Security Inspection System

Abstract

To provide a security inspection system with high throughput and high accuracy.SOLUTION: A security inspection system according to an embodiment comprises: an inspection device which uses radio waves for inspecting whether or not a subject owns a prescribed object; and a control device connected to a passage management device for performing determination regarding whether or not the subject has permission to pass. The control device transmits a second signal to the inspection device in response to receiving, from the passage management device, a first signal indicating the start of the determination. The inspection device starts the inspection in response to receiving the second signal.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] FIELD OF THE INVENTION An embodiment of the present invention relates to a security inspection system and a security inspection method. [Background technology]

[0002] A security inspection system has been developed that determines whether a person being inspected is carrying dangerous goods. One example of this system uses radio waves. A transmitting circuit irradiates the object to be inspected with radio waves from a transmitting antenna. A receiving circuit receives the reflected waves from the object to be inspected with a receiving antenna. The receiving circuit is connected to a signal processing circuit. The signal processing circuit processes the received signal to detect dangerous goods.

[0003] Examples of locations where this system is installed include near gates where many pedestrians pass through, such as stations, amusement parks, concert halls, and buildings. It is difficult to get pedestrians to stop for inspection, so a walk-through type system has been developed that irradiates radio waves on moving pedestrians.

[0004] This system does not require the test object to remain stationary during testing, and can test a large number of test objects per unit time, resulting in high throughput. Test accuracy depends on the number of antennas. If the number of antennas is increased to improve testing accuracy, passersby will move through a wide testing area covered by many antennas, which can cause fluctuations in the position of passersby during the testing period and degrade testing accuracy. On the other hand, if the number of antennas is reduced, radio waves cannot be irradiated over the entire body of the passerby, and some areas of the passerby may not be tested. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] US Patent Application Publication No. 2016 / 0291148 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a security inspection system with high throughput and high accuracy. [Means for solving the problem]

[0007] The security inspection system according to the embodiment includes: Using radio waves Whether the subject possesses the specified item Inspect and a traffic management device that determines whether the subject has the right of passage. and the traffic management device. and a control device connected to the the traffic management device includes a sensor that detects a non-contact medium having right information used to determine whether the subject person has a right of passage, and when the sensor detects the non-contact medium, starts the determination and transmits the first signal; When the control device receives a first signal indicating that the determination has started from the traffic management device, the control device transmits a second signal to the inspection device, and when the inspection device receives the second signal, the inspection device starts the inspection. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a block circuit diagram for explaining an example of the circuit configuration of a security inspection system according to a first embodiment. [Figure 2] FIG. 1 is a perspective view illustrating an example of the layout of a security inspection system according to a first embodiment. [Figure 3] 4 is a flowchart for explaining an example of processing by the traffic management device according to the first embodiment. [Figure 4] 5 is a flowchart for explaining an example of processing performed by the radar device according to the first embodiment. [Figure 5] 5 is a flowchart illustrating an example of processing by the control device according to the first embodiment. [Figure 6] FIG. 2 is a plan view for explaining an example of the operation of the security inspection system according to the first embodiment. [Figure 7] 4 is a sequence chart illustrating an example of the relationship between the operations of the traffic management device, the control device, and the radar device according to the first embodiment. [Figure 8]4 is a table for explaining an example of first to fourth processes performed by the control device according to the first embodiment. [Figure 9] 3 is a diagram for explaining an example of data stored in a database according to the first embodiment. [Figure 10] FIG. 10 is a block circuit diagram for explaining an example of a circuit configuration of a traffic control device according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments will be described with reference to the drawings. The following description exemplifies devices and methods for embodying the technical concepts of the embodiments. The technical concepts of the embodiments are not limited to the structures, shapes, arrangements, materials, etc. of the components described below. Modifications that can be easily conceived by those skilled in the art are naturally included within the scope of the disclosure. For clarity of explanation, the drawings may schematically depict elements with different sizes, thicknesses, planar dimensions, shapes, etc., compared to the actual embodiment. Elements with different dimensional relationships or ratios may be included in multiple drawings. Corresponding elements may be designated by the same reference numerals in multiple drawings, and redundant description may be omitted. Some elements may be designated by multiple names, but these designations are merely examples and do not necessarily mean that these elements may be designated by other names. Furthermore, elements that do not have multiple names may also be designated by other names. In the following description, "connection" may include not only direct connection but also connection via other elements.

[0010] Hereinafter, the present embodiment will be described in detail with reference to the drawings.

[0011] First embodiment 1 is a diagram illustrating an example of a security inspection system according to a first embodiment. The security inspection system is installed at the entrances of facilities where many people gather, such as train stations, bus terminals, airports, shopping malls, concert halls, exhibition halls, and buildings. The security inspection system manages whether or not a person to be inspected is permitted to pass through the entrance gate of the facility or to enter the facility.

[0012] The security inspection system includes a radar device 20, a traffic control device 30, a control device 40, a display device 50, a communication device 60, and a database (DB) 70.

[0013] The radar device 20 is an inspection device that irradiates a passing inspection target 10 with radio waves and determines whether the inspection target 10 is carrying a predetermined object. The predetermined object is, for example, a so-called dangerous object that is not permitted to be brought into these facilities. Examples of dangerous objects are metal objects such as handguns and knives, powders such as explosives, and liquids such as gasoline. Examples of dangerous objects may also include powders such as narcotics and illegally brought-in items such as gold bars.

