CN220356970U - Diffraction detection device, inspection apparatus, and inspection system - Google Patents

Abstract

The utility model provides a diffraction detection device, inspection equipment and inspection system. The diffraction detection device includes a bracket; a diffraction radiation source; and a diffraction radiation detector. The diffraction radiation detector and the radiation source define an inspection channel extending along the first direction, and the diffraction radiation detector is configured to receive the radiation from the inspected object on the inspection channel. Diffracted radiation in order to determine the properties of the substance causing the diffraction. The support is configured to allow movement of the radiation source and the diffracted radiation detector on the support in a second direction across the examination channel, the second direction being transverse to the first direction.

Description

Diffraction detection device, inspection equipment and inspection system

Technical field

The utility model relates to the field of detection technology. Specifically, it relates to a diffraction detection device, inspection equipment and inspection system.

Background technique

The current security inspection equipment can quickly inspect items without opening the bag or box.

Existing security inspection equipment generally uses radiographic transmission imaging, and the more advanced ones include CT inspection equipment; however, this type of equipment still has the problem of being able to observe the general shape but not completely determine whether a suspect object is prohibited.

More complete equipment is needed to determine more definitely whether the object being inspected contains prohibited items.

Utility model content

A diffraction detection device of the present invention includes:

stand;

sources of diffracted radiation; and

A diffractive radiation detector defining an inspection channel extending along a first direction with the diffractive radiation source, the diffractive radiation detector configured to receive diffracted radiation from an inspected object on the inspection channel Radiation in order to determine the properties of substances causing diffraction;

Wherein, the bracket is configured to allow the diffraction radiation source and the diffraction radiation detector to move on the bracket across the inspection channel in a second direction, the second direction being transverse to the first direction.

In one embodiment, the diffractive radiation source and the diffractive radiation detector are movable in a second direction across the examination channel on the support stationary relative to each other; or

The diffraction radiation source and the diffraction radiation detector are respectively movable on the support to a specific position in a second direction across the examination channel.

In one embodiment, the stent includes:

a first track to support the diffractive radiation source and allow movement of the diffractive radiation source along the first track; and

A second track is used to support the diffraction radiation detector and allow the diffraction radiation detector to move along the second track.

In one embodiment, the stent further includes:

A first drive motor and a first lead screw, the first drive motor drives the first lead screw to rotate a certain amount, so that the lead screw can rotate to drive the diffraction radiation source to move a distance along the first track; and /or

A second drive motor and a second screw, the second drive motor drives the second screw to rotate a certain amount, so that the screw can rotate to drive the diffraction radiation detector to move along the second track. Describe the distance.

In one embodiment, the first track includes a first upper rail and a first lower rail, and the first screw is arranged between the first upper rail and the first lower rail;

The second rail includes a second upper rail and a second lower rail, and the second screw is arranged between the second upper rail and the second lower rail.

In one embodiment, the diffraction detection device further includes a transport device configured in the inspection channel to transport the inspected object through the inspection channel.

In one embodiment, the connection between the diffraction radiation source and the diffraction radiation detector passes through the portion of the object being inspected where diffraction detection is to be performed.

In one embodiment, an inspection device is provided, including:

a transmission imaging device configured to irradiate radiation toward the object being inspected and to construct a transmission image of the object being inspected by examining the transmitted radiation; and

the above-mentioned diffraction detection device configured to irradiate radiation toward the object to be inspected and to detect characteristics of at least a portion of the object to be inspected by examining the radiation diffracted from the object to be inspected,

Wherein, the transmission imaging device is configured to scan the object to be inspected on the inspection channel.

In one embodiment, a transmission imaging device includes a transmission radiation source configured to emit radiation; and a transmission radiation detector configured to receive radiation transmitted through an object under examination.

In one embodiment, the position of the suspect is determined based on the transmission image of the inspected object constructed by the transmission imaging device, and the diffraction detection device moves across the inspection channel and the second direction until the suspect of the inspected object is along a vertical direction. Position on the projection on the inspection channel.

In one embodiment, before the diffraction radiation source and the diffraction radiation detector are moved to a position for detecting the suspect object of the object being inspected, the object being inspected is moved in the first direction such that the suspect object is moved along a vertical direction. The direction of said diffracted radiation detector is located on the first orbit and/or the second orbit in projection onto the examination channel.

