Possession inspection device

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

[Technical Field]

[0001] The present invention relates to a technology for a personal belongings inspection device that inspects a person's belongings using electromagnetic waves. [Background technology]

[0002] One method for inspecting personal belongings is to use electromagnetic waves to check for the presence of dangerous objects concealed under clothing. For example, Patent Document 1 discloses a mobile object scanner that detects the position of a moving object (mobile object) such as a pedestrian and switches the propagation direction of terahertz waves depending on the detected position.

[0003] Furthermore, Patent Document 2 discloses a millimeter wave holographic imaging device that generates a millimeter wave holographic image of a human subject standing in a scanning space, and identifies suspected objects. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-190951 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-36680 Summary of the Invention [Problem to be solved by the invention]

[0005] Since baggage inspections at airports do not require speed, multiple officers are stationed along each inspection route, and passengers are often stopped one by one for the process, which takes time.

[0006] On the other hand, general facilities such as event venues, public transportation, office buildings, and hotels require faster processing speeds for personal belongings inspection than airports. Therefore, there is a growing need for personal belongings inspection devices that improve safety by inspecting the belongings of visitors while maintaining the speed of entry (also known as throughput). When throughput is important, it is desirable to inspect moving objects such as pedestrians, as in the technology disclosed in Patent Document 1 mentioned above.

[0007] However, in exchange for throughput, personal property inspection devices that inspect moving objects may not be able to clearly detect dangerous objects. In such cases, facility personnel must stop the person attempting to enter and conduct an additional personal property inspection.

[0008] However, providing a separate device for this additional examination, such as the device shown in Patent Document 2, in which the subject is examined while standing, requires additional costs and space.

[0009] One object of the present invention is to provide a personal belongings inspection device that can inspect the belongings of a person to be inspected whether the person is moving or stationary. [Means for solving the problem]

[0010] The present invention provides Issued by the person being tested Multiple sensors that detect electromagnetic waves and when the subject of inspection is moving along a path, none of the plurality of sensors is moved, and when the subject of inspection is standing still, none of the plurality of sensors is moved. At least one of the units must be moved while maintaining the direction of reception. The aforementioned A first aspect of the present invention provides a personal belongings inspection device that inspects personal belongings of an inspection subject.

[0011] According to the belongings inspection device of the first aspect, belongings of a person to be inspected can be inspected whether the person is moving or stationary.

[0012] In the first aspect of the possession inspection device, When the detector is moved, A second aspect may employ a configuration in which at least two of the plurality of sensors that sandwich the subject are moved.

[0013] According to the belongings inspection device of the second aspect, it is possible to inspect a stationary inspection subject from both sides, with the person sandwiched between them.

[0014] In the possession inspection device of the second aspect, When the detector is moved, A third aspect may be adopted in which two of the sensors are moved simultaneously.

[0015] According to the third aspect of the personal belongings inspection device, the person to be inspected can be inspected from two directions simultaneously.

[0018] No. 1 any one of the three In the belongings inspection device of the above aspect, when the detector is moved, the detector is moved along the path. 4 This may be adopted as an embodiment.

[0019] No. 4 According to the possession inspection device of this aspect, the path is not blocked by the detector when inspecting a stopped person to be inspected.

[0020] 1st to 3rd 4 In the belongings inspection device of any one of the above aspects, when the detector is moved, the detector changes the wave receiving direction before starting the movement, and maintains the changed wave receiving direction during the movement. 5 This may be adopted as an embodiment.

