Inspection apparatus, inspection method, and inspection system

Abstract

An inspection apparatus and an inspection method and an inspection system thereof are provided. The inspection apparatus includes a transmission imaging device configured to construct a transmission image of an object under inspection; and a diffraction detection device configured to detect a characteristic of at least a portion of the object under inspection. The transmission imaging device defines an inspection passage. The inspection apparatus includes a rectilinear track across the inspection passage in a lateral direction. The diffraction detection device is movable along the rectilinear track to a specific position to detect diffracted radiation of at least a portion of the object under inspection.

Description

Technical Field

[0001] This invention relates to the field of security inspection technology. Specifically, it relates to an inspection device, inspection method, and inspection system. Background Technology

[0002] Current security inspection equipment can quickly inspect items without opening bags or boxes.

[0003] Existing security inspection equipment generally uses X-ray transmission imaging, with more advanced equipment such as CT scans; however, these devices still have the problem of being able to observe the general shape but not be able to completely determine whether the suspected item is contraband.

[0004] More sophisticated equipment is needed to more definitively determine whether an inspected object contains contraband. Summary of the Invention

[0005] One aspect of the present invention provides an inspection device, comprising:

[0006] support;

[0007] A transmission imaging device, supported by the support and configured to construct a transmission image of the object being examined; and

[0008] The diffraction detection device is supported by the bracket.

[0009] In this device, the transmission imaging device defines an inspection channel, and the object being inspected is moved within the inspection channel so that it can be scanned by the transmission imaging device.

[0010] The diffraction detection apparatus includes a diffraction radiation detector configured to move laterally along the inspection channel on the support to a specific position to receive radiation diffracted by at least a portion of the object under inspection in order to detect its characteristics.

[0011] In one embodiment, the inspection device includes a track extending in a straight line, disposed on the bracket and configured to laterally cross the inspection channel along its extension direction.

[0012] The diffraction radiation detector is supported by the track and can move along the track to receive and detect diffracted radiation at a specific location.

[0013] In one embodiment, the diffraction detection device and the transmission imaging device include a common radiation source configured to irradiate the object being inspected; or

[0014] The diffraction detection device and the transmission imaging device each include a radiation source configured to irradiate the object being inspected.

[0015] In one embodiment, the inspected object is determined to contain a suspect and the location of the suspect on the inspected object based on the transmission image, and based on the location of the suspect, the diffraction radiation detector is moved to the specific location to receive radiation diffracted by the suspect in order to determine the characteristics of the suspect portion.

[0016] In one embodiment, the specific location is generally located on the extension of the line connecting the radiation source and the suspect.

[0017] In one embodiment, the track includes a linear guide rail, and the diffraction radiation detector includes a detector translation bracket, the diffraction radiation detector being moved on the linear guide rail via the detector translation bracket.

[0018] In one embodiment, the inspection device further includes an encoder motor and a lead screw, configured to rotate the lead screw by the encoder motor so that the lead screw drives the detector translation bracket to move along the linear guide.

[0019] In one embodiment, the diffraction radiation detector includes a pivot axis mounted on the detector translation support and a detector mount mounted on the pivot axis and supported by the pivot axis, the detector mount being configured to rotate relative to the detector translation support by rotation of the pivot axis, thereby adjusting the pose of the diffraction radiation detector.

[0020] In one embodiment, the diffraction radiation detector includes an adjustment motor mounted on the detector translation bracket, and the pivot shaft includes an adjustment element. The adjustment motor engages with the adjustment element to drive the pivot shaft to rotate by a predetermined angle via the adjustment element.

[0021] In one embodiment, the adjusting motor is configured with a drive gear, and the adjusting element is configured to mesh with the drive gear.

[0022] In one embodiment, the detector mount is rotated via a pivot axis such that the diffraction radiation receiving surface of the diffraction radiation detector faces the radiation source to receive the diffracted radiation.

[0023] In one embodiment, the transmission imaging apparatus includes a transmission radiation detector configured to receive radiation transmitted through an object to be inspected in order to construct a transmission image of the object. The transmission radiation detector includes a plurality of detection units arranged in two rows, with the detection units in each row spaced apart from each other, and the two rows of detection units forming a continuous receiving surface relative to the projection direction of the radiation.

