Entry control system

Abstract

To provide an entry control system that controls entry into a controlled area by impersonation or tailgating.SOLUTION: At an entrance / exit to / from a controlled area, a true user is specified by biometric authentication, and the number of true users and the number of entry scheduled persons of the controlled area are specified. By comparing the number of true users and the number of entry scheduled persons, entry by impersonation or tailgating is restricted. By issuing a temporary tag, entry of an authorized person other than the true user is also permitted. However, in a case in which it is predicted that a set number of persons permitted to enter is exceeded, even entry of the true user is restricted.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an entrance management system that identifies genuine users through biometric authentication, identifies the number of people planning to enter a controlled area, and controls entrance by impersonation or tailgating by comparing the number of genuine users with the number of people planning to enter.

[0002] In detail, the genuine users and their number are identified by a biometric authentication means that acquires biometric information. The number of people planning to enter may be identified by an image acquisition means and an image analysis means at the entrance to the controlled area. The present invention relates to an entrance management system that can determine whether the people planning to enter are only genuine users, and in addition, whether other people included in the people planning to enter are unauthorized entrants.

[0003] Here, the biometric authentication means is preferably a wearable device such as a skin contact type that acquires pulse waves, a glasses type that acquires irises, or a waist-mounted type that acquires movement characteristics, but may also be a determination means that authenticates the user by analyzing the gait of the person walking. The image analysis means, etc., may be capable of acquiring the number of people, and may also be used in combination with a video determination device, a heat detection sensor, etc. [Background technology]

[0004] Conventionally, IC card authentication devices have been widely used at the entrances and exits of factories, where they obtain user IDs from IC cards such as employee ID cards via short-range wireless communication and allow only employees to enter. However, when using IC cards for entrance authentication, it was not possible to prevent "spoofing" through unauthorized use of IC cards or "tailgating" where a legitimate user enters the building.

[0005] In recent years, in the manufacturing industry, strict access control to controlled areas has become necessary to ensure product quality. For example, in the painting of automobiles, even a small amount of dust can affect the quality of the paint, so painting lines are divided by partitions to restrict the entry of anyone other than skilled workers who are well versed in painting work.

[0006] In addition, the Pharmaceutical Inspection Convention and Pharmaceutical Inspection Joint Scheme (hereinafter referred to as "PIC / S"), which includes the European Medicines Agency, the US Food and Drug Administration, and Japan's Ministry of Health, Labor and Welfare, has adopted a new standard that states, "The maximum number of operators in a clean room shall be determined so as not to compromise the assurance of sterility (omitted) (2022 revised PIC / S GMP Annex1 7.2)," and entry management, including limiting the number of people, is now required in the pharmaceutical industry.

[0007] Conventionally, in many fields, there are controlled areas where tailgating should be prevented, such as entry to an event venue or entry to a bank vault. In these controlled areas, the number of visitors is controlled by the presentation of identification cards, visitor count machines, etc.

[0008] However, simply obtaining the number of visitors is not enough to prevent unauthorized visitors from entering, and there is a need for a system that can limit the number of visitors while also guaranteeing proper entry. Therefore, the inventor has invented an admission control system that can manage admission by impersonation and tailgating, and can also be applied to controlled areas with capacity limits.

[0009] Patent Document 1 discloses technology for an entrance management system that uses biometric information to authenticate a user and manages the user's entry into a designated area. According to the technology described in this document, before a user enters a designated area, multiple pieces of biometric information are repeatedly acquired and stored by an authentication device, and from the multiple pieces of stored biometric information, the biometric information with the most suitable quality for biometric authentication is extracted and the biometric authentication is performed.

[0010] However, even if the technology described in Patent Document 1 improves the accuracy of personal authentication, there is still a problem that when the authentication device is used by another person after personal authentication has been completed, it is possible for that other person to "impersonate" themselves and enter the facility, just as with IC card authentication.

[0011] In addition, even if the technology described in Patent Document 1 could manage the entry of authenticated users, if there was tailgating, the actual number of visitors would be greater than the number of authenticated users, and the number of visitors could not be managed. Furthermore, since the allowable number of visitors was not set, the number of visitors could not be limited even if the current number of visitors was high, and it was not possible to comply with the revised PIC / S in 2022.

