Slip ring system and CT device
By transmitting optical signals through a channel formed between the stator and rotor sidewalls in the slip ring system, the problems of low data transmission rate and high cost in the prior art are solved, achieving high-bandwidth and high-speed communication, while reducing structural complexity and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI UNITED IMAGING HEALTHCARE
- Filing Date
- 2025-01-23
- Publication Date
- 2026-07-07
AI Technical Summary
Existing slip ring systems in CT equipment suffer from low data transmission rates and high costs. In particular, capacitive coupling technology requires more communication components and complex algorithms, while optical signal transmission systems are complex in structure and expensive.
Optical signal transmission is achieved by using a channel formed between the stator and rotor. The signal transmitter and receiver are located at different positions in the channel. The signal is transmitted within the channel by reflection through the sidewalls of the stator and/or rotor, which simplifies the structure and reduces costs.
It improves data transmission efficiency and speed, reduces structural complexity and cost, and is compatible with existing optical modules while reducing installation and maintenance costs.
Smart Images
Figure CN224461709U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, and in particular to a slip ring system and a CT device. Background Technology
[0002] Computed tomography (CT) equipment uses highly sensitive instruments to measure the human body based on the different absorption and transmittance of X-rays by different tissues. The acquired data is then input into a computer, which processes the data, allowing the CT equipment to capture cross-sectional or three-dimensional images of the examined area, detecting even small lesions in any part of the body. CT equipment includes a slip ring system.
[0003] In related technologies, some slip ring systems use capacitive coupling technology. The data transmission rate in these slip ring systems is typically in the range of 1 to 10 Gbps. To improve the data transmission rate, more communication components and more complex data transmission algorithms are required, leading to a significant increase in cost. In other slip ring systems, the optical transmitter and optical receiver transmit optical signals through media such as light strips or optical fibers. The structure of these slip ring systems is more complex and the cost is also higher. Utility Model Content
[0004] Embodiments of this application provide a slip ring system and a CT device for improving the transmission rate and reducing the cost of slip ring systems in related technologies.
[0005] In a first aspect, embodiments of this application provide a slip ring system for use in medical devices. The slip ring system includes: a stator, a rotor, a signal transmitter, and a signal receiver. The signal transmitter is disposed on one of the stator and the rotor, and is used to emit a first signal. The signal receiver is disposed on the other of the stator and the rotor, and is used to receive the first signal. A channel is formed between the sidewall of the stator and the sidewall of the rotor. A first opening is provided on the sidewall of the stator, and a second opening is provided on the sidewall of the rotor. The first signal emitted by the signal transmitter is emitted into the interior of the channel through one of the first opening and the second opening. The signal receiver is located at the other of the first opening and the second opening. At least the sidewall of the stator is capable of reflecting the first signal, so that the first signal is transmitted to the signal receiver within the channel along the extension direction of the channel.
[0006] In some embodiments, the sidewalls of the stator are capable of reflecting the first signal so that the first signal is transmitted through the sidewalls of the stator along the extension direction of the channel.
[0007] In some embodiments, both the sidewall of the rotor and the sidewall of the stator are capable of reflecting the first signal, so that the first signal is transmitted along the extension of the channel through the sidewall of the stator and the sidewall of the rotor.
[0008] In some embodiments, the channel extends circumferentially along the stator in a ring shape; the slip ring system includes at least one sub-transmission system, the sub-transmission system including a signal transmitter and a signal receiver; the channel includes at least one sub-channel extending circumferentially along the channel, the sub-channel including a first opening and a second opening, and at least one sub-transmission system is provided on each sub-channel so that the first signal emitted by the signal transmitter in the sub-transmission system is transmitted within the sub-channel to the corresponding signal receiver.
[0009] In some embodiments, the number of the sub-transmission systems is multiple, and when some or all of the sub-transmission systems are set in one sub-channel, the parameters of the first signals emitted by the multiple signal transmitters in different sub-transmission systems set in the sub-channel are different.
[0010] In some embodiments, the number of sub-transmission systems is multiple, the number of sub-channels is multiple, the multiple sub-channels are arranged at intervals along a first direction, and the multiple sub-channels are configured in one-to-one correspondence with the multiple sub-transmission systems.
[0011] In some embodiments, the first signal is an optical signal, and the light-receiving side of the signal receiver is provided with a first lens, which is used to converge the light.
[0012] In some embodiments, the first signal is an optical signal, and the light-receiving side of the signal receiver is provided with a filter element.
[0013] In some embodiments, the first signal is an optical signal, and the light-emitting side of the signal transmitter is provided with a collimating lens.
[0014] In some embodiments, the signal transmitter and the signal receiver are located outside the channel, with the transmitting end of the signal transmitter facing one of the first opening and the second opening, and the transmitting end of the signal transmitter facing the channel; the photosensitive element of the signal receiver faces the other of the first opening and the second opening, and the photosensitive element of the signal receiver facing the channel; one of the first opening and the second opening is used for the first signal to enter the channel, and the other of the first opening and the second opening is used for the first signal inside the channel to exit the channel.
[0015] In some embodiments, the signal transmitter includes a transmitting end located within the channel, the transmitting end being used to emit the first signal, the first signal being an optical signal; the signal receiver includes a photosensitive element located within the channel.
[0016] Secondly, embodiments of this application also provide a CT device, including: a stator and a rotor, the stator having an annular structure; the rotor having an annular structure and being capable of rotating relative to the rotor; the inner sidewall of the annular structure of the stator and the outer sidewall of the annular structure of the rotor being disposed opposite to each other, and the two sidewalls together forming a channel; the reflection coefficient of the inner sidewall of the annular structure of the stator and the outer sidewall of the annular structure of the rotor is at least 0.8, so as to realize the reflection transmission of a first signal in the channel.
