X-ray photography bed and X-ray photography system

Abstract

The utility model relates to the technical field of medical instruments, in particular to an X-ray photography bed and an X-ray photography system. The X-ray photography bed comprises a base, a lifting mechanism installed on the base, a bed panel, a film box assembly and a distance measuring sensor. The lifting mechanism is used for driving the bed panel to lift, the film magazine assembly is arranged below the bed panel, the film magazine assembly comprises an X-ray detector, and the X-ray detector is used for receiving X-rays penetrating through an object to be detected and the bed panel and carrying out X-ray imaging. And an object to be detected lies on the bed panel during detection. According to the X-ray radiography bed, the photoelectric sensor or the acoustic wave sensor is adopted, the height of the bed panel is directly measured through the photoelectric sensor or the acoustic wave, and compared with the height of the bed panel calculated by detecting the swing angle of a swing arm in the prior art, the height of the bed panel measured by the distance measuring sensor in the X-ray radiography bed is more accurate.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to an X-ray photography bed and an X-ray photography system. Background Art

[0002] In current X-ray photography beds, the bed board can usually be lifted and lowered. To improve the accuracy of scanning data, when using an X-ray photography bed for scanning examination, the height data of the bed board also needs to be obtained. Currently, a potentiometer or an encoder is usually used to measure the swing angle of the swing arm in the lifting mechanism of the bed board, and the height is calculated based on the rotation angle. Since the potentiometer and the encoder need a gear train to transmit the rotation angle, the clearance error of the gear train is relatively large, and the accuracy of the calculated height data of the bed board is relatively low. Utility Model Content

[0003] This application provides an X-ray photography bed to improve the technical problem of relatively low accuracy of the measured data of the height of the bed board of the current X-ray photography bed.

[0004] In addition, the purpose of this application is also to provide an X-ray photography system.

[0005] In a first aspect, in one embodiment, an X-ray photography bed is provided, including:

[0006] A bed frame;

[0007] A bed board, which is arranged on the bed frame;

[0008] A film cassette assembly, which is arranged under the bed board. The film cassette assembly includes an X-ray detector, and the X-ray detector is used to receive the X-rays passing through the object to be detected and the bed board and perform X-ray imaging. The bed board is used for the object to be detected to lie on;

[0009] A lifting mechanism, which is connected to the bed frame, and the lifting mechanism is used to drive the bed board and the bed frame to lift together;

[0010] A base, on which the lifting mechanism is installed;

[0011] And a laser distance sensor, which is installed on the bed board or the base or the bed frame. The laser distance sensor is used to measure the height of the bed board relative to a reference object when the bed board is lifted to a target position.

[0012] Further, in one embodiment, the base includes a seat body and a mounting seat fixed on the seat body. At least part of the lifting mechanism is installed on the mounting seat, and the laser distance sensor is installed on one side in the horizontal direction of the mounting seat.

[0013] Further, in one embodiment, the lifting mechanism includes a lifting arm, one end of the lifting arm is mounted on the mounting base, and the other end of the lifting arm is connected to the bed frame.

[0014] Further, in one embodiment, the mounting base includes an inner vertical plate and an outer vertical plate, the scissor mechanism includes a first swing arm, one end of the first swing arm is disposed between the inner vertical plate and the outer vertical plate, and the laser range finder sensor is mounted on a side of the inner vertical plate facing away from the outer vertical plate.

[0015] Further, in one embodiment, the lifting mechanism includes a scissor mechanism, at least a part of the scissor mechanism is hinged to the mounting base, and the optical path of the laser range finder sensor is beside the moving space of the scissor mechanism.

[0016] Further, in one embodiment, the X-ray photography bed further includes a sensor bracket, the laser range finder sensor is mounted on the sensor bracket, the X-ray photography bed further includes an angle adjuster for adjusting the tilt angle of the laser range finder sensor, and the angle adjuster is connected to the base or the bed panel or the bed frame or the sensor bracket; the X-ray photography bed further includes a sensor fixing member, the sensor fixing member is mounted on the sensor bracket, and the sensor fixing member is used to fix the laser range finder sensor after the tilt angle of the laser range finder sensor is adjusted.

[0017] Further, in one embodiment, the X-ray photography bed further includes a sensor bracket, the laser range finder sensor is mounted on the sensor bracket, and the sensor bracket is mounted on the base or the bed panel or the bed frame in a horizontally adjustable manner.

