A device and method for suppressing vibration of CT scanning bed

Abstract

The present application relates to the technical field of CT scanning bed plate vibration. A device for suppressing the vibration of a CT scanning bed plate includes a bed frame, on which a bed plate capable of sliding relative to the bed plate is arranged; the bed plate, whose bottom width direction is an arc-shaped structure; a pneumatic device, arranged below the bed plate, and the upper surface of the pneumatic device and the lower surface of the bed plate have the same curvature, the upper surface of the pneumatic device and the lower surface of the bed plate are separated by a preset distance, and the center of the pneumatic device can blow a high-speed airflow to the lower surface of the bed plate; two fixed roller assemblies, arranged on both sides of the lower surface of the bed plate, and connected to the bed frame, with a pneumatic device in the middle, and the fixed roller assembly is used to support the bed plate; wherein, after the bed plate slides relative to the bed frame, when the bed plate stops, in the case of vibration, the pneumatic device is activated to blow a high-speed airflow to the bed plate, so that a negative pressure is formed between the bed plate and the pneumatic device, and a downward pressure is formed on the bed plate. It can effectively suppress the vibration of the bed plate and improve the quality of the scanned image.

Description

Technical Field

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

[0002] The current CT system requires the use of a scanning bed and a host. The patient lies on the bed board 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, the image is stitched out layer by layer. When scanning the head or a small area, if the bed board is still vibrating in the scanning plane when the scan starts, it is impossible to stitch out an effective image, resulting in an inability to diagnose. The bed board of the CT equipment currently on the market is connected to the motion mechanism on the bed frame at the rear. The bed board with a large load demand needs to be supported by rollers at the front end of the horizontal bed frame to prevent the front end of the bed board from deforming and affecting the quality of the tomography image.

[0003] The horizontal movement of the scanning bed mostly adopts ball screw or belt drive. The mounting bracket of the bed board is connected to the transmission mechanism. Rollers are set at the front end of the horizontal bed frame to support the bed board. The surface of the roller is in line contact with the bottom surface of the bed board, which can only limit the freedom of the bed board to deform downward. When the scanning bed starts, stops, accelerates, decelerates, and other speed-changing movements, the bed board is in a cantilever state and will vibrate up and down, affecting the quality of the scanned image and making it impossible to accurately diagnose the lesion area. Summary of the invention

[0004] The present application provides a device and method for suppressing vibration of a CT scanning bed plate, which is used to solve the problem that the bed plate may vibrate up and down when it is in a cantilever state.

[0005] The first aspect of the present application provides a device for suppressing vibration of a CT scanning bed, comprising:

[0006] A bed frame, on which a bed board capable of sliding relative to the bed frame is arranged;

[0007] The bed board has an arc-shaped structure in the bottom width direction;

[0008] A pneumatic device is arranged below the bed board, and the upper surface of the pneumatic device and the lower surface of the bed board have the same curvature, the upper surface of the pneumatic device and the lower surface of the bed board are separated by a preset distance, and the center of the pneumatic device can blow a high-speed airflow toward the lower surface of the bed board;

[0009] Two fixed roller assemblies are arranged on both sides of the lower surface of the bed board and connected to the bed frame, with the pneumatic device in between. The fixed roller assemblies are used to support the bed board; wherein,

[0010] After the bed board slides relative to the bed frame and stops, vibration is generated, and the pneumatic device operates to blow high-speed airflow toward the bed board, so that negative pressure is formed between the bed board and the pneumatic device, thereby exerting downward pressure on the bed board.

[0011] In some embodiments, the pneumatic device includes:

[0012] A pneumatic part is arranged on the front end surface of the bed frame, and the pneumatic part is located below the bed board and is spaced apart from the bed board by a preset distance; the curvature of the upper surface of the pneumatic part is the same as the curvature of the lower surface of the bed board, and a vertical air outlet is arranged at the center of the pneumatic part;

[0013] The vacuum generator is connected to the air inlet end of the air outlet so as to blow out a high-speed airflow between the pneumatic part and the bed board through the air outlet.

[0014] In some embodiments, the pneumatic part includes:

[0015] A pneumatic plate, the center of which has the air outlet, and a side surface of the pneumatic plate is provided with a horizontal slide groove arranged along the length direction thereof, and the length direction of the pneumatic plate has an adjusting screw hole;

[0016] A first screw rod passes through the adjusting screw hole and is threadedly connected to the adjusting screw hole, and two ends of the first screw rod protrude from the pneumatic plate respectively;

[0017] A direction adjustment component is connected to the front end of the bed frame, and the direction adjustment component is connected to the protruding pneumatic plate parts at both ends of the first screw, and the direction adjustment component is slidably connected to the horizontal slide; wherein,

[0018] When the first screw is rotated, the relative position of the first screw and the adjusting screw hole is adjusted, so that the horizontal position of the pneumatic plate is adjusted when the horizontal slide groove and the direction adjustment component are slidably connected.

