Detector correction device and ray inspection system

Abstract

The invention discloses a detector correction device and a ray inspection system. The detector correction device comprises a first supporting seat; the bearing component is installed on the first supporting seat and provided with a bearing face, the bearing face is configured to be provided with a strip-shaped detector, the detector and the radiation source are oppositely arranged so as to receive a ray beam from the radiation source, and the projection of the ray beam on the detector is in a straight line shape; the bearing component is configured to move along a first direction which is parallel to the bearing surface and is crossed with the length direction of the detector relative to the first supporting seat, and the bearing component is also configured to rotate around a rotating axis which is vertical to a second direction of the bearing surface relative to the first supporting seat, so that the strip-shaped detector is aligned with the ray beam; and the driving mechanism is arranged on the first supporting seat, is connected with the bearing component and is configured to drive the bearing component to move relative to the first supporting seat.

Description

Technical Field

[0001] The invention relates to radiation scanning imaging detection technology, and in particular to a detector correction device and a ray inspection system. Background Art

[0002] The radiation inspection system for inspecting the cargo in the container / vehicle includes a radiation source that emits a radiation beam that passes through the inspected container / vehicle and a detector that is arranged opposite to the radiation source and receives the radiation beam. Between the radiation source and the detector is an inspection channel for the container / vehicle to pass through. The radiation emitted by the radiation source passes through a collimator and forms a long strip of radiation beam on the detector. The above-mentioned radiation beam forms a radiation beam plane perpendicular to the extension direction of the inspection channel. The container / vehicle passes through the above-mentioned radiation beam plane in the process of passing through the inspection channel, and the radiation beam continuously scans the above-mentioned container / vehicle.

[0003] The radiation beam penetrates the container / vehicle and forms an image on the detector that reflects the inspection result. The imaging quality is an important indicator of the radiation inspection system, and the imaging quality is directly related to the accuracy of the inspection. The imaging quality is affected by many factors, one of the most important factors is the alignment of the radiation source and the detector, more specifically the alignment of the radiation beam emitted by the radiation source and the radiation receiving surface of the strip detector. At this time, the radiation dose received by the detector is the largest and the image quality is the best. Otherwise, the image quality is affected, and the more deviation, the worse the image quality.

[0004] In the related art, there is often a problem that the imaging quality is poor due to misalignment between the detector and the radiation source. Summary of the invention

[0005] The present invention aims to provide a detector correction device and a radiation inspection system to improve the problem of poor imaging quality caused by misalignment between the detector and the radiation source in the related art.

[0006] According to one aspect of an embodiment of the present invention, the present invention provides a detector calibration device, which in some embodiments includes:

[0007] A first support seat;

[0008] a bearing component, mounted on the first support seat and having a bearing surface, the bearing surface being configured to mount a strip-shaped detector, the detector being arranged opposite to the radiation source to receive a radiation beam from the radiation source, the projection of the radiation beam on the detector being a straight line, the bearing component being configured to move relative to the first support seat along a first direction parallel to the bearing surface and intersecting with a length direction of the detector, and the bearing component being further configured to rotate relative to the first support seat around a rotation axis in a second direction perpendicular to the bearing surface, so as to align the strip-shaped detector with the radiation beam; and

[0009] The driving mechanism is arranged on the first supporting seat, connected to the bearing component, and configured to drive the bearing component to move relative to the first supporting seat.

[0010] In some embodiments, the bearing component is further configured to rotate relative to the first supporting base around a rotation axis in a third direction, and the third direction is parallel to the strip-shaped detector.

[0011] In some embodiments, the drive mechanism comprises:

[0012] a translational motion component mounted on the first support base and configured to move along a first direction relative to the first support base; and

[0013] The rotating component is installed on the translational motion component and is configured to rotate relative to the translational motion component around a rotation axis in the second direction. The rotating component is connected to the bearing component.