[0024] In one embodiment, adjacent detection units located in two rows overlap with respect to the direction of radiation projection.

[0025] In one embodiment, the transmission radiation detector is arranged in a straight line.

[0026] One aspect of the present invention provides an inspection method using the above-described inspection equipment, comprising:

[0027] The object being inspected is irradiated with the radiation source.

[0028] The transmitted radiation is detected by the transmission radiation detector, and a transmission image of the object under inspection is constructed.

[0029] Identify the portion of the transmission image that corresponds to the suspect object;

[0030] Based on the position of a portion of the suspect image in the transmission image, the location of the suspect within the inspected object is determined; and

[0031] Based on the location of the suspect object within the object being inspected, the diffraction detection device is moved to a specific position to detect the diffraction radiation from the suspect object in order to determine the characteristics of the suspect object.

[0032] In one embodiment, moving the diffraction detection device to a specific location and detecting the diffracted radiation from the suspect object in order to determine the characteristics of the suspect object includes:

[0033] The diffraction radiation detector is moved along the track such that it is substantially located on the extension of the line connecting the radiation source and the suspect.

[0034] According to one aspect of the present invention, an inspection system is provided, comprising:

[0035] A CT scan department, including a CT scanner, is used to examine whether a person being examined contains suspicious items; and

[0036] The re-inspection department, including the inspection equipment described above, is used to identify the composition of the suspected article.

[0037] In one embodiment, after being examined by the CT scan unit, the inspected object that does not contain the suspect is released, while the inspected object that contains the suspect is transferred to the re-examination unit. Attached Figure Description

[0038] The accompanying drawings are provided for a better understanding of this solution and are not intended to limit the scope of the invention, wherein:

[0039] Figure 1 A front view of an inspection device according to an embodiment of the present invention is shown.

[0040] Figure 2 A side view of an inspection device according to an embodiment of the present invention is shown. Detailed Implementation

[0041] To more clearly illustrate the objectives, technical solutions, and advantages of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the following description of the embodiments is intended to explain and illustrate the overall concept of the present invention and should not be construed as limiting the present invention. In the specification and drawings, the same or similar reference numerals refer to the same or similar parts or components. For clarity, the drawings are not necessarily drawn to scale, and some well-known parts and structures may be omitted from the drawings.

[0042] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The word “a” or “an” does not exclude a plurality. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” “right,” “top,” or “bottom,” etc., are used only to indicate relative positional relationships, which may change accordingly when the absolute position of the described object changes. When an element such as a layer, film, region, or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element, or there may be intermediate elements present.

[0043] This invention discloses an inspection device including a transmission imaging device and a diffraction detection device. The transmission imaging device is configured to irradiate radiation toward an object under inspection and construct a transmission image of the object by examining the transmitted radiation. The diffraction detection device is configured to irradiate radiation toward the object under inspection and detect characteristics of at least a portion of the object by examining the radiation diffracted from the object. In this embodiment, the transmission imaging device defines an inspection channel through which the object under inspection can be scanned. The diffraction detection device can move laterally along the extension direction of the inspection channel, for example, to a specific location to detect diffracted radiation. In this invention, the diffraction detection device can be moved to a specific location to complete the measurement of diffracted radiation, thus eliminating the need for a row of diffraction detection detectors arranged (laterally) across the inspection channel, which significantly reduces the cost of the equipment. In this embodiment, the diffraction detection device includes a diffraction radiation detector, and the ability of the diffraction detection device to move to a specific location can mean that the diffraction radiation detector can move to a specific location to receive the diffracted radiation, thereby detecting the diffracted radiation of at least a portion of the object under inspection.

[0044] In one embodiment, the transmission imaging apparatus includes a transmission radiation detector configured to receive radiation transmitted through the object being inspected in order to construct a transmission image of the object being inspected.

