A large size antenna for CT slip ring, CT slip ring, CT device

Abstract

The utility model provides a kind of for CT slip ring large size antenna, CT slip ring, CT equipment, it is related to CT technical field, to solve the technical problem of high production cost of large size antenna. The large size antenna, including signal transmission device, signal receiving device and antenna body, antenna body is formed by N antenna sections sequentially head-to-tail connection;Antenna body ring is arranged on the lateral surface of slip ring, wherein, N is the positive integer greater than or equal to 2;When N is even, the number of signal transmission device is N / 2;Every two antenna sections in N antenna sections correspond to a signal transmission device;When N is odd, the number of signal transmission device is (N+1) / 2;One antenna section in N antenna sections corresponds to a signal transmission device, and every two antenna sections in remaining antenna section correspond to a signal transmission device;Each signal transmission device is connected with signal receiving device, and each antenna section is electrically connected with corresponding signal transmission device. The antenna cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of CT technology, and in particular to a large-size antenna for CT slip ring, CT slip ring, and CT equipment. Background Technology

[0002] Computed Tomography (CT) works by using X-rays to scan an object in rotation, then reconstructing a tomographic image using a computer. A slip ring consists of a rotor and a stator. The rotor connects to the rotating structure of the equipment and rotates with it, while the stator connects to the fixed structure. The size of the slip ring varies depending on the size of the equipment being used. The antenna is a crucial component of the slip ring, located on its side, and plays a vital role in signal transmission.

[0003] In related technologies, when the slip ring is large, the antenna length is insufficient to cover the entire slip ring, requiring a custom-made antenna of appropriate length. Large-size antennas are defined as those longer than 1.2m. Customizing such large-size antennas incurs higher production costs and involves more complex technical requirements. Utility Model Content

[0004] The purpose of this invention is to provide a large-size antenna for CT slip rings, CT slip rings, and CT equipment, so as to solve the technical problem of high production cost of large-size antennas.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] In the first aspect, this utility model provides a large-size antenna for CT slip rings, including a signal transmission device, a signal receiving device, and an antenna body, wherein the antenna body is formed by N antenna segments connected end to end in sequence.

[0007] The antenna body is arranged around the circumferential side of the slip ring, where N is a positive integer greater than or equal to 2;

[0008] When N is an even number, the number of signal transmission devices is N / 2; each pair of antenna segments in the N antenna segments corresponds to one signal transmission device;

[0009] When N is an odd number, the number of signal transmission devices is (N+1) / 2; one of the N antenna segments corresponds to one signal transmission device, and every two of the remaining antenna segments correspond to one signal transmission device.

[0010] Each of the signal transmission devices is communicatively connected to the signal receiving device, and each of the antenna segments is electrically connected to the corresponding signal transmission device.

[0011] According to at least one embodiment of the present invention, each of the signal transmission devices is located at the junction of two adjacent antenna segments.

[0012] According to at least one embodiment of the present invention, the connection between each of the antenna segments satisfies a differential impedance of 100Ω for the transmission of high-frequency signals.

[0013] According to at least one embodiment of the present invention, the total length of each of the antenna segments is greater than 1.2m.

[0014] According to at least one embodiment of the present invention, a computer system is also included, wherein the signal receiving device is communicatively connected to the computer system, and the computer system is used to establish a scanned image based on the data from the signal receiving device.

[0015] Secondly, this utility model provides a CT slip ring, including the large-size antenna described in the first aspect.

[0016] According to at least one embodiment of the present invention, the slip ring includes a rotor section and a stator section, the antenna section and the signal transmission device are disposed in the rotor section, and the signal receiving device is disposed in the stator section.

[0017] According to at least one embodiment of the present invention, a plurality of annular power supply rings and signal rings are provided on the end face of the rotor portion of the slip ring, and a first base and a second base are provided on the stator portion of the slip ring.

[0018] The first base is provided with multiple power brushes and terminals, and the second base is provided with multiple signal brushes and signal interfaces. The multiple power brushes cooperate with multiple power rings to realize the transmission of electrical energy, and the multiple signal brushes cooperate with multiple signal rings to realize the transmission of signals.

[0019] According to at least one embodiment of the present invention, an encoder is further provided on the second base, and an annular grating ruler is further provided on the rotor portion of the slip ring. The encoder and the grating ruler are adapted to measure the rotational speed of the rotor portion.

