Security check system and sorting method

Abstract

The invention relates to the technical field of security check, and discloses a security check system and a sorting method. The security check system comprises a security check mechanism, and the security check mechanism is provided with a conveyor belt and a detection device. The conveying belt is provided with at least one placing area used for bearing articles to be checked in the conveying direction of the conveying belt, the placing area and the conveying belt move in the same direction, and the area identification structure is used for identifying the placing area; the security inspection mechanism further comprises a sensing device capable of determining the position of at least one placement area according to the area identification structure. According to the technical scheme, associated binding of the articles and the areas is achieved through the placement areas and the area identification structures on the conveying belt, accurate positioning of the sensing device is combined, suspicious articles can be accurately and efficiently sorted under the condition that no additional speed regulation equipment or luggage trays are needed, the system structure is simplified, and the security check efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of security inspection technology, specifically to a security inspection system and sorting method. Background Technology

[0002] In high-traffic security screening scenarios, security screening systems are core systems for ensuring public safety, used to identify and sort luggage containing suspicious items, thereby improving post-screening efficiency. In existing security screening and sorting technologies, to achieve accurate sorting of suspicious luggage, each piece of luggage needs to be separated from each other in advance to avoid mishandling adjacent luggage during sorting. Common separation methods include using speed control mechanisms to adjust the speed difference of the conveyor belt to separate luggage, and using luggage trays for separation.

[0003] However, both of the above methods have obvious technical drawbacks: In the first speed-adjustment separation method, the deceleration step will significantly slow down the overall security check process, especially in scenarios with large passenger flows such as subways and high-speed rail stations, which can easily cause congestion at security checkpoints and seriously reduce security check efficiency; The second luggage tray separation method requires a large number of additional trays, which increases the investment cost of security check equipment. In addition, the transportation, recycling and storage of trays require additional space. At the same time, the presence of trays increases the operational complexity of the security check process, resulting in limited overall efficiency.

[0004] To address the aforementioned issues, it is imperative to design a security inspection system and sorting method that can achieve precise zoning and control of items awaiting security inspection, ensure the sorting efficiency of security inspection equipment in high-traffic scenarios, and effectively reduce equipment investment and manual maintenance costs. Summary of the Invention

[0005] In view of the above, the present invention adopts the following technical solution: On one hand, the present invention provides a security inspection system, which includes a security inspection mechanism. The security inspection mechanism includes a conveyor belt for transporting items to be inspected and a detection device for inspecting the items to be inspected. The conveyor belt transports items in a first direction. The conveyor belt includes at least one placement area arranged along a first direction, the placement area being used to carry items to be inspected and moving in the same direction as the conveyor belt, and the conveyor belt also includes a region marking structure for identifying the placement area; The security inspection mechanism also includes a sensing device that can determine the location of at least one of the placement areas based on the area identification structure.

[0006] The aforementioned security inspection system sets up at least one placement area along the first direction of the conveyor belt for carrying items to be inspected, and sets up a corresponding area identification structure to identify the placement area. The two work together to associate and bind the items to be inspected with their respective placement areas, achieving precise zoning of items to be inspected without the need for additional speed adjustment equipment, trays, or other auxiliary structures. At the same time, the system uses sensors to accurately locate the placement area, enabling precise sorting of items within the area after they reach the end of the security inspection mechanism.

[0007] Optionally, the area marking structure includes a plurality of protrusions disposed on the surface of the conveyor belt and extending along the width direction of the conveyor belt. The plurality of protrusions are spaced apart along a first direction, and the placement area is the area between two adjacent protrusions. By forming physical separation through the protrusions extending along the width direction on the conveyor belt, the structural features of the protrusions can be used to achieve clear marking of the placement area, thereby improving the reliability of partitioning and marking.

[0008] Optionally, at least one of the protrusions is integrally formed with the conveyor belt; and / or, at least one of the protrusions is elastically connected to the conveyor belt. Integrating the protrusion with the conveyor belt can reduce manufacturing costs and improve the stability of the overall structure; elastically connecting the protrusion with the conveyor belt can buffer the collision and impact of other components of the security inspection system on the protrusion during the movement of luggage or the conveyor belt; the two connection methods can be flexibly selected or combined to adapt to different security inspection scenarios.

[0009] Optionally, the protrusion includes a lead strip, or the protrusion is a lead strip; the sensing device includes an X-ray device. By setting the sensing device as an X-ray sensing device, it can be directly installed in the detection device, eliminating the need for additional sensing equipment in other locations, thus significantly simplifying the overall structure of the security inspection agency.

[0010] Optionally, the sensing device includes a photoelectric switch, which is disposed at the bottom of the conveyor belt. The photoelectric sensing method enables simple and accurate positioning of the placement area, with simple logic and easy implementation; at the same time, the bottom-mounted design effectively avoids interference from obstruction by the items to be inspected, ensuring the accuracy of the detection.

[0011] Optionally, the area marking structure includes multiple marking units disposed on the surface of the conveyor belt, with the multiple marking units spaced apart along a first direction, and the placement area being the area between two marking units. Using the area between two optional marking units as the placement area, instead of a fixed protrusion, makes the division of the placement area more flexible, and the marking units do not obstruct or interfere with the placement and transport of luggage, thus improving the efficiency of the conveyor belt.

