A device for restricting the field of view of x-rays and a detection apparatus thereof

Abstract

The application relates to the technical field of X-ray field range adjustment, in particular to a device capable of restraining the X-ray field range and a detection equipment thereof; the device comprises a beam-out plate, a shifting piece, an inner sliding piece and an outer sliding piece, a through beam-out groove is formed in the middle of the beam-out plate, the shifting piece is rotationally arranged on one side of the beam-out plate, and a through groove is formed in the middle of the shifting piece; two arc-shaped limiting grooves on the shifting piece are matched with limiting column I and limiting column II on the inner sliding piece and the outer sliding piece respectively, the single rotation of the shifting piece simultaneously restrains the relative linear sliding of the inner sliding piece and the outer sliding piece, the square adjusting groove formed by the groove I and the groove II continuously changes in size along with the relative sliding of the two sliding pieces, the X-ray field range is correspondingly enlarged or reduced, and the shooting demand of different field ranges for different shooting parts is met; meanwhile, the layering arrangement of the shifting piece, the inner sliding piece and the outer sliding piece is favorable for realizing the field adjustment and compact integration in the limited installation space.

Description

Technical Field

[0001] This invention relates to the field of X-ray field of view adjustment technology, specifically to a device and its detection equipment that can constrain the X-ray field of view. Background Technology

[0002] In medical X-ray imaging equipment such as DR, it is usually necessary to shield and constrain the X-rays emitted from the X-ray tube so that the emitted X-rays form a field of view adapted to the area to be imaged, in order to reduce the extra radiation to areas that do not need to be imaged and meet the imaging needs of different parts. Therefore, the control of the X-ray field of view is an important part of medical X-ray imaging equipment, and the resulting radiation range needs to be adapted to the actual area to be imaged.

[0003] In existing X-ray beam confinement devices, some devices adopt a fixed field of view, and the size of the X-ray field of view formed after assembly is basically determined. In actual use, due to the differences in the size of different imaging parts and the required irradiation range, when the imaging object or imaging part changes, the X-ray field of view needs to be adjusted accordingly to the actual area to be imaged, so that the same beam confinement device can take into account the imaging needs of different parts for different field of view ranges.

[0004] However, the above-mentioned methods of beam confinement for X-rays still have the following drawbacks: In medical X-ray imaging equipment such as DR, it is usually necessary to use a beam confinement structure to block and constrain the X-rays emitted from the X-ray tube in order to form the required X-ray field of view for imaging; however, the size of the X-ray field of view formed by existing beam confinement devices with fixed fields of view is basically fixed after assembly. When the irradiation range requirements of different imaging sites change, the existing field of view is difficult to adjust accordingly, making it difficult to adjust the X-ray irradiation range according to the actual area to be imaged, thus making it difficult to meet the imaging requirements of different parts for different field of view ranges; although some adjustable beam confinement devices can change the size of the X-ray field of view, their overall volume is large, which is not conducive to compact layout and integrated assembly in the limited installation space inside the X-ray imaging equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a device and its detection equipment that can constrain the field of view of X-rays, so as to solve the problem that existing beam-limiting devices are difficult to balance field of view adjustment and compact integration.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solution: a device for constraining the field of view of X-rays, including a beam exit plate, a lever, an inner slider and an outer slider; the beam exit plate has a through beam exit groove in the middle, the lever is rotatably disposed on one side of the beam exit plate, and the lever has a through groove in the middle.

[0007] The inner and outer sliders are sequentially arranged on the side of the lever away from the output plate. The inner and outer sliders are slidably connected and slide relative to each other along a straight line to form an adjustable square adjustment groove.

[0008] The adjustment slot, through slot, and beam exit slot are arranged sequentially along the X-ray beam exit direction.

[0009] The paddle has two limiting grooves on one side facing the inner and outer slides. The inner slide is provided with a limiting post one, and the outer slide is provided with a limiting post two. The limiting post one slides in cooperation with one of the limiting grooves, and the limiting post two slides in cooperation with the other limiting groove.

[0010] Preferably, the two limiting grooves are symmetrically arranged along the circumference of the lever, and both limiting grooves are arc-shaped.

[0011] Preferably, the inner slide has a first groove and the outer slide has a second groove; the concave ends of the first and second grooves are both right angles, and the first and second grooves together form the square adjustment groove.

[0012] An X-ray beam-limiting window detection device includes a detection stage, with a detection mechanism and a calibration mechanism disposed on the upper side of the detection stage. The detection mechanism includes a light source, a positioning frame, a busbar assembly, and a detection plate, and the calibration mechanism includes a calibration plate and a range extender assembly.

[0013] The testing platform is equipped with a positioning frame, two light sources, a calibration plate, a busbar assembly, a range extender assembly, and a testing plate.

[0014] The positioning frame and calibration plate are located on the light output paths of the two light sources, respectively. The positioning frame is used to install the constraint mechanism to be tested.

[0015] The junction assembly includes a junction cover, two reflectors 1 and one reflector 2. The front side of the junction cover has two light inlet slots corresponding to the positioning frame and the calibration plate, respectively, and the rear side of the junction cover has a light outlet slot. The two reflectors 1 are respectively set to correspond to the two light inlet slots. The reflector 2 is rotatably set between the two reflectors 1 and selectively directs the light transmitted by one of the reflectors 1 to the light outlet slot at different rotation positions.

