JP2021071324A - Inspection system - Google Patents

Abstract

To provide an inspection system that does not pose a psychological anxiety on the holder of a baggage when the holder views a camera for inspection.SOLUTION: An inspection device 30 is configured to photograph a transmission image formed by transmitting light through a conveyed baggage 2. A hood 40 is a member for covering the conveyance path of the baggage 2 and is provided in order to prevent a hand of a baggage owner 3 from entering a photographing area B4 where electromagnetic waves fly about. A camera 50 photographs an external-view image that shows the external view of the baggage 2 conveyed by a first conveyance device 10. A baggage inspection system 1 conveys the baggage 2 under control of a control device 60 and photographs the transmission and external-view images of the baggage 2 being conveyed, and causes a display 70 which is display means to simultaneously display the photographed external-view images of the transmitted baggage.SELECTED DRAWING: Figure 1

Description

The present invention relates to a technique for inspecting an object to be inspected.

As a technique for inspecting an object to be inspected, Patent Document 1 provides efficient baggage inspection by moving a baggage floor board that moves in a baggage lane and a person's floor board that moves in a person's lane at substantially the same speed. The technology to be performed is disclosed.

Japanese Unexamined Patent Publication No. 2019-11981

In the baggage inspection device conventionally used at airports and the like, a plurality of staff members are assigned to transport the baggage at a low speed and carry out a time-consuming inspection. On the other hand, the targets of terrorist attacks are diversifying to event venues, transportation facilities, office buildings, hotels, etc., and even if it is not airport-level security, it improves safety while maintaining throughput close to the current level, and is convenient. The need for high security is increasing.

In baggage inspection equipment for event venues, the installation space is limited, and it is often difficult to assign multiple staff members as in airports. Therefore, in order to perform baggage inspection with high throughput, an inspection device that can be handled by a small number of inspectors is required. However, the conventional baggage inspection device requires a person who operates the device, a person who looks at the screen, a person who receives the user's baggage and puts it in the inspection device, a person who receives the inspected baggage and hands it to the user, and the like. There was a problem that a small number of inspectors could not handle it.

In order to handle with a small number of inspectors, it is necessary to improve the efficiency of inspections. For example, if the inspection device detects a dangerous substance in the baggage, the inspector will perform a secondary inspection, but at that time, if it takes time to search for the baggage in which the dangerous substance is detected, it will take more time. It will be wasted. For example, if a camera for photographing the appearance of the luggage is provided in order to eliminate the waste, the owner of the luggage may feel uneasy.
In view of the above background, it is an object of the present invention to prevent the owner of the luggage from being psychologically anxious due to seeing the camera.

In order to solve the above-mentioned problems, the present invention is an inspection system that inspects a load transported by a continuously operating belt conveyor with an inspection device, and obtains an external image of the load on the entrance side of the inspection device. The first aspect is to provide an inspection system in which the camera for photographing is arranged at a position visually shielded from the lane side through which the owner of the luggage passes.

According to the inspection system of the first aspect, it is possible to prevent the owner of the luggage from being psychologically anxious due to seeing the camera.

In the inspection system of the first aspect, the configuration in which the camera captures the external appearance image through a transparent antireflection member provided on the transparent hood arranged on the entrance side of the inspection device is adopted as the second aspect. May be done.

According to the inspection system of the second aspect, it is possible to reduce the possibility that the camera is reflected in the transparent hood and causes psychological anxiety to the owner of the luggage.

In the inspection system of the second aspect described above, a configuration in which the transparent antireflection member is provided on either or both of the upper surface and the back upper surface of the transparent hood may be adopted as the third aspect. ..

According to the inspection system of the third aspect, the reflection of the camera arranged above the transparent hood can be suppressed.

In the inspection system of the second aspect, the fourth aspect is that the transparent antireflection member is provided on either or both of the front surface and the back surface of the transparent hood hanging in the shooting direction of the camera. May be adopted as.

According to the inspection system of the fourth aspect, it is possible to suppress the reflection of the camera on the transparent hood regardless of the position of the camera.