[0021] No. 5 According to the possession inspection device of this aspect, when inspecting a stationary inspection subject, the wave receiving direction is adjusted to a direction different from that when the inspection subject is moving, and then the inspection begins. In a personal possession inspection device of any one of the first to fifth aspects, a sixth aspect may adopt a configuration in which, when the sensor is moved, the sensor is moved in a first direction after confirming a first posture of the stopped subject, and the sensor is moved in a second direction different from the first direction after confirming a second posture of the stopped subject that is different from the first posture. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a plan view showing an example of a belongings inspection device 9 according to an embodiment of the present invention as seen from above. [Figure 2] FIG. 2 is a side view of the internal configuration of the movement detector 1. [Figure 3] FIG. 2 is a top view of the internal configuration of the movement detector 1. [Figure 4] FIG. 2 is a side view of the internal configuration of the fixed sensor 2. [Figure 5] FIG. 2 is a top view of the internal structure of the fixed sensor 2. [Figure 6] FIG. 2 is a diagram showing an example of the configuration of an information processing device 3. [Figure 7] FIG. 10 is a flowchart showing an example of the operation flow of a belongings inspection device. [Figure 8] FIG. 10 is a flowchart showing an example of the operation flow of a primary inspection process. [Figure 9] FIG. 10 is a flowchart showing an example of the operation flow of the secondary inspection process. [Figure 10] FIG. 2 is a diagram showing the state of the motion detector 1 that rotates the wave receiving direction. [Figure 11] FIG. 2 is a diagram showing the state of the motion detector 1 moving in the forward direction. [Figure 12] FIG. 10 is a diagram showing the movement detector 1 moving in the reverse direction. [Figure 13] 1 is a diagram showing an example of a movement sensor 1 having a rotating part 15. FIG. [Figure 14] 10A and 10B are diagrams showing the movement of the movement detector 1 in a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0023] <Embodiment> <Configuration of possession inspection device> In the following figures, the space in which each component is arranged is represented as an XYZ right-handed coordinate space or an xyz right-handed coordinate space. Among the coordinate symbols shown in the figures, a dot in a circle represents an arrow pointing from the back of the page to the front, and a circle with two intersecting lines represents an arrow pointing from the front of the page to the back. The direction along the x-axis in space is called 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, X, Y, and Z components are defined in the same way as the x-component.

[0024] FIG. 1 is a plan view showing an example of a personal belongings inspection device 9 according to an embodiment of the present invention, viewed from above. In FIG. 1, the -Z direction is downward, i.e., the direction of gravity, the X axis direction is the direction of the width of path Pa, and the Y axis direction is the direction along path Pa. The personal belongings inspection device 9 is a device that inspects the belongings of person Q walking in the +Y direction along path Pa. This personal belongings inspection device 9 has a movement detector 1, a fixed detector 2, and an entrance / exit detector 4. In addition, this personal belongings inspection device 9 has an information processing device 3, which is not shown in FIG. 1.

[0025] Both mobile detector 1 and fixed detector 2 are devices that receive (or receive) electromagnetic waves such as terahertz waves emitted by person Q and objects (called possessions) held by person Q, and detect the possessions from the difference in the intensity of the electromagnetic waves. Mobile detector 1 has a common configuration with fixed detector 2, except that it can move.

[0026] The mobile sensors 1 shown in Fig. 1 are arranged one on each side of the path Pa on the far side (i.e., in the +Y direction). The fixed sensors 2 shown in Fig. 1 are arranged one on each side of the path Pa on the near side (i.e., in the -Y direction).

[0027] When arranged as shown in Figure 1, mobile detector 1 and fixed detector 2 receive electromagnetic waves from person Q and his / her belongings, who are located near the center of the Y-axis direction of path Pa. The path along which these electromagnetic waves propagate is called propagation path D. Person Q is the person who is the subject of inspection by mobile detector 1 and fixed detector 2 of possessions inspection device 9, i.e., the person being inspected.

[0028] 1, the fixed sensor 2 on the front right side and the mobile sensor 1 on the back left side are opposed to each other as seen by a person Q moving in the +Y direction along path Pa. The same holds true for the relationship between the fixed sensor 2 on the front left side and the mobile sensor 1 on the back right side as seen by a person Q moving in the +Y direction along path Pa.

[0029] Mobile detector 1 and fixed detector 2 each scan person Q and his / her belongings in the Z-axis direction. Furthermore, as person Q walks (moves) along path Pa in the +Y direction, person Q and his / her belongings pass through propagation path D of the electromagnetic waves received by mobile detector 1 and fixed detector 2. As a result, mobile detector 1 and fixed detector 2 scan person Q and his / her belongings in the Y-axis direction and X-axis direction (i.e., horizontally).