[0019] In some embodiments, the direction adjustment component includes:

[0020] A vertical adjustment connecting piece, one side of which is provided with a horizontal slider, and the other side of which is provided with at least two vertical slide grooves and a vertical nut, wherein the horizontal slider is partially disposed in the horizontal slide groove and can slide relatively, and both ends of the vertical adjustment connecting piece are rotatably connected to the first screw rod;

[0021] A fixed connector, one side of which is connected to the bed frame, and the other side of which is provided with vertical sliders having the same number as the vertical slide grooves, wherein at least part of the vertical sliders are placed in the vertical slide grooves so that the vertical sliders can slide in the vertical slide grooves, and a middle part of one side of the fixed connector provided with the vertical slider is recessed to form a receiving space for receiving the vertical nut, so that when the fixed connector and the vertical adjustment connector are fitted together, the receiving space covers the vertical nut;

[0022] The second screw rod passes through the top wall and the bottom wall of the accommodating space, and at least one end of the second screw rod protrudes from the accommodating space. The second screw rod is threadedly connected with the vertical nut in the accommodating space so as to circumferentially rotate the second screw rod protruding from the accommodating space to adjust the relative position of the second screw rod and the vertical nut, so that the vertical adjustment connecting piece drives the pneumatic plate to move in the vertical direction.

[0023] Some of the possible implementation methods include:

[0024] Measuring instruments;

[0025] The pneumatic plate is provided with protrusions on both end surfaces in the length direction;

[0026] The convex block is provided with an assembly hole; wherein,

[0027] The measuring instrument passes through the assembly hole to measure the distance between the upper surface of the pneumatic plate and the lower surface of the bed plate.

[0028] In some embodiments, the measuring instrument is a dial indicator or a micrometer.

[0029] In some embodiments, the fixed roller assembly includes:

[0030] A fixed roller, which is in contact with the lower surface of the bed board and is used to support the bed board;

[0031] A support frame has one end connected to the bed frame and the other end connected to the fixed roller.

[0032] Some of the possible implementation methods include:

[0033] The motion mechanism is arranged between the bed board and the bed frame and is located on a side of the bed frame away from the two fixed roller assemblies so that the motion mechanism provides power for the relative movement between the bed board and the bed frame.

[0034] Some of the possible implementation methods include:

[0035] A control system is connected to the pneumatic device and is used to send a working signal to the pneumatic device; the pneumatic device responds to the working signal and blows a high-speed airflow to the lower surface of the bed board.

[0036] A second aspect of the present application provides a method for suppressing vibration of a CT scanning bed, which is applied to the aforementioned device for suppressing vibration of a CT scanning bed, and the method comprises:

[0037] A status signal is obtained according to the target position information of the bed board;

[0038] According to the state signal, an execution signal is sent to the pneumatic device, and the pneumatic device applies downward pressure at one end of the bed board by using the Bernoulli principle, wherein the one end of the bed board refers to the end away from the bed board and the bed frame connected by the motion mechanism;

[0039] According to the downward force, the vertical vibration of the bed board is suppressed.

[0040] Beneficial effects of this application:

[0041] A device and method for suppressing the vibration of a CT scanning bed plate, firstly, a bed plate capable of sliding relative to the bed plate is arranged on a bed frame; the bottom width direction of the bed plate is an arc-shaped structure; a pneumatic device is arranged below the bed plate, and the upper surface of the pneumatic device has the same curvature as the lower surface of the bed plate, and the upper surface of the pneumatic device and the lower surface of the bed plate are separated by a preset distance, and the center of the pneumatic device can blow a high-speed airflow to the lower surface of the bed plate; two fixed roller assemblies are arranged on both sides of the lower surface of the bed plate and connected to the bed frame, with the pneumatic device in the middle, and the fixed roller assembly is used to support the bed plate; secondly, after the bed plate slides relative to the bed frame, when the bed plate stops and vibration is formed, the pneumatic device is activated to blow a high-speed airflow to the bed plate, so that a negative pressure is formed between the bed plate and the pneumatic device, and a downward pressure is formed on the bed plate. Through the above structure, the vibration of the bed plate can be effectively suppressed, the scanning image quality can be improved, the patient comfort can be improved, the scanning time can be shortened, and the scanning efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 This is a schematic diagram of the structure of a device for suppressing vibration of a CT scanning bed in the present application;