The figure which shows the appearance of the baggage inspection system which concerns on embodiment Enlarged view of the periphery of the camera The figure which shows an example of the displayed transparent image and appearance image Enlarged view of the periphery of the modified example camera

[1] Example FIG. 1 shows the appearance of the cargo inspection system 1 according to the embodiment. The baggage inspection system 1 is a system that uses an inspection device to inspect whether or not items such as knives that are prohibited from being brought in (prohibited items) are included in the baggage of visitors at an event venue, for example. The baggage inspection system 1 is an example of the "inspection system" of the present invention. FIG. 1 shows an example in which the luggage 2 is subject to inspection.

The baggage inspection system 1 is used by the owner 3 of the baggage 2 and the inspector 4 who performs work related to the inspection. A plurality of baggage inspection systems 1 may be installed depending on the size of the entrance, but in this embodiment, only one inspector 4 is assigned to each baggage inspection system 1, so-called one operation. Is being implemented. FIG. 1A shows the baggage inspection system 1 viewed from above vertically, and FIG. 1B shows the baggage inspection system 1 viewed from the horizontal direction.

The cargo inspection system 1 includes a first transport device 10, a second transport device 20, an inspection device 30, a hood 40, a camera 50, a control device 60, and a display 70. Both the first transport device 10 and the second transport device 20 are belt conveyors that transport the load 2 in the transport direction A1. That is, the luggage 2 is conveyed by a belt conveyor that operates continuously. The first transfer device 10 and the second transfer device 20 are arranged side by side in the transfer direction A1 to form a transfer path B1.

In the baggage inspection system 1, an inspector 4 is arranged on either the left or right side of the transport path B1, and an inspection lane B2 through which the owner 3 of the baggage 2 passes is provided on the opposite side of the inspector 4. .. The first transport device 10 is arranged on the upstream side of the second transport device 20, and is provided with a storage place B3 for the owner 3 to place the luggage 2. A hood 40 and an inspection device 30 are installed on the downstream side of the hood 40 at the end of the transport path B1 where the luggage placed in the storage place B3 is transported.

The inspection device 30 is a device that captures a transmitted image through which the transported inspection object is transmitted. A transparent image is an image used for inspection of luggage. For example, the inspection device 30 irradiates the baggage 2 passing through the photographing area B4 for taking a transmitted image in the own device with an electromagnetic wave, and displays an image drawn by the light and shade according to the intensity of the electromagnetic wave transmitted through the baggage 2. Generate as a transparent image. The electromagnetic wave emitted by the inspection device 30 to the baggage 2 is an electromagnetic wave in a frequency band that passes through the baggage 2 but has a different transmittance depending on the substance of the contents of the baggage 2, for example, X-rays.

When it is determined in the primary inspection based on the transparent image taken by the inspection device 30 that an object that may be prohibited to be brought in is shown, the inspector 4 opens the baggage 2 and confirms what is actually contained. Perform a secondary inspection. The control device 60 determines the necessity of the secondary inspection based on the captured transparent image. The detailed determination method will be described later.

The hood 40 is arranged on the upstream side in the transport direction A1 with respect to the photographing region B4 of the inspection device 30. The hood 40 is a transparent member that covers the transport path of the luggage 2, and is provided to prevent the hands of the owner 3 from entering the photographing area B4 where electromagnetic waves fly around. The hood 40 is an example of the "transparent hood" of the present invention.

The hood 40 has an upper surface portion 41, a side surface portion 42, and a side surface portion 43. The upper surface portion 41, the side surface portion 42, and the side surface portion 43 each have a quadrangular plate shape. The internal space B5 of the hood 40 having a U-shaped cross section formed by the upper surface portion 41, the side surface portion 42, and the side surface portion 43 in the direction orthogonal to the transport direction A1 is sized so that the luggage 2 can pass through. A camera 50 is provided on the upstream side of the inspection device 30 in the transport direction A1 and vertically above the upper surface portion 41.