[0014] An example of radio waves is radio waves with wavelengths of 1 millimeter to 1 centimeter (frequency of 30 GHz to 300 GHz), also known as millimeter waves. Another example of radio waves is radio waves with wavelengths of 100 micrometers to 1 millimeter (frequency of 300 GHz to 3 THz), also known as submillimeter waves or terahertz waves.

[0015] These radio waves are reflected by the skin of the subject 10. They are also reflected by metal objects such as guns and knives. The reflectivity of metal is higher than that of skin. The intensity of the waves reflected by metal is higher than that of skin. These radio waves are also absorbed by powder such as explosives. The reflectivity of powder is lower than that of skin. The intensity of the reflected waves is determined by the type of material at the point where the radio waves are reflected, such as skin, metal, or powder. The radar device 20 can determine the type of material at the reflection point from the intensity of the reflected waves and can inspect the person's belongings. Note that the radar device can be replaced with other inspection devices that can use radio waves to inspect whether the subject is carrying a specified item. Examples of other inspection devices include X-ray inspection devices and metal detectors.

[0016] The radar device 20 includes a transmitting / receiving unit 202, a data collecting unit 204, a signal processing unit 206, and a determining unit 208. The transmitting / receiving unit 202 irradiates the inspection object 10 with radio waves and receives reflected waves from the inspection object 10.

[0017] The transmitter / receiver unit 202 includes multiple transmitting antennas, multiple receiving antennas, a transmitting circuit, and a receiving circuit. When the transmitting circuit receives a trigger signal from the control device 40, it selects one of the multiple transmitting antennas and irradiates a predetermined area of ​​the inspection object 10 with radio waves from the selected transmitting antenna. The radar's radio wave irradiation range is called the inspection area. The control device 40 transmits a trigger signal when the inspection object 10 is located in the inspection area. Therefore, the radar device irradiates radio waves when the inspection object 10 is located in the inspection area. The radar device 20 does not need to constantly irradiate radio waves, which prevents unnecessary power consumption.

[0018] The transmitting / receiving unit 202 sequentially switches the transmitting antennas that emit radio waves. The transmitting / receiving unit 202 emits radio waves from one transmitting antenna, receives reflected waves simultaneously with multiple receiving antennas, and transmits the received signals to the data collecting unit 204.

[0019] The data collection unit 204 performs A / D conversion on the received signal and stores the received signal as a digital signal.

[0020] The data collection unit 204 transmits the digital received signal to the signal processing unit 206 .

[0021] The signal processing unit 206 performs imaging processing on the digital received signal using amplitude information and phase information of the digital received signal, and generates an image of the inspection target 10. This image includes information about the possessions of the inspection target 10.

[0022] The signal processing unit 206 transmits the image signal to the determination unit 208. The determination unit 208 determines whether or not the inspection target 10 is carrying a predetermined object by performing threshold value determination on the image signal. The determination unit 208 may determine whether or not the inspection target 10 is carrying a predetermined object by using machine learning or deep learning of the image signal. The determination unit 208 transmits a first determination signal indicating the determination result regarding the presence or absence of the predetermined object to the control device 40.

[0023] The passage management device 30 includes a non-contact medium sensor 302 , a determination unit 304 , a door 306 , a door opening / closing unit 308 , a gate 310 , a gate opening / closing unit 312 , an inspection target sensor 314 , and a selection unit 316 .

[0024] The contactless medium sensor 302 detects the approach of a contactless medium 320. Examples of the contactless medium 320 include a contactless IC card and a smartphone with a short-range communication function. Examples of short-range communication are NFC and Bluetooth (registered trademark). The contactless medium 320 can be a medium generally used for entrance / exit management and passage management, such as a station ticket gate or employee ID card.

[0025] When the inspection target 10 passes by and comes to the position of the non-contact medium sensor 302 , the inspection target 10 takes out the non-contact medium 320 from a pocket, bag, or the like, and holds the non-contact medium 320 over the non-contact medium sensor 302 .

[0026] When the non-contact medium sensor 302 detects the non-contact medium 320, it reads authentication information from the non-contact medium 320, transmits the read information to the determination unit 304, and also transmits a detection signal indicating detection to the control device 40.

[0027] If the contactless medium 320 is a smartphone, the authentication information is represented by a QR code (registered trademark) or a barcode displayed by an application. The authentication information includes identification information unique to the contactless medium, the user's name, address, gender, age, and rights information. The rights information is information regarding the right of passage of the user of the contactless medium 320.

[0028] In the case of a transportation-related security inspection system installed at ticket gates at stations, bus terminals, etc., the right of passage is a valid train ticket, reserved seat ticket, etc. When a train ticket, reserved seat ticket, etc. is purchased, right information including service usage information (travel section, etc.), expiration date, seat information, seat purchase information, etc. is written to the contactless medium 320. The contactless medium 320 may store the inspection results by the security inspection system. Other examples of right information are amusement park admission ticket information and employee ID card information.

