A Method and Device for Suppressing the Vibration of a CT Scan Table

Abstract

This application relates to the technical field of CT scanning bed plates. A method for suppressing the vibration of a CT scanning bed plate includes obtaining a state signal according to the target position information of the bed plate; applying a downward pressure to one end of the bed plate according to the state signal, where one end of the bed plate refers to the end far from the end where the bed plate is connected to the bed frame movement mechanism; suppressing the vertical vibration of the bed plate according to the downward pressure. The relative vibration formed by the movement of the bed plate is suppressed, the vibration amplitude of the bed plate at the scanning plane is reduced, the scanning quality is improved, and the comfort of the patient can be improved.

Description

Technical Field

[0001] This application relates to the technical field of CT scanning bed plates, and in particular to a method and device for suppressing the vibration of CT scanning bed plates. Background Art

[0002] Current CT systems require the cooperation of a scanning bed and a host. Patients lie on the bed plate of the scanning bed, and the scanning bed sends the patient into the host hole to complete the scanning of the corresponding part. Due to the principle of CT tomography, which is to splice images layer by layer, when scanning the head or a small area, if the bed plate is still vibrating in the scanning plane at the start of scanning, an effective image cannot be spliced, resulting in poor image quality. Currently, on the market, the bed plate of CT equipment is connected to the motion mechanism on the bed frame at the tail. The bed plate with a large load demand needs to be supported by rollers at the front end of the horizontal bed frame to prevent the deformation of the front end of the bed plate from affecting the quality of tomographic scanning images.

[0003] The horizontal movement of the scanning bed mostly uses ball screws or belt drives. The mounting bracket of the bed plate is connected to the transmission mechanism. Rollers are arranged at the front end of the horizontal bed frame to support the bed plate. The surface of the fixed roller assembly is in line contact with the bottom surface of the bed plate, which can only limit the degree of freedom of the bed plate to deform downward. When the scanning bed starts, stops, accelerates, decelerates, or undergoes other variable-speed motions, the bed plate is in a cantilever state and will vibrate up and down, affecting the quality of the scanning image and resulting in the inability to accurately diagnose the lesion area. Summary of the Invention

[0004] A device for suppressing the vibration of a CT scanning bed plate provided by this application can solve the problem that when the bed plate undergoes variable-speed motions such as starting, stopping, accelerating, and decelerating, the bed plate is in a cantilever state and will vibrate up and down, affecting the quality of the scanning image.

[0005] The first aspect of this application provides a method for suppressing the vibration of a CT scanning bed plate, including:

[0006] Obtaining a status number according to the target position information of the bed plate;

[0007] Applying a downward pressure to one end of the bed plate according to the status signal number, where one end of the bed plate refers to the end far from the end where the bed plate is connected to the bed frame motion mechanism;

[0008] Suppressing the vertical vibration of the bed plate according to the downward pressure.

[0009] The second aspect of this application provides a device for suppressing the vibration of a CT scanning bed plate, including:

[0010] A bed frame on which a bed plate that can slide relative to it is provided;

[0011] A bed plate, at the bottom of which a strip-shaped through groove is arranged along its length direction, and the bottom surface of the strip-shaped through groove is a bottom plate;

[0012] A fixed roller assembly is connected to the bed frame, at least partially protrudes from the top surface of the bed frame, and fits against the bottom surface of the bottom plate;

[0013] A swing roller assembly is connected to the bed frame, at least partially protrudes from the top surface of the bed frame, the swing roller assembly is inserted into the strip-shaped through groove, and is spaced from the bottom plate by a preset distance; wherein,

[0014] The swing roller assembly and the fixed roller assembly are arranged at intervals so that the swing roller and the fixed roller assembly clamp the bottom plate. When the bed board moves at a variable speed in the length direction, the swing roller assembly is adjusted to make the swing roller assembly and the fixed roller assembly come into contact, generating a downward pressure on the bottom plate, so that the bottom plate fits against the swing roller assembly and the fixed roller assembly respectively, suppressing the vertical vibration of the bed board.