[0014] In some embodiments, the driving mechanism further comprises a slide rail mounted on the first support seat and extending along the first direction, and the translational motion component is mounted on the slide rail and is configured to be movable along the slide rail.

[0015] In some embodiments, the drive mechanism further comprises:

[0016] a first driving component, drivingly connected to the translational motion component to drive the translational motion component to move along a first direction; and / or

[0017] The second driving component is installed on the translation motion component and is transmission-connected with the rotating component to drive the rotating component to rotate around a rotation axis in a second direction.

[0018] In some embodiments, the detector calibration device further includes a controller, which is signal-connected to the first driving component and the detector, respectively, and is configured to:

[0019] The first driving component is controlled to drive the bearing component to move along the first direction, and the intensity of the rays detected by the detector during the movement is recorded, and then the bearing component is moved to a position where the intensity of the rays detected by the detector is the largest.

[0020] In some embodiments, the detector calibration device further includes a controller, which is signal-connected to the first driving component, the second driving component, and the detector, respectively, and is configured to:

[0021] Controlling the first driving component to drive the bearing component to move along the first direction, and recording the intensity of the radiation detected in the middle of the detector along the length direction of the detector, and then moving the bearing component to a position where the intensity of the radiation detected in the middle of the detector is the largest; and

[0022] The second driving component is controlled to drive the bearing component to rotate around the rotation axis in the second direction and record the intensity of the rays detected during the rotation of the detector, and then the bearing component is rotated to an angle at which the intensity of the rays detected by the detector is the maximum.

[0023] In some embodiments, the detector calibration device further comprises:

[0024] a visible light lamp configured to emit visible light parallel to or coincident with the beam of radiation toward the bearing surface; and

[0025] The third driving component is configured to drive the supporting component to rotate around a rotation axis in a third direction, so as to adjust the width of the light shadow irradiated by the visible light on the supporting surface or the detector to a minimum.

[0026] In some embodiments, the detector calibration device further comprises:

[0027] A camera component mounted on the carrier component and configured to capture light and shadow; and

[0028] The controller is signal-connected to the camera component and the third driving component respectively, and is configured to determine the width of the light and shadow according to the image taken by the camera component and control the rotation of the third driving component according to the width of the light and shadow to adjust the width of the light and shadow to the minimum.

[0029] According to another aspect of the present application, a radiographic inspection system, in some embodiments, includes:

[0030] The detector calibration device mentioned above;

[0031] a detector mounted on the bearing surface; and

[0032] The ray source is arranged opposite to the detector.

[0033] In some embodiments, the radiation inspection system further includes a collimator, which is disposed at the radiation emitting end of the radiation source, and has a strip-shaped slit that allows radiation to pass through so as to constrain the radiation emitted by the radiation source into a radiation beam, and the collimator is configured to adjust its position along a first direction relative to the radiation source.

[0034] In some embodiments, the radiation inspection system also includes a fourth driving component, which is configured to drive the collimator to adjust its position relative to the radiation source. The fourth driving component and the detector are respectively connected to the controller signal. The controller is configured to control the fourth driving component to drive the collimator to adjust its position, and record the intensity of the radiation detected by the detector during the process of adjusting the position of the collimator, and then adjust the collimator to the position where the radiation intensity detected by the detector is the largest.

[0035] By applying the technical solution of the present application, the detector correction device of the present embodiment can not only adjust the distance between the beam plane and the detector in the first direction, but also adjust the angle between the detector and the beam, which is not only conducive to improving the efficiency of detector correction, but also conducive to ensuring the accuracy of the position of the calibrated detector, so as to improve the intensity of the rays received by the detector and the detection accuracy of the radiation inspection system.

