X-ray imaging system with precise zero return function
By designing the A and B return-to-zero detection mechanisms in the X-ray imaging system, the precise return-to-zero position of the X-ray source and the flat plate detector is achieved, which solves the problem that the accurate return-to-zero position cannot be achieved in the prior art and improves the imaging quality and accuracy, satisfying the initial conditions of three-dimensional CT scan.
Patent Information
- Application Number
- CN202411036197.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2044-07-31
AI Technical Summary
The existing X-ray imaging system cannot realize the precise zero-return function of X-ray source and flat plate detector before three-dimensional CT scan, affecting imaging quality and accuracy.
A system including an X-ray emitting device and a receiving device is designed, using an A-return detection mechanism and a B-return detection mechanism, through an A-return sensing sheet, an A-photoelectric sensor, a B-return sensing sheet, and a B-photoelectric sensor, combined with Deflection driver and tightening adjustment components enable precise return to zero of the X-ray source and flat panel detector.
The theoretical beam center axis of the X-ray source is always perpendicular to the detection plane of the plate detector, ensuring distortion-free, high-resolution real-time DR imaging, and completing accurate zero-resolution before the three-dimensional CT scan, satisfying the three-dimensional CT The initial imaging conditions improve imaging accuracy.
Smart Images
Figure CN118583899B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of X-rays, and in particular to an X-ray imaging system with a precise zero return function. Background Art
[0002] Nondestructive testing refers to the use of physical or chemical methods to test materials with the help of modern technology and equipment, under the premise of not damaging or affecting the performance of the object being tested, and not harming the internal structure of the object being tested, by utilizing the changes in heat, sound, light, electricity, magnetism and other reactions caused by abnormal internal structure or defects of the material.
[0003] With the rapid development of computer and microelectronics technology, digital technology, computer network and communication technology have had a wide and far-reaching impact on the field of X-ray imaging. X-ray tomography (CT, Computed Tomography), 3D CT imaging, spiral CT imaging, direct digital X-ray imaging (DR, Digital radiography), 2D or 2.5D DR imaging and other detections have been widely used in industrial detection, especially for industrial castings, die castings, wheels, etc. Because industrial X-ray detection will measure objects of different materials, thicknesses and densities, the test requirements are also different. High-voltage and high-current X-ray sources correspond to metal objects with larger density and thickness, and low-voltage micro-focus X-ray sources correspond to fine and higher magnification and high-definition resolution.
[0004] An existing Chinese patent (application number: CN202122405717.2) discloses a DR / CT detection system suitable for 2D / 2.5D / 3D, in which the radiation device and the imaging device cannot be deflected relative to the horizontal plane.
[0005] In addition, on a device that has both two-dimensional DR imaging and three-dimensional CT imaging, its radiation source and flat panel detector can be deflected up and down around their own axes as needed. For example, the existing Chinese patent application (application number: CN202311443715.X) discloses an X-ray imaging device, whose radiation source and detector can be deflected up and down relative to the horizontal plane, but its radiation source or detector does not have the function of accurately returning to zero position. Summary of the invention
[0006] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide an X-ray imaging system with a precise return to zero position function, which can simultaneously realize the precise return to zero position function of the X-ray source and the flat panel detector before performing a three-dimensional CT scan.
[0007] In order to solve the above technical problems, the present invention provides an X-ray imaging system with a precise zero return function, comprising:
[0008] Controller;
[0009] A support frame, the support frame is arranged inside a shielding room;
[0010] X-ray emitting device, the X-ray emitting device is located on one side of the supporting frame, the X-ray emitting device includes an A vertical moving frame, an A rotating frame, an X-ray source and an A return-to-zero detection mechanism, the A vertical moving frame is movably arranged on the supporting frame, the A rotating frame includes an A horizontal beam and an A deflection end plate arranged at the end of the A horizontal beam, the A deflection end plate is rotatably arranged on the A vertical moving frame through an A pin shaft, an A deflection driver connected to the controller for communication is arranged between the A pin shaft and the A vertical moving frame, the A deflection driver is used to drive the A deflection end plate to rotate relative to the A vertical moving frame; the X-ray source is arranged on the A horizontal beam; the A return-to-zero detection mechanism includes an A zero position sensing sheet, an A azimuth adjuster and an A photoelectric sensor, the A zero position sensing sheet The plate is arranged on the A deflection end plate and eccentric to the A pin shaft. The A azimuth regulator includes an A sensor rail, two A tightening adjustment components and an A sliding seat. The A sensor rail is arranged on the A vertical moving frame. The two A tightening adjustment components are symmetrically arranged on both sides of the length direction of the A sensor rail. Each A tightening adjustment component includes an A tightening bracket and an A tightening pin threaded through the A tightening bracket. The A sliding seat is arranged on the A sensor rail in a linear sliding manner along the length direction of the A sensor rail. The opposite sides of the A sliding seat are respectively matched with the A tightening pin stops of the two A tightening adjustment components. The A photoelectric sensor is arranged on the A sliding seat to move synchronously with the A sliding seat, and the A photoelectric sensor is communicatively connected to the controller.