[0015] In some implementable ways, the fixed roller assembly includes:

[0016] A first support member is arranged on the bed frame and is located at one end far from the transmission mechanism where the bed frame is connected to the bed board;

[0017] A fixed roller is connected to the first support member. Under the support of the first support member, the fixed roller at least partially protrudes from the top surface of the bed frame and fits against the bottom surface of the bed frame; wherein,

[0018] The fixed roller is located below the bottom plate to limit the downward swing of the bed board.

[0019] In some implementable ways, the swing roller assembly includes:

[0020] A second support member is arranged on the bed frame and is located at one end far from the transmission mechanism where the bed frame is connected to the bed board;

[0021] An arm is connected to the second support member;

[0022] A swing roller is connected to the arm. The swing roller at least partially protrudes from the top surface of the bed frame and is spaced from the bottom plate of the strip-shaped through groove by a preset distance; wherein,

[0023] The arm is used to support and limit the swing roller. The swing roller is placed in the strip-shaped through groove to limit the upward swing of the bed board.

[0024] In some implementable ways, the swing arm includes a first swing arm and a second swing arm. One ends of the first swing arm and the second swing arm are respectively and correspondingly connected to the second support member, and the other ends are respectively and correspondingly rotatably connected to both ends of the swing roller.

[0025] In some implementable ways, the second support member includes a double-output shaft motor;

[0026] The outer wall of the double-output shaft motor is connected to the bed frame. Among the two shafts, one shaft is connected to the first swing arm and the other shaft is connected to the second swing arm, so that when the double-output shaft motor is in operation, it drives the first swing arm and the second swing arm to rotate, and adjusts the distance between the fixed roller assembly and the swing roller.

[0027] In some implementable ways, the second support member further includes a fixed housing;

[0028] The double-output shaft motor is arranged in the fixed housing. Through holes are provided on opposite sides of the fixed housing along the width direction of the bed frame, so that the double output shafts of the double-output shaft motor respectively pass through the through holes and are connected to the first swing arm and the second swing arm.

[0029] In some implementable ways, a control system is further included. The control system is connected to the double-output shaft motor. The control system sends a status signal to the double-output shaft motor, and the double-output shaft motor acts in response to the status signal, so as to adjust the first swing arm and the second swing arm, and make the swing roller connected to the first swing arm and the second swing arm move downward to apply a downward pressure to the bottom plate.

[0030] In some implementable ways, the circumferential wall of the fixed roller is made of nylon, polytetrafluoroethylene or rubber material.

[0031] In some implementable ways, the swing roller is made of rubber material.

[0032] Advantages of this application:

[0033] A method and device for suppressing the vibration of a CT scanning bedplate, obtaining a state signal according to the target position information of the bedplate; applying a downward pressure to one end of the bedplate according to the state signal, where one end of the bedplate refers to the end far from the end where the bedplate is connected to the bedframe movement mechanism; suppressing the vertical vibration of the bedplate according to the downward pressure. In addition, a bedplate that slides relative to the bedframe is provided on the bedframe, and a fixed roller assembly and a swing roller assembly are provided at one end of the bedframe, and both the fixed roller assembly and the swing roller assembly at least partially protrude from the top surface of the bedframe, so that the fixed roller is placed at the bottom of the bedplate to assist the bedplate to move in the length direction. When the bedframe makes a variable-speed movement, the swing roller assembly generates a downward pressure on the bottom plate, so that the bottom plate fits with the swing roller assembly and the fixed roller assembly respectively, suppressing the vertical vibration of the bedplate. That is to say, the relative vibration formed by the movement of the bedplate by the swing roller assembly and the fixed roller assembly is suppressed, the vibration amplitude of the bedplate at the scanning plane is reduced, the scanning quality is improved, and the comfort of the patient can be improved. Description of the Drawings

[0034] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 Structural schematic diagram of a device for suppressing the vibration of a CT scanning bedplate according to the present application;

[0036] Figure 2 Structural schematic diagram of the fixed roller assembly and the swing roller assembly of a device for suppressing the vibration of a CT scanning bedplate according to the present application;

[0037] Figure 3 Structural schematic diagram of the bedplate of a device for suppressing the vibration of a CT scanning bedplate according to the present application;

[0038] Figure 4 For Figure 1 Cross-sectional view;

[0039] Figure 5 Schematic diagram of the rotation of the second support member of a device for suppressing the vibration of a CT scanning bedplate according to the present application;

[0040] Figure 6 Principle diagram of the rotation of the second support member of a device for suppressing the vibration of a CT scanning bedplate according to the present application.