[0029] When the determination unit 304 receives the authentication information from the non-contact medium 320, it begins authenticating whether the inspection target 10 is a legitimate user. That is, the determination unit 304 begins determining whether the inspection target 10 has the right of passage for this passage. For example, if the right information includes the correct boarding section, seat information, and seat purchase information but the expiration date has expired, the determination unit 304 determines that the inspection target 10 does not have the right of passage. The determination unit 304 transmits the authentication information and a second determination signal indicating the determination result regarding the presence or absence of the right of passage to the control device 40. The determination unit 304 also transmits the second determination signal to the non-contact medium sensor 302. The non-contact medium sensor 302 may write the determination result to the non-contact medium 320.

[0030] When the non-contact medium sensor 302 detects the approach of the non-contact medium 320, the detection signal sent by the non-contact medium sensor 302 to the control device 40 also indicates that the determination unit 304 has started making a determination. In other words, when the control device 40 receives the detection signal, it determines that the determination unit 304 has started making a determination.

[0031] When the control device 40 receives the detection signal, it transmits a trigger signal to the transmitter / receiver 202. When the inspection object 10 holds the non-contact medium 320 over the non-contact medium sensor 302, there is a high possibility that the inspection object 10 will significantly slow down its traveling speed or stop for a moment. Therefore, there is no deviation in the position of the inspection object 10 during the period of transmission and reception of radio waves. This allows the number of antennas to be increased so that the entire area of ​​the inspection object 10 can be covered, making it possible to perform highly accurate inspections. Furthermore, the inspection object does not need to be stationary for inspection, resulting in high inspection throughput.

[0032] The non-contact medium sensor 302 includes a plurality of sensor elements of different heights. The inspection object sensor 314 detects the height of the inspection object 10 standing still in front of the gate 301 when the gate 301 is closed.

[0033] The selection unit 316 selects a part of the plurality of sensor elements that make up the non-contact medium sensor 302, for example, one sensor element, in accordance with the output signal of the test target sensor 314.

[0034] The selection unit 316 may select a sensor element at shoulder height of the inspection target 10. In this case, even if the inspection target 10 and the non-contact medium sensor 302 are close to each other, the inspection target 10 must raise their arm when holding the non-contact medium 320 over the non-contact medium sensor 302. Therefore, the inspection target 10 cannot hold the non-contact medium 320 over the non-contact medium sensor 302 while holding a hazardous object under their arm. If the non-contact medium sensor 302 does not detect the non-contact medium 320, the radar device 20 does not start emitting radio waves, and therefore the inspection does not start.

[0035] Gate 310 is installed at the entrance to the inspection area. Gate opening / closing unit 312 is connected to gate 310. Gate opening / closing unit 312 receives signals from door opening / closing unit 308 and inspection object sensor 314. Gate 310 regulates the entrance of inspection object 10 to the inspection area. Instead of providing gate 310, a display unit may be installed at the entrance to the inspection area, and text permitting entry to the inspection area may be displayed on the display unit.

[0036] The door 306 is installed at the exit of the inspection area. A door opening / closing unit 308 is connected to the door 306. The door opening / closing unit 308 receives a door control signal from the control device 40. The door opening / closing unit 308 opens and closes the door 306 in response to the door control signal. The door 306 regulates the inspection target 10's entry into the facility or passage through the entrance gate. Instead of providing the door 306, text permitting entry into the facility may be displayed on the display device 50. The display device 50 is installed near the exit of the inspection area. The door 306 may be, for example, a flap type or a sliding panel type door, and the door 306 may be replaced with, for example, a rotating bar.

[0037] The control device 40 determines whether to allow the inspection target 10 to pass based on the first and second determination signals. The control device 40 transmits a door control signal corresponding to the determination result to the door opening / closing unit 308. The control device 40 transmits a display control signal indicating the determination result to the display device 50. The display device 50 includes a display for displaying text and a speaker for outputting the determination result as voice or issuing a warning. The control device 40 transmits a communication control signal corresponding to the determination result to the communication device 60. The communication device 60 reports the determination result to at least one of multiple types of electronic devices. Multiple types of electronic devices are managed by multiple administrators with different public security levels. In the case of a traffic-related security inspection system, examples of multiple administrators with different public security levels include security guards, station staff, and police officers. Police officers have the highest public security level, and security guards have the lowest public security level. In other words, the communication device 60 transmits the determination result to a reporting destination corresponding to multiple levels (public security levels) classified based on the first and second determination signals. The level is higher when the inspection target is carrying a specified item. Furthermore, the level is higher when the subject of inspection does not have the right of passage. The communication control signal indicates the administrator to whom the notification is to be sent. The control device 40 transmits integrated information according to the judgment result to the database 70. The database 70 stores the integrated information for each user ID of the subject of inspection.

[0038] The control device 40 may be realized by a CPU that executes a security inspection program, or may be realized by a circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).

[0039] 1 shows the radar device 20, the traffic management device 30, and the control device 40 as separate devices, but the configurations of the radar device 20, the traffic management device 30, and the control device 40 are not limited to this. For example, the traffic management device 30 may be arranged in the same housing as the control device 40, and the control device 40 may be configured to include the traffic management device 30.

[0040] 2 is a perspective view illustrating an example of the arrangement of the security inspection system according to the first embodiment. Two antenna panels 212, each with a parallel central portion, are arranged on either side of the entrance passage to the facility. One antenna panel 212 may be arranged on one side of the entrance passage to the facility. Alternatively, one antenna panel 212 may be arranged on the ceiling or floor of the entrance passage to the facility.