One aspect of the utility model provides an inspection system, including:

CT inspection department, including CT machine, used to check whether the object being inspected contains suspects; and

The re-inspection section includes the above-mentioned inspection equipment and is used to determine the characteristics of the suspect object.

Description of the drawings

The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present utility model, in which:

Figure 1 shows a schematic diagram of a diffraction detection device according to an embodiment of the present invention. The left picture is a front schematic diagram, and the right picture is a side schematic diagram.

Detailed ways

In order to more clearly explain the purpose, 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 general concept of the present invention, but should not be understood as limiting the present invention. In the specification and drawings, the same or similar reference numbers refer to the same or similar parts or components. For the sake of clarity, the drawings are not necessarily to scale and some well-known components and structures may be omitted from the drawings.

Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by those with ordinary skills in the field to which the present invention belongs. "First", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The wording "a" or "an" does not exclude a plurality. Words such as "include" or "comprising" mean that the elements or things appearing before the word include the elements or things listed after the word and their equivalents, without excluding other elements or things. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Top", "bottom", "left", "right", "top" or "bottom" are only used to express relative position relationships. When the absolute position of the described object changes, the relative position relationship may also correspond. ground changes. When an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element, or Intermediate elements may be present.

Figure 1 shows a diffraction detection device according to an embodiment of the present invention. The diffraction detection device includes: a bracket 11, a diffraction radiation source 1 and a diffraction radiation detector 7. The diffraction radiation source 1 and the diffraction radiation detector 7 are supported by a bracket 11 . A diffractive radiation detector 7 defines an inspection channel 5 extending along a first direction with said diffractive radiation source 1 , and the diffractive radiation detector 7 is configured to receive diffracted radiation from the inspected object 6 on the inspection channel 5 in order to determine whether the radiation Diffraction properties of matter. Here, the substances that diffract radiation can be suspected objects such as prohibited items, such as suspect objects in luggage. Since the suspect objects cannot be seen with the naked eye, and the bags are inconvenient to open, a diffraction detection device is needed to identify whether the suspect objects are Prohibited items. Inspection channel 5 can be a space in which the inspected object can receive inspection. The inspection channel 5 may be provided with a conveyor belt, a conveyor box or other containers or devices for conveying.

In this embodiment of the invention, the bracket 11 is configured to allow the diffraction radiation source 1 and the diffraction radiation detector 7 to move in a second direction across the inspection channel 5 on the bracket 11 , a second The direction is transverse to the first direction.

In one embodiment of the invention, the support 2 is configured to allow the diffraction radiation source 1 and the diffraction radiation detector 7 to be stationary relative to each other on the support 2 across the inspection channel 5 along a second direction movement. Here "stationary relative to each other" means that the movements of the diffraction radiation source 1 and the diffraction radiation detector 7 are synchronized.

In another embodiment of the present invention, the bracket 2 is configured to allow the diffraction radiation source 1 and the diffraction radiation detector 7 to each be able to move in the second direction across the inspection channel 5 on the bracket 2, What this means here is that the diffraction radiation source 1 and the diffraction radiation detector 7 do not need to move at the same time, or do not need to move at the same speed, or do not need to start from the same starting point, or do not need to move with a fixed positional relationship relative to each other, they only need to Just move them to specific positions to allow diffraction detection to be completed. According to the embodiment of the present invention, the specific position here means that the connection line between the diffraction radiation source 1 and the diffraction radiation detector 7 generally passes through the part of the inspected object 6 that needs to perform diffraction detection, and the diffraction detection can be completed. It needs to be explained. It is not necessary that the connection between the diffraction radiation source 1 and the diffraction radiation detector 7 strictly passes through the part of the inspected object 6 where diffraction detection needs to be performed. In one embodiment of the present invention, the diffraction radiation source 1 and the diffraction radiation detector 7 are configured to be aligned in the vertical direction, and the crystal in the diffraction radiation detector is configured in this arrangement. At this time, the specific position indicates that the diffraction radiation The detector 7 is located at a position along the vertical direction of the projection of the inspection channel of the portion of the inspected object 6 that needs to perform diffraction detection. It should be understood that in other embodiments of the present invention, the diffraction radiation source 1 and the diffraction radiation detector 7 may not be aligned in the vertical direction to achieve diffraction detection. Therefore, in the present invention, a specific position also means that when the diffraction radiation source 1 and the diffraction radiation detector 7 are located at a specific position, the diffraction radiation after the diffraction radiation source 1 irradiates the part of the inspected object 6 that needs to perform diffraction detection will be diffracted. Radiation detector receives.