[0017] Thirdly, this application also provides a CT device, including: a stator and a rotor, the stator having an annular structure; the rotor having an annular structure and being capable of rotating relative to the rotor; the inner sidewall of the annular structure of the stator and the outer sidewall of the annular structure of the rotor being disposed opposite to each other, and the two sidewalls together forming a channel; the surface roughness of the inner sidewall of the annular structure of the stator and the outer sidewall of the annular structure of the rotor is less than or equal to 1 μm, so as to realize the reflection transmission of a first signal in the channel.
[0018] Fourthly, this application also provides a CT device, including: a stator, a rotor, a signal transmitter, and a signal receiver. The stator has an annular structure; the rotor has an annular structure and is rotatable relative to the rotor; the inner sidewall of the annular structure of the stator and the outer sidewall of the annular structure of the rotor are disposed opposite to each other, and the two sidewalls together form a channel; the signal transmitter is disposed on one of the stator and the rotor, and the signal transmitter is used to emit a first signal; the optical axis of the first signal emitted by the signal transmitter is inclined relative to the extension direction of the channel, so that the first signal can be reflected and transmitted in the channel; the signal receiver is disposed on the other of the stator and the rotor, and the signal receiver is used to receive the first signal.
[0019] This application provides a slip ring system in which a channel is formed between the sidewalls of the stator and the sidewalls of the rotor. The sidewalls of the stator can reflect a first signal, that is, the inner surface of the channel can reflect the first signal. At the same time, through the first and second openings on the channel, the first signal emitted by the signal transmitter onto the inner surface of the channel is reflected and transmitted within the channel until it is received by the signal receiver. This realizes the transmission of the first signal emitted by the signal transmitter to the signal receiver through the channel. Compared with related technologies that rely on media such as LED strips or optical fibers to achieve the transmission of the first signal, the slip ring system of this application transmits directly within the channel, which not only improves the transmission efficiency of the first signal and is conducive to realizing high-bandwidth and high-speed communication, but also has a simple structure, low installation and maintenance costs, and is compatible with existing optical modules, thus reducing the cost of the slip ring system. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the slip ring system used in a CT scanner according to an embodiment of this application;
[0022] Figure 2 For application in CT equipment, a schematic diagram of a slip ring system is shown, in which the signal transmitter is located on the stator and the signal receiver is located on the rotor, and only the sidewall of the stator can reflect the first signal.
[0023] Figure 3 For application in CT equipment, a schematic diagram of a slip ring system is shown, in which the signal transmitter is mounted on the rotor and the signal receiver is mounted on the stator, and only the sidewall of the stator can reflect the first signal.
[0024] Figure 4 A schematic diagram of a slip ring system for use in CT equipment, wherein the signal transmitter is mounted on the stator and the signal receiver is mounted on the rotor, and the sidewalls of the stator and the rotor can reflect the first signal.
[0025] Figure 5 A schematic diagram of a slip ring system for use in CT equipment, wherein the signal transmitter is mounted on the rotor and the signal receiver is mounted on the stator, and both the sidewalls of the stator and the sidewalls of the rotor can reflect the first signal.
[0026] Figure 6 This is a schematic diagram of a slip ring system used in CT equipment, which includes multiple sub-channels and multiple sub-transmission systems.
[0027] The following are the labeling elements in the figure:
[0028] 1. Machine frame; 2. Inspection bed;
[0029] 100, Stator; 200, Rotor; 300, First signal;
[0030] 10. Signal transmitter; 11. Collimating lens; 12. Drive circuit;
[0031] 20. Signal receiver; 21. First lens; 22. Signal conversion and amplification circuit;
[0032] 30. Channel; 301. First opening; 302. Second opening. Detailed Implementation
[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0034] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0035] Computed tomography (CT) equipment uses highly sensitive instruments to measure the human body based on the different absorption and transmittance of X-rays by different tissues. The acquired data is then input into a computer, which processes the data to capture cross-sectional or three-dimensional images of the examined area, detecting even small lesions in any part of the body. A CT scanner consists of multiple components, including a photoelectric sensor, detector, DAS (Digital Analog Array), array processor, high-voltage generator, collimator, slip ring system, and other CT equipment subsystems.
[0036] In related technologies, some slip ring systems employ capacitive coupling technology. The data transmission rate in these systems is typically in the range of 1–10 Gbps. Improving the data transmission rate requires more communication components and more complex data transmission algorithms, leading to a significant increase in cost. Other slip ring systems include a rotor and a stator, an optical transmitter and optical fiber (or LED strip) fixed to the rotor, and an optical receiver mounted on the stator. The optical transmitter converts data into optical signals and transmits them to the optical fiber. The optical receiver receives the optical signals on the receiving side of the optical fiber, completing contactless data transmission from the rotor to the stator. That is, the optical transmitter and receiver transmit optical signals through media such as LED strips or optical fibers. This type of slip ring system has a more complex structure, and the use of optical fiber is costly.
[0037] To address the aforementioned problems, this application provides a slip ring system.
[0038] like Figure 1 As shown, the slip ring system includes: a stator 100, a rotor 200, a signal transmitter 10, and a signal receiver 20. The signal transmitter 10 is disposed on one of the stator 100 and the rotor 200, and is used to emit a first signal 300. The signal receiver 20 is disposed on the other of the stator 100 and the rotor 200, and is used to receive the first signal 300. A channel 30 is formed between the sidewall of the stator 100 and the sidewall of the rotor 200, that is, the channel 30 extends in a ring shape along the circumference of the stator 100. The sidewall of the stator 100 is provided with... The first opening 301 and the second opening 302 are located on the channel 30. The first signal 300 emitted by the signal transmitter 10 is emitted into the interior of the channel 30 through one of the first opening 301 and the second opening 302. The signal receiver 20 is located at the other of the first opening 301 and the second opening 302. The sidewall of the stator 100 can reflect the first signal 300 so that the first signal 300 is transmitted to the signal receiver 20 along the extension direction of the channel 30. That is, when the first signal 300 enters the channel 30, the first signal 300 can be reflected by the sidewall of the stator 100 and transmitted to the signal receiver 20 along the extension direction of the channel 30; or, the first signal 300 can be reflected by both the sidewall of the stator 100 and the sidewall of the rotor 200 and transmitted to the signal receiver 20 along the extension direction of the channel 30.