[0012] Optionally, when placing items to be inspected on the conveyor belt, the maximum length of the items in the first direction corresponds to a first identification unit and a second identification unit, and the placement area is the area between the first identification unit and the second identification unit. By matching the corresponding first and second identification units according to the maximum length of the items in the first direction, and using the area between them as the placement area, the division of the placement area more closely matches the actual size of the items, resulting in higher security inspection efficiency.

[0013] Optionally, the area identification structure includes at least one of the following: scale lines, numbered identifiers, hollowed-out identifiers, lead-based identifiers, barcodes, or QR codes. The aforementioned area identification structure can be selected according to the needs of detection and positioning, and is compatible with corresponding identification methods and sensing devices, offering strong applicability and diverse implementation methods.

[0014] Optionally, the security inspection system further includes a sorting mechanism located downstream of the security inspection mechanism. This sorting mechanism is used to sort items awaiting security inspection within the placement area based on information generated by the detection device and the sensing device. By placing a sorting mechanism downstream of the security inspection mechanism, baggage bound to the placement area can be accurately sorted based on the positioning information from the sensing device and the detection results from the detection device, enabling rapid processing of suspicious baggage.

[0015] On the other hand, the present invention also provides a sorting method for a security inspection system, the security inspection system including a security inspection mechanism and a sorting mechanism, the security inspection mechanism including a conveyor belt for conveying items to be inspected and a detection device for detecting the items to be inspected, the method including: A first placement area is provided on the conveyor belt and moves in the same direction as the conveyor belt. The first placement area contains first area identification information. Place the items to be inspected in the first designated area; The detection device detects the item to be inspected and generates first detection information. Associate the first detection information with the first region identification information; Determine whether the first detection information contains target features; If the target feature is included, after determining that the first placement area has reached the end of the conveyor belt, the sorting mechanism is controlled to perform a sorting operation. If the target feature is not included, the sorting operation will not be performed.

[0016] Compared with existing technologies, the above sorting method sets up a first placement area containing area identification information on the conveyor belt, associates and binds the detection information of the items to be inspected with the placement area, distinguishes normal baggage from suspicious baggage based on the detection information of the items to be inspected, and automatically controls the sorting action after confirming that the placement area where the suspicious baggage is located has reached the end of the conveyor belt. This can accurately and reliably complete the sorting of suspicious items and improve the overall security inspection and sorting efficiency.

[0017] Optionally, the method for associating the first detection information with the first area identification information includes: acquiring the first area identification information through a detection device and associating the first area identification information with the first detection information. This method directly and synchronously completes the acquisition of area identification information and item detection through the detection device, without the need for additional identification equipment and complex logic. The implementation is simple and reliable, effectively simplifying the sorting process.

[0018] Optionally, the method for determining that the first placement area has reached the end of the conveyor belt includes: obtaining the first area identification information through a sensing device to determine that the first placement area has reached the end of the conveyor belt; and / or, a second placement area is provided on the conveyor belt, the second placement area containing second area identification information, and obtaining the second area identification information through a sensing device to determine that the first placement area has reached the end of the conveyor belt. This method uses information obtained by a sensing device to locate the luggage placement area. This method can directly detect the first area identification information to determine whether the item has reached the end, or indirectly infer the location by detecting the second area identification information. The determination method is flexible and reliable, and can effectively ensure accurate sorting timing.

[0019] Optionally, the conveyor belt is provided with multiple area marker structures. The method for determining whether the first placement area has reached the end of the conveyor belt includes: using a sensing device to record the number of area marker structures passed through to determine whether the first placement area has reached the end of the conveyor belt. Specifically: the area marker structure includes a zeroing structure. When the sensing device counts to n, it indicates that the first placement area has reached the end of the conveyor belt. When the zeroing structure passes the sensing device, the count is reset to zero, where n is a preset value; or, when the detection device acquires the first area identification information, the sensing device counts to n1. When the sensing device counts to n1+n2, it indicates that the first placement area has reached the end of the conveyor belt, where n2 is a preset value. This method determines whether the placement area has reached the end by counting the area marker structures. It can use either cyclic zeroing counting or starting point accumulation counting. Both methods can achieve stable counting by utilizing the protrusions to block the photoelectric switch. The judgment logic is simple and reliable, with high positioning accuracy and strong applicability.