exist

In one embodiment, the support 11 includes a first track 2 to support the diffraction radiation source 1 and allow the diffraction radiation source 1 to move along the first track 2; and a second track to support the diffraction radiation source 1. diffracted radiation detector 7 and allowing said diffracted radiation detector 7 to move along said second track.

The first rail 2 and the second rail 10 span the inspection channel 5 along the second direction. In the embodiment shown in FIG. 1 , the first rail 2 is disposed on the upper part of the bracket 11 and the second rail 10 is disposed on the lower part of the bracket 11 . The first track 2 may be a dual-track structure, that is, it includes a first upper track and a first lower track, and the diffraction radiation source 1 is supported on the first upper track and the first lower track. Such a configuration can support the diffraction radiation more stably. source; however, the first track 2 can be a single track setup. The second track 10 may be a dual-track structure, that is, it includes a second upper track and a second lower track, and the diffraction radiation detector 7 is supported on the second upper track and the second lower track. Such a configuration can support diffraction radiation more stably. Detector 7; however, the second track 10 may be a single track arrangement.

The diffraction detection device may also include a first drive motor 4 and a first lead screw 3. The first drive motor 4 drives the first lead screw 3 to rotate a certain amount, so that the lead screw can rotate to drive the diffraction radiation source 1 along the first lead screw 3. One track 2 moves one distance.

The diffraction detection device may also include a second drive motor 9 and a second lead screw 7 . The second drive motor 9 drives the second lead screw 7 to rotate a certain amount, so that the lead screw can rotate to drive the diffraction radiation detector 7 along the second track 10 Move the distance stated.

The diffractive radiation source 1 may comprise a diffractive radiation source 1 holder 11 for supporting the diffractive radiation source 1 . The upper end of the diffraction radiation source 1 bracket 11 is supported on the first upper rail, and the lower end is supported on the first lower rail. The diffraction radiation source 1 bracket 11 also includes a first sleeve. The first sleeve can be located on the diffraction radiation source 1 bracket 11 The lower part is sleeved with the first screw 3 (as shown in Figure 1, the first screw 3 is shown to be located between the first upper rail and the first lower rail, but this is not necessary), the first set The cylinder moves from left to right or from right to left according to the rotation direction of the first screw 3; the first drive motor 4 rotates the first screw 3 for a specific number of turns based on the position of the suspect, and the rotation of the first screw 3 The number determines the moving distance of the first sleeve, and the movement of the first sleeve is also the movement of the diffraction radiation source 1 bracket 11. Here, the number of rotations of the first drive motor 4 has a linear corresponding relationship with the position of the suspect object in the transverse direction of the inspection channel 5 .

The diffraction radiation source 1 may comprise a diffraction detector holder 11 for supporting the diffraction detector. The upper end of the diffraction detector bracket 11 is supported on the second upper rail, and the lower end is supported on the second lower rail. Similarly, the diffraction detector bracket 11 may include a second sleeve, and the second sleeve is sleeved with the second lead screw 7 (As shown in Figure 1, the second screw 7 is shown to be located between the second upper rail and the second lower rail, but this is not necessary), when the second screw 7 rotates, the second sleeve Move from left to right or from right to left according to the rotation direction of the second screw 7; the second drive motor 9 rotates the second screw 7 a specific number of turns based on the position of the suspect, and the number of rotations of the second screw 7 The movement distance of the second sleeve is determined, and the movement of the second sleeve is also the movement of the diffraction detector bracket 11 . Similarly, the number of rotations of the second drive motor 9 has a linear corresponding relationship with the position of the suspect in the lateral direction of the inspection channel 5

In the embodiment of the present invention, the first track 2 and the second track 10 may be slide rails, racks with teeth, or lead screws. The diffraction radiation source 1 bracket 11 and the diffraction detector bracket 11 can be driven by a screw through a sleeve, or can be equipped with gears that mesh with the teeth on the first rail 2 and the second rail 10 respectively, and are driven by the first drive motor 4 and the second rail 10. The two drive motors 9 drive the gears to rotate so that the diffraction radiation source 1 bracket 11 and the diffraction detector bracket 11 can move on the first track 2 and the second track 10 respectively. Other embodiments of the present invention also include other devices to drive the diffraction radiation source 1 and the diffraction detector to move across the inspection channel 5 , as long as both the diffraction radiation source 1 and the diffraction detector can be moved.