[0030] The entrance / exit detector 4 is configured to detect when a person Q enters or exits a predetermined range on the path Pa. This predetermined range is the range in which electromagnetic waves are detected by the mobile sensor 1 and the fixed sensor 2. As shown in FIG. 1, for example, the entrance / exit detector 4 has a pair of an element that emits light such as infrared light and an element that detects this light, arranged on the left and right, and detects when the person Q blocks the light, thereby detecting the entry and exit of the person Q.

[0031] The entrance and exit detector 4 is not limited to those using infrared rays or the like, and may be those using visible light, sound waves, or the like. The entrance and exit detector 4 may also be, for example, a load cell placed below the path Pa. In this case, the entrance and exit detector 4 detects the entry and exit of person Q by measuring the weight of person Q who enters a predetermined range of path Pa.

[0032] <Configuration of the movement detector> Fig. 2 is a side view of the internal configuration of the movement detector 1. Fig. 2 shows the movement detector 1 as viewed from the arrow II-II in Fig. 1. Fig. 3 is a top view of the internal configuration of the movement detector 1. Fig. 3 shows the inside of the movement detector 1 arranged in area III in Fig. 1.

[0033] Here, the xyz right-handed coordinate system shown in Fig. 1 is obtained by rotating the XYZ right-handed coordinate system around 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 the same as the Z-axis direction of the XYZ right-handed coordinate system. In Fig. 2 described above, the direction in which motion sensor 1 is viewed is the -y direction in the xyz right-handed coordinate system.

[0034] 2 and 3 includes a polygon mirror 10, a radome 11, a collecting mirror 12, a sensor 13, and a moving unit 14. The movement detector 1 is also connected to an information processing device 3 so as to be able to communicate wirelessly or via a wire. The polygon mirror 10, the collecting mirror 12, the sensor 13, and the moving unit 14 of the movement detector 1 are controlled by the information processing device 3.

[0035] It should be noted that the polygon mirror 10 is omitted in Fig. 2. Furthermore, the sensor 13 and the information processing device 3 are omitted in Fig. 3.

[0036] The radome 11 is a plate-shaped member made of a resin material that is relatively easy to transmit electromagnetic waves, such as polyethylene, polypropylene, polytetrafluoroethylene, polymethylpentene, etc. The radome 11 allows electromagnetic waves arriving from outside the housing of the movement detector 1 to pass through to the inside, while protecting the inside from dust and the like.

[0037] The polygon mirror 10, the condenser mirror 12, and the sensor 13 constitute a sensor unit U1. This sensor unit U1 is a rectangular parallelepiped unit with a width of 200 mm, a depth of 300 mm, and a height of 400 mm, for example.

[0038] 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. Electromagnetic waves propagating along a propagation path D pass through a radome 11, are reflected by the polygon mirror 10, and are collected by a collecting mirror 12.

[0039] Rotation around axis F changes the angle of the reflecting surface of polygon mirror 10, so the wave receiving (sensing) range of polygon mirror 10 becomes a sector-shaped sensing area Ra centered on axis F as shown in Figure 2. In other words, rotation of polygon mirror 10 around axis F causes movement detector 1 to scan in the Z-axis direction.

[0040] 2 is a mirror that reflects the electromagnetic waves collected by scanning the sensing area Ra with the polygon mirror 10 (see FIG. 3) to the sensor 13. The collecting mirror 12 is, for example, a parabolic mirror.

[0041] The sensing area Ra is an area in which electromagnetic waves can be sensed by the motion sensor 1. The sensing area Ra shown in Fig. 2 is within an angle of approximately 100 degrees from the +z direction to the -z direction around the axis F, and a distance of approximately 1 meter. The thickness of the sensing area Ra in the y-axis direction is several centimeters.

[0042] Sensor 13 senses electromagnetic waves such as terahertz waves collected and reflected by collecting mirror 12 and measures their intensity. Terahertz waves are, for example, electromagnetic waves with a frequency of 100 GHz or more and less than 10 THz. Sensor 13 shown in FIG. 2 senses electromagnetic waves in the 100 GHz band emitted from person Q shown in FIG. 1. In other words, sensor 13 is an example of a sensor that senses electromagnetic waves emitted from the person being tested.