[0012] Patent Document 2 discloses technology for a suspicious person detection system that is capable of identifying a suspicious person among multiple users attempting to enter a restricted access area.

[0013] According to the technology described in this document, multiple antennas are installed at the entrances and exits of buildings, radio waves transmitted from preregistered mobile terminals are received by the multiple antennas, and the exact location of each mobile terminal is identified by trilateration based on the radio wave intensity of the received radio waves. Furthermore, images of people are photographed with a camera, the location of each image is identified, and people whose image location does not match the location of their mobile terminal are determined to be suspicious.

[0014] However, even if the technology described in Patent Document 2 can identify the location of the mobile terminal and the number of people in the area and prevent tailgating, there is a problem that if the mobile terminal is used fraudulently, the fraudulent user will be allowed to remain in the restricted access area, and impersonation cannot be prevented. [Prior art documents] [Patent documents]

[0015] Patent Document 1: JP 2015-185097 A Patent Document 2: International Publication No. 2007-138811 Summary of the Invention [Problem to be solved by the invention]

[0016] The problem that the present invention aims to solve is to provide an entrance management system that identifies genuine users by biometric authentication at the entrance to a controlled area, identifies the number of genuine users and the number of people planning to enter the controlled area, and manages entry by impersonation or tailgating by comparing the number of genuine users with the number of people planning to enter. [Means for solving the problem]

[0017] A first aspect of the present invention is an entrance management system for managing entrance to a controlled area, the system including a wearable device, a means for acquiring the number of people expected to enter, a means for acquiring the number of genuine users, a means for determining whether or not a user is a genuine user, a means for identifying a location, and a radio wave transmitting and receiving means, the wearable device functions as a biometric information acquiring means for continuously acquiring biometric information of a user, a user determining means for comparing the biometric information with biometric determination information to determine whether or not the user is a genuine user, and a biometric information storing means for storing the biometric determination information of genuine users in advance, The acquisition means is an image acquisition means and an image analysis means, and the image acquisition means and the radio wave transmission and reception means are provided at an entrance to the controlled area, the image analysis means analyzes the entrant image acquired by the image acquisition means and acquires the number of people expected to enter at the entrance, the biometric information acquisition means acquires biometric information of users entering the controlled area at the entrance, the user determination means collates the biometric information with the biometric determination information to determine whether the user is an authorized genuine user, and the genuine user number acquisition means determines whether the user is a genuine user. the tailgating determination means determines that there is no tailgating when the number of people planning to enter is the same as the number of genuine users, and determines that there is tailgating when the number of people planning to enter exceeds the number of genuine users; the radio wave transmitting and receiving means functions as angle detection means for detecting an arrival angle of a position specifying radio wave from the wearable device, and the position specifying radio wave is at least an angle of an emitted radio wave originating from the wearable device or a response radio wave emitted by the wearable device in response to a second emitted radio wave originating from the radio wave transmitting and receiving means. The angle detection means includes a plurality of radio wave detection means, each of which is arranged in a line and receives the same position-specific radio wave, and the angle detection means detects the angle of arrival of the position-specific radio wave based on the time difference at which each of the radio wave detection means receives the position-specific radio wave, and the position identification means identifies the position of the wearable terminal based on the position at which the radio wave emitting and receiving means is provided and the angle of arrival, thereby determining whether or not a vehicle is tailgating and identifying the position of the wearable terminal.

[0018] The biometric information acquiring means acquires the biometric information of the user at the entrance to the controlled area, and compares it with the biometric determination information stored in the biometric information storing means to determine whether the user is genuine or not. The "entrance" may be the space of the anteroom in the clean room, but it does not have to be a closed space. Since the user is determined to be genuine or not in front of the door from the anteroom to the controlled area, an unauthorized entrant cannot pose as a genuine user.

[0019] The entrance management system may be based on an information processing device such as a PC or server (hereinafter referred to as a PC), but is not limited to this, and may be based on a cloud server or dedicated equipment. Biometric information may be obtained from a wearable device placed on the skin of a person or from a video of a person taken at the entrance or exit.