[0039] The aforementioned signal transmitter 10 is used to emit a first signal 300, which can be an optical signal. The parameters of the first signal 300 can be, but are not limited to, wavelength. The wavelength parameters of the first signal 300 include visible light, infrared light, ultraviolet light, etc. The first signal 300 can also be a radio frequency signal. When the first signal 300 is a radio frequency signal, its parameters can be power, frequency, etc., which are not specifically limited here.
[0040] The following explanation uses the example of the first signal 300 being an optical signal. When the first signal 300 is an optical signal, the signal transmitter 10 can be called an optical signal transmitter, and the signal receiver 20 can be called an optical signal receiver.
[0041] The stator 100 and rotor 200 described above are two ring-shaped structures fitted together and capable of rotating relative to each other. When the slip ring system is applied to CT equipment, the stationary ring structure is referred to as the stator 100, and the other ring structure is referred to as the rotor 200. The rotor 200 is positioned opposite the stator 100; specifically, the rotor 200 is located inside the stator 100, meaning it is housed in the central hole of the stator 100. Alternatively, the positions of the stator 100 and rotor 200 can be interchanged, meaning the stator 100 is located inside the rotor 200. This slip ring system can also be applied to other slip ring communication systems, such as radar and wind turbines.
[0042] The aforementioned channel 30 extends circumferentially along the stator 100, and is typically annular. The channel 30 can be circular or square; therefore, the direction of extension of the channel 30 is also referred to as the circumferential direction of the channel 30. The inner surface of the channel 30 (including the sidewalls of the stator 100 and the rotor 200) primarily serves to reflect and guide the transmission of the first signal 300; that is, the channel 30, or sub-channel, can serve as a transmission path for the first signal 300.
[0043] The first opening 301 and the second opening 302 are used to determine the positions of the signal transmitter 10 and the signal receiver 20 and to allow the first signal 300 to enter and exit the channel 30. When the signal transmitter 10 and the signal receiver 20 are located outside the channel 30, for example, the signal transmitter 10 is located on the side wall of the stator 100 and outside the first opening 301, and the signal receiver 20 is located on the side wall of the rotor 200 and outside the second opening 302, then the first signal 300 emitted by the signal transmitter 10 enters the channel 30 through the first opening 301, and the first signal 300 inside the channel 30 is emitted out of the channel 30 through the second opening 302 and received by the signal receiver 20. When the signal transmitter 10 and the signal receiver 20 are located inside the channel 30, specifically, the signal transmitter 10 and the signal receiver 20 can be located entirely inside the channel 30 at the same time. In this case, the first opening 301 and the second opening 302 need to be able to allow the corresponding signal transmitter 10 and the signal receiver 20 to pass through as a whole, or the first opening 301 and the second opening 302 are only used to allow the transmitting end of the corresponding signal transmitter 10 and the photosensitive element of the signal receiver 20 to pass through, so that the transmitting end and the photosensitive element are located inside the channel 30.
[0044] The beneficial effects of the slip ring system provided in this application are as follows: by setting the rotor 200 and stator 100 opposite to each other, a channel 30 is formed between the sidewall of stator 100 and the sidewall of rotor 200. The sidewall of stator 100 can reflect the first signal 300, that is, the inner surface of channel 30 can reflect the first signal 300. At the same time, through the first opening 301 and the second opening 302, the first signal 300 emitted by the signal transmitter 10 onto the inner surface of channel 30 is reflected in channel 30 and transmitted along the extension direction of channel 30 until it is received by signal receiver 20. Thus, the first signal 300 emitted by the signal transmitter 10 is transmitted to signal receiver 20 through channel 30. Compared with the related technology that relies on media such as light strips or optical fibers to achieve the first signal transmission, the slip ring system of this application directly transmits the signal in channel 30, which not only improves the first signal transmission efficiency and is conducive to achieving high bandwidth and high speed communication, but also has a simple structure, low installation and maintenance costs, and is compatible with existing optical modules, thus reducing the cost of slip ring system.
[0045] It should be noted that the slip rings described above can be used in medical devices, including but not limited to CT scanners. The following explanation uses the application of this slip ring system in a CT scanner as an example.
[0046] In such Figure 1The slip ring system shown in the embodiment is applied in a CT scanner. The slip ring system includes a stator 100, a rotor 200, a signal transmitter 10, and a signal receiver 20. This slip ring system also includes a sub-transmission system. The rotor 200 is disposed inside the stator 100. The outer sidewall of the rotor 200 and the inner sidewall of the stator 100 form a channel 30. The channel 30 has a first opening 301 and a second opening 302, meaning the channel 30 includes a sub-channel. The signal transmitter 10 is disposed on the stator 100 and located at the first opening 301. The signal receiver 20 is disposed on the rotor 200 and located at the second opening 302. Specifically, the signal transmitter 10 includes a transmitting end located inside the channel 30. The signal receiver 20 includes a photosensitive element (not shown in the figure) located inside the channel 30.
[0047] The aforementioned sub-channel refers to the transmission path of the first signal 300 within channel 30. One sub-channel can accommodate the transmission of the first signal 300 in one sub-transmission. When channel 30 includes only one sub-channel, unidirectional transmission of the first signal 300 is achieved. Of course, a sub-channel can also accommodate the transmission of the first signal 300 from multiple subsystems. When multiple subsystems share a single sub-channel, the parameters of the first signal 300 in each subsystem must be different. For example, when the first signal 300 is an optical signal, the aforementioned parameters can be the wavelength of the first signal 300. In other words, the wavelengths of the first signal 300 in multiple subsystems within the same sub-channel must be different.
