ring external intelligent bearing structure. The dual sensing module can accurately reflect the operating status of the bearing. However, the patent requires an external power supply, and the bearing needs to be stopped to replenish power, which reduces working efficiency. Summary of the invention

[0004] The present application provides an intelligent bearing with a self-powered wireless sensing function to solve the technical problem that the existing battery or wired power supply methods limit the application occasions of the bearing monitoring system.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: an intelligent bearing with a self-powered wireless sensing function, comprising: a sensor monitoring circuit, which is arranged in the outer ring of the bearing body, wherein the sensor monitoring circuit is used to monitor the state information of the bearing body;

[0006] A nanogenerator is installed in the radial slot of the bearing body, wherein the nanogenerator is used to absorb the mechanical energy of the bearing body and convert it into an input voltage;

[0007] An energy management circuit is connected to the nanogenerator, wherein the energy management circuit is used to receive input power and perform boost conversion to obtain output voltage;

[0008] A wireless transmission component is communicatively connected with the sensor monitoring circuit, wherein the wireless transmission component is used to convert the status information into a wireless signal for transmission;

[0009] The host computer is wirelessly connected to the wireless transmission component, wherein the host computer is used to receive status information and display the status information on the screen in real time.

[0010] Furthermore, the nanogenerator includes: a piezoelectric unit fixed between two mass blocks, wherein the piezoelectric unit is an elastic substrate with AI electrodes adhered on both sides, and one end of the elastic substrate is a cantilever beam.

[0011] A triboelectric unit is arranged in parallel with the elastic substrate, wherein the triboelectric unit is fixed to a side of the upper and lower mass blocks opposite to the piezoelectric unit;

[0012] The insulating bottom plate box is arranged in the radial slot of the bearing body, wherein the insulating bottom plate box is used to store the piezoelectric unit and the friction electric unit.

[0013] Furthermore, the insulating base plate box includes a first base plate and a second base plate which are arranged parallel to the friction electric unit; one side of the first base plate and the second base plate is connected through a third base plate which is perpendicular to the first base plate, and the other side of the first base plate and the second base plate is connected to the fifth base plate through a fourth base plate, wherein the fourth base plate and the fifth base plate are both arranged parallel to the third base plate, and the end of the cantilever beam is located between the fourth base plate and the fifth base plate.

[0014] Furthermore, the first bottom plate and the second bottom plate are respectively connected to the triboelectric unit and are provided with a triboelectric electrode, and a side of the triboelectric unit connected to the mass block is provided with a triboelectric electrode.

[0015] Furthermore, the energy management circuit includes a first circuit, a second circuit and a third circuit with the same structure, the first circuit and the second circuit are respectively connected to the friction electric units on the upper and lower sides, and the third circuit is connected to the piezoelectric unit; wherein the output ends of the first circuit, the second circuit and the third circuit are connected in series with the first adjustment resistor and grounded to provide power supply to the system.

[0016] Further, the first circuit comprises:

[0017] A rectifier bridge, used for rectifying the input voltage of the triboelectric unit to obtain a first rectified signal, wherein the input end of the rectifier bridge is connected to the triboelectric unit;

[0018] A filter circuit, used for filtering and storing the first rectified signal, wherein the first filter circuit comprises a first tantalum capacitor and a first inductor, pin 2 of the rectifier bridge is connected to the midpoint of the first tantalum capacitor and the first inductor, and pin 4 of the rectifier bridge is connected to the first tantalum capacitor;

[0019] A boost converter, used for performing a boost process on the filtered first rectified signal to obtain a first boosted signal, wherein a ground terminal of the boost converter is connected to pin 4 of the rectifier bridge, an input terminal of the boost converter is connected to a first inductor, and a first diode is connected between the input terminal and the output terminal of the boost converter;

[0020] The output circuit is used to store energy for the first boost signal to obtain a first output voltage signal; wherein the output circuit includes a second tantalum capacitor, an output capacitor and a second diode, the output end of the boost converter is connected to the midpoint of the second tantalum capacitor and the second diode, and the second tantalum capacitor is connected in parallel with the output capacitor.