[0018] Further, in one embodiment, fixing screws are provided on the base, adjustment long holes for the fixing screws to pass through are provided on the sensor bracket, the sensor bracket can move horizontally relative to the base through the adjustment long holes, and the fixing screws fix the sensor bracket after the sensor bracket is adjusted in place.

[0019] Further, in one embodiment, in the length direction of the bed panel, the laser range finder sensor is close to one end of the bed panel and far from the other end of the bed panel.

[0020] Further, in one embodiment, the optical path of the laser range finder sensor extends vertically.

[0021] Further, in one embodiment, the bottom of the bed panel has a panel measurement surface for the laser emitted by the laser distance sensor mounted on the base to irradiate; and / or the bottom of the bed frame has a bed frame measurement surface for the laser emitted by the laser distance sensor mounted on the base to irradiate; and / or the base has a base measurement surface for the laser emitted by the laser distance sensor mounted on the bed frame to irradiate.

[0022] Further, in one embodiment, the reference object is the platform where the X-ray photography bed is located or the ground where the X-ray photography bed is located.

[0023] Further, in one embodiment, the height of the bed panel relative to the reference object is the actual height of the bed panel. The X-ray imaging lifting bed further includes a controller and a transmission data module for acquiring the transmission data of the lifting mechanism. The controller is connected to the transmission data module to be able to calculate the calculated height of the bed panel according to the data of the transmission data module; the controller is connected to the laser distance sensor to control the lifting mechanism to stop descending when the actual height of the bed panel exceeds the target value of the calculated height.

[0024] Further, in one embodiment, the lifting mechanism includes a swing arm, and the transmission data module includes an encoder or a potentiometer for acquiring the swing angle of the swing arm.

[0025] In one embodiment, another X-ray photography bed is provided, including:

[0026] A bed panel;

[0027] A film cassette assembly disposed below the bed panel. The film cassette assembly includes an X-ray detector for receiving X-rays passing through the object to be detected and the bed panel and performing X-ray imaging. The bed panel is for lying on the object to be detected;

[0028] A lifting mechanism for driving the bed panel to lift and lower;

[0029] A base on which the lifting mechanism is mounted;

[0030] And a distance sensor for measuring the height of the bed panel relative to a reference object when the bed panel is lifted to a target position; the distance sensor is an optoelectronic sensor or an acoustic wave sensor.

[0031] Further, in one embodiment, the X-ray photography bed further includes a bed frame, the bed board is installed on the bed frame, the lifting mechanism is connected to the bed frame and is used to drive the bed board and the bed frame to lift together, and the distance measuring sensor is installed on the bed board or the base or the bed frame.

[0032] Further, in one embodiment, the base includes a seat body and a mounting seat fixed on the seat body, at least part of the lifting mechanism is installed on the mounting seat, and the distance measuring sensor is installed on one side in the horizontal direction of the mounting seat.

[0033] Further, in one embodiment, the lifting mechanism includes a lifting arm, and one end of the lifting arm is installed on the mounting seat; alternatively, the lifting mechanism includes a scissor mechanism, at least part of the scissor mechanism is hinged on the mounting seat, and the optical path of the distance measuring sensor is beside the moving space of the scissor mechanism.

[0034] Further, in one embodiment, the mounting seat includes an inner vertical plate and an outer vertical plate, the scissor mechanism includes a first swing arm, one end of the first swing arm is arranged between the inner vertical plate and the outer vertical plate, and the distance measuring sensor is installed on the side of the inner vertical plate facing away from the outer vertical plate.

[0035] Further, in one embodiment, in the length direction of the bed board, the distance measuring sensor is close to one end of the bed board and far from the other end of the bed board.

[0036] Further, in one embodiment, the height of the bed board relative to the reference object is the actual height of the bed board. The X-ray imaging lifting bed further includes a controller and a transmission data module for acquiring the transmission data of the lifting mechanism. The controller is connected to the transmission data module so as to be able to calculate the calculated height of the bed board according to the data of the transmission data module; the controller is connected to the distance measuring sensor and is used to control the lifting mechanism to stop descending when the actual height of the bed board exceeds the target value of the calculated height.

