A CT apparatus
By introducing linear limiting components and cable chain protection into CT equipment, the problem of cable pulling caused by excessive turntable rotation is solved, improving the safety and reliability of the equipment and ensuring the stability of the turntable and imaging quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI YIDU VIDEO IMAGING TECHNOLOGY CO LTD
- Filing Date
- 2025-03-17
- Publication Date
- 2026-07-24
Smart Images
Figure CN224540230U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of imaging equipment technology, and specifically relates to a CT device. Background Technology
[0002] CT scanners are important imaging devices widely used in non-destructive testing, clinical diagnosis, and other technical fields. The working principle of a CT scanner is to transmit X-rays emitted from a radiation source through the object being tested, such as a workpiece or human body, and then receive the attenuated X-rays through a detector. Based on these attenuated X-rays, an internal image of the object is constructed.
[0003] In practical applications, to achieve three-dimensional internal imaging of the object under test, the X-ray source and detector need to rotate around the object to perform a rotational scan. During this process, the rotational range of the X-ray source and detector needs to be limited to prevent cable traction issues caused by exceeding the range of motion, which could affect the operational safety and reliability of the CT equipment. Utility Model Content
[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a CT device that can limit the rotation stroke of the CT device at low cost, so as to ensure the safety and reliability of the CT device rotation scanning.
[0005] To achieve the above and other related objectives, this utility model provides a CT device, including a frame and a turntable rotatably mounted on the frame; a radiation source and a detector are arranged opposite each other in the radial direction of the turntable, and the cables of the radiation source and the detector are connected to a control box on the frame; the CT device further includes a linear limiting assembly, which includes a linear slide rail, a travel sensing rod, and a sensor switch; the travel sensing rod is slidably mounted on the linear slide rail, and the turntable is provided with a lever for driving the travel sensing rod to slide along the linear slide rail.
[0006] Preferably, the inductive switch is a ranging sensor.
[0007] Preferably, the inductive switch includes a first inductive switch and a second inductive switch spaced apart; the travel sensing rod slides between the first inductive switch and the second inductive switch.
[0008] Preferably, the cable is routed via a cable chain; one end of the cable chain is connected to the frame, and the other end of the cable chain is connected to the turntable.
[0009] Preferably, the CT device includes a first moving mechanism and / or a second moving mechanism; the first moving mechanism is used to adjust the radial position of the X-ray source on the turntable, and the second moving mechanism is used to adjust the radial position of the detector on the turntable.
[0010] Preferably, the turntable is provided with a first position detector and / or a second position detector; the first position detector is used to identify the radial position of the radiation source, and the second position detector is used to identify the radial position of the detector.
[0011] Preferably, the radiation source is mounted on the turntable via a radiation source mounting bracket, and the detector is mounted on the turntable via a detector mounting bracket; adjusting the radiation source mounting bracket and / or the detector mounting bracket can align the radiation source and the detector.
[0012] Preferably, a dynamic balance adjustment block is detachably fixed on the turntable.
[0013] Preferably, the frame is provided with a turntable drive device for driving the turntable to rotate, the turntable drive device includes a rotary drive component and a power transmission mechanism; the rotary drive component is connected to the turntable through the power transmission mechanism.
[0014] Preferably, the power transmission mechanism is a synchronous belt drive mechanism, a synchronous chain drive mechanism, or a gear drive mechanism.
[0015] As described above, the CT device of this utility model has the following beneficial effects:
[0016] The CT equipment provided in this application can convert the rotational motion of the turntable into the linear motion of the travel sensor rod through the cooperation of the lever and the travel sensor rod. By using an inductive switch to detect the limit position of the travel sensor rod, the limit detection during the rotational motion of the turntable is realized. This solves the cable pulling problem caused by excessive turntable rotation in the prior art at a low cost, and improves the operational safety and reliability of the CT equipment. In addition, the setting of the dynamic balance adjustment block facilitates the stability of the turntable rotation and avoids problems such as blurred imaging caused by rotational imbalance. Attached Figure Description
[0017] Figure 1 This is a three-dimensional view of the CT equipment involved in this application.
[0018] Figure 2 This is a front view of a CT scanner.
[0019] Figure 3 This is a rear view of a CT scanner.