[0021] Furthermore, the sensing monitoring circuit includes: an acceleration sensor for monitoring the vibration signal of the bearing body; a temperature sensor for monitoring the temperature signal of the bearing body; and a main control chip connected to the acceleration sensor and the temperature sensor for data transmission.

[0022] Furthermore, the wireless transmission component is connected to the main control chip to send vibration signals and temperature signals to the host computer.

[0023] The beneficial effects of the present application are as follows: the present application adopts a piezoelectric-friction composite nanogenerator to generate electricity and uses an energy management circuit to step up and convert the electricity to power the embedded intelligent bearing wireless monitoring system. At the same time, the mechanical energy wasted during the operation of the bearing is used to power the monitoring system of the intelligent bearing, achieving the purpose of self-powering the monitoring system, improving the working efficiency of the bearing, and expanding the application occasions of the bearing monitoring system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural block diagram of an embodiment of an embedded intelligent bearing wireless monitoring system of the present application;

[0025] Figure 2 yes Figure 1 A structural schematic diagram of an embodiment of a bearing body in FIG.

[0026] Figure 3 yes Figure 1 A schematic structural diagram of an embodiment of a nanogenerator;

[0027] Figure 4 yes Figure 1 A schematic diagram of the structure of an energy management circuit according to an embodiment of the present invention;

[0028] Figure 5 yes Figure 4 A schematic diagram of the circuit structure of an embodiment of the first circuit of FIG. 1 ;

[0029] Figure 6 yes Figure 4 A schematic diagram of the circuit structure of the second and first embodiments of the circuit;

[0030] Figure 7 yes Figure 4 A schematic diagram of the circuit structure of the third circuit embodiment;

[0031] Figure 8 yes Figure 1 A circuit diagram of an embodiment of an energy management circuit in FIG.

[0032] Fig. 9 for Figure 8 The output voltage of the energy management circuit in the diagram changes with time;

[0033] Fig.10 yes Figure 1 A schematic diagram of the structure of an embodiment of a sensor monitoring circuit;

[0034] Fig.11 yes Figure 1 A circuit diagram of an embodiment of a sensing monitoring circuit and a wireless transmission component in FIG. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with specific embodiments.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the present application is not limited to the specific embodiments of the following disclosure.

[0037] See also Figure 1 , Figure 1 It is a structural block diagram of an embodiment of an embedded intelligent bearing wireless monitoring system of the present application. The system includes: a bearing body 1, a sensor monitoring circuit 2, a nano generator 3, an energy management circuit 4, a wireless transmission component 5 and a host computer 6. The sensor monitoring circuit 2 is arranged in the outer ring of the bearing body 1, wherein the sensor monitoring circuit 2 is used to monitor the status information of the bearing body 1. The nano generator 3 is installed in the radial slot 11 of the bearing body 1, wherein the nano generator 3 is used to absorb the mechanical energy of the bearing body 1 and convert it into input voltage. The energy management circuit 4 is connected to the nano generator 3, wherein the energy management circuit 4 is used to receive the input power supply and perform a step-up conversion to obtain the output voltage. The wireless transmission component 5 is connected to the sensor monitoring circuit 2 in communication, wherein the wireless transmission component 5 is used to convert the status information into a wireless signal for transmission. The host computer 6 is connected to the wireless transmission component 5 in wireless communication, wherein the host computer 6 is used to receive the status information and display the status information in real time on the screen.

[0038] The bearing body 1, sensor monitoring circuit 2, nanogenerator 3, energy management circuit 4, wireless transmission component 5 and host computer 6 in the above design constitute an intelligent bearing system, wherein each sensor is installed on the outer ring of the bearing to receive various status signals of the bearing body 1. The present application adopts the method of radial slotting 11 of the bearing to fix the other components of the intelligent bearing wireless monitoring system except the host computer 6 in the slotting 11, so that the mechanical energy wasted during the operation of the bearing can be absorbed by the nanogenerator 3, and then converted into electrical energy to power the entire system.