[0041] Explanation of the reference numerals in the drawings:

[0042] 1. Bed frame; 2. Bed board; 21. Strip-shaped through groove; 22. Bottom plate; 3. Fixed roller assembly; 31. Fixed roller; 32. First support member; 4. Swing roller assembly; 41. Second support member; 42. Swing arm; 43. Swing roller; 5. Motion mechanism. Detailed implementation manners

[0043] The technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0044] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined. In addition, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0046] The first aspect of the present application provides a method for suppressing the vibration of a CT scanning bed board, including:

[0047] Obtaining a sum state signal according to the target position information of the bed board;

[0048] Applying a downward pressure to one end of the bed board according to the state signal.

[0049] Wherein, one end of the bed board refers to the end far from the end where the bed board is connected to the motion mechanism of the bed frame;

[0050] Suppress the vertical vibration of the bed board according to the downward pressure.

[0051] Among them, the target position information of the bed board represents the information formed after the bed board moves into place. This information can be preset by the control system. Exemplarily, according to the CT scan of the patient, the patient's height information and the position where the patient needs to be CT scanned are obtained to determine the distance that the bed board moves. According to the distance that the bed board moves, the target position information of the bed board is formed.

[0052] In this way, when the bed board reaches the target position during actual work, a status signal is formed according to the target position information. The status signal can be a feedback signal. That is to say, when the bed board reaches the target position, a feedback signal will be formed to the control system. The control system will, according to the feedback signal, use a corresponding device to apply a downward pressure to one end of the bed board. Under the action of the downward pressure, the bed board quickly stops vibrating, so as to save the waiting time of the doctor and improve work efficiency.

[0053] As Figures 1 to 6 shown, based on a method for suppressing the vibration of a CT scan bed board, the second aspect of the present application provides a device for suppressing the vibration of a CT scan bed board, including a bed frame 1, a bed board 2, a fixed roller assembly 3 and a swing roller assembly 4.

[0054] Among them, the bed frame 1 is the bed frame 1 of an existing CT scan bed. A bed board 2 that can slide relative to it is arranged on the bed frame 1. Specifically, a conventional motion mechanism 5, such as a roller, is arranged on the bed frame 1. The bed frame 1 can realize the relative movement with the bed board 2 by using the roller.

[0055] A strip-shaped through groove 21 is arranged at the bottom of the bed board 2 along its length direction, and the bottom surface of the strip-shaped through groove 21 is a bottom plate 22. Specifically, the top of the bed board 2 is an arc-shaped structure. Correspondingly, the top surface in the strip-shaped through groove 21 can also be a curved surface, which can be specifically set according to needs. In addition, the length of the strip-shaped through groove 21 can be determined according to the relative movement distance between the bed board 2 and the bed frame 1. Exemplarily, except for the motion mechanism 5 between the bed frame 1 and the bed board 2, the strip-shaped through groove 21 can be arranged on the bed board 2. Specifically, the open ends of the strip-shaped through groove 21 are respectively located on the side surfaces in the width direction of the bottom plate 22, that is to say, the opening direction of the strip-shaped through groove 21 is perpendicular to the width direction of the bed board 2.

[0056] It should be noted that, in order to facilitate the cooperation between the bed board 2 and the fixed roller assembly 3 and the swing roller assembly 4, the upper and lower surfaces of the bottom plate 22 of the bed board 2 are parallel, that is to say, the bottom plate 22 is a plate-shaped structure.

[0057] The fixed roller assembly 3 is connected to the bed frame 1 and at least partially protrudes from the top surface of the bed frame 1 and fits with the bottom surface of the bottom plate 22.