[0020] Figure 4 This is a schematic diagram of the interaction between the linear limiting component and the lever in one embodiment.
[0021] Figure 5 This is a schematic diagram showing the fit between the X-ray source mounting bracket and the first support plate.
[0022] Figure 6 This is a schematic diagram showing the fit between the detector mounting bracket and the second support plate.
[0023] Explanation of reference numerals in the attached figures
[0024] The system includes: frame 110, turntable 120, first support plate 121, second support plate 122, dynamic balance adjustment block 123, lever 124, radiation source 200, detector 300, drag chain 400, turntable drive device 500, drive pulley 510, synchronous belt 520, rotary drive component 530, tension wheel 540, radiation source mounting bracket 600, first moving plate 610, radiation source mounting plate 620, side plate 630, lateral limiting component 631, first reinforcing plate 640, detector mounting bracket 700, second moving plate 710, adapter plate 720, detector mounting plate 730, linear limiting assembly 800, linear slide rail 810, travel sensing rod 820, first sensing switch 830, second sensing switch 840, and control box 900. Detailed Implementation
[0025] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0026] Please see Figures 1 to 6 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.
[0027] This application provides a CT device applicable to various technical fields such as non-destructive testing of workpieces and clinical diagnosis, which can perform rotational scanning of the object being tested; such as Figure 1 As shown, the CT equipment includes a gantry 110, a turntable 120, an X-ray source 200, a detector 300, and a control box 900. The turntable 120 is rotatably mounted on the gantry 110. The X-ray source 200 and the detector 300 are arranged opposite each other on the turntable 120 along the radial direction, and a scanning space for accommodating the object being measured is formed between the X-ray source 200 and the detector 300. In addition, the cables of the X-ray source 200 and the detector 300 are connected to the control box 900 to realize power supply and communication functions.
[0028] Thus, as the turntable 120 rotates, the X-rays emitted by the X-ray source 200 can penetrate the object being tested in the scanning space and then irradiate the detector 300 to construct a three-dimensional image of the object's interior.
[0029] For ease of description, in the following embodiments, the axial direction of the turntable 120 is defined as the first direction, the radial direction of the turntable parallel to the emission direction of the X-ray source 200 is defined as the second direction, and the direction perpendicular to both the first and second directions is defined as the third direction.
[0030] In practical applications, since the control box 900 and the frame 110 are relatively fixed and the cable length is limited, in order to ensure the operational safety and reliability of the CT equipment, the turntable 120 should be restricted to rotate within a preset angle range to avoid the cable being pulled and failing.
[0031] It should be noted that the preset angle range of the turntable 120 needs to be greater than 360°. In this embodiment, the preset angle range of the turntable 120 is 380°. At this time, the two extreme rotational positions of the turntable 120 are at -10° and 370° respectively.
[0032] To limit the rotational travel of turntable 120, such as Figure 2 and Figure 4 As shown, a linear limiting assembly 800 is installed on the frame 110. The linear limiting assembly 800 includes a linear slide rail 810, a travel sensing rod 820, and a sensor switch that cooperates with the travel sensing rod 820. The travel sensing rod 820 is slidably mounted on the linear slide rail 810, and the turntable 120 is provided with a lever 124 for switching the travel sensing rod 820 between a first limit position and a second limit position. The sensor switch is used to detect whether the travel sensing rod 820 is in the first limit position or the second limit position. In this way, the detection of the limit position of the travel sensing rod 820 by the sensor switch can be converted into the detection of the start and end positions of the turntable 210 rotation, which has the advantages of simple structure and low cost.
[0033] To facilitate understanding, the principle of the start and end position detection of turntable 210 will be explained below.