[0020] Thirdly, this utility model provides a CT device, including the CT slip ring described in the second aspect.

[0021] In one or more technical solutions provided in the exemplary embodiments of this utility model, at least one of the following beneficial effects can be achieved.

[0022] This invention discloses a large-size antenna for a CT slip ring, with the antenna body encircling the circumference of the slip ring. The antenna includes a signal transmission device, a signal receiving device, and N antenna segments. Specifically, the antenna body is formed by connecting N antenna segments end-to-end to create a ring structure. Each antenna segment corresponds to one signal transmission device. When N is even, the number of signal transmission devices is N / 2; every two antenna segments correspond to one signal transmission device; when N is odd, the number of signal transmission devices is (N+1) / 2. One antenna segment corresponds to one signal transmission device, and every two antenna segments in the remaining segments correspond to one signal transmission device. Each signal transmission device is communicatively connected to the signal receiving device, and each antenna segment is electrically connected to its corresponding signal transmission device. Based on this, each signal transmission device wirelessly transmits data signals to the signal receiving device through an independent antenna segment or two electrically connected antenna segments via antenna radiation. The connections between the antenna segments via the signal transmission devices meet a differential impedance of 100Ω, which satisfies the requirements of the CT slip ring for transmitting high-frequency signals and ensures stable signal transmission.

[0023] Furthermore, compared to the prior art of customizing a complete antenna for a large-size slip ring, the large-size antenna for a CT slip ring in the exemplary embodiment of this invention divides the antenna body into N segments, reducing the length of each antenna segment to the size of commercially available antennas, thus solving the problem of high cost of custom antennas. Attached Figure Description

[0024] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0025] Figure 1 This is an isometric structural schematic diagram of a slip ring according to an embodiment of the present invention;

[0026] Figure 2 This is an isometric structural diagram of the antenna according to Embodiment 1 of this utility model;

[0027] Figure 3 This is an isometric structural diagram of the antenna according to Embodiment 2 of this utility model;

[0028] Figure 4 This is an isometric structural diagram of the antenna according to Embodiment 3 of this utility model;

[0029] Figure 5 This is an isometric structural schematic diagram of a carbon brush assembly according to an embodiment of the present invention.

[0030] Figure 6 This is an exploded structural diagram of a carbon brush assembly according to an embodiment of the present invention.

[0031] Figure label:

[0032] 111. First antenna segment; 112. Second antenna segment; 113. Third antenna segment; 114. Fourth antenna segment; 115. Fifth antenna segment; 12. Signal transmission device; 13. Signal receiving device;

[0033] 20. First base;

[0034] 30. Second base;

[0035] 40. Carbon brush assembly; 41. Knob; 42. Terminal; 43. Carbon brush head;

[0036] 51. Grating ruler; 52. Encoder. Detailed Implementation

[0037] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0038] In related technologies, slip rings are electrical components responsible for connecting and transmitting energy and signals to rotating bodies. Large-size slip ring mechanisms mainly include power brushes, signal brushes, encoders, linear encoders, and antennas, with the antenna being a critical component. When the antenna length installed on the slip ring exceeds 1.2m, a custom-made antenna is required. This not only necessitates ordering longer antenna materials but also requires modifications to the manufacturing process and production line, significantly increasing the production cost of the slip ring.

[0039] To address the aforementioned issues, the segmented slip ring antenna provided by the exemplary embodiment of this utility model reduces the length of each segment of the antenna body to accommodate existing antenna sizes on the market by dividing the slip ring antenna body. In terms of signal transmission, multiple signal transmission devices are installed at appropriate positions on the slip ring according to the number of combined segments of the antenna body, thereby reducing costs while maintaining stable signal transmission.