[0041] The antenna panel 212 includes a large number of antennas 214 arranged in a two-dimensional array. An example of the shape of the antenna panel 212 is rectangular. One side on the front side and one side on the back side of the antenna panel 212 are bent toward the center of the antenna panel 212. This allows radio waves from the antenna panel 212 to be efficiently irradiated onto the inspection object 10 located in the center of the inspection area.

[0042] For convenience of illustration, the number of antennas 214 is shown as small, but in reality, a plurality of antennas 214 are arranged. The arrangement of the antennas 214 is not limited to two dimensions, but may be linear. The antenna 214 may be configured as a dual-purpose antenna, or may be configured as separate transmitting and receiving antennas. When the transmitting and receiving antennas are arranged linearly, the arrangement directions of the transmitting and receiving antennas may be different.

[0043] The antenna panel 212 has a non-contact medium sensor 302 in its center. The non-contact medium sensor 302 is installed within the radar's irradiation range. The radar's radio wave irradiation range is the range irradiated by radio waves transmitted by the antennas that make up the radar. When multiple antennas are installed, the radio wave irradiation range includes each of the ranges irradiated by the radio waves transmitted by the multiple antennas. When antenna panels are installed opposite each other, the radio wave irradiation range includes the area sandwiched between the antenna panels. The non-contact medium sensor 302 is composed of multiple (here, three) sensor elements 302a, 302b, and 302c. The sensor elements 302a, 302b, and 302c are arranged vertically in a row at different heights. Depending on the height of the test subject 10, some of the sensor elements, for example, any of the sensor elements 302a, 302b, and 302c, are selected. Only the selected sensor elements 302a, 302b, and 302c are activated to detect the non-contact medium 320.

[0044] The gate 301 is installed in front of the antenna panel 212 .

[0045] Inspection object sensor 314 is installed in front of gate 301. Inspection object sensor 314 includes a plurality of sensor elements arranged in a vertical line at different heights. Inspection object sensor 314 detects the height of inspection object 10 depending on which sensor element detects inspection object 10.

[0046] The door 306 is installed on the rear side of the antenna panel 212 .

[0047] The display device 50 is installed near the door 306 so that the inspection subject 10 standing in front of the door 306 can see the screen. The display device 50 displays the judgment result. If the inspection subject 10 is not permitted to pass, the inspection subject 10 can know the reason.

[0048] Fig. 3 is a flowchart for explaining an example of processing by the traffic control device 30 according to the first embodiment. Fig. 4 is a flowchart for explaining an example of processing by the radar device 20 according to the first embodiment. Fig. 5 is a flowchart for explaining an example of processing by the control device 40 according to the first embodiment. Fig. 6 is a plan view for explaining an example of operation of the security inspection system according to the first embodiment.

[0049] In the processing of the traffic control device 30 shown in Fig. 3, when the system is powered on, the gate 310 and the door 306 are closed. A passage is formed so that the inspection subject 10 undergoes inspection by the security inspection system before entering the facility. When the inspection subject 10 reaches the entrance to the inspection area, it waits in front of the closed gate 310. Fig. 6(a) shows the state in which the inspection subject 10 waits in front of the gate 310.

[0050] The inspection object sensor 314 determines whether or not an inspection object 10 is present in front of the inspection area (gate) (S302). If the inspection object sensor 314 detects an inspection object 10 in front of the inspection area (S302; Yes), the gate opening / closing unit 312 opens the gate 310 (S304). The gate opening / closing unit 312 closes the gate 310 after a certain time has elapsed since opening the gate 310. This prevents multiple inspection objects 10 from being present in the inspection area at the same time. The inspection object sensor 314 detects the presence of the inspection object 10 (S302) and also detects the height of the inspection object 10.

[0051] The selection unit 316 selects one of the non-contact medium sensors 302a, 302b, or 302c according to the height of the test subject 10 detected by the test subject sensor 314 (S306). The non-contact medium sensors 302a, 302b, or 302c are equipped with LED lamps, and the LED lamp corresponding to the selected non-contact medium sensor 302a, 302b, or 302c is illuminated. Alternatively, a character representing the selected non-contact medium sensor 302a, 302b, or 302c may be displayed on a display device. Furthermore, a voice synthesis circuit may be provided to notify the test subject 10 by voice that the selected non-contact medium sensor 302a, 302b, or 302c is the top, center, or bottom. This allows the test subject 10 to know which non-contact medium sensor 302a, 302b, or 302c to hold the non-contact medium 320 over.

[0052] The test object 10 holds the non-contact medium 320 over the selected non-contact medium sensor 302a, 302b, or 302c. The non-contact medium sensor 302 determines whether the non-contact medium 320 has been contacted (S308). If the non-contact medium sensor 302 detects the non-contact medium 320 (S308; Yes), it transmits a detection signal to the control device 40 (S310).

[0053] The non-contact medium sensor 302 reads the authentication information from the non-contact medium 320 and transmits the read information to the determination unit 304 (S312).

[0054] The determination unit 304 starts determining whether the inspection object 10 has the right to pass based on the authentication information, and transmits a first determination signal indicating the determination result to the control device 40 (S314).

[0055] The door opening / closing unit 308 determines whether or not a door control signal instructing the door to be opened has been received from the control device 40 (S316).

[0056] When the door opening / closing unit 308 receives a door control signal from the control device 40 instructing to open the door (S316; Yes), it opens the door 306 (S318). Fig. 6(c) shows the state in which the door 306 is opened (S318).