[0044] Figure 2 This is a schematic diagram of the front-end structure of a device for suppressing vibration of a CT scanning bed board according to the present application;

[0045] Figure 3 This is an exploded diagram of the structure of a pneumatic device for suppressing vibration of a CT scanning bed plate in the present application;

[0046] Figure 4 This is a schematic diagram of the structure of a vertical adjustment connector and a fixed connector of a device for suppressing vibration of a CT scanning bed board in the present application;

[0047] Figure 5 This is a schematic diagram of the structure of a pneumatic plate and a vertical adjustment connector of a device for suppressing vibration of a CT scanning bed board in the present application;

[0048] Figure 6 for Figure 3 Assembly drawing of

[0049] Figure 7 A schematic diagram of the force application of the pneumatic device and the bed board of a device for suppressing the vibration of a CT scanning bed board in the present application;

[0050] Figure 8 This is a schematic diagram of the structure of a pneumatic device for suppressing vibration of a CT scanning bed board according to the present application;

[0051] Fig. 9 This is a schematic diagram of the distance between a bed plate and a pneumatic device of a device for suppressing vibration of a CT scanning bed plate in the present application.

[0052] Description of reference numerals:

[0053] 1. Bed frame; 2. Bed board; 3. Pneumatic device; 31. Pneumatic part; 311. Pneumatic plate; 312. First screw; 313. Direction adjustment assembly; 3131. Vertical adjustment connector; 3132. Fixed connector; 3133. Second screw; 3134. Horizontal slider; 3135. Vertical slide; 3136. Vertical nut; 3137. Vertical slider; 3138. Accommodating space; 3139. Fixing part; 314. Air outlet; 315. Bump; 316. Horizontal slide; 317. Adjusting screw hole; 32. Vacuum generator; 4. Fixed roller assembly; 41. Fixed roller; 5. Moving mechanism; 6. Measuring instrument. DETAILED DESCRIPTION

[0054] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0055] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] like Figures 1 to 9 As shown, the first aspect of the present application provides a device for suppressing vibration of a CT scanning bed plate, comprising a bed frame 1 , a bed plate 2 , a pneumatic device 3 and two fixed roller assemblies 4 .

[0058] The bed frame 1 is provided with a bed board 2 that can slide relative to the bed board 1. The bottom width direction of the bed board 2 is an arc-shaped structure, that is, the bottom of the bed board 2 is an arched structure, so that the bottom of the bed board 2 forms a smooth curve. The motion mechanism 5 is arranged between the bed board 2 and the bed frame 1, and is located on the side of the bed frame 1 away from the two fixed roller assemblies 4, so that the motion mechanism 5 provides power for the relative movement between the bed board 2 and the bed frame 1. It should be noted that the motion mechanism 5 is a conventional mechanism, for example, the motion mechanism 5 is a roller.

[0059] The pneumatic device 3 is arranged below the bed board 2, and the upper surface of the pneumatic device 3 has the same curvature as the lower surface of the bed board 2. The upper surface of the pneumatic device 3 and the lower surface of the bed board 2 are spaced at a preset distance, and the center of the pneumatic device 3 can blow high-speed airflow toward the lower surface of the bed board 2.

[0060] Specifically, the pneumatic device 3 includes a pneumatic part 31 and a vacuum generator 32. The pneumatic part 31 is arranged on the front end surface of the bed frame 1, and the pneumatic part 31 is located below the bed board 2 and is spaced apart from the bed board 2 by a preset distance; the curvature of the upper surface of the pneumatic part 31 is the same as the curvature of the lower surface of the bed board 2, and a vertical air outlet 314 is arranged at the center of the pneumatic part 31; the vacuum generator 32 is arranged below the pneumatic part 31 and is connected to the air inlet end of the air outlet 314 so as to blow a high-speed airflow between the pneumatic part 31 and the bed board 2 through the air outlet 314.

[0061] It should be noted that when the curvature of the upper surface of the pneumatic part 31 is the same as the curvature of the lower surface of the bed board 2, and when the bed board 2 and the pneumatic part 31 are spaced at a preset distance, the distance formed between the bed board 2 and the pneumatic part 31 is the same, thereby ensuring that the high-speed airflow blown out by the pneumatic part 31 flows smoothly between the pneumatic part 31 and the bed board 2. Exemplarily, the distance between the bed board 2 and the pneumatic part 31 can be designed to be 0.3-1.5 mm, preferably 1 mm, as needed. An air outlet 314 is provided on the pneumatic part 31. Exemplarily, the air outlet 314 can be opened from bottom to top in the center of the pneumatic part 31, so that the high-speed airflow blown out through the air outlet 314 flows out on both sides evenly through the width direction of the bed board 2.