[0036] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] Figure 1 A schematic structural diagram of a ray inspection system according to an embodiment of the present invention is shown;

[0039] Figure 2 A schematic diagram of the top view of the structure of a ray inspection system according to an embodiment of the present invention is shown;

[0040] Figure 3 A schematic diagram of the structure of a radiographic inspection system in a first working condition according to an embodiment of the present invention is shown;

[0041] Figure 4 A partially enlarged schematic diagram showing a radiographic inspection system in a first working condition of an embodiment of the present invention;

[0042] Figure 5 A schematic diagram of the top view of the structure of a radiographic inspection system in a second working condition of an embodiment of the present invention is shown;

[0043] Figure 6 A schematic diagram of a first state of a position correction process of a detector of a ray inspection system in a second working condition of an embodiment of the present invention is shown;

[0044] Figure 7 A schematic diagram of a second state of a position correction process of a detector of a ray inspection system in a second working condition of an embodiment of the present invention is shown;

[0045] Figure 8 A schematic diagram of a third state of a position correction process of a detector of a ray inspection system in a second working condition of an embodiment of the present invention is shown;

[0046] Fig. 9A schematic diagram showing the structure of a ray inspection system according to some other embodiments of the present invention;

[0047] Fig.10 A schematic diagram showing the structure of a radiation inspection system according to some other embodiments of the present invention when the bearing surface is opposite to the radiation source;

[0048] Fig.11 A schematic diagram showing the structure of the radiation inspection system of other embodiments of the present invention when the bearing surface and the radiation source are not opposite to each other;

[0049] Fig.12 A control system block diagram of a radiographic inspection system according to some other embodiments of the present invention is shown. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0052] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0054] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0055] If there is no special explanation, the "include" and "comprising" mentioned in this application represent open-ended or closed-ended expressions. For example, "include" and "comprising" may represent that other components not listed may also be included or only listed components may be included or only listed components may be included.

[0056] If not specifically stated, in this application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true or exists and B is false or does not exist; A is false or does not exist and B is true or exists; or both A and B are true or exist.

[0057] Combination Figure 1 and 2 As shown, the radiation inspection system of this embodiment includes a radiation source 2 and a detector 9 opposite to the radiation source 2. An inspection channel is formed between the radiation source 2 and the detector 9, allowing the object to be inspected 5 to pass through.

[0058] The ray beam emitted by the ray source 2 gradually diffuses outward in a direction away from the ray source 2 to form a conical ray beam, that is, the cross section of the conical ray beam gradually increases in a direction away from the ray emission end. The ray inspection system also includes a collimator 4 arranged near the ray emission end of the ray source 2, and the collimator 4 has a strip slit that allows the rays to pass through. Only the rays in the conical ray beam that are opposite to the strip slit of the collimator 4 can be emitted to the detector 9, so the projection of the ray beam 21 passing through the collimator 4 on the detector 9 is a straight line, that is, the ray beam 21 after passing through the collimator 4 forms a ray beam plane perpendicular to the extension direction of the inspection channel.

[0059] In this embodiment, the detector 9 is in a strip shape. When the beam 21 is aligned with the detector 9, that is, when the projection of the beam 21 on the detector 9 is consistent with the length direction of the detector 9 and is aligned with the detector 9 in the width direction of the detector 9, the intensity of the radiation detected by the detector 9 is the largest, and the detection effect is also the best accordingly. In some embodiments, the detector 9 includes a plurality of crystals arranged in an array for sensing radiation.

[0060] In order to align the strip-shaped detector 9 with the radiation beam 21 and improve the problem of poor imaging quality caused by the misalignment of the detector 9 and the radiation beam 21 in the related art, the radiation inspection system of this embodiment includes a detector correction device, which includes a first support seat 8, a bearing component 6 and a driving mechanism 7.

[0061] The carrying component 6 is installed on the first supporting seat 8 and has a carrying surface 61. The carrying surface 61 is configured to install a strip-shaped detector 9. The carrying component 6 is configured to be movable relative to the first supporting seat 8 along a first direction parallel to the carrying surface 61 and intersecting with the length direction of the detector 9, and the carrying component 6 is also configured to be rotatable relative to the first supporting seat 8 around a rotation axis in a second direction perpendicular to the carrying surface 61 so as to align the strip-shaped detector 9 with the beam 21.