[0011] The X-ray receiving device is located on the other side opposite to the supporting frame. The X-ray receiving device includes a B vertical moving frame, a B rotating frame, a flat-panel detector and a B return-to-zero detection mechanism. The B vertical moving frame is movably arranged on the supporting frame. The B rotating frame includes a B horizontal beam and a B deflection end plate arranged at the end of the B horizontal beam. The B deflection end plate is rotatably arranged on the B vertical moving frame through a B pin shaft. A B deflection driver connected to the controller for communication is arranged between the B pin shaft and the B vertical moving frame. The B deflection driver is used to drive the B deflection end plate to rotate relative to the B vertical moving frame. The flat-panel detector is linearly slidably arranged on the B horizontal beam along the length direction of the B horizontal beam. The B return-to-zero detection mechanism includes a B zero position sensor, a B azimuth adjuster and a B zero position sensor. Photoelectric sensor, B zero position sensing piece is arranged on B deflection end plate and eccentric to B pin shaft, B azimuth regulator comprises B sensor rail, two B tightening adjustment components and B sliding seat, B sensor rail is arranged on B vertical moving frame, two B tightening adjustment components are symmetrically arranged on both sides of B sensor rail in length direction, each B tightening adjustment component comprises B tightening bracket and B tightening pin threadedly arranged on B tightening bracket, B sliding seat is arranged on B sensor rail in linear sliding manner along length direction of B sensor rail, opposite sides of B sliding seat are respectively matched with B tightening pin stops of two B tightening adjustment components; said B photoelectric sensor is arranged on B sliding seat to move synchronously with B sliding seat, and B photoelectric sensor is communicatively connected to controller;
[0012] The deflection angle range of the X-ray source with the horizontal plane as the reference plane is -30 degrees to 30 degrees;
[0013] The deflection angle range of the flat panel detector with the horizontal plane as the reference plane is -30 degrees to 30 degrees;
[0014] When the A deflection driver drives the A rotating frame to reset around the A pin shaft, the A photoelectric sensor feeds back a zero position signal to the controller when the A zero position sensing piece moves to the sensing area of the A photoelectric sensor. After receiving the zero position return signal, the controller sends a stop command to the A deflection driver, and the A deflection driver stops running. At this time, the theoretical beam center axis of the X-ray source is in a horizontal state;
[0015] When the B deflection driver drives the B rotating frame to reset around the B pin shaft, the B photoelectric sensor feeds back a zero position signal to the controller when the B zero position sensing plate moves to the sensing area of the B photoelectric sensor. After receiving the return to zero position signal, the controller sends a stop command to the B deflection driver, and the B deflection driver stops running. At this time, the detection plane of the flat-panel detector is perpendicular to the horizontal plane.
[0016] Furthermore, the A sensor guide rail is a long groove structure, including a groove bottom and two groove sides symmetrically arranged on opposite sides of the groove bottom, and each groove side forms a hook portion on the side away from the groove bottom; the A sliding seat includes a seat body, a seat body screw arranged on the seat body, and a seat body nut threadedly connected to the seat body screw, the seat body nut cooperates with the hook portion stop and is slidably arranged in the groove cavity of the A sensor guide rail.
[0017] Furthermore, the seat body includes a slide plate portion, two side wing portions and a sensor mounting portion. The slide plate portion is slidably matched with the A sensor guide rail. The two side wing portions are symmetrically arranged on both sides of the slide plate portion along the length direction of the A sensor guide rail. The two side wing portions are respectively matched with the A locking pin stops of two A locking adjustment assemblies. The sensor mounting portion is arranged on the slide plate portion and located between the two side wing portions. The sensor mounting portion is connected to the A photoelectric sensor.
[0018] Furthermore, the slide plate is provided with four screw penetration holes for allowing the seat body screws to penetrate therethrough, wherein two screw penetration holes constitute one group, and the remaining two screw penetration holes constitute another group.
[0019] Furthermore, the sensor mounting portion is provided with four adjustment holes for mounting the A photoelectric sensor, two of which constitute one group, and the remaining two adjustment holes constitute another group.
[0020] Furthermore, the A clamping bracket includes a clamping connection portion that fixes the A sensor guide rail to the A vertical moving frame, one side of the clamping connection portion is bent and extended to form a limiting portion, and the other side of the clamping connection portion is bent and extended to form a stop portion, the limiting portion abuts against the end of the A sensor guide rail, and the A clamping pin is threadedly provided on the stop portion.
[0021] Furthermore, the A zero-position sensing plate includes a first plate portion, a second plate portion and a third plate portion which are vertically connected in sequence, and the first plate portion is arranged on the A deflection end plate; the A photoelectric sensor includes a sensor body, a light-emitting arm arranged on the sensor body and a photosensitive arm arranged on the sensor body, the photosensitive arm and the light-emitting arm are arranged opposite to each other, and the gap between the light-emitting arm and the photosensitive arm allows the third plate portion to pass through.
[0022] Furthermore, the A deflection driver includes a motor, a driving wheel and a driven wheel. The motor is arranged on the A vertical moving frame, the driving wheel is arranged on the output end of the motor, the driven wheel is sleeved and fixed on the A pin shaft and the driven wheel is transmission-connected to the driving wheel.
[0023] Furthermore, a detector track is provided on the B horizontal beam, the length direction of the detector track is parallel to the length direction of the B horizontal beam, and the detector track is slidably matched with the flat-panel detector.
