CN117572516A

CN117572516A - Security check machine and control method and control device for security check machine

Info

Publication number: CN117572516A
Application number: CN202311684200.9A
Authority: CN
Inventors: 潘麒杰
Original assignee: Hangzhou Ruiying Technology Co ltd
Current assignee: Hangzhou Ruiying Technology Co ltd
Priority date: 2023-12-08
Filing date: 2023-12-08
Publication date: 2024-02-20

Abstract

The application relates to a security inspection machine and a control method and a control device for the security inspection machine. Based on the application, the security inspection machine can comprise a sectional conveying mechanism, and when the effective ray scanning is not performed in the ray scanning channel, the outside-channel conveying section can be stopped by the sectional control of the sectional conveying mechanism, the inside-channel conveying section can be retracted, the automatic retraction of the inspected article can be realized while the over-inspection flow of the security inspection machine is stopped, and the normal conveying of the sectional conveying mechanism is restored to enable the automatically retracted inspected article to be subjected to the ray scanning again. Therefore, the security inspection machine can avoid manual intervention when the condition of ray scanning failure of the inspected object occurs, and further is beneficial to improving the degree of automation of security inspection. Moreover, the conveyance rate of the segmented conveyance mechanism may be controlled in segments to accommodate real-time variations in the amount of overstock while ensuring that the overstocked item is scanned at a suitable rate.

Description

Security check machine and control method and control device for security check machine

Technical Field

The present disclosure relates to security inspection apparatuses, and more particularly, to a security inspection machine, a control method for the security inspection machine, and a control device for the security inspection machine.

Background

Security check machines typically have a radiation scanning tunnel, and a transport mechanism extending through the radiation scanning tunnel. The radiation scanning channel has a channel inlet and a channel outlet, and a radiation scanning assembly is disposed in the radiation scanning channel. An inspected article (such as a package or a case) placed outside the entrance of the passage and in the conveying mechanism can be conveyed into the ray scanning passage by the conveying mechanism, a ray scanning component in the ray scanning passage can utilize transmission rays such as X rays to carry out ray scanning on the conveyed inspected article, and the inspected article after the ray scanning is conveyed out from the outlet of the ray scanning passage by the conveying mechanism.

The radiation scanning assembly may generate radiation scanning data that may be used to generate a scanned image that may include image content for characterizing internal structural features of the inspected article so that an inspector may identify whether the interior of the inspected article is occluded with dangerous or hazardous articles that endanger personal safety by viewing the scanned image.

In the actual use process of the security inspection machine, there may be a case where the inspected article fails to be effectively scanned in the radiation scanning channel, that is, the inspected article fails to be effectively scanned is not penetrated by the transmitted radiation, and that the inspected article fails to be effectively scanned means that a scanned image that can clearly exhibit the internal structural characteristics of the inspected article cannot be obtained. In this case, the inspected article can be inspected only by a inspector in a manual inspection manner, or the inspected article can be manually taken out of the entrance of the passage by the inspector and placed again on the conveying mechanism. That is, the security inspection machine needs manual intervention when the ray scanning failure of the inspected object occurs, and the full-automatic security inspection cannot be realized.

Therefore, how to improve the automation degree of the safety detection becomes a technical problem to be solved in the prior art.

Disclosure of Invention

In the embodiment of the application, a security inspection machine, a control method for the security inspection machine and a control device for the security inspection machine are provided, which are beneficial to improving the automation degree of security inspection.

An embodiment of the present application provides a security inspection machine, the security inspection machine includes:

a radiation scanning path having a path entrance and a path exit in a detection direction, the radiation scanning path further including an intra-path entrance region, a radiation scanning region, and an intra-path exit region sequentially arranged from the path entrance to the path exit in the detection direction;

a segmented transport mechanism comprising an off-road entrance transport section adjacent to the channel entrance outside the radiation scanning channel, and an on-road transport section continuously disposed in the radiation scanning channel between the channel entrance and the channel exit;

a radiation scanning assembly arranged in the radiation scanning path to radiation scan the inspected article conveyed by the segmented conveying mechanism to the radiation scanning region with transmitted radiation;

A processing assembly for:

detecting the scanning effectiveness of the inspected article conveyed along the inspection direction to the in-lane exit area in the ray scanning area, wherein the effectiveness of the ray scanning performed by the inspected article is determined based on ray scanning data generated by the ray scanning assembly and/or first visible light image detection generated by a first camera assembly; an imaging field of view of the first camera assembly covering the in-lane exit area;

controlling the off-lane entrance conveyor section to stop and controlling the in-lane conveyor section to switch to convey the inspected article in a retreat direction opposite to the over-inspection direction in response to a detection result that the radiation scanning performed by the inspected article is invalid;

controlling the out-of-lane entrance conveyor section and the in-lane conveyor section to resume conveyance in the overseeing direction in response to the overseeing article retracting in the retraction direction to the in-lane entrance area.

In some examples, optionally, the processing component is specifically configured to: detecting whether the inspected article belongs to an intensified detection object needing to be subjected to re-inspection or a missed detection object which is missed to perform ray scanning based on the first visible light image; wherein if the inspected article belonging to the intensified detection object has not been subjected to the re-inspection or the inspected article is determined to be the missing detection object, determining that the radiation scanning performed by the inspected article is invalid.

In some examples, optionally, the processing component is specifically configured to: determining an object appearance feature of the inspected article based on the first visible light image; and detecting whether the inspected object belongs to the reinforced detection object or not based on the object appearance characteristics.

In some examples, optionally, the object appearance feature comprises: the object size feature of the inspected article is used for representing the thickness size of the inspected article in the beam outgoing direction of the transmitted rays, if the thickness size is larger than a preset width threshold, the inspected article is determined to belong to the reinforced detection object, and the preset width threshold is related to the maximum attenuation thickness of the transmitted rays with a first dose; and/or an object profile feature of the inspected article, the object profile feature being used to characterize an outer profile shape of the inspected article, the inspected article being determined to belong to the enhanced detection object if the object profile feature matches a sample shape used to characterize an outer profile shape of a dangerous article; and/or the object identification feature of the over-detected object is used for representing the package identification content of the over-detected object, and if the object identification feature is matched with the sample identification for representing the package identification content of the dangerous object, the over-detected object is determined to belong to the enhanced detection object.

In some examples, optionally, the radiation scanning assembly is configured to generate the transmitted radiation at a first dose as a default dose; the processing assembly is further configured to: during a radiation scan performed for the review by re-entering the radiation scan area after the review object is retracted, the radiation scan assembly is controlled to generate the transmitted radiation at a second dose higher than the first dose.

In some examples, optionally, the processing component is specifically configured to: and detecting whether the inspected object belongs to the missing detection object missing the scanning image or not based on a matching result of the first visible light image and the generated scanning image, wherein the scanning image is generated based on ray scanning data generated by the ray scanning assembly.

In some examples, optionally, the radiation scanning assembly is configured to: in response to sensing an in-situ condition of the inspected article in the radiation scanning area, in response to the inspected article disappearing in-situ condition in the radiation scanning area, and during conveyance of the in-lane conveying section in the retraction direction; the radiation scanning data generated by the radiation scanning assembly during each start is used for generating a frame of the scanning image, the first visible light image is a single-frame acquisition image acquired from a first visible light image sequence generated by the first camera assembly, and the single-frame acquisition image is acquired from the first visible light image sequence in response to successful identification of each inspected object in the first visible light image sequence; the processing component is specifically configured to: determining whether the inspected article belongs to the omission detection object based on the image quantity relation of the first visible light image and the scanning image; and if the current first visible light image causes the image accumulation number of the first visible light image to be larger than the image accumulation number of the scanning image, determining the inspected object appearing in the current visible light image as the missing detection object.

In some examples, optionally, the radiation scanning assembly is configured to: in response to sensing an in-situ condition of the inspected article in the radiation scanning area, in response to the inspected article disappearing in-situ condition in the radiation scanning area, and during conveyance of the in-lane conveying section in the retraction direction; the absence of the scanned image is caused by the induction failure of the inspected object in the ray scanning area; the processing assembly is further configured to: and controlling the ray scanning assembly to maintain an enabled state for executing ray scanning during the period that the inspected article is retracted and re-enters the ray scanning area to be subjected to the supplementary inspection.

In some examples, optionally, the processing component is specifically configured to: controlling the in-lane conveying section to resume conveyance in the overscan direction in response to the overscan item being retracted in place in the in-lane entrance area in the retraction direction; and controlling the off-lane entrance conveyor section to resume conveyance in the overseeing direction in response to the overseeed article being conveyed again in the overseeing direction to the in-lane exit area after rollback.

In some examples, optionally, the security inspection machine further comprises a second camera assembly, an imaging field of view of the second camera assembly covering the in-lane entrance area; the processing assembly is further configured to: detecting whether the retraction of the inspected object to the in-lane entrance area is in place or not based on a second visible light image generated by the second camera assembly; and/or, based on the second visible light image generated by the second camera assembly and the system response time of the ray scanning assembly, performing the segmented adjustment of the transmission rate of the segmented transmission mechanism.

In some examples, optionally, the security inspection machine further comprises a pressure sensing device disposed at the staging mechanism, and the processing assembly is further configured to: based on the sensing result of the pressure sensing device and the system response time of the ray scanning assembly, the segmented conveying mechanism is subjected to segmented adjustment of the conveying speed.

In some examples, optionally, the intra-track transport section includes an intra-track scan transport section routed through the radiation scanning region, an intra-track entrance transport section continuously disposed between the channel entrance and the intra-track scan transport section, and an intra-track exit transport section continuously disposed between the intra-track scan transport section and the channel exit.

In some examples, optionally, the segmented transport mechanism further comprises an off-track exit transport segment adjacent the channel exit outside the radiation scanning channel.

Another embodiment of the present application provides a control method for a security inspection machine including a radiation scanning tunnel having a tunnel entrance and a tunnel exit in an overscan direction, a radiation scanning assembly including an in-tunnel entrance region, a radiation scanning region, and an in-tunnel exit region arranged sequentially from the tunnel entrance to the tunnel exit in the overscan direction, a segmented transport mechanism including an out-of-tunnel entrance transport section adjacent to the tunnel entrance outside the radiation scanning tunnel, and an in-tunnel transport section continuously disposed between the tunnel entrance and the tunnel exit in the radiation scanning tunnel, the radiation scanning assembly being arranged in the radiation scanning tunnel to scan an overscan item transported by the segmented transport mechanism to the radiation scanning region with transmission radiation, and the control method comprising:

In some examples, optionally, the detecting the scanning effectiveness of the inspected article conveyed in the over-inspection direction to the in-lane exit area in the radiation scanning area based on the first visible light image generated by the first camera assembly includes: detecting whether the inspected article belongs to an intensified detection object needing to be subjected to re-inspection or a missed detection object which is missed to perform ray scanning based on the first visible light image; wherein if the inspected article belonging to the intensified detection object has not been subjected to the re-inspection or the inspected article is determined to be the missing detection object, determining that the radiation scanning performed by the inspected article is invalid.