[0045] In this embodiment, the transmission imaging device scans the object being inspected located on the inspection channel, constructing a transmission image of the object. By observing the transmission image (which can be done manually or automatically by computer using software), the portion of the object suspected of being a suspect is identified. Since some suspects may have irregular shapes or their composition may make the image unclear, the transmission image alone cannot determine the type of object, requiring further detection. At this point, based on the transmission image scanned by the transmission imaging device, the position of the suspect corresponding to the suspected portion on the object being inspected is located. The diffraction detection device is moved to a specific position, receiving the radiation diffracted by the suspect, thereby detecting the characteristics of the suspect, such as its atomic coefficient, composition, and structure. This allows for confirmation of whether the object being inspected contains contraband without opening the package.

[0046] In this embodiment, the transmission imaging device and the diffraction detection device can be supported by the bracket 1. The transmission imaging device can be fixed on the bracket 1, and the diffraction detection device can move on the bracket 1. For example, the inspection channel extends along a first direction, while the diffraction detection device can move along a second direction, which is the transverse direction of the first direction.

[0047] In embodiments of the present invention, the transmission imaging device and the diffraction detection device may each have a radiation source. For example, the diffraction detection device has a radiation source, and the transmission imaging device has a transmission radiation source. The two radiation sources may be of the same type or may be configured with different types as needed. The radiation source and the transmission radiation detector of the transmission imaging device cooperate to complete the transmission scan, and the radiation source and the diffraction radiation detector of the diffraction detection device cooperate to complete the diffraction detection.

[0048] In another embodiment of the invention, the transmission imaging device and the diffraction detection device may have a common radiation source.

[0049] Figure 1 An inspection apparatus according to an embodiment of the present invention is shown, comprising: a radiation source 2, a transmission radiation detector 10, and a diffraction radiation detector 9. The radiation source 2 can be a commonly used X-ray machine or other special X-ray source. In this embodiment, the radiation source 2 can be a common radiation source 2 shared by the transmission radiation detector 10 and the diffraction radiation detector 9. The transmission radiation detector 10 is configured to receive radiation emitted by the radiation source 2 in order to construct a transmission image of the object being inspected. The radiation source 2 and the transmission radiation detector 10 define an inspection channel 4 for the object being inspected to pass through. The inspection channel 4 can be equipped with a conveyor belt, transport track, trolley, or other similar tool, or it can be a fixed container for placing or accommodating the object being inspected. The object being inspected on the inspection channel 4 can be a bag, luggage, customs clearance product, meat product, etc. The radiation emitted by the radiation source 2 can irradiate the object being inspected on the inspection channel 4, and the radiation leaves after interacting with the object being inspected. The radiation leaving the object being inspected is received and detected by the transmission radiation detector 10. The radiation source 2, the transmission radiation detector 10, and the inspection channel 4 they define can be configured such that the object being inspected is stationary or moving relative to the transmission radiation detector 10. In embodiments where the object being inspected is moving relative to the transmission radiation detector 10, radiation can scan the object being inspected, and the transmission radiation detector 10 can continuously receive the transmission radiation, thereby constructing a transmission image of the scanned portion or all of the object being inspected.

[0050] In one embodiment, radiation source 2 and transmission radiation detector 10 construct a transmission image of the object being inspected by scanning it. The inspection equipment or operator can determine from the acquired transmission image whether the object being inspected contains suspicious items. For example, at a border crossing, the object being inspected (e.g., a person crossing the border) may contain contraband such as drugs. When the object being inspected passes through inspection channel 4, the transmission image can show the location of the suspicious items within the object being inspected (e.g., the person).

[0051] In this embodiment, the diffraction radiation detector 9 is configured to receive diffracted radiation in order to determine the properties of the material that caused the diffraction.

[0052] The diffraction radiation detector 9 can receive radiation diffracted from a material at a specific diffraction angle, thereby enabling the measurement of the material's properties by detecting the received radiation. The term "specific location" as used herein refers to a location where the diffraction radiation detector 9 can detect diffracted radiation, while at other locations, it cannot detect the properties of the desired portion of the diffracted radiation (or the detected diffracted radiation signal from the target suspect portion is too weak to measure the properties of that suspect portion). "Properties" in this document include atomic coefficients or composition of the material. Techniques for detecting the properties of a material based on the radiation diffracted by the material are known and will not be described in detail here. The diffraction radiation detector 9 of this invention can operate using existing diffraction detection principles.