[0020] The biometric information acquisition means is preferably a wearable device capable of acquiring biometric information continuously, but biometric information may also be acquired by externally observing the user's motion characteristics, etc. In the case of a wearable device, if it is a skin contact type that comes into contact with the skin, pulse waves, patterns made by venous blood vessels, patterns made by the opening and arrangement of pores, pigmentation patterns on the skin, etc. may be acquired by optical sensors, etc. If it is a glasses type, the iris may be acquired by optical sensors, etc. If it is a waist-worn type, the user's motion may be acquired by acceleration sensors, gyro sensors, etc.

[0021] On the other hand, when a user is identified by photographing the user's walking posture at the entrance to the controlled area and gait analysis is performed, the biometric information acquisition means implemented by the processing means of the PC analyzes the video showing the user's walking posture to acquire the motion features that constitute the biometric information, and the user is identified by the user identification means. When gait analysis is performed, it is of course necessary to make the space at the entrance longer.

[0022] The biometric information storage means stores biometric determination information corresponding to the type of biometric information acquisition means. The user determination means compares the acquired biometric information with the biometric determination information to determine whether or not the user is a genuine user registered in advance. The genuine user number acquisition means acquires the number of users determined to be genuine, and sets this as the number of genuine users. When user determination is performed by each wearable device, it is sufficient to have a PC acquire the determination results from the wearable device and acquire the number of genuine users on the PC.

[0023] The means for acquiring the number of people expected to enter acquires the number of people expected to enter by photographing people expected to enter with an image acquisition means at the entrance to the controlled area and analyzing the photographed image with a known image analysis means. The means for preventing tailgating determines whether or not there is tailgating based on the number of people expected to enter acquired immediately before entry, and therefore can correctly determine whether or not there is tailgating.

[0024] The image for analysis may be acquired using an optical camera, a thermography camera, etc. The acquired image for analysis is used by causing any processing means of the entrance management system connected to the network to function as an image acquisition means to acquire images of visitors at the entrance / exit. Then, the processing means of the PC is caused to function as an image analysis means to analyze the acquired image for analysis in the same manner as a known surveillance camera, and the number of people expected to enter at the entrance / exit is acquired.

[0025] When a wearable device that has been determined to be a genuine user is removed, the continuity of the wearing state is interrupted, and the wearable device is handed over to another person, the wearable device goes into a non-functioning state. This makes it possible to quickly determine at the entrance / exit that a user who is continuously wearing a wearable device is a genuine user, thereby efficiently preventing entry by impersonation.

[0026] The angle detection means may specify the arrival angle of the radio wave by, for example, a direction detection function based on the Angle of Arrival method (hereinafter referred to as the AoA method) functioning in Bluetooth (registered trademark) 5.1. The angle detection means includes a plurality of radio wave detection means arranged side by side. Since the radio wave detection means are arranged side by side, the angle detection means can detect the arrival angle of the position-specifying radio wave based on the time difference between reception times of the radio wave detection means.

[0027] The number of angle detection means is not limited. When multiple angle detection means are installed, it is sufficient to specify the intersection position of multiple arrival angle directions, and when one angle detection means is installed, it is sufficient to specify the position of the arrival angle direction at waist height of a person. The position specification radio wave may be either an active method in which an outgoing radio wave is transmitted from the wearable terminal as the origin, or a passive method in which a response radio wave is transmitted from the wearable terminal in response to a second outgoing radio wave transmitted from the radio wave transmitting and receiving means as the origin. The outgoing radio wave and the response radio wave may be mixed by changing the frequency and waveform of the radio wave.

[0028] According to the first invention, just before a user enters a controlled area, biometric information is used to determine whether the user is a genuine user, preventing entry by spoofing, and the number of genuine users is compared with the number of people expected to enter to determine whether there are any accompanying users. This allows only users who are permitted to enter to enter, and provides an advantageous effect not seen in the past of being able to manage entry by spoofing or tailgating.

[0029] Furthermore, the angle detection means provided in the radio wave transmitting and receiving means detects the angle of arrival of the position-specifying radio wave from the wearable device to specify the position of the wearable device. This makes it possible to specify the position of the genuine user with high accuracy, and when a tailgating state is recognized, it is possible to specify the genuine user who is about to be tailgated.