[0048] The aforementioned transmitting end is the end of the signal transmitter 10 used to transmit the first signal 300. The transmitting end is used to emit the first signal 300.
[0049] The aforementioned photosensitive element is also called an image sensor. A photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) device. A CCD is made of a highly sensitive semiconductor material that converts light into electrical charge. A CCD is composed of many photosensitive units, typically measured in megapixels. When the surface of the photosensitive element is illuminated, each photosensitive unit reflects an electrical charge onto the component. The signals generated by all the photosensitive units are added together to form a complete image.
[0050] By placing the transmitter and the photosensitive element inside the channel 30, the first signal 300 emitted by the transmitter can enter the channel 30 completely, and the photosensitive element can also receive all or nearly all of the reflected first signal 300, thereby improving the transmission efficiency of the first signal.
[0051] The aforementioned signal transmitter 10 converts the input signal into a first signal for transmission via the drive circuit 12. The aforementioned signal receiver 20 outputs a signal via the signal conversion and amplification circuit 22.
[0052] exist Figure 1 In the slip ring system shown, the first signal 300 emitted by the signal transmitter 10 in the sub-transmission system is transmitted to the signal receiver 20 through the sub-channel, thereby realizing the unidirectional transmission of the first signal 300.
[0053] It should be noted that during the setup of the signal transmitter 10 and the signal receiver 20, at least one of the signal transmitter 10 and the signal receiver 20 may be located outside the channel 30.
[0054] like Figure 1 As shown, in this embodiment, the channel 30 can be formed as follows: the inner wall of the stator 100 and the outer wall of the rotor 200 form the channel 30, which extends circumferentially along the stator 100 in a ring shape; the inner wall of the stator 100 can reflect the first signal 300, that is, the inner wall of the stator 100 serves as the reflecting surface of the channel 30, and the first signal 300 is irradiated on the reflecting surface at a first angle. After reflection by the inner wall of the stator 100, the first signal 300 is transmitted circumferentially within the channel 30. In other words, when the first signal 300 is transmitted within the channel 30, it relies solely on the reflection of the inner wall of the stator 100 to achieve transmission along the channel 30, and does not depend on the outer wall of the rotor 200. No specific configuration is made for the outer wall of the rotor 200. The propagation path of the first signal 300 within the channel 30 is as follows: Figure 1 As shown.
[0055] In this embodiment, it is only necessary to design the inner wall of the stator 100 to be smooth. Typically, the stator 100 is made of metal, and the surface of the inner wall of the stator 100 is polished to make it smooth and mirror-like, thus forming a reflective surface, which serves to reflect the first signal 300. The outer wall of the rotor 200 can be smooth and able to reflect the first signal 300; or the outer wall of the rotor 200 can be rough and unable to reflect the first signal 300.
[0056] It should be noted that when the first signal 300 is transmitted within the channel 30 by reflection from a transmitting surface on the stator 100 side, the first signal 300 needs to illuminate the inner surface of the channel 30, i.e., the reflecting surface, at a first angle. This first angle is close to the grazing angle. When light propagates from one medium to another, an incident angle close to 90 degrees is called grazing, meaning the grazing angle is the complementary angle of the incident angle of the first signal 300 illuminating the reflecting surface of the channel 30. In this embodiment, the wavelength of the first signal 300 emitted by the signal transmitter 10 should be selected to be as close as possible to the infrared band.
[0057] With the above settings, the processing technology is relatively simple. Only the inner wall of the stator 100 needs to be processed, which simplifies the structure and process and reduces the manufacturing cost based on the transmission of the first signal 300 in the channel 30.
[0058] The reflective surface of channel 30 needs to meet certain process requirements during its fabrication. For example, the reflectivity and surface roughness requirements of this reflective surface are detailed in the relevant descriptions of the CT equipment section below.
[0059] To further improve the reflectivity of the first signal 300, a high-reflectivity film (not shown in the figure) can be provided on the reflective surface of channel 30, that is, on the inner wall of stator 100.
[0060] The aforementioned high-reflectivity coating refers to an optical thin film that enhances reflectivity. The working principle of a high-reflectivity coating is based on thin-film interference. When light shines on the thin film, it is reflected at both the upper and lower surfaces, and these two reflected beams interfere with each other. By adjusting the thickness and refractive index of the thin film, the optical path difference between these two reflected beams can be made to meet specific conditions, thereby enhancing the reflectivity in a certain wavelength band. Specifically, the design of the high-reflectivity coating ensures that the interference of the two reflected beams is additive, thus significantly improving reflectivity.
[0061] By setting a high-reflectivity film on the sidewall surface of the stator 100, the transmission efficiency of the first signal 300 is improved after it is reflected by the high-reflectivity film when it is emitted into the channel 30.
[0062] In such Figure 2 The slip ring system shown is used in CT equipment. Figure 2 The slip ring system in the illustrated embodiment and Figure 1 The main difference in the slip ring system of the illustrated embodiment lies in the placement of the signal transmitter 10 and the signal receiver 20. Figure 2The diagram only illustrates that channel 30 includes a sub-channel, and the slip ring system includes a sub-transmission system. The signal transmitter 10 in the sub-transmission system emits a first signal 300, which is an optical signal. The first signal 300 is transmitted unidirectionally within channel 30 through the sub-channel. The transmission path of the first signal 300 is shown below. Figure 2 As shown.