[0062] The driving mechanism 7 is disposed on the first supporting seat 8 and connected to the bearing component 6 . The driving mechanism 7 is configured to drive the bearing component 6 to move relative to the first supporting seat 8 .

[0063] Before the posture of the detector 9 is corrected, there is a certain deviation between the projection of the beam 21 on the detector 9 and the width direction of the detector 9 and / or there is a certain angle between the projection of the beam 21 on the detector 9 and the length direction of the detector 9. Such deviation and / or angle usually originates from the accumulation of errors when the radiographic inspection system is installed.

[0064] In some embodiments, the bearing surface 61 of the bearing component 6 is strip-shaped and matched with the detector 9 , and a plurality of crystals of the detector 9 are arranged in an array on the bearing surface 61 .

[0065] When the projection of the ray beam 21 on the detector 9 is parallel to the length direction of the detector 9, the first direction is consistent with the width direction of the detector 9. When the projection of the ray beam 21 on the detector 9 has a certain angle with the length direction of the detector 9, the first direction intersects with the length direction of the detector 9 and has a certain angle with the width direction of the detector 9.

[0066] The bearing member 6 drives the detector 9 to move in the first direction to adjust the distance between the detector 9 and the beam 21 in the width direction of the detector 9; the bearing member 6 drives the detector 9 to rotate around the rotation axis in the second direction to adjust the angle between the projection of the beam 21 on the detector 9 and the length direction of the detector 9. The detector calibration device of this embodiment can quickly and efficiently align the detector 9 with the beam 21 to ensure the accuracy of the position of the calibrated detector 9, which is conducive to improving the intensity of the radiation received by the detector 9 and the detection accuracy of the radiation inspection system.

[0067] In this embodiment, the radiation source 2 and the radiation beam 21 passing through the collimator 4 are fixed, and the detector 9 is aligned with the radiation beam 21 by adjusting the posture of the supporting component 6. The first direction is perpendicular to the radiation beam 21, and the second direction is parallel to the radiation beam 21.

[0068] Specifically, the ray beam 21 is roughly perpendicular to the horizontal inspection channel, the detector 9 is erected on a side of the inspection channel away from the radiation source 2, the first direction is roughly consistent with the extension direction of the inspection channel, and before correction, there is a certain distance between the detector 9 and the ray beam 21 in the extension direction of the inspection channel and / or the detector 9 deviates from the vertical direction by a certain angle. The supporting component 6 drives the detector 9 to move along the first direction to adjust the distance between the detector 9 and the ray beam 21 in the extension direction of the inspection channel; the supporting component 6 drives the detector 9 to rotate around the rotation axis in the second direction to adjust the angle between the detector 9 and the vertical direction, thereby realizing the alignment of the detector 9 and the ray beam 21.

[0069] In some embodiments, the beam 21 deviates from the extension direction of the detection channel perpendicular to the horizontal direction, that is, there is a certain angle between the beam 21 and the vertical direction. The supporting component 6 drives the detector 9 to rotate around the rotation axis in the second direction, and the detector 9 can also be adjusted to be aligned with the beam 21.

[0070] In other embodiments, the orientation of the detector 9 before correction is not directly opposite to the beam 21, that is, the bearing surface 61 or the detector 9 is not perpendicular to the beam 21. In order to improve this problem, the bearing component 6 of this embodiment is further configured to rotate relative to the first support seat 8 around the rotation axis of the third direction 76. The third direction 76 is parallel to the length direction of the strip-shaped detector 9. The rotation of the bearing component 6 around the rotation axis of the third direction can drive the detector 9 to change its orientation, so as to adjust the detector 9 to be directly opposite to the beam 21. See Figure 2 .

[0071] See also Figure 1 and Figure 2 The driving mechanism 7 includes a translational motion component 73 and a rotational component 75. The translational motion component 73 is mounted on the first support seat 8 and is configured to move along a first direction relative to the first support seat 8. The rotational component 75 is mounted on the translational motion component 73 and is configured to rotate around a rotation axis in a second direction relative to the translational motion component 73, and the rotational component 75 is connected to the bearing component 6.