[0062] The vacuum generator 32 is arranged below the pneumatic part 31, and can be arranged on the front end face of the bed frame 1 as required. The vacuum generator 32 is connected to one end of the air inlet of the air outlet 314, so that the high-speed airflow formed by the vacuum generator 32 is blown to the bottom of the bed board 2 through the air outlet 314. It should be noted that the vacuum generator 32 is a conventional structure, and this application does not make any improvements thereto. The air inlet of the vacuum generator 32 can be arranged on the side of the vacuum generator 32 or on the bottom of the vacuum generator 32 as required.

[0063] Furthermore, the pneumatic part 31 may include a pneumatic plate 311 , a first screw rod 312 , and a direction adjustment assembly 313 . The pneumatic plate 311 has the air outlet 314 at the center, and a horizontal slide groove 316 arranged along its length direction is provided on one side surface of the pneumatic plate 311, and an adjusting screw hole 317 is provided in the length direction of the pneumatic plate 311; the first screw rod 312 passes through the adjusting screw hole 317 and is threadedly connected with the adjusting screw hole 317, and the two ends of the first screw rod 312 protrude from the pneumatic plate 311 respectively; the direction adjustment component 313 is connected to the front end of the bed frame 1, and the direction adjustment component is connected to the two ends of the first screw rod 312 that protrude from the pneumatic plate 311, and the direction adjustment component 313 is slidably connected to the horizontal slide groove 316; wherein, when the first screw rod 312 is rotated, the relative position of the first screw rod 312 and the adjusting screw hole 317 is adjusted, so that when the horizontal slide groove 316 and the direction adjustment component 313 are slidably connected, the horizontal position of the pneumatic plate 311 is adjusted.

[0064] Specifically, a vertical air outlet 314 is provided at the center of the pneumatic plate 311, and the curvature of the top surface of the pneumatic plate 311 is the same as the curvature of the lower surface of the bed plate 2. In the length direction of the pneumatic plate 311, there is an inwardly recessed horizontal slide 316, which runs through the side wall of the pneumatic plate 311 so that it can slide in the horizontal direction when assembled with the direction adjustment component 313. The horizontal sliding of the pneumatic plate 311 relies on the first screw 312 to provide power. The first screw 312 is threadedly connected to the adjustment screw hole 317, so that when the first screw 312 rotates and the position of the first screw 312 is fixed, the pneumatic plate 311 will move in the horizontal direction. It should be noted that at least one end of the first screw 312 protrudes from the direction adjustment component 313 when it is rotatably connected to the direction adjustment component 313, so that the staff can hold the first screw 312 protruding from the direction adjustment component 313 and rotate the first screw 312 circumferentially.

[0065] The direction adjustment component 313 can be connected to the front end of the bed frame 1 , and can serve not only as a mechanism for adjusting the direction of the pneumatic plate 311 , but also as a supporting mechanism for the pneumatic plate 311 .

[0066] Furthermore, the direction adjustment assembly 313 may include a vertical adjustment connector 3131 , a fixed connector 3132 , and a second screw rod 3133 .

[0067] The vertical adjustment connecting piece 3131 is provided with a horizontal slider 3134 on one side and at least two vertical slide grooves 3135 and a vertical nut 3136 on the other side. The horizontal slider 3134 is partially located in the horizontal slide groove 316 and can slide relatively. The two ends of the vertical adjustment connecting piece 3131 are rotationally connected to the first screw rod 312.

[0068] The fixed connector 3132 is connected to the bed frame 1 on one side and is provided with vertical sliders 3137 on the other side, the same number as the vertical slide grooves 3135. The vertical sliders 3137 are at least partially located in the vertical slide grooves 3135 so that the vertical sliders 3137 can slide in the vertical slide grooves 3135. The fixed connector 3132 is provided with a depression in the middle of one side of the vertical slider 3137 to form a receiving space 3138 for accommodating the vertical nut 3136, so that when the fixed connector 3132 and the vertical adjustment connector 3131 are in fit, the receiving space 3138 covers the vertical nut 3136.