[0063] like Figure 2 As shown, the signal transmitter 10 is disposed on the stator 100, and the signal receiver 20 is disposed on the rotor 200. Both the signal transmitter 10 and the signal receiver 20 are located outside the channel 30. Specifically, the signal transmitter 10 is disposed on the stator 100 and is located outside the first opening 301, with the transmitting end of the signal transmitter 10 facing the first opening 301. The signal receiver 20 is disposed on the rotor 200 and is located outside the second opening 302, with the photosensitive element of the receiver facing the second opening 302. At this time, the first opening 301 is used to allow the first signal 300 emitted by the transmitting end to enter the channel 30, and the second opening 302 is used to allow the first signal 300 inside the channel 30 to exit the channel 30.
[0064] The above settings facilitate the installation of the signal transmitter 10 and the signal receiver 20, and also make it easier to adjust the incident angle of the first signal 300 emitted by the signal transmitter 10 onto the inner surface of the channel 30.
[0065] Of course, the positions of the signal transmitter 10 and the signal receiver 20 can also be interchanged. For example, the signal transmitter 10 can be located outside the second opening 302 with its transmitting end facing the second opening 302, and the signal receiver 20 can be located outside the first opening 301 with its photosensitive element facing the first opening 301. No specific limitation is made here.
[0066] like Figure 2 As shown, in this embodiment, a collimating lens 11 is provided on the light-emitting side of the signal transmitter 10. In this way, the first signal 300 forms parallel light rays after passing through the lens, which helps to increase the effective light and thus improves the signal-to-noise ratio.
[0067] like Figure 2 As shown, in some embodiments, a first lens 21 may be provided on the light-receiving side of the signal receiver 20. The first lens 21 is used to converge the light. This facilitates the convergence of the first signal 300 and its reception by the signal receiver 20, thereby improving the signal-to-noise ratio.
[0068] It should be noted that the first lens 21 can be a convex lens, or the first lens 21 can include multiple lenses, and the sum of the focal lengths of the multiple lenses is positive.
[0069] like Figure 2 As shown, in some embodiments, a filter element (not shown) may also be provided on the light-receiving side of the signal receiver 20. In this way, a specific wavelength in the first signal 300 can be selectively enhanced, thereby improving the accuracy of the transmission of the first signal 300.
[0070] Specifically, if multiple sub-transmission systems are set in a sub-channel, the structures of the multiple signal receivers 20 can be the same. In this case, a filter element of the corresponding wavelength can be set on the light-inlet side of the corresponding signal receiver 20, so that while multiple sub-transmission systems transmit signals of different wavelengths of multiple first signals 300 in the same sub-channel, the structures of the multiple signal receivers 20 are still the same.
[0071] exist Figure 2 In the illustrated embodiment, the structure of the stator 100, rotor 200, channel 30, signal transmitter 10, and signal receiver 20 is similar to... Figure 1 The slip ring systems in the illustrated embodiments have the same structure, and will not be described again here.
[0072] In such Figure 3 The slip ring system shown is used in CT equipment. Figure 3 The slip ring system in the illustrated embodiment and Figure 1 The main difference in the slip ring system of the illustrated embodiment lies in the placement of the signal transmitter 10 and the signal receiver 20.
[0073] like Figure 3 As shown, the stator 100 has a first opening 301, and the rotor 200 has a second opening 302. A signal transmitter 10 is disposed on the rotor 200 and located at the second opening 302, while a signal receiver 20 is disposed on the stator 100 and located at the first opening 301. Specifically, the signal transmitter 10 can be entirely located within the channel 30 through the second opening 302, or only the transmitting end of the signal transmitter 10 can be located within the channel 30 through the second opening 302. Similarly, the signal receiver 20 can be entirely located within the channel 30 through the first opening 301, or only the photosensitive element of the signal receiver can be located within the channel 30 through the first opening 301. That is, the signal transmitter 10 is located as shown... Figure 3 The signal receiver 20 is located inside the channel 30 shown. Figure 3 The outer side of the channel 30 shown.
[0074] The inner wall of the stator 100 and the outer wall of the rotor 200 form a channel 30. The inner wall of the stator 100 can reflect the first signal 300. That is, the inner wall of the stator 100 serves as the reflecting surface of the channel 30. The first signal 300 is incident on the reflecting surface at a first angle, thus enabling the first signal 300 to be transmitted circumferentially within the channel 30. The propagation path of the first signal 300 within the channel 30 is as follows: Figure 3 As shown.
[0075] exist Figure 3 In the illustrated embodiment, the structure of the stator 100, rotor 200, signal transmitter 10, and signal receiver 20 is similar to... Figure 1 The structures shown in the embodiments are the same and will not be described again here.
[0076] In such Figure 4 The slip ring system shown is used in CT equipment. Figure 4 The slip ring system in the illustrated embodiment and Figure 1 The main difference in the slip ring system of the illustrated embodiment lies in the structure of channel 30. Figure 4 The example shows that channel 30 includes a sub-channel, and the slip ring system includes a sub-transmission system. The signal transmitter 10 in the sub-transmission system emits a first signal 300, which is reflected by two reflective surfaces through a sub-channel to achieve unidirectional transmission of the first signal 300 within channel 30.
[0077] like Figure 4 As shown, the stator 100 has a first opening 301, the rotor 200 has a second opening 302, the signal transmitter 10 is disposed on the stator 100 and located at the first opening 301, and the signal receiver 20 is disposed on the rotor 200 and located at the second opening 302.
[0078] like Figure 4 As shown, in this embodiment, the channel 30 is formed as follows: the inner wall of the stator 100 and the outer wall of the rotor 200 form the channel 30. Both the inner wall of the stator 100 and the outer wall of the rotor 200 can reflect the first signal 300. That is, both the inner wall of the stator 100 and the outer wall of the rotor 200 can serve as reflecting surfaces of the channel 30. The first signal 300 is reflected and transmitted between the two reflecting surfaces within the channel 30, thus realizing the transmission of the first signal 300. The propagation path of the first signal 300 within the channel 30 is as follows: Figure 4 As shown.