[0039] See also Figure 2 , Figure 2 yes Figure 1 The structural diagram of an embodiment of the bearing body in FIG. The bearing body 1 mainly includes an outer ring 14, an inner ring 13, a rolling element 12 installed between the inner ring 13 and the outer ring 14, and a radially opened groove 11 for installing the lower computer part of the bearing monitoring system. The lower computer part of the bearing monitoring system is installed in the groove 11.

[0040] See also Figure 3 , Figure 3 yes Figure 1 Schematic diagram of the structure of an embodiment of a nanogenerator in the embodiment. The nanogenerator 3 includes: a piezoelectric unit 31, a friction electric unit 32 and an insulating bottom plate box 33. Among them, the nanogenerator 3 in this embodiment is a piezoelectric-friction composite nanogenerator, that is, a combination of a piezoelectric cantilever beam and a contact-separation friction nanogenerator, which includes a piezoelectric unit 31 and two friction electric units 32. The piezoelectric unit 31 is fixed between two mass blocks 34, wherein the piezoelectric unit 31 is an elastic substrate with Al electrodes adhered on both sides, and one end of the elastic substrate is a cantilever beam. The friction electric unit 32 is arranged in parallel with the elastic substrate, wherein the friction electric unit 32 is fixed to a side of the upper and lower mass blocks 34 opposite to the piezoelectric unit 31. The insulating bottom plate box 33 is arranged in the slot 11 of the bearing body 1, wherein the insulating bottom plate box 33 is used to store the piezoelectric unit 31 and the friction electric unit 32.

[0041] The insulating bottom plate box 33 includes a first bottom plate 331 and a second bottom plate 332 which are arranged parallel to the triboelectric unit 32. One side of the first bottom plate 331 and the second bottom plate 332 are connected through a third bottom plate 333 which is perpendicular to the first bottom plate 331, and the other side of the first bottom plate 331 and the second bottom plate 332 are connected to a fifth bottom plate 335 through a fourth bottom plate 334. The fourth bottom plate 334 and the fifth bottom plate 335 are both arranged parallel to the third bottom plate 333, and the initial position of the end of the cantilever beam is located between the fourth bottom plate 334 and the fifth bottom plate 335.

[0042] The first bottom plate 331 and the second bottom plate 332 are respectively connected to the triboelectric unit 32 and are provided with a triboelectric electrode, and a triboelectric electrode is provided on a side of the triboelectric unit 32 connected to the mass block 34. The back-and-forth vibration of the cantilever beam and the back-and-forth friction of the electrode surface of the triboelectric unit 32 can generate electrical energy, which is then transmitted to the energy management circuit 4 for step-up conversion.

[0043] In this embodiment, the piezoelectric unit 31 uses a polyvinylidene difluoride (PVDF) piezoelectric film, the upper and lower surfaces of which are pasted with Al electrodes and fixed to the bottom of an Al elastic substrate, and the end of the elastic substrate is fixed with a lead mass block 34, and the beginning of the cantilever beam of the elastic substrate is fixed to a bottom plate on one side of the insulating bottom plate box 33. The upper and lower triboelectric units 32 are pasted with Al friction electrodes on the surface of the side where the mass block 34 is connected, and two polydimethylsiloxane (PDMS) friction films with back Al electrodes are respectively fixed on the first bottom plate 331 and the second bottom plate 332 on the side in contact with the triboelectric unit 32. When the bearing is working, the entire power supply unit generates elastic vibration, the cantilever beam of the piezoelectric unit 31 bends to generate voltage, and the triboelectric unit 32 contacts and separates to generate voltage to power the system.

[0044] See also Figure 4 , Figure 4 yes Figure 1 The energy management circuit 4 includes a first circuit 41, a second circuit 42 and a third circuit 43 of the same structure, the second circuit 42 and the third circuit 43 are respectively connected to the triboelectric units 32 on the upper and lower sides, and the first circuit 41 is connected to the piezoelectric unit 31; wherein the output ends of the first circuit 41, the second circuit 42 and the third circuit 43 are connected in series with the first regulating resistor 44 and grounded, so as to provide power supply to the system.