[0057] In the processing of the radar device 20 shown in FIG. 4, when the system is powered on, the transceiver 202 determines whether or not a trigger signal has been received from the control device 40 (S202). If the transceiver 202 receives a trigger signal from the control device 40 (S202; Yes), it selects one transmitting antenna and radiates radio waves from the transmitting antenna (S204). The reflected waves are received by all receiving antennas. FIG. 6(b) shows a state in which one transmitting antenna radiates radio waves and all receiving antennas receive the reflected waves (S204). At this time, the inspection object 10 holds the non-contact medium 320 over the non-contact medium sensor 302 in the center of the antenna panel 212, so that the radio waves are radiated to the entire area of ​​the inspection object 10.

[0058] The data collection unit 204 A / D converts the received signals from all the receiving antennas and stores the received signals as digital signals (S206). When the transceiver unit 202 and the data collection unit 204 have completed data collection of the reflected waves of the radio waves from one transmitting antenna, they select another transmitting antenna and repeat the processes of S204 and S206 until radio waves are radiated from all the transmitting antennas.

[0059] The signal processing unit 206 performs imaging processing on the received digital signal to generate an image of the inspection object 10 (S208).

[0060] The determination unit 208 determines whether or not the inspection target 10 is carrying a dangerous substance based on the image signal, and transmits a second determination signal indicating the determination result to the control device 40 (S210).

[0061] 5, when the control device 40 is powered on, the control device 40 determines whether or not a detection signal has been received from the traffic management device 30 (S402). If the control device 40 has received a detection signal (S402; Yes), the control device 40 transmits a trigger signal to the radar device 20 (S404).

[0062] The control device 40 determines whether or not the first determination signal has been received from the traffic control device 30 (S406).

[0063] When the control device 40 receives the first determination signal (S406; Yes), the control device 40 determines whether or not the control device 40 has received a second determination signal from the radar device 20 (S408).

[0064] When the control device 40 receives the second determination signal (S408; Yes), it determines whether or not to permit the inspection object 10 to pass, based on the first determination signal and the second determination signal.

[0065] The order of the reception determination of the first determination signal (S406) and the reception determination of the second determination signal (S408) may be reversed from that shown in FIG.

[0066] First, the control device 40 determines whether the inspection object 10 has the right to pass based on the first determination signal (S410).

[0067] When the control device 40 determines that the inspection target 10 has the right to pass (S410; Yes), it determines whether or not the inspection target 10 is carrying a dangerous object based on the second determination signal (S412).

[0068] When the control device 40 determines that the inspection target 10 does not possess any dangerous goods (S412; No), the control device 40 executes a first process (S414).

[0069] When the control device 40 determines that the inspection object 10 is in possession of a dangerous substance (S412; Yes), the control device 40 executes a second process (S418).

[0070] When the control device 40 determines that the inspection object 10 does not have the right to pass (S410; No), it determines whether the inspection object 10 is carrying a dangerous object based on the second determination signal (S416).

[0071] When the control device 40 determines that the inspection target 10 does not possess any dangerous goods (S416; No), the control device 40 executes a third process (S420).

[0072] When the control device 40 determines that the inspection object 10 is in possession of a dangerous substance (S416; Yes), the control device 40 executes a fourth process (S418).

[0073] Although the determination based on the first determination signal (S410) is performed first and then the determination based on the second determination signal (S412 and S416) is performed, this may be reversed, i.e., the determination based on the second determination signal may be performed first and then the determination based on the first determination signal.

[0074] FIG. 7 is a sequence chart for explaining an example of the relationship between the operations of the traffic control device 30, the control device 40, and the radar device 20 according to the first embodiment.

[0075] Process #12 in which the traffic control device 30 transmits a detection signal to the control device 40 corresponds to the process of S310 in FIG. 3 and the process of S402 in FIG.

[0076] Processing #14 in which the control device 40 transmits a trigger signal to the radar device 20 in response to receiving the detection signal corresponds to the processing of S202 in FIG. 4 and the processing of S404 in FIG.

[0077] Process #16 in which the traffic control device 30 transmits the first determination signal to the control device 40 corresponds to the process of S314 in FIG. 3 and the process of S406 in FIG.

[0078] Processing #18 in which the radar device 20 transmits the second determination signal to the control device 40 corresponds to the processing of S210 in FIG. 4 and the processing of S408 in FIG.

[0079] The timing of process #16 and process #18 may be reversed from that shown in FIG.

[0080] Process #20 in which the control device 40 transmits a door control signal to the traffic management device 30 corresponds to the process of S414 in FIG. 4 and the process of S316 in FIG.

[0081] FIG. 8 is a diagram illustrating an example of the first process (S414) to the fourth process (S422) according to the first embodiment. FIG. 9 is a diagram illustrating an example of data stored in the database 70 according to the first embodiment. The database 70 stores, for each user ID, integrated information, the cumulative number of determinations of "no right of passage" (hereinafter also referred to as the first determination count), and the cumulative number of determinations of "possession of dangerous substance" (hereinafter also referred to as the second determination count). The door control signal in FIG. 8 is a pass permission signal. If the inspection subject does not have the right of passage, the door control signal indicates that the inspection subject is not permitted to pass. If the inspection subject has the right of passage and is not in possession of a specified object, the door control signal indicates that the inspection subject is permitted to pass. If the inspection subject has the right of passage and is in possession of a specified object, for example, the door control signal indicates that the inspection subject is not permitted to pass. Alternatively, the door control signal indicates that the inspection subject is permitted to pass. If the subject of inspection has the right to pass and is in possession of the specified item, for example, the door control signal allows the subject of inspection to pass and notifies the subject that he or she is in possession of the specified item.