[0030] A second invention of the present invention is characterized in that, in the entrance management system of the first invention, it further includes a temporary tag, which, like the wearable terminal, transmits the position-specific radio waves, and the angle detection means detects the arrival angle of the position-specific radio waves based on the time difference between when each of the radio wave detection means receives the position-specific radio waves from the temporary tag, and the position identification means identifies the position of the temporary tag based on the position where the radio wave emission and reception means is installed and the arrival angle.

[0031] According to the second invention, even if wearable devices and temporary tags are mixed, the positions of the wearable device and temporary tag can be identified. A temporary tag is a wireless tag issued to an individual who is permitted to enter, such as an inspector or auditor. The form of the wireless tag is not limited, and may be, for example, an IC card type RFID tag, a Bluetooth (registered trademark) tag, or the like.

[0032] The communication standards of the temporary tag and the wearable terminal may be the same, but it is preferable to use different communication standards. If the wearable terminal and the temporary tag use different communication standards, it is easy to distinguish a temporarily authorized person carrying a temporary tag from a genuine user. According to the second invention, it is possible to control the entry of authorized users other than genuine users.

[0033] A third aspect of the present invention is an entrance management system for managing entrance to a controlled area, the system including a wearable device, a means for acquiring the number of people expected to enter, a means for acquiring the number of genuine users, a means for determining whether or not a user is a genuine user, a position identification means, and three or more radio wave transmitting and receiving means arranged to form a triangle, the wearable device functions as a biometric information acquiring means for continuously acquiring biometric information of a user, a user determination means for comparing the biometric information with biometric determination information to determine whether or not the user is a genuine user, and a biometric information storage means for storing in advance the biometric determination information of genuine users, the means for acquiring the number of people expected to enter is an image acquiring means and an image analyzing means, the image acquiring means is provided at an entrance to the controlled area, the radio wave transmitting and receiving means is provided in an area where radio wave transmission and reception is possible with the wearable device, the image analyzing means analyzes an image of a user acquired by the image acquiring means to acquire the number of people expected to enter at the entrance, the biometric information acquiring means acquires the biometric information of a user entering the controlled area at the entrance, and the user determination means the biometric information is compared with the biometric determination information to determine whether the user is an authorized genuine user; the genuine user number acquisition means acquires the number of genuine users; the tailgating determination means determines that there is no tailgating when the number of people planning to enter is the same as the number of genuine users, and determines that there is tailgating when the number of people planning to enter exceeds the number of genuine users; the radio wave transmitting and receiving means receives position-specifying radio waves from the wearable terminal, and the position-specifying radio waves are at least one of an transmitted radio wave originating from the wearable terminal or a response radio wave emitted by the wearable terminal in response to a second transmitted radio wave originating from the radio wave transmitting and receiving means; the radio wave transmitting and receiving means also functions as a radio wave measuring means, and the radio wave measuring means measures a radio wave intensity value or a reception time of the position-specifying radio wave; and the position specifying means specifies the position of the wearable terminal based on the three or more received radio wave intensity values ​​or the reception times, thereby determining whether tailgating is occurring and specifying the position of the wearable terminal.

[0034] According to the third aspect of the present invention, radio wave transmitting and receiving means installed at three or more locations to form a triangle receive position-specific radio waves from a wearable device and measure the radio wave intensity value or reception time. The position-specification means determines the position of the wearable device by drawing an arc with a radius of a length according to the radio wave intensity value measured by the three or more locations of the radio wave transmitting and receiving means, centered on the location of the radio wave transmitting and receiving means, and finding an intersection point. The radius may be proportional to the reception time and inversely proportional to the radio wave intensity value.

[0035] The location-specific radio waves are preferably, but not limited to, an active method in which radio waves are transmitted from the wearable terminal as the origin.The communication standard of the radio wave transmitting and receiving means is preferably, but not limited to, Bluetooth (registered trademark), RFID, etc. At the entrance and exit of the controlled area, radio wave transmitting and receiving means are arranged in three or more locations, so that even if multiple genuine users are located close to each other at the entrance and exit, it is easy to distinguish between the respective genuine users, and the position of the genuine user can be identified with high accuracy.