In some examples, optionally, the detecting, based on the first visible light image, whether the inspected article belongs to an intensified detection object that needs to be subjected to re-inspection or a missed detection object that is missed to perform ray scanning includes: determining an object appearance feature of the inspected article based on the first visible light image; and detecting whether the inspected object belongs to the reinforced detection object or not based on the object appearance characteristics.

In some examples, optionally, the radiation scanning assembly is configured to generate the transmitted radiation at a first dose as a default dose; the control method further includes: during a radiation scan performed for the review by re-entering the radiation scan area after the review object is retracted, the radiation scan assembly is controlled to generate the transmitted radiation at a second dose higher than the first dose.

In some examples, optionally, the detecting, based on the first visible light image, whether the inspected article belongs to an intensified detection object that needs to be subjected to re-inspection or a missed detection object that is missed to perform ray scanning includes: and detecting whether the inspected object belongs to the missing detection object missing the scanning image or not based on a matching result of the first visible light image and the generated scanning image, wherein the scanning image is generated based on ray scanning data generated by the ray scanning assembly.

In some examples, optionally, the radiation scanning assembly is configured to: in response to sensing an in-situ condition of the inspected article in the radiation scanning area, in response to the inspected article disappearing in-situ condition in the radiation scanning area, and during conveyance of the in-lane conveying section in the retraction direction; the radiation scanning data generated by the radiation scanning assembly during each start is used for generating a frame of the scanning image, the first visible light image is a single-frame acquisition image acquired from a first visible light image sequence generated by the first camera assembly, and the single-frame acquisition image is acquired from the first visible light image sequence in response to successful identification of each inspected object in the first visible light image sequence; the detecting whether the inspected article belongs to the missing detection object missing the scanning image based on the matching result of the first visible light image and the generated scanning image comprises: determining whether the inspected article belongs to the omission detection object based on the image quantity relation of the first visible light image and the scanning image; and if the current first visible light image causes the image accumulation number of the first visible light image to be larger than the image accumulation number of the scanning image, determining the inspected object appearing in the current visible light image as the missing detection object.

In some examples, optionally, the radiation scanning assembly is configured to: in response to sensing an in-situ condition of the inspected article in the radiation scanning area, in response to the inspected article disappearing in-situ condition in the radiation scanning area, and during conveyance of the in-lane conveying section in the retraction direction; the absence of the scanned image is caused by the induction failure of the inspected object in the ray scanning area; the control method further includes: and controlling the ray scanning assembly to maintain an enabled state for executing ray scanning during the period that the inspected article is retracted and re-enters the ray scanning area to be subjected to the supplementary inspection.

In some examples, optionally, the controlling the out-of-lane entrance conveyor section and the in-lane conveyor section to resume conveyance in the oversee direction in response to the oversee item retracting in the retraction direction to the in-lane entrance area comprises: controlling the in-lane conveying section to resume conveyance in the overscan direction in response to the overscan item being retracted in place in the in-lane entrance area in the retraction direction; and controlling the off-lane entrance conveyor section to resume conveyance in the overseeing direction in response to the overseeed article being conveyed again in the overseeing direction to the in-lane exit area after rollback.

In some examples, optionally, the security inspection machine further comprises a second camera assembly, an imaging field of view of the second camera assembly covering the in-lane entrance area; the control method further includes: detecting whether the retraction of the inspected object to the in-lane entrance area is in place or not based on a second visible light image generated by the second camera assembly; and/or, based on the second visible light image generated by the second camera assembly and the system response time of the ray scanning assembly, performing the segmented adjustment of the transmission rate of the segmented transmission mechanism.

In some examples, optionally, the security inspection machine further comprises a pressure sensing device disposed at the staging mechanism, and the control method further comprises: based on the sensing result of the pressure sensing device and the system response time of the ray scanning assembly, the segmented conveying mechanism is subjected to segmented adjustment of the conveying speed.

Another embodiment of the present application provides a control apparatus for a security inspection machine including a radiation scanning tunnel having a tunnel entrance and a tunnel exit in an over-inspection direction, a radiation scanning assembly including an in-tunnel entrance region, a radiation scanning region, and an in-tunnel exit region arranged sequentially from the tunnel entrance to the tunnel exit in the over-inspection direction, a segmented transport mechanism including an out-of-tunnel entrance transport section adjacent to the tunnel entrance outside the radiation scanning tunnel, and an in-tunnel transport section continuously disposed between the tunnel entrance and the tunnel exit in the radiation scanning tunnel, the radiation scanning assembly being arranged in the radiation scanning tunnel to scan an over-inspected article transported by the segmented transport mechanism to the radiation scanning region with transmission radiation, and the control apparatus comprising:

An effectiveness discriminating module for detecting a scanning effectiveness of the inspected article conveyed in the over-inspection direction to the in-lane exit area in the radiation scanning area, wherein the effectiveness of the radiation scanning performed by the inspected article is determined based on radiation scanning data generated by the radiation scanning assembly and/or a first visible light image generated by a first image capturing assembly; an imaging field of view of the first camera assembly covering the in-lane exit area;

a transmission control module for:

In some examples, optionally, the valid discrimination module is specifically configured to: detecting whether the inspected article belongs to an intensified detection object needing to be subjected to re-inspection or a missed detection object which is missed to perform ray scanning based on the first visible light image; wherein if the inspected article belonging to the intensified detection object has not been subjected to the re-inspection or the inspected article is determined to be the missing detection object, determining that the radiation scanning performed by the inspected article is invalid.

In some examples, optionally, the valid discrimination module is specifically configured to: determining an object appearance feature of the inspected article based on the first visible light image; and detecting whether the inspected object belongs to the reinforced detection object or not based on the object appearance characteristics.

In some examples, optionally, the radiation scanning assembly is configured to generate the transmitted radiation at a first dose as a default dose; the control device further includes: and the scanning control module is used for controlling the ray scanning assembly to generate the transmission rays at a second dose higher than the first dose in the period that the inspected article is retracted and reenters the ray scanning area to be used for ray scanning of the re-inspection.

In some examples, optionally, the valid discrimination module is specifically configured to: and detecting whether the inspected object belongs to the missing detection object missing the scanning image or not based on a matching result of the first visible light image and the generated scanning image, wherein the scanning image is generated based on ray scanning data generated by the ray scanning assembly.

In some examples, optionally, the control device further comprises: a scan control module for activating the radiation scanning assembly in response to sensing an in-situ condition of the inspected article in the radiation scanning area, for shutting down in response to the in-situ condition of the inspected article in the radiation scanning area disappearing, and for shutting down the radiation scanning assembly during conveyance of the in-lane conveying section in the retraction direction; the radiation scanning data generated by the radiation scanning assembly during each start is used for generating a frame of the scanning image, the first visible light image is a single-frame acquisition image acquired from a first visible light image sequence generated by the first camera assembly, and the single-frame acquisition image is acquired from the first visible light image sequence in response to successful identification of each inspected object in the first visible light image sequence; the effective discriminating module is specifically configured to: determining whether the inspected article belongs to the omission detection object based on the image quantity relation of the first visible light image and the scanning image; and if the current first visible light image causes the image accumulation number of the first visible light image to be larger than the image accumulation number of the scanning image, determining the inspected object appearing in the current visible light image as the missing detection object.

In some examples, optionally, the control device further comprises: a scan control module for activating the radiation scanning assembly in response to sensing an in-situ condition of the inspected article in the radiation scanning area, for shutting down in response to the in-situ condition of the inspected article in the radiation scanning area disappearing, and for shutting down the radiation scanning assembly during conveyance of the in-lane conveying section in the retraction direction; the absence of the scanned image is caused by the induction failure of the inspected object in the ray scanning area; the scanning control module is also used for controlling the ray scanning assembly to keep an enabling starting state for executing ray scanning in the period that the inspected article is retracted and enters the ray scanning area again to be subjected to the supplementary inspection.

In some examples, optionally, the transmission control module is specifically configured to: controlling the in-lane conveying section to resume conveyance in the overscan direction in response to the overscan item being retracted in place in the in-lane entrance area in the retraction direction; and controlling the off-lane entrance conveyor section to resume conveyance in the overseeing direction in response to the overseeed article being conveyed again in the overseeing direction to the in-lane exit area after rollback.

In some examples, optionally, the security inspection machine further comprises a second camera assembly, an imaging field of view of the second camera assembly covering the in-lane entrance area; the transmission control module is further configured to: detecting whether the retraction of the inspected object to the in-lane entrance area is in place or not based on a second visible light image generated by the second camera assembly; and/or, based on the second visible light image generated by the second camera assembly and the system response time of the ray scanning assembly, performing the segmented adjustment of the transmission rate of the segmented transmission mechanism.

In some examples, optionally, the security inspection machine further comprises a pressure sensing device disposed at the staging mechanism, and the transfer control module is further to: based on the sensing result of the pressure sensing device and the system response time of the ray scanning assembly, the segmented conveying mechanism is subjected to segmented adjustment of the conveying speed.

Another embodiment of the present application provides a non-transitory computer readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the control method of the previous embodiment.

Based on embodiments of the present application, a security inspection machine may include a segmented transport mechanism that is segmented independently controlled, and a first camera assembly. The ray scanning data generated by the ray scanning assembly and/or the first visible light image generated by the first camera assembly can be used for judging whether the inspected article is subjected to effective ray scanning, and each time the inspected article fails to be subjected to effective ray scanning in the ray scanning channel, the outside-channel entrance conveying section is stopped and the inside-channel conveying section is retracted through the sectional control of the sectional conveying mechanism, so that the automatic retraction of the inspected article is realized while the over-inspection flow of the security inspection machine is stopped, and the normal conveying of the sectional conveying mechanism is restored to enable the automatically retracted inspected article to be subjected to ray scanning again. Therefore, the security inspection machine can avoid manual intervention when the condition of ray scanning failure of the inspected object occurs, and further is beneficial to improving the degree of automation of security inspection.