[0082] In the first process (S414) executed when the inspection target 10 has the right to pass and is not carrying any hazardous materials, the control device 40 transmits a door control signal to the door opening / closing unit 308 to instruct the door to open, transmits a display control signal to the display device 50 to display text indicating that the inspection target is permitted to pass, transmits a communication control signal to the communication device 60 indicating that no notification is required, and transmits integrated information indicating that the inspection target is permitted to pass to the database 70. The database 70 stores the integrated information, the first number of determinations, and the second number of determinations for each user ID.

[0083] The user ID of the inspection target 10 in this first process is 0001 (hereinafter simply referred to as user 0001), and it is assumed that user 0001 has not been inspected by the security inspection system in the past. The integrated information "Inspection target is allowed to pass", the first judgment count of 0, and the second judgment count of 0 are written to the database 70 in relation to user 0001.

[0084] In the second process (S418) executed when the inspection target 10 has the right to pass but is carrying a hazardous material, the control device 40 sends a door control signal to the door opening / closing unit 308 to instruct the door to close, sends a display control signal to the display device 50 to display text indicating that passage is prohibited, sends a communication control signal to the communication device 60 to notify a security guard that the inspection target is carrying a hazardous material, and sends integrated information indicating that the inspection target is carrying a hazardous material to the database 70. The security guard is not limited to a human being and may be a robot. The database 70 stores the integrated information, the first determination count, and the second determination count for each user ID.

[0085] Assume that the inspection target 10 of this second process is user 0002, who has not been inspected by the security inspection system in the past. The integrated information "inspection target is possession of dangerous goods", the first inspection count of 0, and the second inspection count of 1 are written to the database 70 in relation to user 0002.

[0086] Assume that the inspection target 10 of this second process is user 0006, who has been inspected by a security inspection system in the past. Assume that the first and second inspection counts for user 0006 stored in database 70 are 1 and 4, respectively. As a result of this second process, the integrated information "inspection target is in possession of dangerous goods", the first inspection count of 1, and the second inspection count of 5 (=4+1) are written to database 70 in association with user 0006.

[0087] The control device 40 may change the content of the second process based on a comparison between the first determination count and the second determination count (which may be the count before or after the update in the current process) and a threshold count.

[0088] For example, if the threshold number of times for the second determination of attempting to board a train while carrying a dangerous substance is five, and the second determination number for user 0006 has reached five, the control device 40 may change the reporting destination from a security guard to a station staff member or a police officer. Security guards have a lower level of public safety than station staff and police officers. Security guards cannot question or apprehend the inspection target 10, and can only watch over the suspicious inspection target 10. Police officers can question or apprehend the inspection target 10.

[0089] In the second process, the gate 310 may be closed to confine the inspection object to the inspection region.

[0090] Alternatively, the display content of the display device 50 may be changed from a simple text indicating whether or not passage is permitted to a detailed text including the integrated information and the number of judgments. To easily change the processing content, the content of the second processing may be changed to the content of the third processing.

[0091] In the third process (S420) that is executed when the subject of inspection 10 does not have the right to pass and is not carrying any dangerous goods, the control device 40 sends a door control signal to the door opening / closing unit 308 to instruct the door to close, sends a display control signal to the display device 50 to display text indicating that passage is prohibited, sends a communication control signal to the communication device 60 indicating that the subject of inspection does not have the right to pass to notify station staff, and sends integrated information to the database 70 indicating that the subject of inspection does not have the right to pass (for example, has attempted to board a train illegally).

[0092] Assume that the inspection target 10 in this third process is user 0003, who has not been inspected by the security inspection system in the past. The integrated information "inspection target does not have right of passage", the first inspection count of 1, and the second inspection count of 0 are written to the database 70 in relation to user 0003.

[0093] Assume that the inspection target 10 in this third process is user 0007, who has been inspected by a security inspection system in the past. Assume that the first and second inspection counts for user 0007 stored in database 70 are 1 and 5, respectively. As a result of this third process, the integrated information "inspection target does not have right of passage", the first inspection count of 2 (= 1 + 1), and the second inspection count of 5 are written to database 70 in association with user 0007.

[0094] The control device 40 may change the content of the third process based on the first determination count and the second determination count.

[0095] For example, in the third process, the gate 310 may be closed to confine the inspection object to the inspection region.

[0096] For example, if the threshold number of first judgments for attempts to board a train without the right of passage is set to 4, and the first judgment number for user 0007 has reached 4, the control device 40 may change the person to whom the report is sent from a station employee to a police officer.

[0097] Alternatively, the display content of the display device 50 may be changed from a simple text indicating whether or not passage is permitted to a detailed text including the integrated information and the number of judgments. To easily change the processing content, the content of the third processing may be changed to the content of the fourth processing.