[0036] A fourth invention of the present invention is characterized in that, in the entrance management system of the third invention, it further includes a temporary tag, which, like the wearable terminal, transmits the location-specific radio waves, the radio wave measuring means measures the radio wave intensity value or reception time of the location-specific radio waves from the temporary tag, and the location identifying means identifies the location of the temporary tag based on three or more of the received radio wave intensity values ​​or reception times.

[0037] The wireless tag type of the temporary tag is not limited, and may be, for example, any of an IC card type RFID tag, a Bluetooth (registered trademark) tag, etc. According to the fourth invention, even if wearable terminals and temporary tags are mixed, the positions of the wearable terminal and the temporary tag can be identified.

[0038] The fifth invention of the present invention is an entrance management system of the first to fourth inventions, further including an allowable number of visitors setting means, a visitor number acquisition means, and an entrance restriction means, wherein the allowable number of visitors setting means sets the allowable number of visitors who can stay in the managed area, the visitor number acquisition means acquires the number of visitors present in the managed area, and the entrance restriction means does not open the entrance / exit door when the number of visitors is not less than the allowable number of visitors.

[0039] The number of people in a controlled area can be obtained by analyzing the captured images. The allowable number of people can be set according to the characteristics and size of the controlled area. For example, in the case of a clean room in a pharmaceutical factory, the allowable number of people should be set so as not to compromise the assurance of sterility in accordance with the revised PIC / S. In the case of a factory with two shifts, day and night, the allowable number of people can be increased by the time required for a specified work handover.

[0040] According to the fifth invention, the entrance / exit door can only be opened when the number of visitors in the managed area is less than the permitted number of visitors in the managed area, so that the number of visitors will not exceed the permitted number of visitors.

[0041] A sixth aspect of the present invention is the admission management system of the fifth aspect, further comprising a number of expected visitors acquisition means for acquiring the sum of the number of expected visitors and the number of visitors, and when the admission restriction means determines that the sum exceeds the allowable number of visitors, a warning is displayed.

[0042] According to the sixth aspect of the invention, if the sum of the number of people planning to enter at the entrance and the number of people staying in the controlled area exceeds the allowable number of people staying, a warning is displayed. According to the sixth aspect of the invention, the warning display encourages only selected people from among the multiple people planning to enter to enter, thereby preventing the number of people staying from exceeding the allowable number of people staying. Effect of the Invention

[0043] According to the first aspect of the present invention, only users who are permitted to enter can be allowed to enter, and entry by impersonation or tailgating can be controlled, which is an advantageous effect not seen in the past. In addition, since a user who is continuously wearing a wearable device at the entrance can be determined to be a genuine user in a short time, entry by impersonation can be efficiently prevented. Furthermore, when a tailgating state is recognized, it is possible to identify the genuine user who is being tailgated.

[0044] According to the second aspect of the present invention, it is possible to control the entry of authorized users other than genuine users. According to the third aspect of the present invention, even if multiple genuine users are located close to each other at an entrance / exit, it is easy to distinguish between the respective genuine users, and the position of the genuine user can be identified with high accuracy. According to the fourth aspect of the present invention, even if wearable devices and temporary tags are mixed together, the positions of the wearable device and temporary tags can be identified.

[0045] According to the fifth aspect of the present invention, the entrance door can be opened only when the number of people in the controlled area is less than the permitted number of people in the controlled area, so that the number of people will not exceed the permitted number of people. According to the sixth aspect of the present invention, the warning display encourages entry to only selected people among a plurality of people planning to enter, thereby preventing the number of visitors from exceeding the permitted number of visitors. [Brief description of the drawings]