In the embodiment shown in FIG. 1 , the inspection channel 5 is shown as a rectangular space with a cross-section passing through the diffraction detection device along the first direction, which is intended to indicate that the inspected object 6 can be located in this space, and can Free to move in the first direction, however, does not imply the presence of such a rectangular component. In addition, in the inspection channel 5 shown in FIG. 1 , a conveyor belt 12 , a conveyor frame (not shown) and other devices for conveying the inspected object 6 may be provided.

The utility model discloses an inspection equipment, which includes a transmission imaging device and the above-mentioned diffraction detection device. The transmission imaging device and the diffraction detection device can be supported by the bracket 11 . In the diffraction detection device as shown in FIG. 1 , the transmission imaging device can be disposed close to the diffraction detection device in the first direction, or can be separated by a predetermined distance. The transmission imaging device is configured to irradiate radiation toward the object 6 to be inspected and to construct a transmission image of the object 6 to be inspected by examining the transmitted radiation. The diffraction detection device is configured to irradiate radiation toward the inspection object 6 and detect characteristics of at least a portion of the inspection object 6 (eg, a suspect) by examining the radiation diffracted from the inspection object 6 . In this embodiment, the diffraction radiation detector 7 and the diffraction radiation source 1 define an inspection channel 5 extending along the first direction; however, it can also be considered that the inspection channel 5 is defined by a transmission imaging device; in other words, transmission The imaging device and the diffraction detection device may together define an inspection channel 5 .

The inspected object 6 can be moved on the inspection channel 5 so that the inspected object 6 can be scanned by the transmission imaging device. In this embodiment, the transmission imaging device may be fixed on the bracket 11 . In one embodiment, the transmission imaging device includes a transmission radiation source and a transmission radiation detector, configured such that the transmission radiation source irradiates radiation toward the object to be inspected 6 , and the transmission radiation detector receives the radiation transmitted through the object to be inspected 6 so as to be able to construct the object to be inspected Transmission image of object 6. The transmission radiation source and the transmission radiation detector can be fixed on the bracket 11 , for example, the transmission radiation source is fixed on the top of the bracket 11 , and the transmission radiation detector is fixed on the bottom of the bracket 11 ; in another embodiment, the configuration is reversed, and the transmission radiation detector is fixed on the bracket 11 . The radiation source is fixed on the bottom of the bracket 11 and the transmitted radiation detector is fixed on the top of the bracket 11 . In one embodiment, the transmission imaging device can share the diffraction radiation source of the diffraction detection device, which can reduce radiation sources, reduce equipment costs, and simplify the structure. The diffraction radiation source can move freely on the bracket 11 and can be used as the radiation source of the transmission imaging device. At this time, the transmission radiation detector can be fixed and the diffraction radiation source can move. The transmission imaging device can be irradiated with the same radiation beam as the diffraction detection device. The imaging operation is completed within the section (of the inspected object 6 ). This is advantageous. When the transmission imaging device scans out the suspect object, the diffraction detection can be performed in situ, that is, the transportation of the object 6 to be inspected is stopped, and the diffraction detection device is moved to the vicinity of the suspect object to perform the diffraction detection.

In embodiments of the present invention, the diffraction detection device can move, for example, move laterally along the inspection channel 5 to a specific position to detect diffracted radiation. In the present utility model, the diffraction detection device can be moved to a specific position to complete the measurement of diffraction radiation, so there is no need to arrange a row of diffraction detection detectors across the inspection channel 5 (in the transverse direction), which greatly reduces the cost of the equipment. The specific position refers to the part where the connection between the diffraction radiation source and the diffraction radiation monitor passes through the part where diffraction detection is required.