[0040] Example 1

[0041] Figure 1 This is an isometric structural schematic diagram of a slip ring according to an embodiment of the present invention; Figure 2 This is an isometric structural schematic diagram of the antenna according to Embodiment 1 of this utility model. Combined with... Figure 1 and Figure 2As shown, the large-size antenna for a CT slip ring provided in an exemplary embodiment of this utility model includes a signal transmission device 12, a signal receiving device 13, and an antenna body formed by N antenna segments. The antenna body is arranged around the circumferential side of the slip ring, where N is a positive integer greater than or equal to 2. The N antenna segments are arranged end to end to form the antenna body. When N is even, the number of signal transmission devices 12 is N / 2. Every two antenna segments in the N antenna segments correspond to one signal transmission device 12. When N is odd, the number of signal transmission devices 12 is (N+1) / 2. One antenna segment in the N antenna segments corresponds to one signal transmission device 12, and every two antenna segments in the remaining antenna segments correspond to one signal transmission device 12. Each signal transmission device 12 is communicatively connected to the signal receiving device 13, and each antenna segment is electrically connected to the corresponding signal transmission device 12.

[0042] In practical applications, the slip ring includes a rotor section and a stator section. The antenna segment and signal transmission device 12 are located in the rotor section, and the signal receiving device 13 is located in the stator section. The antenna body is arranged along the circumference of the rotor section of the slip ring, and each antenna segment and its corresponding signal transmission device 12 are located on the rotor section. Each signal transmission device 12 is electrically connected to one antenna segment, or electrically connected to two adjacent antenna segments. The antenna body formed by the antenna segments is used to communicate with the signal receiving device 13 on the stator section of the slip ring in a radiating manner, i.e., wirelessly, to transmit data signals. The signal receiving device 13 can then transmit the data signals to a computer system, which can convert the data signals into images to form a scanned image.

[0043] It is understood that the signal receiving device 13 can be fixedly mounted on the stator, while the signal transmission device 12 and the antenna segments rotate synchronously with the rotor. The signal transmission device 12 is used to connect with the detector array of the CT equipment, acquire data signals from the detector array, and transmit the signals to the signal receiving device 13 through each antenna segment.

[0044] In some embodiments, in the large-size antenna for CT slip rings provided by the exemplary embodiments of the present invention, each signal transmission device 12 is located at the junction of two adjacent antenna segments.

[0045] For example, such as Figure 2 As shown, when the antenna body is formed by two antenna segments, the signal transmission device 12 is located near the junction of the two antenna segments and is electrically connected to each of the two antenna segments. In this case, the two antenna segments share one signal transmission device 12. The signal transmission device 12 acquires data from the detector array of the CT equipment and transmits the signal at high speed to the signal receiving device 13 through the two antenna segments, and then the signal is handed over to the computer system of the CT equipment for image reconstruction.

[0046] In this embodiment, the electrical connection between the signal transmission device 12 and the two antenna segments ensures that the connection between each antenna segment meets the differential impedance of 100Ω, which can satisfy the stable transmission of high-frequency signals. The maximum signal transmission rate of the antenna can reach 10G / s to 15G / s.

[0047] In some embodiments, the antenna body of the large-size antenna for CT slip rings provided by the exemplary embodiments of the present invention can be longer than 1.2m, thereby adapting to large-size CT slip rings.

[0048] Depending on the actual size requirements of the CT slip ring and the sizes of commonly used antennas on the market, the lengths of the various antenna segments of the antenna body can be different or the same, and no further restrictions are imposed here. That is, the number of antenna segments that the antenna body needs to be divided into is not further limited, and their length can be reduced to the standard length or the length that is available on the market.

[0049] For example, the length of the antenna segment can be 0.1m to 1.2m, such as 0.1m, 0.2m, 0.3m, 0.4m, 0.5m, 0.6m, 0.7m, 0.8m, 0.9m, 1m, 1.1m, 1.2m or within any two of the above values.

[0050] like Figure 2 As shown, the large-size antenna for CT slip ring provided by the exemplary embodiment of the present invention includes an antenna body, a signal transmission device 12 and a signal receiving device 13, wherein the signal receiving device 13 is disposed on the stator, and the signal transmission device 12 and the antenna body are disposed on the peripheral side of the rotor.

[0051] Specifically, the antenna body is a two-section slip ring antenna, consisting of a first antenna section 111 and a second antenna section 112 connected end to end. The signal transmission device 12 is installed on the rotor of the slip ring and is located adjacent to the ends of the first antenna section 111 and the second antenna section 112, and is electrically connected to both the first antenna section 111 and the second antenna section 112.

