Slip ring devices, and methods and systems for transmitting slip ring data for medical scanning devices
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- SHANGHAI UNITED IMAGING HEALTHCARE
- Filing Date
- 2024-08-14
- Publication Date
- 2026-07-01
AI Technical Summary
In X-ray Computed Tomography (CT) systems, the transmission of data signals through slip rings is hindered by multipath effects, leading to reduced data transmission rates and susceptibility to electromagnetic interference and noise from electrical loads.
A slip ring device with a slip ring transmission module and power line communication modules that adjust the frequency of data signals to enable efficient transmission, while also incorporating a signal anti-interference module to mitigate electromagnetic interference.
The solution achieves fast and accurate data transmission, reducing the impact of multipath effects and electromagnetic interference, thereby enhancing the reliability and efficiency of data transmission in medical scanning devices.
Smart Images

Figure CN2024112182_20022025_PF_FP_ABST
Abstract
Description
SLIP RING DEVICES, AND METHODS AND SYSTEMS FOR TRANSMITTING SLIP RING DATA FOR MEDICAL SCANNING DEVICES
[0001] CROSS-REFERENCE TO RELATED APPLICATIONS
[0002] This application claims priority to Chinese Patent Application No. 202311020879.1 filed on August 14, 2023, Chinese Patent Application No. 202322186054.9 filed on August 14, 2023, and Chinese Patent Application No.202311245270.4, filed on September 25, 2023, the entire contents of each of which are hereby incorporated by reference.TECHNICAL FIELD
[0003] The present disclosure relates to the field of medical devices, and in particular, to a slip ring device, and a method and a system for transmitting slip ring data for a medical scanning device.BACKGROUND
[0004] In X-ray Computed Tomography (CT) systems, a slip ring structure may be used to solve a problem related to the power and data transmission between a rotating portion and a stationary portion of a gantry. A slip ring and a carbon brush may be used to form a power transmission slideway. When the carbon brush slides along the slip ring, the electrical power may be supplied to the rotating portion (such as an X-ray tube) through the slip ring and the carbon brush, and data transmission may be performed via power line communication (PLC) to achieve continuous scanning.
[0005] However, when a rotor is rotating, the transmission of the data signals on the slip ring track may result in a significant reduction in data transmission rate due to multipath effects. Additionally, transmission circuits may be susceptible to interference from electromagnetic environments, and noises generated by an electrical load of the system may also affect data transmission.
[0006] Therefore, it is necessary to provide a slip ring device, and a method and a system for transmitting slip ring data for a medical scanning device, which achieves fast and accurate data transmission while ensuring the design and structural costs.SUMMARY
[0007] One of the embodiments of the present disclosure provides a slip ring device for a medical scanning device. The slip ring device includes a slip ring transmission module and at least two power line communication modules. The slip ring transmission module includes at least one transmission circuit. The at least two power line communication modules are configured to adjust a frequency of data signal s to enable the data signals to be transmitted in the transmission circuit. Each of the first transmission end and the second transmission end is provided with at least one of the at least two power line communication modules.
[0008] One of the embodiments of the present disclosure provides a method of transmitting slip ring data for a medical scanning device. The method includes receiving data signals to be transmitted from a first transmission end; obtaining modulated data signals by modulating the data signal based on a communication calibration table to change a frequency of the data signal; and sending the modulated data signal to a second transmission end via at least one transmission circuit.
[0009] One of the embodiments of the present disclosure provides a system for transmitting slip ring data for a medical scanning device. The system includes a receiving module configured to receive data signals to be transmitted from a first transmission end; a modulation module configured to obtain modulated data signals by modulating the data signal based on a communication calibration table to change a frequency of the data signal; and a transmission module configured to transmit modulated data signal to a second transmission end via at least one transmission circuit.
[0010] One of the embodiments of the present disclosure provides a slip ring device for a medical scanning device. The slip ring device includes a slip ring disk and a conductive assembly. The slip ring disk is disposed at a rotating assembly of the medical scanning device and the conductive assembly is disposed at a fixed assembly of the gantry of the medical scanning device, or the slip ring disk is disposed at the fixed assembly of the gantry of the medical scanning device and the conductive assembly is disposed at the rotating assembly of the gantry of the medical scanning device. The slip ring disk and the conductive assembly are in sliding contact, and the slip ring disk is able to rotate relative to the conductive assembly. The slip ring disk includes at least one slideway. The at least one slideway includes at least one blocking portion.
[0011] One of the embodiments of the present disclosure provides a slip ring device. The slip ring device includes a slip ring transmission module and at least two power line communication modules. The slip ring transmission module forms at least one transmission circuit. The at least two transmission circuits are configured to obtain electrical power through a first transmission end of the transmission circuit and then output the electrical power to a load via a second transmission end of the transmission circuit. Each of the first transmission end and the second transmission end is provided with at least one of the at least two power line communication modules, and the at least two power line communication modules are configured to adjust a frequency of data signals to enable the data signal to be transmitted from the second transmission end to a master control module located at the first transmission end. The data signal include a medical image data signals.
[0012] One of the embodiments of the present disclosure provides a power line communication device. The device includes a slip ring transmission module, at least two power line communication modules, and a signal anti-interference module. The slip ring transmission module forms at least one transmission circuit. Each of the first transmission end and the second transmission end is provided with one of the at least two power line communication modules , and the at least two power line communication modules are configured to adjust a frequency of data signals to enable the data signals to be transmitted in the transmission circuit. The signal anti-interference module provided in one of the at least one transmission circuit.
[0013] One of the embodiments of the present disclosure provides a slip ring device for a medical scanning device. The slip ring device includes a slip ring disk and a conductive assembly. The slip ring disk is disposed at a rotating assembly of a gantry of the medical scanning device and the conductive assembly is disposed at a fixed assembly of thethe gantry of the medical scanning device, or the slip ring disk is disposed at the fixed assembly of the gantry of the medical scanning device and the conductive assembly is disposed at the rotating assembly of the gantry of the medical scanning device. The slip ring disk and the conductive assembly are in sliding contact, and the slip ring disk is able to rotate relative to the conductive assembly. The slip ring disk (310) includes at least one slideway. The conductive assembly is electrically connected to the at least one slideway through at least two connecting lines.
[0014] Some embodiments of the present disclosure include but are not limited to the following beneficial effects. Electrical. Power transmission inside the medical scanning device is realized through the at least one transmission circuit of the slip ring transmission module, and data signal transmission is realized through the power line communication modules. The combination of the two can simplify the structure of the slip ring device and reduce the design cost while ensuing the power transmission and data signal transmission.BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present disclosure is further illustrated in terms of exemplary embodiments. These exemplary embodiments are described in detail with reference to according to the drawings. These embodiments are non-limiting exemplary embodiments, in which like reference numerals represent similar structures, and wherein:
[0016] FIG. 1 is a schematic diagram illustrating an exemplary medical imaging system according to some embodiments of the present disclosure;
[0017] FIG. 2 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure;
[0018] FIG. 3 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure;
[0019] FIG. 4 is a schematic diagram illustrating an exemplary slip ring device for a medical scanning device according to some embodiments of the present disclosure;
[0020] FIG. 5 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure;
[0021] FIG. 6 is a diagram illustrating an exemplary non-segmented slip ring device according to some embodiments of the present disclosure;
[0022] FIG. 7 is a diagram illustrating an exemplary segmented slip ring device according to some embodiments of the present disclosure;
[0023] FIG. 8 is another diagram illustrating an exemplary segmented slip ring device according to some embodiments of the present disclosure;
[0024] FIG. 9 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure;
[0025] FIG. 10 is a schematic diagram illustrating a variation period and a variation magnitude of influencing factors (transmission paths) of an existing multipath effect according to some embodiments of the present disclosure;
[0026] FIG. 11 is a schematic diagram illustrating a variation period and a variation magnitude of influencing factors (transmission paths) of an existing multipath effect of a slip ring device according to some embodiments of the present disclosure;
[0027] FIG. 12 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure;
[0028] FIG. 13 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure;
[0029] FIG. 14 is a schematic diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure;
[0030] FIG. 15 is a schematic diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure;
[0031] FIG. 16 is a schematic diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure;
[0032] FIG. 17 is a schematic diagram illustrating an exemplary power line communication device according to some embodiments of the present disclosure;
[0033] FIG. 18 is a schematic diagram illustrating an exemplary power line communication device according to some embodiments of the present disclosure;
[0034] FIG. 19 is a flowchart illustrating an exemplary process for transmitting slip ring data for a medical scanning device according to some embodiments of the present disclosure;
[0035] FIG. 20 is a flowchart illustrating an exemplary process for determining a preset communication calibration table according to some embodiments of the present disclosure;
[0036] FIG. 21 is a diagram illustrating an exemplary system for transmitting slip ring data for a medical scanning device according to some embodiments of the present disclosure; and
[0037] FIG. 22 is a diagram illustrating an exemplary slip ring disk and an exemplary conductive assembly according to some embodiments of the present disclosure.DETAILED DESCRIPTION
[0038] To more clearly illustrate the technical solutions related to the embodiments of the present disclosure, a brief introduction of the drawings referred to the description of the embodiments is provided below. Obviously, the drawings described below are only some examples or embodiments of the present disclosure. Those having ordinary skills in the art, without further creative efforts, may apply the present disclosure to other similar scenarios according to these drawings. Unless obviously obtained from the context or the context illustrates otherwise, the same numeral in the drawings refers to the same structure or operation.
[0039] It should be understood that "system" , "device" , "unit" and / or "module" as used herein is a manner used to distinguish different components, elements, parts, sections, or assemblies at different levels. However, if other words serve the same purpose, the words may be replaced by other expressions.
[0040] As shown in the present disclosure and claims, the words "one" , "a" , "a kind" and / or "the" are not especially singular but may include the plural unless the context expressly suggests otherwise. In general, the terms “comprise, ” "comprises, ” “comprising, ” “include, ” “includes, ” and / or “including, ” merely prompt to include operations and elements that have been clearly identified, and these operations and elements do not constitute an exclusive listing. The methods or devices may also include other operations or elements.
[0041] The flowcharts used in the present disclosure illustrate operations that systems implement according to some embodiments of the present disclosure. It should be understood that the previous or subsequent operations may not be accurately implemented in order. Instead, each step may be processed in reverse order or simultaneously. Meanwhile, other operations may also be added to these processes, or a certain step or several steps may be removed from these processes.