[0079] In this embodiment, the inner sidewall of the stator 100 and the outer sidewall of the rotor 200 need to be designed to be smooth. That is, the sidewall surfaces of the stator 100 and the outer sidewall surfaces of the rotor 200 are both smoothed to make them mirror-like, thus forming two reflective surfaces. This serves to reflect the first signal 300. In other words, the first signal 300 is transmitted circumferentially in the channel 30 through the reflection of the two reflective surfaces.
[0080] When the first signal 300 is transmitted within the channel 30 by reflection from the two emitting surfaces on both sides, the angle of incidence of the first signal 300 on the inner surface of the channel 30 cannot be equal to 0.
[0081] With the above configuration, the first signal 300 can be reflected and transmitted on two oppositely positioned reflective surfaces. This increases the range of the incident angle of the first signal 300 illuminating the transmitting surface, reduces the positional accuracy requirements of the signal transmitter 10 and the signal receiver 20, and broadens the application range.
[0082] In such Figure 4 In the illustrated embodiment, the structure of the signal transmitter 10 and the signal receiver 20 is similar to... Figure 1 The structures shown in the embodiments are the same and will not be described again here.
[0083] In such Figure 5 The slip ring system shown is used in CT equipment. Figure 5 The slip ring system in the illustrated embodiment and Figure 4 The main difference in the slip ring system of the illustrated embodiment lies in the placement of the signal transmitter 10 and the signal receiver 20.
[0084] During the setup of the signal transmitter 10 and the signal receiver 20, in addition to things like Figure 4 In the illustrated embodiment, the signal transmitter 10 is disposed on the stator 100 and located at the first opening 301, and the signal receiver 20 is disposed on the rotor 200 and located outside the second opening 302. The positions of the signal transmitter 10 and the signal receiver 20 can also be interchanged. Figure 5 As shown, the signal transmitter 10 is located at the second opening 302, and the signal receiver 20 is located at the first opening 301.
[0085] exist Figure 5 In the illustrated embodiment, the structure of the stator 100, rotor 200, channel 30, signal transmitter 10, and signal receiver 20 is similar to... Figure 4 The structures shown in the embodiments are the same and will not be described again here.
[0086] In such Figure 6 The slip ring system shown is used in CT equipment. Figure 6 The structure of the slip ring system in the illustrated embodiment is related to... Figure 4 The structural diagrams shown are similar to those from the perspective shown, such as... Figure 6 The slip ring system in the illustrated embodiment is similar to... Figure 4 The main difference in the slip ring system in the illustrated embodiment is that the slip ring system includes two sub-transmission systems, and channel 30 includes two sub-channels. That is, the slip ring system includes two first openings 301, two second openings 302, two signal transmitters 10 and two signal receivers 20. Figure 6 for Figure 4 A cross-sectional view from a specific perspective.
[0087] like Figure 6 As shown, for reference Figure 4 In this embodiment, the channel 30 is provided with two first openings 301 and two second openings 302, forming two sub-channels. Each sub-channel includes a first opening 301 and a second opening 302 located on the same sub-channel. There are two signal transmitters 10 and two signal receivers 20, i.e., two sub-transmission systems. One sub-transmission system is disposed on one channel, and the two sub-channels are connected along a first direction (reference). Figure 4 and Figure 6 The arrows (X) point in the vertical direction and are arranged at intervals; the first direction is parallel to the axis of channel 30.
[0088] Through the above configuration, this slip ring system not only enables bidirectional transmission of the first signal, but also physically isolates the two sub-transmission systems by using adjacent sub-channels, reducing the risk of mutual interference between the two first signals 300 in the two sub-transmission systems and improving the transmission efficiency and accuracy of the first signal 300. This slip ring system is applicable to slip ring systems requiring bidirectional signal transmission. Additionally, it can also be used in situations such as... Figure 1 As for Figure 5 Based on the structure of the slip ring system shown, which includes only one sub-channel, the number of sub-channels is increased by adding a first opening 301 and a second opening 302 to channel 30, and the number of sub-transmission systems is increased accordingly. For example, this can be achieved by adding a signal transmitter 10 and a signal receiver 20. Figure 1 As for Figure 5 The single-signal transmission slip ring system shown can be modified into a slip ring system capable of bidirectional transmission through multiple sub-channels with minimal modification, low cost, and wide application range.
[0089] It should be noted that, in cases such as Figure 6In the illustrated embodiment, when the first signal 300 is an optical signal, the parameters, such as the wavelength, of the first signals 300 in two adjacent sub-channels can be the same or different. When the wavelengths of the two first signals 300 in the sub-transmission systems within the two sub-channels are different, that is, when the wavelengths of the first signals 300 emitted by the two signal transmitters 10 in the two sub-systems of different sub-channels are different, the risk of mutual interference between the transmission of the first signals 300 in multiple sub-channels within channel 30 is reduced, thereby further improving the transmission efficiency and accuracy of the first signal 300.
[0090] When the wavelengths of the two first signals 300 in the sub-transmission systems within the two sub-channels are different, the first signals 300 emitted by the two signal transmitters 10 will have different bands. Therefore, the corresponding two signal receivers 20 can use different photosensitive elements to receive the first signal 300 corresponding to their respective bands. Alternatively, the two signal receivers 20 can have identical structures, with a filter element disposed on the light-input side of each receiver 20. By selecting filter elements of different bands, the two signal receivers 20 can receive light of corresponding bands.
[0091] In such Figure 6 In the illustrated embodiment, the structure of the signal transmitter 10 and the signal receiver 20 is as follows: Figure 1 The structures in the embodiments are the same, and will not be described again here.
[0092] It should be noted that the number of sub-channels in a slip ring system can be, in addition to, as shown in the example below. Figure 1 As for Figure 5 One sub-channel in the illustrated embodiment, and as shown Figure 6 In addition to the two sub-channels in the illustrated embodiment, the number of sub-channels can also be three, four, five, six, etc. Correspondingly, the number of sub-transmission systems, including the number of signal transmitters 10 and signal receivers 20, also needs to be the same as or more than the number of sub-channels, and no specific limitation is made here.