[0098] In the fourth process (S422) executed when the inspection subject 10 does not have the right to pass and is in possession of a hazardous material, the control device 40 sends a door control signal to the door opening / closing unit 308 to instruct the door to close, sends a display control signal to the display device 50 to display text indicating that passage is prohibited, sends a communication control signal to the communication device 60 indicating that the police should be notified that the inspection subject does not have the right to pass and is in possession of a hazardous material, and sends integrated information to the database 70 indicating that the inspection subject does not have the right to pass and is in possession of a hazardous material.

[0099] The inspection target 10 of this fourth process is user 0004, who has not been inspected by the security inspection system in the past. The integrated information "Inspection target has no right of passage and is carrying dangerous goods", the first inspection count of 1, and the second inspection count of 1 are written to the database 70 in relation to user 0004.

[0100] Assume that the inspection target 10 in this fourth process is user 0008, and that user 0008 has been inspected by a security inspection system in the past. Assume that the first inspection count and second inspection count for user 0008 stored in database 70 are both 1. As a result of this fourth process, the integrated information "inspection target does not have right of passage and is carrying dangerous goods", the first inspection count 2 (= 1 + 1), and the second inspection count 2 (= 1 + 1) are written to database 70 in relation to user 0008.

[0101] The control device 40 may change the content of the fourth process based on the first determination count and the second determination count.

[0102] For example, in the fourth process, the gate 310 may be closed to confine the inspection object to the inspection region.

[0103] Note that the processing contents shown in FIG. 8 are merely examples and are not limited thereto. For example, in the second processing or the fourth processing, an instruction to open the door may be given and passage may be permitted. In this case, the inspection target 10 who has entered the facility may be guided to a specific location and re-inspected to determine whether or not the target 10 is carrying any dangerous materials, or the inspection target 10 may be monitored by a separate means to prevent dangerous behavior. Also, in the third processing in the case of a transportation system, an instruction to open the door may be given and passage may be permitted. In this case, the crew may confirm whether or not the target 10 has the right to pass inside the vehicle or plane.

[0104] Furthermore, in the first to fourth processes, the database in Figure 9 is updated as described above, but the door 306 is always displayed as "open" and the display device 50 is always displayed as "passage permitted." However, by transmitting the integrated information to the destination of the report, the destination may be approached or questioned at a second separate location.

[0105] In the security inspection system according to the first embodiment, the control device 40 controls the traffic management device 30 and the radar device 20 in an integrated manner. When the traffic management device 30 checks whether the subject of inspection 10 has the right of passage, the subject of inspection stops slightly or slows down. The traffic management device 30 notifies the control device 40 of this timing. At this timing, the control device 40 causes the radar device 20 to emit radio waves and start the inspection. This prevents the position of the subject of inspection from shifting during the transmission and reception of radio waves, which would otherwise degrade the inspection accuracy. This allows for high-throughput, highly accurate security inspections to be carried out.

[0106] Furthermore, the control device 40 can take appropriate action by integrating the determination result of the traffic management device 30 as to whether or not the person has the right of passage and the determination result of the radar device 20 as to whether or not there is a dangerous object, and can therefore take appropriate action. For example, it can appropriately and quickly determine whether to open or close the door 306, or to notify a security guard, station staff, or police officer.

[0107] Second embodiment FIG. 10 is a block circuit diagram for explaining an example of the circuit configuration of a passage management device 30A according to the second embodiment. The first embodiment uses a non-contact medium 320 that stores user authentication information, but the second embodiment does not use a non-contact medium 320. The second embodiment uses a database that stores authentication information in association with user information. The second embodiment obtains user information from biometric information. Examples of biometric information include fingerprints, veins, irises, voice, and faces. FIG. 10 shows an example in which a fingerprint is used as biometric information.

[0108] The passage control device 30A differs from the passage control device 30 in that a fingerprint sensor 330 is provided instead of the non-contact medium sensor 302, and a database 332 is added.

[0109] Like the non-contact medium sensor 302, the fingerprint sensor 330 also consists of multiple sensor elements of different heights arranged in a vertical row in the center of the antenna panel 212, and the sensor element that operates is selected according to the height of the subject 10.

[0110] The fingerprint data and the authentication information are stored in association with each other in the database 332. In the second embodiment, when the inspection target 10 obtains a pass, the fingerprint data and the authentication information are written in association with each other in the database 332.

[0111] When the inspection object 10 enters the inspection area and reaches the position of the fingerprint sensor 330 installed in the center of the inspection area, it stops for a moment and holds its fingerprint over the fingerprint sensor 330. When the fingerprint sensor 330 detects the fingerprint, it transmits a detection signal to the control device 40, and the radar device 20 starts the inspection, just like in the first embodiment.

[0112] When the fingerprint sensor 330 detects a fingerprint, it transmits the fingerprint data to the determination unit 304. The determination unit 304 reads authentication information from the database 332 based on the fingerprint data, and determines whether the inspection target 10 has the right to pass, as in the first embodiment. The subsequent processing is the same as in the first embodiment.

[0113] In the security inspection system according to the second embodiment, the passage management device 30 authenticates the inspection target 10 based on biometric information. As in the first embodiment, the start of authentication is determined by determining whether the target has the right to pass and whether there is a dangerous object, and as in the first embodiment, the control device 40 causes the radar device 20 to start inspection in conjunction with the start of authentication. Therefore, the second embodiment achieves the same functions as the first embodiment.