[0058] Specifically, the fixed roller assembly 3 includes a first support member 32 and a fixed roller 31. The first support member 32 is arranged on the bed frame 1 and is located at one end of the transmission mechanism that is far away from the bed frame 1 and the bed board 2; the fixed roller 31 is connected to the first support member 32, and the fixed roller 31 is supported by the first support member 32, at least partially protrudes from the top surface of the bed frame 1, and fits with the bottom surface of the bed frame 1; the fixed roller 31 is located below the bottom board 22 to limit the downward swing of the bed board 2.

[0059] It should be noted that the first support members 32 are separated on both sides of the fixed roller 31, and one end of the two first support members 32 is connected to the front end face of the bed frame 1 (for ease of understanding, the end of the bed frame 1 provided with the motion mechanism 5 is the rear end and the other end is the front end), so as to fix the first support members 32, and the ends of the two first support members 32 away from the front end face of the bed frame 1 are respectively connected to the two ends of the fixed roller 31, so as to fix the fixed roller 31, so that when the bed board 2 is overlapped on the fixed roller 31, when the bed board 2 moves relative to the bed frame 1, the bed board 2 can roll on the fixed roller 31, that is, the fixed roller 31 can not only support the bed board 2, but also roll the bed board 2 relative to the fixed roller 31, and at the same time, limit the downward swing of the bed board 2. The rolling structure of the fixed roller 31 facilitates the relative adjustment of the position of the bed board 2 and the bed frame 1, so that the fixed roller 31 needs to at least partially protrude from the top surface of the bed frame 1.

[0060] In addition, the first support member 32 can also be set as one as needed, so that one end of the first support member 32 is connected to the front end face of the bed frame 1, and the other end is connected to one side of the fixed roller 31, or the other end forms a forked structure and is respectively connected to the two ends of the fixed roller 31.

[0061] The shape of the first support member 32 can be adjusted as needed, and the present application does not limit this.

[0062] It should be noted that the material of the fixed roller 31 can be selected as needed. For example, the fixed roller 31 needs to be made of a material with small or no deformation. Therefore, the circumferential wall of the fixed roller 31 can be made of nylon, polytetrafluoroethylene or rubber. The fixed roller 31 needs to support the bed board 2.

[0063] The swing roller assembly 4 is connected to the bed frame 1 and at least partially protrudes from the top surface of the bed frame 1 . The swing roller assembly 4 is inserted into the strip-shaped through groove 21 and is spaced apart from the bottom plate 22 by a preset distance.

[0064] Specifically, the swing roller assembly 4 includes a second support member 41 , a swing arm 42 and a swing roller 43 .

[0065] The second support member 41 is disposed on the bed frame 1 and is located at an end away from the transmission mechanism where the bed frame 1 is connected to the bed board 2; the swing arm 42 is connected to the second support member 41; the swing roller 43 is connected to the swing arm 42, and at least a part of the swing roller 43 protrudes from the top surface of the bed frame 1 and is spaced apart from the bottom plate 22 of the strip-shaped through groove 21 by a preset distance; wherein, the swing arm 42 is used to support and limit the swing roller 43, and the swing roller 43 is placed in the strip-shaped through groove 21 to limit the upward swing of the bed board 2.

[0066] The swing roller 43 is made of rubber material. Exemplarily, when the swing roller 43 is in the initial position, the swing roller 43 is spaced apart from the bottom plate 22 by a preset distance so that the bottom plate 22 can slide between the swing roller 43 and the fixed roller 31. When it is necessary to clamp the bottom plate 22, the swing arm 42 is adjusted so that the distance between the swing roller 43 and the fixed roller 31 becomes smaller, thereby forming a clamp on the bottom plate 22 to suppress the vertical vibration of the bed board 2.

[0067] It should be noted that the second support member 41 can be fixedly connected to the bed frame 1. The second support member 41 is located at the front end of the bed frame 1. Exemplarily, the second support member 41 is located below the fixed roller 31. In this way, the second support member 41 and the first support member 32 are arranged vertically at the front end of the bed frame 1. The two ends of the second support member 41 are respectively connected to the swing arm 42, and the distance between the two swing arms 42 is greater than the width of the fixed roller assembly 3.

