Rotating equipment condition monitoring system

Abstract

This application provides a rotating equipment condition monitoring system, relating to the field of rotating equipment detection technology. The rotating equipment condition monitoring system includes: a sensor; a power transmission subsystem, comprising a first power transmission circuit and a second power transmission circuit; a data communication subsystem, comprising a first data communication circuit and a second data communication circuit; and a shared magnetic coupling subsystem, wherein the first power transmission circuit couples power supplied by an external power source to the second power transmission circuit via the shared magnetic coupling subsystem to power the sensor, and the first and second data communication circuits are coupled through the shared magnetic coupling subsystem to achieve communication transmission between the external communication device and the sensor. Based on the above, the system can improve the problem of relatively low reliability in existing rotating equipment condition monitoring technologies.

Description

Technical Field

[0001] This application relates to the field of rotating equipment detection technology, and more specifically, to a rotating equipment condition monitoring system. Background Technology

[0002] Currently, condition monitoring of rotating equipment (such as generator rotors, bearings, and rotating shafts) mainly relies on the following two traditional methods: 1. External indirect measurement method: This method indirectly measures the parameters of rotating components by installing sensors outside the equipment. This method is greatly affected by installation location and environmental interference, has low measurement accuracy, and cannot directly obtain key physical quantities inside the rotating body (such as rotor winding temperature, shaft trajectory, internal stress, etc.). 2. Contact brush and slip ring transmission method: This method installs metal slip rings or brushes on the surface of the rotating body, achieving power supply and signal transmission through physical contact. This method has the following significant drawbacks: Easy wear: Long-term friction between the brushes and slip rings leads to material wear, requiring regular replacement and resulting in high maintenance costs; Signal interference: Changes in contact resistance introduce noise, affecting signal stability; Spark risk: High-speed rotation may generate electric sparks, posing a safety hazard in flammable and explosive environments; Installation limitations: Limited by the surface space and structure of the rotating body, it is difficult to achieve simultaneous monitoring of multiple parameters; Short lifespan: Mechanical contact methods cannot meet the requirements of long-term continuous operation, affecting the monitoring of the entire equipment lifecycle.

[0003] Therefore, with the increasing demand for intelligent operation and maintenance and predictive maintenance, there is an urgent need for a more reliable condition monitoring solution for rotating equipment. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a rotating equipment condition monitoring system to improve the problem of relatively low reliability of rotating equipment condition monitoring in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution: A rotating equipment condition monitoring system, comprising: A sensor, wherein the sensor is deployed on a rotating device that requires status monitoring, and the sensor is used to monitor the status of the rotating device; A power transmission subsystem, comprising a first power transmission circuit and a second power transmission circuit, wherein the first power transmission circuit is used to connect to an external power source, the second power transmission circuit is disposed on the rotating device, and the second power transmission circuit is connected to the sensor. A data communication subsystem, comprising a first data communication circuit and a second data communication circuit, wherein the first data communication circuit is used to connect to an external communication device, the second data communication circuit is disposed in the rotating device, and the second data communication circuit is connected to the sensor; A shared magnetic coupling subsystem is provided, wherein the shared magnetic coupling subsystem is connected to the first power transmission circuit, the second power transmission circuit, the first data communication circuit, and the second data communication circuit, respectively. The first power transmission circuit couples the power supplied by the external power source to the second power transmission circuit through the shared magnetic coupling subsystem to power the sensor. The first data communication circuit and the second data communication circuit are coupled through the shared magnetic coupling subsystem to realize the communication transmission of downlink control commands from the external communication device and uplink status data from the sensor.

[0006] In a preferred embodiment of this application, in the aforementioned rotating equipment condition monitoring system, the shared magnetic coupling subsystem includes: A first coupling winding, wherein a first end and a second end of the first coupling winding are respectively connected to a first end and a second end of the first power transmission circuit, and the first end and a second end of the first coupling winding are respectively connected to a first end and a second end of the first data communication circuit. The second coupling winding has a first end and a second end connected to the first end and the second end of the second power transmission circuit, respectively, and the first end and the second end of the second coupling winding are connected to the first end and the second end of the second data communication circuit, respectively. The second coupling winding and the first coupling winding are magnetically coupled, so that the first power transmission circuit and the second power transmission circuit can transmit power through magnetic coupling, and the first data communication circuit and the second data communication circuit can transmit data through magnetic coupling.

[0007] In a preferred embodiment of this application, in the aforementioned rotating equipment condition monitoring system, the first power transmission circuit includes: A power supply inverter sub-circuit, wherein the first DC terminal and the second DC terminal of the power supply inverter sub-circuit are respectively connected to the positive and negative terminals of an external power supply; The first resonant compensation sub-circuit, wherein the first input terminal and the second input terminal of the first resonant compensation sub-circuit are respectively connected to the first AC terminal and the second AC terminal of the power supply inverter sub-circuit. The first notch circuit is provided, wherein the first input terminal and the second input terminal of the first notch circuit are respectively connected to the first output terminal and the second output terminal of the first resonant compensation circuit, and the first output terminal and the second output terminal of the first notch circuit are respectively connected to the first end and the second end of the first coupling winding.

[0008] In a preferred embodiment of this application, in the aforementioned rotating equipment condition monitoring system, the first notch circuit includes an inductor that has high impedance characteristics at high frequencies to isolate the mutual interference between the power transmission loop formed by the first power transmission circuit and the second power transmission circuit and the signal transmission loop formed by the first data communication circuit and the second data communication circuit.