In one embodiment of the present invention, the position in the first direction is represented by the coordinates of the X-axis, and the position in the second direction is represented by the coordinates of the Y-axis. After the position of the lower left corner of the inspection channel 5 in the side view is the origin), the position of the two-dimensional plane determined in the first direction and the second direction in the inspection channel 5 shown in Figure 1 can be expressed by two-dimensional coordinates. The transmission imaging device scans the inspection object 6 moving on the inspection channel 5 and constructs a transmission image of the inspection object 6 . By observing the scanned transmission image (this can be manual observation, or you can use software and computer to automatically detect), find the suspect part in the transmission image, and determine the x, y coordinates of the suspect part. Since some suspects may have irregular shapes, or the composition of the suspects causes the image to be unclear, it is not possible to determine what kind of object the suspect part is simply from the transmission image, and further testing is required. At this time, according to the x, y coordinates of the suspect, the inspected object 6 is moved so that the coordinates of the suspect become (0, y) (located on the first track 2 and the second track 10 along the vertical direction on the inspection channel 5 (on the projection), then move the diffraction detection device with the x coordinate value 0 to the (0, y) position, use the diffraction radiation source 1 to illuminate the suspect part, and the diffraction detector receives the radiation diffracted by the suspect, thereby detecting the Characteristics, such as the atomic coefficient of the suspect, the composition and composition of the suspect, etc., thereby enabling the inspection object 6 to be reconfirmed whether it contains prohibited items without opening the package.

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 diffraction radiation source 1, and the transmission imaging device has a transmission radiation source. The two radiation sources may have the same model, Different models can also be configured as needed. The radiation source of the transmission imaging device and the transmission radiation detector cooperate to complete the transmission scanning, and the radiation source of the diffraction detection device and the diffraction radiation detector 7 cooperate to complete the diffraction detection.

In another embodiment of the present invention, the transmission imaging device and the diffraction detection device may have a common radiation source. In this embodiment, the diffraction radiation source 1 shown in Figure 1 irradiates a radiation beam toward the object to be inspected 6, and the transmitted radiation detector detects the transmitted radiation, thereby realizing scanning of the moving object to be inspected 6; When a suspect is found, the inspected object 6 is stopped. At this time, the x value of the suspect is 0, so there is no need to move the inspected object 6, and the diffraction detector is directly moved to complete the diffraction detection. In this embodiment, the transmitted radiation detector may be located together with the diffracted radiation detector 7 within the projection range of the radiation source. Figure 1 does not show the configuration of this embodiment.

"Characteristics" as used herein include the atomic coefficients, structural composition or other properties of a substance, which correspond to the intrinsic characteristics of the substance. The technology of detecting the characteristics of a substance based on the radiation diffracted by the substance is known and will not be described too much here. The diffraction radiation detector 7 of the present invention can work using the existing diffraction detection principle.

In embodiments of the present invention, a specific position may allow the diffractive radiation source 1 to illuminate the suspect, and the diffractive radiation detector 7 can detect the diffracted radiation to determine the characteristics of the suspect. The radiation emitted by the diffractive radiation source 1 irradiates the suspect. After being diffracted by the suspect, it generally continues to propagate in the direction of the portion of the suspect that is irradiated. The radiation receiving surface of the diffractive radiation detector 7 receives the diffracted radiation. Here, the diffracted radiation is incident along the normal direction of the radiation receiving surface, meeting the detection requirements of the diffraction inspection device (diffraction angle and other conditions that are well known to those skilled in the art are not discussed here). In the embodiment shown in FIG. 1 , the diffractive radiation source 1 and the diffractive radiation detector 7 may be arranged generally in a vertical direction and configured to move laterally across the inspection channel 5 . In one embodiment of the present invention, when the diffraction radiation source 1 and the diffraction radiation detector 7 are aligned in the vertical direction, the radiation receiving surface of the crystal in the diffraction radiation detector 7 has been adjusted in advance, so as long as the diffraction radiation source 1 and When the diffraction radiation detector 7 is arranged in the vertical direction, the diffraction radiation detector 7 can achieve detection without any adjustment. Persons skilled in the art understand that the crystal in the diffraction radiation detector 7 needs to meet a certain diffraction angle to complete the detection. However, the embodiments of the present utility model have adjusted the diffraction angle in advance and even completed specific corrections. Therefore, during the diffraction detection process There is no need to adjust the orientation of the diffraction radiation detector 7 and no calibration operation, which greatly improves the convenience of the detection equipment.