[0037] In a second aspect, in one embodiment, an X-ray photography system is provided. The X-ray photography system includes an X-ray emitter and the X-ray photography bed as described in any one of the embodiments in the first aspect.

[0038] According to the X-ray photography bed of the above embodiment, since the X-ray photography bed uses an optoelectronic sensor or an acoustic wave sensor to directly measure the height of the bed board through the optoelectronic sensor or the acoustic wave, compared with the height of the bed board calculated by detecting the swing angle of the first swing arm in the prior art, the height of the bed board measured by the distance measuring sensor in the X-ray photography bed of the present application is more accurate. Description of the Drawings

[0039] Figure 1 It is a schematic structural diagram of an X-ray photography bed in an embodiment;

[0040] Figure 2 It is a schematic installation structure diagram of a laser distance sensor in an embodiment;

[0041] Figure 3 It is a schematic installation structure diagram of the laser distance sensor from another perspective in an embodiment;

[0042] Figure 4 It is another schematic structural diagram of the X-ray photography bed in an embodiment;

[0043] Figure 5 It is a schematic structural diagram of the distance sensor installed on the bed frame in an embodiment.

[0044] List of feature names corresponding to the reference numerals in the figure: 1, base; 11, seat body; 12, mounting seat; 121, inner vertical plate; 122, outer vertical plate; 2, lifting mechanism; 21, first swing arm; 22, second swing arm; 3, bed panel; 4, distance sensor; 5, bed frame; 6, optical path; 7, sensor bracket; 8, angle adjusting member; 80, adjusting screw; 9, sensor fixing member; 90, sensor fixing screw; 10, bracket fixing screw.

[0045] Explanation regarding the reference numerals in brackets in the drawings: Among the reference numerals in brackets in the drawings, the feature referred to by the reference numeral is both the feature represented by the number inside the brackets and the feature represented by the number outside the brackets. Detailed implementation manners

[0046] The present application will be further described in detail below in conjunction with the drawings through specific implementation manners. Similar elements in different implementation manners adopt related similar element numbers. In the following implementation manners, many details are described to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification, which is to avoid the core part of the present application being overwhelmed by excessive description. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0047] In addition, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment and do not mean a necessary sequence, unless it is stated otherwise that a certain sequence must be followed.

[0048] The serial numbers assigned to the components in this text, such as "first", "second", etc., are only used to distinguish the objects described and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in this application, unless otherwise specified, both include direct and indirect connection (coupling).

[0049] Aiming at the problem that the height accuracy of the bed panel calculated by the encoder is relatively low at present, in order to increase the height of the bed panel in the X-ray photography bed, the ranging sensor of this application adopts an optoelectronic sensor or an acoustic wave sensor. Since there is no mechanical error in the optoelectronic sensor and the acoustic wave sensor, the measurement accuracy is higher.

[0050] In one embodiment, please refer to Figures 1 to 5 ., the X-ray photography bed includes a base 1, a lifting mechanism 2 installed on the base 1, a bed panel 3, a cassette assembly (not shown in the figure), and a ranging sensor 4. The lifting mechanism 2 is used to drive the bed panel 3 to lift and lower. The cassette assembly is arranged below the bed panel 3. The cassette assembly includes an X-ray detector (not shown in the figure). The X-ray detector is used to receive the X-rays passing through the object to be detected and / or the bed panel 3 and perform X-ray imaging. The object to be detected lies on the bed panel 3 during the detection.

[0051] The ranging sensor 4 is used to measure the height of the bed panel 3 relative to the reference object when the bed panel 3 is lifted and lowered to the target position. The ranging sensor 4 is an optoelectronic sensor or an acoustic wave sensor. Specifically, in one embodiment, the ranging sensor 4 is a laser ranging sensor. In one embodiment, the reference object is the platform where the X-ray photography bed is located or the ground where the X-ray photography bed is located. In some other embodiments, the optoelectronic sensor can also be an infrared sensor or a magnetic induction sensor.

[0052] Since the ranging sensor 4 is an optoelectronic sensor or an acoustic wave sensor and directly measures the height of the bed panel 3, compared with the height of the bed panel 3 calculated by detecting the swing angle of the first swing arm in the prior art, the height of the bed panel 3 measured by the ranging sensor 4 in the X-ray photography bed of this application is more accurate.