[0042] In an computed tomography (CT) system, a slip ring structure may be configured to solve a problem related to the power and data transmission between a rotating portion and a stationary portion of a gantry. A slip ring and a carbon brush may be used to form a power transmission slideway. When the carbon brush slides along the slip ring, electrical power may be supplied to the rotating portion (such as an X-ray tube) through the slip ring and the carbon brush. In addition, data signal transmission in the power transmission slideway may be realized via power line communication (PLC) performed on the slide ring, and at least one transmission circuit may be formed by cooperating with a power line to transmit data and signals to corresponding devices, thus realizing continuous scanning.
[0043] However, when the rotating portion is rotating, a multipath effect may be generated on a slip ring track, which results in a significant reduction in the data transmission rate. Additionally, the transmission circuit is susceptible to interference from the electromagnetic environment, leading to bit errors and packet losses during the signal transmission, which results in an unstable signal transmission rate and a lower transmission rate. Various electrical loads accessed by the transmission circuit (e.g., tubes and high-voltage systems, or various switching power supplies, heat dissipation modules, etc. ) may generate different noises, which may also exacerbate the interference during the transmission of data signals. In addition, a power source side (e.g., a power distribution unit) of the CT introduces various noises on the grid, which are further transmitted to the transmission circuit, affecting the transmission of the data signals. Therefore, it is desirable to provide a slip ring device, and a method and a system for transmitting slip ring data for a medical scanning device, which achieves fast and accurate data transmission while ensuring the design and structural costs.
[0044] FIG. 1 is a schematic diagram illustrating an exemplary medical imaging system according to some embodiments of the present disclosure.
[0045] As shown in FIG. 1, an embodiment of the present disclosure provides a medical imaging system 100, which may be a computed tomography (CT) system including an image acquisition module 110, a scanner gantry 120, a control module 130, and an examination bed 140.
[0046] The scanner gantry 120 includes a fixed portion 121 and a rotating portion 122, and the rotating portion 122 is rotatable relative to the fixed portion 121. The scanner gantry 120 also has a scanning hole 123, and the scanning hole 123 is provided on the rotating portion 122. The examination bed 140, which serves as a carrier for carrying a scanning object 141, is accessible to the scanning hole 123.
[0047] The image acquisition module 110 includes a tube 111 and a detector 112. The tube 111 and the detector 112 are provided on the rotating portion 122, and the tube 111 and the detector 112 are symmetrically provided on two sides of a radial direction of the scanning hole 123. The tube 111 and the detector 112 serve as a core component for scanning and imaging in the CT system. The tube 111 emits electron rays (e.g., X-rays) , the electron rays are received by the detector 112 after passing through the scanning object 141, and X-ray imaging scanning inspection is performed on the scanning object 14 with the cooperation of the tube 111 and the detector 112, to obtain medical image data signals related to the scanning object 141. The medical image data signals are transmitted to the control module 130 for processing the medical image data signal, such as reconstructing a medical image of the scanning object 141 according to a reconstruction algorithm.
[0048] In a practical application scenario, the scanning object 141 lies flat on the examination bed 140, and as the examination bed 140 enters into the scanning hole 123, synchronously, the rotating portion 122 may drive the tube 111 and the detector 112 to rotate relative to the fixed portion 121 (specifically, the rotating portion 122 move in a circular around the central axis of the scanning hole 123) , to carry out a helical scanning on the scanning object 141.
[0049] In some embodiments, the medical imaging system may further include a receiving module, a modulation module, and a transmission module. The receiving module may be configured to receive data signals to be transmitted from a first transmission end. The modulation module may be configured to modulate the data signals based on a communication calibration table to change the frequency of the data signals. The transmission module may be configured to send modulated data signals to a second transmission end via at least one transmission circuit. In some embodiments, the medical imaging system may further include a demodulation module. The demodulation module may be configured to demodulate the received data signals based on a communication calibration table via the second transmission end.
[0050] It should be noted that the above description of the medical imaging system is provided for illustrative purposes only and is not intended to limit the scope of the present disclosure. A plurality of modifications or variations may be made to the description of the present disclosure for those of ordinary skill in the art. For example, the medical imaging system may also include a database. As another example, the medical imaging system may implement similar or different functionality on other devices. However, these modifications or variations do not depart from the scope of the present disclosure.
[0051] FIG. 2 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure. In some embodiments, the slip ring device 200 includes a slip ring transmission module 210 and at least two power line communication modules 220.
[0052] The slip ring transmission module 210 is a functional module in a slip ring device for enabling data and / or powertransmission. In some embodiments, the slip ring transmission module includes at least one transmission circuit. The at least one transmission circuit is configured to output electrical power obtained from a first transmission end to a load via a second transmission end.
[0053] In some embodiments, a transmission circuit among the at least one transmission circuit may include a slip ring disk, a conductive assembly within the slip ring transmission module 210, and power line connected to the slip ring disk and the conductive assembly, respectively, (e.g., the lines and their connecting components are bolded in FIG. 14) . For example, the transmission circuit may be configured to transmit a voltage of 220V to supply the electrical power to the load.
[0054] In some embodiments, the transmission circuit may obtain electrical power provided by a power source via a first transmission end A (e.g., end A in FIG, 14) of the transmission circuit and then output the electrical power to the load via a second transmission end B (e.g., end B in FIG, 14) of the transmission circuit to supply power to the load.
[0055] The first transmission end A includes a device or a component connected to a connection port at one end of the transmission circuit. In some embodiments, the first transmission end A is connected to the power source so that the first transmission end A may obtain electrical power from the power source and transmit the electrical power to other components of the slip ring device (e.g., the second transmission end B, the load, etc. ) via power line of the transmission circuit.
[0056] The second transmission end B includes a device or a component that is connected to a connection port at the other end of the transmission circuit. In some embodiments, the second transmission end B is connected to the load, i.e., the second transmission end B may transmit the electrical power from the transmission circuit to the load.
[0057] In some embodiments, the first transmission end A and the second transmission end B may include or connect functional components or structures in the medical scanning device. For example, the first transmission end A and the second transmission end B may include or connect a stator structure and a rotor structure, respectively, in a CT scanning device. The slip ring transmission module 210 may be used to enable data and power transmission between a stator and a rotor in the CT scanning device.
[0058] In some embodiments, the load refers to a device, a component, or a system that needs to be operated by a supply of electrical power. For example, in the case of the CT scanning device, the load may include a tube and a high voltage system in the CT scanning device, a plurality of switching power sources, a heat dissipation module, or the like.
[0059] It should be noted that the present disclosure does not limit the names and functions of the first transmission end A and the second transmission end B. For example, the names and / or the functions of the first transmission end A and the second transmission end B may be exchanged, i.e., the second transmission end B may be connected to the power source, and the first transmission end A may be connected to the load.
[0060] The at least two power line communication modules 220 are configured to adjust the frequency of data signals so that the data signals may be transmitted in the transmission circuit.
[0061] A power line carrier module refers to a device or a component for transmitting data signals over the transmission circuit. The power line communication module is configured based on a power line carrier (PLC) technique. The PLC technique utilizes power line as carriers to enable high-speed transmission of analog signals or digital signals through a carrier mode, which is widely used in electrical power systems due to the advantages of long communication distance, low cost, high reliability, and isochronous.
[0062] In some embodiments, the power line communication modules 220 are provided at the first transmission end A and the second transmission end B, respectively. That is, each of the first transmission end A and the second transmission end B is provided with a power line communication module. For example, the first transmission end A is connected to a first power line communication module, and the second transmission end B is connected to a second power line communication module. Structures of the first power line communication module and the second power line communication module may be the same or different, as long as they are sufficient to realize corresponding functions, which are not limited in the present embodiment.
[0063] Data signals may include medical image data signals or control data signals. The medical image data signals may include image data obtained by an imaging device (e.g., an X-ray tube and a detector, etc. ) performing a medical scan (e.g., a CT scan) . The control data signals may include one or more motion parameters reflecting various components of the medical scanning device, control instructions of various components of the medical scanning device, or the like. The control data signals reflect the current operating status of the image acquisition module to a console of a control module, such as a stage of the radiation emitting of the tube 111 (e.g., starting radiation emitting, in the middle of radiation emitting, or finishing radiation emitting) . In some embodiments, the data signals and electrical power are transmitted through a same of the at least one transmission circuit.
[0064] Adjusting the frequency of the data signals means processing the data signals to change the magnitude of the frequency of the data signals. For example, the power line communication modules 220 may modulate the data signals to adjust the data signals from a low frequency to a high frequency. By modulating communication data signals into a high frequency band (e.g., 1MHz~100MHz, or higher) and loading the high frequency signal onto the transmission circuit that has an electrical frequency of 50 / 60Hz, the signal frequency and the electrical frequency are completely isolated from each other and do not interfere with each other. The amplitude of the data signals is smaller than the amplitude of the electrical power (e.g., the amplitude of the data signals is 5V, while the amplitude of the electrical power is 220V or 400V) , so the data signals may not affect the normal operation of electrical equipment. In such a case, data communication between the first transmission end A and the second transmission end B only uses the transmission circuit (a power rail) without the need for other transmission media, reducing the complexity and cost of the system.
[0065] More descriptions regarding the powerline carrier module and data transmission may be found in FIGs. 14 and 15, and related descriptions thereof.
[0066] In this embodiment, power transmission inside the medical scanning device is realized by the transmission circuit of the slip ring transmission module, and the frequency of the data signals is adjusted by the power line communication module, so that the data signals may be transmitted in the transmission circuit without affecting the normal operation of the electrical equipment, which simplifies the structure of the slip ring device and reduces the complexity and cost of system design under the premise of ensuring power and data signal transmission.
[0067] FIG. 3 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure. As shown in FIG. 3, the slip ring device 300 (which may also be a slip ring transmission module 210) may include a slip ring disk 310 and a conductive assembly 320. The conductive assembly 320 includes a first component and a second component.
[0068] The slip ring disk 310 and the conductive assembly 320 are disposed at the first transmission end A and the second transmission end B, respectively. For example, the slip ring disk 310 is provided at the first transmission end A, and the conductive assembly 320 is provided at the second transmission end B; or, the conductive assembly 320 is provided at the first transmission end and the slip ring disk 310 is provided at the second transmission end A.