[0016] The range extender includes multiple sets of positioning columns spaced apart on the detection table along the light emission direction of the light emission slot and multiple focusing chambers. The multiple sets of positioning columns are used for detachable installation of the focusing chambers, and each focusing chamber is provided with multiple reflectors. The multiple focusing chambers can be selectively connected to the common light emission path between the light emission slot and the detection plate, so as to change the basic propagation distance between the light emission slot and the detection plate by changing the number of focusing chambers connected.

[0017] The detection plate is movable on the detection stage along the light emission direction of the light emission slot.

[0018] Preferably, the detection platform is provided with a guide rail and a moving stage. The guide rail extends along the light emission direction of the light emission slot, the moving stage is slidably mounted on the guide rail, and the detection plate is mounted on the moving stage.

[0019] Preferably, each set of positioning columns includes two positioning columns arranged symmetrically on the left and right. The left and right sides of the focusing chamber are respectively provided with docking grooves. The two docking grooves are respectively slidably engaged with the upper section of the corresponding set of positioning columns, so that the focusing chamber can be detachably installed on the corresponding set of positioning columns. The focusing chamber has a through channel running from front to back and is provided with four reflectors. The four reflectors are divided into two groups, front and back. Each group of reflectors includes two reflectors arranged on the left and right. The four reflectors form a refracting light path extending sequentially in the left-right direction, the rear direction, the reverse left-right direction, and the rear direction again inside the focusing chamber, so that the light entering from the front end of the focusing chamber increases the propagation distance and is emitted from the rear end of the focusing chamber.

[0020] Preferably, the multiple focusing chambers are detachably installed on different sets of positioning columns. The multiple focusing chambers installed on different sets of positioning columns correspond sequentially along the light emission direction of the light emission slot. The foldback propagation strokes formed by the multiple focusing chambers connected to the common light emission path between the light emission slot and the detection plate are cumulative. The detection plate moves continuously along the light emission direction of the light emission slot to continuously change the position of the detection plate relative to the busbar assembly in the current focusing chamber installation state.

[0021] Preferably, the two light sources are symmetrically arranged at the front end of the testing platform, the positioning frame is located behind one of the light sources, and the calibration plate is located behind the other light source. The light emitted by the two light sources propagates in a front-to-back direction. The positioning frame has a through mounting groove for the front and back to be inserted and positioned. When the constraint mechanism under test is installed in the mounting groove, its beam outlet plate faces the converging assembly.

[0022] Preferably, the combiner assembly further includes two focusing tubes, and a light inlet channel is opened inside the combiner cover. The two light inlet slots and the light outlet slot are all connected to the light inlet channel. The two focusing tubes are respectively arranged on the front side of the combiner cover and correspond one-to-one with the two light inlet slots. Each focusing tube has a channel that runs through the front and back and is connected to the corresponding light inlet slot. Two reflectors are respectively connected to the inner wall of the light inlet channel, and reflectors are rotatably arranged in the light inlet channel and correspond to the light outlet slot.

[0023] Preferably, the calibration plate is provided with a cross-shaped component; the front side of the detection plate is provided with a detection groove, which is square, and the square boundary of the detection groove forms a size and contour detection reference for the square projection; a central column is provided in the detection groove, which forms a position detection reference for the projection center; when the constraint mechanism to be tested is installed in the mounting groove of the positioning frame, the cross-shaped component in the calibration plate and the cross-shaped cursor plate in the constraint mechanism to be tested are on the same reference plane.

[0024] Compared with the prior art, the beneficial effects of this application are as follows: 1. This invention utilizes two arc-shaped limiting grooves on the lever to engage with limiting posts one and two on the inner and outer sliders, respectively. This allows a single rotation of the lever to simultaneously constrain the inner and outer sliders to slide relative to each other along a straight line. Furthermore, the square adjustment groove formed by grooves one and two continuously changes size as the two sliders slide relative to each other, thereby expanding or shrinking the X-ray field of view accordingly to meet the different field of view requirements of different imaging locations. At the same time, the stacked arrangement of the lever, inner slider, and outer slider facilitates field of view adjustment and compact integration within a limited installation space.

[0025] 2. This invention allows multiple focusing chambers to be connected to the optical path between the combiner assembly and the detection board, and utilizes the folded-back optical path within the focusing chamber to progressively increase the basic propagation path. This allows part of the required propagation path to be obtained through optical path folding, rather than relying entirely on the backward movement of the detection board. Simultaneously, the moving stage drives the detection board to move continuously back and forth along the guide rail, continuously compensating for the increased propagation path after the focusing chamber is connected. The detection distance is also adjusted while maintaining the current focusing chamber installation state. This allows the projection formed by the small-aperture beam-limiting window to be kept at a scale that is easy to observe and compare, while controlling the longitudinal length of the detection equipment and the adjustment range of the detection position. This improves the reliability of identifying and judging its size and contour deviations.

[0026] 3. This invention allows the reference branch where the calibration plate is located and the detection branch where the constraint mechanism under test is located to be selectively connected to the same rear optical path via the same reflector II. This enables the two branches to propagate to the detection plate under the same conditions of the focusing chamber installation state and the detection plate position. After the propagation journey and the position adjustment of the detection plate are completed, the center position of the current detection state is first verified using the cross-shaped component in the reference branch. After the verification meets the requirements, the focusing chamber installation state and the detection plate position remain unchanged, and only the reflector II is switched to perform the detection of the branch under test. This allows the judgment of the projection center under test to be based on the verified center reference, reducing the uncertainty of the judgment caused by the unconfirmed center position of the current detection state, and improving the consistency and reliability of center detection and judgment under different small opening states. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the constraint mechanism structure of the present invention.