[0009] In a preferred embodiment of this application, in the aforementioned rotating equipment condition monitoring system, the second power transmission circuit includes: The second notch circuit, wherein the first input terminal and the second input terminal of the second notch circuit are respectively connected to the first terminal and the second terminal of the second coupling winding; The second resonant compensation sub-circuit, wherein the first input terminal and the second input terminal of the second resonant compensation sub-circuit are respectively connected to the first output terminal and the second output terminal of the second notch sub-circuit; A power supply rectifier and filter sub-circuit, wherein the first AC terminal and the second AC terminal of the power supply rectifier and filter sub-circuit are respectively connected to the first output terminal and the second output terminal of the second resonant compensation sub-circuit, and the first DC terminal and the second DC terminal of the power supply rectifier and filter sub-circuit are respectively connected to the positive and negative terminals of the sensor.

[0010] In a preferred embodiment of this application, in the aforementioned rotating equipment condition monitoring system, the second notch circuit includes an inductor that has high impedance characteristics at high frequencies to isolate the mutual interference between the power transmission loop formed by the first power transmission circuit and the second power transmission circuit and the signal transmission loop formed by the first data communication circuit and the second data communication circuit.

[0011] In a preferred embodiment of this application, in the aforementioned rotating equipment condition monitoring system, the first data communication circuit includes: A downlink modulation sub-circuit, wherein the first input terminal and the second input terminal of the downlink modulation sub-circuit are respectively connected to the first output terminal and the second output terminal of an external communication device; An uplink demodulation circuit, wherein the first output terminal and the second output terminal of the uplink demodulation circuit are respectively connected to the first input terminal and the second input terminal of the external communication device; The first resonant filter sub-circuit is provided, wherein the first input terminal and the second input terminal of the first resonant filter sub-circuit are respectively connected to the first output terminal and the second output terminal of the downlink modulation sub-circuit, the first output terminal and the second output terminal of the first resonant filter sub-circuit are respectively connected to the first input terminal and the second input terminal of the uplink demodulation sub-circuit, and the first multiplexed terminal and the second multiplexed terminal of the first resonant filter sub-circuit are respectively connected to the first terminal and the second terminal of the first coupling winding.

[0012] In a preferred embodiment of this application, in the aforementioned rotating equipment condition monitoring system, the first resonant filter sub-circuit includes: A first modulation winding assembly, wherein the first input terminal and the second input terminal of the first modulation winding assembly are respectively connected to the first output terminal and the second output terminal of the downlink modulation sub-circuit; The first demodulation winding assembly is provided, wherein the first output terminal and the second output terminal of the first demodulation winding assembly are respectively connected to the first input terminal and the second input terminal of the uplink demodulation sub-circuit, and the first input terminal of the first demodulation winding assembly is connected to the first output terminal of the first modulation winding assembly, and the second input terminal of the first demodulation winding assembly is connected to the second end of the first coupling winding. The first demodulation capacitor, wherein the first terminal and the second terminal of the first demodulation capacitor are respectively connected to the first output terminal and the second output terminal of the first demodulation winding assembly; A first resonant filter capacitor, wherein a first end of the first resonant filter capacitor is connected to a second output end of the first modulation winding assembly, and a second end of the first resonant filter capacitor is connected to a first end of the first coupling winding. The second resonant filter capacitor has a first end connected to the second output end of the first modulation winding assembly, and a second end connected to the second input end of the first modulation winding assembly.

[0013] In a preferred embodiment of this application, in the aforementioned rotating equipment condition monitoring system, the second data communication circuit includes: The second resonant filter sub-circuit, wherein the first multiplexed terminal and the second multiplexed terminal of the second resonant filter sub-circuit are respectively connected to the first terminal and the second terminal of the second coupling winding; A downlink demodulation sub-circuit, wherein the first input terminal and the second input terminal of the downlink demodulation sub-circuit are respectively connected to the first output terminal and the second output terminal of the second resonant filter sub-circuit; A digital-to-analog converter sub-circuit, wherein the first input terminal and the second input terminal of the digital-to-analog converter sub-circuit are respectively connected to the first output terminal and the second output terminal of the downlink demodulation sub-circuit, and the first output terminal and the second output terminal of the digital-to-analog converter sub-circuit are respectively connected to the first input terminal and the second input terminal of the sensor, so as to transmit downlink control commands to the sensor; An uplink modulation sub-circuit, wherein the first output terminal and the second output terminal of the uplink modulation sub-circuit are respectively connected to the first input terminal and the second input terminal of the second resonant filter sub-circuit; An analog-to-digital converter sub-circuit, wherein the first output terminal and the second output terminal of the analog-to-digital converter sub-circuit are respectively connected to the first input terminal and the second input terminal of the uplink modulation sub-circuit; A signal conditioning sub-circuit, wherein the first and second output terminals of the signal conditioning sub-circuit are respectively connected to the first and second input terminals of the analog-to-digital conversion sub-circuit, and the first and second input terminals of the signal conditioning sub-circuit are respectively connected to the first and second output terminals of the sensor, so as to transmit the uplink status data of the sensor.