Drawings

The following drawings are only illustrative of the present application and do not limit the scope of the present application:

FIG. 1 is an exemplary structural schematic diagram of a security inspection machine in an embodiment of the present application;

Fig. 2 is a schematic diagram of the working principle of the security inspection machine in the embodiment of the application;

fig. 3 is a schematic state switching diagram of a segmented conveying mechanism of a security inspection machine in an embodiment of the present application;

fig. 4 is a schematic diagram of a first working example of the security inspection machine in the embodiment of the present application;

fig. 5 is a schematic diagram of a second working example of the security inspection machine in the embodiment of the present application;

FIG. 6 is an exemplary flow chart of a control method for a security check machine in an embodiment of the present application;

FIG. 7 is a schematic flow chart of a control method for a security inspection machine according to an embodiment of the present application;

FIG. 8 is a first example flow chart of a control method for a security inspection machine in an embodiment of the present application;

FIG. 9 is a second example flow chart of a control method for a security inspection machine in an embodiment of the present application;

fig. 10 is an exemplary structural schematic diagram of a control device for a security inspection machine in an embodiment of the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below by referring to the accompanying drawings and examples.

Fig. 1 is an exemplary structural schematic diagram of a security inspection machine in an embodiment of the present application. Fig. 2 is a schematic diagram of the working principle of the security inspection machine in the embodiment of the application. Referring to fig. 1 and 2, in an embodiment of the present application, a security inspection machine may include a radiation scanning tunnel 10, a radiation scanning assembly 20, a staging mechanism 30, a first camera assembly 50, and a processing assembly 90.

In the embodiment of the present application, the radiation scanning path 10 has a path entrance 10a and a path exit 10b in the over-examination direction, and the radiation scanning path 10 includes an in-path entrance region s_in, a radiation scanning region s_scan, and an in-path exit region s_out sequentially arranged between the path entrance 10a and the path exit 10b in the over-examination direction.

Wherein the over-detection direction may be a direction parallel to the channel extending direction X of the radiation scanning channel 10 and having directivity from the channel inlet 10 to the channel outlet 10; based on the arrangement order in the over-detection direction, the in-channel entrance region s_in is adjacent to the channel entrance 10a, the in-channel exit region s_out is adjacent to the channel exit 10b, and the radiation scanning region s_scan is located between the in-channel entrance region s_in and the in-channel exit region s_out.

For example, the radiation scanning path 10 may include a shield case (e.g., a rigid case containing lead) having openings at both ends, in which case the openings at both ends of the shield case may be configured as a path entrance 10a and a path exit 10b of the radiation scanning path 10, respectively, and a closed-case inner space of the shield case between the openings at both ends may be divided into an intra-path entrance region s_in, a radiation scanning region s_scan, and an intra-path exit region s_out.

Preferably, the passage entrance 10a and the passage exit 10b of the radiation scanning passage 10 may be respectively hung with a shielding curtain (for example, a flexible curtain containing lead), in which case the passage between the passage entrance 10a and the passage exit 10b is achieved by lifting the shielding curtain by physical contact with both the passage entrance 10a and the passage exit 10b when the inspected article 80 enters the radiation scanning passage 10 from the passage entrance 10a and leaves the transmission passage 10 from the passage exit 10 b.

In an embodiment of the present application, the radiation scanning assembly 20 may be arranged in the radiation scanning tunnel 10, and the radiation scanning assembly 20 may be arranged in the radiation scanning tunnel 10 to radiation scan the inspected article 80 conveyed to the radiation scanning area s_scan in the over-inspection direction with the transmitted radiation, i.e. the radiation scanning area s_scan in the radiation scanning tunnel 10 may be a coverage area of the transmitted radiation generated by the radiation scanning assembly 20, and the in-tunnel entrance area s_in and the in-tunnel exit area s_out are interval areas between the radiation scanning area s_scan and the tunnel entrance 10a and the tunnel exit 10b, respectively.

The radiation scanning assembly 20 may include, among other things, a radiation source 21 for generating transmitted radiation, such as X-rays, and a detector 22 for generating radiation scan data by sensing the transmitted radiation.

In the drawings of the present application, it is exemplarily shown that the radiation source 21 and the detector 22 can be arranged spaced apart opposite to each other in a radiation scanning area S _ scan of the radiation scanning tunnel 10. For example, in the illustrated expression of the embodiment of the present application, the radiation source 21 and the detector 22 are arranged at a distance from each other in the channel height direction Z of the radiation scanning channel 10 as an example, but it is understood that the radiation source 21 and the detector 22 may also be arranged at a distance from each other in the channel width direction Y of the radiation scanning channel 10, which is not limited in the embodiment of the present application.

Based on the above-described arrangement of the radiation source 21 and the detector 22 of the radiation scanning assembly 20 in a relatively spaced arrangement, the radiation scanning assembly 20 may be configured to perform a transmission scan on the inspected article 80 using transmission radiation, in particular, transmission radiation generated by the radiation source 21 after penetrating the inspected article 80 may be projected onto respective sensing elements of the sensing array of the detector 22, so that the detector 20 may generate radiation scanning data based on the transmission radiation penetrating the inspected article 80, the radiation scanning data being used to characterize an energy distribution of the transmission radiation attenuated by penetrating the inspected article.

As an alternative to transmission scanning, back-scatter scanning may also be used. That is, unlike the illustrations in the drawings of the present application, the radiation source 21 and the detector 22 may also be arranged on the same side of the radiation scanning area s_scan of the radiation scanning channel 10. For example, in the illustrated expression of the embodiment of the present application, the radiation source 21 and the detector 22 may be arranged on the same side in the channel height direction Z or the channel width direction Y of the radiation scanning channel 10, to which the embodiment of the present application is not limited.

Based on the above-described arrangement in which the radiation source 21 and the detector 22 of the radiation scanning assembly 20 are disposed on the same side, the radiation scanning assembly 20 may be configured to perform a back-scattering scan on the inspected article 80 using the transmitted radiation, specifically, a portion of the transmitted radiation generated by the radiation source 21 may penetrate the inspected object, and another portion may be back-scattered in the internal material of the inspected article 80, and the back-scattering angle may be in the range of 0 ° to 180 °, so that the detector 22 may generate radiation scanning data based on the transmitted radiation back-scattered by the inspected article 80, where the radiation scanning data is used to characterize the energy distribution of the transmitted radiation back-scattered by the inspected article. If the internal material contains dangerous materials such as low atomic number materials (such as drugs and explosives) that endanger personal safety, the transmitted radiation backscattered by the inspected article has a stronger energy, i.e. the backscattering effect of the low atomic number materials on the transmitted radiation is more pronounced.

In embodiments of the present application, whether a ray scan employs a transmission scan or a backscatter scan, "scan" in a ray scan may refer to: the transmitted radiation sequentially passes through different portions of the inspected article 80 conveyed in the inspected direction. That is, different portions of the inspected article 80 moving in the radiation scanning path 10 may be sequentially penetrated by the transmitted radiation and/or cause back scattering of the transmitted radiation in the radiation scanning region s_scan, and the detector 22 may be specifically used to characterize a local energy distribution of the transmitted radiation attenuated by sequentially penetrating the respective local portions of the inspected article 80 or a local energy distribution of the transmitted radiation back-scattered from the respective local portions of the inspected article 80 based on radiation scanning data generated by the transmitted radiation penetrating through the inspected article 80 or the transmitted radiation back-scattered by the inspected article 80, so that the detector 22 may generate a plurality of radiation scanning data during the period in which the respective local portions of the inspected article 80 sequentially move through the radiation scanning region s_scan.

For example, the radiation scanning assembly 20 may further comprise a lead-containing collimating element, which may form a partial shielding of the transmitted radiation generated by the radiation source 21, such that the radiation transmitted through the lead-containing collimating element towards the detector 20 may be distributed, such as in a fan-like manner, and the fan-like manner may be perpendicular to the direction of passage extension X of the radiation scanning passage 10. In this case, the detector 22 may be a linear array of sensing units distributed linearly, where the array length direction of the linear array is parallel to the sector formed by the transmitted rays, and the ray scan data generated by the linear array each time may be used to characterize the linear energy distribution of the transmitted rays after they are attenuated by passing through the linear portion of the inspected article 80.

A scan image including the complete inspected article 80 may be generated based on a combination of the plurality of ray scan data, the scan image including the complete inspected article 80 may reflect a global energy distribution of transmitted rays attenuated by passing through all local portions of the inspected article 80 or a global energy distribution of transmitted rays backscattered from all local portions of the inspected article 80 using pixel values of the respective pixels, and the global energy distribution may be used to identify internal structural features of the inspected article 80. Preferably, the process of generating the scan image based on the radiation scan data may further include performing a processing process such as pseudo color processing (pseudo color) on the radiation scan data, so that each pixel of the scan image may have a colorized pixel value, and further, the internal structural feature of the inspected article 80 is more conveniently observed and identified.

In the embodiment of the present application, if the ray scanning adopts transmission scanning, the ray scanning data may be referred to as transmission scanning data, and the scanning image may be referred to as transmission image; if the ray scan employs a backscatter scan, the ray scan data may be referred to as backscatter scan data and the scan image may be referred to as a backscatter image.

In embodiments of the present application, the radiation scanning assembly 20 may be controlled by the processing assembly 90, and the processing assembly 90 may control the radiation scanning assembly 20 (i.e., the radiation source 21) to generate transmitted radiation during the passage of the inspected article 80 through the radiation scanning region S_scan, and control the radiation scanning assembly 20 (i.e., the detector 22) to generate radiation scanning data during the passage of the inspected article 80 through the radiation scanning region S_scan.

For example, for a single item interval overstock scenario where a predetermined interval between individual overstocks is maintained between a plurality of overstocked items, a first photo-sensing device (such as a photosensor) may be disposed at the intersection of the in-lane entrance area s_in and the radiation scanning area s_scan, and a second photo-sensing device (such as a photosensor) may be disposed at the intersection of the in-lane exit area s_out and the radiation scanning area s_scan. When any part of the inspected article 80 is within the sensing range of the first photoelectric sensing device, the signal state of the sensing signal generated by the first photoelectric sensing device may be a valid state in place, which indicates that the inspected article 80 is in the radiation scanning area s_scan; similarly, when any portion of the inspected article 80 is within the sensing range of the second photo-sensing device, the signal state of the sensing signal generated by the second photo-sensing device may be an in-place valid state indicating that the inspected article 80 is in the radiation scanning area s_scan. Moreover, the processing assembly 90 may control the radiation scanning assembly 20 (i.e., the radiation source 21) to generate transmitted radiation during the passing of the inspected article 80 through the radiation scanning region s_scan and control the radiation scanning assembly 20 (i.e., the detector 22) to generate radiation scanning data during the passing of the inspected article 80 through the radiation scanning region s_scan during a period in which the sensing signal generated by at least one of the first and second photo sensing devices is in the in-situ active state.

