JP2023087423A - belongings inspection device - Google Patents

Abstract

To provide a belongings inspection device capable of inspecting belongings of a person to be inspected regardless of whether the person is moving or stationary.SOLUTION: A moving unit 14 is configured to move a movement sensor 1 under control of an information processing device 3. The moving unit 14 has a motor, rotation casters, tires, and the like. The moving unit 14 moves the movement sensor 1 by driving the grounded tire. The moving unit 14 rotates the movement sensor 1 about an axis parallel to a z-axis, for example, by adjusting angles of a plurality of tires. Further, the moving unit 14 shown in Fig. 3 causes the movement sensor 1 to move straight by, for example, aligning directions of the plurality of tires.SELECTED DRAWING: Figure 2

Description

The present invention relates to a technology of a belongings inspection device that inspects belongings of a person using electromagnetic waves.

As a method of inspecting belongings, there is a method of inspecting the presence or absence of dangerous items hidden under clothes using electromagnetic waves. For example, Patent Literature 1 discloses a mobile scanner that detects the position of a moving object (mobile body) such as a pedestrian and switches the propagation direction of terahertz waves according to the detected position.

Further, Patent Literature 2 discloses a millimeter wave holographic imaging apparatus that makes a person, who is a subject, stand in a scanning space, generates a millimeter wave holographic image of the subject, and determines a suspected object.

JP 2019-190951 A JP 2015-36680 A

Since baggage inspections at airports do not require a relatively high processing speed, it is often the case that a plurality of staff members are assigned to each inspection route, and passengers are stopped one by one, and the inspection is carried out over a long period of time.

On the other hand, general facilities such as event venues, public transportation, office buildings, hotels, etc. require a higher processing speed for belonging inspection than airports. Therefore, there is a growing need for a belongings inspection device that inspects belongings of visitors to improve safety while maintaining the speed of entry (also referred to as throughput). When the throughput is emphasized, it is desirable to inspect moving objects such as pedestrians, for example, as in the technique disclosed in Patent Document 1 described above.

By the way, a belonging inspection device that inspects a moving object may not be able to clearly detect a dangerous object in exchange for throughput. In this case, the person in charge of the facility must stop the inspection subject who is about to enter and conduct an additional inspection of their belongings.

However, for this additional examination, additional cost and space are required to separately provide an apparatus for performing examination with the person to be examined standing, such as the apparatus disclosed in Patent Document 2, for example.

One of the objects of the present invention is to provide a belongings inspection device capable of inspecting belongings of a person to be inspected whether the person is moving or stationary.

A first aspect of the present invention is a belongings inspection device that inspects belongings of a person to be inspected by moving at least one of a plurality of sensors for sensing electromagnetic waves while maintaining the wave receiving direction. offer.

According to the belongings inspection device of the first aspect, the belongings of the person to be inspected can be inspected regardless of whether the person is moving or standing still.

In the belonging inspection device of the first aspect, a configuration in which at least two sensors sandwiching the person to be inspected among the plurality of sensors are moved may be adopted as a second aspect.

According to the belonging inspection device of the second aspect, it is possible to inspect from both sides of the person to be inspected who is stopped.

In the belonging inspection device of the second aspect, a configuration in which the two sensors are moved at the same time may be adopted as a third aspect.

According to the belonging inspection device of the third aspect, the person to be inspected can be inspected from two directions at the same time.

In the belonging inspection apparatus according to any one of the first to third aspects, when the person to be inspected is moving along the course, none of the plurality of sensors are moved, and the person to be inspected stops. A configuration may be adopted as a fourth aspect in which at least one of the plurality of sensors is moved when the sensor is on.

According to the belongings inspection device of the fourth aspect, it is possible to inspect belongings of the person to be inspected whether the person is moving or stationary.

In the belonging inspection device of the fourth aspect, a configuration may be adopted as a fifth aspect in which, when moving the sensor, the sensor is moved along the course.

According to the belonging inspection device of the fifth aspect, the course is not blocked by the sensor when inspecting the person to be inspected who is stopped.

In the belonging inspection device according to any one of the first to fifth aspects, when moving the sensor, the movement is started after changing the wave receiving direction, and the changed wave receiving direction is maintained during the movement. The configuration may be adopted as the sixth aspect.