[0024] Furthermore, the X-ray emitting device also includes a mounting frame for mounting the X-ray source, and the mounting frame is arranged on the A horizontal beam.
[0025] As described above, the X-ray imaging system with precise zeroing function of the present invention has the following beneficial effects: In the X-ray imaging system of the present invention, the controller itself is an existing structure, and the controller is used to receive information, process information and issue instructions. The support frame can be a steel structure, which is used to support the X-ray emitting device and the X-ray receiving device. The X-ray imaging system of the present invention has two-dimensional DR imaging function and three-dimensional CT imaging function, and the deflection angle range of its X-ray source with the horizontal plane as the reference plane is -30 degrees to 30 degrees, and the deflection angle range of its flat-panel detector with the horizontal plane as the reference plane is -30 degrees to 30 degrees, and the deflection can be realized according to different needs, so that the theoretical beam center axis of the X-ray source and the detection plane of the flat-panel detector are always kept perpendicular, so as to realize distortion-free, high-resolution, two-dimensional deflection real-time DR imaging. More importantly, since the zeroing of the X-ray source and the zeroing of the flat-panel detector are both very important steps before performing a three-dimensional CT scan, the X-ray imaging system of the present invention also has the function of accurately returning the X-ray source and the flat-panel detector to zero. Specifically, before the three-dimensional CT scan, the theoretical beam center axis of the X-ray source needs to be accurately adjusted to the horizontal, and the theoretical beam center axis of the X-ray source needs to be always kept perpendicular to the detection plane of the flat-panel detector, so as to meet the initial conditions of three-dimensional CT imaging. Because the normal working environment temperature of the shielding room is 25°C, the repeatable sensing position accuracy that can be achieved by both the A photoelectric sensor and the B photoelectric sensor is 0.002mm. In order to accurately adjust the orientation of the A photoelectric sensor, two A tightening adjustment components are symmetrically arranged on both sides of the length direction of the A sensor guide rail, each A tightening adjustment component includes an A tightening bracket and an A tightening pin threaded through the A tightening bracket, and the A sliding seat is linearly slidably arranged on the A sensor guide rail along the length direction of the A sensor guide rail, and the opposite sides of the A sliding seat are respectively matched with the A tightening pin stops of the two A tightening adjustment components. In this way, the position of the A photoelectric sensor triggered by the A zero position sensing sheet is adjusted by the two A tightening pins. When the X-ray source is at zero position, the position of the A photoelectric sensor is adjusted by rotating the A tightening pins of the two A tightening adjustment components. Until the A photoelectric sensor senses and sends out a sensing signal, it means that the A photoelectric sensor has reached the position corresponding to the zero position of the X-ray source. Lock the position of the A photoelectric sensor relative to the A sensor guide rail by tightening the hexagonal nut on the A locking pin. After determining the zero position corresponding to the A photoelectric sensor, the X-ray source needs to be accurately returned to the zero position. By slowly rotating the A rotating frame, the A zero position sensing piece is brought close to the A photoelectric sensor. After the A zero position sensing piece is in place, the A photoelectric sensor triggers a signal, and the A photoelectric sensor provides a signal to the controller, and the precise return to zero position of the X-ray source is completed. Since the structure and principle of the B return to zero detection mechanism are the same as those of the A return to zero detection mechanism, the precise return to zero principle of the flat-panel detector will not be repeated.Therefore, the X-ray imaging system of the present invention can simultaneously realize the precise zeroing function of the X-ray source and the flat panel detector before performing three-dimensional CT scanning. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a simplified schematic diagram of an X-ray imaging system with a precise return-to-zero function according to the present invention.
[0027] Figure 2 Shown is a three-dimensional schematic diagram of an X-ray emitting device.
[0028] Figure 3 Shown is a schematic front view of an X-ray emitting device.
[0029] Figure 4 Shown is a three-dimensional schematic diagram of the A return-to-zero detection mechanism.
[0030] Figure 5 Shown is an exploded schematic diagram of the A return to zero detection mechanism.
[0031] Figure 6 Shown is a three-dimensional schematic diagram of an X-ray receiving device.
[0032] Figure 7 Shown is a front view schematic diagram of an X-ray receiving device.
[0033] Figure 8 Shown is a three-dimensional schematic diagram of the B return to zero detection mechanism.
[0034] Component number description: controller 1, support frame 2, X-ray emitting device 3, A vertical moving frame 31, A rotating frame 32, A horizontal beam 321, A deflection end plate 322, A pin shaft 323, X-ray source 33, A return to zero detection mechanism 34, A zero position sensor 341, first plate portion 3411, second plate portion 3412, third plate portion 3413, A azimuth regulator 342, A sensor guide rail 3421, groove bottom 3421a, groove side 3421b, hook edge portion 3421c, A tightening adjustment component 3422, A tightening bracket 3422a, pressing connection portion 3422aa, limiting portion 3422ab, stopping portion 3422ac, A tightening pin 3422b, A sliding seat 3423, seat body 3423a, slide plate portion 3423aa, side wing portion 3423ab, sensor mounting Mounting part 3423ac, screw penetration hole 3423ad, adjustment hole 3423ae, seat body screw 3423b, seat body nut 3423c, A photoelectric sensor 343, sensor body 3431, light-emitting arm 3432, photosensitive arm 3433, A deflection driver 35, driven wheel 351, mounting frame 36, X-ray receiving device 4, B vertical moving frame 41, B rotating frame 42, B horizontal beam 421, B deflection end plate 422, B pin 423, detector rail 424, flat panel detector 43, B zero return detection mechanism 44, B zero position sensor 441, B azimuth adjuster 442, B sensor guide rail 4421, B tightening adjustment assembly 4422, B tightening bracket 4422a, B tightening pin 4422b, B sliding seat 4423, B photoelectric sensor 443, B deflection driver 45. DETAILED DESCRIPTION
[0035] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0036] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.
