Real-time monitoring device, system and method for motion state of triboelectric rotating component

Abstract

The invention discloses a real-time monitoring device, system and method for the motion state of a triboelectric rotating component. The device comprises a rolling bearing, wherein the rolling bearing comprises a bearing ring, a retainer and a rolling body; the sensor comprises a dielectric ring and a stator circuit board, and the dielectric ring and the stator circuit board are arranged on the same side of the rolling bearing; the dielectric ring is arranged on the retainer and rotates at the same speed as the retainer; the stator circuit board is provided with a pair of electrodes, and the dielectric ring can generate electrostatic induction with the pair of electrodes so as to generate an electric signal used for monitoring the operation state of the retainer. According to the invention, the sensor and the rolling bearing can be integrated in a narrow space and the operation state of the retainer can be monitored.

Description

Technical Field

[0001] The present application relates to the field of sensor technology, and in particular to a real-time monitoring device, system and method for the motion state of a triboelectric rotating component. Background Art

[0002] Rotating parts, especially bearings, are widely used in various fields of modern industry, such as high-speed motors, new energy vehicles and precision CNC machine tools. For rolling bearings, slippage between the rolling elements and the raceways may cause raceway smearing and cage breakage, reduce cage stability, and lead to rolling bearing performance degradation and deterioration. Existing bearing cage condition monitoring technologies include fiber optic displacement sensors, eddy current sensors, photoelectric measurement systems and high-speed camera technologies. These technologies are expensive and require additional space outside the rolling bearing. Therefore, it is difficult for existing technologies to integrate sensors with bearing cages in a small space, making real-time monitoring difficult. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a real-time monitoring device, system and method for the motion state of a triboelectric rotating component, so as to solve the problem of high difficulty in integrating the monitoring equipment with the rolling bearing when monitoring the retainer state of the bearing in the prior art.

[0004] In order to achieve the above-mentioned objectives, the first aspect of the present application provides a real-time monitoring device for the motion state of a triboelectric rotating component, including a rolling bearing, the rolling bearing including a retaining frame, and the real-time monitoring device also includes: a sensor, the sensor including a dielectric ring and a stator circuit board, the dielectric ring and the stator circuit board are arranged on the same side of the rolling bearing; the dielectric ring is arranged on the retaining frame and rotates at the same speed as the retaining frame; a pair of electrodes are provided on the stator circuit board, and the dielectric ring can generate electrostatic induction with the pair of electrodes to generate an electrical signal for monitoring the operating state of the retaining frame.

[0005] In an embodiment of the present application, the dielectric ring includes an annular base and multiple first electrode layers of dielectric material, and the multiple first electrode layers are all formed on the side of the base away from the retaining frame; each first electrode layer is fan-shaped, and the multiple first electrode layers are distributed at intervals on the circumference around the base.

[0006] In the embodiment of the present application, each first electrode layer includes a plurality of first electrode units arranged at intervals along the radial direction of the substrate, each first electrode unit is in a fan-shaped ring, and the plurality of first electrode units on each first electrode layer are arranged concentrically.

[0007] In an embodiment of the present application, the stator circuit board is ring-shaped, and a pair of electrodes are arranged on the side of the stator circuit board facing the retaining frame; the pair of electrodes are divided into a first electrode and a second electrode, the first electrode and the second electrode are both fan-shaped, and the first electrode and the second electrode are arranged adjacent to each other on a circumference around the stator circuit board; the central angles of the first electrode and the second electrode are the same as the central angles of each first electrode layer.

[0008] In an embodiment of the present application, the first electrode and the second electrode both include a plurality of second electrode units of dielectric material and a plurality of third electrode units of dielectric material, the second electrode unit and the third electrode unit of the first electrode are both fan-ring shaped and arranged alternately along the radial direction of the stator circuit board; the second electrode unit and the third electrode unit of the second electrode are both fan-ring shaped and arranged alternately along the radial direction of the stator circuit board; the second electrode unit of the first electrode is adjacent to the third electrode unit of the second electrode in the circumferential direction of the stator circuit board, and the third electrode unit of the first electrode is adjacent to the second electrode unit of the second electrode in the circumferential direction of the stator circuit board.

[0009] In an embodiment of the present application, the sensor further includes a first fixing member and a second fixing member for fixing the stator circuit board, the stator circuit board is connected to the first fixing member, and the second fixing member is connected between the first fixing member and the stator ring of the rolling bearing.