[0020] The security inspection system and sorting method of this invention, through the design of zone marking and precise positioning of the conveyor belt, achieves one-to-one association between items to be inspected and their placement areas, thereby achieving accurate detection and intelligent sorting of items. This solution significantly simplifies the overall structural design of the security inspection system, effectively improving the accuracy and efficiency of security inspection and sorting. It is particularly suitable for public transportation scenarios such as subways with high passenger flow and high requirements for traffic efficiency, enabling rapid detection and diversion of luggage and items while ensuring security inspection accuracy, reducing passenger waiting time at security checkpoints, and balancing security control effectiveness with passenger experience.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention clearer and easier to understand, specific embodiments of the present invention are described below. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. It should be understood that the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the security inspection system according to some embodiments of the present invention; Figure 2 These are side view schematic diagrams of security inspection systems according to some embodiments of the present invention; Figure 3 This is a schematic diagram of the overall structure of the security inspection mechanism according to some embodiments of the present invention; Figure 4 This is a schematic diagram of the connection method between the protrusion and the conveyor belt in some embodiments of the present invention; Figure 5 This is a schematic diagram of the structure of an X-ray sensing device as a sensing device according to some embodiments of the present invention. Figure 6 yes Figure 5 A cross-sectional view along the BB direction; Figure 7 This is a schematic diagram of the structure of a photoelectric switch as a sensing device according to other embodiments of the present invention; Figure 8 This is a schematic diagram of the layout structure of the identification unit according to some embodiments of the present invention; Figure 9 This is a schematic diagram of the division structure of the first and second identification units according to some embodiments of the present invention; Figure 10This is a flowchart illustrating the sorting method of a security inspection system according to some embodiments of the present invention; Figure 11 This is a schematic diagram of a method for determining whether the first placement area has reached the end of the conveyor belt, according to some embodiments of the present invention.

[0024] Among them: 1 conveyor belt, 2 detection device, 31 protrusion, 32 marking unit, 321 first marking unit, 322 second marking unit, 4 sensing device, 41 X-ray sensing device, 42 photoelectric switch, 5 sorting mechanism; Placement area A, first placement area A1, second placement area A2. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be further described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] In high-traffic security screening scenarios, the security screening system is a core system for ensuring public safety, used to identify and sort luggage containing suspicious items, thereby improving post-screening efficiency. In existing security screening and sorting technologies, to achieve accurate sorting of suspicious luggage, each piece of luggage needs to be separated in advance to avoid mishandling adjacent luggage during sorting. Common separation methods include using speed control mechanisms to adjust the speed difference of the conveyor belt to separate luggage, and using luggage trays. However, both of these methods have significant technical drawbacks: the speed reduction step in speed-adjusting separation significantly slows down the overall security screening process, easily causing congestion at security checkpoints in high-traffic scenarios such as subways and high-speed rail stations, severely reducing security screening efficiency; luggage tray separation requires a large number of additional trays, increasing the investment cost of security equipment, and the transportation, retrieval, and storage of trays require additional space. Furthermore, trays increase the operational complexity of the security screening process, limiting overall efficiency.

[0027] To address the aforementioned problems, the present invention provides a security inspection system, which includes a security inspection mechanism, comprising a conveyor belt and a detection device; the conveyor belt is provided with at least one placement area moving in the same direction as it is conveyed, and is equipped with an area marking structure for identifying the placement area; the security inspection mechanism is further provided with a sensing device capable of determining the position of at least one placement area.

[0028] In the aforementioned security inspection system, by combining the placement area with the area identification structure, the items to be inspected are accurately associated with their respective placement areas. This eliminates the need for additional speed control equipment, luggage trays, or other auxiliary structures, effectively zoning the items and simplifying the overall structure of the security inspection facility. This reduces equipment investment and maintenance costs, and improves the overall efficiency of the facility's operation. Furthermore, relying on the precise positioning of the placement area using sensors, the system can accurately match the detection information of the corresponding items when they reach the end of the security inspection facility. This provides accurate location information for subsequent sorting operations, ensuring the accuracy and timeliness of sorting suspicious items and significantly improving the overall efficiency of security inspection and sorting in high-traffic scenarios.

[0029] The security inspection system mentioned in the embodiments of this invention is applied in scenarios such as transportation hubs and public venues. It is a complete set of equipment used to identify suspicious targets among items awaiting security inspection and is a core system for ensuring public safety. The security inspection mechanism is the core execution unit of the security inspection system and is the main structure for realizing the transportation, detection, and positioning of items awaiting security inspection. The conveyor belt is the transportation component in the security inspection mechanism, used to carry and drive the items awaiting security inspection along a preset direction to achieve continuous transportation of items. Items awaiting security inspection refer to various items that need to undergo security inspection, commonly including luggage, parcels, and handbags. The detection device is the detection component in the security inspection mechanism, and its detection methods mainly include X-ray penetration detection, metal induction detection, and millimeter-wave imaging detection, which can be flexibly selected according to the accuracy requirements of the security inspection scenario. It is used to identify whether the items awaiting security inspection contain suspicious targets such as knives, flammable and explosive materials. This invention does not limit the specific detection method of the detection device; any method that can realize the feature detection of items awaiting security inspection is applicable to this invention.

[0030] In this invention, the conveyor belt's transmission direction is the first direction, which is the direction in which the items to be inspected move along the conveyor belt; the horizontal direction perpendicular to the conveyor belt's transmission direction is the width direction of the conveyor belt, and the two together constitute the planar extension direction of the conveyor belt. A placement area refers to a region defined on the conveyor belt along the first direction, used to individually carry one or more items to be inspected. This area moves in the same direction as the conveyor belt along the first direction, preferably synchronously, to achieve mutual separation of the items to be inspected. The area identification structure is a structure set on the conveyor belt, corresponding one-to-one with the placement areas, used to uniquely identify each placement area, enabling the placement area to be identifiable and locatable. The sensing device is a positioning component that cooperates with the area identification structure, achieving real-time position determination of the corresponding placement area by identifying the position of the area identification structure.