According to the belongings inspection apparatus of the sixth aspect, when inspecting a person to be inspected who is standing still, the receiving direction is adjusted to a direction different from that when the person to be inspected is moving, and then the inspection is performed. Start.

1 is a plan view showing an example of a belonging inspection device 9 viewed from above according to an embodiment of the present invention; FIG. FIG. 2 is a side view of the internal configuration of the movement sensor 1; FIG. 2 is a top view of the internal configuration of the movement sensor 1; The figure which looked at the structure inside the fixed sensor 2 from the side. FIG. 2 is a top view of the internal configuration of the fixed sensor 2; 2 is a diagram showing an example of the configuration of an information processing device 3; FIG. FIG. 2 is a flowchart showing an example of the flow of operations of the belonging inspection device; FIG. 4 is a flowchart showing an example of the flow of operations of primary inspection processing; FIG. 10 is a flow diagram showing an example of the flow of operation of secondary inspection processing; The figure which shows the mode of the movement sensor 1 which rotates a receiving direction. The figure which shows the appearance of the movement sensor 1 which moves forward. The figure which shows the mode of the movement sensor 1 which moves in a reverse direction. FIG. 2 shows an example of a movement sensor 1 having a rotating part 15; The figure which shows the movement aspect of the movement sensor 1 in a modification.

<Embodiment>
<Configuration of belonging inspection device>
Hereinafter, in the drawings, the space in which each configuration is arranged is represented as an XYZ right-handed coordinate space or an xyz right-handed coordinate space. Also, of the coordinate symbols shown in the figure, the symbol drawn with a point in a circle represents an arrow pointing from the back side of the page to the front side, and the symbol with two intersecting lines in the circle represents a point on the page. An arrow pointing from the near side to the far side is shown. A direction along the x-axis in space is called an x-axis direction. In the x-axis direction, the direction in which the x component increases is called the +x direction, and the direction in which the x component decreases is called the -x direction. The y, z components and the X, Y, Z components are also defined in the same manner as the x component.

FIG. 1 is a plan view showing an example of a belonging inspection device 9 according to an embodiment of the present invention viewed from above. In FIG. 1, the −Z direction is downward, that is, the direction of gravity, the X-axis direction is the width direction of the track Pa, and the Y-axis direction is the direction along the track Pa. The belongings inspection device 9 is a device for inspecting belongings of the person Q walking in the +Y direction along the course Pa. This belongings inspection device 9 has a movement sensor 1 , a fixed sensor 2 and an entrance/exit detector 4 . Further, this belonging inspection device 9 has an information processing device 3 (not shown in FIG. 1).

Both the moving sensor 1 and the fixed sensor 2 receive (or receive) electromagnetic waves such as terahertz waves emitted from person Q and an object (referred to as belongings) possessed by person Q, respectively. , is a device that detects a person's belongings from the difference in the strength of the electromagnetic waves. The moving sensor 1 has the same configuration as the fixed sensor 2 except that it can move.

The movement sensors 1 shown in FIG. 1 are arranged one each on the left and right sides of the path Pa (that is, in the +Y direction). The fixed sensors 2 shown in FIG. 1 are arranged one each on the left and right sides of the path Pa (that is, in the -Y direction).

In the arrangement shown in FIG. 1, the moving sensor 1 and the fixed sensor 2 receive electromagnetic waves from the person Q and his belongings located near the center of the path Pa in the Y-axis direction. A path along which this electromagnetic wave propagates is called a propagation path D. FIG. The person Q is a person to be inspected by the moving sensor 1 and the fixed sensor 2 of the belongings inspection device 9, that is, a person to be inspected.

In FIG. 1, the fixed sensor 2 on the front right side and the moving sensor 1 on the back left side as viewed from the person Q moving in the +Y direction along the path Pa are opposed to each other. The same applies to the relationship between the fixed sensor 2 on the left front side and the moving sensor 1 on the right rear side as viewed from the person Q moving in the +Y direction along the path Pa.

A moving sensor 1 and a stationary sensor 2 scan the person Q and his belongings in the Z-axis direction, respectively. In addition, when the person Q walks (moves) in the +Y direction along the path Pa, the person Q and his belongings pass through the propagation path D of the electromagnetic waves received by the moving sensor 1 and the fixed sensor 2, respectively. . As a result, the moving sensor 1 and the stationary sensor 2 scan the person Q and his belongings in the Y-axis direction and the X-axis direction (that is, in the horizontal direction).