[0034] When the turntable 210 is at the starting point of rotation, the travel sensing rod 820 is at the first limit position (i.e. Figure 4 In the middle, at the right end of the linear slide rail 810), the lever 124 is located on the side of the travel sensing rod 820 near the second limit position (i.e., the lever 124 is located on the left side of the travel sensing rod 820); when the turntable 120 rotates clockwise from the starting point (i.e. along the... Figure 4When the turntable 120 rotates clockwise, the lever 124 will first rotate to the side of the travel sensing rod 820 away from the second limit position (that is, the lever 124 rotates approximately one full turn to the right side of the travel sensing rod 820). During this process, the position of the travel sensing rod 820 remains unchanged, and the sensing signal of the induction switch does not change. As the turntable 120 continues to rotate clockwise, the lever 124 will push the travel sensing rod 820 to slide on the linear slide rail 810 until the induction switch detects that the travel sensing rod 820 has reached the second limit position. At this point, the turntable 120 has rotated to the end position of the rotation and cannot continue to rotate clockwise. When the turntable 120... When rotating in the reverse direction from the end point, the lever 124 will first rotate to the side of the travel sensing rod 820 near the first limit position. During this process, the position of the travel sensing rod 820 remains unchanged, and the sensing signal of the induction switch does not change. As the turntable 120 continues to rotate in reverse, the lever 124 will push the travel sensing rod 820 to slide on the linear slide rail 810 until the induction switch detects that the travel sensing rod 820 has reached the first limit position. At this time, the turntable 120 rotates to the starting position and cannot continue to rotate in reverse. In this way, the mechanical limiting of the start and end positions of the turntable 120 within a 380° range can be completed at low cost.
[0035] It is understood that the types and number of inductive switches include, but are not limited to, the following:
[0036] Format 1:
[0037] There is one inductive switch, and the inductive switch can be a laser rangefinder, infrared rangefinder, or other rangefinder sensors.
[0038] Form Two:
[0039] There are two inductive switches, which are spaced apart; the inductive switches are various ranging sensors such as laser ranging sensors or infrared ranging sensors.
[0040] Since there are two inductive switches, the other inductive switch can be used for detection when one of them fails, ensuring the reliability of the CT equipment.
[0041] Form 3:
[0042] The inductive switch includes a first inductive switch 830 and a second inductive switch 840 spaced apart, and a travel sensing rod 820 slides between the first inductive switch 830 and the second inductive switch 840. The first inductive switch 830 and the second inductive switch 840 are proximity switches or photoelectric switches.
[0043] Optionally, such as Figure 2As shown, the cable is routed via a cable chain 400; one end of the cable chain 400 is connected to the rack 110, and the other end is connected to the turntable 120; the cable chain 400 allows for cable management and protection, improving the overall aesthetics.
[0044] It should be noted that the turntable 120 in the aforementioned CT equipment can be rotated manually or automatically; to improve scanning efficiency, such as Figure 2 and Figure 3 As shown, in this embodiment, a turntable drive device 500 for driving the turntable 120 to rotate is preferably provided on the frame 110. The turntable drive device 500 includes a rotary drive component 530 and a power transmission mechanism. The rotary drive component 530 is connected to the turntable 120 through the power transmission mechanism to realize the automatic rotation of the turntable 120.
[0045] It is understood that the power transmission mechanism includes, but is not limited to, a synchronous belt drive mechanism, a synchronous chain drive mechanism, or a gear drive mechanism; in this embodiment, the power transmission mechanism is a synchronous belt drive mechanism, and its structure is as follows: Figure 3 As shown, it includes a drive pulley 510 and a synchronous belt 520 sleeved on the drive pulley 510 and the turntable 120. The drive pulley 510 is mounted on a rotary drive component 530. The rotary drive component 530 is a rotary motor or a combination of a rotary motor and a reducer.
[0046] Since both the radiation source 200 and the detector 300 are mounted on the turntable 120 and rotate together with it; to ensure the installation stability of the radiation source 200 and the detector 300, such as Figure 2 As shown, the turntable 120 is provided with a first support plate 121 and a second support plate 122, and the X-ray source 200 is mounted on the first support plate 121 through the X-ray source mounting bracket 600, and the detector 300 is mounted on the second support plate 122 through the detector mounting bracket 700.
[0047] In order to facilitate scanning imaging of objects of different sizes, CT equipment needs to have a magnification ratio adjustment function.
[0048] To enable flexible adjustment of the magnification ratio, the second directional position of the X-ray source mounting bracket 600 and / or the detector mounting bracket 700 on the corresponding support plate is adjustable (i.e., the radial position on the turntable 120 is adjustable).