[0031] Please refer to Figure 1-9This invention provides a security inspection system, including a security inspection mechanism, which includes a conveyor belt 1 and a detection device 2. The conveyor belt 1 includes at least one placement area A arranged along a first direction, and the placement area A moves in the same direction as the conveyor belt 1. The conveyor belt 1 also includes an area identification structure for identifying the placement area A.

[0032] exist Figure 1-7 In the illustrated embodiment, the area marking structure includes a plurality of protrusions 31 disposed on the surface of the conveyor belt 1 and spaced apart along the first direction of the conveyor belt 1. The area between any two adjacent protrusions 31 constitutes a placement area A. Items to be inspected are placed between adjacent protrusions 31, using the protrusions 31 as physical boundaries to prevent items from shifting during transport, and relying on the structural features of the protrusions 31 to achieve clear marking of the placement area A.

[0033] Optionally, the protrusions 31 extend along the width direction of the conveyor belt 1, and their range may extend to both ends of the conveyor belt 1, or they may only occupy a portion of the width direction. At the same time, the spacing of the protrusions 31 in the first direction can be adjusted as needed, and is preferably equidistant.

[0034] Optionally, the protrusion 31 can be replaced by a printable coating with marking properties to reduce the interference of the protrusion 31 on the conveyor belt 1, so that the conveyor belt 1 can fit better with the roller and facilitate the smooth operation of the conveyor belt 1.

[0035] In some embodiments, please refer to Figure 4 In the first and second embodiments, the protrusion 31 is fixedly connected to the conveyor belt 1. Optionally, the protrusion 31 and the conveyor belt 1 are integrally formed, resulting in a stable and durable structure that can meet the long-term cyclic operation requirements of the conveyor belt 1; alternatively, a pre-embedded base is provided on the conveyor belt 1, and the protrusion 31 is detachably connected to the pre-embedded base (e.g., by bolts), thereby achieving the installation, fixation, and subsequent replacement of the protrusion 31. In other embodiments, the protrusion 31 and the conveyor belt 1 are elastically connected, for example, referring to... Figure 4 In a third embodiment, the protrusion 31 on one side of the conveyor belt 1 can be fixedly connected, while the other side can be connected to the conveyor belt 1 via an elastic element (such as a spring or rubber pad). This effectively buffers the collisions and impacts on the protrusion 31 caused by other components of the security system during luggage placement or conveyor belt 1 movement. Furthermore, it facilitates the fit between the conveyor belt 1 and the rollers in the bottom area of ​​the conveyor belt 1, promoting smooth operation and preventing breakage at the connection points. The above connection methods can be flexibly selected according to actual needs, and this invention does not impose any limitations on them. In the above embodiments, some protrusions 31 can be flexibly selected to adopt a fixed / integral molding method, while others can adopt an elastic connection method.

[0036] The material of the protrusion 31 can be flexibly selected according to usage requirements. In some embodiments, the protrusion 31 is made of a rigid material to ensure structural strength, effectively block items to be inspected, prevent them from shifting during transmission, and stably achieve the effect of physical partitioning. In other embodiments, the protrusion 31 is made of an elastic material, which has good anti-compression properties to prevent it from being damaged by luggage / packages. Furthermore, lead strips can be set on the protrusion 31. The form of the lead strip is not limited; it can be embedded inside the protrusion 31 or protrude from the surface of the protrusion 31, as long as it can be accurately identified and detected by the X-ray device. Alternatively, the protrusion 31 can be made directly from lead strips so that it can be accurately identified and detected by the X-ray device. In other embodiments, the main body of the protrusion 31 is made of a rigid material, and a protective layer made of an elastic material is fixedly set on the top.

[0037] The security inspection mechanism provided by this invention also includes a sensing device 4, used to determine the location of placement area A based on the area identification structure. The sensing method of the sensing device 4 can be flexibly set according to actual security inspection needs, as long as it is compatible with the readable area identification information on the area identification structure. For example, a barcode scanner can be compatible with QR codes / barcodes, a photoelectric switch 42 can be compatible with the physical shielding structure of the protrusion 31, an X-ray sensor 41 can be compatible with the identification structure with lead strips, and a visual recognition sensor can be compatible with scale lines / numbered markings, etc. Multiple sensing methods can also be used in combination to comprehensively determine the location of placement area A through multiple types of information, further improving positioning accuracy and avoiding positioning errors caused by a single sensing method. All sensing methods can achieve accurate positioning of placement area A, and this invention does not limit the specific sensing method.