[0093] To address the aforementioned issues, this application provides a CT device.
[0094] like Figure 1 As shown, in one embodiment, the CT equipment includes an examination table 2 and a gantry 1. The gantry 1 includes a stator 100, a rotor 200, a signal transmitter 10, and a signal receiver 20. That is, the gantry 1 includes a slip ring system, meaning that all components of the slip ring system belong to the CT equipment.
[0095] The stator 100 has a ring structure; the rotor 200 has a ring structure and can rotate relative to the rotor 200; the inner side wall of the ring structure of the stator 100 and the outer side wall of the ring structure of the rotor 200 are arranged opposite to each other, and the two side walls together form a channel 30.
[0096] The inner and outer walls of the aforementioned annular structure are determined based on the relative positions of the stator 100 and the rotor 200. The arrangement of the inner wall of the stator 100 annular structure and the outer wall of the rotor 200 annular structure relative to each other includes: when the rotor 200 annular structure is disposed within the stator 100 annular structure, the inner wall of the stator 100 annular structure and the outer wall of the rotor 200 annular structure together form a channel 30; when the rotor 200 annular structure is disposed outside the stator 100 annular structure, the outer wall of the stator 100 annular structure and the inner wall of the rotor 200 annular structure together form the channel 30.
[0097] The signal transmitter 10 is disposed on the stator 100 and is used to emit a first signal 300. The optical axis of the first signal 300 emitted by the signal transmitter 10 is inclined relative to the extension direction of the channel 30 so that the first signal 300 can be reflected and transmitted in the channel 30. The signal receiver 20 is disposed on the rotor 200 and is used to receive the first signal 300.
[0098] During the setup of the signal transmitter 10, the optical axis of the first light ray 300 emitted by the signal transmitter 10 needs to be aligned with the extension direction of the channel 30. The channel 30 may be, but is not limited to, annular.
[0099] For example, such as Figure 1 As shown, when the channel 30 is annular, the optical axis of the first light ray 300 is inclined relative to the circumference of the channel 30, that is, the optical axis of the first light ray 300 is inclined relative to the radial direction of the channel 30, so that the first signal 300 shines on the reflective surface of the channel 30 at a first angle, thereby enabling the first signal 300 to be reflected and transmitted in the channel 30.
[0100] It should be noted that the positions of the signal transmitter 10 and the signal receiver 20 can also be interchanged, that is, the signal transmitter 10 is set on the rotor 200 and the signal receiver 20 is set on the stator 100.
[0101] Specifically, regarding channel 300, which is the sidewall of stator 100 and the sidewall of rotor 200, in order for the first light ray 100 to be reflected and transmitted within channel 30, the sidewall of the annular structure of stator 100 and the sidewall of the annular structure of rotor 200 need to serve as reflecting surfaces, and certain process requirements need to be met during the manufacturing process.
[0102] Specifically, through multiple experiments, it was found that the reflection coefficient of the reflecting surface that can reflect the first signal 300 can be 0.8, 0.9, 1.0, 1.1, 1.2, ..., 2, 3, 10, 20, etc. The reflection coefficient of the reflecting surface needs to meet the requirement of being greater than or equal to 0.8.
[0103] The reflection coefficient mentioned above refers to the ratio of the intensity of the reflected light to the intensity of the incident light when light (incident light) is incident on an object.
[0104] Through multiple experiments, it was found that the surface roughness of the reflecting surface that can reflect the first signal 300 needs to meet the requirement of being less than or equal to 1 μm. Specifically, the distance (wavelength) between the two peaks or two troughs of the reflecting surface is less than or equal to 1 μm.
[0105] The surface roughness mentioned above refers to the unevenness of a machined surface, characterized by small gaps and minute peaks and valleys. It belongs to microscopic geometric errors. The smaller the surface roughness, the smoother the surface.
[0106] It should be noted that, as a reflecting surface capable of reflecting the first signal 300, in some embodiments, the reflection coefficient of the reflecting surface meets the requirement of being greater than or equal to 0.8, and the surface roughness of the reflecting surface needs to meet the requirement of being less than or equal to 1 μm; in other embodiments, the reflection coefficient of the reflecting surface meets the requirement of being greater than or equal to 0.8, or the surface roughness of the reflecting surface needs to meet the requirement of being less than or equal to 1 μm.
[0107] In addition, channel 30 may include a reflective surface of the side wall of stator 100, or channel 30 may include two reflective surfaces, one of the side wall of stator 100 and the other of the side wall of rotor 200, and each reflective surface needs to meet the above requirements.
[0108] In this embodiment, the beneficial effects of the slip ring system structure are the same as described above. Figures 1-6 The structure and beneficial effects are the same in any of the embodiments, and will not be described again here.
[0109] In another embodiment, the CT device includes an examination table 2 and a gantry 1. The gantry 1 includes a stator 100 and a rotor 200. The stator 100 has a ring-shaped structure. The rotor 200 has a ring-shaped structure and is rotatable relative to the stator 100. The inner wall of the ring-shaped structure of the stator 100 and the outer wall of the ring-shaped structure of the rotor 200 are disposed opposite to each other, and the two walls together form a channel 30. This channel 30 is used to realize the reflection transmission of the first signal 300 in the channel 30. That is to say, the CT device in this embodiment does not include a signal transmitter 10 and a signal receiver 20.
[0110] During the use of this CT equipment, a corresponding signal transmitter 10 and signal receiver 20 need to be additionally equipped. Furthermore, the relative positions of the signal transmitter 10 and signal receiver 20 with respect to the stator 100 and rotor 200 are as described above. Figures 1-6 The relative positions of the four components in the slip ring system of any embodiment are the same, and will not be repeated here.