[0053] In one embodiment, the inspection device may further include a track 5 extending laterally across the inspection channel 4 along its extension direction. The track 5 may be a slide rail or a toothed rack, and the diffraction radiation detector 9 may slide on the track 5 (e.g., a slide rail) or move on the track 5 (e.g., a rack) by the engagement of its teeth. The diffraction radiation detector 9 can move along the track 5 in various ways to receive and detect diffracted radiation at specific locations. Figure 1 The track 5 shown is along a straight guide rail, such as a double straight track 5.

[0054] Since the diffraction radiation detector 9 can move across the inspection channel 4 on the straight track 5 to any desired position in the transverse direction of the inspection channel 4, a single diffraction radiation detector 9 can complete the measurement without the need to arrange a row of diffraction radiation detectors 9 across the inspection channel 4 to detect the diffracted radiation, which greatly reduces the cost and complexity of the equipment.

[0055] In one embodiment of the present invention, the specific location can be generally located on the extension line of the connecting line between the radiation source 2 and the suspected object portion. Here, it should be understood that the intersection of the extension line and the track 5 is the location of the diffraction radiation detector 9. In this embodiment, the radiation emitted by the radiation source 2 irradiates the object under inspection. After diffraction by the suspected object portion of the object under inspection, it continues to propagate generally along the direction in which the radiation source 2 irradiates the suspected object portion. The radiation receiving surface of the diffraction radiation detector 9 receives the diffracted radiation. Here, the diffracted radiation is incident along the normal direction of the radiation receiving surface, satisfying the detection requirements of the diffraction inspection device (involving conditions such as diffraction angle well known to those skilled in the art, which are not discussed here). In other words, the diffraction inspection device facing the diffracted radiation means that the diffracted radiation is incident along the normal direction of the radiation receiving surface, thereby obtaining the best detection effect; otherwise, the detection effect will deteriorate. Figure 1In the embodiment shown, the radiation source 2 is fixed, while the diffraction radiation detector 9 is configured to move laterally in the inspection channel 4 to achieve diffraction monitoring of the cross section crossed by the object under inspection in the track 5.

[0056] like Figure 1 As shown, the inspection device includes an encoder motor 7 and a lead screw 71, which together drive the movement and positioning of the diffraction radiation detector 9 on the track 5. The rotation of the lead screw is driven by the encoder motor 7, the direction of rotation of the lead screw determines the direction of movement of the diffraction radiation detector 9, and the number of rotations of the lead screw 71 determines the distance the diffraction radiation detector 9 moves. For example, the coordinates of the suspect in the transverse direction of the inspection channel 4 are represented by the x-coordinate, and the position of the vertical projection of the suspect in the inspection channel 4 in the extension direction of the inspection channel 4 is represented by the y-coordinate. Thus, when the suspect is crossed by the track 5, the number of rotations of the encoder motor 7 can be determined according to the x-position. Therefore, through the controlled rotation of the lead screw 71, the diffraction radiation detector 9 can move to a specific position to inspect the radiation diffracted by the suspect, thereby detecting the characteristics of the suspect.

[0057] Figure 2 A side view of a diffraction radiation detector 9 is shown. The diffraction radiation detector 9 includes a detector translation support 15, through which it moves on a linear guide rail. The diffraction radiation detector 9 includes a pivot shaft 17 mounted on the detector translation support 15, and a detector base 16 mounted on and supported by the pivot shaft 17. The detector base 16 is configured to rotate relative to the detector translation support 15 by rotation of the pivot shaft 17, thereby adjusting the orientation of the diffraction radiation detector 9. The diffraction radiation detector 9 includes an adjustment motor 14 mounted on the detector translation support 15. The pivot shaft 17 includes an adjustment member 12, and the adjustment motor 14 engages with the adjustment member 12 to drive the pivot shaft 17 to rotate by a predetermined angle via the adjustment member 12. The adjustment motor 14 is equipped with a drive gear 13, and the adjustment member 12 is configured to mesh with the drive gear 13. The adjustment member 12... Figure 2 The gear shown is a half gear, but it could be a full gear or a rack.