[0028] Figure 2 This is an exploded view of the constraint mechanism structure of the present invention.

[0029] Figure 3 This is an exploded view of the structure of the paddle, inner slider, and outer slider.

[0030] Figure 4This is a schematic diagram of the paddle mechanism.

[0031] Figure 5 This is a schematic diagram of the internal sliding plate structure.

[0032] Figure 6 This is a schematic diagram of the outer slider structure.

[0033] Figure 7 This is a schematic diagram of the regulating groove structure in the closed state.

[0034] Figure 8 This is a schematic diagram of the regulating groove structure in a semi-open state.

[0035] Figure 9 This is a schematic diagram of the adjustment groove structure in its fully open state.

[0036] Figure 10 This is a schematic diagram of the detection mechanism of the present invention.

[0037] Figure 11 This is a frontal cross-sectional view of the testing facility structure.

[0038] Figure 12 This is a top-view cross-sectional diagram of the testing facility structure.

[0039] Figure 13 This is a schematic diagram of the guide rail structure.

[0040] Figure 14 This is a schematic diagram of the detection plate structure.

[0041] Figure 15 This is a schematic diagram of the light-concentrating chamber structure.

[0042] Figure 16 This is a top-view cross-sectional diagram of the light-concentrating chamber structure.

[0043] Figure 17 This is a schematic diagram of the manifold structure.

[0044] Figure 18 This is a schematic diagram of the top cross-section of the manifold structure.

[0045] Figure 19 This is a schematic diagram of the second adjustment state of the reflector structure.

[0046] Figure 20 This is a schematic diagram of the positioning frame structure.

[0047] Figure 21 This is a schematic diagram of the calibration plate structure.

[0048] Explanation of reference numerals in the attached drawings: 1. Constraint mechanism; 11. Bundle tube; 12. Bundle exit plate; 121. Bundle exit groove; 13. Dial lever; 14. Dial plate; 141. Through groove; 142. Limiting groove; 15. Crosshair cursor plate; 16. Inner slide; 161. Limiting post one; 162. Groove one; 17. Outer slide; 171. Limiting post two; 172. Groove two; 18. Slide groove; 19. Adjustment groove; 2. Detection table; 3. Detection mechanism; 31. Light source; 32. Positioning frame; 321. Mounting groove 33. Combinator assembly; 331. Combinator cover; 332. Concentrator tube; 333. Reflector 1; 334. Reflector 2; 335. Light inlet channel; 336. Light inlet slot; 337. Light outlet slot; 34. Guide rail; 35. Moving stage; 36. Detection plate; 361. Detection slot; 362. Center column; 4. Calibration mechanism; 41. Calibration plate; 411. Cross component; 42. Range extender assembly; 421. Concentrator chamber; 422. Docking slot; 423. Reflector 3; 424. Positioning column. Detailed Implementation

[0049] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0050] Example 1 In medical X-ray imaging equipment such as DR, it is usually necessary to use a beam-limiting structure to block and constrain the X-rays emitted from the X-ray tube in order to form the required X-ray field of view for imaging. However, the size of the X-ray field of view formed by existing beam-limiting devices with fixed fields of view is basically fixed after assembly. When the irradiation range requirements of different imaging sites change, the existing field of view is difficult to adjust accordingly, making it difficult to adjust the X-ray irradiation range according to the actual area to be imaged, thus failing to meet the imaging requirements of different parts for different field of view ranges. Although some adjustable beam-limiting devices can change the size of the X-ray field of view, their overall size is large, which is not conducive to compact layout and integrated assembly in the limited installation space inside the X-ray imaging equipment.

[0051] like Figures 1 to 9A device for constraining the field of view of X-rays, the constraining mechanism 1 including a focusing tube 11, a beam exiting plate 12, a dial 13, a dial 14, a crosshair 15, an inner slider 16, and an outer slider 17; the beam exiting plate 12 is detachably installed at the lower end of the focusing tube 11, the dial 14 is rotatably disposed on the side of the beam exiting plate 12 near the inside of the focusing tube 11, and the dial 13 is fixedly disposed on the outer peripheral surface of the dial 14; the side of the dial 14 away from the beam exiting plate 12 is sequentially provided with An inner slider 16 and an outer slider 17 are provided. The outer slider 17 is slidably disposed on the side of the inner slider 16 away from the beam outlet plate 12. The inner slider 16 and the outer slider 17 are slidably connected and slide relative to each other along a straight line. A through beam outlet groove 121 is opened in the middle of the beam outlet plate 12. The beam outlet groove 121 is square. A crosshair cursor plate 15 is detachably installed in the beam outlet groove 121. The crosshair cursor plate 15 is made of transparent acrylic material and has a cross-shaped pattern.

[0052] like Figures 3 to 9 The paddle 14 has a through groove 141 in the middle. The through groove 141 is square and its size is smaller than that of the outlet groove 121, and the two sizes are similar. The paddle 14 has two limiting grooves 142 symmetrically arranged in the circumferential direction on the side away from the outlet plate 12. Both limiting grooves 142 are arc-shaped.