[0043] For example, person Q emits terahertz waves in the 100 GHz band. On the other hand, if person Q hides an object that is difficult for terahertz waves to penetrate, such as metal, inside their clothing, the terahertz waves emitted by person Q are blocked by that object. Therefore, when the movement detector 1 scans person Q, it generates an image in which the intensity of the received waves varies around the outline of the object. The information processing device 3 acquires and analyzes this image generated by the movement detector 1 to identify the shape of person Q's belongings.

[0044] In this way, the personal belongings inspection device 9 detects objects such as metals, explosives, ceramics, flammable liquids, etc. that person Q has hidden inside his / her clothing.

[0045] Due to the spatial resolution of sensor 13, the object that can be inspected by motion detector 1 is, for example, an object that is 10 centimeters square or larger and 3 centimeters or larger in thickness. Furthermore, due to the temporal resolution of sensor 13, the upper limit of the speed at which the object can be inspected is 4 kilometers per hour. Furthermore, the time required for motion detector 1 to perform an inspection is, for example, 0.03 seconds.

[0046] The moving unit 14 is configured to move the movement detector 1 under the control of the information processing device 3. The moving unit 14 shown in Fig. 2 includes a motor, swivel casters, tires, etc. The moving unit 14 moves the movement detector 1 by driving the tires that are in contact with the ground.

[0047] The moving unit 14 shown in Fig. 3 rotates the movement detector 1 around an axis parallel to the z-axis by, for example, adjusting the angles of the four tires. Also, the moving unit 14 shown in Fig. 3 moves the movement detector 1 in a straight line by, for example, aligning the directions of the four tires.

[0048] <Configuration of fixed detector> Fig. 4 is a side view of the internal configuration of the fixed detector 2. Fig. 4 shows the fixed detector 2 as viewed from the arrow IV-IV in Fig. 1. Fig. 5 is a top view of the internal configuration of the fixed detector 2. Fig. 5 shows the inside of the fixed detector 2 arranged in area V in Fig. 1.

[0049] 4 and 5 has a polygon mirror 20, a radome 21, a collecting mirror 22, and a sensor 23. These correspond to the polygon mirror 10, the radome 11, the collecting mirror 12, and the sensor 13 in the mobile sensor 1, respectively. The sensor unit U2 in the fixed sensor 2 corresponds to the sensor unit U1 in the mobile sensor 1.

[0050] Furthermore, like the mobile sensor 1 described above, the fixed sensor 2 is connected to the information processing device 3 wirelessly or via wire so as to be able to communicate with the information processing device 3. The polygon mirror 20, the collecting mirror 22, and the sensor 23 of the fixed sensor 2 are controlled by the information processing device 3.

[0051] The fixed sensor 2 differs from the mobile sensor 1 in that it does not have a configuration equivalent to the moving section 14. Therefore, the fixed sensor 2 does not move like the mobile sensor 1.

[0052] <Configuration of information processing device> 6 is a diagram showing an example of the configuration of the information processing device 3. As shown in Fig. 6, the possession inspection device 9 has an information processing device 3 connected to a moving detector 1, a fixed detector 2, and an entrance / exit detector 4. The information processing device 3 has a processor 31, a memory 32, an interface 33, and a display unit 35.

[0053] The memory 32 includes 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, etc.

[0054] The processor 31 controls each part of the information processing device 3 by reading and executing an operating system and programs from the memory 32. The processor 31 is, for example, a CPU (Central Processing Unit). The processor 31 may also 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 and perform control using these.

[0055] The interface 33 is a communication circuit that communicatively connects the information processing device 3 to other devices via wire or wirelessly. The interface 33 is communicatively connected to the movement detector 1, the fixed detector 2, and the entrance / exit detector 4, respectively.

[0056] When the entrance / exit detector 4 detects that a person Q has entered or exited a predetermined range, the interface 33 acquires the information and transmits it to the processor 31.