[0058] exist Figure 2In the diffraction radiation detector, the detector translation support 15 has a sleeve 18 at its bottom, which is connected to a lead screw 71. When the lead screw 71 rotates, the sleeve 18 is driven to move along the lead screw 71, thereby driving the detector translation support 15 to move along the linear track 5. When the diffraction radiation detector 9 moves to a specific position, the drive motor rotates by a certain angle, thereby driving the pivot shaft 17 to rotate by a certain angle through the drive gear 13 and the adjusting element 12 (half gear). The detector seat 16 rotates by a certain angle with the pivot shaft 17, thereby turning the radiation detection surface of the diffraction radiation detector toward the diffracted radiation.

[0059] In an embodiment of the present invention, the transmission radiation detector 10 includes a plurality of detection units 11, which can be arranged in two rows, with the detection units 11 in each row spaced apart from each other. The two rows of detection units 11 form a continuous receiving surface in the transverse direction of the radiation projection direction. With this configuration, the plurality of detection units 11 can construct a two-dimensional transmission image of a cross-section of the object being inspected by detecting the transmission radiation. For example, if a suspect portion is found in the transmission image of the cross-section, the composition or atomic coefficients and other characteristics of the suspect portion can be further determined using a diffraction detection device.

[0060] In embodiments of the invention, adjacent detection units 11 located in two rows overlap with respect to the projection direction of radiation. This configuration allows for continuous detection of images, while also allowing for flexible arrangement of multiple detection units 11, and enabling the maintenance of a single detection unit 11 without replacing the entire row of transmission detectors (in the case where the row of transmission detectors is a single unit). Figure 1 In the illustrated embodiment, multiple detection units are arranged in two rows along a straight line.

[0061] In embodiments of the present invention, the inspection device may include a support 1, for example, Figure 1 As shown, the radiation source 2 can be positioned on top of the bracket 1, for example, it can be fixed to the top of the bracket 1. In such a case... Figure 1 In the illustrated embodiment, the inspection channel 4 is shown as an inspection channel 4 with an enclosing structure; however, the inspection channel 4 may simply represent the space defined by the transmission imaging device. In one embodiment, the inspection channel 4 may be or be equipped with a flat plate, conveyor belt, or other device through which the object to be inspected may be transported, for example, by conveyor belt, or by container. The extending direction of the inspection channel 4 may be, for example, from... Figure 1 The direction from inside the paper to outside the paper. "Across inspection channel 4" refers to crossing inspection channel 4 laterally along the paper surface, for example... Figure 1 The arc-shaped track 5 is arranged across inspection channel 4 as shown.

[0062] In another embodiment, the radiation source 2 may be arranged at the bottom of the support 1, while the transmission radiation detector 10 and the diffraction radiation detector 9 (together with the track 5) are arranged at the top of the support 1, opposite to the radiation source 2 to receive radiation.

[0063] In this embodiment, the transmission imaging device and the diffraction detection device share the same radiation source 2; however, in another embodiment, the transmission imaging device and the diffraction detection device each have their own radiation source. The transmission imaging device and the diffraction detection device are spaced apart along the extension direction of the inspection channel 4. The object under inspection can move along the inspection channel 4 to be scanned by the transmission imaging device, and then move to the diffraction detection device to complete the diffraction detection. The above-described movement of the diffraction radiation detector 9 to a specific position corresponding to the suspect of the object under inspection refers to lateral movement across the inspection channel 4. At this time, for one scan section of the suspect of the object under inspection, when it is necessary to perform diffraction inspection on other sections of the object under inspection, the object under inspection can be moved along the extension direction of the inspection channel 4 (from the paper outwards or towards the paper), and then the diffraction radiation detector 9 can be moved to the specific position corresponding to the suspect on the other section to perform the detection.