[0069] In some embodiments, the first transmission end A includes a rotating structure of the medical scanning device (e.g., the rotating portion 122 in FIG. 1) , and the second transmission end B includes a fixed structure of the medical scanning device (e.g., the fixed portion 121 in FIG. 1) . When the slip ring disk 310 is provided at the first transmission end A and the conductive assembly 320 is provided at the second transmission end B, the slip ring disk and the conductive assembly are in sliding contact, and the slip ring disk is able to rotate relative to the conductive assembly, which enable transmission of electrical power anddata signals between the rotating structure 122 and the fixed structure 121. The sliding contact refers to a process of the slip ring disk and the surface of the conductive assembly contacting and sliding during a relative motion.
[0070] In some embodiments, the slip ring disk 310 includes at least one slideway 311, and one of the at last one slideway 311 may be provided with at least one blocking portion 312. A slideway refers to a metal track formed on the surface of the slip ring disk. A blocking portion refers to a structure or a component provided to partition a track on the slideway.
[0071] The blocking portion 312 may be configured to block the transmission of the electrical power and the data signals on two sides of the slideway of the blocking portion 312 to create a plurality of transmission paths by blocking the transmission circuit. In some embodiments, the blocking portion 312 on a slideway 311 may include an insulating layer, a groove and / or a notch provided on the slideway 311. An insulating material (e.g., plastic, rubber, etc. ) encases a part of a region of the slideway 311 to form the blocking portion 312, or a part of the region of the slideway 311 is provided with the notch to form the blocking portion 312. When the conductive assembly 320 is moved to the blocking portion 312, the transmission circuit is isolated under the influence of the blocking portion 312, i.e., electrical isolation is formed. For example, in the slip ring device 300 of FIG. 3, when the conductive assembly 320 is located outside the dashed dots, i.e., when an electric brush or a carbon brush is moved outside the blocking portion, there is only one transmission path (i.e., one-quarter of a circle circumference of an upper left side of the slideway in FIG. 3) for the transmission of the electrical power and the transmission of the date signals between the conductive assembly 320 and a connection port 330, and other transmission paths are blocked by the blocking portion 312. When the electric brush or the carbon brush is at the dashed dots, i.e., the electric brush or the carbon brush is moved to be at the blocking portion, there may be two transmission paths (i.e., two half-circumferences of the slideway) . In some embodiments, when the connection port 330 is located at the center of a length of the slideway, the electric brush or the carbon brush is at the dashed dots, and the transmission of the electrical power and the transmission of the date signal are two transmission paths of equal length, which leads to the best transmission effect.
[0072] In some embodiments, the conductive assembly 320 includes at least one first component and at least one second components corresponding to the at least one first component. The at least one first component may correspond to one or more second component, and the first component and the second component in combination are capable of realizing corresponding functions of the conductive assembly. For example, the at least one first component includes a carbon brush disc, and the at least one second component includes carbon brushes, and the carbon brush disc may have one or more carbon brushes and form a collection of a contact point with the slideway 311. The slip ring disk 310 slides in contact with the carbon brush disc through the carbon brushes, the rotating structure includes a first power carrier module 340, and the first power carrier module 340 is connected to the slip ring disk 310 or the carbon brush disc provided on the rotating structure via the connection port 330. The fixed structure includes a second power carrier module 350, and the second power carrier module 350 is connected to the carbon brush disc or the slip ring disk provided on the fixed structure via the connection port 330. The first power carrier module 340 is in communication with the second power carrier module 350 by sliding contact between the slip ring disk 310 and the conductive assembly 320. As another example, the at least one first component includes an electric brush disc and the at least one second component includes electric brushes, and the electric brush disc may have one or more electric brushes and form a collection of a contact point with the slideway 311. The slip ring disk 310 slides in contact with the electric brush disc, the rotating structure includes a first power carrier module 340, and the first power carrier module 340 is connected to the slip ring disk 310 or the electric brush disc provided on the rotating structure via the connection port 330. The fixed structure includes a second power carrier module 350, and the second power carrier module 350 is connected to the electric brush disc or the slip ring disk 310 provided on the fixed structure via the connection port 330. The first power carrier module 340 is in communication with the second power carrier module 350 by sliding contact between the slip ring disk 310 and the conductive assembly 320.
[0073] Referring to FIG. 22, FIG. 22 is a diagram illustrating an exemplary slip ring disk and an exemplary conductive assembly according to some embodiments of the present disclosure. The surface of the slip ring disk 310 may be provided with the slideway 311, which may be a metal track. The conductive component 320 is in sliding contact with the slideway 311, and the conductive component 320 includes a first component 321 and a second component 322. In some embodiments, the first component 321 includes a carbon brush disc, and the second component 322 includes carbon brushes. In some embodiments, the first component 321 includes an electric brush disc and the second component 322 includes electric brushes.
[0074] It should be noted that FIG. 22 is for illustrative purposes only and is not intended to limit a count of the first component 321 and the second component 322 in the drawing. For example, there may be a plurality of first components 321 and uniformly or non-uniformly provided at intervals on the slideway 311. As another example, each of the plurality of first components 321 may include one or more second components 322.
[0075] In some embodiments, the slip ring disk and the conductive assembly may be in non-direct contact, e.g., it may be indirect or non-contact.
[0076] FIG. 4 is a schematic diagram illustrating an exemplary slip ring device for a medical scanning device according to some embodiments of the present disclosure. As shown in FIG. 4, the medical scanning device 400 may be divided into a stator side 410 (the first transmission end) and a rotor side 420 (the second transmission end) . The stator side 410 includes an image reconstruction unit 411, a first control and data conversion circuit 412, a primary communication circuit 413, a first coupling circuit 414, a first resonance compensation circuit 415, a primary electrical power conversion 416, and a power source 417. A rotor side 420 includes a data acquisition unit 421, a second control and data conversion circuit 422, a secondary communication circuit 423, a second coupling circuit 424, a second resonance compensation circuit 425, a secondary electrical power conversion 426, and a load 427. A non-contact circuit 430 is used in the slip ring device between the stator side 410 and the rotor side 420.
[0077] In some embodiments, the non-contact circuit 430 may be implemented by radio waves, fiber optic communication, electromagnetic field inductive coupling, magnetic resonance coupling, or the like. This embodiment does not limit the specific indirect contact manner, as long as it is sufficient to realize the transmission of electrical power and data signals between the slip ring disk and the conductive assembly.
[0078] In conjunction with FIG. 4, an example of the transmission of the electrical power and the data signals between the stator side 410 and the rotor side 420 via the non-contact circuit 430 is provided. For example, after the electrical power is provided by the power source 417, the voltage and current of the electrical power are transformed via the primary electrical power conversion 416, and the ineffective power loss due to capacitance and inductance is reduced via the first resonance compensation circuit 415. Then, the electrical power is transmitted via the first coupling circuit 414 to the second coupling circuit 424 after passing through the first coupling circuit 414. After that, the ineffective power loss is reduced through the second resonance compensation circuit 425, and then the voltage and current of the electrical power are transformed. Ultimately, the electrical power is finally input to the load 427, thereby realizing the transmission of the electrical power through the non-contact circuit 430.
[0079] As another example, after the data acquisition unit 421 obtains the data signals by scanning, and the data is processed through the second control and data conversion circuit 422 on the rotor side. Under the data protection and control of the secondary communication circuit 423, the data signals are finally transmitted via the non-contact circuit 430 to the first coupling circuit 414 on the stator side after passing through the second coupling circuit 424 on the rotor side. Then, after passing the primary communication circuit 413 and the first control and data conversion circuit 412 on the stator side, the data signals are finally transmitted to the image reconstruction unit 411 for subsequent image reconstruction.
[0080] In the present embodiment, the transmission of the electrical power and the data signals is realized using a non-contact manner, which may make the circuit design of the medical scanning device more flexible, and may simplify the design of the system to a certain extent.
[0081] FIG. 5 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure.
[0082] As shown in FIG. 5, in some embodiments, the slip ring device 500 includes a rotating assembly 510 (rotating portion 122) and a fixed assembly 520 rotatably contacting the rotating assembly. The rotating assembly 510 is a frame having an opening in the center and an outer peripheral shape of a cylinder, the opening is a space for an object to enter during shooting, and the fixed assembly 520 may be provided on the outside of the rotating assembly 510.
[0083] The rotating assembly 510 includes a slideway 511 and a load 512. For example, the load 512 includes a tube 5121, a detector 5122, etc. The fixed assembly 520 is provided with a power source 521 and a conductive assembly 522 in contact with the slideway 510. The power source 521 is connected to the conductive assembly 522, the conductive assembly 522 is connected with the slideway, and the load 512 is connected to the slideway 511 through a connection port 530 connecting a slip ring lead line and the slideway to enable the power source 521 to provide electrical power to the load 512 of the rotating assembly 510.
[0084] The rotating assembly 510 includes a first power line communication module 540, and the first power line communication module 540 is connected to the slideway 510 provided on the rotating assembly. The fixing assembly 520 includes a second power line communication module 550, and the second power line communication module 550 is connected to an electric brush disc or a carbon brush disc provided on the fixed assembly 520. The first power line communication module 540 is in communication with the second power line communication module 550 through sliding contact between the slideway and the electric brush disc or the carbon brush disc. A data acquisition module 560 provided on the rotating assembly 510 and a control and data reconstruction module 570 provided on the fixed assembly 520 may control signals and transmit data via a communication link between the first power line communication module 540 and the second power line communication module 550.
[0085] In this embodiment, the width of the blocking portion 513 along the circumference of the slideway is less than the width of an electric brush or carbon brush along the circumference of the slideway. For example, if the width of the blocking portion 513 along the circumference of the slideway is greater than the width of the electric brush or carbon brush along the circumference of the slideway, the electric brush or carbon brush is only connected to the blocking portion when the electric brush or carbon brush moves to arrive at the blocking portion with the rotation of the slideway. The blocking portion blocks the transmission of electrical power and data signals, causing the rotating assembly to be unable to transmit the electrical power and the data signals simultaneously with the fixed assembly via the sliding contact between the slideway and the electric brush or carbon brush.
[0086] In some embodiments, the blocking portion 513 is formed by providing an insulating layer or a notch in the slideway. In some embodiments, the insulating layer is filled in a cross-section of the slideway, and an overall smoothness of the slideway is maintained to allow the electric brush and carbon brush to contact and slide with the same state on the surface of the slideway.
[0087] FIG. 6 is a diagram illustrating an exemplary non-segmented slip ring device according to some embodiments of the present disclosure.