[0010] In the embodiment of the present application, the first fixing member and the second fixing member are both annular structures. The first fixing member has an outer end face facing the retaining frame, and a receiving groove for embedding the stator circuit board is formed in the middle of the outer end face; the second fixing member is magnetically adsorbed between the outer end face and the stator ring.

[0011] In an embodiment of the present application, the depth of the accommodating groove is consistent with the thickness of the stator circuit board; and / or the rolling bearing, the dielectric ring, the stator circuit board, the first fixing member and the second fixing member are coaxially arranged.

[0012] According to a second aspect of the present application, there is provided a real-time monitoring system for the motion state of a friction electric rotating component, the real-time monitoring system comprising: the above-mentioned real-time monitoring device for the motion state of a friction electric rotating component; a signal acquisition device, connected to the sensor signal of the above-mentioned real-time monitoring device for the motion state of a friction electric rotating component, for acquiring the electrical signal generated by it; a signal processing device, connected to the signal of the signal acquisition device, for acquiring the electrical signal acquired by it and determining the main frequency and amplitude of the electrical signal, determining the slip rate of the retaining frame according to the main frequency; and determining the displacement change of the center of mass of the retaining frame according to the change in the amplitude.

[0013] The third aspect of the present application provides a real-time monitoring method for the motion state of a friction electric rotating component, and the real-time monitoring method includes: obtaining the electrical signal generated by a sensor in the above-mentioned real-time monitoring device for the motion state of a friction electric rotating component; performing a fast Fourier transform on the electrical signal to obtain a spectrum of the electrical signal; determining the main frequency and amplitude of the electrical signal based on the spectrum; determining the rotational speed of the retaining frame based on the main frequency, and determining the slip rate of the retaining frame based on the rotational speed; determining the displacement change of the center of mass of the retaining frame based on the change in amplitude.

[0014] Through the above technical solution, the sensor includes a dielectric ring and a stator circuit board, and the dielectric ring and the stator circuit board are arranged on the same side of the rolling bearing; the dielectric ring is arranged on the retaining frame of the rolling bearing and rotates at the same speed as the retaining frame; a pair of electrodes are provided on the stator circuit board, and the dielectric ring can generate electrostatic induction with the pair of electrodes, thereby generating an electrical signal for monitoring the operating status of the retaining frame, so that the rolling bearing and the sensor can be integrated in a small space.

[0015] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0017] Figure 1 Schematic diagram of an explosion of a real-time monitoring device for the motion state of a triboelectric rotating component according to an embodiment of the present application Figure 1 ;

[0018] Figure 2 Schematic diagram of an explosion of a real-time monitoring device for the motion state of a triboelectric rotating component according to an embodiment of the present application Figure 2 ;

[0019] Figure 3 Schematically shows a plane of a stator circuit board according to an embodiment of the present application Figure 1 ;

[0020] Figure 4 Schematically shows a plane of a stator circuit board according to an embodiment of the present application Figure 2 ;

[0021] Figure 5 Schematically shows a plan view of a dielectric ring according to an embodiment of the present application;

[0022] Figure 6 A side sectional view schematically shows a real-time monitoring device for the motion state of a triboelectric rotating component according to an embodiment of the present application;

[0023] Figure 7 A side cross-sectional view of a stator circuit board, a first fixing member, and a second fixing member according to an embodiment of the present application is schematically shown;

[0024] Figure 8 A three-dimensional diagram of a rolling bearing according to an embodiment of the present application is schematically shown;

[0025] Fig. 9 A three-dimensional diagram schematically shows a first fixing member and a stator circuit board according to an embodiment of the present application;

[0026] Fig.10 The structure diagram of a real-time monitoring system for the motion state of a triboelectric rotating component according to an embodiment of the present application is schematically shown.