[0057] Furthermore, the mobile detector 1 and the fixed detector 2 receive electromagnetic waves emitted from the space including the person Q, generate images according to the strength of the electromagnetic waves for each direction, and send them to the information processing device 3. The interface 33 of the information processing device 3 acquires these images and passes them to the processor 31. The processor 31 analyzes these images to identify the shapes of the items held by the person Q.

[0058] The display unit 35 has a display screen such as a liquid crystal display, and displays images under the control of the processor 31. The display unit 35 also includes display screens provided on the entrance side of the route Pa and in the center. The display screen provided on the entrance side displays messages, etc. to the test subject who is about to enter the specified area of ​​the route Pa. The display screen provided in the center displays messages, etc. to the test subject who is within the specified area of ​​the route Pa.

[0059] <Operation of the possession inspection device> 7 is a flow diagram showing an example of the operation flow of the belongings inspection device. When the processor 31 starts the operating system, it controls the screen at the entrance of the display unit 35 to notify the user that entry is prohibited (step S001). Then, the processor 31 starts an inspection program and performs a startup process to initialize each unit (step S002). This startup process includes, for example, checking the rotation speed of the motors (not shown) in the sensor unit U1 of the mobile detector 1 and the sensor unit U2 of the fixed detector 2, and performing calibration.

[0060] Processor 31 determines whether an abnormality has occurred in the startup process (step S003). If it is determined that an abnormality has occurred (step S003; YES), processor 31 notifies the abnormality via display unit 35 (step S004) and ends the process.

[0061] On the other hand, if it is determined that no abnormality has occurred (step S003; NO), processor 31 notifies permission to pass via the screen at the entrance described above (step S005) and executes the primary inspection process (step S100).

[0062] 8 is a flow diagram showing an example of the operational flow of the primary inspection process. Based on information acquired from the entrance / exit detector 4, the processor 31 determines whether the entrance / exit detector 4 has detected the entry of person Q (step S101). While it is determined that the entrance / exit detector 4 has not detected the entry of person Q (step S101; NO), the processor 31 continues this determination.

[0063] On the other hand, if the entry / exit detector 4 determines that it has detected the entry of person Q (step S101; YES), the processor 31 notifies the person that entry is prohibited on the display screen at the entrance of the display unit 35 (step S102), and uses the mobile detector 1 and fixed detector 2 to scan for person Q entering path Pa and walking along path Pa (step S103).

[0064] Then, the processor 31 generates an image based on the intensity signals for each receiving direction of the electromagnetic waves obtained by scanning (step S104), and analyzes this image to determine whether person Q is suspected of possessing a dangerous item (step S105).

[0065] The first inspection inspects person Q who is walking, i.e., moving, along path Pa. During this first inspection, movement detector 1 does not move. In other words, this possession inspection device 9 is an example of a possession inspection device that does not move any of the multiple detectors while the person being inspected is moving along the path.

[0066] If it is determined that person Q is not suspected of possessing a dangerous item (step S105; NO), processor 31 guides person Q to exit (step S106) and determines whether entry / exit detector 4 has detected person Q's exit (step S107).

[0067] While it is determined that the entrance / exit detector 4 has not detected the exit of person Q (step S107; NO), the processor 31 returns the process to step S106.

[0068] On the other hand, if it is determined that the entrance / exit detector 4 has detected the exit of person Q (step S107; YES), the processor 31 causes the display screen at the entrance to notify the person Q that they have been permitted to pass (step S108), and ends the process.

[0069] In step S105, if it is determined that person Q is suspected of possessing a dangerous substance (step S105; YES), processor 31 causes display unit 35 to issue a warning that person Q is suspected of possessing a dangerous substance (step S109).

[0070] Then, processor 31 determines whether or not a secondary inspection is necessary (step S110). If it is determined that a secondary inspection is necessary (step S110; YES), processor 31 executes the secondary inspection process (step S200). On the other hand, if it is determined that a secondary inspection is not necessary (step S110; NO), processor 31 ends the process without executing step S200.

[0071] 9 is a flow diagram showing an example of the operation flow of the secondary inspection process. The processor 31 controls the movement detector 1 via the interface 33 to rotate its wave receiving direction (step S201).