[0088] As shown in FIG. 6, in the slip ring device 600, the first power line communication module 640 of the rotating assembly is connected to the slideway 611 through the connection port 630, and the second power line communication module 650 of the fixed assembly is in contact connection with the slideway 611 through the conductive assembly 620. The transmission of electrical power or communication between the conductive assembly 620 and the connection port 630 is realized by a plurality of transmission paths with unequal lengths. A multipath effect refers to a fact that due to a path difference between different transmission paths, when data signals are transmitted along the different transmission paths, the time when the data signals reach a receiving side is different, resulting in a significant decrease in the transmission rate in this state.
[0089] As shown in FIG. 3, in the slip ring device of the present embodiment, when the conductive assembly 320 is located outside the dotted circle, i.e., when the electric brush or the carbon brush moves outside the blocking portion, there is only one transmission path for the transmission of electrical power and the transmission of data signals of the conductive assembly 320 and the connection port 330, and other transmission paths are blocked by the blocking portion. Whereas there are only two transmission paths when the electric brush or the carbon brush is at the dotted circle, i.e., when the electric brush / carbon brush moves to the blocking portion. In some embodiments, when the connection port 330 is located at the center of a length of the slideway, and the electric brush or the carbon brush is at the dashed dot, the transmission of the electrical power and the transmission of the data signals may have two transmission paths of equal length, which leads to an improved transmission effect.
[0090] FIG. 7 is a diagram illustrating an exemplary segmented slip ring device according to some embodiments of the present disclosure.
[0091] As shown in the slip ring device 700 of FIG. 7, in some embodiments, a slideway 711 includes at least two blocking portions 712, and the at least two blocking portions 712 block the slideway 711 into at least two segments. The at least two segments of the slideway are insulated from each other.
[0092] In some embodiments, the first power line communication module 740 provided at the first transmission end (e.g., the rotating assembly) is connected to a predetermined position of each of the at least two segments of the slideway provided at the first transmission end via a connecting line, and lengths of connecting lines connecting the at least two segments of the slideway and the first power line communication module may be the same. The predetermined position of a segment of the slideway may be one-third of the segment of the slideway, two-thirds of the segment of the slideway, one-quarter 730 of the segment of the slideway, or a random position of the segment of the slideway, or the like.
[0093] In some embodiments, the at least two blocking portions 712 may be symmetrically disposed on the slideway 711 to make the at least two segments of the slideway of equal length. The first power line communication module 740 of the first transmission end is connected to a middle region of one of the at least two segments of the slideway provided on the first transmission end by a connecting line, and lengths of connecting lines connecting the at least two segments of the slideway and the first power line communication module may be the same. The second power line communication module 750 of the second transmission end is connected to the conductive assembly 720 via one connecting line.
[0094] In some embodiments, the first power line communication module 740 of the first transmission end may be connected to the middle region or other positions of one of the at least two segments of the slideway provided on the first transmission end by a connecting line, and lengths of connecting lines connecting the at least two segments of the slideway and the first power line communication module may be different. The second power line communication module 750 of the second transmission end may be connected to the conductive assembly 720 via one or more connecting lines.
[0095] In this embodiment, by dividing the slideway into at least two segments, it may be ensured that transmission paths of the data are of equal length in each transmission path, and the reduction of transmission rate due to the multipath effect may be better avoided.
[0096] FIG. 8 is a diagram illustrating an exemplary segmented slip ring device according to some embodiments of the present disclosure.
[0097] As shown in the slip ring device 800 of FIG. 8, in some embodiments, a second power line communication module 850 provided at a second transmission end (e.g., a fixed assembly) is connected to second components corresponding to at least two first components provided at the first transmission end via at least two connecting lines. The first components are arranged at equal distances along the circumference of the slip ring disk.
[0098] For example, the first power line communication module 840 of the rotating assembly is connected to a connection port 830 via at least two connection lines. The second power line communication module 850 of the fixed assembly is connected to carbon brushes of at least two carbon brush discs or electric brushes of at least two electric brush discs provided on the fixed assembly via at least two connection lines. The carbon brush discs or electric brush discs are arranged at equal distances along the circumference of the slip ring disk. When the conductive assembly 820 is located outside the dashed dots, i.e., the electric brushes or the carbon brushes move outside the blocking portion 812, there are two transmission paths for the transmission of the electrical power and the transmission of data signals of the conductive assembly 820 and the connection port 830, and other transmission paths are blocked by the blocking portion. There are four transmission paths when the electric brushes or the carbon brushes are at the dashed dots, i.e., when the electric brushes or the carbon brushes move to arrive at the blocking portion 812. In some embodiments, when the connection port 830 is located at the center of the length of each of the at least two segments of the slideway 811, with the electric brushes or the carbon brushes at the dashed dot, the transmission of the electrical power and the transmission of the data signals has four transmission paths of equal length, which leads to a better transmission effect. In some embodiments, the first components may be arranged at unequal distances along the circumference of the slip ring disk.
[0099] FIG. 9 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure.
[0100] As shown in the slip ring device 900 of FIG. 9, the slip ring device 900 in this embodiment is provided with four conductive assemblies 920, and one connection port 930 connecting the slip ring lead line and the slideway 911. The conductive assemblies 920 are connected to the second power line communication module 950 and the connection port 930 is connected to the first power line communication module 940. The multipath effect of the transmission of the electrical power and the transmission of the data signals of the conductive assembly 920 and the connection port 930 remains, but a variation period of the transmission path is reduced to a quarter. With a blocking portion or a plurality of connecting lines, a count of the transmission path formed on the sliding ring disk may change with a relative rotation between the sliding ring disk and the conductive assembly. The variation period of the transmission path refers to a period of change in the count of the transmission path. For example, from a starting position, the count of the transmission path changes after one cycle of rotation, and the variation period of the transmission path may be changed after half a cycle of rotation with the setting of the blocking portion. The more conductive assemblies 920 there are, the lower the impact of the multipath effect, and when there are n conductive assemblies and n tends to infinity, there is approximately one transmission path between the stator side and the rotor side.
[0101] Increasing the count of conductive assemblies (e.g., increasing the count of connecting lines) may reduce the multipath effect present on each slideway of the slip ring disk. In conjunction with FIG. 10, the variation period and a variation magnitude of influencing factors (the transmission path) of the multipath effect are illustrated. FIG. 10 is a schematic diagram illustrating a variation period and a variation magnitude of influencing factors (transmission paths) of an existing multipath effect.
[0102] In some embodiments, when the slip ring disk includes at least one slideway, the conductive assembly may be electrically connected to the at least one slideway via at least two connecting lines. In some embodiments, the at least two connecting lines may have the same length or may have different lengths.
[0103] In some embodiments, a distance between each of the at least two connecting lines and the at least one slideway may be the same
[0104] The slideway in FIG. 10 has two transmission paths L1 and L2, and FIG. 10 shows changes of lengths of the two transmission paths and a difference between the two lengths with the rotation angle. FIG. 11 is a schematic diagram illustrating a variation period and a variation magnitude of influencing factors (transmission paths) of a multipath effect of a slip ring device according to some embodiments of the present disclosure. The slideway in FIG. 11 has two transmission paths L1 and L2, and FIG. 11 shows changes of lengths of the two transmission paths and a difference between the two lengths with the rotation angle. Comparing FIG. 10 and FIG. 11, it may be seen that under a condition of only 1 time increased conductive assemblies, the conductive assemblies take a distributed design, and the variation period of the transmission path on the slideway is shortened by half and the variation amplitude is reduced by half. Therefore, the influence of the multipath effect is weakened accordingly. Similarly, it is possible to learn the effect of increasing the count of connection ports connecting the slip ring lead line and the slideway on reducing the variation period the variation magnitude of the influencing factors of the multipath effect on each slideway, and the effect of increasing a count of the conductive assemblies and the count of connection ports connecting the slip ring lead line and the slideway on reducing the variation period and the variation magnitude of the influencing factors of the multipath effect.
[0105] FIG. 12 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure.
[0106] In some embodiments, at least two connection ports 1230 are provided on a slideway of a slip ring disk, and the at least two connection ports 1230 connect a slip ring lead line and a slideway 1211. The slip ring lead line is connected with a power line communication module. The slideway 1211 may transmit the electrical power and the data signals, simultaneously. In such a case, a variation period and a variation magnitude of an influencing factor of a multipath effect may be reduced. At least two connection ports 1230 on the slideway 1211 of the slip ring disk are equally spaced apart. The at least two connection ports 1230 provided with the slideway 1211 may be connected to the first power line communication module 1240 of the rotating assembly via the at least two slide ring lead lines, respectively. The at least two slide ring lead lines on the slideway 1211 are equally spaced apart, and the second power line communication module 1250 is connected to the conductive assembly 1220. The slip ring device 1200 in this embodiment is provided with one conductive assembly 1220 and four connection ports 1230, and the multipath effect of the transmission of electrical power and the transmission of the data signals of the conductive assembly 1220 and connection ports 1230 remains, but the variation period of the transmission path is shortened to 1 / 4. The more connection ports 1230 connecting the slip ring lead lines and the slideway 1211, the lower the influence of the multipath effect, and the more the multipath effect is reduced when there are n connection ports 1230 connecting the slip ring lead lines and the slideway 1211 and n tends to infinity, there is approximately one transmission path between the stator side and the rotor side.
[0107] FIG. 13 is a diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure.
[0108] As shown in a slip ring device 1300 of FIG. 13, in some embodiments, both a count of conductive assemblies and a count of connection ports connecting the slip ring lead lines and the slideway 1311 are increased to reduce the variation period and variation magnitude of the influencing factor of the multipath effect. As shown in FIG. 13, the slip ring device 1300 in this embodiment is provided with four conductive assemblies 1320 and four connection ports 1330, the four conductive assemblies 1320 are connected to the second power line communication module 1350, and the four connection ports 1330 are connected to the first power line communication module 1340. The multipath effect of the transmission of the electrical power and the transmission of the data signals of the conductive assemblies 1320 and the connection ports 1330 is still present, but the variation period of the influencing factors of the multipath effect is reduced to 1 / 16. The more the conductive assemblies and the connection ports connecting the slip ring lead lines and the slideway 1311, the lower the influence of the multipath effect. When there are n conductive assemblies and n connection ports connecting the slip ring lead lines and the slideway and n tends to infinity, there is approximately one transmission path between the stator side and the rotor side.
[0109] The slip ring device 1300 provided in this embodiment reduces the variation period and the variation magnitude of the influencing factors (transmission paths) of the multipath effect present on the slideway1311 by adding a plurality of conductive assemblies 1320 or connection ports 1330 connecting the slip ring lead lines and the slideway 1311, and the conductive assemblies 1320 or the connection ports 1330 connecting the slip ring lead lines and the slideway 1311 are designed to be distributed at equal intervals, reducing the influence of the multipath effect on the power line carrier signal as transmitted over the slideway 1311.