[0053] It should be noted that the meaning of the lifting mechanism 2 driving the bed board 3 to lift in this application is that when the bed board 3 rises, the lifting mechanism 2 provides the power for rising to drive the bed board 3 to rise. When the bed board 3 descends, the bed board 3 can descend under the action of gravity. At this time, the lifting mechanism 2 provides resistance to control the descending speed of the bed board 3.

[0054] Regarding the film cassette assembly, the film cassette assembly can adopt any feasible manner. For example, the film cassette assembly includes a film cassette, and the X-ray detector is in the film cassette. When the X-ray detector needs to be taken out, the film cassette can be opened to operate the X-ray detector.

[0055] In one embodiment, please refer to Figure 1 , the X-ray photography bed further includes a bed frame 5. The bed board 3 is installed on the bed frame 5. The lifting mechanism 2 is connected to the bed frame 5 and is used to drive the bed board 3 and the bed frame 5 to lift together. The distance measuring sensor 4 is installed on the bed board 3 or the base 1 or the bed frame 5. In some other embodiments, in addition to being connected to the bed frame 5, the lifting mechanism 2 can also be directly connected to the bed board 3. In one embodiment, the lifting mechanism 2 is movably connected to the bed frame 5, which is convenient for the lifting mechanism 2 to move relative to the bed frame 5.

[0056] Regarding the structural form of the bed frame 5, specifically, in one embodiment, the bed frame 5 is a fixed frame or a fixed platform connected to the bed board 3, and the lifting mechanism 2 is connected to the fixed frame or the fixed platform. In another embodiment, a left-right driving mechanism for driving the bed board 3 to move left and right is provided on the bed frame 5. At this time, the bed board 3 can move left and right. In still another embodiment, a front-back driving mechanism for driving the bed board 3 to move forward and backward is further provided on the bed board 3. At this time, the bed board 3 can move forward and backward. For example, a cross slide is provided on the bed frame 5, and the bed board 3 is installed on the cross slide.

[0057] In one embodiment, please refer to Figures 1 to 3 , the base 1 includes a base body 11 and a mounting base 12 fixed on the base body 11. At least part of the lifting mechanism 2 is installed on the mounting base 12, and the distance measuring sensor 4 is installed on one side in the horizontal direction of the mounting base 12. By sharing the mounting base 12 for the lifting mechanism 2 and the distance measuring sensor 4, the structure is made more compact. Regarding one side in the horizontal direction, one side in the horizontal direction of the mounting base 12 can be the front side, the rear side, the left side or the right side of the mounting base 12.

[0058] Furthermore, in one embodiment, please refer to Figure 1 , the mounting base 12 is at the edge of the base body 11, and the distance measuring sensor 4 is installed on the side of the mounting base 12 facing the inside. Since the distance measuring sensor 4 is installed inside, this can reduce the external interference received by the distance measuring sensor 4, thereby improving the measurement accuracy. Specifically, in one embodiment, please refer to Figure 1, the length direction of the bed board 3 is the left - right direction, the width direction is the front - back direction, and the mounting seat 12 is at the edge of the seat body 11 in the left - right direction.

[0059] In some other embodiments, the position of the distance - measuring sensor 4 can be installed at any feasible position according to needs. For example, the distance - measuring sensor 4 is directly installed on the seat body 11. For another example, the distance - measuring sensor 4 can also be installed on the bed board 3. For yet another example, the distance - measuring sensor 4 can also be installed on the bed frame 5.

[0060] In one embodiment, please refer to Figure 1 , the distance - measuring sensor 4 is a laser distance - measuring sensor. Regarding the installation position of the laser distance - measuring sensor, in one embodiment, please refer to Figure 4 , the distance - measuring sensor 4 is installed on the base 1. The bottom of the bed board 3 has a panel measurement surface for the laser emitted by the laser distance - measuring sensor installed on the base 1 to irradiate. Please refer to Figure 4 , the distance measured by the laser distance - measuring sensor is H2. In one embodiment, please refer to Figure 1 , the bottom of the bed frame 5 has a bed - frame measurement surface for the laser emitted by the laser distance - measuring sensor installed on the base 1 to irradiate. Please refer to Figure 1 , the distance measured by the laser distance - measuring sensor is H1. In still another embodiment, please refer to Figure 5 , the base 1 has a base measurement surface for the laser emitted by the laser distance - measuring sensor installed on the bed frame 5 to irradiate. Please refer to Figure 5 , the distance measured by the laser distance - measuring sensor is H3. In one embodiment, according to needs, two or more distance - measuring sensors 4 can be used simultaneously.