[0049] Specifically, such as Figure 5 and Figure 6 As shown, the CT equipment includes a first moving mechanism and / or a second moving mechanism; wherein, the first moving mechanism is mounted on a first support plate 121 and is used to adjust the radial position of the X-ray source 200 on the turntable 120; the second moving mechanism is mounted on a second support plate 122 and is used to adjust the radial position of the detector 300 on the turntable 120.
[0050] It is understood that the first and second moving mechanisms can adopt automatic adjustment mechanisms such as cylinders, electric push rods, and motor screws, or manual adjustment mechanisms such as crank screws; there is no limitation on this.
[0051] In order to reduce costs, such as Figure 5 As shown, the X-ray source mounting bracket 600 includes a first movable plate 610; the first movable plate 610 is mounted on the first support plate 121 by a first adjusting bolt, and the first movable plate 610 is provided with a first guide groove extending in a second direction; thus, the bolt rod of the first adjusting bolt can pass through the first guide groove and be threadedly connected to the first support plate 121, thereby adjusting and locking the position of the first movable plate 610 in the second direction, thereby realizing the adjustment of the magnification ratio; in this embodiment, in order to ensure the stability of the position adjustment of the first movable plate 610, the first movable plate 610 is slidably mounted on the first support plate 121 by a guide sliding structure extending in the second direction.
[0052] Similarly, such as Figure 6 As shown, the detector mounting bracket 700 includes a second movable plate 710; the second movable plate 710 is mounted on the second support plate 122 by a second adjusting bolt, and the second movable plate 710 is provided with a second guide groove extending in a second direction; thus, the bolt rod of the second adjusting bolt can pass through the second guide groove and be threadedly connected to the second support plate 122, thereby adjusting and locking the position of the second movable plate 710 in the second direction, thereby realizing the adjustment of the magnification ratio; in this embodiment, in order to ensure the stability of the position adjustment of the second movable plate 710, the second movable plate 710 is slidably mounted on the second support plate 122 by a guide sliding structure extending in the second direction.
[0053] In an optional embodiment, a first position detector and a second position detector are provided on the turntable 12; wherein, the first position detector is used to identify the position of the radiation source 200 in the second direction, and the second position detector is used to identify the position of the detector 300 in the second direction; in this way, the positions of the radiation source 200 and the detector 300 in the second direction can be identified by the first position detector and the second position detector, so as to achieve accurate adjustment of the amplification ratio; in this embodiment, the first position detector and the second position detector are various position detection sensors such as laser rangefinders, photoelectric sensors, or scale lines.
[0054] Because the sizes of different models of radiation sources 200 and detectors 300 vary, in order to meet the requirements
[0055] Since different models of X-ray sources 200 and detectors 300 have different sizes, in order to meet the alignment and installation requirements of different models of X-ray sources 200 and detectors 300, the X-ray source mounting bracket 600 needs to be able to adjust the position of the X-ray source 200 in the first direction and / or the third direction (i.e., the axial and / or tangential position is adjustable); the detector mounting bracket 700 needs to be able to adjust the position of the detector 300 in the first direction and / or the third direction (i.e., the axial and / or tangential position is adjustable).
[0056] Specifically, such as Figure 5 As shown, the X-ray source mounting bracket 600 includes a X-ray source mounting plate 620 that is perpendicularly connected to the first movable plate 610, and the X-ray source 200 is mounted on the X-ray source mounting plate 620 by a third bolt; wherein, the X-ray source mounting plate 620 is provided with a third sliding groove extending along a third direction (i.e., the tangential direction), and the bolt shank of the third bolt passes through the third sliding groove and is threadedly connected to the X-ray source mounting plate 620 to adjust and lock the position of the X-ray source 200 in the third direction.
[0057] It should be noted that, in order to enable flexible installation of the X-ray source 200 at 0° and 90° positions, there are 4 first bolts, and the 4 first bolts are symmetrically distributed about the emission center line of the X-ray source 200.
[0058] In addition, in order to ensure the connection stability between the X-ray source mounting plate 620 and the first movable plate 610, the X-ray source mounting plate 620 is provided with side plates 630 on both sides in the third direction, which are perpendicularly connected to the first movable plate 610, and the two side plates 630 away from the first movable plate 610 are reinforcedly connected by the first reinforcing plate 640; in this way, the X-ray source mounting frame 600 can form a stable mounting frame structure.