[0110] FIG. 14 is a schematic diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure.
[0111] As shown in the slip ring device 1400 of FIG. 14, in some embodiments, the first transmission end A includes a control module 1450, the second transmission end B includes an image acquisition module 1410, and the power line communication module 1420 is configured to adjust a frequency of control data signals so that the control data signals may be bi-directionally transmitted between the master control module and the image acquisition module via the transmission circuit.
[0112] The control module 1450 refers to the main control module for processing medical image data signals in a medical imaging system.
[0113] The image acquisition module 1410 refers to a module that performs image data acquisition in the medical imaging system.
[0114] In some embodiments, the data signals are transmitted via a transmission circuit from the second transmission end B to the control module 1450 located at the first transmission end A. The control module 1450 includes at least one of a console 1451 or an image reconstruction unit 1452. If the data signals include the medical image data signals, a tube and a detector in the image acquisition module 1410 work in conjunction to provide medical image data signals of a scanning object. The frequency of the medical image data signals are adjusted by the power line communication module 1420 located at the second transmission end B so that the medical image data signals are transmitted to the transmission circuit. Subsequently, the frequency of the medical image data signals are adjusted by the power line communication module 1420 located at the first transmission end A, so that the medical image data signals may be transmitted to the image reconstruction unit 1452 of the control module 1450, and thus a medical image is reconstructed according to a reconstruction algorithm. It is understood that the transmission of the medical image data signals here is unidirectional, i.e., the image acquisition module 1410 transmits the medical image data signals to the image reconstruction unit 1452 in one direction via the transmission circuit of a slip ring transmission module 1440. In this way, by using the PLC technique to process the medical image signal data, the processed medical image signal data may be transmitted through the transmission circuit, eliminating the need to allocate an independent transmission circuit for the transmission of the medical image signal data. Therefore, the circuit design of the slip ring for transmitting the medical image data signals may be simplified or eliminated, the structural design of the slip ring may also be simplified, and design costs may be reduced.
[0115] In some embodiments, the data signals also include control data signals, such that the control data signals provided by the image acquisition module 1410 may be transmitted to the console 1451 of the control module 1450 via a transmission circuit of a slip ring transmission channel. The control data signals provided by the image acquisition module 1410 may reflect the current operating status of the image acquisition module 1410 to the console 1451, such as the stage of a radiation emission of the tube (beginning the radiation emission, during the process of the radiation emission, or completed the radiation emission) .
[0116] In some embodiments, the control data signals may be bi-directionally transmitted between the image acquisition module 1410 and the console 1451 via the transmission circuit of the slip ring transmission channel. Specifically, after the power line communication module 1420 adjusts the frequency of the control data signals, the control data signals may realize bi-directional communication between the control module 1450 and the image acquisition module 1410 located on the second transmission end B via the transmission circuit. The control data signals provided by the console 1451 is configured to control the operating status of the image acquisition module 1410, such as controlling the time when the tube starts the radiation emission and interrupts the radiation emission, adjusting a dosage parameter of the radiation emission, controlling the time when the image acquisition module 1410 transmits the medical image data signals to the outside, etc. In this way, the transmission circuit also transmits the control data signals without providing an additional transmission circuit for the control data signals, simplifying the design.
[0117] FIG. 15 is a schematic diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure.
[0118] As shown in a slip ring device 1500 of FIG. 15, in some embodiments, a slip ring transmission module 1540 includes at least two transmission circuits. Taking two transmission circuits as an example, one transmission circuit may be configured to transmit electrical power, and another transmission circuit is configured to transmitmedical image data signals rcontrol data signals.
[0119] Exemplarily, the slip ring device includes two transmission circuits, one transmission circuit is indicated by a bolded dashed line for transmitting the electrical power from a power source 1570, and the other transmission circuit is indicated by a bolded solid line for transmitting the data signals such as the medical image signal data, or the control data signals, or the medical image data signals and the control data signals. Certainly, the present embodiment may also assign three independent transmission circuits for transmitting the electrical power, the medical image data signals, and the control data signals, respectively. In some embodiments, the same transmission circuit may synchronously transmit at least two of the electrical power, the medical image data signals, and the control data signals.
[0120] In some embodiments, a power line communication module 1520 includes a modulator 1521, and the modulator 1521 is configured to receive and modulate data signals to obtain modulated data signals with a changed frequency. The power line communication module 1520 also includes a demodulator 1523, and the demodulator 1523 is configured to receive and demodulate the modulated data signals to obtain demodulated data signals with the same frequency as the demodulated data signals. In this way, a unidirectional transmission of the data signals from the second transmission end B of the transmission circuit to the first transmission end A may be realized. In some embodiments, a power line communication module is provided at each of the second transmission end B and the first transmission end A, and the power line communication module includes the modulator 1521 and the demodulator 1523, realizing bi-directional communication of the control data signals.
[0121] In some embodiments, the power line communication module 1520 further includes at least a power amplification circuit 1522. The power amplification circuit 1522 is configured to amplify the data signals modulated by the modulator 1521 and transmit the amplified data signals to the power line communication module 1520 at the first transmission end A via the transmission circuit.
[0122] In some embodiments, the power line communication module 1520 further includes at least a filtering circuit 1524, the filtering circuit 1524 is configured to filter the data signals and transmit the data signals to the demodulator 1523, so that a high frequency portion and a low frequency portion in the data signals may be filtered. In some embodiments, the power line communication module 1520 may include a first power line communication module and a second power line communication module. For example, the first power line communication module and the second power line communication module may have the same structure. In some embodiments, the power line communication module 1520 may include a first power line communication module and a second power line communication module. For example, the first power line communication module and the second power line communication module may have the same structure.
[0123] In some embodiments, at least one transmission circuit synchronously transmits at least two of the electrical power, the medical image data signals, and the control data signals.
[0124] Understandably, to realize the bidirectional communication of the control data signals, the power line communication module 1520 at the second transmission end B and the power line communication module 1520 at the first transmission end A are both configured with a power amplification circuit 1522 and a filtering circuit 1524.
[0125] In some embodiments, the power line communication module 1520 further includes a protection unit 1525. The protection unit 1525 is configured to receive data signals modulated by said modulator 1521, convert the data signals into a high voltage signal, and transmit the high voltage signal to the transmission circuit. Alternatively, the protection unit 1525 is configured to receive the high voltage signal converted from the data signals, convert the high voltage signal into a low voltage signal, and transmit the low voltage signal to the demodulator 1523. In some embodiments, the protection unit 1525 is a transformer or a coupling circuit.
[0126] FIG. 16 is a schematic diagram illustrating an exemplary slip ring device according to some embodiments of the present disclosure.
[0127] As shown in FIG. 16, in some embodiments, the slip ring device 1600 further includes a signal anti-interference module and the signal anti-interference module may be provided on a transmission circuit of a slip ring transmission module 1640. The signal anti-interference module includes at least one of an electromagnetic shielding unit, a signal isolation unit 16111, or a filtering unit 16113. In the process of transmitting the data signals based on a power line communication (PLC) technique on a slip ring, the transmission circuit is susceptible to interference from the electromagnetic environment, leading to bit errors and packet losses during the transmission of the data signals, which results in an unstable signal transmission rate and a lower transmission rate. In addition, the transmission circuit is connected to a plurality of loads 1660, and in the CT system, the loads 1660 may be the tube and the high voltage system in the CT, as well as a plurality of switching power supplies, heat dissipation modules, etc. These loads 1660 have different noise characteristics, and the noise is also transmitted to the transmission circuit, thereby exacerbating the interference during the transmission of the data signals. Furthermore, a power supply side of the CT (e.g., a power source 1670) introduces various noises on the power grid that are further transmitted to the transmission circuit, also affecting the transmission of the data signals. The signal anti-interference module is provided in the present embodiment, which may remove or reduce an interfering signal on the transmission circuit, such as removing an electromagnetic interference signal and a power grid noise, to avoid as much as possible the influence of external interfering signals on the data signals during transmission, improve the transmission rate of the data signals, and improve the stability of the transmission of the data signals.
[0128] In some embodiments, when the signal anti-interference module includes an electromagnetic shielding unit, the electromagnetic shielding unit may include a shielded electrically conductive layer (a metal conductive layer) wrapping the transmission circuit. The bolded line in FIG. 16 indicates the transmission circuit, the shielded electrically conductive layer is provided on the transmission circuit, and the electromagnetic shielding unit may shield the electromagnetic interference signal. In some embodiments, the signal anti-interference module further includes at least one grounding unit 16112, and the electromagnetic shielding unit connects to the at least one grounding unit 16112 to ground the interfering signal. For example, a grounding unit may be connected to an electromagnetic shielding unit at a location where the electromagnetic shielding unit is disposed at the first transmission end A, and a grounding unit may be located at a location where the second transmission end B is disposed at the second transmission end B.
[0129] In some embodiments, when the signal anti-interference module includes a signal isolation unit 16111, each of the first transmission end A and the second transmission end B is provided with the signal isolation unit 16111, and the first transmission end A is connected to the power source 1670 via the signal isolation unit 16111, and the second transmission end B is connected to the load 1660 through the signal isolation unit 16111. The signal isolation unit 16111 of the first transmission end A isolates the voltage provided by the power source 1670, outputs an isolated voltage and then transmits it to the second transmission end B through the transmission circuit of the slip ring transmission module 1640. The signal isolation unit 16111 of the second transmission end B isolates the previously isolated voltage again, outputs another isolated voltage, and provides it to the load 1660, so that the interfering signal may be isolated. The signal isolation unit 16111 includes at least one of an isolation transformer, an AC-DC circuit, and a DC-AC circuit.
[0130] When the signal anti-interference module includes the filtering unit 16113, each of the power line communication module 1620 located at the first transmission end A, and the power line communication module 1620 located at the second transmission end B is connected with the filtering unit 16113. The filtering unit 16113 located at the first transmission end A is provided in the rotating portion of the scanner gantry, and the filtering unit 16113 located at the second transmission end B is provided in the fixed portion of the scanner gantry. The filtering unit 16113 filters out a high frequency portion and a low frequency portion of data signals. In some embodiments, the filtering unit 16113 includes one or a combination of a filtering inductor and a filtering capacitor.