For example, in another embodiment of the present application, the security inspection machine may further include a pressure sensing device disposed on the segmented conveying mechanism 30, and if the pressure sensing device disposed on the in-lane conveying section 32 includes a first pressure sensing device located at the intersection of the in-lane entrance area s_in and the radiation scanning area s_scan and a second pressure sensing device located at the intersection of the in-lane exit area s_out and the radiation scanning area s_scan, the signal states of the sensing signals generated by the first pressure sensing device and/or the second sensing device may be in an in-place valid state indicating that the inspected article 80 is in the radiation scanning area s_scan when the gravity of the inspected article 80 is applied to at least one of the first pressure sensing device and the second sensing device through any portion. Moreover, the processing assembly 90 may control the radiation scanning assembly 20 (i.e., the radiation source 21) to generate transmitted radiation during the passage of the inspected article 80 through the radiation scanning region S_scan and control the radiation scanning assembly 20 (i.e., the detector 22) to generate radiation scanning data during the passage of the inspected article 80 through the radiation scanning region S_scan during a period in which the sensing signal generated by at least one of the first and second pressure sensing devices is in the in-situ active state.

That is, the radiation scanning assembly 20 may be configured to activate only the inspected article 80 having an in-place at the radiation scanning region s_scan, i.e., the radiation scanning assembly 20 may be configured to: is activated in response to sensing the presence of the inspected article 80 in the radiation scanning area S _ scan, and is deactivated in response to the absence of the presence of the inspected article 80 in the radiation scanning area S _ scan. Thus, a corresponding one of the scan images may be generated based on the radiation scan data of the radiation scan assembly 20 during each of the activations.

Moreover, the radiation dose of the transmitted radiation generated by the radiation scanning assembly 20 (i.e., the radiation source 21) and the data frame rate of the radiation scanning data generated by the radiation scanning assembly 20 (i.e., the detector 22) may also be controlled by the processing assembly 90.

In an embodiment of the present application, the segmented transport mechanism 30 may include an off-road entrance transport segment 31 that adjoins the road entrance 10a outside the radiation scanning road 10 (i.e., adjoins the on-road transport segment 32 at the road entrance 10 a), an on-road transport segment 32 that is continuously disposed between the road entrance 10a and the road exit 10b in the radiation scanning road 10, and an off-road exit transport segment 33 that adjoins the road exit 10b outside the radiation scanning road 10 (i.e., adjoins the on-road transport segment 32 at the road exit 10 b). Wherein the off-road entrance transport section 31 and the off-road exit transport section 33 may be collectively referred to as off-road transport sections, the deployment range of the in-road transport section 32 extends through the in-road entrance region s_in, the radiation scanning region s_scan, and the in-road exit region s_out of the radiation scanning channel 10, and based on such deployment, the radiation scanning assembly 20 is arranged in the radiation scanning channel 10 to perform radiation scanning with transmitted radiation on the inspected article 80 transported by the segmented transport mechanism 20 to the radiation scanning region s_scan.

In the embodiment of the present application, the in-lane conveying section 32 and the out-of-lane inlet conveying section (i.e., the out-of-lane inlet conveying section 31 and the out-of-lane outlet conveying section 33) of the segmented conveying mechanism 30 are physically independent of each other, and the in-lane conveying section 32 and the out-of-lane inlet conveying section (i.e., the out-of-lane inlet conveying section 31 and the out-of-lane outlet conveying section 33) of the segmented conveying mechanism 30 may be independently controlled, i.e., any one of the on-off state, the conveying direction, and the conveying rate of the in-lane conveying section 32, and the out-of-lane inlet conveying section 31 and the out-of-lane outlet conveying section 33 may be independently controlled.

For example, as for the conveying direction, in the embodiment of the present application, the in-lane conveying section 32 of the segmented conveying mechanism 30 may support forward conveying in the over-inspection direction and reverse conveying in the reverse direction to the over-inspection direction, that is, the reverse direction may be a direction parallel to the lane extending direction X and having opposite directivity to the over-inspection direction, the inspected article conveyed by the in-lane conveying section 32 in the over-inspection direction may sequentially pass through the in-lane entrance area s_in, the ray scanning area s_scan, and the in-lane exit area s_out in the ray scanning lane 10, whereas the inspected article conveyed by the in-lane conveying section 32 in the reverse direction may sequentially pass through the in-lane exit area s_out, the ray scanning area s_scan, and the in-lane entrance area s_in in the ray scanning lane 10; the off-track conveying sections (i.e., the off-track entrance conveying section 31 and the off-track exit conveying section 33) of the segmented conveying mechanism 30 may support at least forward conveyance in the oversee direction, forward conveyance of the off-track entrance conveying section 31 in the off-track conveying section in the oversee direction may cause an oversee item to be fed into the radiation scanning channel 10 from outside the radiation scanning channel 10 through the channel entrance 10a (i.e., into the in-track entrance region s_in), and forward conveyance of the off-track exit conveying section 33 in the off-track conveying section in the oversee direction may cause an oversee item to be conveyed out of the radiation scanning channel 10 from the radiation scanning channel 10 (i.e., from the in-track exit region s_out) through the channel exit 10b away from the radiation scanning channel 10.

For another example, for the segmented control of the transfer rate, in embodiments of the present application, the security check machine may further include a pressure sensing device disposed at the segmented transfer mechanism 30, and in particular, the pressure sensing device may be disposed at any location of at least one of the off-track entrance transfer section 31, the on-track transfer section 32, and the off-track transfer section 33. In this case, the processing component 90 may determine the distribution of the conveying positions of the inspected articles currently carried by the segmented conveying mechanism 30 based on the sensing result of the pressure sensing device, and the processing component 90 may also adjust the conveying rates of the off-road entrance conveying section 31, the in-road conveying section 32, and the off-road exit conveying section 33 in segments based on the distribution of the conveying positions of the inspected articles currently carried by the segmented conveying mechanism 30. In the case of performing the segment control of the transfer rates of the off-track entrance transfer section 31, the in-track transfer section 32, and the off-track exit transfer section 33, it is preferable to ensure the transfer rate of the in-track transfer section 32 in the oversee direction (i.e., the transfer rate of forward transfer) such that: the inspected article 80 passes through the radiation scanning region S_scan at a rate that matches the system integration time of the radiation scanning assembly 20, where the system integration time of the radiation scanning assembly 20 refers to the system response time that satisfies the radiation scanning assembly 20 to complete the generation of primary radiation scan data.

In the embodiment of the present application, for a single-article interval overstock scenario in which a predetermined interval is maintained between a plurality of overstocked articles, the conveyance rate of the in-lane conveyance section 32 and the out-of-lane exit conveyance section 33 in the overstock direction (i.e., the conveyance rate of the forward conveyance) may be adjusted to be higher than the conveyance rate of the out-of-lane entrance conveyance section 31 in the overstock direction (i.e., the conveyance rate of the forward conveyance) to facilitate the feeding of the overstock articles 80 into the radiation scanning tunnel 10 from the tunnel entrance 10 by the out-of-lane entrance conveyance section 31, the interval distance between the other overstock articles that subsequently enter the radiation scanning tunnel 10 can be increased in the tunnel extension direction X, thereby facilitating the formation of a sufficient interval distance between the plurality of overstocked articles that successively enter the radiation scanning tunnel 10 to cause the radiation scanning assembly 20 to be turned on and off once.

In the embodiment of the present application, the intra-track conveying section 32 may specifically include an intra-track scanning conveying section 322 routed through the radiation scanning area s_scan, an intra-track entrance conveying section 321 continuously disposed between the track entrance 10a and the intra-track scanning conveying section 322, and an intra-track exit conveying section 323 continuously disposed between the intra-track scanning conveying section 322 and the track exit 10b, that is, the intra-track conveying section 32 may include an intra-track entrance conveying section 321, an intra-track scanning conveying section 322, and an intra-track exit conveying section 323 adjacently arranged between the track entrance 10a and the track exit 10b, wherein the disposition range of the intra-track entrance conveying section 321 partially overlaps with or completely overlaps with the intra-track entrance area s_in of the radiation scanning channel 10 in the track extension direction X, the disposition range of the intra-track exit conveying section 323 partially overlaps with or completely overlaps with the intra-track exit area s_out of the radiation scanning channel 10 in the track extension direction X, and the intra-track entrance conveying section 321, the intra-track exit conveying section 323 may be partially overlapped with or completely overlapped with the intra-track exit area s_out of the radiation scanning channel 10, and the intra-track entrance conveying section 321, and the intra-track exit conveying section 322 may be controlled to be controlled in the track exit conveying section s_out and the track exit conveying section 322 independently in any of the track entrance conveying direction.

In this case, the security inspection machine may further include a pressure sensing device disposed at the segmented conveying mechanism 30, the pressure sensing device may be disposed at any position of at least one of the in-lane entrance conveying section 321, the in-lane scan conveying section 322, the in-lane exit conveying section 323, and the out-of-lane exit conveying section 33 of the out-lane entrance conveying section 31, for example, the first pressure sensing device described above may be disposed at an adjacent end of the in-lane entrance conveying section 321 near the in-lane scan conveying section 322, and the second pressure sensing device described above may be disposed at an adjacent end of the in-lane exit conveying section 323 near the in-lane scan conveying section 322. Thus, the processing assembly 90 may also be configured to: based on the sensing result of the pressure sensing device and the system response time of the radiation scanning assembly 20, the segmented adjustment of the transfer rate of the segmented transfer mechanism 30, that is, the segmented adjustment of the transfer rates of the off-road entrance transfer segment 31, the on-road entrance transfer segment 321, the on-road scan transfer segment 322, the on-road exit transfer segment 323, and the off-road exit transfer segment 33, is performed, wherein the system response time of the radiation scanning assembly 20 is considered when the segmented adjustment of the transfer rate is performed in order to ensure that the transfer rate of the on-road scan transfer segment 322 in the overscan direction (i.e., the transfer rate of the forward transfer) matches the system response time of the radiation scanning assembly 20.

In the illustrated expression of the embodiment of the present application, the conveying members (e.g., the pulley sets) of the same specification, including at least the conveying members (e.g., the pulley sets) having the same dimensions in the lane extending direction X and the lane width direction Y, may be arranged in the in-lane entrance conveying section 321, the in-lane scanning conveying section 322, the in-lane exit conveying section 323, the out-lane entrance conveying section 31, and the out-of-lane exit conveying section 33, and such an arrangement may facilitate versatility of the conveying members provided for the respective conveying sections of the segmented conveying mechanism 30. In this case, the in-track entrance transport section 321, the in-track scan transport section 322, and the in-track exit transport section 323 are partially overlapped with the in-track entrance region s_in, the ray scan region s_scan, and the in-track exit region s_out in order in the channel extending direction X, that is, the sectioning boundaries of the in-track transport section 322 may not exactly match the sectioning boundaries of the in-track entrance region s_in, the ray scan region s_scan, and the in-track exit region s_out.