[0072] The supporting component 6 is installed on the rotating component 75 so as to rotate along with the rotating component 75 around the rotation axis in the second direction. The rotating component 75 is installed on the translational motion component 73 so as to move along with the translational motion component 73 along the first direction. Therefore, the supporting component 6 can move along with the translational motion component 73 along the first direction and rotate along with the rotating component 75 around the rotation axis in the second direction.

[0073] In some embodiments, the driving mechanism 7 further includes a slide rail 71 mounted on the first support seat 8 and extending along the first direction, and the translational motion component 73 is mounted on the slide rail 71 and is configured to be movable along the slide rail 71 .

[0074] The driving mechanism 7 further includes a first driving component 72 and a second driving component 74. The first driving component 72 is in transmission connection with the translational motion component 73 to drive the translational motion component 73 to move in the first direction; the second driving component 74 is mounted on the translational motion component 73 and in transmission connection with the rotating component 75 to drive the rotating component 75 to rotate around the rotation axis in the second direction.

[0075] In some embodiments, the first support seat 8 includes a bracket 81 and a bracket base 82 disposed at the bottom of the bracket 81 , wherein the driving mechanism 7 is mounted on the bracket 81 .

[0076] The driving mechanism 7 also includes a screw connected to the first driving component 72 and a screw sleeve matched with the screw thread transmission, and the translational motion component 73 is connected to the screw sleeve so as to move linearly along the screw with the screw sleeve during the rotation of the screw. In other embodiments, the driving mechanism 7 includes a first pulley connected to the first driving component 72, a second pulley parallel to and spaced from the first pulley, and a transmission belt sleeved on the first pulley and the second pulley, wherein the translational motion component 73 is connected to the transmission belt so as to move back and forth along a straight line between the first pulley and the second pulley with the transmission belt.

[0077] In some embodiments, the first driving component 72 includes a first motor, and the first motor includes one of a servo motor and a stepper motor.

[0078] In some embodiments, the second driving component 74 includes a second motor, and the second motor includes one of a servo motor and a stepper motor.

[0079] See also Fig.12 The detector calibration device further includes a controller 10, which is signal-connected to the first driving component 72 and the detector 9 respectively.

[0080] Figure 3 and Figure 4 The schematic diagram of the first working condition of the radiographic inspection system of this embodiment is shown. In the first working condition, there is a certain deviation between the detector 9 and the projection of the ray beam 21 on the detector 9 in the width direction of the detector 9. For example, Figure 4 As shown, the projection is not located in the center of the radiation receiving surface of the strip-shaped detector 9 .

[0081] The controller 10 is configured to control the first driving component 72 to drive the supporting component 6 to move along the first direction, and record the intensity of the rays detected during the movement of the detector 9, and then move the supporting component 6 to the position where the intensity of the rays detected by the detector 9 is the largest, so that the ray beam 21 is aligned with the detector 9 in the width direction of the detector 9.

[0082] Figures 5 to 8 Schematic diagram of the radiographic inspection system in the second working condition of this embodiment. In the second working condition, the projection of the detector 9 and the ray beam 21 has a certain deviation in the width direction of the detector 9 and the projection of the detector 9 and the ray beam 21 have a certain angle with the length direction of the detector 9.

[0083] The controller 10 is signal-connected to the first driving component 72, the second driving component 74 and the detector 9, respectively, and is configured as follows:

[0084] Control the first driving component 72 to drive the bearing component 6 to move along the first direction, and record the intensity of the radiation detected by the detector 9 in the middle of the length direction of the detector 9, and then move the bearing component 6 to the position where the intensity of the radiation detected in the middle of the detector is the largest; and

[0085] The second driving component 74 is controlled to drive the supporting component 6 to rotate around the rotation axis in the second direction and record the intensity of the rays detected during the rotation of the detector 9, and then the supporting component 6 is rotated to the angle at which the intensity of the rays detected by the detector 9 is the maximum.