[0053] like Figure 1 and Figure 2 The focusing tube 11 and the exiting plate 12 are provided with a sliding groove 18. The sliding groove 18 extends along the outer periphery of the focusing tube 11 and the exiting plate 12. The sliding groove 18 is slidably engaged with the dial 13, and allows one end of the dial 13 away from the dial 14 to extend out of the focusing tube 11. The extension length of the sliding groove 18 along the outer periphery of the focusing tube 11 and the exiting plate 12 is about one-quarter of the outer periphery of the exiting plate 12.

[0054] like Figures 3 to 9 The inner slide plate 16 is fixedly provided with a limiting post 161 on the side near the output plate 12. The limiting post 161 slides in cooperation with one of the limiting grooves 142 on the lever 14. The inner slide plate 16 is provided with a groove 162 at the end away from the limiting post 161. The concave end of the groove 162 is at a right angle, and the tip of the right angle points to the limiting post 161.

[0055] like Figures 3 to 9The outer slider 17 is fixedly provided with a second limiting post 171 on the side near the beam exit plate 12. The second limiting post 171 slides in cooperation with another limiting groove 142 on the lever 14. The outer slider 17 is provided with a second groove 172 at the end away from the second limiting post 171. The concave end of the second groove 172 is at a right angle, and the tip of the right angle points to the second limiting post 171. The first groove 162 and the second groove 172 together form an adjustment groove 19, which is square. The adjustment groove 19, the through groove 141 and the beam exit groove 121 are arranged in sequence along the beam exit direction of the X-ray. The inner slider 16 and the outer slider 17 are both made of copper, and the lever 14 is made of aluminum.

[0056] Working principle of constraint mechanism 1: When it is necessary to adjust the X-ray field of view, the dial 13 is moved along the slide groove 18, and the dial 13 drives the dial piece 14 to rotate relative to the beam output plate 12; as the dial piece 14 rotates, the two arc-shaped limiting grooves 142 act on the limiting post 161 and the limiting post 271 respectively, so that the limiting post 161 and the limiting post 271 slide along the corresponding limiting grooves 142, and respectively drive the inner slider 16 and the outer slider 17 to slide relative to each other in a straight line; When the lever 14 rotates along the direction of the enlarged adjustment groove 19, the inner slider 16 and the outer slider 17 move away from each other, and the square adjustment groove 19 formed by the groove 162 and the groove 172 gradually expands until the adjustment groove 19 reaches its maximum size, which is similar to the size of the through groove 141 on the lever 14; when the lever 14 rotates in the opposite direction, the inner slider 16 and the outer slider 17 move closer to each other, and the square adjustment groove 19 gradually shrinks until the adjustment groove 19 is completely closed. Since the adjustment groove 19, the through groove 141 and the beam exit groove 121 are arranged in sequence along the beam exit direction of the X-ray, the X-ray passes through the adjustment groove 19, the through groove 141 and the beam exit groove 121 in sequence and exits. The inner slider 16 and the outer slider 17 block the additional X-rays outside the adjustment groove 19, so that the field of view of the X-ray changes accordingly as the adjustment groove 19 expands or shrinks.

[0057] It should be emphasized that the core improvement of this embodiment lies in the following: by having two arc-shaped limiting grooves 142 on the lever 14 cooperate with the limiting post 161 and limiting post 171 on the inner slider 16 and outer slider 17 respectively, the single rotation of the lever 14 simultaneously constrains the inner slider 16 and outer slider 17 to slide relative to each other in a straight line, and the square adjustment groove 19 formed by the groove 162 and groove 172 continuously changes size as the two sliders slide relative to each other, thereby expanding or shrinking the X-ray field of view accordingly to adapt to the shooting needs of different shooting locations for different field of view ranges; at the same time, the stacked arrangement of the lever 14, inner slider 16 and outer slider 17 is conducive to achieving field of view adjustment and compact integration within a limited installation space.

[0058] Example 2 It is understandable that in Embodiment 1, the beam-limiting window under test can be continuously reduced from a large opening, forming a square projection of correspondingly varying size under different opening states. However, as the beam-limiting window under test gradually shrinks, the actual distance between its boundaries and the projection scale formed at the current detection position decrease accordingly. At this time, under the same or similar absolute deviation, the smaller boundary position deviation accounts for a larger proportion relative to the current window size, and its influence on the window size and contour state is more obvious, thus requiring more accurate identification. The reduced projection scale makes it more difficult to directly observe and reliably identify minute boundary deviations. In order to keep the projection formed by the smaller window at a scale that is easy to detect, it is usually necessary to increase the effective travel distance of light from the beam-limiting window under test to the detection position. If the increase in this travel distance mainly depends on the detection position continuously moving away from the beam-limiting window under test, the required increased travel distance will be converted into the actual backward movement distance of the detection position. This causes the required structural arrangement length and detection position adjustment range of the detection equipment in the front-back direction to increase accordingly as the window further shrinks, thereby increasing the difficulty of performing full-travel detection during the continuous change of the beam-limiting window under test from a large opening to a small opening.

[0059] like Figures 10 to 21 An X-ray beam-limiting window detection device includes a detection stage 2, a detection mechanism 3 and a calibration mechanism 4 disposed on the upper side of the detection stage 2. The detection mechanism 3 includes a light source 31, a positioning frame 32, a busbar assembly 33 and a detection plate 36. The calibration mechanism 4 includes a calibration plate 41 and a range extender assembly 42. The detection stage 2 is provided with the busbar assembly 33, a guide rail 34, a moving stage 35, the detection plate 36 and the range extender assembly 42. The guide rail 34 is fixedly disposed on the upper side of the detection stage 2 and extends in the front-back direction. The moving stage 35 is slidably disposed on the guide rail 34. The detection plate 36 is fixedly disposed on the upper side of the moving stage 35.