[0064] The detector translation bracket 156 may also include a rear collimator 8 for collimating the diffracted radiation, which is then received by the diffracted radiation detector 9. The bracket 1 may also include a front collimator 3 for collimating the radiation radiated from the radiation source 2. The front collimator 3 may have an adjustment function, which can change the angle of the radiation beam emitted from the front collimator 3; details are not described here.

[0065] One aspect of the present invention provides an inspection method, which can be implemented using the inspection equipment described in the above embodiments. The method includes:

[0066] The object being inspected is irradiated with radiation.

[0067] A transmission image of the object being inspected is constructed by detecting the transmitted radiation through the object.

[0068] Identify the portion of the transmission image that corresponds to the suspect object;

[0069] Based on the position of a portion of the suspect image in the transmission image, the location of the suspect within the inspected object is determined; and

[0070] Based on the location of the suspect object within the object being inspected, the diffraction detection device is moved to a specific position to detect the diffraction radiation from the suspect object in order to determine the characteristics of the suspect object.

[0071] In one embodiment, moving the diffraction detection device to a specific location and detecting the diffracted radiation from the suspect object in order to determine the characteristics of the suspect object includes:

[0072] The diffraction radiation detector 9 is moved on the track 5 so that it is substantially located on the extension of the line connecting the radiation source and the suspect.

[0073] One aspect of the present invention provides an inspection system, comprising:

[0074] A CT scan department, including a CT scanner, is used to examine whether a subject contains suspicious objects; and

[0075] The re-inspection unit, including any of the inspection devices described in the preceding embodiments, is used to identify the components of the suspect. After inspection by the CT inspection unit, the inspected object that does not contain the suspect is released, while the inspected object containing the suspect is transferred to the re-inspection unit.

[0076] In one embodiment, the examination channel 4 defined by the re-examination unit can be connected to the examination channel 4 defined by the CT examination unit; in another embodiment, the examination channel 4 defined by the re-examination unit may not be connected to the examination channel 4 defined by the CT examination unit.

[0077] When a person being inspected passes through the CT scan unit, the unit obtains a three-dimensional image of the person, allowing for inspection of whether the person is carrying contraband without opening the package. If the person is free of contraband, they are allowed to proceed. If the three-dimensional image shows potential contraband, meaning a portion of the image is identified as a suspect (but not yet confirmed as contraband), the person is transferred to the re-inspection unit. In the re-inspection unit, the person is scanned by a transmission detection device to determine the location of the suspect. A diffraction detection device then moves to this specific location to detect the suspect and determine its characteristics, such as whether it is explosives, firearms, drugs, or something else. In this embodiment, the transmission detection device allows for a re-inspection of the object being inspected, improving inspection accuracy and simultaneously determining the location of the suspect within the object. Furthermore, the diffraction detection device in this embodiment is movable, eliminating the need to deploy diffraction detection units 11 or detectors across inspection channel 4. This reduces the number of diffraction detectors or sensors, lowering the overall cost of the equipment and system. It also enables re-inspection without opening the package, improving accuracy and efficiency.

[0078] The foregoing has described several embodiments of the present invention. However, it should be understood that these embodiments are merely examples and not all embodiments of the present invention, and are only intended to illustrate the principles of the present invention and not to limit the present invention. The description of the above embodiments may have an emphasis, and different embodiments can be combined based on the above description of the present invention to derive other embodiments of the present invention.

Claims

1. An inspection device, comprising: support; A transmission imaging device includes a transmission radiation detector and is supported by the support and configured to construct a transmission image of an object being inspected, wherein the transmission imaging device defines an inspection channel in which the object being inspected is moved to be scanned by the transmission imaging device. A track, disposed on the bracket and configured to extend laterally in a straight line across the inspection channel along its extension direction; and The diffraction detection device is supported by the bracket; The diffraction detection device includes a radiation source and a diffraction radiation detector, the diffraction radiation detector being configured to move laterally along the inspection channel on the support to a specific position to receive radiation diffracted by at least a portion of the object under inspection in order to detect its characteristics. The specific location is generally located on the extension of the line connecting the radiation source and the suspect. The track includes a linear guide rail, and the diffraction radiation detector includes a detector translation bracket, through which the diffraction radiation detector moves on the linear guide rail; The diffraction radiation detector is configured to move to the specific position and can be adjusted in orientation by rotating relative to the detector translation support, such that the radiation receiving surface of the diffraction radiation detector faces the diffracted radiation so that the diffracted radiation is incident along the normal direction of the radiation receiving surface.