[0037] like Figures 1 to 8As shown, the present invention provides an X-ray imaging system with a precise zero return function, comprising:
[0038] Controller 1;
[0039] A support frame 2, the support frame 2 is arranged inside a shielding room;
[0040] X-ray emitting device 3 (see Figure 2 , Figure 3 , Figure 4 as well as Figure 5 ), the X-ray emitting device 3 is located on one side of the supporting frame 2, the X-ray emitting device 3 includes an A vertical moving frame 31, an A rotating frame 32, an X-ray source 33 and an A return to zero detection mechanism 34, the A vertical moving frame 31 is arranged on the supporting frame 2 for vertical movement, the A rotating frame 32 includes an A horizontal beam 321 and an A deflection end plate 322 arranged at the end of the A horizontal beam 321, the A deflection end plate 322 is rotatably arranged on the A vertical moving frame 31 through an A pin shaft 323, and an A deflection driver 35 is arranged between the A pin shaft 323 and the A vertical moving frame 31 and is connected to the controller 1 for communication, the A deflection driver 35 is used to drive the A deflection end plate 322 to rotate relative to the A vertical moving frame 31; the X-ray source 33 is arranged on the A horizontal beam 321; the A return to zero detection mechanism 34 includes an A zero position sensing sheet 341, an A azimuth adjuster 342 and an A photoelectric sensor 343, the A zero position sensing sheet 341 is arranged on the A deflection end plate 322 and is eccentric to A pin shaft 323, A azimuth regulator 342 comprises A sensor rail 3421, two A tightening adjustment components 3422 and A sliding seat 3423, A sensor rail 3421 is arranged on A vertical moving frame 31, two A tightening adjustment components 3422 are symmetrically arranged on both sides of the length direction of A sensor rail 3421, each A tightening adjustment component 3422 comprises A tightening bracket 3422a and a screw threaded through A tightening bracket 3422a A locking pin 3422b, A sliding seat 3423 is linearly slidably arranged on A sensor guide rail 3421 along the length direction of A sensor guide rail 3421, and opposite sides of A sliding seat 3423 are respectively matched with A locking pin 3422b of two A locking adjustment components 3422; A photoelectric sensor 343 is arranged on A sliding seat 3423 to move synchronously with A sliding seat 3423, and A photoelectric sensor 343 is communicatively connected to controller 1;
[0041] X-ray receiving device 4 (see Figure 6 , Figure 7 as well as Figure 8), the X-ray receiving device 4 is located on the other side opposite to the supporting frame 2, the X-ray receiving device 4 includes a B vertical moving frame 41, a B rotating frame 42, a flat panel detector 43 and a B return to zero detection mechanism 44, the B vertical moving frame 41 is arranged on the supporting frame 2 for vertical movement, the B rotating frame 42 includes a B horizontal beam 421 and a B deflection end plate 422 arranged at the end of the B horizontal beam 421, the B deflection end plate 422 is rotatably arranged on the B vertical moving frame 41 through a B pin shaft 423, and a B deflection driver 45 connected to the controller 1 for communication is arranged between the B pin shaft 423 and the B vertical moving frame 41, and the B deflection driver 45 is used to drive the B deflection end plate 422 to rotate relative to the B vertical moving frame 41; the flat panel detector 43 is arranged on the B horizontal beam 421 for linear sliding along the length direction of the B horizontal beam 421; the B return to zero detection mechanism 44 includes a B zero position sensor 441, a B azimuth adjuster 442 and a B photoelectric sensor 443, the B zero position sensor 441 is arranged on the B The deflection end plate 422 is eccentric to the B pin 423, and the B azimuth regulator 442 includes a B sensor rail 4421, two B tightening adjustment components 4422 and a B sliding seat 4423. The B sensor rail 4421 is arranged on the B vertical moving frame 41, and the two B tightening adjustment components 4422 are symmetrically arranged on both sides of the length direction of the B sensor rail 4421. Each B tightening adjustment component 4422 includes a B tightening bracket 4422a and a threaded part 4422a provided on the B tightening bracket. The B fixing pin 4422b of 4422a, the B sliding seat 4423 is linearly slidably arranged on the B sensor guide rail 4421 along the length direction of the B sensor guide rail 4421, and the opposite sides of the B sliding seat 4423 are respectively matched with the B fixing pin 4422b of the two B fixing adjustment components 4422; the B photoelectric sensor 443 is arranged on the B sliding seat 4423 to move synchronously with the B sliding seat 4423, and the B photoelectric sensor 443 is communicatively connected to the controller 1;
[0042] The deflection angle range of the X-ray source 33 with the horizontal plane as the reference plane is -30 degrees to 30 degrees;
[0043] The deflection angle range of the flat panel detector 43 with the horizontal plane as the reference plane is -30 degrees to 30 degrees;
[0044] When the A deflection driver 35 drives the A rotating frame 32 to reset around the A pin shaft 323, the A photoelectric sensor 343 feeds back a zero position signal to the controller 1 when the A zero position sensing sheet 341 moves to the sensing area of the A photoelectric sensor 343. After receiving the zero position return signal, the controller 1 sends a stop command to the A deflection driver 35, and the A deflection driver 35 stops running. At this time, the theoretical beam center axis of the X-ray source 33 is in a horizontal state.