The entry/exit detector 4 is configured to detect that the person Q has entered or exited from a predetermined range of the route Pa. This predetermined range is a range in which electromagnetic waves are sensed by the moving sensor 1 and the fixed sensor 2 . As shown in FIG. 1, for example, the entrance/exit detector 4 has a set of an element that emits light such as infrared rays and an element that detects this light on the left and right, and detects that the person Q has blocked the light. Then, the entry and exit by the person Q is detected.

Note that the entrance/exit detector 4 is not limited to one that uses infrared rays or the like, and may be one that uses visible light, sound waves, or the like, for example. Also, the entrance/exit detector 4 may be a load cell arranged below the route Pa, for example. In this case, the entrance/exit detector 4 detects the entrance and exit of the person Q by measuring the weight of the person Q who has entered a predetermined range of the route Pa.

<Configuration of movement sensor>
FIG. 2 is a side view of the internal configuration of the movement sensor 1. As shown in FIG. FIG. 2 shows how the movement sensor 1 is viewed along the arrow II-II in FIG. FIG. 3 is a top view of the internal configuration of the movement sensor 1. As shown in FIG. FIG. 3 shows the interior of the movement sensor 1 located in area III in FIG.

Here, the xyz right-handed coordinates shown in FIG. 1 are coordinates obtained by rotating the XYZ right-handed coordinates about the Z axis and changing the names of X, Y, and Z to x, y, and z, respectively. Therefore, the z-axis direction of the xyz right-handed coordinate system is common to the Z-axis direction of the XYZ right-handed coordinate system. The direction in which the movement sensor 1 is viewed in FIG. 2 described above is the -y direction in the xyz right-handed system coordinates.

The movement sensor 1 shown in FIGS. 2 and 3 has a polygon mirror 10, a radome 11, a collecting mirror 12, a sensor 13, and a moving part 14. FIG. Further, the movement sensor 1 is connected to the information processing device 3 so as to be able to communicate wirelessly or by wire. The polygon mirror 10 , the condenser mirror 12 , the sensor 13 and the moving section 14 of the movement sensor 1 are controlled by the information processing device 3 .

Note that the polygon mirror 10 is omitted in FIG. Also, the sensor 13 and the information processing device 3 are omitted in FIG.

The radome 11 is a plate-like member, and is made of a resin material such as polyethylene, polypropylene, polytetrafluoroethylene, polymethylpentene, etc., through which electromagnetic waves are relatively easily transmitted. The radome 11 protects the inside from dust and the like while transmitting electromagnetic waves arriving from the outside of the housing of the movement sensor 1 to the inside.

The polygon mirror 10, the condenser mirror 12, and the sensor 13 constitute a sensor unit U1. This sensor unit U1 is, for example, a rectangular parallelepiped unit having a width of 200 mm, a depth of 300 mm, and a height of 400 mm.

The polygon mirror 10 shown in FIG. 3 is a polygonal mirror that rotates around an axis F extending in the y-axis direction. The shape of the polygon mirror 10 is, for example, a quadrangular pyramid. An electromagnetic wave propagating along the propagation path D is transmitted through the radome 11 , reflected by the polygon mirror 10 and collected by the collector mirror 12 .

Since the angle of the reflecting surface of the polygon mirror 10 is changed by rotation about the axis F, the range of wave reception (sensing) of the polygon mirror 10 is divided into a fan-shaped sensing area Ra centering on the axis F shown in FIG. Become. That is, when the polygon mirror 10 rotates about the axis F, the movement sensor 1 scans in the Z-axis direction.

The collecting mirror 12 shown in FIG. 2 is a mirror that reflects electromagnetic waves collected by scanning the sensing area Ra with the polygon mirror 10 (see FIG. 3) to the sensor 13 . The condenser mirror 12 is, for example, a parabolic mirror.

The sensing area Ra is an area in which electromagnetic waves can be sensed by the movement sensor 1 . The sensing area Ra shown in FIG. 2 extends from the +z direction to the −z direction about the axis F at an angle of about 100 degrees and a distance of about 1 meter. The thickness of the sensing area Ra in the y-axis direction is several centimeters.