[0052] Figure 3 This is an isometric structural diagram of the antenna according to Embodiment 2 of this utility model. Figure 3 As shown, the large-size antenna for CT slip ring provided by the exemplary embodiment of the present invention includes an antenna body, two signal transmission devices 12 and a signal receiving device 13, wherein one signal receiving device 13 is disposed on the stator, and the signal transmission devices 12 and the antenna body are disposed on the peripheral side of the rotor.

[0053] Specifically, the antenna body is a four-segment slip ring antenna, consisting of a first antenna segment 111, a second antenna segment 112, a third antenna segment 113, and a fourth antenna segment 114 connected end-to-end. One signal transmission device 12 is mounted on the rotor of the slip ring, located adjacent to the ends of the first and fourth antenna segments 111 and electrically connected to both. Another signal transmission device 12 is also mounted on the rotor of the slip ring, located adjacent to the ends of the second and third antenna segments 112 and electrically connected to both. That is, the two signal transmission devices 12 are positioned opposite each other, making signal transmission more reliable and stable.

[0054] Figure 4 This is an isometric structural diagram of the antenna according to Embodiment 3 of this utility model; as shown Figure 4 As shown, the large-size antenna for CT slip ring provided by the exemplary embodiment of the present invention includes an antenna body, three signal transmission devices 12 and one signal receiving device 13, wherein one signal receiving device 13 is disposed on the stator, and the signal transmission devices 12 and the antenna body are disposed on the peripheral side of the rotor.

[0055] Specifically, the antenna body is a five-segment slip ring antenna, consisting of a first antenna segment 111, a second antenna segment 112, a third antenna segment 113, a fourth antenna segment 114, and a fifth antenna segment 115 connected end to end in sequence. A signal transmission device 12 is disposed on the rotor of the slip ring, located adjacent to the ends of the first antenna segment 111 and the fifth antenna segment 115, and is electrically connected to both the first antenna segment 111 and the fifth antenna segment 115. Another signal transmission device 12 is disposed on the rotor of the slip ring, located adjacent to the ends of the second antenna segment 112 and the third antenna segment 113, and is electrically connected to both the second antenna segment 112 and the third antenna segment 113. A third signal transmission device 12 is located adjacent to the ends of the third antenna segment 113 and the fourth antenna segment 114, but is only electrically connected to the fourth antenna segment 114 and not to the third antenna segment 113. By arranging the three signal transmission devices 12, each antenna segment can play its corresponding signal transmission role, stably transmitting data signals wirelessly to the signal receiving device 13 of the stator section.

[0056] Example 2

[0057] An exemplary embodiment of this utility model also provides a CT slip ring, including the large-size antenna for the CT slip ring in Embodiment 1.

[0058] In some embodiments, the rotor portion of the slip ring is provided with multiple concentric annular power supply rings and signal rings on its end face, and the stator portion of the slip ring is provided with a first base 20 and a second base 30; the first base 20 is provided with multiple power brushes and terminals, and the terminals can be connected to an external power source; the second base 30 is provided with multiple signal brushes and a signal interface, and the signal interface can be connected to a signal plug of a control device; the multiple power brushes cooperate with the multiple power supply rings to realize the transmission of electrical energy, and the multiple signal brushes cooperate with the multiple signal rings to realize the transmission of signals.

[0059] In practical applications, the rotor portion (disc-shaped body) of the slip ring has multiple concentric power supply rings and signal rings with annular grooves formed on its end face. Power brushes for transmitting electrical energy and signal brushes for transmitting control signals are respectively installed on the first base 20 and the second base 30 on the stator portion. The power brushes can be carbon brush assemblies 40, and each power ring can cooperate with multiple carbon brush assemblies 40; each signal ring can also cooperate with multiple signal brushes, ensuring reliable contact performance. Through the power supply brushes and signal brushes, the slip ring delivers the operating voltage to the rotating part of the scanning carriage for use by the high-voltage generator, data acquisition system, and rotation control unit.

[0060] Figure 5 This is an isometric structural schematic diagram of the carbon brush assembly 40 according to an embodiment of the present invention. Figure 6 This is an exploded structural diagram of the carbon brush assembly 40 according to an embodiment of the present invention. (In conjunction with...) Figure 5 and Figure 6 As shown, the power brush and signal brush have the same structure. The carbon brush assembly 40 of the power brush will be used as an example for introduction.