[0072] Fig. 10 is a diagram showing a movement detector 1 rotating its wave receiving direction. Fig. 10 shows a top view of the configuration of a personal belongings inspection device 9. Each movement detector 1 in Fig. 10 rotates in the direction of arrow M1 under the control of an information processing device 3 (not shown). This rotation is achieved by a movement unit 14 of the movement detector 1. Due to this rotation, the propagation path D, which is the wave receiving direction of the movement detector 1, is oriented along the X-axis direction.

[0073] When the wave receiving direction of the movement detector 1 is rotated, the processor 31 guides the person Q, who is the subject of inspection, to assume a first posture, as shown in Fig. 9 (step S202). Here, the first posture refers to the first posture of the person Q who stopped in the secondary inspection process, and is, for example, an upright position with the front of the body facing the direction of travel of the path Pa. Guidance of the posture may be performed, for example, by a speaker (not shown) that outputs sound under the control of the information processing device 3. Furthermore, guidance of the posture may be performed by displaying on the liquid crystal screen of the display unit 35.

[0074] After guiding person Q to the first posture, processor 31 determines whether or not the first posture of person Q has been confirmed (step S203). This confirmation may be performed by analyzing an image from a surveillance camera, or may be performed by an operator of belongings inspection device 9.

[0075] While it is determined that the first posture of person Q has not been confirmed (step S203; NO), processor 31 continues this determination. On the other hand, when it is determined that the first posture of person Q has been confirmed (step S203; YES), processor 31 moves movement detector 1 in the forward direction to perform scanning (step S204).

[0076] Fig. 11 is a diagram showing a mobile sensor 1 moving in a forward direction. Here, the forward direction is the direction approaching the position of the fixed sensor 2. In the example shown in Fig. 11, the forward direction is the -Y direction. The mobile sensors 1, one on each side of the path Pa, receive electromagnetic waves along the propagation path D while moving straight in the forward direction, indicated by arrow M2, under the control of the information processing device 3.

[0077] At this time, person Q is stationary while maintaining a first posture with the front of his or her body facing along the direction of travel of path Pa (+Y direction). The motion detector 1, which moves in the forward direction to scan person Q, receives electromagnetic waves through propagation path D along a direction perpendicular to the direction of travel of path Pa. While moving in the forward direction, the motion detector 1 maintains its wave receiving direction. Therefore, the motion detector 1 generates an image based on electromagnetic waves emitted from the side of person Q.

[0078] In other words, the personal belongings inspection device 9 having this mobile sensor 1 is an example of a personal belongings inspection device that inspects the personal belongings of the person being inspected by moving at least one of multiple sensors that detect electromagnetic waves while maintaining the receiving direction.

[0079] Furthermore, the movement detectors 1 placed on the left and right sides are positioned on either side of a path Pa, on which a person Q is located. Therefore, these two movement detectors 1 move simultaneously, sandwiching the person Q, who is the subject of inspection, between them.

[0080] In other words, the personal belongings inspection device 9 having this mobile detector 1 is an example of a personal belongings inspection device that moves at least two of the multiple detectors that sandwich the person being inspected. Also, the personal belongings inspection device 9 having this mobile detector 1 is an example of a personal belongings inspection device that moves two detectors simultaneously.

[0081] When the movement detector 1 is moved in the forward direction, the processor 31 guides the person Q, who is the subject of inspection, to assume a second posture (step S205), as shown in Fig. 9. Here, the second posture is the second posture of the person Q who is stopped in the secondary inspection process, and is, for example, a standing position with the front of the body facing perpendicular to the traveling direction of the path Pa.

[0082] After guiding person Q to the second posture, processor 31 determines whether or not the second posture of person Q has been confirmed (step S206). This confirmation may be performed by analyzing an image from a surveillance camera, or may be performed by an operator of belongings inspection device 9.

[0083] The processor 31 continues this determination while determining that the second posture of person Q has not been confirmed (step S206; NO). On the other hand, when determining that the second posture of person Q has been confirmed (step S206; YES), the processor 31 moves the movement detector 1 in the opposite direction to perform scanning (step S207).