[0086] The rotation axis of the second direction is preferably located in the middle of the length direction of the detector 9. Specifically, for the second working condition, the detector 9 is first controlled to reciprocate along the first direction, and the change in the grayscale value detected by the crystal in the middle of the detector 9 along the first direction is recorded during the movement of the detector 9 along the first direction, and then the detector 9 is adjusted to the position with the maximum grayscale value. Then, the detector 9 is controlled to rotate around the axis of the second direction, and during the rotation, the change in the grayscale value of the crystal at one or both ends of the length direction of the detector 9 is recorded, and finally the detector 9 is rotated to the angle at which the grayscale value detected by the crystal at one or both ends of the detector 9 is the maximum.

[0087] See also Fig. 9 In other embodiments, in order to detect and adjust the orientation of the detector 9 so that the detector 9 is perpendicular to the beam 21, the detector calibration device of this embodiment further includes a visible light lamp 20 and a third driving component 77 ( Fig. 9 not shown).

[0088] The visible light lamp 20 is configured to emit visible light 201 parallel to or overlapping with the ray beam 21 toward the carrying surface 61 or the detector 9. In some embodiments, the visible light lamp 20 and the ray source 2 are arranged on the same side of the collimator 4. Only the part of the light emitted by the visible light lamp 20 that is opposite to the strip slit of the collimator 4 passes through the collimator 4 to form the visible light 201 overlapping with the ray beam 21.

[0089] See also Fig.10 When the visible light 201 is perpendicular to the carrying surface 61 or the detector 9, the width of the light shadow of the visible light 201 on the carrying surface 61 or the detector 9 is the smallest. When the carrying surface 61 or the detector 9 deviates from being perpendicular to the visible light 201, the width of the light shadow of the visible light 201 on the carrying surface 61 or the detector 9 becomes larger. Fig.11 Therefore, it is possible to judge whether the bearing surface 61 or the detector 9 is facing the ray beam 21 by the width of the light shadow of the visible light 201 on the bearing surface 61 or the detector 9 .

[0090] The third driving component 77 is configured to drive the supporting component 6 to rotate around the rotation axis in the third direction 76 to adjust the width of the light shadow irradiated by the visible light 201 on the supporting surface 61 or the detector 9 to a minimum, so that the detector 9 or the supporting surface 61 is perpendicular to the beam 21 .

[0091] See also Fig. 9 and Fig.12 The detector calibration device also includes a camera component 30, which is installed on the supporting component 6 and is configured to capture light and shadow.

[0092] The controller 10 is signal-connected to the camera component 30 and the third driving component 77 respectively, and is configured to determine the width of the light and shadow according to the image taken by the camera component 30 and control the rotation of the third driving component 77 according to the width of the light and shadow to adjust the width of the light and shadow to the minimum.

[0093] Specifically, first, the controller 10 controls the camera component 30 to capture the above-mentioned light and shadow multiple times during the rotation of the supporting component 6 around the third direction 76, and records the width of the light and shadow captured each time; then the supporting component 6 is rotated to the angle where the width of the light and shadow is the smallest, thereby adjusting the orientation of the supporting surface 61 or the detector 9 to face the radiation beam 21.

[0094] In some embodiments, the controller 10 is configured to: first, adjust the supporting surface 61 without the detector 9 installed or the detector 9 installed on the supporting surface 61 to be perpendicular to the beam 21 by controlling the rotation 77 of the third component; then, control the first driving component 72 to drive the supporting component 6 to move along the first direction, so as to move the supporting component 6 to the position where the radiation intensity detected in the middle of the detector 9 is the largest; then, control the second driving component 74 to drive the supporting component 6 to rotate around the rotation axis in the second direction, so as to rotate the supporting component 6 to the angle where the radiation intensity detected by the detector 9 is the largest.