FIG. 2 shows an enlarged view of the periphery of the camera 50. The camera 50 captures an external image showing the appearance of the luggage 2 transported by the first transport device 10. The camera 50 is arranged in the internal space 32 of the housing 31 of the inspection device 30, and photographs the external space through the opening 33 that opens vertically downward in the housing 31. The camera 50 captures an external image of the luggage 2 passing through the external space on the entrance side of the inspection device 30.

According to the arrangement shown in FIG. 2, the housing 31 which is a part of the inspection device 30 shields the camera 50 from the person who looks toward the inspection device 30 from the inspection lane B2 side through which the owner 3 of the luggage 2 passes. Acts as a shield (makes it invisible). Strictly speaking, even from the inspection lane B2 side, a part of the camera 50 may be seen by looking into the opening 33 from the vertically lower side, but the entire camera 50 cannot be seen and a part of the camera 50 is always shielded. Further, when viewed from a position higher than the housing 31, the entire camera 50 is shielded.

In this way, the camera 50 is arranged at a position visually shielded from the inspection lane B2 side through which the owner 3 of the luggage 2 passes. When the camera 50 is seen by the owner 3, some people may be worried about what is being photographed. In this embodiment, the camera 50 is shielded by the housing 31 which is a shield as shown in FIG. 2, so that the owner 3 is not given psychological anxiety due to the visibility of the camera 50. ..

The camera 50 photographs the appearance of the luggage 2 passing through the internal space B5 surrounded by the hood 40 through the upper surface portion 41 of the hood 40. Therefore, the upper surface portion 41 is formed of a member that transmits visible light. Further, the upper surface 411 of the upper surface portion 41 facing the camera 50 side is processed to suppress light reflection, and the processing causes light reflection as compared with the case where it is simply processed into a flat surface. It is designed to be suppressed.

The upper surface 411 is, for example, processed to attach an antireflection film. The antireflection film is, for example, a two-layer film, and the light reflected by the two layers is out of phase and cancels each other by interference to suppress reflection. Further, the antireflection film may be a film that scatters light to suppress reflection by providing minute irregularities on the surface, or may be a film having both two layers and irregularities.

The antireflection film is a member that is transparent and has a function of preventing light reflection, and is an example of the "transparent antireflection member" of the present invention. In this way, the camera 50 captures an external image of the luggage 2 through the transparent antireflection member provided on the hood 40 arranged on the entrance side of the inspection device 30.

The transparent antireflection member is not limited to the upper surface 411 of the hood 40, but may be provided not only on the upper surface 412 of the back surface or only on the upper surface 412 of the back surface. By providing the transparent antireflection member at these positions, the reflection of the camera 50 arranged above the hood 40 on the hood 40 is suppressed. Further, by providing the transparent antireflection member, it is possible to improve the sharpness of the image of the luggage photographed through the hood 40.

When the camera 50 is reflected in the hood 40, the owner 3 is made aware of the existence of the camera 50, and as described above, some people may be anxious. In the present embodiment, since this reflection is suppressed, it is possible to make it difficult for the owner 3 of the luggage 2 to notice the existence of the camera 50 and reduce the possibility of causing psychological anxiety to the owner 3.

In the hood 40, the transparent antireflection member may be provided not only on the upper surface portion 41 but also on the side surface portion 42 and the side surface portion 43. Further, a transparent antireflection member may be provided not only on the front surface of the side surface portion 42 and the side surface portion 43 but also on the back surface (the surface on the internal space B5 side). A transparent antireflection member may be provided on any surface by processing the surface itself to have the same structure as the antireflection film, instead of attaching the antireflection film.

As described above, the hood 40 is also provided with a transparent antireflection member on the side surface. As a result, it is possible to prevent the owner of the luggage from being reflected on the transparent hood and making it difficult to see the luggage. When the load 2 transported by the first transport device 10 reaches the downstream end of the transport direction A1 of the first transport device 10, it is subsequently transported by the second transport device 20.

The owner 3 proceeds to the second transport device 20 through the inspection lane B2 provided along the transport path B1 and receives the package 2. The transport speed of the second transport device 20 is slower than the transport speed of the first transport device 10, making it easier for the owner 3 to receive the luggage 2. However, when the above-mentioned secondary inspection is performed, the inspector 4 receives the package 2 before the owner 3.