2. The inspection device according to claim 1, wherein The diffraction radiation detector is supported by the track and can move along the track to receive and detect diffracted radiation at a specific location.

3. The inspection device according to claim 2, wherein The diffraction detection device and the transmission imaging device include a common radiation source configured to irradiate the object being inspected; or The diffraction detection device and the transmission imaging device each include a radiation source configured to irradiate the object being inspected.

4. The inspection apparatus of claim 3, wherein the inspected object is determined to contain a suspect and the position of the suspect on the inspected object based on the transmission image, and based on the position of the suspect, the diffraction radiation detector is moved to the specific position to receive radiation diffracted by the suspect in order to determine the characteristics of the suspect portion.

5. The inspection device according to claim 1 further includes an encoder motor and a lead screw, configured such that the encoder motor rotates the lead screw so that the lead screw drives the detector translation bracket to move along the linear guide.

6. The inspection apparatus of claim 5, wherein the diffraction radiation detector includes a pivot shaft mounted on the detector translation bracket and a detector mount mounted on the pivot shaft and supported by the pivot shaft, the detector mount being configured to rotate relative to the detector translation bracket by rotation of the pivot shaft, thereby adjusting the orientation of the diffraction radiation detector.

7. The inspection device according to claim 6, wherein the diffraction radiation detector includes an adjustment motor mounted on the detector translation bracket, the pivot shaft includes an adjustment element, and the adjustment motor engages with the adjustment element to drive the pivot shaft to rotate by a predetermined angle via the adjustment element.

8. The inspection device according to claim 7, wherein the adjusting motor is configured with a drive gear, and the adjusting member is configured to mesh with the drive gear.

9. The inspection apparatus of claim 6, wherein the detector mount is rotated via a pivot axis such that the diffraction radiation receiving surface of the diffraction radiation detector faces the radiation source to receive the diffracted radiation.

10. The inspection apparatus of claim 2, wherein the transmission radiation detector of the transmission imaging device is configured to receive radiation transmitted through the object being inspected in order to construct a transmission image of the object being inspected, the transmission radiation detector comprising a plurality of detection units arranged in two rows, the detection units in each row being spaced apart from each other, and the detection units in the two rows forming a continuous receiving surface relative to the projection direction of the radiation.

11. The inspection device according to claim 10, wherein adjacent detection units located in two rows overlap with respect to the projection direction of radiation.

12. The inspection apparatus of claim 10, wherein the transmission radiation detector is arranged in a straight line.

13. An inspection method using the inspection equipment according to any one of claims 1-12, comprising: The object being inspected is irradiated with the radiation source. The transmitted radiation is detected by the transmission radiation detector, and a transmission image of the object under inspection is constructed. Identify the portion of the transmitted image that corresponds to the suspect object; Based on the position of the suspected object in the transmission image, the location of the suspected object within the object being inspected is determined; as well as Based on the location of the suspect object within the object being inspected, the diffraction detection device is moved to a specific position to detect the diffraction radiation from the suspect object in order to determine the characteristics of the suspect object.

14. The inspection method according to claim 13, wherein moving the diffraction detection device to a specific position and detecting diffraction radiation from the suspect to determine the characteristics of the suspect includes: The diffraction radiation detector is moved laterally along the inspection channel so that it is substantially located on the extension of the line connecting the radiation source and the suspect.

15. An inspection system, comprising: The CT examination department, including a CT scanner, is used to examine whether the subject of the examination contains suspicious items. and The re-inspection unit includes the inspection equipment as described in any one of claims 1-12, for identifying the composition of the suspected article.

16. The inspection system according to claim 15, After being examined by the CT scan department, the inspected object that does not contain the suspect is released, while the inspected object that contains the suspect is transferred to the re-examination department.

Images