[0061] The carbon brush assembly 40 includes a knob 41, a terminal 42, and a carbon brush head 43. The terminal 42 has a hollow, roughly square cavity. One end of the carbon brush head 43 extends out of this cavity, while the knob 41 is located at the other end of the terminal 42. In operation, the extended portion of the carbon brush head 43 is positioned in the power ring (annular groove) on the slip ring end face (the annular surface facing the first base), and the corresponding current flows through the carbon brush head 43 to form electrical contact with the power ring. The knob 41 can control the pressure of the carbon brush head 43 by changing its position on the terminal 42, compressing or releasing the spring located in the cavity of the terminal 42, thereby ensuring reliable contact between the carbon brush head 43 and the power ring. It is understood that the knob 41 can be screwed onto the terminal 42 via an internal thread, with one end of the spring abutting against the inside of the knob and the other end abutting against the carbon brush head 43.

[0062] In some implementations, such as Figure 1As shown in the exemplary embodiment of the present invention, the CT slip ring, is provided with an encoder 52 on the second base 30 and an annular grating ruler 51 on the rotor part of the slip ring. The encoder 52 and the grating ruler 51 are adapted to measure the rotational speed of the rotor part.

[0063] By combining the encoder 52 and the grating ruler 51, the rotational speed and direction of rotation of the rotor can be obtained.

[0064] Compared to existing technologies, the advantages of the CT slip ring in the exemplary embodiment of this invention are the same as those of large-size antennas, and will not be repeated here.

[0065] Example 3

[0066] An exemplary embodiment of this utility model also provides a CT device, including the CT slip ring of Embodiment 2.

[0067] Compared to existing technologies, the advantages of the CT device in the exemplary embodiment of this utility model are the same as those of the large-size antenna, and will not be repeated here.

[0068] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A large-size antenna for CT slip rings, characterized in that, Includes signal transmission device, signal receiving device, and antenna body; The antenna body is formed by connecting N antenna segments end to end in sequence; the antenna body is arranged around the circumferential side of the slip ring, where N is a positive integer greater than or equal to 2; When N is an even number, the number of signal transmission devices is N / 2; each pair of antenna segments in the N antenna segments corresponds to one signal transmission device; When N is an odd number, the number of signal transmission devices is (N+1) / 2; one of the N antenna segments corresponds to one signal transmission device, and every two of the remaining antenna segments correspond to one signal transmission device. Each of the signal transmission devices is communicatively connected to the signal receiving device, and each of the antenna segments is electrically connected to the corresponding signal transmission device.

2. The large-size antenna according to claim 1, characterized in that, Each of the signal transmission devices is located at the junction of two adjacent antenna segments.

3. The large-size antenna according to claim 1, characterized in that, The connections between the various antenna segments satisfy a differential impedance of 100Ω for high-frequency signal transmission.

4. The large-size antenna according to claim 1, characterized in that, The total length of each antenna segment is greater than 1.2m.

5. The large-size antenna according to claim 1, characterized in that, It also includes a computer system, the signal receiving device being communicatively connected to the computer system, the computer system being used to create a scanned image based on the data from the signal receiving device.

6. A CT slip ring, characterized in that, Includes the large-size antenna as described in any one of claims 1-5.

7. The CT slip ring according to claim 6, characterized in that, The slip ring includes a rotor section and a stator section, the antenna section and the signal transmission device are located in the rotor section, and the signal receiving device is located in the stator section.

8. The CT slip ring according to claim 7, characterized in that, The rotor portion of the slip ring is provided with multiple annular power supply rings and signal rings, and the stator portion of the slip ring is provided with a first base and a second base. The first base is provided with multiple power brushes and terminals, and the second base is provided with multiple signal brushes and signal interfaces. The multiple power brushes cooperate with multiple power rings to realize the transmission of electrical energy, and the multiple signal brushes cooperate with multiple signal rings to realize the transmission of signals.

9. The CT slip ring according to claim 8, characterized in that, An encoder is also provided on the second base, and an annular grating ruler is also provided on the rotor part of the slip ring. The encoder and the grating ruler are adapted to measure the rotational speed of the rotor part.

10. A CT scanner, characterized in that, Includes the CT slip ring as described in any one of claims 6-9.

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