In addition, since both the diffraction radiation source 1 and the diffraction radiation detector 7 make linear translational movements during the diffraction detection process, the distance between the diffraction radiation source 1 and the diffraction radiation detector 7 remains unchanged, and the intensity of the diffracted radiation It is roughly equivalent, which is helpful to improve the accuracy of judging the characteristics of suspects during the detection process.

In embodiments of the present invention, the transmitted radiation detector is not shown, however, it should be understood that the transmitted radiation detector may have a desired arrangement and shape, such as having an "L" shape, or may be composed of multiple small transmitted radiation detectors. The detection unit is constructed together, with the transmitted radiation detector being arranged on the support 11 on the opposite side of the transmitted radiation source, which does not conflict with the diffracted radiation detector 7 .

In an embodiment of the invention, the transmitted radiation source is intended to include a collimator, so that the transmitted radiation source can emit a radiation beam, such as a sector beam. Transmitted radiation detectors are intended to contain post-collimators to exclude interference from stray radiation.

One aspect of the present invention provides an inspection method, which can be implemented using the inspection equipment in the above embodiment. Methods include:

Use radiation to irradiate the object being examined 6;

constructing a transmission image of the object 6 being examined by detecting the transmitted radiation transmitted through the object 6 being examined;

Identify the portion of the suspect image in the transmission image that corresponds to the suspect;

determining the position of the suspect portion in the inspected object 6 based on the position of the suspect image portion in the transmission image; and

The diffraction detection device is moved to a specific position to detect the diffracted radiation from the suspect object in order to determine the characteristics of the suspect part.

One aspect of the utility model provides an inspection system, including:

The CT inspection unit, including a CT machine, is used to check whether the inspected object 6 contains a suspect; and

The re-inspection part includes the inspection equipment described in any of the previous embodiments, and is used to determine the characteristics of the suspect, such as atomic coefficients, composition, etc.

In one embodiment, the inspection channel 5 defined by the re-examination part may be connected to the inspection channel 5 defined by the CT inspection part; in another embodiment, the inspection channel 5 defined by the re-examination part may not be connected to the inspection channel 5 defined by the CT inspection part. .

In one embodiment, after being inspected by the CT inspection unit, the inspected objects 6 that do not contain suspects are released, and the inspected objects 6 that contain suspects are sent to the re-inspection unit.

In one embodiment, the inspection equipment moves in a first direction through the transmission imaging device to scan the inspected object 6 containing the suspect, and based on the position of the suspect determined by the transmission image, the diffraction detection device is used to further detect the suspect. characteristics of things.

When the inspected object 6 passes through the CT inspection unit, the CT inspection unit can obtain a three-dimensional image of the inspected object 6 , thereby inspecting whether the inspected object 6 contains prohibited items without opening the package. When the inspected object 6 does not contain prohibited items, the inspected object 6 is released; when the three-dimensional image of the inspected object 6 shows that it may contain prohibited items, that is, a part of the image is determined to be a suspect object (it cannot be confirmed that it is a prohibited item). , the inspected object 6 will be sent to the re-inspection department. In the re-inspection part, the inspected object 6 is scanned by the transmission detection device to determine the position of the suspect object on the inspected object 6, and then the diffraction detection device can move to the above-mentioned specific position to detect the suspect object and determine the characteristics of the suspect object, for example Be it explosives, guns, drugs or whatever. In this embodiment, since the transmission detection device is provided, the object 6 to be inspected can be re-detected, thereby improving the accuracy of the inspection, and at the same time, the position of the suspect in the object 6 to be inspected can be determined; further, the diffraction in this embodiment The detection device can be moved, so there is no need to arrange diffraction detection units or detectors across the inspection channel 5, thereby reducing the number of diffraction detectors or sensors, reducing the cost of the entire equipment and system, and at the same time enabling re-inspection without opening the package, improving accuracy. and efficiency.

Multiple embodiments of the present utility model have been described above. However, it should be understood that these embodiments are only examples, not all embodiments of the present utility model, and are only used to illustrate the principles of the present utility model and not to limit the present utility model; The description of the above embodiments may have emphasis, but different embodiments can be combined according to the above description of the present utility model to obtain other embodiments of the present utility model.