The method for determining the secondary inspection by the control device 60 described above will be described. The control device 60 is a device that controls the operation of each device included in the cargo inspection system 1. The control device 60 is a computer including a processor such as a CPU (Central Processing Unit), a memory, a storage, a communication unit, and the like. The control device 60 is electrically connected to the first transfer device 10, the second transfer device 20, the inspection device 30, and the display 70 by wiring (not shown).

The control device 60 controls the operation of each device while exchanging data with each electrically connected device. The control device 60 performs an inspection process for inspecting whether or not the baggage 2 contains prohibited items. Specifically, the control device 60 may be prohibited from being brought into the baggage based on the photographing process of causing the inspection device 30 to photograph the baggage passing through the photographing area B4 and the transparent image taken by the photographing process. The inspection process is a determination process for determining whether or not an object is included, that is, whether or not a secondary inspection by the inspector 4 is necessary.

The control device 60 analyzes the shape of the contents contained in the baggage from the captured transparent image by a well-known image analysis method, and whether or not the contents are prohibited from being brought in from the analyzed shape by a method such as pattern matching. To judge. The control device 60 causes the display 70 to display the determination result of the determination process and the transparent image and the appearance image of the luggage 2 as described above.

FIG. 3 shows an example of the displayed transparent image and appearance image. In the example of FIG. 3, the control device 60 causes the display surface 71 of the display 70 to display the transparent image G1 of the luggage 2, the appearance image G2 of the luggage 2, and the determination result C1. The determination result C1 is an image showing the character string "A prohibited item has been detected." In the example of FIG. 3, the knife-shaped contents in the luggage 2 are determined to be prohibited items.

The control device 60 analyzes the image taken by the camera 50 and recognizes an object passing on the transport path B1. Then, the control device 60 sets the camera at a time before the time when the transparent image G1 is taken (hereinafter referred to as “transparent shooting time”) and closest to the transparent shooting time (hereinafter referred to as “appearance shooting time”). It is determined that the object on the transport path B1 photographed by 50 is a baggage in which the transparent image G1 is photographed, and the appearance image G2 of the baggage is associated with the transparent image G1 and displayed at the same time.

As described above, the baggage inspection system 1 captures the transparent image G1 and the external image G2 of the baggage 2 which is being transported by transporting the baggage 2 under the control of the control device 60, and captures the captured transparent images G1 and the external image G2. It is linked to the display 70, which is a display means, and displayed at the same time. As shown in FIG. 1, the display 70 is provided at a position where the photographed baggage 2 can be viewed from the place where the inspector receives the baggage 2.

As described above, when the inspector is at the place where the baggage to be inspected for the secondary inspection is received, if the transparent image G1 shows the prohibited items, the baggage to be inspected for the secondary inspection is carried out only by looking at the display 70. The appearance of the can be known from the appearance image. As described above, according to the present embodiment, it is possible to make it easier to find the inspection object to be inspected secondarily as compared with the case where the transparent image and the appearance image are linked to the same display means and are not displayed at the same time.

The transport path B1 is arranged at a position about the height of a person's waist so that the owner of the luggage can easily place and receive the luggage. Therefore, the inspector also looks down on the luggage from above. In this embodiment, since the camera 50 captures the appearance image of the luggage from the vertically upper side, it is easier for the inspector to identify the actual luggage indicated by the appearance image as compared with the case where the luggage is photographed from the horizontal direction, for example. Can be.

[2] Modification Examples Each of the above-described examples is merely an example of the embodiment of the present invention, and may be modified as follows. Moreover, each Example and each modification may be combined as necessary.

[2-1] Camera Arrangement The arrangement of the cameras for capturing the external image may be different from that of the embodiment.
FIG. 4 shows an enlarged view of the periphery of the camera 50a of this modified example. In FIG. 4, the camera 50a and the like seen from above vertically are shown. The camera 50a captures an external image of the luggage 2 transported by the first transport device 10a.