The sensor 13 senses an electromagnetic wave such as a terahertz wave that is collected and reflected by the collecting mirror 12 and measures its intensity. A terahertz wave is, for example, an electromagnetic wave with a frequency of 100 GHz or more and less than 10 THz. The sensor 13 shown in FIG. 2 senses electromagnetic waves in the 100 GHz band emitted from person Q shown in FIG. That is, this sensor 13 is an example of a sensor that senses electromagnetic waves emitted from a person to be inspected.

For example, person Q emits terahertz waves in the 100 GHz band. On the other hand, if the person Q hides an object, such as a metal, that does not easily transmit the terahertz waves inside the clothes, the terahertz waves emitted by the person Q are blocked by the object. Therefore, when the movement sensor 1 scans the person Q, it generates an image in which the intensity of the received waves differs according to the outline of the object. The information processing device 3 acquires and analyzes the image generated by the movement sensor 1 to specify the shape of the person Q's belongings.

In this way, the belongings inspection device 9 senses objects such as metals, explosives, ceramics, and flammable liquids that the person Q has hidden inside the clothes.

Note that, depending on the spatial resolution of the sensor 13, an object that can be inspected by the movement sensor 1 has a size of 10 centimeters square or more and a thickness of 3 centimeters or more, for example. Moreover, the upper limit of the movement speed at which inspection is possible even if the object moves is 4 kilometers per hour due to the temporal resolution of the sensor 13 . Moreover, the time required for the inspection by the movement sensor 1 is, for example, 0.03 seconds.

The moving unit 14 is configured to move the movement sensor 1 under the control of the information processing device 3 . The moving part 14 shown in FIG. 2 has a motor, swivel casters, tires, and the like. The moving unit 14 moves the movement sensor 1 by driving the grounded tire.

The moving unit 14 shown in FIG. 3 rotates the movement sensor 1 about an axis parallel to the z-axis by adjusting the angles of four tires, for example. Further, the moving unit 14 shown in FIG. 3 causes the movement sensor 1 to move straight by, for example, aligning the directions of the four tires.

<Structure of fixed sensor>
FIG. 4 is a side view of the internal configuration of the fixed sensor 2. As shown in FIG. FIG. 4 shows a view of the fixed sensor 2 along the arrow IV-IV in FIG. FIG. 5 is a top view of the internal configuration of the fixed sensor 2. As shown in FIG. FIG. 5 shows the interior of fixed sensor 2 located in region V in FIG.

The fixed sensor 2 shown in FIGS. 4 and 5 has a polygon mirror 20, a radome 21, a collecting mirror 22, and a sensor 23. FIG. These correspond to the polygon mirror 10, radome 11, condenser mirror 12, and sensor 13 in the movement sensor 1, respectively. The sensor unit U2 in the fixed sensor 2 corresponds to the sensor unit U1 in the mobile sensor 1. FIG.

Further, this fixed sensor 2 is connected to the information processing device 3 so as to be able to communicate wirelessly or by wire, like the mobile sensor 1 described above. The polygon mirror 20 , the condenser mirror 22 and the sensor 23 of the fixed sensor 2 are controlled by the information processing device 3 .

The fixed sensor 2 differs from the moving sensor 1 in that it does not have a structure corresponding to the moving part 14 . Therefore, the stationary sensor 2 does not move like the moving sensor 1 does.

<Configuration of information processing device>
FIG. 6 is a diagram showing an example of the configuration of the information processing device 3. As shown in FIG. As shown in FIG. 6 , the belonging inspection device 9 has an information processing device 3 connected to the movement sensor 1 , the fixed sensor 2 , and the entrance/exit detector 4 . The information processing device 3 has a processor 31 , a memory 32 , an interface 33 and a display section 35 .

The memory 32 has a RAM (Random Access Memory), a ROM (Read Only Memory), a solid state drive, a hard disk drive, etc., and stores an operating system, various computer programs (hereinafter simply referred to as programs), data, and the like. .

The processor 31 reads and executes an operating system and programs from the memory 32 to control each part of the information processing device 3 . The processor 31 is, for example, a CPU (Central Processing Unit). Also, the processor 31 may be, for example, an FPGA (Field Programmable Gate Array) or may include an FPGA. The processor may also have an ASIC (Application Specific Integrated Circuit) or other programmable logic device for control.