[0045] When the B deflection driver 45 drives the B rotating frame 42 to reset around the B pin shaft 423, the B photoelectric sensor 443 feeds back a zero position signal to the controller 1 when the B zero position sensing plate 441 moves to the sensing area of the B photoelectric sensor 443. After receiving the return to zero position signal, the controller 1 sends a stop command to the B deflection driver 45, and the B deflection driver 45 stops running. At this time, the detection plane of the flat-panel detector 43 is perpendicular to the horizontal plane.
[0046] In the X-ray imaging system of the present invention, the controller 1 itself is an existing structure, and the controller 1 is used to receive information, process information and issue instructions. The support frame 2 can be a steel structure, which is used to support the X-ray emitting device 3 and the X-ray receiving device 4. The X-ray imaging system of the present invention has a two-dimensional DR imaging function and a three-dimensional CT imaging function. The deflection angle range of its X-ray source 33 with the horizontal plane as the reference plane is -30 degrees to 30 degrees, and the deflection angle range of its flat-panel detector 43 with the horizontal plane as the reference plane is -30 degrees to 30 degrees. Deflection can be achieved according to different needs, so that the theoretical beam center axis of the X-ray source and the detection plane of the flat-panel detector are always kept perpendicular, so that distortion-free, high-resolution, two-dimensional deflection real-time DR imaging can be achieved. More importantly, since the return of the X-ray source 33 to zero and the return of the flat-panel detector 43 to zero are both very important steps before performing a three-dimensional CT scan, the X-ray imaging system of the present invention also has the function of accurately returning the X-ray source 33 and the flat-panel detector 43 to zero. Specifically, before three-dimensional CT scanning, the central axis of the theoretical beam of the X-ray source needs to be accurately adjusted to be horizontal, and at the same time, the central axis of the theoretical beam of the X-ray source needs to be always kept perpendicular to the detection plane of the flat-panel detector, so as to meet the initial conditions for three-dimensional CT imaging.
[0047] The A photoelectric sensor 343 and the B photoelectric sensor 443 both meet the following conditions:
[0048] When the ambient temperature is 25 degrees Celsius, the repeatability of the sensing position is 0.002mm;
[0049] When the ambient temperature is 55 degrees Celsius, the repeatability of the sensing position is 0.004mm;
[0050] When the ambient temperature is -25 degrees Celsius, the repeatability of the sensing position is 0.005mm;
[0051] Because the normal operating ambient temperature of the shielding room is 25°C, the repeatable sensing position accuracy that can be achieved by both the A photoelectric sensor 343 and the B photoelectric sensor 443 is 0.002mm.
[0052] In order to accurately adjust the position of the A photoelectric sensor 343, two A tightening adjustment components 3422 are symmetrically arranged on both sides of the length direction of the A sensor guide rail 3421. Each A tightening adjustment component 3422 includes an A tightening bracket 3422a and an A tightening pin 3422b threadedly arranged in the A tightening bracket 3422a. The A sliding seat 3423 is arranged on the A sensor guide rail 3421 in a linear sliding manner along the length direction of the A sensor guide rail 3421. The opposite sides of the A sliding seat 3423 are respectively matched with the A tightening pin 3422b of the two A tightening adjustment components 3422. In this way, the position of the A photoelectric sensor 343 triggered by the A zero position sensor sheet 341 is adjusted by the two A tightening pins 3422b. Specifically, the A tightening pin 3422b uses a standard M3P0.5mm tightening screw with a thread pitch of 0.5mm, that is, the axial position is adjusted by 0.5mm by rotating it 360°. If the sliding distance of the A photoelectric sensor 343 relative to the A sensor guide rail 3421 needs to be adjusted to 0.01mm, 0.5mm is divided into 50 equal parts, which corresponds to 0.01mm. Correspondingly, 360° is divided into 50 equal parts, which corresponds to 360 / 50=7.2°. Therefore, when the A photoelectric sensor 343 needs to be moved by 0.01mm, it can be achieved by rotating the standard set screw 7.2° clockwise or counterclockwise.
[0053] When the X-ray source 33 is at zero position, the position of the A photoelectric sensor 343 is adjusted by rotating the A fixing pins 3422b of the two A fixing adjustment components 3422. Until the A photoelectric sensor 343 senses and sends a sensing signal, it indicates that the A photoelectric sensor 343 has reached the position corresponding to the zero position of the X-ray source. The position of the A photoelectric sensor 343 relative to the A sensor guide rail 3421 is locked by tightening the hexagonal nut on the A fixing pin 3422b.