[0045] See also Figure 5-7 , Figure 5 yes Figure 4 A schematic diagram of the circuit structure of an embodiment of the first circuit of FIG. 1 ; Figure 6 yes Figure 4 A schematic diagram of the circuit structure of the second circuit 1 embodiment; Figure 7 yes Figure 4Schematic diagram of the circuit structure of the third circuit of the embodiment of the invention. The first circuit 41, the second circuit 42 and the third circuit 43 respectively include rectifier bridges 411, 421, 431, filter circuits 412, 422, 432, boost converters 413, 423, 433 and output circuits 414, 424, 434. The rectifier bridge 411 is used to rectify the input voltage of the piezoelectric unit 31, and the rectifier bridges 421 and 431 rectify the input voltage of the friction electric unit 32 to obtain a rectified signal, wherein the pins 1 and 3 of the rectifier bridge 411 are connected to the piezoelectric unit 31, and the pins 1 and 3 of the rectifier bridges 421 and 431 are connected to the friction electric unit 32.

[0046] The filtering circuits 412, 422, and 432 are respectively used to filter and store the rectified signals, wherein each filtering circuit 412, 422, and 432 respectively includes a first tantalum capacitor 4121, 4221, and 4321 and a first inductor 4122, 4222, and 4322, and the pin 2 of the rectifier bridge 411, 421, and 431 is respectively connected to the midpoint of the tantalum capacitor 4121, 4221, and 4321 and the first inductor 4122, 4222, and 4322, and the pin 4 of the rectifier bridge 411, 421, and 431 is connected to the tantalum capacitor 4121, 4221, and 4321.

[0047] The boost converters 413, 423, 433 are used to boost the filtered rectified signal to obtain a boosted signal, wherein the ground terminals of the boost converters 413, 423, 433 are respectively connected to pin 4 of the rectifier bridges 411, 421, 431, the input terminals of the boost converters 413, 423, 433 are connected to the first inductors 4122, 4222, 4322, and the first diodes 4131, 4231, 4331 are respectively connected between the input terminals and the output terminals of the boost converters 413, 423, 433.

[0048] The output circuits 414, 424, and 434 are respectively used to store energy for the boost signal to obtain an output voltage signal; wherein, the output circuits 414, 424, and 434 respectively include second tantalum capacitors 4141, 4241, and 4341, output capacitors 4142, 4242, and 4342, and second diodes 4143, 4243, and 4343; the output ends of the boost converters 413, 423, and 433 are connected to the midpoints of the second tantalum capacitors 4141, 4241, and 4341 and the second diodes 4143, 4243, and 4343; and the second tantalum capacitors 4141, 4242, and 4342 are connected in parallel with the output capacitors 4142, 4242, and 4342.

[0049] See also Figure 8 , Figure 8 yes Figure 1Circuit diagram of an embodiment of the energy management circuit in FIG. In this embodiment, the piezoelectric unit 31 and the friction electric unit 32 of the piezoelectric-friction composite nanogenerator 3 provide sinusoidal alternating current for the first circuit 41, the second circuit 42 and the third circuit 43 respectively. The first friction circuit and the second friction circuit are connected to the rectifier bridges D4 and D8 respectively, and the piezoelectric unit 31 is connected to the rectifier bridge D2. The rectifier bridges D2, D4 and D8 convert the sinusoidal alternating current into a semi-sinusoidal alternating current output, and the semi-sinusoidal direct current is stored in the first tantalum capacitors E2, E4 and E6 connected in parallel, and low-pass filtering is performed. The first inductors L1, L2 and L3 absorb and store electrical energy, and then the electrical energy is transmitted to the inside of the boost converter chips U1, U2 and U3 through the inductors.

[0050] The boost converter chip has three interfaces: Lx is a switch drive interface, OUT is an output voltage interface, and GND is grounded. And the boost converter chip enables the filter capacitor to store charge, increase and output a stable DC voltage. The output end of the voltage converter chip U1, U2, and U3 is connected in parallel with the output capacitors C2, C1, and C3 through the second diode D6, D5, and D9, which can prevent leakage, reduce power consumption, and store electric energy in the second tantalum capacitors E1, E3, and E5. The output capacitors C1, C2, and C3 of the three parts are connected in series to power the sensor monitoring system. Among them, the boost converter chip model in this embodiment is TP8330, the model of the first diode 4131 is 1N5819, and the model of the second diode 4143 is 1N4001.