[0060] like Figures 10 to 12 , Figure 15 and Figure 16The range extender assembly 42 includes a focusing chamber 421, a reflector 423, a docking groove 422, and positioning posts 424. Multiple sets of positioning posts 424 are evenly arranged along the front-to-back direction on the testing platform 2. Each set of positioning posts 424 includes two symmetrically arranged positioning posts 424, which are respectively located on the left and right sides of the guide rail 34. The lower ends of the positioning posts 424 are fixedly connected to the testing platform 2. The focusing chamber 421 has symmetrically arranged docking grooves 422 on its left and right sides. Each docking groove 422 slides into the upper section of a corresponding set of positioning posts 424. Two symmetrical positioning posts 424 are used to jointly position the focusing chamber 421. The focusing chamber 421 can be detachably installed on a corresponding set of positioning posts 424. Multiple focusing chambers 421 are provided, and multiple focusing chambers 421 can be detachably installed on different sets of positioning posts 424 distributed in the front-back direction, and can be installed on different sets of positioning posts 424 at the same time. After installation, the multiple focusing chambers 421 are arranged in a front-back sequence along the light output direction of the busbar assembly 33, and the focusing chambers 421 installed on the positioning posts 424 are located between the busbar assembly 33 and the detection plate 36.

[0061] like Figure 15 and Figure 16 The light-concentrating chamber 421 has a through channel running from front to back. Four reflectors 423 are fixedly installed inside the light-concentrating chamber 421. The four reflectors 423 are divided into two symmetrical groups, and each group of reflectors 423 includes two reflectors 423 distributed from left to right.

[0062] The working principle of the range extender 42 is as follows: When the beam-limiting window under test gradually shrinks, in order to keep the projection formed at the detection plate 36 at the size required for the current test, while keeping the number of light-concentrating chambers 421 unchanged, the moving stage 35 moves backward along the guide rail 34 and moves the detection plate 36 away from the combiner assembly 33, so that the travel distance of the light from the combiner assembly 33 to the detection plate 36 continuously increases, and the projection formed on the detection plate 36 by the beam-limiting window under test expands accordingly; when the moving stage 35 moves forward along the guide rail 34, the detection plate 36 moves closer to the combiner assembly 33, and the travel distance of the light from the detection plate 36 continuously decreases accordingly. When it is necessary to further increase the propagation distance of light based on the current installation state of the focusing chamber 421, a focusing chamber 421 is added to a set of positioning posts 424 between the combiner assembly 33 and the detection plate 36. The docking grooves 422 on both sides of the focusing chamber 421 slide and cooperate with the upper section of the corresponding positioning posts 424, so that the two symmetrical positioning posts 424 jointly install and position the focusing chamber 421. After the light emitted from the combiner assembly 33 enters the front end of the focusing chamber 421, it is first guided to the right by the reflector 3 423 on the front left side to the reflector 3 423 on the front right side, then guided to the rear right side by the reflector 3 423 on the front right side, then guided to the left by the reflector 3 423 on the rear right side, and then guided to the left by the reflector 3 423 on the rear left side, and then guided to the rear again by the reflector 3 423 on the rear left side, so that the light is emitted from the rear end of the focusing chamber 421 after being reflected back. When multiple focusing chambers 421 are installed on different groups of positioning columns 424 at the same time, the light emitted from the rear end of the front focusing chamber 421 continues to enter from the front end of the rear focusing chamber 421, and passes through the folding optical path inside each focusing chamber 421 in sequence, so that the increased folding propagation distance of each focusing chamber 421 is accumulated in sequence; therefore, by increasing the number of focusing chambers 421 in the access optical path, the basic propagation distance of light from the combiner assembly 33 to the detection board 36 can be increased step by step; Because the addition of the focusing chamber 421 changes the direct propagation of the corresponding light segment from the front-to-back direction to a reflected propagation within the focusing chamber 421, it increases the actual travel distance of the light from the combiner assembly 33 to the detection plate 36. However, the additional travel distance required for the current projection does not necessarily have to be the same as the additional travel distance added by the addition of the focusing chamber 421. Therefore, after the focusing chamber 421 is added, the moving stage 35 can move the detection plate 36 forward along the guide rail 34 within the position allowed by the current installation state of the focusing chamber 421, thereby compensating for the increased travel distance through continuous positional changes of the detection plate 36. The position of the detection plate 36 is determined based on the projection state at the detection plate 36. Subsequently, with the number of current focusing chambers 421 remaining unchanged, as the beam-limiting window to be tested continues to shrink, the moving stage 35 moves the detection plate 36 backward along the guide rail 34 to continuously increase the travel distance of light propagating to the detection plate 36. When it is necessary to increase the basic propagation distance again, a new focusing chamber 421 can be added on the positioning post 424 corresponding to the currently installed focusing chamber 421 and the detection plate 36, and the newly added propagation distance can be continuously compensated by moving the detection plate 36 forward along the guide rail 34.