[0131] In some embodiments, the power line communication module further includes a channel calibration module. The channel calibration module may be a functional module arranged in the power line communication module, and the specific implementation of this functional module is not limited in this embodiment. Because the slip ring disk and the conductive assembly are in mutual motion during the operation of the medical scanning device, resulting in a multipath effect of real-time dynamic changes when the data signals exchange data between the stator and the rotor through the slip ring disk and the conductive assembly. The multipath effect of real-time dynamic changes may lead to a problem with delays in the modulator and demodulator of the data signals during channel estimation and bit loading. Therefore, channel calibration is performed through the channel calibration module to overcome the above problems. In some embodiments, the channel calibration module is configured to obtain channel data for data communication of the data signals between the first transmission end and the second transmission end when the slip ring disk and the conductive assembly are in relative rotation. More detailed descriptions regarding the channel calibration may be found in FIG. 19 and its related descriptions.
[0132] The channel data refers to data obtained when the channel calibration module performs calibration. Merely by way of example, the channel data includes a strength, a frequency, a phase, and / or a noise level (e.g., a signal-to-noise ratio) of the data signals.
[0133] In some embodiments, the channel calibration module is further configured to generate a communication calibration table based on the channel data, and the communication calibration table is configured to encode, decode, tune, and demodulate the data signals by the modulator and the demodulator.
[0134] The communication calibration table refers to a reference used to guide the modulator and the demodulator on how to encode, decode, tune, and / or demodulate communication data.
[0135] In some embodiments, the communication calibration table includes a bit loading table corresponding to each communication frequency point at different moments (e.g., a CT slip ring rotation cycle) . The modulator and the demodulator may refer to the communication calibration table before processing the data signals, which in turn determines an optimal modulation / demodulation parameter. More descriptions regarding obtaining and using the communication calibration table may be found in FIG. 19 and its related descriptions.
[0136] The present embodiment provides the channel calibration module for the slip ring device, and by performing the channel calibration, it is possible to make the data signals transmitted under different environments and conditions and to obtain a stable data transmission quality.
[0137] FIG. 17 and 18 are schematic diagrams illustrating an exemplary power line communication device according to some embodiments of the present disclosure.
[0138] As shown in FIGs. 17 and 18, this embodiment provides a power line communication device applied to a medical imaging system, and the power line communication device includes a slip ring transmission module 1740 (or a slip ring transmission module 1840) , a power line communication module 1720 (or a power line communication module 1820) , and a signal anti-interference module 1730 (or a signal anti-interference module 1830) . It is to be noted that the power line communication device of the present embodiment may be applied not only to the CT system but also to other medical imaging systems that are powered by a slip ring, such as an RT radiotherapy system.
[0139] In some embodiments, the signal anti-interference module 1730 is provided on a transmission circuit for removing or reducing an interfering signal on the transmission circuit, for example, removing an electromagnetic interference signal and a power grid noise, to try to avoid external interfering signals from affecting the data signals in the transmission process, which improves the transmission rate of the data signals and improves the transmission stability of the data signals. The signal anti-interference module 1730 includes at least one of an electromagnetic shielding unit, a signal isolation unit 1731 (or a signal isolation unit 1831) , or a filtering unit 1833.
[0140] When the signal anti-interference module 1730 includes the electromagnetic shielding unit, the electromagnetic shielding unit may include a shielded electrically conductive layer (a metal conductive layer) wrapping the transmission circuit, and the bolded lines in FIGs. 17 and 18 indicate that the shielded electrically conductive layer is provided on the transmission circuit, and the electromagnetic shielding unit shields the electromagnetic interference signal.
[0141] When the signal anti-interference module 1730 includes the signal isolation unit 1731, each of the first transmission end A and the second transmission end B is provided with the signal isolation unit 1731. Specifically, the first transmission end A is connected to a power source 1770 (or a power source 1870) via the signal isolation unit 1731, and the second transmission end B is connected to a load 1760 (or a load 1860) via the signal isolation unit 1731. The signal isolation unit 1731 of the first transmission end A isolates a voltage provided by the power source 1770, outputs an isolated voltage and then transmits it through the transmission circuit of the slip ring transmission module 1720 to the second transmission end B. The signal isolation unit 1731 of the second transmission end B isolates the previously isolated voltage again, outputs another isolated voltage, and provides it to the load, so that the interfering signal may be isolated.
[0142] In some embodiments, the signal isolation unit 1731 includes at least one of an isolation transformer, an AC-DC circuit, or a DC-AC circuit. The isolation transformer is configured to transfer electrical power from one circuit to another circuit while simultaneously achieving electrical isolation and voltage conversion. The AC-DC circuit is configured to convert an alternating current (AC) to a direct current (DC) . The DC-AC circuit is configured to convert the DC to the AC.
[0143] When the signal anti-interference module 1730 includes the filtering unit 1833, and each of the power line communication module 1720 located at the first transmission end A and the power line communication module 1720 located at the second transmission end B is connected to the filtering unit 1833, the filtering unit 1833 located at the first transmission end A is provided at the rotating portion of the scanner gantry, and the filtering unit 1833 located at the second transmission end B is provided at the fixed portion of the scanner gantry. The filtering unit 1833 filters out the high frequency portion and the low frequency portion of the data signals.
[0144] In some embodiments, the filtering unit 1833 includes one or a combination of a filtering inductor and a filtering capacitor. The filtering inductor is configured to remove a high-frequency noise and an AC component from the circuit, making the signal smoother and more stable. The filtering capacitor is configured to remove a high-frequency noise and a fluctuating component from the circuit to make the signal smoother and more stable.
[0145] In some embodiments, the signal anti-interference module 1730 further includes at least one grounding unit 1732 (or at least one grounding unit 1832) , and the electromagnetic shielding unit connects to the at least one grounding unit 1732 to ground the interfering signal. For example, a grounding unit may be connected to the electromagnetic shielding unit at a location where the first transmission end A is disposed, and a grounding unit may be located at a location where the second transmission end B is disposed.
[0146] FIG. 19 is a flowchart illustrating an exemplary process for transmitting slip ring data for a medical scanning device according to some embodiments of the present disclosure. A process for transmitting slip ring data 1900 (referred to as process 1900) may be realized by a processing device or a system for transmitting the slip ring data 2100 (referred to as the system 2100) of FIG. 21. In some embodiments, the process 1900 may include the following operations.
[0147] In 1910, data signals to be transmitted is received from a first transmission end.
[0148] The data signals to be transmitted refer to data that needs to be transmitted between different devices or components.
[0149] In some embodiments, the data signals to be transmitted includes image data signals and control data signals. Further descriptions regarding the image data signals and the control data signals may be found elsewhere in the present disclosure, e.g., FIG. 2 and related descriptions thereof.
[0150] In some embodiments, the control data signals may be generated by a control module of the medical scanning device, and the image data signals may be obtained by scanning a target object (e.g., a patient or a phantom, etc. ) by an image acquisition module of the medical scanning device.
[0151] The data signals to be transmitted may be real-time or non-real-time. Real-time means that the data signals are obtained from the control module or the image acquisition module at a current time period (including a certain time period in the past, such as 1 second, 1 minute, 1 hour, etc. ) , and non-real-time means that the data signals are obtained and stored in advance from the master control module or the image acquisition module, e.g., in a storage module of the first transmission end.
[0152] In 1920, the data signals are modulated based on a preset communication calibration table to change the frequency of the data signals.
[0153] The communication calibration table refers to a reference used to guide the modulator and the demodulator on how to encode, decode, tune, and / or demodulate communication data. For example, the communication calibration table may be a configuration table for communication modulation, which reflects a communication channel condition of the slip ring at various moments and positions with the rotation of the gantry. The communication channel condition includes a specific condition of a signal-to-noise ratio (SNR) . Specific descriptions regarding the communication calibration table may be found in FIG. 16 and its related descriptions.
[0154] The preset communication calibration table is a pre-obtained or preset communication calibration table. The data signals are modulated based on the preset communication calibration table to enable the modulated data signals to be transmitted between the first transmission end and the second transmission end via the transmission circuit.
[0155] In this embodiment, the communication calibration table is obtained through pre measurement. Compared with the existing estimated communication calibration table, the communication calibration table is more accurate and may be applied to a modem (modulator-demodulator) timely. At the same time, the communication calibration table may be updated timely according to the actual application situation. For example, when the error rate is determined to be high (e.g., when the error rate exceeds a preset value, such as 5%,%3, etc. ) , an updated communication calibration table may be executed.
[0156] In some embodiments, the preset communication calibration table may be determined based on a pattern of change in the data signals of the medical scanning device at each rotation cycle. Specific descriptions regarding determining the preset communication calibration table may be found in FIG. 20 and related descriptions thereof.
[0157] Modulation refers to a processing of the data signals to change the frequency of the data signals. For example, low-frequency data signals are adjusted to high-frequency data signals. Merely by way of example, the system may amplify the frequency of the data signals through a modulator (e.g., the modulator) to obtain modulated data signals. Exemplarily, the high-frequency data signals may be in a frequency band of 1 MHz to 100 MHz, whereas the electrical power frequency of the electrical power is generally 50 or 60 Hz, which are in different frequency bands. In addition, the amplitude of the data signals may be smaller than the amplitude of the electrical power (e.g., an amplitude of the data signals of 5V compared to an amplitude of the electrical power of 220V or 400V) , so that the data signals does not affect the normal operation of the slip ring device. Through the modulation process described above, the data signals may be differentiated from the electrical power frequency of the electrical power, so that the frequency of the data signals and the frequency of the electrical power are completely isolated from each other, and do not interfere with each other.
[0158] In some embodiments, the modulation of the data signals may be realized by a power line communication module provided in a slip ring device of the medical scanning device, for example, modulation of the data signals may be carried out by a first power line communication module of the first transmission end. Descriptions regarding the power line communication module may be found in the preceding description.
[0159] In some embodiments, the modulator (or demodulator) may determine the SNR corresponding to the data signals according to the communication channel condition, to select different modulation and coding manners (when the SNR is good, a modulation and coding manner with a high transmission rate is selected; when the SNR is poor, a modulation and coding manner with a low transmission rate is selected. Thus, the inaccuracy and hysteresis of the estimation of the communication signal by the first transmission end may be avoided.
[0160] In 1930, the modulated data signals are sent to the second transmission end using at least one transmission circuit.
[0161] In some embodiments, the at least one transmission circuit may be a transmission circuit of a slip ring transmission module in the slip ring device of the medical scanning device. The slip ring transmission module may include at least one transmission circuit that may be used to send the electrical power obtained from the first transmission end to the second transmission end, and that may also send the modulated data signals to the second power transmission end.