The interface 33 is a communication circuit that communicably connects the information processing device 3 to another device by wire or wirelessly. This interface 33 is connected to the moving sensor 1, fixed sensor 2, and entrance/exit detector 4 so as to be able to communicate with each other.

When the entrance/exit detector 4 detects that the person Q has entered or left the predetermined range, the interface 33 acquires the information and transmits it to the processor 31 .

Further, the moving sensor 1 and the fixed sensor 2 receive electromagnetic waves emitted from the space containing the person Q, generate an image corresponding to the intensity of each direction of the electromagnetic wave, and send the image to the information processing device 3. . The interface 33 of the information processing device 3 acquires this image and delivers it to the processor 31 . Processor 31 analyzes this image to identify the shape of person Q's belongings.

The display unit 35 has a display screen such as a liquid crystal display, and displays images under the control of the processor 31 . In addition, the display unit 35 includes display screens provided at the entrance side of the route Pa and at the center. A display screen provided on the entrance side displays a message or the like to the person to be examined who is about to enter the predetermined area of the route Pa. A display screen provided in the center displays a message or the like to the person to be examined who is in a predetermined area of the course Pa.

<Operation of belonging inspection device>
FIG. 7 is a flowchart showing an example of the flow of operations of the belonging inspection device. When the operating system is started, the processor 31 controls the screen at the entrance among the display screens of the display unit 35 to notify that the passage is prohibited (step S001). Then, the processor 31 activates the inspection program and performs activation processing for initializing each unit (step S002). This start-up processing includes, for example, checking the number of revolutions of motors (not shown) in each of the sensor unit U1 of the moving sensor 1 and the sensor unit U2 of the fixed sensor 2, calibration, and the like.

Processor 31 determines whether or not an abnormality has occurred in the startup process (step S003). If it is determined that an abnormality has occurred (step S003; YES), the processor 31 notifies the abnormality through the display unit 35 (step S004), and terminates the process.

On the other hand, if it is determined that no abnormality has occurred (step S003; NO), the processor 31 notifies passage permission on the screen at the entrance (step S005), and executes primary inspection processing (step S005). S100).

FIG. 8 is a flowchart showing an example of the operation flow of the primary inspection process. The processor 31 determines whether or not the entrance/exit detector 4 has detected the entrance of the person Q based on the information acquired from the entrance/exit detector 4 (step S101). While the entrance/exit detector 4 determines that the entry of the person Q has not been detected (step S101; NO), the processor 31 continues this determination.

On the other hand, when it is determined that the entry/exit detector 4 has detected the entrance of the person Q (step S101; YES), the processor 31 causes the display screen at the entrance of the display unit 35 to notify that passage is prohibited (step S102). , the moving sensor 1 and the fixed sensor 2 scan the person Q who enters the route Pa and walks along the route Pa (step S103).

Then, the processor 31 generates an image based on the strength signal for each receiving direction of the electromagnetic waves obtained by the scanning (step S104), analyzes this image, and suspects that the person Q is carrying dangerous goods. (step S105).

In the primary inspection, the person Q who walks, that is, moves along the course Pa is inspected. And in this primary test, the movement sensor 1 does not move. In other words, this belongings inspection device 9 is an example of a belongings inspection device that does not move any of the plurality of sensors while the person being inspected is moving along the course.

When it is determined that there is no suspicion that the person Q is in possession of a dangerous object (step S105; NO), the processor 31 guides the person Q to leave (step S106), and the entrance/exit detector 4 detects that the person Q It is determined whether or not exit is detected (step S107).

While it is determined that the entrance/exit detector 4 has not detected the exit of the person Q (step S107; NO), the processor 31 returns the process to step S106.

On the other hand, when it is determined that the entry/exit detector 4 has detected the exit of the person Q (step S107; YES), the processor 31 causes the display screen at the entrance to notify the entry permission (step S108), and ends the process. do.

If it is determined in step S105 that the person Q is suspected of possessing a dangerous substance (step S105; YES), the processor 31 causes the display unit 35 to issue a warning that the person Q is suspected of possessing a dangerous substance. (Step S109).