It can be seen that, in accordance with embodiments of the present application, the conveyance rate of staging mechanism 30 may be controlled in stages to accommodate real-time variations in the amount of overstock while ensuring that the overstocked article is scanned with radiation at a suitable rate.

The first camera assembly 50 may be deployed within the radiation scanning tunnel 10, the imaging field of view of the first camera assembly 50 may cover the in-tunnel exit region s_out in the radiation scanning tunnel 10, and the first camera assembly 50 is configured to continuously generate a first sequence of visible light images while the security camera is in operation. For example, the first image pickup assembly 50 may include an optical lens, and a visible light-sensitive element such as a CCD (Charge Coupled Device ) or CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor), and the first image pickup assembly 50 may be an IPC (Internet Protocol Camera, web camera).

The processing assembly 90 may be used to control the radiation scanning assembly 20, generate scan images based on radiation scan data generated by the radiation scanning assembly 20 (i.e., the detector 22), control the segmented transport mechanism 30, and perform intelligent processing such as object recognition on the first sequence of visible light images generated by the first imaging assembly 50.

For example, the processing component 90 may include at least one of a processing element such as a CPU (central processing unit ), a logic device such as an FPGA (Field-Programmable Gate Array, field programmable gate array), an image signal processor such as a GPU (Graphics Processing Unit ), and an AI (Artificial Intelligence, artificial intelligence) processing unit.

The processing component 90 performs object recognition on the first sequence of visible light images to target the inspected article 80, and may find the inspected article 80 that is routed along the overscan direction through the radiation scanning region s_scan of the radiation scanning channel 10 and is conveyed to the intra-channel exit region s_out of the radiation scanning channel 10, and based on the object recognition result, the processing component 90 may be configured to:

detecting the validity of the radiation scan of the inspected article 80 transmitted in the over-detection direction to the in-lane exit region s_out of the radiation scan path 10 in the radiation scan region s_scan, wherein the validity of the radiation scan performed by the inspected article may be determined based on radiation scan data generated by the radiation scan assembly 20 and/or the first visible image detection generated by the first camera assembly 40, wherein an evaluation index for detecting the validity of the radiation scan based on the radiation scan data may include an image quality of a scan image generated using the radiation scan data (including but not limited to a display sharpness, an image resolution, or a severity of image noise/artifacts, etc. of the inspected article), or an inspected article detection result in the scan image (including but not limited to whether the inspected article is detected, a high or low level of detection result accuracy, etc.), the first visible image may be one of a first frame of the inspected article 80 in a first sequence of visible images generated by the first camera assembly 50, for example, the first visible image may be a first frame of the first visible image may be successfully acquired from the first sequence of the inspected article, or the first sequence of the first frame of the first visible image may be successfully acquired from the first frame of the inspected article; it should be understood that, in the case of detecting the validity of the radiation scan based on the radiation scan data, the security inspection machine in the embodiment of the present application may include the first image capturing component 40, or may not include the first image capturing component 40, and in the case of including the first image capturing component 40, the moving position of the inspected object in the channel may be determined based on the visible light image acquired by the first image capturing component 40;

In response to a detection result that the radiation scanning of the inspected article 80 currently reaching the in-lane exit area s_out at the radiation scanning area s_scan is invalid, the off-lane entrance conveying section 31 of the segmented conveying mechanism 30 is controlled to stop and the in-lane conveying section 32 is controlled to switch to convey the inspected article 80 in the backward direction opposite to the over-inspection direction, wherein during a period in which the in-lane conveying section 32 of the segmented conveying mechanism 30 reversely conveys the inspected article 80 in the backward direction, the conveyance (i.e., forward conveyance) of the off-lane exit conveying section 33 of the segmented conveying mechanism 30 in the over-inspection direction may be allowed to remain, or the off-lane exit conveying section 33 of the segmented conveying mechanism 30 may also be controlled to stop, and the radiation scanning assembly 20 may be further configured to be turned off during a conveyance period of the in-lane conveying section 32 in the backward direction;

in response to the inspected article 80 being retracted in the retraction direction to the in-lane entrance area s_in of the radiation scanning path 10, the out-of-lane entrance conveying section 31 and the in-lane conveying section 32 of the segmented conveying mechanism 30 are controlled to resume conveyance in the over-inspection direction (i.e., forward conveyance).

Based on embodiments of the present application, the security check machine may include a segmented conveyor mechanism 30 that is controlled independently in segments, and a first camera assembly 50. The radiation scanning data generated by the radiation scanning assembly 20 and/or the first visible light image generated by the first camera assembly 50 can be used for judging whether the inspected article 80 is effectively radiation scanned, and each time the inspected article 80 fails to be effectively radiation scanned in the radiation scanning channel 10, the off-track entrance conveying section 31 and the in-track conveying section 32 can be stopped by the sectional control of the sectional conveying mechanism, so that the automatic return of the inspected article 80 can be realized while the over-inspection flow of the security inspection machine is stopped, and the normal conveying of the sectional conveying mechanism 20 is resumed, so that the automatically returned inspected article 80 is re-subjected to the radiation scanning. Therefore, the security inspection machine can avoid manual intervention when the radiation scanning of the inspected object 80 fails, thereby being beneficial to improving the degree of automation of the security inspection.

In embodiments of the present application, the processing component 90 may control the delivery of the off-lane entrance transport section 31 and the in-lane transport section 32 of the staging mechanism 30 in the over-detection direction (i.e., forward delivery) to resume synchronously or alternatively, to resume asynchronously. In the process of retracting the inspected article 80, even if other inspected articles waiting for the radiation scanning outside the radiation scanning path 10 are prevented from entering the in-path entrance area s_in from the path entrance 10a by stopping the out-path entrance conveying section 31, the separation distance between the retracted inspected article 80 and the other inspected articles waiting for the radiation scanning outside the radiation scanning path 10 is reduced, resulting in the formation of the inspected article convergence near the path entrance 10 a.

If the out-of-lane entrance conveyor section 31 and in-lane conveyor section 32 of the segmented conveyor mechanism 30 are controlled to resume conveyance in the overscan direction (i.e., forward conveyance) in response to the overscan items 80 being retracted in the retraction direction to the in-lane entrance area s_in of the radiation scanning tunnel 10, then after the conveyance in the overscan direction is resumed, the overscan items 80 and other overscan items waiting for radiation scanning outside the radiation scanning tunnel 10 may be conveyed in a converged state (i.e., with a smaller spacing in the tunnel extension direction X), in which case a single item-spacing overscan be maintained for a predetermined spacing between a plurality of overscan items, i.e., the radiation scanning assembly 20 may be configured to activate only the overscan item 80 in place in the radiation scanning area s_scan as described above, possibly resulting in the radiation scanning assembly 20 continually scanning both overscan items such that the resulting scanned image based on the radiation scanning data generated during one activation of the radiation scanning assembly 20 is a composite image containing both overscan not be visually presented with a single item-alone, thereby making it difficult to visually identify an item with a single overscan be scanned.

Thus, in the embodiment of the present application, it is preferable that, in response to the overstocked article 80 being retracted in the retraction direction to the in-lane entrance area s_in of the radiation scanning tunnel 10, the control of the off-lane entrance conveyor section 31 and the in-lane conveyor section 32 of the segmented conveyor mechanism 30 asynchronously resumes conveyance in the overstocked direction (i.e., forward conveyance), i.e., the in-lane conveyor section 32 resumes conveyance in the overstocked direction (i.e., forward conveyance), the resumption of conveyance in the overstocked direction (i.e., forward conveyance) of the off-lane entrance conveyor section 31 can be delayed so that, when the overstocked article convergence due to retraction occurs near the tunnel entrance 10a, a separation distance sufficient to cause the radiation scanning assembly 20 to produce an on-off can be formed between the overstocked article 80 and other overstocked articles awaiting radiation scanning outside the radiation scanning tunnel 10.

Fig. 3 is a schematic state switching diagram of a segmented conveying mechanism of a security inspection machine in an embodiment of the application. Referring to fig. 3, the reference numeral "85" in fig. 3 indicates other inspected articles waiting for radiation scanning outside the radiation scanning channel 10, and, in order to resume the conveying of the in-lane conveying section 32 in the over-inspection direction (i.e., forward conveying), the conveying of the out-of-lane entrance conveying section 31 in the over-inspection direction (i.e., forward conveying) may be delayed, the processing assembly 90 may be specifically configured to:

In response to the retraction of the inspected article 80 in the retraction direction into position at the in-lane entrance area s_in, control the in-lane conveying section 32 to resume conveyance in the inspection direction;

in response to the inspected article 80 being conveyed again in the inspection direction to the in-lane exit area after retraction (i.e., again through the radiation scanning area S _ scan), the off-lane entrance conveyor section 31 is controlled to resume conveyance in the inspection direction.

In embodiments of the present application, for whether the inspected article 80 is retracted in place in the in-lane entrance area s_in in the retraction direction, the processing component 90 may perform a position prediction for the inspected article 80 based on identifying the determined conveyance position of the inspected article 80 before retraction and the conveyance rate of the in-lane conveyance section 32 in the retraction direction in the first visible image, and may determine whether the inspected article 80 is retracted in place in the in-lane entrance area s_in in the retraction direction based on the position prediction result.

Or, as an alternative, in an embodiment of the present application, the security inspection machine may further comprise a second camera assembly 60, the second camera assembly 60 may be disposed within the radiation scanning tunnel 10, the imaging field of view of the second camera assembly 60 may cover an intra-tunnel entrance area s_in in the radiation scanning tunnel 10, and the second camera assembly 60 is configured to continuously generate a second sequence of visible light images while the security inspection machine is in operation. For example, the second image pickup assembly 60 may include an optical lens, and a visible light-sensitive element such as a CCD or CMOS, and the second image pickup assembly 60 may be IPC. The visible light image acquired by the second camera assembly 60 may also be used to determine the location of movement of the inspected article within the aisle.

In this case, the processing component 90 may also be configured to: based on the second visible light image generated by the second camera assembly 60, it is detected whether the retraction of the inspected article 80 into the in-lane entrance area is in place, for example, by a target recognition result of the inspected article 80 in the second visible light image, and the second visible light image may be a single frame acquisition image in which the inspected article 80 is successfully recognized for the first time in the second visible light image sequence and acquired from the first visible light image sequence.

If the security inspection machine further comprises a second camera assembly 60, the processing assembly 90 may also trigger a segmented adjustment of the transfer rate of the segmented transfer mechanism 30 based on the second visible light image, i.e. the processing assembly 90 may also be configured to perform a segmented adjustment of the transfer rate of the segmented transfer mechanism 30 based on the second visible light image generated by the second camera assembly 60 and the system response time of the radiation scanning assembly 20.