[0069] The second screw rod 3133 passes through the top wall and the bottom wall of the accommodating space 3138, and at least one end of the second screw rod 3133 protrudes from the accommodating space 3138. The second screw rod 3133 is threadedly connected with the vertical nut 3136 in the accommodating space 3138 so as to circumferentially rotate the second screw rod 3133 protruding from the accommodating space 3138 to adjust the relative positions of the second screw rod 3133 and the vertical nut 3136, so that the vertical adjustment connecting piece 3131 drives the pneumatic plate 311 to move in the vertical direction.

[0070] Specifically, a horizontal slider 3134 is provided on one side of the vertical adjustment connector 3131 adjacent to the pneumatic plate 311. The horizontal slider 3134 is arranged along the length direction of the vertical adjustment connector 3131. The horizontal slider 3134 and the horizontal slide groove 316 slide in cooperation with each other, thereby completing the horizontal movement of the pneumatic plate 311. A vertical slide groove 3135 and a vertical nut 3136 are provided on the other side opposite to the horizontal slider 3134 of the vertical adjustment connector 3131, wherein the vertical nut 3136 protrudes from the center of the vertical adjustment connector 3131 and may be on the center line of the vertical direction of the vertical adjustment connector 3131. The vertical slots are separately located on both sides of the vertical nut 3136, and the vertical slots are grooves formed by the inward depression of the side surface of the vertical adjustment connector 3131 and penetrating the top surface and the bottom surface.

[0071] The fixed connector 3132 is provided with vertical sliders 3137 of the same number as the vertical slide grooves 3135 on one side adjacent to the vertical adjustment connector 3131, and the positions thereof correspond to each other. In this way, when the fixed connector 3132 is fitted with the vertical adjustment connector 3131, the vertical sliders 3137 can be placed in the vertical slide grooves 3135, so that the fixed connector 3132 and the vertical adjustment connector 3131 form a vertical sliding connection. In addition, since the vertical nut 3136 protrudes from the vertical adjustment connector 3131, a groove in a direction away from the vertical adjustment connector 3131 is correspondingly provided on the fixed connector 3132. When the fixed connector 3132 is fitted with the vertical adjustment connector 3131, the vertical nut 3136 can be placed in the groove, that is, the groove forms a receiving space 3138 for receiving the vertical nut 3136.

[0072] In addition, in order to realize the relative movement of the fixed connecting member 3132 and the vertical adjustment connecting member 3131 in the vertical direction, holes are opened on the top and bottom surfaces of the accommodating space 3138 so that the second screw 3133 can pass through the holes on the top and bottom surfaces and form a connecting structure, that is, the second screw 3133 can form a rotational connection with the holes on the top and bottom surfaces, and at least one end of the second screw 3133 protrudes from the accommodating space 3138. Exemplarily, the second screw 3133 protrudes from the bottom of the accommodating space 3138. In this way, when the staff needs to adjust the vertical direction of the pneumatic plate 311, they can hold the second screw 3133 protruding from the bottom of the accommodating space 3138. Furthermore, before the second screw 3133 forms a rotational connection with the accommodation space 3138, the second screw 3133 needs to pass through the vertical nut 3136 after passing through the hole on the bottom surface of the accommodation space 3138, and then be rotationally connected with the hole on the top surface of the accommodation space 3138. In this way, when the second screw 3133 rotates circumferentially, the position of the second screw 3133 remains unchanged, and the vertical nut 3136 connected to the second screw 3133 will move in the vertical direction due to the influence of the thread. In order to ensure that the second screw 3133 does not fall off when it is rotationally connected with the accommodation space 3138, a fixing piece 3139 is provided at the bottom of the accommodation space 3138 for fixing the second screw 3133 at the bottom of the accommodation space 3138. The second screw 3133 protrudes from the accommodation space 3138 and also protrudes from the fixing piece 3139.

[0073] There are two fixed roller assemblies 4, which are respectively arranged on both sides of the lower surface of the bed board 2 and connected to the bed frame 1, with the pneumatic device 3 in between. The fixed roller assembly 4 is used to support the bed board 2. The fixed roller assembly 4 includes a fixed roller 41 and a support frame. The fixed roller 41 is in contact with the lower surface of the bed board 2 and is used to support the bed board 2; the support frame is connected to the bed frame 1 at one end and connected to the fixed roller 41 at the other end. Specifically, the support frame is embedded in the bed frame 1 (the width direction of the bed frame 1 is supported by two side panels, and a space is formed between the side panels. The support frame is placed in the space. For example, one end of the support frame can be connected to the inner wall of the side panel). The fixed roller 41 is tilted and at least partially protrudes from the bed frame 1. It should be noted that the fixed roller 41 is tilted to adapt to the arc structure of the lower surface of the bed board 2. The inclined surfaces of the two fixed rollers 41 are opposite, that is, the fixed rollers 41 are mirror-imaged. The fixed roller 41 and the support frame can also be arranged at the front end of the bed frame 1 as needed, and be spaced a certain distance from the front end, that is, an extension rod is installed at the front end of the bed frame 1, and the support frame is connected to the extension rod to form a right-angle structure. The role of the extension rod is to avoid the overlap of the positions of the fixed roller 41 and the pneumatic device 3, that is, the role of the extension rod is to make way for the pneumatic device 3. The structure of the support frame can be a rectangular parallelepiped, and the present application does not limit the structure of the support frame. It only needs to support the fixed roller 41 formed at a specific angle, so that when the bed board 2 and the bed frame 1 move relative to each other, the fixed roller 41 can effectively support the bed board 2.