[0068] It should also be noted that the swing arm 42 includes a first swing arm 42 and a second swing arm 42. One ends of the first swing arm 42 and the second swing arm 42 are respectively connected to the second support member 41, and the other ends are respectively rotatably connected to the two ends of the swing roller 43. When the swing roller 43 is placed in the strip-shaped through groove 21, the swing roller 43, the first swing arm 42, the second support member 41 and the second swing arm 42 form a frame to enclose the fixed roller assembly 3, and a gap is formed between the swing roller 43 and the fixed roller 31 for the bottom plate 22 to pass through.

[0069] Finally, it should be noted that the second support member 41 includes a double-output shaft motor; the outer wall of the double-output shaft motor is connected to the bed frame 1. Among the two shafts, one shaft is connected to the first swing arm 42, and the other shaft is connected to the second swing arm 42, so that when the double-output shaft motor is in operation, it drives the first swing arm 42 and the second swing arm 42 to rotate, and adjusts the distance between the fixed roller assembly 3 and the swing roller 43. In this way, the double output shafts of the double-output shaft motor are oppositely arranged at both ends of the motor. When the motor is in operation, the double output shafts can rotate synchronously. The lengths of the two shafts of the double output shafts and the overall length of the motor are greater than the length of the fixed roller assembly 3. When one shaft is connected to the first swing arm 42 and the other shaft is connected to the second swing arm 42 and a perpendicular connection is formed, the distance between the first swing arm 42 and the second swing arm 42 is greater than the width of the fixed roller assembly 3. Exemplarily, both the first swing arm 42 and the second swing arm 42 are columnar or rectangular structures.

[0070] Furthermore, the second support member 41 further includes a fixed housing. The double-output shaft motor is arranged inside the fixed housing. Through holes are provided on opposite sides of the fixed housing along the width direction of the bed frame 1, so that the double output shafts of the double-output shaft motor respectively pass through the through holes and are connected to the first swing arm 42 and the second swing arm 42. That is to say, the outer wall of the fixed housing is connected to the front end face of the bed frame 1 to form a fixed structure. The fixed housing is used to protect the double-output shaft motor.

[0071] To sum up, the swing roller assembly 4 and the fixed roller assembly 3 are arranged at intervals, so that the swing roller 43 and the fixed roller assembly 3 clamp the bottom plate 22. When the bed board 2 makes a variable-speed movement along the length direction, the swing roller assembly 4 is adjusted to make the swing roller assembly 4 and the fixed roller assembly 3 come into contact, generating a downward pressure on the bottom plate 22, so that the bottom plate 22 is respectively attached to the swing roller assembly 4 and the fixed roller assembly 3, suppressing the vertical vibration of the bed board 2.

[0072] In one embodiment, a device for suppressing the vibration of a CT scanning bed board further includes a control system. The control system is connected to the double-output shaft motor. The control system sends a status signal to the double-output shaft motor, and the double-output shaft motor acts in response to the status signal to adjust the first swing arm 42 and the second swing arm 42, so that the swing roller 43 connected to the first swing arm 42 and the second swing arm 42 moves downward, applying a downward pressure on the bottom plate 22.

[0073] Among them, after obtaining the patient's height information and the scanning position information, the control system sends an instruction to the existing CT scanning device. According to the instruction, the bed board 2 of the CT scanning device moves to the target position and forms a status signal, which is fed back to the control system. The control system sends a status signal and corresponding action instructions to the double-output shaft motor according to the received status signal. The double-output shaft motor responds to the status signal and starts to act, controlling the swing arm 42 to rotate, so as to realize the movement of the swing roller 43 towards the bed board 2, and cooperate with the fixed roller 31 to clamp and fix the bed board 2, suppressing the vertical vibration of the bed board 2. Thus, the time spent waiting for the bed board 2 to stop during CT scanning is saved, and the work efficiency is improved.

[0074] In addition, in addition to the above method, the control system can also arrange a camera in the room where the CT scanning device is located. The camera can take pictures of the bed board 2 at preset time intervals. When the bed board 2 responds to the instruction of the control system and starts to move, the instruction of the control system is synchronously sent to the camera, and the camera starts to take pictures of the bed board 2, forming a series of continuous photos. The series of continuous photos are transmitted to the control system, and the control system extracts the feature information of the bed board 2 from the series of continuous photos. When the moving distance is 0 or less than the preset moving distance after comparing the feature information of the bed board 2 in two consecutive photos, the control system determines that the bed board 2 has stopped moving. At this time, the control system sends a status signal to the double-output shaft motor, and the double-output shaft motor responds to the status signal and starts to act.