In order to better understand the effectiveness of the radiation scanning performed by the inspected article 80 in the radiation scanning area s_scan, the embodiments of the present application will be hereinafter exemplified in connection with specific examples, and in the specific examples described below, the effectiveness of the radiation scanning performed by the inspected article 80 in the radiation scanning area s_scan is determined taking as an example whether the inspected object 80 belongs to an intensified detection object that needs to be subjected to the re-inspection or a missing detection object that is missing to perform the radiation scanning.

In particular, the processing component 90 may be specifically configured to:

detecting whether the inspected article 80 conveyed in the over-inspection direction to the in-lane exit area s_out of the radiation scanning path 10 belongs to an intensified detection object to be subjected to re-inspection or a missed detection object to which the radiation scanning is missed, based on the first visible light image generated by the first image pickup assembly 50;

if it is determined that the inspected article 80 belonging to the intensified detection object has not been re-inspected or it is determined that the inspected article 80 belongs to the missing detection object, it is determined that the radiation scanning of the inspected article 80 currently reaching the in-lane exit area s_out in the radiation scanning area s_scan is invalid, that is, a detection result is generated that the radiation scanning of the inspected article 80 currently reaching the in-lane exit area s_out in the radiation scanning area s_scan is invalid.

In embodiments of the present application, for the determination of whether the inspected article 80 belongs to an enhanced inspection object that requires a review to be performed, the processing component 90 may be specifically configured to:

determining an image quality of a scanned image of the inspected article 80 conveyed in the over-inspection direction to the in-lane exit area s_out of the radiation scanning channel 10 and/or determining an object profile feature of the inspected article 80 conveyed in the over-inspection direction to the in-lane exit area s_out of the radiation scanning channel 10 based on the first visible light image produced by the first imaging assembly 50;

Based on the image quality of the scanned image of the inspected article 80 and/or the object appearance characteristic of the inspected article 80, it is detected whether the inspected article 80 conveyed in the over-inspection direction to the in-lane exit area s_out of the radiation scanning path 10 belongs to an enhanced detection object.

In embodiments of the present application, if the image quality of the scanned image is below a preset quality threshold level, it may be determined that the inspected article 80 cannot be effectively scanned by the transmitted radiation generated by the radiation scanning assembly 20 (i.e., the radiation source 21) at the default dose.

In embodiments of the present application, the object profile features of the inspected article 80 may include:

the object size characteristic of the inspected article 80, the object size characteristic of the inspected article 80 may be used to indicate a thickness dimension of the inspected article 80 in a beam emitting direction of the transmitted radiation, where the beam emitting direction of the transmitted radiation may refer to a beam axis direction of the transmitted radiation, and if the thickness dimension of the inspected article 80 is greater than a preset width threshold, it may be determined that the inspected article 80 cannot be effectively scanned by the transmitted radiation generated by the radiation scanning assembly 20 (i.e., the radiation source 21) with a default dose; for example, if the radiation scanning assembly 20 employs a transmissive scanning arrangement, it may be determined that the inspected article 80 is not completely penetrated by the transmitted radiation generated by the radiation scanning assembly 20 (i.e., the radiation source 21) at the default dose; for another example, if the radiation scanning assembly 20 is arranged in a back-scattering scanning manner, it may be determined that the back-scattering of the transmitted radiation generated by the radiation scanning assembly 20 (i.e., the radiation source 21) at the default dose can only occur in the portion of the inspected article 80 adjacent to the radiation source 21 and the side of the detector 22, i.e., the effective range of the back-scattering inside the inspected article 80 cannot cover all of the interior materials of the inspected article 80; thus, the inspected article 80 may be determined to be an intensified test object, the preset width threshold may be associated with a maximum attenuation thickness of transmitted radiation having a first dose, and the first dose may be a default dose that produces transmitted radiation for the radiation scanning assembly 20 (i.e., the radiation source 21);

And/or the number of the groups of groups,

object profile features of the inspected article 80, the object profile features of the inspected article 80 may be used to characterize an outer profile shape of the inspected article 80, and if the object profile features of the inspected article 80 match a sample shape that is used to characterize an outer profile shape of a dangerous article, e.g., the inspected article 80 is an article package and the overall outer profile shape or local outer profile shape of the article package matches a cutter shape classified as a dangerous article, then it may be determined that the inspected article 80 is suspected of carrying a dangerous article, and thus, the inspected article 80 may be determined to belong to an enhanced inspection object;

and/or the number of the groups of groups,

the object identification feature of the inspected article 80 may be used to characterize the package identification content of the inspected article 80, and if the object identification feature matches the sample identification used to characterize the package identification content of the hazardous article, for example, an alarm tag indicating inflammable and explosive may be attached to the outer package of the inspected article 80, and the alarm tag matches the identification content of the inflammable and explosive classified as the hazardous article, then it may be determined that the inspected article 80 is suspected of carrying the hazardous article, and thus, the inspected article 80 may be determined to belong to the enhanced inspection object.

In the embodiment of the present application, in the case where the inspected article 80 belongs to the reinforced inspection object to be subjected to the re-inspection, in addition to the first retraction and the re-inspection of the inspected article 80 by the sectional control of the sectional conveying mechanism 30, the radiation dose of the transmitted radiation used by the radiation scanning assembly 20 may be raised during the re-inspection.

Fig. 4 is a schematic diagram of a first working example of the security inspection machine in the embodiment of the present application. Referring to fig. 4, in which the luggage case with the inspected article 80 having a thickness dimension greater than the preset width threshold is illustrated in fig. 4, in the embodiment of the present application, the processing component 90 may configure the radiation scanning component 20 (i.e. the radiation source 21) to generate the transmission radiation with the first dose as the default dose, and the transmission radiation of the first dose is insufficient to completely penetrate the inspected article 80, so that the internal structural features of all the positions of the inspected article 80 cannot be completely reflected in the scan image generated based on the radiation scan data generated by the radiation scanning component 20 (i.e. the detector 22). Thus, still referring to fig. 4, the processing assembly 90 may also be used to: during the radiation scanning performed for the review by reentering the radiation scanning area S _ scan after the retraction of the inspected article 80, the radiation scanning assembly 20 (i.e. the radiation source 21) is controlled to generate transmission radiation at a second dose higher than the first dose using the second configuration parameter Conf _ dose 2.

As also previously described, the scan image of each inspected article 80 may be generated based on the radiation scan data generated by the radiation scan assembly 20 during the transit of the inspected article 80 through the radiation scan region s_scan, and the radiation scan assembly 20 is triggered to activate during the transit of the inspected article 80 through the radiation scan region s_scan due to the successful sensing of the in-place condition of the inspected article 80 in the radiation scan region s_scan. Therefore, if the on-bit status of the inspected article 80 during the pass through the radiation scanning area s_scan is not successfully sensed, or if the activation of the radiation scanning assembly 20 by the inspected article 80 during the pass through the radiation scanning area s_scan fails, the inspected article 80 will be missed to perform the radiation scanning and the scanned image will be missing.

Thus, in embodiments of the present application, for a determination of whether the inspected article 80 belongs to a missed detection object for which a ray scan was missed, the processing component 90 may be specifically configured to:

based on the result of the matching of the first visible light image and the generated scan image, which is generated based on the radiation scan data generated by the radiation scan assembly 20 as described above, it is detected whether the inspected article 80 belongs to a missing detection object of the missing scan image.

In embodiments of the present application, the matching of the first visible light image with the generated scanned image by the processing component 90 may employ targeting the first visible light image with the generated scanned image for the inspected article 80, wherein the generated scanned image targeting the first visible light image may be a generated scanned image within a selected time window at the image generation time by rewinding forward a preset time period from the ray scan region s_scan to the in-lane exit region s_out based on the current transfer rate of the in-lane transfer section 32 with the generation time of the first visible light image as a reference time period for characterizing a predicted time period for the inspected article 80 to transfer from the ray scan region s_scan to the in-lane exit region s_out. If a matching target for characterizing the inspected article 80 is identified in both the first visible image and any scanned image, it may be determined that the inspected article 80 does not belong to a missing detection object; however, if none of the generated scan images (e.g., generated scan images whose image generation times lie within the selected time window) match the same target object as the inspected article 80 appearing in the first visible light image, it may be determined that the inspected article 80 belongs to a missing detection object of the missing scan image.

In an embodiment of the present application, as an alternative, the matching of the first visible light image with the generated scanned image by the processing component 90 may be based on the image number relationship of the first visible light image with the generated scanned image. Specifically, as previously described, the radiation scanning assembly 20 may be activated in response to sensing the presence of the inspected article 80 in the radiation scanning region s_scan and deactivated in response to the absence of the presence of the inspected article in the radiation scanning region s_scan, such that radiation scanning data generated by the radiation scanning assembly 20 during each activation is used to generate a frame of scanned image corresponding to the inspected article 80 routed through the radiation scanning region s_scan, in which case, if the first visible light image is a single frame of acquired image obtained from a first sequence of visible light images generated by the first imaging assembly 50, and the single frame of acquired image is generated in response to successful identification of each inspected article 80 in the first sequence of visible light images that has been through the radiation scanning region s_scan, the cumulative number of images of the first visible light image (i.e., single frame of acquired image) may be updated to be the same as the current cumulative number of images of scanned images each time the first visible light image was acquired (i.e., single frame of acquired image). Even if there is an extreme case where two inspected articles are concurrently conveyed in the posture of being abutted against each other in the lane extending direction X and the lane width direction Y, the two inspected articles abutted against each other may be paid out of the generation of the one-time scanned image and may be regarded as one inspected article 80 in the first visible light image and the second visible light image by the object recognition, and thus the extreme case satisfies the update tendency that the image accumulation number of the first visible light image (i.e., the single frame captured image) and the image accumulation number of the scanned image tend to be the same.

Based on such rules, the processing component 90 may be specifically configured to:

determining whether the inspected article 80 belongs to the missing detection object based on the image number relationship of the first visible light image and the scanned image;

if the current first visible light image causes the image accumulation number of the first visible light image to be greater than the image accumulation number of the scanning image, the inspected article 80 appearing in the current visible light image is determined as the missing detection object.

Fig. 5 is a schematic diagram of a second working example of the security inspection machine in the embodiment of the present application. Referring to fig. 5, in fig. 5, the inspected article 80 is illustrated as a sheet-like package such as an envelope, and since the inspected article 80 laid on the segmented conveying mechanism 30 is always lower than the deployment height of the photo sensor device 40 during the conveying process, and the inspected article 80 is too light to generate enough pressure on the pressure sensor device 45, the sensing signals generated by the photo sensor device 40 and the pressure sensor device 45 are all Invalid signals indicating that the radiation scanning area fscan is not in place, and the Invalid signal is indicated by "Invalid" in fig. 5. That is, in the working example shown in fig. 5, the missing scanned image is caused by the failure of the sensing of the inspected article 80 at the radiation scanning area s_scan. In this case, the processing component 90 may also be configured to: the radiation scanning assembly 20 is controlled to maintain an enabled state for performing radiation scanning during a period in which the radiation scanning area s_scan is re-entered to perform the supplementary inspection after the over-inspected article 80 determined to belong to the missing detection object is retracted.