[0114] The present invention is not limited to the above-described embodiments, and the components can be modified and embodied in practice without departing from the spirit of the invention. Furthermore, various inventions can be created by appropriately combining multiple components disclosed in the above-described embodiments. For example, some components may be omitted from all the components shown in the embodiments. Furthermore, components from different embodiments may be appropriately combined. [Explanation of symbols]

[0115] 10... inspection object, 20... radar device, 30... traffic management device, 40... control device, 50... display device, 60... communication device, 70... database, 302... non-contact medium sensor, 320... non-contact medium

Claims

1. An inspection device that uses radio waves to inspect whether a subject possesses a predetermined object; a traffic management device that determines whether the subject person has the right of passage; a control device connected to the traffic management device; Equipped with the passage management device includes a sensor that detects a non-contact medium having right information used to determine whether the subject person has a right of passage; When the sensor detects the non-contact medium, the traffic management device starts the determination and transmits a first signal; When the control device receives the first signal from the traffic management device, the control device transmits a second signal to the inspection device; A security inspection system, wherein the inspection device starts the inspection when it receives the second signal.

2. The inspection device includes a radar, The security inspection system according to claim 1 , wherein the sensor is installed within a radio wave irradiation range of the radar.

3. The sensor includes a plurality of sensor elements arranged along a vertical direction; The security inspection system according to claim 1 , wherein a part of the sensor elements is selected according to a height of the subject, and the selected sensor elements detect the non-contact medium.

4. An inspection device that uses radio waves to inspect whether a subject possesses a predetermined object; a traffic management device that determines whether the subject person has the right of passage; a control device connected to the traffic management device; Equipped with the traffic management device includes a sensor that detects biological information of the subject; When the sensor detects the biological information, the traffic management device starts the determination and transmits a first signal; When the control device receives the first signal from the traffic management device, the control device transmits a second signal to the inspection device; A security inspection system, wherein the inspection device starts the inspection when it receives the second signal.

5. The inspection device is equipped with a radar The security inspection system according to claim 4 , wherein the sensor is installed within a radio wave irradiation range of the radar.

6. The sensor includes a plurality of sensor elements arranged along a vertical direction; 5. The security inspection system according to claim 4, wherein a part of the sensor elements is selected according to the height of the subject, and the selected sensor elements detect the biological information.

7. A security inspection system as described in any one of claims 1 to 6, wherein the control device transmits a passage permission signal to the passage management device indicating whether or not the subject is permitted to pass, depending on whether or not the subject has the right to pass and whether or not the subject is in possession of a specified item.

8. The traffic control device further comprises a door or bar disposed in the passageway of the subject; The security inspection system of claim 7, wherein the passage control device opens the door or the bar when the passage permission signal indicates that the subject has the right to pass and the inspection result by the inspection device indicates that the subject is not in possession of a specific item.

9. An inspection device that uses radio waves to inspect whether a subject possesses a predetermined object; a control device connected to a traffic management device that determines whether the subject has the right of passage; Equipped with When the control device receives a first signal indicating that the determination has started from the traffic management device, the control device transmits a second signal to the inspection device; the control device transmits a passage permission signal indicating whether or not the subject person is permitted to pass to the passage management device depending on whether or not the subject person has a right of passage and whether or not the subject person is in possession of a predetermined object; the control device writes a first determination result as to whether the target person has the right of passage or not and a second determination result as to whether the target person is in possession of a specific item or not into a database that stores the first determination result as to whether the target person has the right of passage or not, A security inspection system, wherein the inspection device starts the inspection when it receives the second signal.

10. The control device a first determination count in which the first determination result indicates that the subject does not have the right of passage, and a second determination count in which the second determination result indicates that the subject is in possession of a specific item are also written into the database for each subject; 10. The security inspection system according to claim 9, wherein the first judgment result and the second judgment result are reported to different administrators depending on the first judgment count and the second judgment count.

11. A security inspection system as described in any one of claims 1 to 6, further comprising a display device that displays whether or not the subject is allowed to pass depending on whether or not the subject has the right to pass and whether or not the subject is in possession of a specified item.

12. A security inspection system as described in any one of claims 1 to 6, further comprising a communication device that transmits to a specific device information indicating a first determination result as to whether the subject has the right of passage or not and a second determination result as to whether the subject is in possession of a specific item or not.

13. A security inspection system as described in Claim 12, wherein the communication device transmits the information to a different specific device depending on the first judgment result and the second judgment result.

14. A security inspection system as described in any one of claims 1 to 6, wherein the control device stores in a database a first determination result as to whether the subject has the right of passage or not and a second determination result as to whether the subject is in possession of a specific item or not.

15. A security inspection system as described in any one of claims 1, 4, and 9, wherein after transmitting the second signal, the control device receives a third signal from the traffic management device indicating the determination result as to whether the subject has the right of passage.

16. An inspection device that uses radio waves to inspect whether a subject possesses a predetermined object; a traffic management device that determines whether the subject person has the right of passage; a control device connected to the traffic management device; A security inspection method in a system comprising: the passage management device includes a sensor that detects a non-contact medium having right information used to determine whether the subject person has a right of passage; When the sensor detects the non-contact medium, the traffic management device starts the determination and transmits a first signal; When the control device receives the first signal from the traffic management device, the control device transmits a second signal to the inspection device; The security inspection method, wherein the inspection device starts the inspection when it receives the second signal.

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