[0014] In a preferred embodiment of this application, in the aforementioned rotating equipment condition monitoring system, the second resonant filter sub-circuit includes: The second demodulation winding assembly, wherein the first output terminal and the second output terminal of the second demodulation winding assembly are respectively connected to the first input terminal and the second input terminal of the downlink demodulation sub-circuit; The second demodulation capacitor, wherein the first and second ends of the second demodulation capacitor are respectively connected to the first and second output ends of the second demodulation winding assembly; The second modulation winding assembly is provided, wherein the first input terminal and the second input terminal of the second modulation winding assembly are respectively connected to the first output terminal and the second output terminal of the uplink modulation sub-circuit, and the first output terminal of the second modulation winding assembly is connected to the first input terminal of the second demodulation winding assembly, and the second output terminal of the second modulation winding assembly is connected to the second end of the second coupling winding. The third resonant filter capacitor, wherein the first end of the third resonant filter capacitor is connected to the first end of the second coupling winding, and the second end of the third resonant filter capacitor is connected to the second input end of the second demodulation winding assembly; A fourth resonant filter capacitor, wherein the first end of the fourth resonant filter capacitor is connected to the second input end of the second demodulation winding assembly, and the second end of the fourth resonant filter capacitor is connected to the second output end of the second modulation winding assembly.

[0015] The rotating equipment condition monitoring system provided in this application includes: a sensor; a power transmission subsystem, wherein the power transmission subsystem includes a first power transmission circuit and a second power transmission circuit; a data communication subsystem, wherein the data communication subsystem includes a first data communication circuit and a second data communication circuit; and a common magnetic coupling subsystem, wherein the first power transmission circuit couples power supplied by an external power source to the second power transmission circuit through the common magnetic coupling subsystem to power the sensor, and the first data communication circuit and the second data communication circuit are coupled through the common magnetic coupling subsystem to realize communication transmission between the external communication device and the sensor. Based on the above, on the one hand, since the sensor is deployed on the rotating equipment that needs to be monitored, there is less interference and higher measurement accuracy compared to external indirect measurement methods. On the other hand, since both power transmission and communication transmission are based on magnetic coupling, the defects of contact brush and slip ring transmission methods, such as easy wear and signal interference, can be improved. Based on this, the rotating equipment condition monitoring system provided in this application can realize reliable monitoring of the condition of rotating equipment, thereby improving the problem of relatively low reliability of rotating equipment condition monitoring in the prior art. In addition, since power transmission and communication transmission are achieved through a shared magnetic coupling subsystem, the size and mass of the system can be reduced, thus minimizing the impact on rotating equipment. Attached Figure Description

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram illustrating the application of the rotating equipment condition monitoring system provided in the embodiments of this application.

[0018] Figure 2 The schematic diagram of the application circuit of the shared magnetic coupling subsystem provided in the embodiments of this application.

[0019] Figure 3 The schematic diagram of the application circuit of the power transmission subsystem provided in the embodiments of this application.

[0020] Figure 4 The schematic diagram of the application circuit of the data communication subsystem provided in the embodiments of this application.

[0021] Figure 5 The schematic diagram of the application circuit of the rotating equipment condition monitoring system provided in the embodiments of this application is shown. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] like Figure 1 As shown in the figure, this application provides a rotating equipment condition monitoring system. The rotating equipment condition monitoring system may include sensors, a power transmission subsystem, a data communication subsystem, and a shared magnetic coupling subsystem.

[0025] Specifically, the sensor is deployed on rotating equipment (such as a generator rotor, bearing, rotating shaft, etc.) that requires condition monitoring, and the sensor is used to monitor the condition of the rotating equipment (e.g., monitoring the temperature, shaft trajectory, internal stress, etc.). The power transmission subsystem includes a first power transmission circuit and a second power transmission circuit. The first power transmission circuit is used to connect to an external power source, and the second power transmission circuit is located on the rotating equipment and connected to the sensor. The data communication subsystem includes a first data communication circuit and a second data communication circuit. The first data communication circuit is used to connect to an external communication device, and the second data communication circuit is located on the rotating equipment and connected to the sensor. The shared magnetic coupling subsystem is connected to the first power transmission circuit, the second power transmission circuit, the first data communication circuit, and the second data communication circuit, respectively. The first power transmission circuit couples the power supplied by the external power source to the second power transmission circuit through the shared magnetic coupling subsystem to power the sensor. The first data communication circuit and the second data communication circuit are coupled through the shared magnetic coupling subsystem to realize the communication transmission of downlink control commands (downlink control commands refer to the control commands issued by the external communication device to the sensor, and the external communication device can be a host computer that can control whether the sensor performs data acquisition operations) and uplink status data of the sensor (uplink status data refers to the data formed by the sensor collecting the status of the rotating device and sending it to the external communication device).

[0026] Based on the above, on the one hand, since the sensors are deployed on the rotating equipment requiring condition monitoring, there is less interference and higher measurement accuracy compared to external indirect measurement methods. On the other hand, since both power transmission and communication transmission are based on magnetic coupling, the drawbacks of contact brush and slip ring transmission methods, such as easy wear and signal interference, can be overcome. Therefore, the rotating equipment condition monitoring system provided in this application can achieve reliable monitoring of the rotating equipment's condition, thereby improving the relatively low reliability of existing rotating equipment condition monitoring technologies. Furthermore, since power transmission and communication transmission are achieved through a shared magnetic coupling subsystem, the system's size and weight can be reduced (compared to schemes using different magnetic coupling subsystems), minimizing the impact on the rotating equipment.

[0027] Firstly, it should be noted that the specific configuration of the shared magnetic coupling subsystem is not limited and can be selected according to actual needs.