Fig. 6 is an exemplary flowchart of a control method for a security inspection machine in an embodiment of the present application. Referring to fig. 6, in an embodiment of the present application, there is further provided a control method for a security inspection machine, where the security inspection machine may include the structure described in the foregoing embodiment, and the control method for the security inspection machine may include:

s610: the method may further include detecting a validity of the radiation scan of the inspected article in the radiation scan area, the validity of the radiation scan performed by the inspected article being determined based on radiation scan data generated by the radiation scan assembly and/or the first visible light image generated by the first camera assembly, the radiation scan being carried out by the inspected article in the inspection direction.

Wherein the evaluation index for detecting the validity of the radiation scan based on the radiation scan data may include an image quality of a scan image generated using the radiation scan data; the first visible light image may be one frame of visible light image of the inspected object in the first visible light image sequence generated by the first camera component, for example, the first visible light image may be a single frame of acquired image obtained by successfully identifying the inspected object in the first visible light image sequence for the first time and acquiring the inspected object from the first visible light image sequence.

S630: and in response to a detection result that the ray scanning of the inspected article currently reaching the in-lane exit area is invalid in the ray scanning area, controlling the off-lane entrance conveying section of the segmented conveying mechanism to stop and controlling the in-lane conveying section to switch to convey the inspected article in a retreating direction opposite to the over-inspection direction.

Wherein during a period in which the in-lane conveying section of the segmented conveying mechanism reversely conveys the inspected article in the retracting direction, the conveying of the out-of-lane outlet conveying section of the segmented conveying mechanism in the over-inspection direction may be allowed or the out-of-lane outlet conveying section of the segmented conveying mechanism may also be controlled to stop, and the radiation scanning assembly may be further configured to be turned off during the conveying of the in-lane conveying section in the retracting direction.

S650: in response to the inspected article retracting in the retraction direction to the in-lane entrance area of the radiation scanning channel, the out-of-lane entrance transport section and the in-lane transport section of the segmented transport mechanism are controlled to resume transport in the over-inspection direction.

Based on the above-mentioned flow, whenever there is an inspected article that fails to be executed with effective ray scanning in the ray scanning channel, the off-road entrance conveying section is stopped and the in-road conveying section is retracted by the segment control of the segment conveying mechanism, so as to realize the automatic retraction of the inspected article while stopping the over-inspection flow of the security inspection machine, and then the normal conveying of the segment conveying mechanism is resumed to make the automatically retracted inspected article re-executed with ray scanning. Therefore, the security inspection machine can avoid manual intervention when the condition of scanning and invalidating rays of the inspected articles occurs, and further is beneficial to improving the degree of automation of security inspection.

In the embodiment of the present application, the control manner of S650 in the flow shown in fig. 6 may be: the transfer of the off-track entrance transfer section and the in-track transfer section of the control section transfer mechanism in the oversee direction is resumed synchronously, or alternatively, may be resumed asynchronously. In order to facilitate that when the passing inspected articles gather near the entrance of the channel due to the rollback, a spacing distance enough to trigger the radiation scanning assembly to turn on and off once can be formed between the returned passing inspected articles and other passing inspected articles waiting for the radiation scanning outside the radiation scanning channel, in an embodiment of the present application, preferably, the control manner of S650 in the flow shown in fig. 6 is preferably asynchronous recovery, that is, the recovery of the conveying section in the passing direction may be delayed from the recovery of the conveying section of the entrance outside the channel in the passing direction.

Fig. 7 is a schematic flow chart of a control method for a security inspection machine according to an embodiment of the present application. Referring to fig. 7, in the embodiment of the present application, S650 in the flow shown in fig. 6 may specifically include, when a mode of controlling the asynchronous recovery of the transmission of the out-of-track entry transmission segment and the in-track transmission segment of the segmented transmission mechanism in the over-detection direction is selected:

S651: responsive to the retraction of the inspected article in the retraction direction into position at the in-lane entrance area, controlling the in-lane conveying section to resume conveyance in the inspection direction;

s653: in response to the inspected article being conveyed again in the inspection direction past the radiation scanning region and to the in-lane exit region after retraction, the off-lane entrance conveyor section is controlled to resume conveyance in the inspection direction.

In the embodiment of the present application, S610 in the flow shown in fig. 6 may determine the validity of the ray scanning performed on the inspected object in the ray scanning area by detecting whether the inspected object belongs to the intensified detection object requiring to be subjected to the re-inspection or the missed detection object on which the ray scanning is missed, that is, S610 in the flow shown in fig. 6 may specifically include:

detecting whether an overstocked article conveyed in an overstock direction to an in-lane exit area of a ray scanning channel belongs to an intensified detection object to be subjected to retest or a missed detection object from which ray scanning is missed, based on a first visible light image generated by a first camera assembly;

if it is determined that the inspected article belonging to the intensified detection object has not been subjected to the re-inspection or that the inspected article belongs to the missing detection object, it is determined that the ray scanning of the inspected article currently reaching the in-lane exit area in the ray scanning area is invalid, that is, a detection result that the ray scanning of the inspected article currently reaching the in-lane exit area in the ray scanning area is invalid is generated.

Fig. 8 is a flowchart of a first example of a control method for a security inspection machine according to an embodiment of the present application. As shown in fig. 8, in the embodiment of the present application, if it is required to detect whether the inspected article belongs to the reinforced detection object that needs to be subjected to the re-inspection, S610 in the flow shown in fig. 6 may specifically include the following steps:

s611: determining an image quality of a scan image generated based on the radiation scan data generated by the radiation scan assembly and/or determining an object profile feature of the inspected article conveyed in the over-inspection direction to the in-lane exit region of the radiation scan channel based on the first visible light image generated by the first camera assembly;

s613: detecting whether the inspected article conveyed in the over-inspection direction to the in-lane exit area of the radiation scanning channel belongs to an enhanced detection object based on the image quality of the scanned image of the inspected article and/or the object appearance characteristic of the inspected article, wherein the detection criteria based on the image quality and the object appearance characteristic may be referred to in the foregoing description and will not be repeated here;

s615: and responding to the detection result that the overstocked articles which are conveyed along the overstock direction and reach the in-channel outlet area of the ray scanning channel belong to the reinforced detection object, and determining that the ray scanning of the overstocked articles which currently reach the in-channel outlet area in the ray scanning area is invalid.

In the embodiments of the present application, the object appearance features of the inspected article may refer to the descriptions in the foregoing embodiments, and will not be described herein. In addition, in the embodiment of the application, in the case that the inspected article belongs to the reinforced detection object to be subjected to the re-inspection, besides the first retraction and the re-inspection of the inspected article are performed by the sectional control of the sectional conveying mechanism, the radiation dose of the transmission radiation used by the radiation scanning assembly can be increased during the re-inspection period. In this case, still referring to fig. 8, after S630 of the flow shown in fig. 6 (or after S651 of the flow shown in fig. 7), the control method may further include:

s670: during the period when the radiation scanning area is re-entered after the over-inspected article is retracted and the radiation scanning for re-inspection is performed, the radiation scanning assembly is controlled to generate transmission radiation at a second dose higher than the first dose.

Fig. 9 is a flowchart of a second example of a control method for a security inspection machine according to an embodiment of the present application. As shown in fig. 9, in the embodiment of the present application, if it is required to detect whether the inspected article belongs to the missing detection object for which the ray scanning is missing, S610 in the flow shown in fig. 6 may specifically include the following steps:

S617: detecting whether the inspected object belongs to a missing detection object of a missing scanning image or not based on a matching result of the first visible light image and the generated scanning image, wherein the scanning image is generated based on radiation scanning data generated by a radiation scanning component;

s619: in response to a detection result that the overstocked article conveyed in the overstock direction to the in-lane exit area of the radiation scanning channel belongs to the missing detection object, it is determined that the radiation scanning of the overstocked article currently reaching the in-lane exit area is invalid in the radiation scanning area.

In the embodiment of the present application, the matching of the first visible light image with the generated scan image in S617 may be performed by performing target matching of the first visible light image with the generated scan image with the inspected article 80 as a target, or may be based on the image number relationship between the first visible light image and the generated scan image. Specifically, as described above, in matching according to the image number relationship, S619 may specifically include: and determining whether the inspected object belongs to the missing detection object based on the image quantity relation between the first visible light image and the scanning image, wherein if the current first visible light image causes the image accumulation quantity of the first visible light image to be larger than that of the scanning image, the inspected object appearing in the current visible light image is determined to be the missing detection object.

Moreover, in an embodiment of the present application, in a case where the missing scanned image of the inspected object is caused by the induction failure of the inspected object in the radiation scanning area, still referring to fig. 9, after S630 of the flow shown in fig. 6 (or after S651 of the flow shown in fig. 7), the control method may further include:

s675: the radiation scanning assembly is controlled to maintain an enabled state for performing radiation scanning during a period in which the re-entry of the inspected article determined to belong to the missing detection object into the radiation scanning area is performed for the complementary detection.

In an embodiment of the present application, a step for fallback positioning may be further included between S630 and S650 in the flow shown in fig. 6. For example, as described earlier, for whether the inspected article is retracted in the in-lane entrance area in the retraction direction, the position of the inspected article may be predicted based on identifying the determined conveyance position of the inspected article before retraction and the conveyance rate of the in-lane conveyance section in the retraction direction in the first visible image, and whether the inspected article is retracted in the in-lane entrance area in the retraction direction may be determined based on the result of the position prediction; alternatively, if the security inspection machine further includes the second camera assembly described above, the step for rollback positioning may include: based on the second visible light image generated by the second camera assembly, for example, by a target identification result of the inspected object in the second visible light image, whether the rollback of the inspected object to the in-lane entrance area is in place is detected, and the second visible light image may be a single frame acquisition image obtained by successfully identifying the inspected object in the second visible light image sequence for the first time and acquiring the inspected object from the first visible light image sequence.

In addition, while executing the flow shown in fig. 6, the control method for a security inspection machine in the embodiment of the present application may further perform the segment adjustment of the transmission rate of the segment transmission mechanism by referring to the manner of the processing component described above, which is not described herein.