[0054] After determining the zero position corresponding to the A photoelectric sensor 343, the X-ray source needs to be accurately returned to the zero position. By slowly rotating the A rotating frame 32, the A zero position sensing piece 341 is brought close to the A photoelectric sensor 343. After the A zero position sensing piece 341 is in place, the A photoelectric sensor 343 triggers a signal, and the A photoelectric sensor 343 provides a signal to the controller 1, and the accurate return to zero position of the X-ray source is completed.
[0055] Since the structure and principle of the B return-to-zero detection mechanism 44 are the same as those of the A return-to-zero detection mechanism 34, the precise return-to-zero principle of the flat panel detector 43 is not described in detail.
[0056] Therefore, the X-ray imaging system of the present invention can simultaneously realize the precise zeroing function of the X-ray source 33 and the flat panel detector 43 before performing a three-dimensional CT scan.
[0057] Furthermore, in order to facilitate the linear sliding of the A sliding seat 3423 on the A sensor guide rail 3421, the A sensor guide rail 3421 is in the form of a long groove. The A sensor guide rail 3421 includes a groove bottom 3421a and two groove side portions 3421b symmetrically arranged on opposite sides of the groove bottom 3421a, and each groove side portion 3421b forms a hook portion 3421c on the side away from the groove bottom 3421a; the A sliding seat 3423 includes a seat body 3423a, a seat body screw 3423b arranged on the seat body 3423a, and a seat body nut 3423c threadedly connected to the seat body screw 3423b, the seat body nut 3423c cooperates with the hook portion 3421c stop and is slidably arranged in the groove cavity of the A sensor guide rail 3421.
[0058] Furthermore, in order to reduce the material usage of the seat body 3423a and simplify the structure of the seat body 3423a, the seat body 3423a includes a slide plate portion 3423aa, two side wing portions 3423ab and a sensor mounting portion 3423ac. The slide plate portion 3423aa is slidably matched with the A sensor guide rail 3421. The two side wing portions 3423ab are symmetrically arranged on both sides of the slide plate portion 3423aa along the length direction of the A sensor guide rail 3421. The two side wing portions 3423ab are respectively matched with the A locking pin stops of the two A locking adjustment assemblies 3422. The sensor mounting portion 3423ac is arranged on the slide plate portion 3423aa and is located between the two side wing portions 3423ab. The sensor mounting portion 3423ac is connected to the A photoelectric sensor 343.
[0059] Furthermore, in order to facilitate adjustment of the position of the seat body 3423a relative to the A sensor rail 3421, the slide plate portion 3423aa is provided with four screw penetration holes 3423ad for allowing the seat body screws 3423b to penetrate, wherein two screw penetration holes 3423ad constitute one group, and the remaining two screw penetration holes 3423ad constitute another group. In specific use, one group of screw penetration holes 3423ad is selected to connect the seat body screws 3423b.
[0060] Furthermore, in order to avoid motion interference between the A photoelectric sensor 343 and the A zero position sensing sheet 341, the sensor mounting portion 3423ac is provided with four adjustment holes 3423ae for mounting the A photoelectric sensor 343, wherein two adjustment holes 3423ae form one group, and the remaining two adjustment holes 3423ae form another group. In specific use, one group of adjustment holes 3423ae is selected to mount the A photoelectric sensor 343, so that the A zero position sensing sheet 341 just passes through the sensing area of the A photoelectric sensor 343.
[0061] Furthermore, in order to facilitate the A clamping bracket 3422a to quickly fix the A sensor guide rail 3421 on the A vertical moving frame 31, the A clamping bracket 3422a includes a clamping connection portion 3422aa for fixing the A sensor guide rail 3421 to the A vertical moving frame 31, one side of the clamping connection portion 3422aa is bent and extended to form a limiting portion 3422ab, and the other side of the clamping connection portion 3422aa is bent and extended to form a stop portion 3422ac, the limiting portion 3422ab abuts against the end of the A sensor guide rail 3421, and the A clamping pin 3422b is threadedly penetrated on the stop portion 3422ac.
[0062] Furthermore, in order to make the A zero-position sensing sheet 341 just pass through the sensing area of the A photoelectric sensor 343, the A zero-position sensing sheet 341 includes a first plate portion 3411, a second plate portion 3412 and a third plate portion 3413 which are vertically connected in sequence, and the first plate portion 3411 is arranged on the A deflection end plate 322; the A photoelectric sensor 343 includes a sensor body 3431, a light-emitting arm 3432 arranged on the sensor body 3431 and a photosensitive arm 3433 arranged on the sensor body 3431, the photosensitive arm 3433 and the light-emitting arm 3432 are arranged opposite to each other, and the gap between the light-emitting arm 3432 and the photosensitive arm 3433 allows the third plate portion 3413 to pass through.
[0063] Furthermore, in order to drive the A rotating frame 32 to deflect, the A deflection driver 35 includes a motor, a driving wheel and a driven wheel 351. The motor is arranged on the A vertical moving frame 31, the driving wheel is arranged at the output end of the motor, the driven wheel 351 is sleeved and fixed on the A pin shaft 323 and the driven wheel 351 is transmission-connected to the driving wheel.
[0064] Furthermore, in order to facilitate adjustment of the position of the flat panel detector 43 , a detector rail 424 is provided on the B horizontal beam 421 , the length direction of the detector rail 424 is parallel to the length direction of the B horizontal beam 421 , and the detector rail 424 is slidably matched with the flat panel detector 43 .