[0061] Specifically, in one embodiment, the lifting mechanism 2 includes a scissor - lift mechanism. At least part of the scissor - lift mechanism is hinged to the mounting seat 12, and the optical path of the laser distance - measuring sensor is beside the moving space of the scissor - lift mechanism. In one embodiment, the lifting mechanism 2 includes a lifting arm. One end of the lifting arm is installed on the mounting seat 12, and the other end of the lifting arm is connected to the bed frame 5. Among them, the lifting arm can be a single - arm or a double - arm, and its specific structure is not limited.

[0062] In one embodiment, the mounting base 12 includes an inner vertical plate 121 and an outer vertical plate 122. The scissor mechanism includes a first swing arm 21. One end of the first swing arm 21 is disposed between the inner vertical plate 121 and the outer vertical plate 122. The distance measuring sensor 4 is installed on the side of the inner vertical plate 121 facing away from the outer vertical plate 122. The first swing arm 21 is installed between the inner vertical plate 121 and the outer vertical plate 122, with higher reliability. In this way, the distance measuring sensor 4 can also be installed on one side surface of the inner vertical plate 121, so that the first swing arm 21 and the distance measuring sensor 4 are respectively on both sides of the thickness direction of the inner vertical plate 121, without interference, and it is more convenient for layout and installation. In one embodiment, one end of the first swing arm 21 is hinged between the inner vertical plate 121 and the outer vertical plate 122. In some other embodiments, the first swing arm 21 can also be movably assembled between the inner vertical plate 121 and the outer vertical plate 122.

[0063] In one embodiment, the scissor mechanism further includes an electric push rod (not shown in the figure) and a second swing arm 22. The first swing arm 21 and the second swing arm 22 are in a scissor shape. The upper end of the first swing arm 21 is movably assembled on the bed frame 5, and the lower end is hinged on the base 1. The upper end of the second swing arm 22 is hinged on the bed frame 5, and the lower end is movably disposed on the base 1. In this way, the electric push rod acts on the first swing arm 21 or the second swing arm 22, and by changing the angle between the first swing arm 21 and the second swing arm 22, the lifting of the bed board 3 is realized. In one embodiment, the electric push rod includes a driving motor and a screw nut mechanism. The screw nut mechanism changes the rotational motion of the driving motor into a linear motion, and uses the forward and reverse rotation of the driving motor to complete the pushing and pulling actions.

[0064] In one embodiment, the number of scissor mechanisms is two. The two scissor mechanisms are spaced front and back and move synchronously. The second swing arms 22 of the two scissor mechanisms are parallel, and the first swing arms 21 of the two scissor mechanisms are also parallel.

[0065] In some other embodiments, in addition to the scissor mechanism, the lifting mechanism 2 can also be any other feasible mechanism, such as a sleeve type lifting mechanism 2. The lifting mechanism 2 includes a telescopic sleeve and an electric push rod. The telescopic sleeve is installed between the bed frame 5 and the base 1 to prevent the bed board 3 from tilting. The electric push rod drives the bed frame 5 to lift. The telescopic sleeve includes at least two barrel sections, wherein the top barrel section is fixed to the bed frame 5 and the bottom barrel section is fixed to the base 1.

[0066] In one embodiment, in the length direction of the bed board 3, the distance measuring sensor 4 is close to one end of the bed board 3 and far from the other end of the bed board 3. In this way, the distance measuring sensor 4 at the end can leave a large space below the bed board 3 for installing other mechanisms, and it is not easy to interfere with other mechanisms. Of course, in some other embodiments, according to needs, the distance measuring sensor 4 can also be close to the middle of the bed board 3 and far from the end of the bed board 3 in the length direction of the bed board 3.

[0067] In one embodiment, the optical path 6 of the laser distance sensor extends vertically. In some other embodiments, the optical path of the laser distance sensor may also extend obliquely.