[0028] For example, in an alternative implementation, in order to achieve effective multiplexing of power transmission coupling and data transmission coupling, combined with Figure 2 The shared magnetic coupling subsystem may further include a first coupling winding (such as...) Figure 2 L in pt ) and second coupling winding (such as Figure 2 L in st ).

[0029] Specifically, the first and second ends of the first coupling winding are respectively connected to the first and second ends of the first power transmission circuit, and the first and second ends of the first coupling winding are respectively connected to the first and second ends of the first data communication circuit. The first and second ends of the second coupling winding are respectively connected to the first and second ends of the second power transmission circuit, and the first and second ends of the second coupling winding are respectively connected to the first and second ends of the second data communication circuit. The second coupling winding and the first coupling winding are magnetically coupled, enabling power transmission between the first and second power transmission circuits via magnetic coupling, and enabling data transmission between the first and second data communication circuits via magnetic coupling.

[0030] Secondly, it should be noted that the specific configuration of the first power transmission circuit is not limited and can be selected according to actual needs.

[0031] For example, in an alternative implementation, in order to effectively convert the DC power supply from the external power source into AC power, enabling efficient power transfer through the magnetic coupling of the shared magnetic coupling subsystem, combined with... Figure 3 The first power transmission circuit may include a power supply inverter sub-circuit, a first resonant compensation sub-circuit, and a first notch filter sub-circuit.

[0032] Specifically, the first DC terminal and the second DC terminal of the power supply inverter sub-circuit are used to connect to the positive and negative terminals of an external power supply, respectively. The first input terminal and the second input terminal of the first resonant compensation sub-circuit are connected to the first AC terminal and the second AC terminal of the power supply inverter sub-circuit, respectively. The first input terminal and the second input terminal of the first notch filter sub-circuit are connected to the first output terminal and the second output terminal of the first resonant compensation sub-circuit, respectively, and the first output terminal and the second output terminal of the first notch filter sub-circuit are connected to the first terminal and the second terminal of the first coupling winding, respectively.

[0033] It should be further noted that the power supply inverter sub-circuit can be a high-frequency bridge inverter, used to convert the external power supply (such as...) Figure 3 E in dcThe supplied DC power is converted into high-frequency AC power. The power supply inverter sub-circuit may include four switching devices, such as... Figure 3 S1, S2, S3, and S4 in the circuit. Additionally, the switching devices included in the power supply inverter sub-circuit can be connected to a controller (such as...). Figure 3 The stationary side controller (i.e., not deployed on the rotating equipment) is used for control.

[0034] It should be further noted that the first resonant compensator circuit can adopt a dual-sided LCC topology. Compared with typical topologies such as LCL and SP, the dual-sided LCC topology exhibits significant advantages in suppressing high-order harmonics and improving overall transmission efficiency. The dual-sided LCC topology can include, for example... Figure 3 L1, C1 and C p .

[0035] It should be further noted that the first notch circuit may include an inductor (such as...) Figure 3 L in b1 The inductor has high impedance characteristics at high frequencies, which makes the first notch circuit approximately open-circuit, thus isolating the power transmission loop formed by the first power transmission circuit and the second power transmission circuit from the signal transmission loop formed by the first data communication circuit and the second data communication circuit, ensuring the stability of dual-channel parallel transmission.

[0036] It should be further explained that the specific constituent elements of each sub-circuit in the first power transmission circuit and the connection relationships between the elements can be referred to... Figure 3 The connections between them will not be elaborated here.

[0037] Thirdly, it should be noted that the specific configuration of the second power transmission circuit is not limited and can be selected according to actual needs.

[0038] For example, in an alternative implementation, in order to effectively supply the electrical energy transmitted via magnetic coupling by the shared magnetic coupling subsystem to the sensor and ensure the normal state monitoring operation of the sensor, further combining... Figure 3 The second power transmission circuit may include a second notch filter circuit, a second resonant compensation circuit, and a power supply rectification and filtering circuit.

[0039] Specifically, the first and second input terminals of the second notch filter sub-circuit are respectively connected to the first and second terminals of the second coupling winding. The first and second input terminals of the second resonant compensation sub-circuit are respectively connected to the first and second output terminals of the second notch filter sub-circuit. The first AC terminal and second AC terminal of the power supply rectifier and filter sub-circuit are respectively connected to the first and second output terminals of the second resonant compensation sub-circuit, and the first DC terminal and second DC terminal of the power supply rectifier and filter sub-circuit are respectively connected to the positive and negative terminals of the sensor.

[0040] It should be further noted that the second notch circuit may include an inductor (such as...) Figure 3 L in b2 The inductor has high impedance characteristics at high frequencies, which makes the second notch circuit approximately open-circuit, thus isolating the power transmission loop formed by the first power transmission circuit and the second power transmission circuit from the signal transmission loop formed by the first data communication circuit and the second data communication circuit, ensuring the stability of dual-channel parallel transmission.

[0041] It should be further noted that the second resonant compensator circuit can adopt a dual-sided LCC topology. Compared with typical topologies such as LCL and SP, the dual-sided LCC topology exhibits significant advantages in suppressing high-order harmonics and improving overall transmission efficiency. The dual-sided LCC topology can include, for example... Figure 3 L2, C2 and C s .