[0063] It should be emphasized that the core improvement of this embodiment lies in the following: by enabling multiple focusing chambers 421 to be connected to the optical path between the combiner assembly 33 and the detection plate 36 respectively, and by using the folded-back optical path within the focusing chamber 421 to gradually increase the basic propagation path, part of the required propagation path is obtained by the folded-back optical path, instead of relying entirely on the backward movement of the detection plate 36; at the same time, by using the moving stage 35 to drive the detection plate 36 to move continuously back and forth along the guide rail 34, the propagation path increased after the focusing chamber 421 is connected is continuously compensated, and the detection distance is adjusted in the current installation state of the focusing chamber 421. Thus, while controlling the longitudinal arrangement length of the detection equipment and the adjustment range of the detection position, the projection formed by the small-aperture beam-limiting window is kept at a scale that is easy to observe and compare, thereby improving the reliability of identifying and judging its size and contour deviation.

[0064] It should be noted that, in specific implementation, the zigzag propagation stroke formed by each focusing chamber 421, the setting position of each group of positioning columns 424 in the front-back direction, and the adjustable stroke of the moving stage 35 along the guide rail 34 can be matched with the detection range of the beam-limiting window to be tested and the required projection scale at the detection plate 36. This ensures that after the addition of the focusing chamber 421, the detection plate 36 can still move forward within the position allowed by the current installation state of the focusing chamber 421, continuously compensate for the increased propagation stroke, and continue to adjust backward as the beam-limiting window to be tested shrinks after the compensation is completed. The above matching does not require that the increased propagation stroke of each focusing chamber 421 be exactly the same, nor does it require that the increased propagation stroke of the focusing chamber 421 and the single compensation stroke of the detection plate 36 form a fixed numerical correspondence. It is only necessary to ensure that the discrete extension of the focusing chamber 421 and the continuous adjustment of the detection plate 36 can meet the detection adjustment needs under different opening states of the beam-limiting window to be tested.

[0065] Example 3 Understandably, in Embodiment 2, as the beam-limiting window to be tested gradually shrinks, the projection formed by the smaller window can be kept at a scale that is easy to detect by changing the basic propagation path of the light and readjusting the position of the detection plate 36. However, this adjustment process is mainly used to match the current effective propagation path with the required projection scale. The adjustment result itself cannot simultaneously indicate whether the center position of the projection in the current detection state meets the detection requirements. The center position of the beam-limiting window to be tested is itself an object that needs to be judged in the detection process. If the center position is directly evaluated based on the projection to be tested, it is difficult to confirm whether the obtained center position result can independently characterize the center state of the beam-limiting window to be tested, thereby affecting the consistency and reliability of continuous detection and judgment of the center position of the beam-limiting window to be tested under different small opening states.

[0066] like Figures 10 to 13The front end of the testing platform 2 is symmetrically fixed with two light sources 31 by a bracket. A positioning frame 32 is set behind the left light source 31 and is fixedly set on the upper side of the testing platform 2. A calibration plate 41 is set behind the right light source 31 and is fixedly set on the upper side of the testing platform 2. A busbar assembly 33 is set behind the positioning frame 32.

[0067] like Figures 10 to 13 and Figure 20 The positioning frame 32 has a through mounting groove 321, which is provided for the insertion and positioning of the beam-gathering tube 11 of the constraint mechanism 1 to be tested; when the constraint mechanism 1 to be tested is installed in the mounting groove 321, the beam-exiting plate 12 on the beam-gathering tube 11 is set to face rearward.

[0068] like Figures 10 to 13 and Figure 21 A cross member 411 is fixedly installed inside the calibration plate 41. When the constraint mechanism 1 to be tested is installed in the mounting slot 321 of the positioning frame 32, the cross member 411 inside the calibration plate 41 and the cross cursor plate 15 in the constraint mechanism 1 to be tested are on the same reference plane.

[0069] like Figures 10 to 12 , Figures 17 to 19 The combiner assembly 33 includes a combiner cover 331, two focusing tubes 332, two reflectors 333, and one reflector 334. The combiner cover 331 has an internal light inlet channel 335, two symmetrical light inlet slots 336 on the left and right sides of its front, and a light outlet slot 337 in the center of its rear. Both the light inlet slots 336 and the light outlet slot 337 are connected to the light inlet channel 335 and the outside. The two focusing tubes 332 are symmetrically and detachably installed on the front of the combiner cover 331, corresponding one-to-one with the two light inlet slots 336. Each focusing tube 332 has a through-hole that communicates with its corresponding light inlet slot 336. The left-side focusing tube 332 is located behind the positioning frame 32, with its front end close to the rear end of the focusing tube 11 mounted on the positioning frame 32; the right-side focusing tube 332 is located behind the calibration plate 41; two reflectors 333 are symmetrically arranged in the light inlet channel 335 and correspond one-to-one with the two light inlet slots 336 respectively, and both reflectors 333 are fixedly connected to the inner wall of the light inlet channel 335; a second reflector 334 is arranged between the two reflectors 333 and is rotatably connected to the junction box 331, and the second reflector 334 is correspondingly arranged with the light outlet slot 337; the installed focusing chamber 421 and the detection plate 36 are located behind the light outlet slot 337 in sequence.

[0070] like Figure 10 , Figure 12 and Figure 13 The detection plate 36 has a detection groove 361 on the front side. The detection groove 361 is square, and a central column 362 is fixedly installed inside the detection groove 361.