[0068] In one embodiment, the X-ray examination table further includes a sensor bracket 7, the distance sensor 4 is mounted on the sensor bracket 7, the X-ray examination table further includes an angle adjusting member 8 for adjusting the tilt angle of the distance sensor 4, and the angle adjusting member 8 is connected to the base 1. The X-ray examination table further includes a sensor fixing member 9, the sensor fixing member 9 is mounted on the sensor bracket 7, and the sensor fixing member 9 is used to fix the distance sensor 4 after the tilt angle of the distance sensor 4 is adjusted. The angle of the distance sensor 4 can be adjusted by the angle adjusting member 8, which facilitates the installation of the distance sensor 4.

[0069] Specifically, in one embodiment, the angle adjusting member 8 is an adjusting screw 80, and the adjusting screw 80 is screwed onto the base 1. The adjusting screw 80 changes the tilt angle of the distance sensor 4 by abutting against the distance sensor 4. In one embodiment, the number of the adjusting screws 80 is two, and the two adjusting screws 80 are arranged at intervals up and down. In some other embodiments, the angle adjusting member 8 can also be rotatable relative to the base 1 and is threadedly connected to the sensor bracket 7.

[0070] In one embodiment, the sensor fixing member 9 is a sensor fixing screw 90 fixed on the sensor bracket 7. After the angle of the distance sensor 4 is adjusted in place, the distance sensor 4 is fixed by the sensor fixing screw 90.

[0071] In one embodiment, in order to facilitate the adjustment of the horizontal position of the distance sensor 4, the sensor bracket 7 is installed on the base 1 with an adjustable horizontal position. The horizontal position of the sensor bracket 7 can be adjusted, which facilitates the installation of the distance sensor 4. Specifically, in one embodiment, the base 1 is provided with a bracket fixing screw 10, and the sensor bracket 7 is provided with an adjusting long hole (not shown in the figure) for the bracket fixing screw 10 to pass through. The sensor bracket 7 can move horizontally relative to the base 1 through the adjusting long hole, and the bracket fixing screw 10 fixes the sensor bracket 7 after the sensor bracket 7 is adjusted in place.

[0072] Since the adjusting screw 80 is installed on the base 1, in order to prevent the adjusting screw 80 from interfering with the sensor bracket 7 and affecting the horizontal position adjustment, the sensor bracket 7 has an avoidance hole (not shown in the figure), and the adjusting screw 80 passes through the avoidance hole and contacts the distance sensor 4.

[0073] In some other embodiments, when the ranging sensor 4 is installed on the bed panel 3, the angle adjusting member 8 can also be installed on the bed panel 3. When the ranging sensor 4 is installed on the bed frame 5, the angle adjusting member 8 can also be installed on the bed frame 5. Similarly, the sensor bracket 7 can also be installed on the bed panel 3 or the bed frame 5 with its horizontal position adjustable.

[0074] In addition to the installation positions described above, in one embodiment, the angle adjusting member 8 can also be installed on the sensor bracket 7. At this time, an operating space needs to be reserved on the base 1 to facilitate the operation of the angle adjusting member 8.

[0075] In some other embodiments, in addition to the above-described adjustment method, the ranging sensor 4 can adopt any feasible adjustment method. The overall inclination angle of the sensor bracket 7 can be adjusted, and at the same time, the ranging sensor 4 on the sensor bracket 7 can be horizontally moved to adjust its position. For another example, the ranging sensor 4 can be horizontally moved relative to the sensor bracket 7, and at the same time, the inclination angle can also be adjusted relative to the sensor bracket 7.

[0076] During the lowering process of the bed panel 3, if a staff member or other objects being pressed are pressed, it is likely to cause damage. To improve the safety of the X-ray imaging lifting bed, in one embodiment, the height of the bed panel 3 relative to the reference object is the actual height of the bed panel 3. The X-ray imaging lifting bed further includes a controller and a transmission data module for obtaining the transmission data of the lifting mechanism 2. The controller is connected to the transmission data module to be able to calculate the calculated height of the bed panel 3 according to the data of the transmission data module. The controller is connected to the ranging sensor to control the lifting mechanism 2 to stop descending when the actual height of the bed panel exceeds the calculated height target value. In one embodiment, the controller can be a processor or a PLC.