[0042] It should be further noted that the power supply rectifier and filter sub-circuit can be used to convert AC power to DC power to supply power to the sensor. The power supply rectifier and filter sub-circuit may include four switching devices, such as... Figure 3 The four diodes are VD1, VD2, VD3, and VD4. Additionally, in some embodiments, the switching devices in the power supply rectifier filter sub-circuit can also be thyristors (having an anode, cathode, and control electrode, and can be controlled by a controller, such as...). Figure 3 The rotating side controller, i.e., the controller deployed on the rotating device. Additionally, the power supply rectifier and filter sub-circuit can also utilize capacitors (such as...). Figure 3 A capacitor connected in parallel with the sensor is used to filter the rectified DC output, thereby further improving the stability of the power supply.

[0043] Fourthly, it should be noted that the specific configuration of the first data communication circuit is not limited and can be selected according to actual needs.

[0044] For example, in an alternative implementation, in order to effectively send control commands from the external communication device and effectively receive the status data of the sensor, the first data communication circuit may include a downlink modulation sub-circuit, an uplink demodulation sub-circuit, and a first resonant filter sub-circuit.

[0045] In detail, combined Figure 4 The first and second input terminals of the downlink modulation sub-circuit are respectively connected to the first and second output terminals of an external communication device. The first and second output terminals of the uplink demodulation sub-circuit are respectively connected to the first and second input terminals of the external communication device. The first and second input terminals of the first resonant filter sub-circuit are respectively connected to the first and second output terminals of the downlink modulation sub-circuit, and the first and second output terminals of the first resonant filter sub-circuit are respectively connected to the first and second input terminals of the uplink demodulation sub-circuit. Furthermore, the first and second multiplexed terminals of the first resonant filter sub-circuit are respectively connected to the first and second terminals of the first coupling winding.

[0046] In other words, the control commands of the external communication device can be modulated, resonated and filtered by the downlink modulation sub-circuit and the first resonant filter sub-circuit, and then transmitted to the first coupling winding, and then transmitted to the second coupling winding through magnetic coupling.

[0047] After the sensor's status data is transmitted from the second coupling winding to the first coupling winding via magnetic coupling, it can be processed by resonance, filtering, and demodulation through the first resonant filter sub-circuit and the uplink demodulation sub-circuit before being transmitted to the external communication device.

[0048] It should be further noted that the modulation method of the downlink modulator sub-circuit can be frequency shift keying (FSK). The connection method of the downlink modulator sub-circuit can be referred to... Figure 4 As shown.

[0049] It should be further noted that the demodulation method of the uplink demodulation sub-circuit can be coherent demodulation. The connection method of the uplink demodulation sub-circuit can be referred to... Figure 4 As shown.

[0050] It should be further noted that the first resonant filter sub-circuit may further include a first modulation winding assembly (such as...). Figure 4 L in dt1 ), the first demodulation winding assembly (such as Figure 4 L in dr1 ), the first demodulation capacitor (such as Figure 4 C in dr1 ), first resonant filter capacitor (such as Figure 4 C in d2 ) and the second resonant filter capacitor (such as Figure 4 C in d1 ).

[0051] Specifically, the first and second input terminals of the first modulation winding assembly are respectively connected to the first and second output terminals of the downlink modulation sub-circuit. The first and second output terminals of the first demodulation winding assembly are respectively connected to the first and second input terminals of the uplink demodulation sub-circuit, and the first input terminal of the first demodulation winding assembly is connected to the first output terminal of the first modulation winding assembly, while the second input terminal of the first demodulation winding assembly is connected to the second terminal of the first coupling winding. The first and second terminals of the first demodulation capacitor are respectively connected to the first and second output terminals of the first demodulation winding assembly. The first terminal of the first resonant filter capacitor is connected to the second output terminal of the first modulation winding assembly, and the second terminal of the first resonant filter capacitor is connected to the first terminal of the first coupling winding. The first terminal of the second resonant filter capacitor is connected to the second output terminal of the first modulation winding assembly, and the second terminal of the second resonant filter capacitor is connected to the second input terminal of the first modulation winding assembly.

[0052] Fifthly, it should be noted that the specific configuration of the second data communication circuit is not limited and can be selected according to actual needs.

[0053] For example, in an alternative implementation, in order to effectively issue control commands from the external communication device and effectively receive the status data from the sensor, the second data communication circuit may include a second resonant filter sub-circuit, a downlink demodulation sub-circuit, a digital-to-analog converter sub-circuit, an uplink modulation sub-circuit, an analog-to-digital converter sub-circuit, and a signal conditioning sub-circuit.

[0054] Specifically, the first and second multiplexed terminals of the second resonant filter sub-circuit are respectively connected to the first and second terminals of the second coupling winding. The first and second input terminals of the downlink demodulation sub-circuit are respectively connected to the first and second output terminals of the second resonant filter sub-circuit. The first and second input terminals of the digital-to-analog converter sub-circuit are respectively connected to the first and second output terminals of the downlink demodulation sub-circuit, and the first and second output terminals of the digital-to-analog converter sub-circuit are respectively connected to the first and second input terminals of the sensor to transmit downlink control commands to the sensor. The first and second output terminals of the uplink modulation sub-circuit are respectively connected to the first and second input terminals of the second resonant filter sub-circuit. The first and second output terminals of the analog-to-digital converter sub-circuit are respectively connected to the first and second input terminals of the uplink modulation sub-circuit. The first and second output terminals of the signal conditioning sub-circuit are respectively connected to the first and second input terminals of the analog-to-digital converter sub-circuit, and the first and second input terminals of the signal conditioning sub-circuit are respectively connected to the first and second output terminals of the sensor to transmit uplink status data of the sensor.