[0095] In some embodiments, the collimator 4 is configured to adjust its position along a first direction relative to the ray source 2 so as to adjust the strip slit of the collimator 4 to be aligned with the center of the ray source 2 , thereby obtaining a ray beam 21 with maximum intensity.

[0096] The X-ray inspection system also includes a fourth driving component 40, which is configured to drive the collimator 4 to adjust its position relative to the X-ray source 2 along the first direction. The fourth driving component 40 and the detector 9 are respectively connected to the controller 10 by signal. The controller 10 is configured to control the fourth driving component 40 to drive the collimator 4 to adjust its position, and record the intensity of the X-ray detected by the detector 9 during the process of adjusting the position of the collimator 4, and then adjust the collimator 4 to the position where the X-ray intensity detected by the detector 9 is the largest.

[0097] The radiation inspection system further comprises a protective cover 3 arranged between the radiation source 2 and the collimator 4 to prevent the detection radiation from radiating to a position deviating from the detection direction and causing harm.

[0098] like Figure 1 As shown, the radiation inspection system further comprises a second support base 1, and the second support base 1 comprises a carrying platform 11 and a base 12 mounted on the carrying platform 11. The radiation source 2 and the collimator 4 are mounted on the base 12.

[0099] Before the X-ray inspection system of the present application works, the relative position of the collimator 4 and the radiation source 2 is first adjusted so that the strip slit of the collimator 4 is adjusted to be aligned with the center of the radiation source 2, thereby obtaining a radiation beam 21 with the highest intensity; then, the detector 9 is aligned with the radiation beam 21 using a detector correction device.

[0100] From the above description, we can see that:

[0101] 1. In this embodiment, the controller 10 adjusts the position of the collimator 4 relative to the ray source 2 according to the ray intensity detected by the detector 9, so as to automatically align the collimator 4 with the center of the ray source 2, thereby obtaining a ray beam 21 with the maximum intensity.

[0102] 2. In this embodiment, the controller 10 adjusts the orientation of the carrying surface 61 or the detector 9 according to the light and shadow of the visible light 201 captured by the camera component 30 so that the detector 9 is perpendicular to the beam 21, thereby achieving automatic adjustment of the carrying surface 61 or the detector 9.

[0103] 3. In this embodiment, the controller 10 controls the supporting component 6 to drive the detector 9 to move along the first direction and / or rotate around the rotation axis in the second direction according to the intensity of the rays detected by the detector 9, thereby realizing automatic alignment of the detector 10 and the ray beam 21.

Claims

1. A detector calibration device, characterized in that: include: A first support seat (8); A bearing component (6) is mounted on the first support seat (8) and has a bearing surface (61), the bearing surface (6) being configured to mount a strip-shaped detector (9), the detector (9) being arranged opposite to the radiation source (2) to receive a radiation beam (21) from the radiation source (2), the projection of the radiation beam (21) on the detector (9) being a straight line, the bearing component (6) being configured to move relative to the first support seat (8) along a first direction parallel to the bearing surface (61) and intersecting with the length direction of the detector (9), and the bearing component (6) being further configured to rotate relative to the first support seat (8) around a rotation axis perpendicular to the bearing surface (61) in a second direction so as to align the strip-shaped detector (9) with the radiation beam (21); as well as A driving mechanism (7) is arranged on the first supporting seat (8), connected to the bearing component (6), and configured to drive the bearing component (6) to move relative to the first supporting seat (8).

2. The detector calibration device according to claim 1, characterized in that: The bearing component (6) is also configured to rotate relative to the first support seat (8) around a rotation axis in a third direction (76), and the third direction (76) is parallel to the strip-shaped detector (9).

3. The detector calibration device according to claim 1 or 2, characterized in that: The driving mechanism (7) comprises: A translational motion component (73) mounted on the first support seat (8) and configured to move along the first direction relative to the first support seat (8); as well as A rotating component (75) is mounted on the translational motion component (73) and is configured to rotate relative to the translational motion component (73) around a rotation axis in the second direction. The rotating component (75) is connected to the bearing component (6).