[0038] exist Figure 5 In the illustrated embodiment, the sensing device 4 is an X-ray sensing device 41. In this embodiment, a lead strip is provided on the protrusion 31, or the protrusion 31 is a lead strip. The X-ray sensing device 41 continuously emits X-rays during the operation of the conveyor belt 1. Because the lead strip has a very strong absorption effect on X-rays, the signal received by the X-ray sensing device 41 will show obvious troughs or characteristic waveforms. The location of the placement area A is determined based on this characteristic. Optionally, in this embodiment, the X-ray sensing device 41 can be directly installed in the detection device 2, eliminating the need to deploy additional sensing equipment elsewhere, greatly simplifying the overall structure of the security inspection agency.

[0039] exist Figure 6In the illustrated embodiment, the sensing device 4 is a photoelectric switch 42. When the protrusion 31 passes by the photoelectric switch 42, it blocks the light path or reflects the light, triggering the photoelectric switch 42 to generate a signal. The position of the placement area A is determined based on the number of times the photoelectric switch 42 is blocked. Optionally, the photoelectric switch 42 is located at the bottom of the conveyor belt 1, which can effectively avoid interference from the items to be inspected, ensuring the accuracy of the detection.

[0040] exist Figure 8-9 In the illustrated embodiment, the area marking structure includes multiple marking units 32 spaced apart along a first direction on the conveyor belt 1, with placement area A being the area between two marking units 32. This embodiment uses marking units 32 that do not affect the placement of items to be inspected to mark placement area A. This allows the division of placement area A to be flexibly adjusted according to the size of the items to be inspected, without obstructing or interfering with the placement and transport of luggage, effectively improving the space utilization and operational efficiency of the conveyor belt 1. The structural arrangement of the marking units 32 can be implemented in various ways. For example, in one embodiment, referring to... Figure 8 In another embodiment, a flat or recessed mark, or other mark that will not affect the normal placement and transport of items to be inspected above, is directly set on the bearing surface of the conveyor belt 1 as the marking unit 32; Figure 9 The conveyor belt 1 is widened on both sides along its width direction, and identification units 32 are set in the areas reserved on both sides of the conveyor belt 1 in the width direction that are not used to place items to be inspected.

[0041] Reference Figure 9 The marking unit 32 can be lead blocks of different specifications or through holes of different specifications. Lead blocks and through holes can be set at the same time to form a combined marking. Other types of markings or combinations of multiple markings can also be selected, as long as they meet the requirements of being recognized by the sensing device 4 and not affecting the placement and transmission of luggage.

[0042] Reference Figure 9 In some embodiments, the specific method for dividing the placement area A by the identification unit 32 is as follows: when placing the item to be inspected on the conveyor belt 1, according to the maximum length of the item in the first direction, the corresponding first identification unit 321 and second identification unit 322 are matched, and the area between the two is taken as the exclusive placement area A for the item. Figure 9The area enclosed by the dotted line. For luggage of different lengths, the corresponding placement area A can be dynamically adjusted: for example, some small items may only occupy the space between two adjacent identification units 32 in the first direction, while larger items may cover multiple identification units 32 along their length in the first direction. Regardless of the size of the item to be inspected, its placement area A is jointly defined by the first identification unit 321 at the very front and the second identification unit 322 at the very back of the item in the first direction. This design improves the space utilization of the conveyor belt 1 and can flexibly adapt to items of different sizes to be inspected.

[0043] In various embodiments, the specific form of the area identification structure can be flexibly selected, which may include one of the following: scale lines, numbered markers, hollow markers, leaded markers, barcodes, or QR codes. Multiple marker forms can also be combined. These different forms of area identification structures can be flexibly selected according to actual detection accuracy, positioning requirements, and security inspection scenarios. Each area identification structure can be adapted to a corresponding identification method and sensing device 4. For example, scale lines and numbered markers are adapted to visual recognition sensors, barcodes and QR codes are adapted to barcode scanners, hollow markers are adapted to photoelectric sensors, and leaded markers are adapted to X-ray devices. The overall applicability is strong, and the implementation methods are diverse, meeting the personalized usage needs of different security inspection scenarios.

[0044] Reference Figure 1 The security inspection system also includes a sorting mechanism 5, located downstream of the security inspection mechanism, for sorting items based on the detection results from the detection device 2 and the location information of the placement area A obtained by the sensor device 4. In some embodiments, the sorting mechanism 5 may be located on one side of the conveyor belt 1 of the security inspection mechanism to receive and process items that have completed security inspection. The sorting direction of the sorting mechanism 5 is preferably perpendicular to the conveyor belt 1, so that when suspicious baggage is sorted laterally, it will not interfere with the straight transport of normal baggage, ensuring a continuous and smooth security inspection process. Alternatively, it may be set at other angles to the conveyor belt's direction depending on layout requirements. The sorting mechanism 5 may adopt conventional sorting execution structures in the art, including but not limited to belt-type, lever-type, push-bar-type, and flip-plate-type structures. This invention does not limit its specific structural form.

[0045] Corresponding to the above-mentioned security inspection system, this embodiment of the invention also provides a sorting method for the security inspection system, which is described below. Figure 10 , 11 The method will be explained in detail using an example of a specific baggage security check process: S1: A first placement area A1 is set on the conveyor belt 1 and moves in the same direction as the conveyor belt 1. The first placement area A1 contains first area identification information.