[0065] Furthermore, in order to facilitate the installation of the X-ray source 33 , the X-ray emitting device 3 also includes a mounting frame 36 for mounting the X-ray source 33 , and the mounting frame 36 is disposed on the A horizontal beam 321 .
[0066] In summary, the present invention can simultaneously realize the accurate zeroing function of the X-ray source and the flat panel detector before performing a three-dimensional CT scan. Therefore, the present invention effectively overcomes various shortcomings of the prior art and has a high industrial utilization value.
[0067] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.
Claims
1. An X-ray imaging system with a precise zero return function, characterized in that: include: Controller (1); A support frame (2), the support frame (2) being arranged inside a shielding room; An X-ray emitting device (3), the X-ray emitting device (3) is located on one side of the support frame (2), the X-ray emitting device (3) comprises an A vertical moving frame (31), an A rotating frame (32), an X-ray source (33) and an A zero return detection mechanism (34), the A vertical moving frame (31) is arranged on the support frame (2) to be movable up and down, the A rotating frame (32) comprises an A horizontal beam (321) and an A deflection end plate (322) arranged at the end of the A horizontal beam (321), the A deflection end plate (322) being rotatably arranged on the A horizontal beam (321) via an A pin shaft (323). An A deflection driver (35) is provided on the vertical moving frame (31) between the A pin shaft (323) and the A vertical moving frame (31) and is in communication with the controller (1). The A deflection driver (35) is used to drive the A deflection end plate (322) to rotate relative to the A vertical moving frame (31). The X-ray source (33) is provided on the A horizontal beam (321). The A zero return detection mechanism (34) comprises an A zero position sensing sheet (341), an A azimuth adjuster (342) and an A photoelectric sensor (343). The A zero position sensing sheet (341) is provided on the A deflection frame (31). The end plate (322) is eccentric to the A pin shaft (323), the A azimuth adjuster (342) comprises an A sensor guide rail (3421), two A tightening adjustment components (3422) and an A sliding seat (3423), the A sensor guide rail (3421) is arranged on the A vertical moving frame (31), the two A tightening adjustment components (3422) are symmetrically arranged on both sides of the A sensor guide rail (3421) in the length direction, and each A tightening adjustment component (3422) comprises an A tightening bracket (3422a) and a screw threaded through the A tightening bracket (3423). A sensor guide rail (3421) is provided with an A locking pin (3422b) of the A sensor guide rail (3421) and an A sliding seat (3423) which is linearly slidably arranged along the length direction of the A sensor guide rail (3421), and opposite sides of the A sliding seat (3423) respectively cooperate with the A locking pins (3422b) of the two A locking adjustment assemblies (3422); the A photoelectric sensor (343) is arranged on the A sliding seat (3423) to move synchronously with the A sliding seat (3423), and the A photoelectric sensor (343) is communicatively connected to the controller (1); An X-ray receiving device (4), the X-ray receiving device (4) being located on the other side opposite to the support frame (2), the X-ray receiving device (4) comprising a B vertical moving frame (41), a B rotating frame (42), a flat panel detector (43) and a B zero return detection mechanism (44), the B vertical moving frame (41) being arranged on the support frame (2) so as to be movable up and down, the B rotating frame (42) comprising a B horizontal beam (421) and a B deflection end plate (422) arranged at the end of the B horizontal beam (421), the B deflection end plate (422) being rotatably arranged on the B vertical moving frame (41) via a B pin shaft (423), a B deflection driver (45) being arranged between the B pin shaft (423) and the B vertical moving frame (41) and being communicatively connected to the controller (1), the B deflection driver (45) being used to drive the B deflection end plate (422) to rotate relative to the B vertical moving frame (41); The flat panel detector (43) is linearly slidably arranged on the B horizontal beam (421) along the length direction of the B horizontal beam (421); the B return to zero detection mechanism (44) comprises a B zero position sensing piece (441), a B azimuth adjuster (442) and a B photoelectric sensor (443); the B zero position sensing piece (441) is arranged on the B deflection end plate (422) and is eccentric to the B pin shaft (423); the B azimuth adjuster (442) comprises a B sensor guide rail (4421), two B tightening adjustment components (4422) and a B sliding seat (4423); the B sensor guide rail (4421) is arranged on the B vertical moving frame (41); the two B tightening adjustment components (4422) are symmetrically arranged on the B sensor guide rail (4421) and the B sliding seat (4423); 21) on both sides in the length direction, each B tightening adjustment component (4422) includes a B tightening bracket (4422a) and a B tightening pin (4422b) threadedly inserted into the B tightening bracket (4422a), a B sliding seat (4423) is linearly slidably arranged on the B sensor guide rail (4421) along the length direction of the B sensor guide rail (4421), and opposite sides of the B sliding seat (4423) are respectively engaged with the B tightening pins (4422b) of the two B tightening adjustment components (4422) by stops; the B photoelectric sensor (443) is arranged on the B sliding seat (4423) to move synchronously with the B sliding seat (4423), and the B photoelectric sensor (443) is communicatively connected to the controller (1); The X-ray source (33) has a deflection angle range of -30 degrees to 30 degrees with the horizontal plane as the reference plane; The flat panel detector (43) has a deflection angle range of -30 degrees to 30 degrees with the horizontal plane as the reference plane; When the A deflection driver (35) drives the A rotating frame (32) to reset around the A pin shaft (323), the A photoelectric sensor (343) feeds back a zero position signal to the controller (1) when the A zero position sensing sheet (341) moves to the sensing area of the A photoelectric sensor (343). After receiving the zero position signal, the controller (1) sends a stop command to the A deflection driver (35), and the A deflection driver (35) stops running. At this time, the theoretical beam center axis of the X-ray source (33) is in a horizontal state. When the B deflection driver (45) drives the B rotating frame (42) to reset around the B pin shaft (423), the B photoelectric sensor (443) feeds back a zero position signal to the controller (1) when the B zero position sensing sheet (441) moves to the sensing area of the B photoelectric sensor (443). After receiving the zero position signal, the controller (1) sends a stop command to the B deflection driver (45), and the B deflection driver (45) stops running. At this time, the detection plane of the flat panel detector (43) is perpendicular to the horizontal plane.