[0055] In other words, after the second coupling winding receives the downlink control command via magnetic coupling, it can undergo resonance, filtering, demodulation, and digital-to-analog conversion processing through the second resonant filter sub-circuit, the downlink demodulation sub-circuit, and the digital-to-analog converter sub-circuit, and then be transmitted to the sensor. After the sensor generates uplink status data, it can undergo signal conditioning, analog-to-digital conversion, modulation, resonance, and filtering processing through the signal conditioning sub-circuit, the analog-to-digital converter sub-circuit, the uplink modulation sub-circuit, and the second resonant filter sub-circuit, and then be transmitted to the first coupling winding via magnetic coupling through the second coupling winding.

[0056] It should be further noted that the second resonant filter sub-circuit may include a second demodulation winding assembly (such as...). Figure 4 L in dr2 ), second demodulation capacitor (such as Figure 4 C in dr2 ), and the second modulation winding assembly (such as Figure 4 L in dt2 ), third resonant filter capacitor (such as Figure 4 C in d3 ) and the fourth resonant filter capacitor (such as Figure 4 C in d4 ).

[0057] Specifically, the first and second output terminals of the second demodulation winding assembly are respectively connected to the first and second input terminals of the downlink demodulation sub-circuit. The first and second terminals of the second demodulation capacitor are respectively connected to the first and second output terminals of the second demodulation winding assembly. The first and second input terminals of the second modulation winding assembly are respectively connected to the first and second output terminals of the uplink modulation sub-circuit, and the first output terminal of the second modulation winding assembly is connected to the first input terminal of the second demodulation winding assembly, while the second output terminal of the second modulation winding assembly is connected to the second terminal of the second coupling winding. The first terminal of the third resonant filter capacitor is connected to the first terminal of the second coupling winding, and the second terminal of the third resonant filter capacitor is connected to the second input terminal of the second demodulation winding assembly. The first terminal of the fourth resonant filter capacitor is connected to the second input terminal of the second demodulation winding assembly, and the second terminal of the fourth resonant filter capacitor is connected to the second output terminal of the second modulation winding assembly.

[0058] It should be further noted that the demodulation method of the downlink demodulation sub-circuit can be coherent demodulation, and the specific connection method can be referred to Figure 4 The circuit connection is shown.

[0059] It should be further noted that the digital-to-analog converter sub-circuit can be any device with digital-to-analog conversion function, and the specific configuration is not specifically limited here.

[0060] It should be further noted that the modulation method of the uplink modulator sub-circuit can be frequency shift keying (FSK). The connection method of the uplink modulator sub-circuit can be referred to... Figure 4 As shown.

[0061] It should be further noted that the analog-to-digital converter sub-circuit can be any device with analog-to-digital conversion function, and its specific configuration is not specifically limited here. It should be further noted that the signal conditioning sub-circuit can have conditioning functions such as filtering and amplification, and the specific configuration can be referred to the relevant existing technology.

[0062] It should be further explained that the principle of the application circuit of the rotating equipment condition monitoring system can be as follows: Figure 5 As shown. Furthermore, the data communication subsystem requires further explanation as follows: Uplink information (uplink status data) transmission (rotating side "rotating equipment" → stationary side): Data such as temperature, vibration, and strain measured by sensors are collected. The analog signals are converted into digital signals after filtering, amplification, and signal conditioning. Then, frequency shift keying is used to modulate the digital signals to obtain a high-frequency signal carrier. The high-frequency signal carrier is injected into the energy circuit through inductive coupling. To obtain higher channel gain, the coupling coil is used as an injection inductor for multiplexing. After transmission to the receiving side, the filter removes the low-frequency energy carrier, leaving the signal carrier. Then, coherent demodulation is performed, and the signal is transmitted to the host computer (i.e., external communication equipment). Downlink signal (downlink control command) transmission (stationary side → rotating side): The command issued by the host computer is modulated and resonated and then sent to the rotating side through the same wireless channel. After receiving the signal, the rotating side demodulates and recovers the digital command. If the command is in digital form (such as parameter configuration or mode switching), it is directly executed by the controller. If analog control signals are required (such as excitation voltage setting), they are output to the corresponding sensor or actuator after digital-to-analog conversion.

[0063] In addition, to ensure that uplink and downlink communication are not affected, full-duplex communication can be used.

[0064] It should be further explained that, to reduce the impact of the embedded device on the rotating device, the size and weight of the device can be limited. Therefore, instead of using parallel signal and energy transmission channels, a carrier modulation-based simultaneous energy and signal transmission technology can be selected. This involves loading the signal carrier onto a high-frequency carrier, then injecting the energy carrier, and transmitting it to the receiving side, thus achieving channel multiplexing. To achieve effective isolation between the energy loop and the signal loop, a notch filter circuit is set up for the high-frequency carrier. This notch filter circuit exhibits high impedance characteristics at the signal carrier frequency, making the energy transmission loop approximately open-circuited for that frequency signal, suppressing mutual interference between the two loops.

[0065] Based on the above-mentioned rotating equipment condition monitoring system, the following superior technical effects can be achieved: High reliability: No contact wear, lifespan far exceeds that of slip ring systems, suitable for long-term continuous operation; High safety: No electrical sparks generated, suitable for flammable, explosive and other special environments; Low maintenance cost: Eliminates the need for regular brush replacement and slip ring cleaning, reducing total lifespan cost; Excellent data quality: Avoids signal noise caused by contact resistance, improving monitoring accuracy; Flexible installation: Not limited by surface space of rotating equipment, enabling status monitoring of concealed parts; Intelligent early warning capability: Achieves early fault warning and predictive maintenance through continuous monitoring and data analysis.