The processor 31 then determines whether or not a secondary inspection is necessary (step S110). When determining that the secondary inspection is necessary (step S110; YES), the processor 31 executes secondary inspection processing (step S200). On the other hand, when determining that the secondary inspection is not necessary (step S110; NO), the processor 31 ends the process without executing step S200.

FIG. 9 is a flow diagram showing an example of the flow of operation of secondary inspection processing. The processor 31 controls the movement sensor 1 through the interface 33 to rotate its wave receiving direction (step S201).

FIG. 10 is a diagram showing how the movement sensor 1 rotates the wave receiving direction. FIG. 10 shows a top view of the configuration of the belonging inspection device 9. As shown in FIG. Movement sensor 1 in FIG. 10 rotates in the direction of arrow M1 under the control of information processor 3 (not shown). This rotation is realized by the moving part 14 of the movement sensor 1 . Due to this rotation, the propagation path D, which is the wave receiving direction of the movement sensor 1, becomes a direction along the X-axis direction.

When the wave receiving direction of the movement sensor 1 is rotated, as shown in FIG. 9, the processor 31 guides the person Q who is the person to be inspected to take the first posture (step S202). Here, the first posture is the first posture of the person to be inspected who stopped in the secondary inspection process, and is, for example, a standing position in which the front of the body faces the traveling direction of the path Pa. Guidance of posture may be performed by, for example, a speaker (not shown) that outputs sound under the control of the information processing device 3 . Guidance of posture may be performed by display on the liquid crystal screen of the display unit 35 .

After guiding to the first posture, the processor 31 determines whether or not the first posture of the person Q has been confirmed (step S203). This confirmation may be performed by analyzing the image of the surveillance camera, or may be performed by the operator of the belongings inspection device 9 .

While determining that the first posture of the person Q has not been confirmed (step S203; NO), the processor 31 continues this determination. On the other hand, if it is determined that the first posture of the person Q has been confirmed (step S203; YES), the processor 31 moves the movement sensor 1 in the forward direction to perform scanning (step S204).

FIG. 11 is a diagram showing movement sensor 1 moving in the forward direction. Here, the forward direction is the direction toward the position of the fixed sensor 2 . In the example shown in FIG. 11, the forward direction is the -Y direction. The movement sensors 1 arranged one by one on the left and right on the far side of the course Pa move electromagnetic waves along the propagation path D while moving straight forward in the direction of arrow M2 under the control of the information processing device 3. receive waves.

At this time, the person Q is stopped while maintaining the first posture in which the front of the body is directed along the traveling direction of the path Pa (+Y direction). Then, the movement sensor 1 moving in the forward direction to scan the person Q receives the electromagnetic waves through the propagation path D along the direction perpendicular to the traveling direction of the path Pa. While moving forward, the movement sensor 1 maintains the receiving direction. Therefore, the movement sensor 1 generates an image based on the electromagnetic waves emitted from the lateral direction of the person Q. FIG.

In other words, the property inspection device 9 having this movement sensor 1 moves at least one of a plurality of sensors that detect electromagnetic waves while maintaining the wave receiving direction to inspect the property of the person to be inspected. It is an example of a belongings inspection device that does.

In addition, the movement sensors 1 arranged on the left and right respectively sandwich the route Pa, and the person Q is located on the route Pa. Therefore, these two movement sensors 1 move simultaneously across the person Q who is the person to be inspected.

In other words, the belongings inspection device 9 having this movement sensor 1 is an example of a belongings inspection device that moves at least two of a plurality of sensors sandwiching the person to be inspected. Moreover, the belongings inspection device 9 having this movement sensor 1 is an example of a belongings inspection device in which two sensors are moved at the same time.

When the movement sensor 1 is moved in the forward direction, the processor 31 guides the person Q who is the person to be inspected to assume the second posture, as shown in FIG. 9 (step S205). Here, the second posture is the second posture of the person to be inspected who stopped in the secondary inspection process, and is, for example, a standing position in which the front of the body is oriented in a direction perpendicular to the traveling direction of the path Pa. .

After guiding to the second posture, the processor 31 determines whether or not the second posture of the person Q has been confirmed (step S206). This confirmation may be performed by analyzing the image of the surveillance camera, or may be performed by the operator of the belongings inspection device 9 .