[0051] See also Fig. 9 , Fig. 9 for Figure 8 The output voltage of the energy management circuit in the figure changes with time. The rolling element of the bearing body 1 will produce elastic vibration when it is loaded, and its vibration frequency can be expressed as Where Z is the number of rolling elements in the bearing; f r is the rotation frequency of the bearing main shaft; d is the rolling element diameter; D is the pitch circle diameter; α is the contact angle. When the excitation frequency is constant at 104.28Hz and the sinusoidal acceleration excitation magnitude is 2g, the output voltage of the energy management circuit 4 is always around 3V, which can meet the power supply requirements of the sensor monitoring circuit 2.

[0052] See also Fig.10 , Fig.10 yes Figure 1Schematic diagram of the structure of an embodiment of the sensor monitoring circuit in FIG. The sensor monitoring circuit 2 includes: a main control chip 21, an acceleration sensor 22 and a temperature sensor 23. The acceleration sensor 22 is used to monitor the vibration signal of the bearing body 1. The temperature sensor 23 is used to monitor the temperature signal of the bearing body 1. The main control chip 21 is connected to the acceleration sensor 22 and the temperature sensor 23, and performs data transmission. The wireless transmission component 5 is connected to the main control chip 21, and is used to send vibration signals and temperature signals to the upper computer 6.

[0053] See also Fig.11 , Fig.11 yes Figure 1 Circuit diagram of an embodiment of the sensing monitoring circuit and wireless transmission component in FIG. In this embodiment, the sensing monitoring circuit 2 includes a three-axis acceleration sensor U1, a temperature sensor U2, and two chips U3, one of which is connected to the sensor as a main control chip U3, and the other chip U3 is connected to the host computer 6 to receive the collected signal. The model of the three-axis acceleration sensor U1 is ADXL345, the model of the temperature sensor U2 is DS18B20, and the model of the chip U3 is CC2530. The stable DC voltage output by the energy management circuit 4 is connected to the power supply port VDD to provide power for the sensing monitoring circuit 2. The temperature sensor U2 requires a low voltage and a small package size. It adopts a single-line serial port communication method. The single-line serial port is connected to the serial port P0_3 of the main control chip U3 to collect the temperature signal of the bearing for the system. The three-axis acceleration sensor U1 has the largest measurement range, low required voltage, and small package size. The IIC connection method is adopted, the data line SDA is connected to the serial port P0_5 of the main control chip U3, and the clock line SCL is connected to the serial port P0_7 of the main control chip U3, so as to collect the gravity acceleration of the X, Y, and Z axes of the bearing for the system, and then obtain the vibration signal of the bearing. The two chips U3 use the ZigBee protocol for wireless communication. The main control chip connected to the sensor is used as the terminal, and the signal collected by the sensor is transmitted to another chip U3 connected to the host computer 6 as a coordinator through the wireless module 5. The chip U3 as a coordinator is connected to the host computer 6 using a USB data cable, and the serial communication method is adopted to display the sensor monitoring data temperature, X, Y, Z three-axis acceleration and other data in real time on the monitoring interface of the host computer 6.

[0054] In this embodiment, the ZigBee wireless communication protocol is used for the transmission of the bearing status signal. The CC2530 chip is used to collect the signal from the terminal and transmit it wirelessly to the coordinator connected to the host computer 6. The ZigBee wireless communication technology has the characteristics of short distance, low complexity, low power consumption, low data rate and low cost. The transmission rate of the bearing monitoring system does not need to be too high. Compared with other wireless communication technologies, ZigBee's low power consumption and low cost are more suitable for intelligent bearing monitoring.

[0055] In the power supply mode, the present application adopts a piezoelectric-friction composite nanogenerator to generate electricity and uses an energy management circuit 4 to step up and convert the electricity to power the embedded intelligent bearing wireless monitoring system. The mechanical energy wasted during the operation of the bearing is used to power the monitoring system of the intelligent bearing, achieving the purpose of self-powering the monitoring system and improving the working efficiency of the bearing.