[0075] In addition, due to the combination of multiple factors such as the manufacturing error of the bed board 2, the patient's weight, and the moving speed of the scanning bed, the contact between the surface of the bed board 2 and the swing roller 43 will vibrate during the movement. Therefore, after installation, the configuration parameter table in the control system can be set according to different working conditions as shown in Table 1. Because the material of the swing roller 43 is a flexible material such as rubber, during clinical application, the swing roller 43 can adjust the swing angle θ of the swing roller in real time according to the real-time working conditions, generating different downward pressures, making the vibration and noise of the bed board 2 smaller and the patient's use experience better.

[0076] Patient weight Table speed Relative position between tabletop and table frame 0-M1 0-V1 0-S1 M1 - M2 V1 - V2 S1 - S2 ... ... ... Mn-1 - Mn Vn-1 - Vn Sn-1 - Sn

[0077] Table 1

[0078] Embodiment

[0079] This application designs a method for suppressing the vibration of the CT scanning bed board, improving the quality of the scanned image, improving the comfort of the patient, shortening the scanning time and improving the scanning efficiency.

[0080] The working principle is that when the bed board 2 of the CT scan stops moving, a downward pressure is applied to the bed board 2 to make the bed board 2 fit with the horizontal bed frame 1, eliminating the relative vibration between the bed board 2 and the bed frame 1.

[0081] At the front end of the horizontal bed frame 1 of the CT scan bed board 2, an oscillating roller 43 is added to cooperate with the fixed roller 31 to limit the degree of freedom of the bed board 2 in the vertical direction. When the bed board 2 undergoes a variable-speed movement (such as starting, accelerating, decelerating, stopping) and generates vibrations, the double-output shaft motor drives the oscillating roller 43 to complete a rotational movement through the swing arm 42, causing the oscillating roller 43 to exert a downward pressure on the bed board 2 and fit between the oscillating roller 43 and the fixed roller 31. At this time, the relative vibration between the bed board 2 and the bed frame 1 is suppressed, the vibration amplitude of the bed board 2 at the scanning plane is reduced, the scanning quality is improved, and the patient comfort can also be enhanced.

[0082] The fixed roller 31 and the oscillating roller 43 form a support mechanism for the bed board 2. The fixed roller 31 is fixedly installed at the front end of the bed frame 1 and fits with the lower surface of the bed board 2 through a bracket (the first support member 32), preventing the bed board 2 from undergoing excessive deformation due to excessive load. The oscillating roller 43 is connected to the double-output shaft motor through the swing arm 42, and the double-output shaft motor can control the position of the oscillating roller 43 by controlling the rotation angle.

[0083] The oscillating roller 43 can be controlled to fit with the inner lower surface of the bed board 2 through the double-output shaft motor. The downward pressure of the oscillating roller 43 on the bed board 2 is provided by the driving force of the double-output shaft motor. By controlling the rotation angle of the double-output shaft motor, the magnitude of the downward pressure of the roller on the bed board 2 and the mating clearance can be changed. As Figure 6 shown, when the swing arm 42 is perpendicular to the ground, there is a gap between the oscillating wheel and the inner lower surface of the bed board 2. When the swing arm 42 swings clockwise, the oscillating wheel fits with the inner lower surface of the bed board 2, which can suppress the upward vibration of the bed board 2.

[0084] Workflow

[0085] To reduce the resistance of the horizontal movement drive motor of the bed board 2, when the scan bed does not enter the scanning area or during the patient positioning and plain film shooting stage, the oscillating roller 43 does not participate in the work. When the scan bed reaches the designated position, the system issues a command, and the oscillating roller 43 switches from position 1 to position 2, and the oscillating roller 43 cooperates with the system control to suppress the vibration of the bed board 2.