[0077] Specifically, in one embodiment, the transmission data module includes an encoder or a potentiometer, and the encoder or potentiometer is used to obtain the rotational transmission data of the lifting mechanism 2. In one embodiment, the transmission data module includes an encoder or a potentiometer for obtaining the swing angle of the first swing arm 21 and / or the second swing arm 22. In still another embodiment, the lifting mechanism 2 includes a driving motor, and the transmission data module is an encoder for obtaining the rotational data of the driving motor.

[0078] When there is a maintenance worker or an object being pressed under the bed panel 3, the height of the bed panel 3 no longer decreases, while the lifting mechanism continues to descend. At this time, the calculated height calculated according to the data of the transmission data module is smaller, while the actual height of the bed panel 3 measured by the ranging sensor 4 is larger. When the actual height of the bed panel exceeds the calculated height target value, that is, when the difference between the actual height of the bed panel and the calculated height is greater than the target value, the controller controls the lifting mechanism 2 to stop descending, so as to prevent the lifting mechanism 2 from further descending and causing damage to the maintenance worker or the object being pressed. It should be noted that in this application, the controller controls the lifting mechanism 2 to stop descending, which includes both making the lifting mechanism 2 no longer move, that is, neither rising nor descending, and making the lifting mechanism 2 not descend but rise in the reverse direction.

[0079] In an embodiment of an X-ray imaging system, the X-ray imaging system includes an X-ray emitter and an X-ray examination table as described in any of the above embodiments. An X-ray detector is used to receive the X-rays emitted by the X-ray emitter.

[0080] The above uses specific examples to elaborate on this application, which is only used to help understand this application and is not intended to limit this application. For those skilled in the technical field to which this application belongs, based on the idea of this application, several simple deductions, deformations or substitutions can also be made.

Claims

1. An X-ray photography bed, characterized in that, Comprising: A bed frame; A bed board, which is arranged on the bed frame; A film cassette assembly, which is arranged under the bed board. The film cassette assembly includes an X-ray detector, which is used to receive the X-ray passing through the object to be detected and perform X-ray imaging. The bed board is used for lying the object to be detected; A lifting mechanism, which is connected to the bed frame and is used to drive the bed board and the bed frame to lift together; A base, on which the lifting mechanism is installed; And a laser distance measuring sensor, which is installed on the bed board or the base or the bed frame. The laser distance measuring sensor is used to measure the height of the bed board relative to a reference object when the bed board is lifted to a target position.

2. The X-ray photography bed according to claim 1, wherein, The base includes a seat body and a mounting seat fixed on the seat body. At least part of the lifting mechanism is installed on the mounting seat, and the laser distance measuring sensor is installed on one side in the horizontal direction of the mounting seat.

3. The X-ray photography bed according to claim 2, characterized in that, The lifting mechanism includes a lifting arm, one end of which is installed on the mounting seat, and the other end of which is connected to the bed frame.

4. The X-ray photography bed according to claim 2, wherein The lifting mechanism includes a scissor mechanism, at least part of which is hinged on the mounting seat, and the optical path of the laser distance measuring sensor is beside the moving space of the scissor mechanism.

5. The X-ray photography bed according to claim 4, characterized in that, The mounting seat includes an inner vertical plate and an outer vertical plate. The scissor mechanism includes a first swing arm, one end of which is arranged between the inner vertical plate and the outer vertical plate, and the laser distance measuring sensor is installed on the side of the inner vertical plate facing away from the outer vertical plate.

6. The X-ray photography bed according to any one of claims 1-5, characterized in that, The X-ray photography bed further includes a sensor bracket, on which the laser distance measuring sensor is installed. The X-ray photography bed further includes an angle adjusting member for adjusting the tilt angle of the laser distance measuring sensor, and the angle adjusting member is connected to the base or the bed board or the bed frame or the sensor bracket; The X-ray photography bed further includes a sensor fixing member, which is installed on the sensor bracket and is used to fix the laser distance measuring sensor after the tilt angle of the laser distance measuring sensor is adjusted.

7. The X-ray photography bed according to any one of claims 1-5, characterized in that, The X-ray photography bed further includes a sensor bracket, on which the laser distance measuring sensor is installed, and the sensor bracket is installed on the base or the bed board or the bed frame with adjustable horizontal position.

8. The X-ray photography bed according to claim 7, characterized in that, Fixing screws are provided on the base, and adjusting long holes for the fixing screws to pass through are provided on the sensor bracket. The sensor bracket can move horizontally relative to the base through the adjusting long holes, and the fixing screws fix the sensor bracket after the sensor bracket is adjusted in place.