[0056] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A smart bearing with self-powered wireless sensing function, characterized in that: include: A sensor monitoring circuit is arranged in the outer ring of the bearing body, wherein the sensor monitoring circuit is used to monitor the status information of the bearing body; A nanogenerator is installed in the radial slot of the bearing body, wherein the nanogenerator is used to absorb the mechanical energy of the bearing body and convert it into input voltage; An energy management circuit is connected to the nanogenerator, wherein the energy management circuit is used to receive the input power supply and perform a voltage step-up conversion to obtain an output voltage; A wireless transmission component is communicatively connected to the sensor monitoring circuit, wherein the wireless transmission component is used to convert the status information into a wireless signal for transmission; The host computer is wirelessly connected to the wireless transmission component, wherein the host computer is used to receive the status information and display the status information on a screen in real time.

2. The system according to claim 1, characterized in that The nanogenerator comprises: A piezoelectric unit is fixed between the two mass blocks, wherein the piezoelectric unit is an elastic substrate with AI electrodes adhered on both sides, and one end of the elastic substrate is a cantilever beam; A triboelectric unit is arranged in parallel with the elastic substrate, wherein the triboelectric unit is fixed to a surface of the upper and lower mass blocks opposite to the piezoelectric unit; An insulating bottom plate box is arranged in the radial groove of the bearing body, wherein the insulating bottom plate box is used to store the piezoelectric unit and the friction electric unit.

3. The system according to claim 2, characterized in that The insulating base plate box includes a first base plate and a second base plate which are arranged parallel to the friction electric unit; one side of the first base plate and the second base plate is connected through a third base plate which is perpendicular to the first base plate, and the other side of the first base plate and the second base plate is connected to a fifth base plate through a fourth base plate, wherein the fourth base plate and the fifth base plate are both arranged parallel to the third base plate, and the end of the cantilever beam is located between the fourth base plate and the fifth base plate.

4. The system according to claim 3, characterized in that The first bottom plate and the second bottom plate are respectively connected to the triboelectric unit and are provided with triboelectric electrodes. The triboelectric unit is provided with the triboelectric electrode on one side connected to the mass block.

5. The system according to claim 1, characterized in that The energy management circuit includes a first circuit, a second circuit and a third circuit with the same structure, the first circuit and the second circuit are respectively connected to the friction electric units on the upper and lower sides, and the third circuit is connected to the piezoelectric unit; wherein the output ends of the first circuit, the second circuit and the third circuit are connected in series with a first adjustment resistor and grounded, so as to provide power supply to the system.

6. The system according to claim 4, characterized in that The first circuit comprises: A rectifier bridge, used for rectifying the input voltage of the triboelectric unit to obtain a first rectified signal, wherein the input end of the rectifier bridge is connected to the triboelectric unit; A filter circuit, used for filtering and storing the first rectified signal, wherein the first filter circuit comprises a first tantalum capacitor and a first inductor, pin 2 of the rectifier bridge is connected to the midpoint of the first tantalum capacitor and the first inductor, and pin 4 of the rectifier bridge is connected to the first tantalum capacitor; A boost converter, used for performing a boost process on the filtered first rectified signal to obtain a first boosted signal, wherein a ground terminal of the boost converter is connected to pin 4 of the rectifier bridge, an input terminal of the boost converter is connected to the first inductor, and a first diode is connected between the input terminal and the output terminal of the boost converter; An output circuit is used to store energy for the first boost signal to obtain a first output voltage signal; wherein the output circuit includes a second tantalum capacitor, an output capacitor and a second diode, the output end of the boost converter is connected to the midpoint of the second tantalum capacitor and the second diode, and the second tantalum capacitor is connected in parallel with the output capacitor.

7. The system according to claim 1, characterized in that The sensor monitoring circuit comprises: An acceleration sensor, used for monitoring the vibration signal of the bearing body; A temperature sensor, used to monitor the temperature signal of the bearing body; The main control chip is connected to the acceleration sensor and the temperature sensor to perform data transmission.

8. The system according to claim 6, characterized in that The wireless transmission component is connected to the main control chip and is used to send the vibration signal and the temperature signal to the host computer.

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