2. The X-ray imaging system with precise zero return function according to claim 1, characterized in that: The A sensor guide rail (3421) is in the form of a long groove structure. The A sensor guide rail (3421) comprises a groove bottom (3421a) and two groove side portions (3421b) symmetrically arranged on opposite sides of the groove bottom (3421a), and a hook portion (3421c) is formed on a side of each groove side portion (3421b) away from the groove bottom (3421a); the A sliding seat (3423) comprises a seat body (3423a), a seat body screw (3423b) arranged on the seat body (3423a), and a seat body nut (3423c) threadedly connected to the seat body screw (3423b), and the seat body nut (3423c) cooperates with a stopper of the hook portion (3421c) and is slidably arranged in the groove cavity of the A sensor guide rail (3421).
3. The X-ray imaging system with precise zero return function according to claim 2, characterized in that: The seat body (3423a) comprises a slide plate portion (3423aa), two side wing portions (3423ab) and a sensor mounting portion (3423ac); the slide plate portion (3423aa) is slidably matched with the A sensor guide rail (3421); the two side wing portions (3423ab) are symmetrically arranged on both sides of the slide plate portion (3423aa) along the length direction of the A sensor guide rail (3421); the two side wing portions (3423ab) are respectively matched with the A tightening pin stops of two A tightening adjustment assemblies (3422); the sensor mounting portion (3423ac) is arranged on the slide plate portion (3423aa) and is located between the two side wing portions (3423ab); and the sensor mounting portion (3423ac) is connected to the A photoelectric sensor (343).
4. The X-ray imaging system with precise zero return function according to claim 3, characterized in that: The slide plate portion (3423aa) is provided with four screw penetration holes (3423ad) for allowing the seat body screws (3423b) to penetrate therethrough, wherein two screw penetration holes (3423ad) form one group, and the remaining two screw penetration holes (3423ad) form another group.
5. The X-ray imaging system with precise zero return function according to claim 3, characterized in that: The sensor mounting portion (3423ac) is provided with four adjustment holes (3423ae) for mounting the A photoelectric sensor (343), wherein two adjustment holes (3423ae) constitute one group, and the remaining two adjustment holes (3423ae) constitute another group.
6. The X-ray imaging system with precise zero return function according to claim 1, characterized in that: The A fixing bracket (3422a) comprises a clamping connection portion (3422aa) fixing the A sensor guide rail (3421) to the A vertical moving frame (31); one side of the clamping connection portion (3422aa) is bent and extended to form a limiting portion (3422ab); the other side of the clamping connection portion (3422aa) is bent and extended to form a stopping portion (3422ac); the limiting portion (3422ab) abuts against the end of the A sensor guide rail (3421); and the A fixing pin (3422b) is threadedly penetrated on the stopping portion (3422ac).
7. The X-ray imaging system with precise zero return function according to claim 1, characterized in that: The A zero-position sensing sheet (341) comprises a first plate portion (3411), a second plate portion (3412) and a third plate portion (3413) which are vertically connected in sequence, and the first plate portion (3411) is arranged on the A deflection end plate (322); the A photoelectric sensor (343) comprises a sensor body (3431), a light-emitting arm (3432) arranged on the sensor body (3431) and a photosensitive arm (3433) arranged on the sensor body (3431), the photosensitive arm (3433) and the light-emitting arm (3432) are arranged opposite to each other, and a gap between the light-emitting arm (3432) and the photosensitive arm (3433) allows the third plate portion (3413) to pass through.
8. The X-ray imaging system with precise zero return function according to claim 1, characterized in that: The A deflection driver (35) comprises a motor, a driving wheel and a driven wheel (351); the motor is arranged on the A vertical moving frame (31); the driving wheel is arranged on the output end of the motor; the driven wheel (351) is sleeved and fixed on the A pin shaft (323); and the driven wheel (351) is drivingly connected to the driving wheel.
9. The X-ray imaging system with precise zero return function according to claim 1, characterized in that: A detector track (424) is provided on the B horizontal beam (421); the length direction of the detector track (424) is parallel to the length direction of the B horizontal beam (421); and the detector track (424) is slidably matched with the flat-panel detector (43).
10. The X-ray imaging system with precise zero return function according to claim 1, characterized in that: The X-ray emitting device (3) further comprises a mounting frame (36) for mounting the X-ray source (33), wherein the mounting frame (36) is arranged on the A horizontal beam (321).