9. The X-ray photography bed according to any one of claims 1-5, characterized in that, In the length direction of the bed board, the laser distance measuring sensor is close to one end of the bed board and far from the other end of the bed board.

10. The X-ray photography bed according to any one of claims 1-5, characterized in that, The optical path of the laser distance measuring sensor extends vertically.

11. The X-ray photography bed according to any one of claims 1-5, characterized in that, The bottom of the bed panel has a panel measurement surface for the laser emitted by the laser distance sensor installed on the base to irradiate; and / or the bottom of the bed frame has a bed frame measurement surface for the laser emitted by the laser distance sensor installed on the base to irradiate; and / or the base has a base measurement surface for the laser emitted by the laser distance sensor installed on the bed frame to irradiate.

12. The X-ray photographic bed according to any one of claims 1-5, characterized in that, The reference object is the platform where the X-ray photography bed is located or the ground where the X-ray photography bed is located.

13. The X-ray photography bed according to any one of claims 1 to 3, characterized in that, The height of the bed panel relative to the reference object is the actual height of the bed panel. The X-ray imaging lift bed further includes a controller and a transmission data module for obtaining the transmission data of the lifting mechanism. The controller is connected to the transmission data module to be able to calculate the calculated height of the bed panel according to the data of the transmission data module; the controller is connected to the laser distance sensor to control the lifting mechanism to stop descending when the actual height of the bed panel exceeds the target value of the calculated height.

14. The X-ray photography bed according to claim 13, characterized in that, The lifting mechanism includes a swing arm, and the transmission data module includes an encoder or a potentiometer for obtaining the swing angle of the swing arm.

15. An X-ray photographic bed, characterized in that, Including: A bed panel; A film cassette assembly disposed below the bed panel. The film cassette assembly includes an X-ray detector for receiving X-rays passing through the object to be detected and performing X-ray imaging. The bed panel is for lying the object to be detected; A lifting mechanism for driving the bed panel to lift and lower; A base on which the lifting mechanism is installed; And a distance sensor for measuring the height of the bed panel relative to the reference object when the bed panel is lifted and lowered to the target position; wherein, the distance sensor is an optoelectronic sensor or an acoustic wave sensor.

16. The X-ray photographic bed according to claim 15, characterized in that, The X-ray photography bed further includes a bed frame. The bed panel is installed on the bed frame. The lifting mechanism is connected to the bed frame to drive the bed panel and the bed frame to lift and lower together. The distance sensor is installed on the bed panel or the base or the bed frame.

17. The X-ray photography bed according to claim 15 or 16, characterized in that, The base includes a seat body and a mounting seat fixed on the seat body. At least part of the lifting mechanism is installed on the mounting seat, and the distance sensor is installed on one side in the horizontal direction of the mounting seat.

18. The X-ray photography bed according to claim 17, characterized in that, The lifting mechanism includes a lifting arm with one end installed on the mounting seat; or, the lifting mechanism includes a scissor mechanism with at least part of it hinged on the mounting seat, and the optical path of the distance sensor is beside the moving space of the scissor mechanism.

19. The X-ray photography bed according to claim 18, characterized in that, The mounting seat includes an inner vertical plate and an outer vertical plate. The scissor mechanism includes a first swing arm with one end disposed between the inner vertical plate and the outer vertical plate, and the distance sensor is installed on the side of the inner vertical plate facing away from the outer vertical plate.

20. The X-ray photography bed according to claim 15 or 16, characterized in that, In the length direction of the bed panel, the distance sensor is close to one end of the bed panel and far from the other end of the bed panel.

21. The X-ray photography bed according to claim 15, wherein, The height of the bed board relative to the reference object is the actual height of the bed board. The X-ray imaging lift bed further includes a controller and a transmission data module for acquiring the transmission data of the lifting mechanism. The controller is connected to the transmission data module to be able to calculate the calculated height of the bed board according to the data of the transmission data module. The controller is connected to the distance measuring sensor to control the lifting mechanism to stop descending when the actual height of the bed board exceeds the target value of the calculated height.

22. An X-ray imaging system, characterized in that, It includes an X-ray emitter and an X-ray photography bed according to any one of claims 1-21.

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