[0046] [Figure 1] Layout of the clean room (Example 1). [Diagram 2] Overall flow (Example 1). [Diagram 3] Block diagram (Example 1). [Figure 4] 1 shows a flow of a process for acquiring biological information (first embodiment). [Diagram 5] 13 is a flow chart showing a user determination process (first embodiment). [Figure 6] 13 is a flow chart showing a process for obtaining the number of genuine users (first embodiment). [Figure 7] 13 is a process flow for acquiring the number of expected visitors (first embodiment). [Figure 8] Tailgating determination process flow (Example 1). [Figure 9] Entry restriction process flow (Example 1). [Figure 10] Door opening / closing process flow (Example 1). [Figure 11] FIG. 2 is an explanatory diagram of a position specifying means (first embodiment). [Figure 12] FIG. 2 is an explanatory diagram of a position specifying means (first embodiment). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0047] The entrance management system 1 authenticates genuine users by biometric authentication at the entrance to the controlled area, and prevents impersonation and tailgating by comparing the number of people planning to enter with the number of genuine users. Also, the permitted number of people staying in the controlled area is set, and if the permitted number of people is exceeded when all people planning to enter have entered, a warning is displayed to those planning to enter and the opening and closing of the door is restricted. EXAMPLES

[0048] In the first embodiment, an entrance management system 1 that manages entrance to a clean room and stay within the clean room will be described with reference to Fig. 1 to Fig. 12, taking a clean room as an example. Fig. 1 shows a plan view of the clean room, Fig. 2 shows the overall flow, and Fig. 3 shows a block diagram of the entrance management system 1. Fig. 4 to Fig. 10 show the main flow, and Fig. 11 and Fig. 12 explain an example of identifying the position of a genuine user at an entrance / exit.

[0049] The clean room 10 is made up of an antechamber 20, which serves as the entrance and exit to the clean room, and a second clean room 30, which is further divided by a partition within the clean room. Doors 40, whose opening and closing is controlled by the entrance and exit management system 1, are provided between the antechamber and the clean room, and between the clean room and the second clean room. A user 50, shown by a dashed line, is wearing a wearable terminal 60, and is accompanied by a person 51 behind the user. The antechamber 20 is also provided with a warning display 83 that is turned on when the number of people staying in the clean room becomes excessive.

[0050] The antechamber 20 is provided with an optical camera that photographs people planning to enter and a radio wave transmitting and receiving means. The clean room is provided with image acquisition means 70 consisting of optical cameras and radio wave transmitting and receiving means 80 at appropriate intervals to prevent blind spots. The second clean room 30 is also provided with image acquisition means 70 consisting of optical cameras that photograph people planning to enter and a radio wave transmitting and receiving means 80. The PC 90 on which the entrance management system 1 runs transmits and receives information via the image acquisition means 70, the radio wave transmitting and receiving means 80, the wearable terminal 60, and the communication means 100 (see FIG. 3).

[0051] After a user enters the anteroom 20, the entrance management system 1 executes the following processes (see FIG. 2): user biometric information acquisition process (S100), user determination process (S200), genuine user number acquisition process (S300), expected entry number acquisition process (S400), tailgating determination process (S500), entrance restriction / door opening restriction process (S600), and entrance restriction / warning process (S700), and then opens the door 40 to the clean room. After expected entry persons who meet the requirements, such as a genuine user and a temporarily permitted person carrying a temporary tag, enter, the door 40 is closed.

[0052] When the compartment is small, such as the antechamber 20 or the second clean room 30, one image acquisition means 70 and one radio wave transmitting and receiving means 80 are sufficient, but since the clean room 10 has a large compartment and multiple users stay there, multiple image acquisition means 70 and multiple radio wave transmitting and receiving means 80 may be installed according to the size of the compartment.

[0053] Here, the entrance control system 1 will be described with reference to the overall flow shown in Fig. 2, the block diagram shown in Fig. 3, and each execution step shown in Fig. 4 to Fig. 10. Fig. 3 shows a block diagram of the entrance control system 1. The entrance control system 1 essentially comprises a processing means and storage means constituted by a PC 90, an image acquisition means 70 constituted by an optical camera, a video camera, etc., a temporary tag 110, a radio wave transmission and reception means 80, and a communication means 100.

[0054] In the case of gait assessment in which biometric information is identified from image information, the image acquisition means 70 acquires a video showing the walking posture, and has the PC 90 acquire the video via the communication means 100 and proceed to user determination. However, in the case where the wearable terminal 60 is used as the biometric authentication means, the storage means of the wearable terminal 60 is used as the biometric information storage means, and the user determination is made by the processing means of the wearable terminal 60.