The camera 50a is arranged in the internal space 32a of the housing 31a of the inspection device 30a. The internal space 32a is provided on the inspection lane B2 side of the housing 31a through which the owner 3 passes. The internal space 32a has an opening 33a that opens on the hood 40a side. The camera 50a photographs the external space through the opening 33a. As described above, the camera 50a is arranged at a position invisible from the inspection lane B2 side through which the owner 3 passes, rather than the camera 50a itself.

Therefore, the camera 50a is invisible to the owner 3 passing through the inspection lane B2. Thereby, as in the embodiment, it is possible to prevent the owner 3 from being given psychological anxiety due to seeing the camera. The camera 50a photographs the appearance of the luggage 2 as viewed from the horizontal direction through the side surface portion 43a of the hood 40a.

In this modification, a transparent antireflection member such as an antireflection film is provided on either or both of the front surface and the back surface of the hood 40a hanging in the photographing direction of the camera 50a. The surface hanging in the photographing direction is a surface located in the photographing direction, and the camera 50a photographs the luggage 2 through the surface. In the example of FIG. 4, the transparent antireflection member is provided on either or both of the front surface 431a and the back surface 432a of the side surface portion 43a of the hood 40a.

As a result, as in the embodiment, it is possible to make it difficult for the owner 3 of the luggage 2 to notice the existence of the camera 50a and reduce the possibility of causing psychological anxiety to the owner 3. Further, by providing the transparent antireflection member on the hood 40a hanging in the shooting direction of the camera 50a, it is possible to suppress the reflection of the camera on the hood 40a regardless of the position of the camera 50a.

[2-2] Shielding In the embodiment, the housing 31 of the inspection device 30 is used as a shielding to shield the camera 50, but the present invention is not limited to this. For example, the camera 50 may be attached to the outside of the housing 31 of the inspection device 30 and a cover serving as a shield for shielding the camera 50 may be provided. Further, the camera 50 may be attached to the hood 40 to provide a similar cover.

In any case, it is sufficient that at least a part of the camera 50 is shielded by a shield from a person who looks at the camera 50 from the inspection lane B2 side. By providing such a shield, it is possible to prevent the owner 3 from being given psychological anxiety due to seeing the camera as in the embodiment. By using a part of the inspection device 30 which is a device for capturing a transparent image as a shield as in the embodiment, the camera cannot be seen more naturally by the owner 3 as compared with the case where the shield is separately provided. Can be done.

[2-3] Luggage inspection location In the example, the case where the luggage inspection is performed at the event venue has been described, but in addition to this, for example, at the entrance of a vehicle such as an airport, a station, a port, or a bus terminal. It may be held at the entrance of facilities such as concert venues, sports stadiums, stadiums and museums. In short, if it is necessary to check the contents of the luggage of the visitors at the entrance for safety, the luggage may be inspected at any place (entrance).

[2-4] One Transfer Device In the embodiment, the number of transfer devices is two, but it may be one. In that case, the transport speed may be constant at all times, and when the number of packages to be inspected is small (for example, when only one package is inspected at one time), the transport speed is increased when the packages pass through the photographing area B4. After the baggage has passed through the photographing area B4, the transport speed may be slowed down.

1 ... Luggage inspection system, 10 ... 1st transport device, 20 ... 2nd transport device, 30 ... Inspection device, 40 ... Hood, 50 ... Camera, 60 ... Control device, 70 ... Display, G1 ... Transparent image, G2 ... Appearance image.

Claims (4)

It is an inspection system that inspects the cargo transported by the continuously operating belt conveyor with an inspection device.
An inspection system in which a camera that captures an external image of the entrance side of the inspection device of the luggage is arranged at a position visually shielded from the lane side through which the owner of the luggage passes. The inspection system according to claim 1, wherein the camera captures an external image of the luggage through a transparent antireflection member provided on a transparent hood arranged on the entrance side of the inspection device. The inspection system according to claim 2, wherein the transparent antireflection member is provided on either or both of the upper surface and the back upper surface of the transparent hood. The inspection system according to claim 2, wherein the transparent antireflection member is provided on either or both of the front surface and the back surface of the transparent hood that hangs in the shooting direction of the camera.

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