[0086] At the same time, due to the combination of multiple factors such as the manufacturing error of the bed board 2, the patient's weight, and the movement speed of the scan bed, the contact between the surface of the bed board 2 and the oscillating roller 43 will vibrate during the movement. Therefore, after installation, according to different working conditions, in the system configuration parameter table, because the material of the roller is a flexible material such as rubber, during clinical application, the oscillating roller 43 can adjust the rotation angle θ of the oscillating wheel in real time according to the real-time working conditions, generating different downward pressures, making the vibration and noise of the bed board 2 smaller and giving the patient a better usage experience.

[0087] This application designs a scanning bed mechanism that can suppress the vibration of the bed board 2, which can reduce the jitter at the cantilever end of the bed board 2 during the variable-speed movement of the scanning bed, improve the scanning quality. At the same time, all CT scanning beds on the current market adopt rigid supports, or the rollers are made of rubber materials to slow down the vibration of the bed board 2. When the bed board 2 sends the patient to the scanning position, the radiation source needs to reserve time for the bed board 2 to stop jittering before performing the scanning action. Using this design can shorten the scanning preparation time, improve the scanning efficiency of the hospital, and shorten the patient's diagnosis time.

[0088] In summary, this application can reduce the jitter at the cantilever end of the bed board 2 during the variable-speed movement of the scanning bed through a method and device for suppressing the vibration of the CT scanning bed board, improve the scanning quality. At the same time, all CT scanning beds on the current market adopt rigid supports, or the rollers are made of rubber materials to slow down the vibration of the bed board 2. When the bed board 2 sends the patient to the scanning position, the radiation source needs to reserve time for the bed board 2 to stop jittering before performing the scanning action. This application can shorten the scanning preparation time, improve the scanning efficiency of the hospital, and shorten the patient's diagnosis time.

[0089] In one embodiment, due to differences in the patient's weight, height, and CT scanning position, there will be differences in the moving distance of the bed board 2 and the up-and-down vibration time. Therefore, taking the patient's weight, height / scanning position, and the moving distance of the bed board 2 (the moving distance of the bed board 2 can be obtained according to different CT scanning positions) as reference variables, the vibration amplitude of the bed board 2 at the target position is obtained and a corresponding relationship is formed. After obtaining this corresponding relationship, according to the corresponding relationship, the angle by which the double-output shaft motor drives the swing arm 42 to rotate is obtained. That is to say, after obtaining the corresponding relationship, according to the corresponding relationship, it is determined how many degrees the double-output shaft motor rotates. In this way, the clamping of the swing roller on the bed board 2 can make the vibration of the bed board 2 decay rapidly, reaching the expected vibration amplitude or stopping vibrating. The corresponding relationship and the rotation angle of the double-output shaft motor are used as training data and input into an existing big data model for training to obtain a trained big data model, thereby obtaining a target big data model.

[0090] It should be noted that after obtaining the target big data model, verification is still required. That is, the corresponding relationship is input into the target big data model to obtain the rotation angle of the double-output shaft motor, which is compared with the actual rotation angle of the double-output shaft motor, and the parameters of the target big data model are fine-tuned to ensure the accuracy of the target big data model. That is, the known corresponding relationship and the rotation angle of the double-output shaft motor are used as test data to test the target big data model.