[0046] S2: Place the item to be inspected in the first placement area A1.

[0047] The placement area A, defined by the two protrusions 31, where the luggage is located in the diagram, is the first placement area A1. In this embodiment, the area structure is identified by the protrusions 31; in other embodiments, the area identification structure can also be in the form of identification units 32, in which case the first placement area A1 is defined by the first identification unit 321 and the second identification unit 322 at the front and rear ends of the luggage in a first direction; in other embodiments, the area identification structure can also adopt at least one of the following: scale lines, numbering, hollow markings, lead-containing markings, barcodes, or QR codes, or other forms that can serve an identification function. The first area identification information contained in the first placement area A1 is the identifiable and readable information on the area identification structure.

[0048] Optionally, in abnormal scenarios, if multiple pieces of luggage are stacked due to congestion on conveyor belt 1 or incorrect placement of luggage by passengers, an alarm mechanism will be triggered, and security personnel will rearrange all luggage in the area for security inspection according to the predetermined luggage placement method. That is, one or more pieces of luggage can be placed in a single first placement area A1, but the placement areas A do not overlap in the first direction of the conveyor belt.

[0049] S3: The detection device 2 detects the items to be inspected and generates the first detection information.

[0050] The conveyor belt 1 transports the luggage above to the detection device 2, which then detects the items to be inspected and generates first detection information, such as X-ray images, density data, and contraband markings. This invention does not limit the form of the first detection information.

[0051] S4: Associate the first detection information with the first region identification information.

[0052] In some embodiments, the first region identification information can be directly obtained by the detection device 2 and associated with the first detection information. In this case, the first region identification information is an information type that can be recognized by the detection device 2. In other embodiments, the first region identification information can also be obtained individually or in combination by scanning with a barcode scanner, recognizing with a visual recognition device, etc. The combination of multiple recognition methods can effectively improve the accuracy and reliability of information acquisition. Each type of identification information can be directly associated with the first detection information to achieve synchronous binding of detection information and multiple types of region identification information.

[0053] The embodiment where the first area identification information includes lead strip identification information and the detection device 2 is an X-ray device is described in detail. When the first placement area A1 passes through the X-ray device, the X-ray device sequentially scans and collects information on the area identification mark structure in front of the luggage, the luggage itself, and the area identification mark structure behind the luggage, and associates the three sets of information. If the first area identification information also includes photoelectric identification information, the photoelectric sensor can simultaneously acquire the photoelectric signals of the front and rear area identification marks during the above collection process, and the photoelectric identification information can be included in the information association, further improving the accuracy and reliability of the association between the placement area A and the detection information.

[0054] For example, in an embodiment where the identification information in the first region specifically includes small lead block identification information and photoelectric identification information, the small lead block identification information is first bound to the first detection information. The two are associated based on the same X-ray imaging, ensuring the accuracy of the association and binding. Since the small lead block identification information and the photoelectric identification information have a preset fixed association relationship, the small lead block identification information is then bound to the photoelectric identification information. By leveraging the relay role of the small lead block identification information, the first detection information and the photoelectric identification information are indirectly associated. This relay binding method can effectively avoid the error risk of direct association and improve the accuracy of information association.

[0055] The step of associating the first detection information with the first area identification information can be completed by the processor built into the security inspection agency, or by an external device with data processing capabilities such as an industrial control computer, host computer, server or independent controller. This invention does not limit the hardware subject performing the association operation or the specific implementation method.

[0056] S5: Determine whether the first detection information contains target features.

[0057] In this step, the target features can be image features, density features, or structural features of dangerous and prohibited items such as knives, flammable and explosive materials, prohibited liquids, and controlled substances. The judgment of target features can be performed by devices with computing capabilities, such as processors of security inspection agencies, external industrial control computers, host computers, or servers. Alternatively, it can be achieved by combining AI automatic recognition with manual verification. This invention does not limit the specific type of target features, the judgment subject, or the judgment method.

[0058] The above judgment process can be set with a preset judgment time limit, which can be set according to the transmission time of the luggage from the detection device 2 to the end of the conveyor belt 1, to ensure that the detection and judgment are completed before the items arrive at the sorting position, so as to reserve sufficient response time for subsequent sorting actions and ensure that the sorting process is executed in a timely and accurate manner.

[0059] S61: If the target features are included, after determining that the first placement area A1 has reached the end of the conveyor belt 1, control the sorting mechanism 5 to perform the sorting operation.

[0060] When the first detection information of the baggage contains the target characteristics, it indicates that the baggage is suspicious and needs to be sorted to the re-inspection channel (manual verification area) for secondary verification and confirmation, or sorted to the interception area for interception and control.