[0084] Fig. 12 is a diagram showing the mobile sensor 1 moving in the reverse direction. Here, the reverse direction is the opposite direction to the forward direction, and is the direction moving away from the position of the fixed sensor 2. In the example shown in Fig. 12, the reverse direction is the +Y direction.

[0085] 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 moves straight in the opposite direction, that is, in the direction of arrow M3, and receives electromagnetic waves along the propagation path D.

[0086] At this time, person Q is stopped while maintaining a second posture in which the front of his or her body faces in a direction perpendicular to the traveling direction (+Y direction) of path Pa. Then, the motion detector 1, which moves in the opposite direction to scan person Q, receives electromagnetic waves through propagation path D along a direction perpendicular to the traveling direction of path Pa. While moving in the opposite direction, the motion detector 1 maintains its wave receiving direction. Therefore, the motion detector 1 generates an image based on electromagnetic waves emitted from the front and back directions of person Q.

[0087] When the motion detector 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 motion detector 1 to return its wave receiving direction to its original direction (step S208), as shown in Fig. 9. At this time, the motion detector 1 rotates in the opposite direction to the arrow M1 shown in Fig. 10 and returns to its original position.

[0088] The processor 31 analyzes the image of the person Q observed from the side, which is generated when the movement detector 1 is moved in the forward direction. The processor 31 also analyzes the images of the person Q observed from the front and back, which are generated when the movement detector 1 is moved in the reverse direction (step S209).

[0089] Then, processor 31 identifies the shape of the belongings based on the results of the image analysis. Processor 31, for example, refers to a database that stores the shapes of dangerous objects stored in memory 32, and calculates the degree of match between the identified shape and the shapes of dangerous objects stored in advance (step S210).

[0090] Processor 31 determines whether person Q is suspected of possessing a dangerous substance based on the calculated degree of coincidence (step S211).

[0091] Here, during the secondary inspection, person Q, who is the subject of inspection, remains stationary while maintaining the first or second posture as instructed. At this time, this possession inspection device 9 moves two movement detectors 1 to receive electromagnetic waves emitted from person Q. In other words, this possession inspection device 9 is an example of a possession inspection device that moves at least one of multiple detectors while the subject of inspection is stationary.

[0092] Furthermore, in the secondary inspection of this embodiment, the forward and reverse directions in which the moving detector 1 moves are both along the path Pa. In other words, this possession inspection device 9 is an example of a possession inspection device that moves the detector along the path when the detector is moved.

[0093] When it is determined that person Q is suspected of possessing a dangerous substance (step S211; YES), processor 31 issues a warning on display unit 35 (step S212) and ends the process.

[0094] On the other hand, when it is determined that person Q is not suspected of possessing a dangerous substance (step S211; NO), processor 31 guides person Q to exit (step S213). Then, processor 31 determines whether entrance / exit detector 4 has detected the exit of person Q (step S214).

[0095] While it is determined that the entrance / exit detector 4 has not detected the exit of person Q (step S214; NO), the processor 31 returns the process to step S213.

[0096] On the other hand, if it is determined that the entrance / exit detector 4 has detected the exit of person Q (step S214; YES), the processor 31 causes the display screen at the entrance to notify the person Q of permission to pass (step S215), and ends the process.

[0097] By performing the operations described above, the possessions inspection device 9 uses the motion detector 1 used for the primary inspection for the secondary inspection as well, so there is no need to provide separate space or equipment for the secondary inspection.

[0098] The configurations, shapes, sizes, and layout relationships described in the above embodiments are merely schematic illustrations to enable understanding and implementation of the present invention. Therefore, the present invention is not limited to the described embodiments, and can be modified in various forms without departing from the scope of the technical ideas set forth in the claims.

[0099] <Modification> The above is a description of the embodiment, but the contents of this embodiment can be modified as follows. In addition, the following modifications can be combined.

[0100] <1> In the above-described embodiment, the moving unit 14 was able to rotate the movement detector 1 in addition to moving it linearly, but the moving unit 14 may simply move the movement detector 1 linearly. In this case, the movement detector 1 may have a rotating unit 15 that rotates its own sensor unit U1 around an axis parallel to the z-axis.