[0091] After obtaining the target big data model, before the doctor performs a CT scan on the patient, the weight, height, and scanning position parameters of the patient can be input into the target big data model. The target big data model will output the rotation angle of the double-output shaft motor according to the input parameters, so that when the control system sends an execution signal to the double-output shaft motor, the rotation angle information of the double-output shaft motor is carried. In this way, the double-output shaft motor will execute the rotation angle according to the execution signal, so as to clamp the bed board 2 with a suitable force, avoiding the rotation angle of the double-output shaft motor being too large or too small, which may correspondingly result in an insignificant reduction in the vibration effect of the bed board 2, or an excessive clamping force, affecting the service life of the double-output shaft motor and the wear of the swing roller 43.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for suppressing vibration of a CT scanning bed, characterized in that: include: A bed frame, on which a bed board capable of sliding relative to the bed frame is arranged; The bed board has a bottom with a strip-shaped through groove arranged along its length direction, and the bottom surface of the strip-shaped through groove is a bottom plate; A fixed roller assembly connected to the bed frame and at least partially protruding from the top surface of the bed frame and in contact with the bottom surface of the bottom plate; A swing roller assembly is connected to the bed frame and at least partially protrudes from the top surface of the bed frame. The swing roller assembly is inserted into the belt-shaped through groove and is spaced a preset distance from the bottom plate; wherein, The swing roller assembly and the fixed roller assembly are spaced apart so that the swing roller and the fixed roller assembly clamp the bottom plate. When the bed plate makes a speed-changing motion along the length direction, the swing roller assembly is adjusted to make the swing roller assembly and the fixed roller assembly come into contact, thereby generating downward pressure on the bottom plate, so that the bottom plate is respectively fitted with the swing roller assembly and the fixed roller assembly, thereby suppressing the vertical vibration of the bed plate.

2. The device for suppressing CT scanning bed vibration according to claim 1, characterized in that: The fixed roller assembly comprises: A first support member is provided on the bed frame and is located at an end away from a transmission mechanism connecting the bed frame and the bed board; A fixed roller is connected to the first support member. Under the support of the first support member, the fixed roller at least partially protrudes from the top surface of the bed frame and fits with the bottom surface of the bed frame; wherein, The fixed roller is located below the bottom plate to limit the downward swing of the bed plate.

3. The device for suppressing CT scanning bed vibration according to claim 1, characterized in that: The swing roller assembly comprises: A second support member is provided on the bed frame and is located at an end away from a transmission mechanism connecting the bed frame and the bed board; a swing arm connected to the second support member; A swing roller is connected to the swing arm, the swing roller at least partially protrudes from the top surface of the bed frame and is spaced a preset distance from the bottom plate of the strip-shaped through groove; wherein, The swing arm is used to support and limit the swing roller, and the swing roller is placed in the belt-shaped through groove to limit the upward swing of the bed board.

4. The device for suppressing CT scanning bed vibration according to claim 3, characterized in that: The swing arm includes a first swing arm and a second swing arm. One end of the first swing arm and the second swing arm are respectively connected to the second support member, and the other end is respectively rotatably connected to two ends of the swing roller.

5. The device for suppressing CT scanning bed vibration according to claim 4, characterized in that: The second support member includes a double-output shaft motor; The outer wall of the double-shaft motor is connected to the bed frame. Among the two shafts, one shaft is connected to the first swing arm, and the other shaft is connected to the second swing arm, so that when the double-shaft motor is in working state, it drives the first swing arm and the second swing arm to rotate and adjust the distance between the fixed roller assembly and the swing roller.

6. The device for suppressing CT scanning bed vibration according to claim 5, characterized in that: The second support member further includes a fixed housing; The double-shaft motor is arranged in the fixed shell, and through holes are arranged on opposite sides of the fixed shell along the width direction of the bed frame, so that the double shafts of the double-shaft motor pass through the through holes respectively and are connected to the first swing arm and the second swing arm.

7. The device for suppressing CT scanning bed vibration according to claim 6, characterized in that: It also includes a control system, which is connected to the double-output shaft motor. The control system sends a status signal to the double-output shaft motor, and the double-output shaft motor responds to the status signal to adjust the first swing arm and the second swing arm so that the swing roller connected to the first swing arm and the second swing arm moves downward to apply downward pressure to the base plate.

8. The device for suppressing CT scanning bed vibration according to claim 2, characterized in that: The circumferential wall of the fixed roller is made of nylon, polytetrafluoroethylene or rubber material.

9. The device for suppressing CT scanning bed vibration according to claim 3, characterized in that: The swing roller is made of rubber material.

10. A method for suppressing vibration of a CT scanning bed, characterized in that: The device for suppressing CT scanning bed vibration applied to any one of claims 1 to 9 comprises: A status signal is obtained according to the target position information of the bed board; Applying downward pressure to one end of the bed board according to the state signal, wherein the one end of the bed board refers to the end away from the connection between the bed board and the bed frame movement mechanism; According to the downward force, the vertical vibration of the bed board is suppressed.

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