[0071] The working principle of calibration plate 41: After the constraint mechanism 1 under test is adjusted to the opening of the current beam-limiting window to be tested, and the adjustment of the number of current focusing chambers 421 and the compensation of the position of the detection plate 36 are completed, the current installation state of the focusing chambers 421 and the position of the detection plate 36 are kept unchanged. First, the second reflector 334 is rotated so that the second reflector 334 is in a position that can guide the light transmitted by the first reflector 333 on the right to the light outlet groove 337; the light emitted by the right light source 31 passes through the calibration plate 41 from front to back and is then directed by the right focusing tube 332. The light enters the light inlet channel 335 through the corresponding light inlet slot 336, and is then guided to the second reflector 334 via the first reflector 333 on the right side. The light is then guided to the light outlet slot 337 by the second reflector 334, and then propagated to the detection plate 36 through the currently installed focusing chamber 421. The projection center of the current reference branch is verified according to the correspondence between the cross projection center formed by the cross component 411 and the center position represented by the center column 362. When the positional relationship between the two meets the detection requirements, the branch under test is detected. If it does not meet the requirements, the branch under test is not detected for the time being. Once the center verification of the reference branch meets the testing requirements, the current installation state of the focusing chamber 421 and the position of the detection plate 36 remain unchanged. Only the second reflector 334 is rotated to switch the second reflector 334 to a position that can guide the light transmitted by the first reflector 333 on the left to the light exit slot 337. The light emitted by the left light source 31 enters the test constraint mechanism 1 from front to back, passes through the adjustment slot 19 and the through slot 141 in sequence, passes through the crosshair plate 15 installed in the beam exit slot 121, and is emitted from the beam exit slot 121, thereby forming a square projection corresponding to the current beam limiting window state and a crosshair projection used to indicate its center position. Subsequently, the light enters the light entrance channel 335 through the left focusing tube 332 and the corresponding light entrance slot 336, and is then guided to the light exit slot 337 by the first reflector 333 and the second reflector 334 on the left in sequence, and is propagated to the detection plate 36 through the currently installed focusing chamber 421. After the square projection formed by the constraint mechanism 1 reaches the detection plate 36, the boundary of the square projection is compared with the boundary of the square detection groove 361 to detect the projection size and contour state formed by the current beam-limiting window, and the corresponding boundary position deviation is identified according to the correspondence between the two. At the same time, the center of the cross projection formed by the cross cursor plate 15 is compared with the center position represented by the center column 362 to detect the position state of the current projection center.

[0072] It should be emphasized that the core improvement of this embodiment lies in the following: by selectively connecting the reference branch where the calibration plate 41 is located and the detection branch where the constraint mechanism 1 under test is located to the same reflector 334 for sharing the same rear optical path, the two branches can propagate to the detection plate 36 under the same installation state of the focusing chamber 421 and the position of the detection plate 36. After completing the propagation journey and adjusting the position of the detection plate 36, the center position of the current detection state is first verified using the cross 411 in the reference branch. After the verification meets the requirements, the installation state of the focusing chamber 421 and the position of the detection plate 36 remain unchanged, and only the reflector 334 is switched to detect the branch under test. This allows the judgment of the projection center under test to be based on the verified center reference, reducing the uncertainty of the judgment caused by the unconfirmed center position of the current detection state, and improving the consistency and reliability of center detection and judgment under different small opening states.

[0073] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. A device for constraining the field of view of X-rays, characterized in that: It includes a beam outlet plate (12), a lever (14), an inner slider (16), and an outer slider (17); the beam outlet plate (12) has a through beam outlet groove (121) in the middle, and the lever (14) is rotatably disposed on one side of the beam outlet plate (12), and the lever (14) has a through groove (141) in the middle. The inner slide (16) and the outer slide (17) are sequentially arranged on the side of the lever (14) away from the output plate (12). The inner slide (16) and the outer slide (17) are slidably connected, and the two slide relative to each other along a straight line and together form a square adjustment groove (19) with adjustable size. The adjustment groove (19), the through groove (141) and the beam exit groove (121) are arranged sequentially along the beam exit direction of the X-rays; The paddle (14) has two limiting grooves (142) on one side facing the inner slide (16) and the outer slide (17). The inner slide (16) is provided with a limiting post one (161), and the outer slide (17) is provided with a limiting post two (171). The limiting post one (161) is slidably engaged with one of the limiting grooves (142), and the limiting post two (171) is slidably engaged with the other limiting groove (142).

2. The device for constraining the field of view of X-rays as described in claim 1, characterized in that: The two limiting grooves (142) are symmetrically arranged along the circumference of the lever (14), and both limiting grooves (142) are arc-shaped.

3. The device for constraining the field of view of X-rays as described in claim 1, characterized in that: The inner slide (16) has a groove 1 (162) and the outer slide (17) has a groove 2 (172); the concave ends of the groove 1 (162) and the groove 2 (172) are both right angles, and the groove 1 (162) and the groove 2 (172) together form the square adjustment groove (19).