[0027] Description of Reference Numerals

[0028] 100 Bearing ring 110 Bearing outer ring

[0029] 111 Bearing outer ring end face 120 Bearing inner ring

[0030] 200 Cage Rotor Assembly 210 Cage

[0031] 211 Cage end face 220 Dielectric ring

[0032] 221 first electrode unit 230 rolling element

[0033] 300 stator assembly 310 stator circuit board

[0034] 312 stator circuit board back side 313 second electrode unit

[0035] 314 third electrode unit 315 first pad

[0036] 316 second solder pad 320 second fixing member

[0037] 321 front side of the second fixing member 322 back side of the second fixing member

[0038] 330 first fixing member 331 front side of first fixing member

[0039] 332 first fixing member reverse side 333 receiving groove

[0040] 1010 sensor 1020 signal acquisition device

[0041] 1030 Signal Processing Device DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0043] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0045] In the embodiment of the present application, the sensor may be a triboelectric sensor, and the rotating component may be a rolling bearing, a roller bearing, a ball bearing, or a rotating mechanical component such as a gear, a roller, a shaft, or a clutch.

[0046] Figure 1 Schematic diagram of an explosion of a real-time monitoring device for the motion state of a triboelectric rotating component according to an embodiment of the present application Figure 1 . Figure 2 Schematic diagram of an explosion of a real-time monitoring device for the motion state of a triboelectric rotating component according to an embodiment of the present application Figure 2 .like Figure 1 and Figure 2As shown, an embodiment of the present application provides a real-time monitoring device for the motion state of a triboelectric rotating component, and the real-time monitoring device may include: a rolling bearing, and the rolling bearing may include a bearing ring 100, a retaining frame 210, and a rolling body 230. The real-time monitoring device may also include: a sensor, and the sensor may include a dielectric ring 220 and a stator assembly 300. The stator assembly 300 may include a stator circuit board 310, a first fixing member 330, and a second fixing member 320. The dielectric ring 220 and the stator circuit board 310 are arranged on the same side of the rolling bearing, and the dielectric ring 220 is arranged on the retaining frame 210 and rotates at the same speed as the retaining frame 210. Figure 3 Schematically shows a plane of a stator circuit board according to an embodiment of the present application Figure 1 . Figure 4 Schematically shows a plane of a stator circuit board according to an embodiment of the present application Figure 2 .like Figure 3 and Figure 4 As shown, an embodiment of the present application provides a stator circuit board 310 , on which a pair of electrodes are disposed. The dielectric ring 220 can generate electrostatic induction with the pair of electrodes to generate an electrical signal for monitoring the operating status of the retaining frame 210 .

[0047] In the embodiment of the present application, the rolling bearing can be understood as an existing standard rolling bearing component, and the rolling bearing can include a bearing outer ring 110, a bearing inner ring 120, a cage 210 and a rolling element 230. Figure 1 The bearing shown is a cylindrical roller bearing, but the above scheme is also applicable to other types of roller bearings and ball bearings.

[0048] Figure 5 Schematically shows a plan view of a dielectric ring according to an embodiment of the present application. Figure 5 As shown, in an embodiment of the present application, the dielectric ring 220 may include an annular base and multiple first electrode layers of dielectric material, and the multiple first electrode layers are all formed on the side of the base away from the retaining frame; each first electrode layer is fan-shaped, and the multiple first electrode layers are spaced apart on the circumference around the base.

[0049] In the embodiment of the present application, each first electrode layer may include a plurality of first electrode units 221 arranged at intervals along the radial direction of the substrate, each first electrode unit 221 is fan-shaped, and the plurality of first electrode units 221 on each first electrode layer are concentrically arranged.

[0050] In the embodiment of the present application, the stator circuit board 310 is ring-shaped, and a pair of electrodes are arranged on the side of the stator circuit board 310 facing the retaining frame 210. The pair of electrodes are divided into a first electrode and a second electrode. The first electrode and the second electrode are both fan-shaped, and the first electrode and the second electrode are adjacently arranged on a circumference around the stator circuit board 310. The central angles of the first electrode and the second electrode are the same as the central angles of each first electrode layer.

[0051] In the embodiment of the present application, the design of the consistency of the central angle ensures that when the dielectric ring 220 rotates with the holder 210, the electrostatic induction between the stator circuit board 310 and the dielectric ring 220 can generate a stable and predictable electrical signal. This is very important for the accuracy and consistency of the signal, and reduces the problem of signal distortion caused by structural asymmetry or angle mismatch.