[0074] In one embodiment, in order to ensure that the distances between the pneumatic plate 311 and the lower surface of the bed board 2 at each position are equal, a device for suppressing vibration of a CT scanning bed board includes a measuring instrument 6 .

[0075] The measuring instrument 6 is a conventional dial gauge or micrometer.

[0076] Specifically, in order to assemble the measuring instrument 6, a protrusion 315 can be set on the end surface of both ends of the pneumatic plate 311 in the length direction, and a corresponding assembly hole is set on the protrusion 315, and the axis of the assembly hole is perpendicular to the lower surface of the bed board 2. In this way, the detection end of the measuring instrument 6 passes through the assembly hole and abuts against the lower surface of the bed board 2 to measure the distance between the lower surface and the pneumatic plate 311. The two measuring instruments 6 can form a calibration of the measurement results, thereby ensuring that the distances at each position between the pneumatic plate 311 and the lower surface of the bed board 2 are equal. Next, after the two measuring instruments 6 have measured, the measuring instruments 6 are separated from the lower surface of the base plate. It should be noted that in the case where the measuring instrument 6 is interference-fitted with the assembly hole, after the measuring instrument 6 completes the measurement, the detection end of the measuring instrument 6 can be retracted into the assembly hole so that when measurement is needed again, the measuring instrument 6 can be used to continue to measure.

[0077] It should be noted that the two bumps 315 are located at the same position at both ends of the pneumatic plate 311, and there is a certain distance between the bump 315 and the top surface of the pneumatic plate 311, thereby avoiding the assembly holes on the bump 315 affecting the airflow when the bump 315 and the top surface of the pneumatic plate 311 are in the same plane.

[0078] In one embodiment, a device for suppressing vibration of a CT scanning table further includes a control system.

[0079] The control system is connected to the pneumatic device 3 and is used to send a working signal to the pneumatic device 3 ; the pneumatic device 3 responds to the working signal and blows out a high-speed airflow to the lower surface of the bed board 2 .

[0080] Specifically, the existing scanning bed frame 1 can detect the patient's weight, bed board 2 speed acceleration, and bed board 2 displacement. At the same time, a set of patient weight, scanning bed load, speed, bed board 2 displacement combination amplitude and frequency parameter table (patient weight range, speed range, bed board 2 displacement range) is preset in the control system as shown in Table 1. According to the clinical use parameters, the control system queries the corresponding bed board 2 amplitude and frequency, and controls the pneumatic device 3 to generate the corresponding flow rate and frequency, so that the patient has the best use experience and avoids the discomfort caused by rapid suppression of vibration and frequency mismatch.

[0081] patient weight Scanning bed speed Bed displacement amplitude frequency 0-M1 0-V1 0-S1 A1 f1 M1-M2 V1-V2 S1-S2 A2 f2 ... ... ... ... ... Mn-1-Mn Vn-1-Vn Sn-1-Sn An fn

[0082] Table 1

[0083] In addition, a camera can be arranged in the room where the CT scanning equipment is located. The camera can take pictures of the bed board 2 according to a preset time interval. When the bed board 2 starts to move in response to the command of the control system, the command of the control system is synchronously sent to the camera, and the camera starts to take pictures of the bed board 2 to form a plurality of consecutive photos. The plurality of photos are transmitted to the control system, and the control system extracts features from the plurality of consecutive photos to obtain feature information of the bed board 2. When the feature information of the bed board 2 is compared in two consecutive photos, and it is obtained that the movement distance of the bed board 2 in two adjacent photos is 0 or less than the preset movement distance, the control system determines that the bed board 2 stops moving. At this time, the control system sends an execution signal to the vacuum generator 32, and the motor starts to move in response to the execution signal.