[0066] In summary, the rotating equipment condition monitoring system provided in this application includes: a sensor; a power transmission subsystem, wherein the power transmission subsystem includes a first power transmission circuit and a second power transmission circuit; a data communication subsystem, wherein the data communication subsystem includes a first data communication circuit and a second data communication circuit; and a common magnetic coupling subsystem, wherein the first power transmission circuit couples power supplied by an external power source to the second power transmission circuit through the common magnetic coupling subsystem to power the sensor, and the first data communication circuit and the second data communication circuit are coupled through the common magnetic coupling subsystem to realize communication transmission between the external communication device and the sensor. Based on the above, on the one hand, since the sensor is deployed on the rotating equipment that needs to be monitored, there is less interference and higher measurement accuracy compared to external indirect measurement methods. On the other hand, since both power transmission and communication transmission are based on magnetic coupling, the defects of contact brush and slip ring transmission methods, such as easy wear and signal interference, can be improved. Based on this, the rotating equipment condition monitoring system provided in this application can reliably monitor the condition of rotating equipment, thereby improving the problem of relatively low reliability in the prior art for rotating equipment condition monitoring. Furthermore, since power transmission and communication transmission are achieved through a shared magnetic coupling subsystem, the system's size and weight can be reduced, minimizing the impact on the rotating equipment.

[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rotating equipment condition monitoring system, characterized in that, include: A sensor, wherein the sensor is deployed on a rotating device that requires status monitoring, and the sensor is used to monitor the status of the rotating device; A power transmission subsystem, comprising a first power transmission circuit and a second power transmission circuit, wherein the first power transmission circuit is used to connect to an external power source, the second power transmission circuit is disposed on the rotating device, and the second power transmission circuit is connected to the sensor. A data communication subsystem, comprising a first data communication circuit and a second data communication circuit, wherein the first data communication circuit is used to connect to an external communication device, the second data communication circuit is disposed in the rotating device, and the second data communication circuit is connected to the sensor; A shared magnetic coupling subsystem is provided, wherein the shared magnetic coupling subsystem is connected to the first power transmission circuit, the second power transmission circuit, the first data communication circuit, and the second data communication circuit, respectively. The first power transmission circuit couples the power supplied by the external power source to the second power transmission circuit through the shared magnetic coupling subsystem to power the sensor. The first data communication circuit and the second data communication circuit are coupled through the shared magnetic coupling subsystem to realize the communication transmission of downlink control commands from the external communication device and uplink status data from the sensor.

2. The rotating equipment condition monitoring system according to claim 1, characterized in that, The shared magnetic coupling subsystem includes: A first coupling winding, wherein a first end and a second end of the first coupling winding are respectively connected to a first end and a second end of the first power transmission circuit, and the first end and a second end of the first coupling winding are respectively connected to a first end and a second end of the first data communication circuit. The second coupling winding has a first end and a second end connected to the first end and the second end of the second power transmission circuit, respectively, and the first end and the second end of the second coupling winding are connected to the first end and the second end of the second data communication circuit, respectively. The second coupling winding and the first coupling winding are magnetically coupled, so that the first power transmission circuit and the second power transmission circuit can transmit power through magnetic coupling, and the first data communication circuit and the second data communication circuit can transmit data through magnetic coupling.

3. The rotating equipment condition monitoring system according to claim 2, characterized in that, The first power transmission circuit includes: A power supply inverter sub-circuit, wherein the first DC terminal and the second DC terminal of the power supply inverter sub-circuit are respectively connected to the positive and negative terminals of an external power supply; The first resonant compensation sub-circuit, wherein the first input terminal and the second input terminal of the first resonant compensation sub-circuit are respectively connected to the first AC terminal and the second AC terminal of the power supply inverter sub-circuit. The first notch circuit is provided, wherein the first input terminal and the second input terminal of the first notch circuit are respectively connected to the first output terminal and the second output terminal of the first resonant compensation circuit, and the first output terminal and the second output terminal of the first notch circuit are respectively connected to the first end and the second end of the first coupling winding.

4. The rotating equipment condition monitoring system according to claim 3, characterized in that, The first notch filter circuit includes an inductor that has high impedance characteristics at high frequencies to isolate the power transmission loop formed by the first power transmission circuit and the second power transmission circuit from the signal transmission loop formed by the first data communication circuit and the second data communication circuit.

5. The rotating equipment condition monitoring system according to claim 2, characterized in that, The second power transmission circuit includes: The second notch circuit, wherein the first input terminal and the second input terminal of the second notch circuit are respectively connected to the first terminal and the second terminal of the second coupling winding; The second resonant compensation sub-circuit, wherein the first input terminal and the second input terminal of the second resonant compensation sub-circuit are respectively connected to the first output terminal and the second output terminal of the second notch sub-circuit; A power supply rectifier and filter sub-circuit, wherein the first AC terminal and the second AC terminal of the power supply rectifier and filter sub-circuit are respectively connected to the first output terminal and the second output terminal of the second resonant compensation sub-circuit, and the first DC terminal and the second DC terminal of the power supply rectifier and filter sub-circuit are respectively connected to the positive and negative terminals of the sensor.