[0052] In the embodiment of the present application, the first electrode and the second electrode both include a plurality of second electrode units of dielectric material and a plurality of third electrode units of dielectric material. The second electrode unit and the third electrode unit of the first electrode are both fan-shaped and alternately arranged along the radial direction of the stator circuit board; the second electrode unit 313 and the third electrode unit 314 of the second electrode are both fan-shaped and alternately arranged along the radial direction of the stator circuit board 310; the second electrode unit 313 of the first electrode and the third electrode unit 314 of the second electrode are adjacent to each other in the circumferential direction of the stator circuit board 310, and the third electrode unit 314 of the first electrode and the second electrode unit 313 of the second electrode are adjacent to each other in the circumferential direction of the stator circuit board 310.

[0053] In the embodiment of the present application, the second electrode unit 313 and the third electrode unit 314 can be respectively connected to the first pad 315 and the second pad 316 arranged on the stator circuit board back surface 312 of the stator circuit board 310, and are used to conduct the electrical signal generated by the electrostatic induction between the above electrode units and the dielectric ring 220 to the signal acquisition device through the above pads. By providing a plurality of second electrode units 313 of dielectric material and a plurality of third electrode units 314 of dielectric material in the first electrode and the second electrode, the radial displacement of the retainer 210 can be monitored, thereby realizing the monitoring of the operating state of the bearing retainer.

[0054] In one embodiment, the material of the annular base can be a polymer material with a triboelectric effect, such as nylon, Kapton (polyimide) film, and PTFE (polytetrafluoroethylene) film. The materials of the first electrode unit 221, the second electrode unit 313, and the third electrode unit 314 can be copper electrodes or aluminum electrodes. The materials of the bearing outer ring 110, the bearing inner ring 120, and the rolling element 230 can be bearing steel, and the material of the retainer 210 can be copper. The above figure shows a cage-type retainer, and other types of retainers are also applicable to the above solution.

[0055] In one embodiment, the dielectric ring 220 and the stator assembly 300 together constitute the above-mentioned sensor, which can be a triboelectric cage condition monitoring sensor. In the initial state of the sensor, the dielectric ring 220 is aligned with the first electrode. Due to the difference in the electronegativity of the materials, the dielectric ring 220 accumulates negative charges on the surface. According to the law of conservation of charge, an equal amount of positive charges accumulate on the surface of the electrode grid. At this time, the positive and negative charges cancel each other out and are in an electrostatic equilibrium state. When the dielectric ring 220 rotates under the drive of the cage 210, the dielectric ring 220 begins to rotate relative to the first electrode and gradually contacts the second electrode. This generates a potential difference between the two electrodes, causing the positive charge to flow from the first electrode to the second electrode in the direction of rotation. When the dielectric ring 220 completely overlaps the second electrode, all the positive charges are transferred to the second electrode and return to an electrostatic equilibrium state. As the dielectric ring 220 continues to rotate, the positive charges on the second electrode flow in the opposite direction again, toward the first electrode, forming a reverse current in the external circuit. As the bearing continues to rotate, the above process is repeated periodically. The multi-frequency wave electric signal is collected by the signal acquisition device and the electric signal is simultaneously subjected to fast Fourier transformation to extract the main frequency of the signal, wherein the frequency value represents the rotation speed of the cage 210, and the real-time monitoring of the slip rate of the bearing cage can be realized through calculation of the relevant formula. When the center of mass of the cage 210 of the rolling bearing undergoes radial displacement, the contact area of ​​each group of electrodes will decrease, thereby causing the amplitude of the electric signal output by the sensor to change. The change in the contact area can be calculated through the relevant formula, and then the change in the center of mass of the cage 210 can be determined, thereby realizing the monitoring of the operating status of the cage 210.

[0056] In the embodiment of the present application, the sensor also includes a first fixing member 330 and a second fixing member 320 for fixing the stator circuit board 310, the stator circuit board 310 is connected to the first fixing member 330, and the second fixing member 320 is connected between the first fixing member 330 and the stator ring of the rolling bearing (i.e., the bearing ring 100).

[0057] In the embodiment of the present application, the first fixing member 330 and the second fixing member 320 are both annular structures. The first fixing member 330 has an outer end face facing the retaining frame 210, and a receiving groove for embedding the stator circuit board is formed in the middle of the outer end face, and the depth of the receiving groove is consistent with the thickness of the stator circuit board; the second fixing member is magnetically adsorbed between the outer end face and the stator ring.