[0084] To sum up, after the bed board 2 slides relative to the bed frame 1, when the bed board 2 stops and vibration is generated, the pneumatic device 3 is activated to blow a high-speed airflow toward the bed board 2, so that a negative pressure is formed between the bed board 2 and the pneumatic device 3, thereby forming a downward pressure on the bed board 2.

[0085] Example

[0086] A device for suppressing the vibration of a CT scanning bed, wherein a pneumatic device 3 blows out a high-speed airflow through high pressure ( Figure 7 The dotted line in the middle is the direction of the air flow), so that the gas flow rate at the bottom of the bed board 2 is greater than the gas flow rate on the upper side of the bed board 2. According to the Bernoulli principle (p+1 / 2ρv^2+ρgh=C), the pressure in the area with a large flow rate is small, so the bed board 2 is subjected to a downward pressure F, and the pressure F forms component forces F1 and F2, so that the bed board 2 produces a damping effect when it shakes, and quickly reduces the shaking of the bed board 2 on the scanning plane. Due to the use of non-contact adsorption force, no additional contact friction force is added. The friction force between the bed board 2 and the fixed roller 41 is rolling friction, which will not significantly affect the driving force. On the premise of reducing the shaking of the bed board 2, there is no obvious effect on the motion mechanism 5.

[0087] The pneumatic device 3 needs to be used in conjunction with the motion control system of the scanning bed. When the scanning bed changes speed, the pneumatic device 3 is triggered to suppress the shaking of the bed board 2 at the moment of vibration. At the same time, the control system uses the motion information of the bed board 2 to keep the scanning bed board 2 moving smoothly, reducing the image impact caused by shaking.

[0088] The lower end of the pneumatic plate 311 is an air inlet connected to the vacuum generator 32, and a flow channel is arranged inside, and the air is discharged through the upper surface outlet. According to the design position and installation position, the contours of the pneumatic device 3 and the lower surface of the bed board 2 are contour lines with an equidistant distance of 1mm, ensuring that the upper surface of the pneumatic mechanism can achieve equal clearance with the lower surface of the bed board 2.

[0089] The pneumatic device 3 is installed at the front end of the scanning bed frame 1 and is connected to the bed frame 1. The vertical adjustment connector 3131 and the fixed connector 3132 realize relative movement in the vertical direction through the slideway. The second screw 3133 is threadedly matched with the vertical adjustment connector 3131. The second screw 3133 is rotated to achieve fine adjustment of the vertical position. The pneumatic plate 311 and the vertical adjustment connector 3131 realize relative movement in the horizontal position through the slideway. The first screw 312 is threadedly matched with the pneumatic plate 311. The first screw 312 is rotated to achieve fine adjustment of the horizontal position. The gap between the adjustment plate and the bed board 2 is as small as possible, and the fixed roller 41 is matched to ensure that there is no friction and interference during the entire movement of the bed board 2. Among them, the protrusions 315 at both ends of the pneumatic plate 311 provide an installation interface for the measuring instrument 6. The matching gap is measured by the measuring instrument 6. When the pneumatic device 3 is adjusted, the measuring instrument 6 can be removed.

[0090] A second aspect of the present application provides a method for suppressing vibration of a CT scanning bed, which is applied to the aforementioned device for suppressing vibration of a CT scanning bed, and the method comprises:

[0091] A status signal is obtained according to the target position information of the bed board;

[0092] According to the state signal, an execution signal is sent to the pneumatic device, and the pneumatic device applies downward pressure at one end of the bed board by using the Bernoulli principle, wherein the one end of the bed board refers to the end away from the bed board and the bed frame connected by the motion mechanism;

[0093] According to the downward force, the vertical vibration of the bed board is suppressed.

[0094] 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 it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to 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 an arc-shaped structure in the bottom width direction; A pneumatic device is arranged below the bed board, and the upper surface of the pneumatic device and the lower surface of the bed board have the same curvature, the upper surface of the pneumatic device and the lower surface of the bed board are separated by a preset distance, and the center of the pneumatic device can blow a high-speed airflow toward the lower surface of the bed board; Two fixed roller assemblies are arranged on both sides of the lower surface of the bed board and connected to the bed frame, with the pneumatic device in between. The fixed roller assemblies are used to support the bed board; wherein, After the bed board slides relative to the bed frame and stops, vibration is generated, and the pneumatic device operates to blow high-speed airflow toward the bed board, so that negative pressure is formed between the bed board and the pneumatic device, thereby exerting downward pressure on the bed board.