[0061] This step can determine whether the first placement area A1 has reached the end of the conveyor belt 1 using the sensor device 4. Further, the methods for determining whether the first placement area A1 has reached the end of the conveyor belt 1 include the following embodiments: In some embodiments, optionally, the first area identification information can be directly obtained by the sensing device 4 to determine whether the first placement area A1 has reached the end of the conveyor belt 1. For example, the sensing device 4 can be arranged at the end position of the conveyor belt 1 in the first direction. When the sensing device 4 identifies the first area identification information, it is determined that the luggage in the first placement area A1 has reached the sorting position. Optionally, referring to... Figure 11 A second placement area A2 is also provided on the conveyor belt 1, containing second area identification information. At this time, the second area identification information can also be obtained through the sensor 4 to indirectly determine whether the first placement area A1 has reached the end of the conveyor belt 1. The sensor 4 can be located at other positions besides the end of the conveyor belt 1, such as below the conveyor belt 1 or inside the detection device 2. Since there is a fixed spacing between adjacent area identification structures on the conveyor belt 1, the second placement area A2 can be pre-set according to this spacing: when the sensor 4 detects the second area identification information of the second placement area A2, the first placement area A1 has just reached the end of the conveyor belt 1. Optionally, the above two determination methods can be combined: direct determination using the first area identification information and indirect verification using the second area identification information. This dual determination mechanism can further improve the accuracy and reliability of position determination and avoid misjudgments or omissions that may occur with a single identification method.

[0062] In other embodiments, the number of area marker structures passed through can be recorded by the sensing device 4 to determine whether the first placement area A1 has reached the end of the conveyor belt 1.

[0063] In this embodiment, the area identification structure includes a zeroing structure, which can be positioned higher than other area identification structures. Taking photoelectric switch 42 as the sensing device 4 as an example, the sensing device 4 includes a zeroing switch and a counting positioning switch. To ensure counting synchronization, the zeroing switch and the counting positioning switch are arranged vertically along the height direction. For example, when both are located below the conveyor belt 1, the zeroing switch is located below the counting positioning switch, ensuring that the zeroing structure can simultaneously scan both the zeroing switch and the counting positioning switch, while other area identification structures only scan the counting positioning switch. The counting logic of photoelectric switch 42 is as follows: all area identification structures will pass through the counting positioning switch, and the count is incremented by 1 for each one passed; only the higher zeroing structure can trigger the zeroing switch, and the count is reset to zero when the zeroing structure passes through the zeroing switch. Thus, each area identification structure can correspond to a unique count value. Combined with the fixed spacing between the area identification structures, when the pre-designed value reaches n, the first placement area A1 just reaches the end of the conveyor belt 1. Optionally, the counting and positioning switch can be further divided into a counting switch and a positioning switch that are independent of each other. In this case, precise positioning can be achieved simply by limiting the installation position of the positioning switch.

[0064] The following uses specific numerical examples to illustrate this embodiment: Assume the fixed spacing between adjacent area marker structures on conveyor belt 1 is 1m, and the counting and positioning switch is installed below conveyor belt 1, 2m from its end. There are 7 area marker structures between the first placement area A1 and the zeroing structure. When the zeroing structure passes the zeroing switch, the count is reset to 0. When the area marker structure of the first placement area A1 passes the counting and positioning switch, the count is 8. Based on this, the pre-designed value n=6. That is, when the count reaches 6, it indicates that the area marker structure 2m ahead of the first placement area A1 has passed the counting and positioning switch, and at this point, the first placement area A1 has just reached the end of conveyor belt 1.

[0065] In some embodiments, a zeroing structure and a zeroing switch are not provided; position determination is achieved directly based on the fixed spacing of the area marker structures. In this embodiment, the moment when the detection device 2 acquires the first area identification information is taken as the counting starting point, and the initial count value of the sensing device 4 is n1. The sensing device 4 continues to count the area marker structures it passes through, incrementing the count value by 1 for each area marker structure passed. Since there is a fixed spacing between adjacent area marker structures, the count increment n2 can be preset. When the cumulative count value of the sensing device 4 reaches n1 + n2, it is determined that the first placement area A1 has just reached the end of the conveyor belt 1.

[0066] It is understood that the above position determination method can be further modified in various ways. For example, the counting starting point can be set to the moment when the sensor 4 first detects any area marker structure, or the counting values ​​n1 and n2 can be dynamically adjusted according to the running speed of the conveyor belt 1, or a combination of timing and counting can be used to determine the position. As long as it can accurately determine whether the first placement area A1 has reached the end of the conveyor belt 1 based on the fixed spacing of the area marker structure, the present invention does not limit the specific modification method.

[0067] The following uses specific numerical examples to illustrate: Assuming the fixed spacing between adjacent area markers on conveyor belt 1 is 1m, when detection device 2 acquires the first area identification information, the initial count value n1 of sensor device 4 is 5. At this time, the transmission distance of the first placement area A1 from the end is 8m, so the pre-designed numerical increment n2 is 8. When the cumulative count value of sensor device 4 reaches 5+8=13, it indicates that the first placement area A1 has been transmitted forward another 8m from the detection position of detection device 2, exactly reaching the end of conveyor belt 1. The system then controls sorting mechanism 5 to perform sorting operations based on the detection information.