[0058] Figure 6 A side sectional view schematically shows a real-time monitoring device for the motion state of a triboelectric rotating component according to an embodiment of the present application. Figure 7 A side cross-sectional view of a stator circuit board, a first fixing member, and a second fixing member according to an embodiment of the present application is schematically shown. Figure 8A three-dimensional diagram of a rolling bearing according to an embodiment of the present application is schematically shown. Fig. 9 The figure schematically shows a three-dimensional view of a first fixing member and a stator circuit board according to an embodiment of the present application. Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the retainer 210 is arranged in the bearing ring 100, and the retainer 210 is used to constrain the movement of the rolling element 230. A dielectric ring 220 is provided on the retainer end face 211 of the retainer 210, and the dielectric ring 220 can be glued to the retainer end face 211. The second fixing member 320 is connected between the first fixing member 330 and the bearing outer ring 110 of the rolling bearing. The second fixing member 320 can be a magnetic ring, and the front face 331 of the first fixing member and the back face 322 of the second fixing member are adsorbed together by magnetic adsorption, and the front face 321 of the second fixing member and the end face 111 of the bearing outer ring are also adsorbed together by magnetic adsorption, so as to integrate the stator assembly 300 on the bearing ring 100, and combine the dielectric ring 220, so as to realize the integration of the sensor and the rolling bearing, and the dielectric ring 220 that can rotate at the same speed as the retainer 210 can generate electrostatic induction through the stator circuit board 310, and generate an electrical signal for monitoring the running state of the retainer 210. The first fixing member 330 has an outer end surface (i.e., the first fixing member front surface 331) facing the holder 210, and a receiving groove for the stator circuit board 310 to be embedded is formed in the middle of the outer end surface, and the depth of the receiving groove is consistent with the thickness of the stator circuit board 310. The stator circuit board 310 can be completely placed in the receiving groove, and the stator circuit board back surface 312 of the stator circuit board 310 can be connected to the first fixing member front surface 331 to stabilize the stator circuit board 310.

[0059] In one embodiment, the dielectric ring 220 is adhered to the end face 211 of the retainer. The retainer 210 can be used to evenly distribute the rolling elements 230 around the entire circumference of the bearing raceway while ensuring that the rolling elements 230 do not contact each other. When the bearing is normally installed, the rolling elements 230 are located in the through slots of the retainer 210, so the rotation speed of the retainer 210 is also the revolution speed of the rolling elements 230. The stator assembly 300 is adsorbed on the end face 111 of the outer ring of the bearing by the magnetic force of the second fixing member 320. Specifically, the back face 312 of the stator circuit board is glued to the receiving groove 333, the front face 321 of the second fixing member is adsorbed on the end face 111 of the outer ring of the bearing, and the back face 322 of the second fixing member is glued to the front face 331 of the first fixing member. Finally, a first soldering pad 315 and a second soldering pad 316 are provided on one side of the back face 312 of the stator circuit board, and a wire is respectively welded to each of them for exporting electrical signals.

[0060] In one embodiment, the stator assembly 300 can be fixed by properly designing the bearing seat and using a bearing retaining ring or other structure instead of the second fixing member 320 .

[0061] In the embodiment of the present application, the depth of the accommodating groove is consistent with the thickness of the stator circuit board; and / or the rolling bearing, the dielectric ring 220, the stator circuit board 310, the first fixing member 330 and the second fixing member 320 are coaxially arranged.

[0062] In the embodiment of the present application, all key components are arranged along the same axis to ensure the precise spatial alignment of the above components. Integrating the above sensor with the rolling bearing in a small space and adopting this alignment method reduces the risk of misalignment or offset between components, maintains the overall stability and running accuracy of the original rolling bearing, and thus improves the overall stability and service life of the bearing.