2. The device for suppressing vibration of a CT scanning bed according to claim 1, characterized in that: The pneumatic device comprises: A pneumatic part is arranged on the front end surface of the bed frame, and the pneumatic part is located below the bed board and is spaced apart from the bed board by a preset distance; the curvature of the upper surface of the pneumatic part is the same as the curvature of the lower surface of the bed board, and a vertical air outlet is arranged at the center of the pneumatic part; The vacuum generator is connected to the air inlet end of the air outlet so as to blow out a high-speed airflow between the pneumatic part and the bed board through the air outlet.

3. The device for suppressing vibration of a CT scanning bed plate according to claim 2, characterized in that: The pneumatic part comprises: A pneumatic plate, the center of which has the air outlet, and a side surface of the pneumatic plate is provided with a horizontal slide groove arranged along the length direction thereof, and the length direction of the pneumatic plate has an adjusting screw hole; A first screw rod passes through the adjusting screw hole and is threadedly connected to the adjusting screw hole, and two ends of the first screw rod protrude from the pneumatic plate respectively; A direction adjustment component is connected to the front end of the bed frame, and the direction adjustment component is connected to the protruding pneumatic plate parts at both ends of the first screw, and the direction adjustment component is slidably connected to the horizontal slide; wherein, When the first screw is rotated, the relative position of the first screw and the adjusting screw hole is adjusted, so that the horizontal position of the pneumatic plate is adjusted when the horizontal slide groove and the direction adjustment component are slidably connected.

4. The device for suppressing vibration of a CT scanning bed plate according to claim 3, characterized in that: The direction adjustment component comprises: A vertical adjustment connecting piece, one side of which is provided with a horizontal slider, and the other side of which is provided with at least two vertical slide grooves and a vertical nut, wherein the horizontal slider is partially placed in the horizontal slide groove and can slide relatively, and both ends of the vertical adjustment connecting piece are rotatably connected to the first screw rod; A fixed connector, one side of which is connected to the bed frame, and the other side of which is provided with vertical sliders having the same number as the vertical slide grooves, wherein the vertical sliders are at least partially placed in the vertical slide grooves so that the vertical sliders can slide in the vertical slide grooves, and a middle part of one side of the fixed connector provided with the vertical slider is recessed to form a receiving space for receiving the vertical nut, so that when the fixed connector and the vertical adjustment connector are fitted together, the receiving space covers the vertical nut; The second screw rod passes through the top wall and the bottom wall of the accommodating space, and at least one end of the second screw rod protrudes from the accommodating space. The second screw rod is threadedly connected with the vertical nut in the accommodating space so as to circumferentially rotate the second screw rod protruding from the accommodating space to adjust the relative position of the second screw rod and the vertical nut, so that the vertical adjustment connecting piece drives the pneumatic plate to move in the vertical direction.

5. The device for suppressing vibration of a CT scanning bed plate according to claim 3, characterized in that: Also includes: Measuring instruments; The pneumatic plate is provided with protrusions on both end surfaces in the length direction; The convex block is provided with an assembly hole; wherein, The measuring instrument passes through the assembly hole to measure the distance between the upper surface of the pneumatic plate and the lower surface of the bed plate.

6. The device for suppressing vibration of a CT scanning bed plate according to claim 5, characterized in that: The measuring instrument is a dial indicator or a micrometer.

7. The device for suppressing vibration of a CT scanning bed plate according to claim 1, characterized in that: The fixed roller assembly comprises: A fixed roller, which is in contact with the lower surface of the bed board and is used to support the bed board; A support frame has one end connected to the bed frame and the other end connected to the fixed roller.

8. The device for suppressing vibration of a CT scanning bed according to claim 1, characterized in that: Also includes: The motion mechanism is arranged between the bed board and the bed frame and is located on a side of the bed frame away from the two fixed roller assemblies so that the motion mechanism provides power for the relative movement between the bed board and the bed frame.

9. The device for suppressing vibration of a CT scanning bed according to any one of claims 1 to 8, characterized in that: Also includes: A control system is connected to the pneumatic device and is used to send a working signal to the pneumatic device; the pneumatic device responds to the working signal and blows a high-speed airflow to the lower surface of the bed board.

10. A method for suppressing vibration of a CT scanning bed, characterized in that: The device for suppressing vibration of a CT scanning bed plate according to any one of claims 1 to 9 comprises: A status signal is obtained according to the target position information of the bed board; According to the state signal, an execution signal is sent to the pneumatic device, and the pneumatic device applies downward pressure at one end of the bed board by using the Bernoulli principle, wherein the one end of the bed board refers to the end away from the bed board and the bed frame connected by the motion mechanism; According to the downward force, the vertical vibration of the bed board is suppressed.

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