While determining that the second posture of the person Q has not been confirmed (step S206; NO), the processor 31 continues this determination. On the other hand, if it is determined that the second posture of the person Q has been confirmed (step S206; YES), the processor 31 causes the movement sensor 1 to move in the opposite direction and scan (step S207).

FIG. 12 is a diagram showing movement sensor 1 moving in the opposite direction. Here, the reverse direction is the direction opposite to the forward direction, and is the direction away from the position of the fixed sensor 2 . In the example shown in FIG. 12, the reverse direction is the +Y direction.

In step S204, the mobile sensor 1 moves forward and approaches the fixed sensor 2. Under the control of the information processing device 3, the mobile sensor 1 travels straight in the direction of arrow M3, which is the reverse direction, while transmitting electromagnetic waves to the propagation path D. receive waves along

At this time, the person Q is stopped while maintaining the second posture in which the front of the body faces the direction orthogonal to the traveling direction of the path Pa (+Y direction). Then, the movement sensor 1 moving in the opposite direction to scan the person Q receives the electromagnetic wave through the propagation path D along the direction orthogonal to the traveling direction of the path Pa. While moving in the opposite direction, the movement sensor 1 maintains the receiving direction. Therefore, the movement sensor 1 generates an image based on electromagnetic waves emitted from the front and rear directions of the person Q. FIG.

When the movement sensor 1 is moved in the reverse direction and returned to the position where it started moving in the forward direction, the processor 31 rotates the movement sensor 1 to restore its receiving direction ( step S208). At this time, the movement sensor 1 rotates in the opposite direction of the arrow M1 shown in FIG. 10 and returns to its original position.

The processor 31 analyzes an image observed from the side of the person Q generated when the movement sensor 1 is moved in the forward direction. Further, the processor 31 analyzes the images observed from the front and back of the person Q generated when the movement sensor 1 is moved in the reverse direction (step S209).

Then, the processor 31 identifies the shape of the belonging based on the result of the image analysis. The processor 31, for example, refers to a database that stores the shapes of dangerous substances stored in the memory 32, and calculates the degree of matching between the specified shape and the shape of the dangerous substances stored in advance (step S210).

The processor 31 determines whether or not there is a suspicion that the person Q possesses a dangerous substance based on the calculated degree of matching (step S211).

Here, in the secondary examination, the person Q who is the person to be examined is stopped while maintaining the first posture or the second posture according to the instruction. At this time, the belongings inspection device 9 receives electromagnetic waves emitted from the person Q by moving the two movement sensors 1 . In other words, this belongings inspection device 9 is an example of a belongings inspection device that moves at least one of a plurality of sensors when the person to be inspected is stopped.

Further, in the secondary inspection of this embodiment, both the forward direction and the reverse direction in which the movement sensor 1 moves are directions along the track Pa. In other words, this belongings inspection device 9 is an example of a belongings inspection device that moves the sensor along the course when moving the sensor.

When determining that the person Q is suspected of possessing a dangerous substance (step S211; YES), the processor 31 issues a warning through the display unit 35 (step S212), and terminates the process.

On the other hand, when determining that there is no suspicion that the person Q possesses a dangerous substance (step S211; NO), the processor 31 guides the person Q to leave (step S213). Then, the processor 31 determines whether or not the entrance/exit detector 4 has detected the exit of the person Q (step S214).

While determining that the entrance/exit detector 4 has not detected exit of the person Q (step S214; NO), the processor 31 returns the process to step S213.

On the other hand, when it is determined that the entrance/exit detector 4 has detected the exit of the person Q (step S214; YES), the processor 31 causes the display screen at the entrance to notify the passage permission (step S215), and ends the process. do.

By performing the operations described above, the belongings inspection device 9 uses the movement sensor 1 used for the primary inspection for the secondary inspection, so there is no need to separately provide a space or device for the secondary inspection. good.

The configurations, shapes, sizes, and arrangement relationships described in the above embodiments are merely schematic representations to the extent that the present invention can be understood and implemented. Therefore, the present invention is not limited to the described embodiments, but can be modified in various forms without departing from the scope of the technical concept indicated in the claims.

<Modification>
The above is the description of the embodiment, but the content of this embodiment can be modified as follows. Moreover, the following modifications may be combined.