[0162] For example, when transmitting the modulated data signals to the second transmission end via at least one transmission circuit of the slip ring transmission module, the modulated data signals are transmitted to the second transmission end sequentially via the first transmission end, the power line, the slip ring transmission module, and the power line.
[0163] In some embodiments, the process 1900 may further include an optional operation 1940.
[0164] In 1940, the received data signals are demodulated using the second transmission end based on the communication calibration table.
[0165] Demodulation refers to a process of restoring the modulated data signals to data signals before being modulated. Demodulation may be, for example, the reduction of the frequency of the data signals to obtain demodulated data signals by the demodulator. The demodulated data signals may reflect the true content originally contained in the data signals.
[0166] It should be noted that the above process describes a process of sending the data signals from the first transmission end to the second transmission end, and the above process is equally applicable to sending the data signals from the second transmission end to the first transmission end. The process is similar and will not be repeated here.
[0167] In the method for transmitting the slip ring data in this embodiment, the data signals to be transmitted are modulated by a preset channel calibration table, and the modulated data signals may be transmitted through the transmission circuit of the slip ring device, then the data signals are sent to the second transmission end, which achieves a high-speed transmission of the data signals.
[0168] FIG. 20 is a flowchart illustrating an exemplary process for determining a preset communication calibration table according to some embodiments of the present disclosure. As shown in FIG. 20, a process 2000 for determining the preset channel calibration table may include the following operations.
[0169] In 2010, channel data for data communication between a first transmission end and a second transmission end is obtained when a slip ring disk and a conductive assembly of a medical scanning device are in a relative rotation.
[0170] The channel data refers to communication standard information reflecting the data communication of the data signals between the first transmission end and the second transmission end. For example, the channel data may include frequency and clock synchronization information, channel coding and decoding information, and a signal-to-noise ratio at each frequency point on a communication band.
[0171] In some embodiments, the channel data may be obtained by rotating the slip ring device for one week or two weeks based on a preset scanning protocol and counting the information of the data signals in data communication between the first transmission end and the second transmission end during the rotation.
[0172] In 2020, variation information of the signal-to-noise ratio at each frequency point on the communication band with a rotation period is determined based on the channel data.
[0173] Merely by way of example, the system 2100 may determine a variation relationship between the signal-to-noise ratio and the rotation period. In some embodiments, the variation relationship between the signal-to-noise ratio and the rotation period may be understood as a relationship between a count of bits transmitted by the data signals over time at each communication frequency point. In this regard, the signal-to-noise ratio may be determined by counting the count of bits transmitted by the data signals at each communication frequency point. Furthermore, different rotation periods reflect different times in the rotation process. Thus, by counting the count of bits transmitted by the data signals over time at each communication frequency point, the variation law of the signal-to-noise ratio with the rotation period may be obtained.
[0174] In some embodiments, the variation information may be embodied by a bit loading table.
[0175] In 2030, the communication calibration table is determined based on the variation information.
[0176] In some embodiments, the system 2100 may use the bit loading table corresponding to each communication frequency point at different times as the preset communication calibration table. The bit loading table refers to a technique used for modulation and coding in the communication system and may be used in multicarrier modulation techniques such as orthogonal frequency division multiplexing (OFDM) .
[0177] In some embodiments, the communication calibration table may be updated in real time with the change of the channel data. The channel calibration module may continuously monitor the channel data and the communication calibration table and adjust parameters and settings in the communication calibration table according to needs. For example, when a symbol error rate in the communication calibration table exceeds a symbol error rate threshold, the system 2100 may update the communication calibration table. A specific updating process may be to re-execute the process 2000, with the newly acquired communication calibration table as the updated communication calibration table. Wherein, the symbol error rate threshold may be a manually preset value.
[0178] FIG. 21 is a diagram illustrating an exemplary system for transmitting slip ring data for a medical scanning device according to some embodiments of the present disclosure.
[0179] The system 2100 for a medical scanning device includes a receiving module 2110, a modulation module 2120, and a transmission module 2130.
[0180] The receiving module 2110 is configured to receivedata signals to be transmitted from a first transmission end.
[0181] The modulation module 2120 is configured to obtain modulated data signals by modulating the data signals based on a preset communication calibration table to change the frequency of the data signals.
[0182] The transmission module 2130 is configured to send the modulated data signals to a second transmission end via at least one transmission circuit.
[0183] In some embodiments, the system 2100 further includes a demodulation module 2140, the demodulation module being configured to demodulate the received data signals based on the communication calibration table via the second transmission end.
[0184] The present disclosure provides a slip ring device for a medical scanning device. The slip ring device includes a slip ring disk and a conductive assembly. The slip ring disk is disposed at a rotating assembly of a gantry of the medical scanning device and the conductive assembly is disposed at a fixed assembly of the gantry of the medical scanning device, or the slip ring disk is disposed at the fixed assembly of the gantry of the medical scanning device and the conductive assembly is disposed at the rotating assembly of the gantry of the medical scanning device. The slip ring disk and the conductive assembly are in sliding contact, and the slip ring disk is able to rotate relative to the conductive assembly. The slip ring disk includes at least one slideway, and the at least one slideway includes at least one blocking portion.
[0185] The present disclosure provides a slip ring device including a slip ring transmission module and two power line communication modules. The slip ring transmission module may form at least one power transmission circuit. Each of the at least one power transmission circuit may be configured to obtain electrical power through a first transmission end of the transmission circuit and then output the electrical power to a load via a second transmission end of the transmission circuit. The two power line communication modules are provided the first transmission end and the second transmission end, respectively, and each of thetwo power line communication modules is configured to adjust the frequency of data signals to enable the data signals to be transmitted from the second transmission end to a master control module located at the first transmission end. The data signals include medical image data signals.
[0186] The present disclosure provides a power line communication device including a slip ring transmission module, two power line communication modules, and a signal anti-interference module. The slip ring transmission module may form at least one transmission circuit. Each of the at least one transmission circuit is configured to obtain electrical power via a first transmission end of the transmission circuit and then output the electrical power to a load via a second transmission end of the transmission circuit. The two power line communication modules are provided at the first transmission end and the second transmission end, respectively, and each of the two power line communication module is configured to adjust the frequency ofdata signals to enable the data signals to be transmitted in the transmission circuit. The signal anti-interference module is provided in one of the at least one transmission circuit.
[0187] It should be noted that the above description of the system and its modules is for descriptive convenience only, and does not limit the present disclosure to the scope of the embodiments. It is to be understood that for those skilled in the art, after understanding the principle of the system, it may be possible to arbitrarily combine each module or form a sub-system to be connected to the other modules without departing from the principle. In some embodiments, the modules described above may be different modules in a single system, or a single module may implement the functions of two or more of the modules described above. For example, each module may share a common storage module, and each module may each have its storage module. Such morphisms are within the scope of protection of the present disclosure.
[0188] Some embodiments of the present disclosure may bring about the following beneficial effects. First, the slideway of the slip ring device is divided into at least two segments, which may ensure that the lengths of the data transmission paths are equal, avoiding the reduction of the transmission rate caused by the multipath effect. Second, by adding a plurality of conductive assemblies or a plurality of connection ports connecting the slip ring lead line, and distributing the plurality of conductive assemblies or the plurality of connection ports connecting the slip ring lead line at equal intervals, the variation period and the variation magnitude of the influencing factors (the transmission paths) of the multipath effect may be reduced, which reduces the influence of the multipath effect on the transmission of the power line carrier signal in the slideway. Third, the power line communication module of the slip ring device may realize bi-directional transmission of data signals to simplify the structure of the device and reduce the cost. Fourth, the signal anti-interference module is provided on the slip ring device, which reduces the environmental interference and reduces the noise from the power source and / or the load. Fifth, the communication channel calibration is preset, and the optimal coding scheme and modulation parameters of the data signals to be transmitted are determined, which helps ensure that the data signals may remain stable and accurate in the transmission process.
[0189] Having thus described the basic concepts, it may be rather apparent to those skilled in the art after reading this detailed disclosure that the foregoing detailed disclosure is intended to be presented by way of example only and is not limiting. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and amendments to the present disclosure. These alterations, improvements, and amendments are intended to be suggested by this disclosure and are within the spirit and scope of the exemplary embodiments of the present disclosure.
[0190] Moreover, certain terminology has been used to describe embodiments of the present disclosure. For example, the terms "one embodiment, " "an embodiment, " and / or "some embodiments" mean that a particular feature, structure, or feature described in connection with the embodiment is included in at least one embodiment of the present disclosure. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various portions of the present disclosure are not necessarily all referring to the same embodiment. In addition, some features, structures, or characteristics of one or more embodiments in the present disclosure may be properly combined.
[0191] Furthermore, the recited order of processing elements or sequences, or the use of numbers, letters, or other designations, therefore, is not intended to limit the claimed processes and methods to any order except as may be specified in the claims. Although the above disclosure discusses some embodiments of the invention currently considered useful by various examples, it should be understood that such details are for illustrative purposes only, and the additional claims are not limited to the disclosed embodiments. Instead, the claims are intended to cover all combinations of corrections and equivalents consistent with the substance and scope of the embodiments of the present disclosure. For example, although the implementation of various components described above may be embodied in a hardware device, it may also be implemented as a software only solution, e.g., an installation on an existing server or mobile device.
[0192] Similarly, it should be appreciated that in the foregoing description of embodiments of the present disclosure, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the various embodiments. However, this disclosure does not mean that object of the present disclosure requires more features than the features mentioned in the claims. Rather, claimed subject matter may lie in less than all features of a single foregoing disclosed embodiment.
[0193] In some embodiments, the numbers expressing quantities or properties used to describe and claim certain embodiments of the present disclosure are to be understood as being modified in some instances by the term "about, " "approximate, " or "substantially. " For example, "about, " "approximate" or "substantially" may indicate ±20%variation of the value it describes, unless otherwise stated. Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the present disclosure are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable.
[0194] Each of the patents, patent applications, publications of patent applications, and other material, such as articles, books, specifications, publications, documents, things, and / or the like, referenced herein is hereby incorporated herein by this reference in its entirety for all purposes. History application documents that are inconsistent or conflictive with the contents of the present disclosure are excluded, as well as documents (currently or subsequently appended to the present specification) limiting the broadest scope of the claims of the present disclosure. By way of example, should there be any inconsistency or conflict between the description, definition, and / or the use of a term associated with any of the incorporated material and that associated with the present document, the description, definition, and / or the use of the term in the present document shall prevail.