[0101] Fig. 13 is a diagram showing an example of a movement detector 1 having a rotation unit 15. In the movement detector 1 shown in Fig. 13, the rotation unit 15 is mounted on a movement unit 14 including a motor and tires, and a housing containing the sensor unit U1 of the movement detector 1 is mounted on top of that. The rotation unit 15 is a turntable having an axis parallel to the z-axis, and can rotate the upper housing relative to the lower movement unit 14 under the control of the information processing device 3. In this case as well, the wave receiving direction of the movement detector 1 rotates.

[0102] In this modified example, the moving unit 14 may include, for example, wheels that move along rails, since it is not necessary to change the wave receiving direction of the motion sensor 1. The moving unit 14 may also include a pinion in a rack-and-pinion mechanism. In this case, the rail or rack on which the motion sensor 1 rides via the above-mentioned wheels or pinion may be provided along the path Pa.

[0103] Furthermore, in this modified example, the rotating unit 15 is mounted on the moving unit 14, so the wave receiving direction of the movement detector 1 can be rotated even if the moving unit 14 does not move. Therefore, this possession inspection device 9 is an example of a possession inspection device that, when moving the detector, changes the wave receiving direction before starting the movement and maintains the changed wave receiving direction while moving.

[0104] <2> In the above-described embodiment, the possession inspection device 9 changes the wave receiving direction of the movement detector 1 by rotating the movement detector 1, and then moves the movement detector 1 in a straight line. However, the possession inspection device 9 does not have to change the wave receiving direction of the movement detector 1 before moving the movement detector 1 in a straight line.

[0105] Fig. 14 is a diagram showing the movement of the mobile sensors 1 in the modified example. The mobile sensors 1 shown in Fig. 14 are arranged one on the front right side and one on the back left side of the path Pa. The fixed sensors 2 shown in Fig. 14 are arranged one on the front left side and one on the back right side of the path Pa.

[0106] When starting the secondary inspection, the belongings inspection device 9 shown in Fig. 14 prompts the person Q, who is the subject of inspection, to assume a third posture. This third posture is, for example, facing diagonally 45 degrees to the left with respect to the path Pa.

[0107] The possessions inspection device 9 then moves the two motion detectors 1 back and forth in a straight line along the direction of arrow M4, which is 45 degrees diagonal to the right of the path Pa, toward person Q who is in the third position. During this back and forth movement, the motion detectors 1 receive electromagnetic waves via propagation path D and generate an image based on these electromagnetic waves. In this case, the wave receiving direction of the motion detectors 1 during the secondary inspection remains unchanged from that during the primary inspection. Even with this configuration, the motion detectors 1 can inspect possessions regardless of whether the person being inspected is moving or stationary. [Explanation of symbols]

[0108] 1...moving detector, 10...polygon mirror, 11...radome, 12...condensing mirror, 13...sensor, 14...moving part, 15...rotating part, 2...fixed detector, 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...personal possession inspection device, U1, U2...sensor unit

Claims

1. A device having a plurality of sensors that detect electromagnetic waves emitted from a person to be inspected, When the subject is moving along a path, none of the plurality of sensors is moved, A personal belongings inspection device that inspects the personal belongings of the person being inspected by moving at least one of the plurality of sensors while maintaining the receiving direction when the person being inspected is stationary.

2. When the detectors are moved, at least two of the detectors that sandwich the subject are moved. The possession inspection device according to claim 1.

3. When the detectors are moved, two of the detectors are moved simultaneously. The possession inspection device according to claim 2.

4. When the sensor is moved, the sensor is moved along the path. The personal belongings inspection device according to any one of claims 1 to 3.

5. When the detector is moved, it starts moving after changing the wave receiving direction, and maintains the changed wave receiving direction during the movement. The personal belongings inspection device according to any one of claims 1 to 4.

6. When the sensor is moved, After confirming that the subject has taken a first posture, the detector is moved in a first direction; After confirming that the stopped test subject has a second posture different from the first posture, the sensor is moved in a second direction different from the first direction. The personal belongings inspection device according to any one of claims 1 to 5.

Images