Fig. 10 is an exemplary structural schematic diagram of a control device for a security inspection machine in an embodiment of the present application. Referring to fig. 10, in an embodiment of the present application, there is further provided a control device for a security inspection machine, where the security inspection machine may include the structure described in the foregoing embodiment, and the control method for the security inspection machine may include:

an effectiveness discriminating module 1010, configured to detect effectiveness of radiation scanning of the inspected article in the radiation scanning area by the article conveyed in the over-inspection direction to the in-lane exit area of the radiation scanning channel, where the effectiveness of the radiation scanning performed by the inspected article may be determined based on radiation scanning data generated by the radiation scanning component and/or first visible light image detection generated by the first image capturing component, and an evaluation index for detecting effectiveness of the radiation scanning based on the radiation scanning data may include image quality of a scanned image generated using the radiation scanning data, and the first visible light image may be one of a frame of visible light images of the inspected article in a first visible light image sequence generated by the first image capturing component, for example, the first visible light image may be a single frame of acquired image obtained by successfully identifying the inspected article for the first time in the first visible light image sequence.

A transmission control module 1030 for:

controlling the off-road entrance conveying section of the segmented conveying mechanism to stop and controlling the on-road conveying section to switch to convey the inspected article in a retreating direction opposite to the over-detection direction in response to a detection result that the ray scanning of the inspected article currently reaching the on-road exit region is invalid in the ray scanning region, wherein during a period in which the on-road conveying section of the segmented conveying mechanism reversely conveys the inspected article in the retreating direction, the off-road exit conveying section of the segmented conveying mechanism may be allowed to remain conveyed in the over-detection direction or the off-road exit conveying section of the segmented conveying mechanism may also be controlled to stop, and the ray scanning assembly may be further configured to be turned off during a period in which the on-road conveying section is conveyed in the retreating direction;

in response to the inspected article retracting in the retraction direction to the in-lane entrance area of the radiation scanning channel, the out-of-lane entrance transport section and the in-lane transport section of the segmented transport mechanism are controlled to resume transport in the over-inspection direction.

Based on the control device, when the detected article fails to be effectively scanned in the ray scanning channel, the outside-channel entrance conveying section is stopped and the inside-channel conveying section is retracted by the sectional control of the sectional conveying mechanism, so that the automatic retraction of the detected article is realized while the over-detection flow of the security inspection machine is stopped, and the normal conveying of the sectional conveying mechanism is restored to enable the automatically retracted detected article to be re-scanned. Therefore, the security inspection machine can avoid manual intervention when the condition of ray scanning failure of the inspected object occurs, and further is beneficial to improving the degree of automation of security inspection.

In the embodiment of the present application, for the specific working principle of the effective discriminating module 1010, reference may be made to the foregoing specific description about S610; for a specific operation principle of the transmission control module 1030, reference may be made to the specific description of S630 and S650 hereinbefore; the control device for the security inspection machine may further comprise a scanning control module for controlling the radiation scanning assembly, the specific working principle of which may be seen from the foregoing description of S670 and S675; the control device for a security check machine may also comprise a rollback positioning module, the working principle of which may be seen from the detailed description hereinbefore regarding the steps for rollback positioning.

In the embodiment of the present application, the transmission control module 1030 may further perform the segment adjustment of the transmission rate of the segment transmission mechanism by referring to the manner of the processing component described above, which is not described herein.

Embodiments of the present application also provide a non-transitory computer readable storage medium storing instructions that, when executed by a processor, cause the processor to perform a control method for a security check machine as described in the previous embodiments.

The foregoing description of the preferred embodiments of the present invention is not intended to limit the invention to the precise form disclosed, and any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A security inspection machine, the security inspection machine comprising:

A processing assembly for:

detecting the effectiveness of radiation scanning of the inspected article in the radiation scanning area, wherein the effectiveness of the radiation scanning of the inspected article is detected and determined based on radiation scanning data generated by the radiation scanning assembly and/or first visible light images generated by a first camera assembly; an imaging field of view of the first camera assembly covering the in-lane exit area;

2. The security inspection machine of claim 1, wherein the machine further comprises a controller,

the processing component is specifically configured to:

detecting whether the inspected article belongs to an intensified detection object needing to be subjected to re-inspection or a missed detection object which is missed to perform ray scanning based on the first visible light image;

Wherein if the inspected article belonging to the intensified detection object has not been subjected to the re-inspection or the inspected article is determined to be the missing detection object, determining that the radiation scanning performed by the inspected article is invalid.

3. The security inspection machine of claim 2, wherein the machine further comprises a controller,

the processing component is specifically configured to:

determining an object appearance feature of the inspected article based on the first visible light image;

and detecting whether the inspected object belongs to the reinforced detection object or not based on the object appearance characteristics.

4. A security inspection machine according to claim 3, wherein,

the object appearance feature comprises:

the object size feature of the inspected article is used for representing the thickness size of the inspected article in the beam outgoing direction of the transmitted rays, if the thickness size is larger than a preset width threshold, the inspected article is determined to belong to the reinforced detection object, and the preset width threshold is related to the maximum attenuation thickness of the transmitted rays with a first dose;

and/or the number of the groups of groups,

the object profile feature of the inspected article is used for representing the outer profile shape of the inspected article, and if the object profile feature is matched with the sample shape used for representing the outer profile shape of the dangerous article, the inspected article is determined to belong to the reinforced detection object;

And/or the number of the groups of groups,

the object identification feature of the inspected article is used for representing the package identification content of the inspected article, and if the object identification feature is matched with the sample identification used for representing the package identification content of the dangerous article, the inspected article is determined to belong to the reinforced detection object.

5. A security inspection machine according to claim 3, wherein,

the radiation scanning assembly is configured to generate the transmitted radiation at a first dose as a default dose;

the processing assembly is further configured to:

during a radiation scan performed for the review by re-entering the radiation scan area after the review object is retracted, the radiation scan assembly is controlled to generate the transmitted radiation at a second dose higher than the first dose.

6. The security inspection machine of claim 2, wherein the machine further comprises a controller,

the processing component is specifically configured to:

and detecting whether the inspected object belongs to the missing detection object missing the scanning image or not based on a matching result of the first visible light image and the generated scanning image, wherein the scanning image is generated based on ray scanning data generated by the ray scanning assembly.

7. The security inspection machine of claim 6, wherein the machine further comprises a machine frame,

the radiation scanning assembly is configured to: in response to sensing an in-situ condition of the inspected article in the radiation scanning area, in response to the inspected article disappearing in-situ condition in the radiation scanning area, and during conveyance of the in-lane conveying section in the retraction direction;

the radiation scanning data generated by the radiation scanning assembly during each start is used for generating a frame of the scanning image, the first visible light image is a single-frame acquisition image acquired from a first visible light image sequence generated by the first camera assembly, and the single-frame acquisition image is acquired from the first visible light image sequence in response to successful identification of each inspected object in the first visible light image sequence;

the processing component is specifically configured to:

determining whether the inspected article belongs to the omission detection object based on the image quantity relation of the first visible light image and the scanning image;

and if the current first visible light image causes the image accumulation number of the first visible light image to be larger than the image accumulation number of the scanning image, determining the inspected object appearing in the current visible light image as the missing detection object.

8. The security inspection machine of claim 6, wherein the machine further comprises a machine frame,

the absence of the scanned image is caused by the induction failure of the inspected object in the ray scanning area;

the processing assembly is further configured to:

and controlling the ray scanning assembly to maintain an enabled state for executing ray scanning during the period that the inspected article is retracted and re-enters the ray scanning area to be subjected to the supplementary inspection.

9. The security inspection machine of claim 1, wherein the machine further comprises a controller,

the security inspection machine further comprises:

a second camera assembly, an imaging field of view of the second camera assembly covering the in-lane entrance area;

the processing assembly is further configured to:

detecting whether the retraction of the inspected object to the in-lane entrance area is in place or not based on a second visible light image generated by the second camera assembly;

And/or the number of the groups of groups,

and carrying out the sectional adjustment of the transmission rate of the sectional transmission mechanism based on the second visible light image generated by the second camera shooting assembly and the system response time of the ray scanning assembly.

10. The security inspection machine of claim 1, wherein the machine further comprises a controller,

the processing component is specifically configured to: controlling the in-lane conveying section to resume conveyance in the overscan direction in response to the overscan item being retracted in place in the in-lane entrance area in the retraction direction; and controlling the off-lane entrance conveyor section to resume conveyance in the overseeing direction in response to the overseeed article being conveyed again in the overseeing direction to the in-lane exit area after rollback;

and/or the number of the groups of groups,

the security inspection machine further comprises a pressure sensing device arranged at the segmented conveying mechanism, and the processing assembly is further configured to: based on the sensing result of the pressure sensing device and the system response time of the ray scanning assembly, carrying out the sectional adjustment of the transmission rate of the sectional transmission mechanism;

and/or the number of the groups of groups,

the in-track conveying section comprises an in-track scanning conveying section passing through the ray scanning area, an in-track entrance conveying section continuously arranged between the channel entrance and the in-track scanning conveying section, and an in-track exit conveying section continuously arranged between the in-track scanning conveying section and the channel exit;

And/or the number of the groups of groups,

the segmented transport mechanism further includes an off-road exit transport segment adjacent the channel exit outside the radiation scanning channel.

11. A control method for a security inspection machine, characterized in that the security inspection machine includes a radiation scanning path having a path entrance and a path exit in an overscan direction, a radiation scanning assembly including an intra-path entrance region, a radiation scanning region, and an intra-path exit region arranged in order from the path entrance to the path exit in the overscan direction, a segmented conveyance mechanism including an extra-path entrance conveyance section adjoining the path entrance outside the radiation scanning path, and an intra-path conveyance section continuously disposed between the path entrance and the path exit in the radiation scanning path, the radiation scanning assembly being arranged in the radiation scanning path to radiation scan an overscan item conveyed by the segmented conveyance mechanism to the radiation scanning region with transmission radiation, and the control method comprising:

12. A control apparatus for a security inspection machine, the security inspection machine comprising a radiation scanning tunnel having a tunnel entrance and a tunnel exit in an over-inspection direction, a radiation scanning assembly, a segmented transport mechanism, and a first camera assembly, the radiation scanning tunnel further comprising an in-tunnel entrance region, a radiation scanning region, and an in-tunnel exit region arranged sequentially from the tunnel entrance to the tunnel exit in the over-inspection direction, the segmented transport mechanism comprising an out-of-tunnel entrance transport section adjacent to the tunnel entrance outside the radiation scanning tunnel, and an in-tunnel transport section continuously disposed in the radiation scanning tunnel between the tunnel entrance and the tunnel exit, the radiation scanning assembly being arranged in the radiation scanning tunnel to radiation scan inspected articles transported by the segmented transport mechanism to the radiation scanning region, and the control apparatus comprising:

a transmission control module for:

13. A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the control method of claim 11.