6. The rotating equipment condition monitoring system according to claim 5, characterized in that, The second notch circuit includes an inductor that has high impedance characteristics at high frequencies to isolate the power transmission loop formed by the first power transmission circuit and the second power transmission circuit from the signal transmission loop formed by the first data communication circuit and the second data communication circuit.

7. The rotating equipment condition monitoring system according to claim 2, characterized in that, The first data communication circuit includes: A downlink modulation sub-circuit, wherein the first input terminal and the second input terminal of the downlink modulation sub-circuit are respectively connected to the first output terminal and the second output terminal of an external communication device; An uplink demodulation circuit, wherein the first output terminal and the second output terminal of the uplink demodulation circuit are respectively connected to the first input terminal and the second input terminal of the external communication device; The first resonant filter sub-circuit is provided, wherein the first input terminal and the second input terminal of the first resonant filter sub-circuit are respectively connected to the first output terminal and the second output terminal of the downlink modulation sub-circuit, the first output terminal and the second output terminal of the first resonant filter sub-circuit are respectively connected to the first input terminal and the second input terminal of the uplink demodulation sub-circuit, and the first multiplexed terminal and the second multiplexed terminal of the first resonant filter sub-circuit are respectively connected to the first terminal and the second terminal of the first coupling winding.

8. The rotating equipment condition monitoring system according to claim 7, characterized in that, The first resonant filter sub-circuit includes: A first modulation winding assembly, wherein the first input terminal and the second input terminal of the first modulation winding assembly are respectively connected to the first output terminal and the second output terminal of the downlink modulation sub-circuit; The first demodulation winding assembly is provided, wherein the first output terminal and the second output terminal of the first demodulation winding assembly are respectively connected to the first input terminal and the second input terminal of the uplink demodulation sub-circuit, and the first input terminal of the first demodulation winding assembly is connected to the first output terminal of the first modulation winding assembly, and the second input terminal of the first demodulation winding assembly is connected to the second end of the first coupling winding. The first demodulation capacitor, wherein the first terminal and the second terminal of the first demodulation capacitor are respectively connected to the first output terminal and the second output terminal of the first demodulation winding assembly; A first resonant filter capacitor, wherein a first end of the first resonant filter capacitor is connected to a second output end of the first modulation winding assembly, and a second end of the first resonant filter capacitor is connected to a first end of the first coupling winding. The second resonant filter capacitor has a first end connected to the second output end of the first modulation winding assembly, and a second end connected to the second input end of the first modulation winding assembly.

9. The rotating equipment condition monitoring system according to claim 2, characterized in that, The second data communication circuit includes: The second resonant filter sub-circuit, wherein the first multiplexed terminal and the second multiplexed terminal of the second resonant filter sub-circuit are respectively connected to the first terminal and the second terminal of the second coupling winding; A downlink demodulation sub-circuit, wherein the first input terminal and the second input terminal of the downlink demodulation sub-circuit are respectively connected to the first output terminal and the second output terminal of the second resonant filter sub-circuit; A digital-to-analog converter sub-circuit, wherein the first input terminal and the second input terminal of the digital-to-analog converter sub-circuit are respectively connected to the first output terminal and the second output terminal of the downlink demodulation sub-circuit, and the first output terminal and the second output terminal of the digital-to-analog converter sub-circuit are respectively connected to the first input terminal and the second input terminal of the sensor, so as to transmit downlink control commands to the sensor; An uplink modulation sub-circuit, wherein the first output terminal and the second output terminal of the uplink modulation sub-circuit are respectively connected to the first input terminal and the second input terminal of the second resonant filter sub-circuit; An analog-to-digital converter sub-circuit, wherein the first output terminal and the second output terminal of the analog-to-digital converter sub-circuit are respectively connected to the first input terminal and the second input terminal of the uplink modulation sub-circuit; A signal conditioning sub-circuit, wherein the first and second output terminals of the signal conditioning sub-circuit are respectively connected to the first and second input terminals of the analog-to-digital conversion sub-circuit, and the first and second input terminals of the signal conditioning sub-circuit are respectively connected to the first and second output terminals of the sensor, so as to transmit the uplink status data of the sensor.

10. The rotating equipment condition monitoring system according to claim 9, characterized in that, The second resonant filter sub-circuit includes: The second demodulation winding assembly, wherein the first output terminal and the second output terminal of the second demodulation winding assembly are respectively connected to the first input terminal and the second input terminal of the downlink demodulation sub-circuit; The second demodulation capacitor, wherein the first terminal and the second terminal of the second demodulation capacitor are respectively connected to the first output terminal and the second output terminal of the second demodulation winding assembly; The second modulation winding assembly is provided, wherein the first input terminal and the second input terminal of the second modulation winding assembly are respectively connected to the first output terminal and the second output terminal of the uplink modulation sub-circuit, and the first output terminal of the second modulation winding assembly is connected to the first input terminal of the second demodulation winding assembly, and the second output terminal of the second modulation winding assembly is connected to the second end of the second coupling winding. The third resonant filter capacitor, wherein the first end of the third resonant filter capacitor is connected to the first end of the second coupling winding, and the second end of the third resonant filter capacitor is connected to the second input end of the second demodulation winding assembly; A fourth resonant filter capacitor, wherein the first end of the fourth resonant filter capacitor is connected to the second input end of the second demodulation winding assembly, and the second end of the fourth resonant filter capacitor is connected to the second output end of the second modulation winding assembly.

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