4. A detection device for an X-ray beam-limiting window, applicable to the device for constraining the X-ray field of view as described in claim 1, characterized in that: The system includes a testing platform (2), a testing mechanism (3) and a calibration mechanism (4) on the upper side of the testing platform (2). The testing mechanism (3) includes a light source (31), a positioning frame (32), a busbar assembly (33) and a testing plate (36). The calibration mechanism (4) includes a calibration plate (41) and a range extender assembly (42). The testing station (2) is equipped with a positioning frame (32), two light sources (31), a calibration plate (41), a busbar assembly (33), a range extender assembly (42), and a testing plate (36). The positioning frame (32) and the calibration plate (41) are located on the light output paths of the two light sources (31), respectively. The positioning frame (32) is used to install the constraint mechanism (1) to be tested. The junction assembly (33) includes a junction cover (331), two reflectors (333), and a reflector (334). The junction cover (331) has two light inlet slots (336) on its front side, which correspond to the positioning frame (32) and the calibration plate (41), respectively. The junction cover (331) has a light outlet slot (337) on its rear side. The two reflectors (333) are respectively arranged corresponding to the two light inlet slots (336). The reflector (334) is rotatably arranged between the two reflectors (333) and selectively directs the light transmitted by one of the reflectors (333) to the light outlet slot (337) at different rotation positions. The range extender (42) includes multiple sets of positioning posts (424) spaced apart on the detection table (2) along the light emission direction of the light emission slot (337) and multiple focusing chambers (421). The multiple sets of positioning posts (424) are used for detachable installation of focusing chambers (421). Each focusing chamber (421) is provided with multiple reflectors (423). The multiple focusing chambers (421) can be selectively connected to the common light emission path between the light emission slot (337) and the detection plate (36) so as to change the basic propagation stroke between the light emission slot (337) and the detection plate (36) by changing the number of focusing chambers (421) connected. The detection plate (36) is movable on the detection stage (2) along the light emission direction of the light emission groove (337).

5. The X-ray beam-limiting window detection device as described in claim 4, characterized in that: The detection stage (2) is provided with a guide rail (34) and a moving stage (35). The guide rail (34) extends along the light emission direction of the light emission slot (337). The moving stage (35) is slidably disposed on the guide rail (34). The detection plate (36) is disposed on the moving stage (35).

6. The X-ray beam-limiting window detection device as described in claim 4, characterized in that: Each set of positioning posts (424) includes two positioning posts (424) arranged symmetrically on the left and right. The left and right sides of the focusing chamber (421) are respectively provided with docking grooves (422). The two docking grooves (422) are respectively slidably engaged with the upper section of the corresponding set of positioning posts (424), so that the focusing chamber (421) can be detachably installed on the corresponding set of positioning posts (424). The light-concentrating chamber (421) has a through-channel inside and four reflectors (423) are provided. The four reflectors (423) are divided into two groups, front and back. Each group of reflectors (423) includes two reflectors (423) arranged on the left and right. The four reflectors (423) form a refracting light path inside the light-concentrating chamber (421) that extends sequentially in the left-right direction, the rear direction, the opposite left-right direction, and the rear direction again, so that the light entering from the front end of the light-concentrating chamber (421) increases the propagation distance and is emitted from the rear end of the light-concentrating chamber (421).

7. The X-ray beam-limiting window detection device as described in claim 5, characterized in that: Multiple light-concentrating chambers (421) are detachably installed on different sets of positioning columns (424). The multiple light-concentrating chambers (421) installed on different sets of positioning columns (424) are sequentially aligned along the light-emitting direction of the light-emitting slot (337). The foldback propagation strokes formed by the multiple light-concentrating chambers (421) connected to the common light-emitting path between the light-emitting slot (337) and the detection plate (36) are cumulative. The detection plate (36) moves continuously along the light emission direction of the light emission slot (337) to continuously change the position of the detection plate (36) relative to the busbar assembly (33) in the current installation state of the light-concentrating chamber (421).

8. The X-ray beam-limiting window detection device as described in claim 4, characterized in that: The two light sources (31) are symmetrically arranged at the front end of the detection table (2), the positioning frame (32) is arranged behind one of the light sources (31), and the calibration plate (41) is arranged behind the other light source (31). The light emitted by the two light sources (31) propagates in the direction from front to back. The positioning frame (32) has a through mounting groove (321) that runs from front to back. The mounting groove (321) is used for the insertion and positioning of the bundle tube (11) of the constraint mechanism (1) to be tested. When the constraint mechanism (1) to be tested is installed in the mounting groove (321), its output plate (12) faces the busbar assembly (33).

9. The X-ray beam-limiting window detection device as described in claim 8, characterized in that: The combiner assembly (33) also includes two light-concentrating tubes (332), and the combiner cover (331) has an inlet channel (335) inside. The two inlet slots (336) and the outlet slot (337) are all connected to the inlet channel (335). Two light-concentrating tubes (332) are respectively arranged on the front side of the manifold (331) and correspond one-to-one with the two light-inlet slots (336). Each light-concentrating tube (332) has a channel that runs through the front and back and is connected to the corresponding light-inlet slot (336). Two reflectors (333) are respectively connected to the inner wall of the light-inlet channel (335), and reflectors (334) are rotatably arranged in the light-inlet channel (335) and correspond to the light-outlet slot (337).

10. The X-ray beam-limiting window detection device as described in claim 8, characterized in that: The calibration plate (41) is provided with a cross-shaped component (411). The detection plate (36) has a detection groove (361) on the front side. The detection groove (361) is square, and the square boundary of the detection groove (361) forms a square projection size and contour detection reference. A central column (362) is provided in the detection groove (361), and the central column (362) forms a position detection reference for the projection center. When the constraint mechanism under test (1) is installed in the mounting slot (321) of the positioning frame (32), the cross part (411) in the calibration plate (41) and the cross cursor plate (15) in the constraint mechanism under test (1) are on the same reference plane.

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