[0195] In closing, it is to be understood that the embodiments of the present disclosure disclosed herein are illustrative of the principles of the embodiments of the present disclosure. Other modifications that may be employed may be within the scope of the present disclosure. Thus, by way of example, but not of limitation, alternative configurations of the embodiments of the present disclosure may be utilized in accordance with the teachings herein. Accordingly, embodiments of the present disclosure are not limited to that precisely as shown and described.
Claims
1.A slip ring device for a medical scanning device, comprising:a slip ring transmission module (210) including at least one transmission circuit; andat least two power line communication modules (220) configured to adjust a frequency of data signals to enable the data signals to be transmitted in the transmission circuit, wherein each of the first transmission end and the second transmission end is provided with at least one of the at least two power line communication modules (220) .2.The device of claim 1, wherein the slip ring transmission module (210) includes a slip ring disk (310) and a conductive assembly (320) ; the slip ring disk (310) is disposed at the first transmission end and the conductive assembly (320) is disposed at the second transmission end, or the slip ring disk (310) is disposed at the second transmission end and the conductive assembly (320) is disposed at the first transmission end;the slip ring disk (310) and the conductive assembly (320) are in sliding contact, the slip ring disk (310) is able to rotate relative to the conductive assembly (320) ; andthe slip ring disk (310) includes at least one slideway, and at least one blocking portion is provided on the at least one slideway.3.The device of claim 2, wherein the at least one blocking portion includes at least one of an insulating layer or a notch.4.The device of claim 2 or claim 3, wherein one of the at least one slideway includes at least two blocking portions, and the at least two blocking portions divide the one of the at least one slideway into at least two segments; andthe at least two segments of the one of the at least one slideway are insulated from each other.5.The device of claim 4, wherein one of the at least two power line communication modules is a first power line communication module, and the first power line communication module is connected to a predetermined position of each of the at least two segments of the one of the at least one slideway via a connecting line.6.The device of claim 5, wherein lengths of connecting lines connecting the at least two segments of the one of the at least one slideway are the same.7.The device of claim 5 or claim 6, wherein the at least two blocking portions are symmetrically disposed on the one of the at least one slideway to make the at least two segments of the one of the at least one slideway of equal length; and / orthe predetermined position of one of the at least two segments of the one of the at least one slideway is located at a middle region of the one of the at least two segments of the one of the at least one slideway.8.The device of any one of claim 5-claim 7, wherein the conductive assembly (320) includes at least one first component and at least one second component corresponding to the at least one first component, one of the at least two power line communication modules (220) disposed on the second transmission end is a second power line communication module, the second power line communication module is connected to the at least one second component by at least two connecting lines; andthe at least one first component is arranged at an equal interval along a circumference direction of the one of the at least one slideway.9.The device of claim 8, wherein the at least one first component includes a carbon brush disc and the at least one second component includes carbon brushes; or the at least one first component includes an electric brush disc and the at least one second component includes electric brushes.10.The device of any one of claims 1 to 9, wherein the data signals include at least one of medical image data signals or control data signals.11.The device of claim 10, wherein the data signals and electrical power are transmitted through a same of the at least one transmission circuit.12.The device of claim 10, wherein the first transmission end includes a master control module, the second transmission end includes an image acquisition module, and the at least two power line communication modules (220) are configured to adjust a frequency of the control data signals to make the control data signals to be bi- directionally transmitted between the master control module and the image acquisition module via the at least one transmission circuit.13.The device of claim 12, wherein a count of the at least one transmission circuit is equal or exceed 2, a first transmission circuit among the at least two transmission circuits is configured to transmit the electrical power, and a second transmission circuit of the least two transmission circuits is configured to transmit the medical image data signals and / or the control data signals.14.The device of any one of claims 11 to 12, wherein one of the at least one transmission circuit synchronously transmits at least two of the electrical power, the medical image data signals, or the control data signals.15.The device of claim 8 or claim 9, wherein the second power line communication module includes a modulator, and the modulator is configured to receive and modulate the data signals to obtain modulated data signals with a changed frequency; andthe first power line communication module includes a demodulator, and the demodulator is configured to receive and demodulate the modulated data signals to obtain demodulated data signals with the same frequency of the demodulated data signals.16.The device of claim 15, wherein the second power line communication module further includes a power amplification circuit, and the power amplification circuit is configured to amplify the data signals modulated by the modulator.17.The device of claim 15 or claim 16, wherein the first power line communication module further includes a filtering circuit, and the filtering circuit is configured to filter the data signals and transmit the data signals to the demodulator.18.The device of any one of claims 15 to 17, wherein at least one of the first power line communication module or the second power line communication module further includes a protection unit, the protection unit is configured to receive the data signals modulated by the modulator, convert the data signals into a high voltage signal, and transmit the high voltage signal to the at least one transmission circuit; orthe protection unit is configured to receive a high voltage signal converted by the data signals, convert the high voltage signal into a low voltage signal, and transmit the low voltage signal to the demodulator.19.The device of any one of claims 15 to 18, wherein each of the first power line communication module or the second power line communication module further includes a channel calibration module, and the channel calibration module is configured to obtain channel data for data communication between the first transmission end and the second transmission end.20.The device of claim 19, wherein the channel calibration module is further configured to generate a communication calibration table based on the channel data, and the communication calibration table is configured for the modulator and the demodulator to code, decode, adjust, and demodulate the data signals.21.The device of any one of claims 1 to 20, wherein the slip ring device further comprises a signal anti-interference module provided in one of the at least one transmission circuit.22.The device of claim 21, wherein the signal anti-interference module includes at least one of an electromagnetic shielding unit, one or more signal isolation units, or a filtering unit.23.The device of claim 22, wherein the electromagnetic shielding unit is configured as a shielded electrically conductive layer wrapping the one of the at least one transmission circuit.24.The device of claim 23, wherein the signal anti-interference module includes a grounding unit, and the grounding unit is connected to the electromagnetic shielding unit.25.The device of any one of claim 22 to 24, wherein the one or more signal isolation units are provided at the first transmission end and the second transmission end, a signal isolation unit at the first transmission end being connected to a power source, and the signal isolation unit at the first transmission end being connected to the load.26.The device of any one of claim 22 to 25, wherein one of the one or more signal isolation units includes at least one of an isolation transformer, an AC-DC circuit, or a DC-AC circuit.27.The device of any one of claim 22 to 26, wherein the at least two power line communication modules (220) are both connected to the filtering unit.28.The device of claim 27, wherein the filtering unit includes at least one of a filtering inductor or a filtering capacitor.29.The device of claim 1 to 27, wherein one of the at least one transmission circuit is configured to output electrical power obtained from the first transmission end to a load via the second transmission end.30.A method for transmitting slip ring data for a medical scanning device, comprising:receiving data signals to be transmitted from a first transmission end;obtaining modulated data signals by modulating the data signals based on a communication calibration table to change a frequency of the data signals; andsending the modulated data signals to a second transmission end via at least one transmission circuit.31.The method of claim 30, wherein the communication calibration table is obtained by:obtaining channel data for data communication between the first transmission end and the second transmission end of the medical scanning device when a slip ring disk (310) rotates relative to a conductive assembly (320) ;determining, based on the channel data, a variation law of a signal-to-noise ratio at each frequency point on a communication band with a rotation period; anddetermining the communication calibration table based on the variation law.32.A system for transmitting slip ring data for a medical scanning device, comprising:a receiving module configured to receive data signals to be transmitted from a first transmission end;a modulation module configured to obtain a modulated data signal by modulating the data signals based on a communication calibration table to change a frequency of the data signals; anda transmission module configured to transmit the modulated data signals to a second transmission end via at least one transmission circuit.33.A slip ring device for a medical scanning device, comprising a slip ring disk (310) and a conductive assembly (320) , wherein the slip ring disk (310) is disposed at a rotating assembly of a gantry of the medical scanning device and the conductive assembly (320) is disposed at a fixed assembly of the gantry of the medical scanning device, or the slip ring disk (310) is disposed at the fixed assembly of the gantry of the medical scanning device and the conductive assembly (320) is disposed at the rotating assembly of the gantry of the medical scanning device, and the slip ring disk (310) and the conductive assembly (320) are in sliding contact, the slip ring disk (310) is able to rotate relative to the conductive assembly (320) , wherein:the slip ring disk (310) includes at least one slideway; andthe at least one slideway includes at least one blocking portion.34.A slip ring device, comprising:a slip ring transmission module (210) forming at least one transmission circuit, andat least two power line communication modules (220) , wherein each of the first transmission end and the second transmission end is provided with one of the at least two power line communication modules (220) , and the at least two power line communication modules are configured to adjust a frequency of data signals to enable the data signals to be transmitted from the second transmission end to a master control module located at the first transmission end, wherein:the data signals include medical image data signals.35.A power line communication device, comprising:a slip ring transmission module (210) forming at least one transmission circuit;at least two power line communication modules, wherein each of the first transmission endand the second transmission end is provided with one of the at least two power line communication modules (220) , and the at least two power line communication modules (220) are configured to adjust a frequency of data signals to enable the data signals to be transmitted in the transmission circuit; anda signal anti-interference module provided in one of the at least one transmission circuit.36.The device of claim 35, wherein the signal anti-interference module includes one or more of an electromagnetic shielding unit, one or more signal isolation units, or a filtering unit.37.The device of claim 36, wherein the electromagnetic shielding unit is configured as a shielded electrically conductive layer wrapping the transmission circuit.38.The device of claim 36 or 37, wherein one of the one or more signal isolation units includes at least one of an isolation transformer, an AC-DC circuit, or a DC-AC circuit.39.The device of any one of claim 36-38, wherein the filtering unit includes at least one of a filtering inductor or a filtering capacitor.40.A slip ring device for a medical scanning device, comprising a slip ring disk and a conductive assembly, wherein the slip ring disk is disposed at a rotating assembly of a gantry of the medical scanning device and the conductive assembly is disposed at a fixed assembly of the gantry of the medical scanning device, or the slip ring disk is disposed at the fixed assembly of the gantry of the medical scanning device and the conductive assembly is disposed at the rotating assembly of the gantry of the medical scanning device, the slip ring disk and the conductive assembly are in sliding contact, the slip ring disk is able to rotate relative to the conductive assembly, wherein:the slip ring disk (310) includes at least one slideway; andthe conductive assembly is electrically connected to the at least one slideway through at least two connecting lines.41.The device of claim 40, wherein the at least two connecting lines have a same length.42.The device of claim 40 or claim 41, wherein a distance between each of the at least two connecting lines and the at least one slideway is equal.