[0068] Once it is determined that the first placement area A1 has reached the end of the conveyor belt 1, the downstream sorting mechanism 5 is controlled to perform the following operation: the sorting mechanism 5 pushes the items to be inspected in the first placement area A1 into the re-inspection channel or interception area to achieve sorting. Specific methods include, but are not limited to, horizontal conveyor belts, push rods, flippers, or robotic arms; this invention does not limit these methods.

[0069] S62: If the target feature is not included, the sorting operation will not be performed.

[0070] If the first detection information does not contain the target feature, it is determined to be normal baggage. The sorting mechanism 5 does not perform sorting operations at this time, remaining stationary or performing a bypass operation, allowing the baggage to flow out normally with the conveyor belt 1. To save system computing power, location information processing and end-point arrival determination can be performed only on the first placement area A1 determined to be suspicious baggage, without determining the location information of baggage that does not contain the target feature; of course, location information processing and end-point determination can also be performed on the placement areas corresponding to all baggage to ensure accurate sorting. This invention does not limit this approach.

Claims

1. A security inspection system, comprising a security inspection mechanism, the security inspection mechanism including a conveyor belt for conveying items to be inspected and a detection device for inspecting the items to be inspected, wherein the conveyor belt conveys items in a first direction, characterized in that, The conveyor belt includes at least one placement area arranged along a first direction, the placement area being used to carry items to be inspected and moving in the same direction as the conveyor belt, and the conveyor belt also includes a region marking structure for identifying the placement area; The security inspection mechanism also includes a sensing device that can determine the location of at least one of the placement areas based on the area identification structure.

2. The security inspection system according to claim 1, characterized in that, The area marking structure includes a plurality of protrusions disposed on the surface of the conveyor belt and extending along the width direction of the conveyor belt. The plurality of protrusions are spaced apart along a first direction, and the placement area is the area between two adjacent protrusions.

3. The security inspection system according to claim 2, characterized in that, At least one of the protrusions is integrally formed with the conveyor belt; and / or, at least one of the protrusions is elastically connected to the conveyor belt.

4. The security inspection system according to claim 2, characterized in that, The protrusion contains a lead strip, or the protrusion is a lead strip; the sensing device includes an X-ray sensing device.

5. The security inspection system according to claim 2, characterized in that, The sensing device includes a photoelectric switch, which is disposed at the bottom of the conveyor belt.

6. The security inspection system according to claim 1, characterized in that, The area marking structure includes multiple marking units disposed on the surface of the conveyor belt. The multiple marking units are spaced apart along a first direction, and the placement area is the area between two marking units.

7. The security inspection system according to claim 6, characterized in that, When placing items to be inspected on a conveyor belt, the items to be inspected have corresponding first and second marking units for their maximum length in a first direction, and the placement area is the area between the first marking unit and the second marking unit.

8. The security inspection system according to any one of claims 1-7, characterized in that, The area identification structure includes at least one of the following: scale lines, numbering, hollowed-out markings, lead-based markings, barcodes, or QR codes.

9. The security inspection system according to claim 1, characterized in that, The security inspection system also includes a sorting mechanism located downstream of the security inspection mechanism, which is used to sort the items to be inspected in the placement area based on the information generated by the detection device and the sensing device.

10. A sorting method for a security inspection system, the security inspection system comprising a security inspection mechanism and a sorting mechanism, the security inspection mechanism comprising a conveyor belt for conveying items to be inspected and a detection device for detecting the items to be inspected, characterized in that, The method includes: A first placement area is provided on the conveyor belt and moves in the same direction as the conveyor belt. The first placement area contains first area identification information. Place the items to be inspected in the first designated area; The detection device detects the item to be inspected and generates first detection information. Associate the first detection information with the first region identification information; Determine whether the first detection information contains target features; If the target feature is included, after determining that the first placement area has reached the end of the conveyor belt, the sorting mechanism is controlled to perform a sorting operation. If the target feature is not included, the sorting operation will not be performed.

11. The sorting method according to claim 10, characterized in that, The method for associating the first detection information with the first region identification information includes: obtaining the first region identification information through a detection device and associating the first region identification information with the first detection information.

12. The sorting method according to claim 10, characterized in that, The method for determining that the first placement area has reached the end of the conveyor belt includes: obtaining the first area identification information through a sensing device to determine that the first placement area has reached the end of the conveyor belt; and / or, a second placement area is provided on the conveyor belt, the second placement area contains second area identification information, and obtaining the second area identification information through a sensing device to determine that the first placement area has reached the end of the conveyor belt.

13. The sorting method according to claim 10, characterized in that, The conveyor belt is provided with multiple area marker structures, and the method for determining that the first placement area has reached the end of the conveyor belt includes: The number of times the first placement area has passed through the area marker structure is recorded by a sensing device to determine whether the first placement area has reached the end of the conveyor belt. Specifically: The area identification structure includes a zeroing structure. When the sensor counts to n, it indicates that the first placement area has reached the end of the conveyor belt. When the zeroing structure passes the sensor, the count is reset to zero. Here, n is a preset value. Alternatively, when the detection device acquires the identification information of the first area, the sensor counts as n1. When the sensor counts as n1+n2, it indicates that the first placement area has reached the end of the conveyor belt, where n2 is a preset value.

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