<1>
In the above-described embodiment, the moving unit 14 can move the movement sensor 1 not only linearly but also rotationally, but the moving unit 14 may only move the movement sensor 1 linearly. In this case, the movement sensor 1 may have a rotating section 15 that rotates its own sensor unit U1 about an axis parallel to the z-axis.

FIG. 13 is a diagram showing an example of the movement sensor 1 having the rotating part 15. As shown in FIG. In the movement sensor 1 shown in FIG. 13, a rotating section 15 is mounted on a moving section 14 including a motor and tires, and a housing housing a sensor unit U1 of the movement sensor 1 is further mounted thereon. . The rotating unit 15 is a turntable having an axis parallel to the z-axis, and can rotate the housing above with respect to the moving unit 14 below under the control of the information processing device 3 . In this case as well, the wave receiving direction of the movement sensor 1 rotates.

In this modification, since the moving part 14 does not need to change the wave receiving direction of the movement sensor 1, it may include wheels that run along rails. Also, the moving part 14 may include a pinion in a rack and pinion mechanism. In this case, the rails or racks on which the movement sensor 1 rides via the wheels or pinions described above may be provided along the path Pa.

Further, in this modified example, since the rotating part 15 is mounted on the moving part 14, the wave receiving direction of the movement sensor 1 can be rotated even if the moving part 14 does not move. Therefore, this belongings inspection device 9 is an example of a belongings inspection device that, when moving the sensor, starts moving after changing the wave receiving direction, and maintains the changed wave receiving direction during the movement.

<2>
In the above-described embodiment, the belonging inspection device 9 rotates the movement sensor 1 to change the wave receiving direction, and then moves the movement sensor 1 straight. However, the belonging inspection device 9 does not have to change the wave receiving direction of the movement sensor 1 before moving the movement sensor 1 straight.

FIG. 14 is a diagram showing a movement mode of the movement sensor 1 in the modified example. The movement sensors 1 shown in FIG. 14 are arranged on the front right side and the back left side of the path Pa, respectively. In addition, the fixed sensors 2 shown in FIG. 14 are arranged on the front left side and the back right side of the path Pa, respectively.

When starting the secondary inspection, the belongings inspection device 9 shown in FIG. 14 prompts the person Q who is the person to be inspected to take the third posture. This third posture is, for example, at an angle of 45 degrees to the left with respect to the path Pa.

Then, this belonging inspection device 9 directs the above-described two movement sensors 1 to the person Q who is in the third posture in the direction of arrow M4, which is the direction diagonally right at 45 degrees to the path Pa. It is made to reciprocate by straight movement along. The movement sensor 1 receives electromagnetic waves via the propagation path D during this reciprocation, and generates an image based on these electromagnetic waves. In this case, the wave receiving direction of the movement sensor 1 during the secondary inspection does not change from that during the primary inspection. Even with this configuration, the movement sensor 1 can inspect the belongings regardless of whether the person to be inspected is moving or not.

DESCRIPTION OF SYMBOLS 1... Movement sensor, 10... Polygon mirror, 11... Radome, 12... Condensing mirror, 13... Sensor, 14... Moving part, 15... Rotating part, 2... Fixed sensor, 20... Polygon mirror, 21... Radome, 22... Condensing mirror, 23... Sensor, 3... Information processing device, 31... Processor, 32... Memory, 33... Interface, 35... Display unit, 4... Entrance/exit detector, 9... Possession inspection device, U1, U2 …Sensor unit

Claims (6)

A belongings inspection device for inspecting belongings of a person to be inspected by moving at least one of a plurality of sensors for sensing electromagnetic waves while maintaining a wave receiving direction. 2. The belonging inspection device according to claim 1, wherein at least two sensors sandwiching the person to be inspected among the plurality of sensors are moved. The belonging inspection device according to claim 2, wherein the two sensors are moved simultaneously. None of the plurality of sensors is moved when the subject is moving along the path, and at least one of the plurality of sensors is moved when the subject is stationary. Item 4. The belonging inspection device according to any one of Items 1 to 3. The belonging inspection device according to claim 4, wherein when the sensor is moved, the sensor is moved along the course. The belonging inspection device according to any one of claims 1 to 5, wherein when the sensor is moved, the movement is started after changing the wave receiving direction, and the changed wave receiving direction is maintained during the movement.

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