[0063] Through the above technical solution, first, clean the grease on the end face 111 of the bearing outer ring and the end face 211 of the cage; then, attach the dielectric ring 220 to the cleaned end face 211 of the cage respectively; secondly, bond the stator circuit board 310 to the first fixing member 330 to ensure that the reverse side 312 of the stator circuit board is accurately fitted with the receiving groove; finally, use the magnetic force of the second fixing member 320 to fix the first fixing member front side 331 of the first fixing member 330 with the bearing outer ring end face 111 of the bearing outer ring 110 together, and try to ensure that the axis of the first fixing member 330 coincides with the axis of the bearing outer ring 110. In this way, when the rolling bearing is working, the shaft system drives the bearing inner ring 120 to rotate together, and at the same time, the rolling body 230 generates rolling friction with the raceway of the bearing inner ring 120 and the bearing outer ring 110, and the rolling body 230 rotates while driving the cage 210 to revolve relative to the bearing inner ring 120. During this period, for each rotation of the holder 210, the dielectric ring 220 will generate multiple electrostatic inductions with the stator circuit board 310, and each electrostatic induction will generate a waveform of one cycle. In the initial state, the dielectric ring 220 is aligned with the first electrode. Due to the difference in the electronegativity of the materials, the dielectric ring 220 accumulates negative charges on the surface. According to the law of conservation of charge, an equal amount of positive charges are accumulated on the surface of the first electrode. At this time, the positive and negative charges cancel each other out and are in an electrostatic equilibrium state. When the dielectric ring 220 rotates under the drive of the holder 210, the dielectric ring 220 begins to rotate relative to the first electrode and gradually contacts the second electrode. This generates a potential difference between the two electrodes, causing positive charges to flow from the first electrode to the second electrode in the direction of rotation. When the dielectric ring 220 completely overlaps with the second electrode, all positive charges are transferred to the second electrode and return to an electrostatic equilibrium state. As the dielectric ring 220 continues to rotate, the positive charges on the second electrode flow in the opposite direction again, toward the first electrode, forming a reverse current in the external circuit. As the rolling bearing continues to rotate, the above process is repeated periodically. When the center of mass of the retaining frame 210 undergoes radial displacement, the contact area of ​​each group of electrodes will decrease, causing the amplitude of the electrical signal output by the sensor to change. The change in contact area can be calculated through relevant formulas, and then the change in the displacement of the center of mass of the retaining frame 210 can be determined, thereby realizing the monitoring of the operating status of the retaining frame 210.

[0064] Fig.10 The structure diagram of a real-time monitoring system for the motion state of a triboelectric rotating component according to an embodiment of the present application is schematically shown. Fig.10As shown, in an embodiment of the present application, a real-time monitoring system for the motion state of a triboelectric rotating component is also provided, and the real-time monitoring system may include: the real-time monitoring device for the motion state of the triboelectric rotating component mentioned above; a signal acquisition device 1020, connected to the sensor 1010 of the above device, for collecting the electrical signal generated by it; a signal processing device 1030, connected to the signal acquisition device 1020, for obtaining the electrical signal collected by it and determining the main frequency and amplitude of the electrical signal, determining the slip rate of the cage according to the main frequency; and determining the displacement change of the center of mass of the cage according to the change in amplitude. The real-time monitoring system for monitoring the operating state of the bearing cage improves the integration of the triboelectric cage sensor, effectively ensures the accurate perception of the working state of the bearing, and has technical advantages such as easy integration, high durability and good stability. The proposal of this application provides a new idea for the state monitoring of the bearing cage, has great application value in the field of bearing monitoring, and further promotes the development of bearing in-situ monitoring technology.

[0065] In the embodiment of the present application, the signal acquisition device 1020 is connected to the sensor 1010 signal, and the signal can be derived through a wire respectively welded on the first soldering pad 315 and the second soldering pad 316 on the stator circuit board 310 in the above scheme. Optionally, the electrical signal can also be derived in a wireless form such as infrared.

[0066] An embodiment of the present application also provides a real-time monitoring method for the motion state of a friction electric rotating component, which may include: obtaining an electrical signal generated by a sensor in the above-mentioned real-time monitoring device for the motion state of a friction electric rotating component; performing a fast Fourier transform on the electrical signal to obtain a spectrum of the electrical signal; determining a main frequency and amplitude of the electrical signal based on the spectrum; determining the rotational speed of the retaining frame based on the main frequency, and determining the slip rate of the retaining frame based on the rotational speed; and determining a displacement change of the center of mass of the retaining frame based on a change in the amplitude.

[0067] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0068] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 Rolling bearing with the function specified in one or more boxes.