[0111] It should be noted that the structure of the stator 100 and rotor 200 in this CT device is the same as described above. Figures 1-6 The stator 100 and rotor 200 in the slip ring system of any embodiment have the same structure.
[0112] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A slip ring system used in medical devices, characterized in that, The slip ring system includes: a stator (100), a rotor (200), a signal transmitter (10), and a signal receiver (20). The signal transmitter (10) is disposed on one of the stator (100) and the rotor, and the signal transmitter (10) is used to emit a first signal (300). The signal receiver (20) is disposed on the other of the stator (100) and the rotor, and the signal receiver (20) is used to receive the first signal (300). A channel (30) is formed between the sidewall of the stator (100) and the sidewall of the rotor (200). A first opening (301) is provided on the sidewall of the stator (100), and a second opening (302) is provided on the sidewall of the rotor (200). The first signal (300) emitted by the signal transmitter (10) is emitted into the interior of the channel (30) through one of the first opening (301) and the second opening (302). The signal receiver (20) is located at the other of the first opening (301) and the second opening (302). Wherein, at least the sidewall of the stator (100) is capable of reflecting the first signal (300) so that the first signal (300) is transmitted in the channel (30) along the extension direction of the channel (30) to the signal receiver (20).
2. The slip ring system according to claim 1, characterized in that, The sidewall of the stator (100) can reflect the first signal (300) so that the first signal (300) is transmitted through the sidewall of the stator (100) along the extension direction of the channel (30). Alternatively, the sidewalls of the stator (100) and the rotor (200) can reflect the first signal (300) so that the first signal (300) is transmitted along the extension direction of the channel (30) through the sidewalls of the stator (100) and the rotor (200).
3. The slip ring system according to claim 1, characterized in that, The channel (30) extends in a ring shape along the circumference of the stator (100); The slip ring system includes at least one sub-transmission system, the sub-transmission system including a signal transmitter (10) and a signal receiver (20); the channel (30) includes at least one sub-channel extending circumferentially along the channel (30), the sub-channel including a first opening (301) and a second opening (302), and at least one sub-transmission system is provided on each sub-channel so that the first signal (300) emitted by the signal transmitter (10) in the sub-transmission system is transmitted within the sub-channel to the corresponding signal receiver (20).
4. The slip ring system according to claim 3, characterized in that, When there are multiple sub-transmission systems, and some or all of the sub-transmission systems are set in one sub-channel, the parameters of the first signals emitted by the multiple signal transmitters (10) in different sub-transmission systems set in the sub-channel are not the same; or, The number of sub-transmission systems is multiple, the number of sub-channels is multiple, the multiple sub-channels are arranged at intervals along the first direction, and the multiple sub-channels are configured in one-to-one correspondence with the multiple sub-transmission systems.
5. The slip ring system according to claim 1, characterized in that, The first signal (300) is an optical signal. The light-inlet side of the optical signal receiver (20) is provided with a first lens (21), which is used to converge the light.
6. The slip ring system according to claim 1, characterized in that, The first signal (300) is an optical signal; The light-inlet side of the signal receiver (20) is provided with a filter element; And / or, the light-emitting side of the signal transmitter (10) is provided with a collimating lens (11).
7. The slip ring system according to any one of claims 1-3, characterized in that, The signal transmitter (10) and the signal receiver (20) are located outside the channel (30), with the transmitting end of the signal transmitter (10) facing one of the first opening (301) and the second opening (302), and the photosensitive element of the signal receiver (20) facing the other of the first opening (301) and the second opening (302). One of the first opening (301) and the second opening (302) is used for the first signal (300) to enter the channel (30), and the other of the first opening (301) and the second opening (302) is used for the first signal (300) in the channel (30) to exit the channel (30); Alternatively, the signal transmitter (10) includes a transmitter located within the channel (30), the transmitter being used to emit the first signal (300), the first signal (300) being an optical signal, and the signal receiver (20) includes a photosensitive element located within the channel (30).
8. A CT scanner, characterized in that, include: The stator (100) has a ring-shaped structure; The rotor (200) has a ring-shaped structure and is capable of rotating relative to the rotor (200); The inner sidewall of the stator (100) annular structure is disposed opposite to the outer sidewall of the rotor (200) annular structure, and the two sidewalls together form a channel (30). The reflection coefficients of the inner wall of the annular structure of the stator (100) and the outer wall of the annular structure of the rotor (200) are at least 0.8, so as to realize the reflection transmission of the first signal (300) in the channel (30).
9. A CT scanner, characterized in that, include: The stator (100) has a ring-shaped structure; The rotor (200) has a ring-shaped structure and is capable of rotating relative to the rotor (200); The inner sidewall of the stator (100) annular structure is disposed opposite to the outer sidewall of the rotor (200) annular structure, and the two sidewalls together form a channel (30). The surface roughness of the inner wall of the annular structure of the stator (100) and the outer wall of the annular structure of the rotor (200) is less than or equal to 1 μm, so as to realize the reflection transmission of the first signal (300) in the channel (30).
10. A CT scanner, characterized in that, include: The stator (100) has a ring-shaped structure; The rotor (200) has a ring-shaped structure and is capable of rotating relative to the rotor (200); The inner sidewall of the stator (100) annular structure is disposed opposite to the outer sidewall of the rotor (200) annular structure, and the two sidewalls together form a channel (30). A signal transmitter (10) is disposed on one of the stator (100) and the rotor (200), and the signal transmitter (10) is used to emit a first signal (300); the optical axis of the first signal (300) emitted by the signal transmitter (10) is inclined relative to the extension direction of the channel (30) so that the first signal (300) can be reflected and transmitted in the channel (30); A signal receiver (20) is disposed on the other of the stator (100) and the rotor (200), and the signal receiver (20) is used to receive the first signal (300).