Claims (14)

1. A diffraction detection device comprising:

a bracket;

characterized by further comprising:

a source of diffracted radiation; and

a diffracted radiation detector defining an inspection channel extending in a first direction with the diffracted radiation source, the diffracted radiation detector configured to receive diffracted radiation from an inspected object on the inspection channel to determine a property of a substance causing diffraction;

wherein the support is configured to allow the diffracted radiation source and the diffracted radiation detector to be movable on the support in a second direction across the examination path, the second direction being transverse to the first direction.

2. The diffraction detection device of claim 1, wherein

The diffracted radiation source and the diffracted radiation detector are stationary relative to each other on the support movable in a second direction across the examination path; or (b)

The diffracted radiation source and the diffracted radiation detector are each movable on the support in a second direction across the examination path to a specific position.

3. The diffraction detection device of claim 1, wherein the holder comprises:

a first track for supporting the diffracted radiation source and allowing the diffracted radiation source to move along the first track; and

a second track for supporting the diffracted radiation detector and allowing the diffracted radiation detector to move along the second track.

4. A diffraction detection device according to claim 3, wherein said holder further comprises:

a first drive motor and a first lead screw, the first drive motor driving the first lead screw to rotate by an amount such that the lead screw is rotatable to drive the diffracted radiation source to move a distance along the first track; and/or

The second drive motor drives the second lead screw to rotate by the certain amount, so that the lead screw can rotate to drive the diffracted radiation detector to move the distance along the second track.

5. The diffraction detection device of claim 4, wherein the first track comprises a first upper track and a first lower track, the first lead screw being disposed between the first upper track and the first lower track; and is also provided with

The second rail includes a second upper rail and a second lower rail, and the second lead screw is disposed between the second upper rail and the second lower rail.

6. The diffraction detection device of claim 1, further comprising a transport device disposed within the inspection tunnel for transporting the inspected object through the inspection tunnel.

7. The diffraction detection device of claim 1, wherein the line connecting the diffraction radiation source and the diffraction radiation detector passes substantially through the portion of the inspected object where diffraction detection is to be performed.

8. An inspection apparatus comprising:

a transmission imaging device configured to irradiate radiation toward an object to be inspected and construct a transmission image of the object to be inspected by inspecting the transmission radiation; and is also provided with

Characterized in that the examination apparatus further comprises a diffraction detection device as claimed in any of the claims 1-7, configured to irradiate radiation towards the object under examination and to detect a characteristic of at least a part of the object under examination by examining the radiation diffracted from the object under examination,

wherein the transmission imaging device is configured to scan an object under examination on the examination path.

9. An inspection apparatus according to claim 8, wherein

The transmission imaging device includes: a transmission radiation source configured to emit radiation; and a transmitted radiation detector configured to receive radiation transmitted through the object under examination.

10. An inspection apparatus according to claim 9, wherein the position of the suspected substance is determined based on a transmission image of the inspected object constructed by the transmission imaging means, and the diffraction detection means is moved across the inspection channel in the second direction to a position on the projection of the suspected substance of the inspected object on the inspection channel in the vertical direction.

11. An inspection apparatus according to claim 10, characterized in that before the diffracted radiation source and the diffracted radiation detector are moved to a position for detecting a suspected object of an object under inspection, the object under inspection is moved in a first direction so that the projection of the suspected object in a vertical direction onto the inspection channel is located on the diffracted radiation detector on the first track and/or the second track.

12. An inspection system, comprising:

a CT inspection unit including a CT machine for inspecting whether or not an object to be inspected includes a suspected substance; and is also provided with

Further comprising a review portion comprising an inspection apparatus as claimed in any one of claims 8 to 11 for determining a characteristic of the suspected substance.

13. The inspection system according to claim 12, wherein after the inspection by the CT inspection unit, an object to be inspected that does not include a suspected object is passed, and the object to be inspected that includes a suspected object is transferred to the review unit.

14. The inspection system of claim 13, wherein the inspection apparatus is moved in a first direction to scan an inspected object containing a suspected object through the transmission imaging means and the characteristic of the suspected object is further detected using the diffraction detection means based on the suspected object position determined by the transmission image.