[0069] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce a product including an instruction rolling bearing, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0070] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0071] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0072] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A real-time monitoring device for the motion state of a triboelectric rotating component, comprising a rolling bearing, wherein the rolling bearing comprises a retaining frame, characterized in that: The device also includes: The sensor comprises a dielectric ring and a stator circuit board, wherein the dielectric ring and the stator circuit board are arranged on the same side of the rolling bearing; the dielectric ring is arranged on the retaining frame and rotates at the same speed as the retaining frame; a pair of electrodes is arranged on the stator circuit board, and the dielectric ring can generate electrostatic induction with the pair of electrodes to generate an electrical signal for monitoring the operating status of the retaining frame.

2. The real-time monitoring device according to claim 1, characterized in that: The dielectric ring includes an annular base and multiple first electrode layers of dielectric material, and the multiple first electrode layers are all formed on the side of the base away from the retaining frame; each first electrode layer is fan-shaped, and the multiple first electrode layers are spaced apart on the circumference around the base.

3. The real-time monitoring device according to claim 2, characterized in that: Each of the first electrode layers includes a plurality of first electrode units arranged at intervals along the radial direction of the substrate, each of the first electrode units is in a fan ring shape, and the plurality of first electrode units on each of the first electrode layers are arranged concentrically.

4. The real-time monitoring device according to claim 2, characterized in that: The stator circuit board is ring-shaped, and the pair of electrodes are arranged on the side of the stator circuit board facing the retaining frame; the pair of electrodes are divided into a first electrode and a second electrode, the first electrode and the second electrode are both fan-shaped, and the first electrode and the second electrode are adjacently arranged on a circumference around the stator circuit board; the central angles of the first electrode and the second electrode are the same as the central angle of each first electrode layer.

5. The real-time monitoring device according to claim 4, characterized in that: The first electrode and the second electrode both include a plurality of second electrode units of dielectric material and a plurality of third electrode units of dielectric material; the second electrode unit and the third electrode unit of the first electrode are both fan-shaped and alternately arranged along the radial direction of the stator circuit board; the second electrode unit and the third electrode unit of the second electrode are both fan-shaped and alternately arranged along the radial direction of the stator circuit board; the second electrode unit of the first electrode and the third electrode unit of the second electrode are adjacent to each other in the circumferential direction of the stator circuit board, and the third electrode unit of the first electrode and the second electrode unit of the second electrode are adjacent to each other in the circumferential direction of the stator circuit board.

6. The real-time monitoring device according to any one of claims 1 to 5, characterized in that: The sensor further comprises a first fixing member and a second fixing member for fixing the stator circuit board, the stator circuit board is connected to the first fixing member, and the second fixing member is connected between the first fixing member and the stator ring of the rolling bearing.

7. The real-time monitoring device according to claim 6, characterized in that: The first fixing member and the second fixing member are both annular structures, the first fixing member has an outer end surface facing the retaining frame, and a receiving groove for the stator circuit board to be embedded is formed in the middle of the outer end surface; The second fixing member is magnetically adsorbed between the outer end surface and the stator ring.

8. The real-time monitoring device according to claim 7, characterized in that: The depth of the accommodating groove is consistent with the thickness of the stator circuit board; And / or, the rolling bearing, the dielectric ring, the stator circuit board, the first fixing member and the second fixing member are coaxially arranged.

9. A real-time monitoring system for the motion state of a triboelectric rotating component, characterized in that: include: A real-time monitoring device for the motion state of a triboelectric rotating component according to any one of claims 1 to 8; A signal acquisition device, connected to the sensor signal of the device, for acquiring the electrical signal generated by the sensor; as well as A signal processing device is connected to the signal acquisition device, and is used to obtain the electrical signal collected by the signal acquisition device and determine the main frequency and amplitude of the electrical signal, determine the slip rate of the retaining frame according to the main frequency; and determine the displacement change of the center of mass of the retaining frame according to the change of the amplitude.

10. A real-time monitoring method for the motion state of a triboelectric rotating component, characterized in that: The real-time monitoring method comprises: Acquire the electrical signal generated by the sensor in the real-time monitoring device for the motion state of a triboelectric rotating component according to any one of claims 1 to 8; Performing a fast Fourier transform on the electrical signal to obtain a frequency spectrum of the electrical signal; Determining the main frequency and amplitude of the electrical signal according to the frequency spectrum; determining a rotation speed of the cage according to the main frequency, and determining a slip rate of the cage based on the rotation speed; The displacement change of the center of mass of the retaining frame is determined according to the change of the amplitude.

Images