[0059] Furthermore, to ensure the stability of the connection between the radiation source 200 and the radiation source mounting bracket 600, such as... Figure 5 As shown, two lateral limiting members 631 are provided opposite to each other on the two side plates 630; the lateral limiting members 631 are adjustable in the third direction, and the two lateral limiting members 631 cooperate to clamp the radiation source 200 installed on the radiation source mounting plate 620 to ensure the installation stability of the radiation source 200.
[0060] It should be noted that the lateral limiting member 631 is a fine-adjusting bolt threaded onto the corresponding side plate, or the lateral limiting member 631 is a lateral limiting block installed on the corresponding side plate by an adjusting bolt; there is no limitation on which one.
[0061] like Figure 6As shown, the detector mounting bracket 700 includes a transition plate 720 perpendicularly connected to the second movable plate 710. The transition plate 720 is provided with a detector mounting plate 730, which is used to mount the detector 300. The detector mounting plate 730 on the transition plate 720 has an adjustable first directional position (i.e., axial position) and the detector 300 on the detector mounting plate 730 has an adjustable third directional position (i.e., tangential position), which facilitates the adjustment of the axial and tangential positions of the detector 300, thereby facilitating the alignment and installation of the detector 300 with the radiation source 200.
[0062] To ensure the rotational stability of turntable 120, such as Figure 2 As shown, a dynamic balance adjustment block 223 is detachably fixed on the turntable 120 to meet the rotational dynamic balance requirements of the X-ray source 200 and the detector 300 under different models, and to ensure the smoothness of rotation.
[0063] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.
[0064] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A CT scanner, comprising a gantry (110) and a turntable (120) rotatably mounted on the gantry (110); a radiation source (200) and a detector (300) are radially disposed opposite each other on the turntable (120), and cables of the radiation source (200) and the detector (300) are connected to a control box (900) on the gantry (110); characterized in that, The CT device also includes a linear limiting assembly (800), which includes a linear slide rail (810), a travel sensing rod (820), and a sensor switch. The travel sensing rod (820) is slidably mounted on the linear slide rail (810), and the turntable (120) is provided with a lever (124) for driving the travel sensing rod (820) to slide along the linear slide rail (810).
2. The CT equipment according to claim 1, characterized in that, The inductive switch is a distance measuring sensor.
3. The CT equipment according to claim 1, characterized in that, The inductive switch includes a first inductive switch (830) and a second inductive switch (840) spaced apart; the travel sensing rod (820) slides between the first inductive switch (830) and the second inductive switch (840).
4. The CT device according to any one of claims 1 to 3, characterized in that, The cable is routed via a cable chain (400); one end of the cable chain (400) is connected to the frame (110), and the other end of the cable chain (400) is connected to the turntable (120).
5. The CT device according to any one of claims 1 to 3, characterized in that, The CT device includes a first moving mechanism and / or a second moving mechanism; the first moving mechanism is used to adjust the radial position of the X-ray source (200) on the turntable (120), and the second moving mechanism is used to adjust the radial position of the detector (300) on the turntable (120).
6. The CT device according to claim 5, characterized in that, The turntable (120) is provided with a first position detector and / or a second position detector; the first position detector is used to identify the radial position of the radiation source (200), and the second position detector is used to identify the radial position of the detector (300).
7. The CT device according to claim 1, characterized in that, The radiation source (200) is mounted on the turntable (120) via a radiation source mounting bracket (600), and the detector (300) is mounted on the turntable (120) via a detector mounting bracket (700); by adjusting the radiation source mounting bracket (600) and / or the detector mounting bracket (700), the radiation source (200) and the detector (300) can be aligned.
8. The CT equipment according to claim 1, characterized in that, A dynamic balance adjustment block (223) is detachably fixed on the turntable (120).
9. The CT device according to claim 1, characterized in that, The frame (110) is provided with a turntable drive device (500) for driving the turntable (120) to rotate. The turntable drive device (500) includes a rotary drive component (530) and a power transmission mechanism. The rotary drive component (530) is connected to the turntable (120) through the power transmission mechanism.
10. The CT device according to claim 9, characterized in that, The power transmission mechanism is a synchronous belt drive mechanism, a synchronous chain drive mechanism, or a gear drive mechanism.