4. The detector calibration device according to claim 3, characterized in that: The driving mechanism (7) further comprises a slide rail (71) mounted on the first support seat (8) and extending along the first direction, and the translational motion component (73) is mounted on the slide rail (71) and is configured to be movable along the slide rail (71).

5. The detector calibration device according to claim 3, characterized in that: The driving mechanism further comprises: a first driving component (72) drivingly connected to the translational motion component (73) to drive the translational motion component (73) to move along the first direction; and / or A second driving component (74) is mounted on the translation motion component (73) and is transmission-connected to the rotating component (75) to drive the rotating component (75) to rotate around a rotation axis in the second direction.

6. The detector calibration device according to claim 5, characterized in that: The device further comprises a controller (10), wherein the controller (10) is signal-connected to the first driving component (72) and the detector (9) respectively, and is configured to: The first driving component (72) is controlled to drive the supporting component (6) to move along the first direction, and the intensity of the radiation detected by the detector (9) during the movement is recorded, and then the supporting component (6) is moved to a position where the intensity of the radiation detected by the detector (9) is the maximum.

7. The detector calibration device according to claim 5, characterized in that: The device further comprises a controller (10), wherein the controller (10) is signal-connected to the first driving component (72), the second driving component (74) and the detector (9), respectively, and is configured to: Controlling the first driving component (72) to drive the bearing component (6) to move along a first direction, and recording the intensity of the radiation detected by the detector (9) at the middle part along the length direction of the detector (9), and then moving the bearing component (6) to a position where the intensity of the radiation detected at the middle part of the detector (9) is the largest; as well as The second driving component (74) is controlled to drive the supporting component (6) to rotate around the rotation axis in the second direction and record the intensity of the radiation detected by the detector (9) during the rotation process, and then the supporting component (6) is rotated to an angle at which the intensity of the radiation detected by the detector (9) is the maximum.

8. The detector calibration device according to claim 2, characterized in that: Also includes: A visible light lamp (20) configured to emit visible light (201) parallel to or overlapping with the beam of rays toward the carrying surface (61); as well as The third driving component (77) is configured to drive the supporting component (6) to rotate around the rotation axis in the third direction, so as to adjust the width of the light shadow irradiated by the visible light (201) on the supporting surface (61) or the detector (9) to a minimum.

9. The detector calibration device according to claim 8, characterized in that: Also includes: A camera component (30) mounted on the supporting component (6) and configured to capture the light and shadow; as well as The controller (10) is signal-connected to the camera component (30) and the third driving component (77) respectively, and is configured to determine the width of the light and shadow according to the image captured by the camera component (30) and control the rotation of the third driving component (77) according to the width of the light and shadow, so as to adjust the width of the light and shadow to a minimum.

10. A radiographic inspection system, characterized in that: include: The detector calibration device according to any one of claims 1 to 9; The detector (9) is mounted on the bearing surface (61); and The ray source (2) is arranged opposite to the detector (9).

11. The radiographic inspection system according to claim 10, characterized in that: The invention also comprises a collimator (4), which is arranged at the ray emitting end of the ray source (2), and has a strip-shaped slit that allows rays to pass through, so as to constrain the rays emitted by the ray source (2) into the ray beam, and the collimator (4) is configured to adjust its position along the first direction relative to the ray source (2).

12. The radiographic inspection system according to claim 10, characterized in that: The invention also comprises a fourth driving component, wherein the fourth driving component is configured to drive the collimator (4) to adjust its position relative to the radiation source (2); the fourth driving component and the detector (9) are respectively connected to a controller (10) by signals; the controller (10) is configured to control the fourth driving component to drive the collimator (4) to adjust its position, and to record the intensity of the radiation detected by the detector (9) during the process of adjusting the position of the collimator (4), and then to adjust the collimator (4) to a position where the intensity of the radiation detected by the detector (9) is the maximum.

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