[0055] Specifically, for example, in the case of gait identification, biometric authentication may be performed by the processing means of the PC 90, and in the case of user identification by pulse waves, venous blood vessel patterns, etc., biometric authentication may be performed by the processing means of the wearable terminal 60. For ease of understanding, in one block diagram shown in Fig. 2, parentheses are used to indicate that the division of functions changes depending on the form of biometric authentication.

[0056] In the entrance management system 1, an optical sensor provided in the wearable terminal 60 constitutes the biometric information acquisition means. Pulse waves, patterns of venous blood vessels, etc. may be acquired as biometric information, but are not limited to such, and patterns of pore openings and arrangements may also be acquired as biometric information. The storage means of the wearable terminal stores the biometric information.

[0057] The user determination means compares the biometric information acquired by the optical sensor with the biometric determination information read from the storage means to determine whether the user 50 wearing the wearable terminal 60 is a genuine user who was previously scheduled to wear the wearable terminal, and if the user is a genuine user, the radio wave transmission and reception function of the wearable terminal 60 is enabled.

[0058] There are two methods: an active method in which the wearable terminal 60 / temporary tag 110 is used as the starting point to transmit an outgoing radio wave as a location-specifying radio wave, and a passive method in which the wearable terminal 60 / temporary tag 110 transmits a response radio wave as a location-specifying radio wave, using a second outgoing radio wave from the radio wave transmitting and receiving means 80 as the starting point. These methods may be used together. For ease of understanding, the fact that the functional division of the configuration changes depending on the mode of transmission of the location-specifying radio wave is indicated in parentheses in one block diagram shown in Figure 2.

[0059] The entrance management system 1 comprises a PC 90, a communication means 100, an image acquisition means 70, a wearable terminal 60, a temporary tag 110, and a radio wave transmission and reception means 80. The PC 90 comprises a processing means 91 and a storage means 92. The processing means 91 functions as a means for acquiring the number of people expected to enter, a means for acquiring the number of genuine users, a means for determining whether or not a person is accompanying a person, a means for specifying a position, a means for setting the number of people allowed to stay, a means for acquiring the number of people staying, an entrance restriction means for restricting the opening of the door, a means for predicting the number of people expected to stay, and an entrance restriction means for issuing a warning (see FIG. 2).

[0060] In the case of authentication based on gait, the processing means 91 functions as a means for acquiring biometric information from an image, and functions as a means for determining a user by comparing the biometric information with the gait. The means for acquiring the number of expected visitors acquires the number of expected visitors by having the image analysis means analyze the image acquired by the image acquisition means.

[0061] The storage means 92 functions as a biometric information storage means for storing biometric determination information, a temporary tag information storage means, and a radio wave transmitter / receiver information storage means. The biometric information storage means stores the wearable device ID and radio wave information such as the frequency and waveform of the radio waves emitted by the wearable device. Furthermore, when the biometric determination is based on gait, the biometric determination information is stored.

[0062] The temporary tag information storage means stores the temporary tag ID provided to the person temporarily permitted to enter and the radio wave information emitted by the temporary tag. The radio wave transmitter / receiver information storage means stores the radio wave transmitter / receiver ID, the installation position of the radio wave transmitter / receiver, and the radio wave information emitted by the radio wave transmitter / receiver.

[0063] The image acquisition means 70 is made up of an optical camera, a video camera, etc., and acquires images of visitors (user 50, accompanying person 51) in the anteroom 20. The captured images are acquired by the processing means 91 of the PC via the communication means 100, and the expected visitor number acquisition means operated by the processing means acquires the number of expected visitors. In addition, when the biometric information is gait, the biometric information formed by the movement characteristics of the visitor from the moving image forming the image is acquired by the biometric information acquisition means of the processing means 91, and the biometric information is compared with the biometric judgment information stored in the biometric information storage means, and the user judgment means makes a user judgment.

[0064] The processing means of the wearable terminal 60 functions as a user determination means, and as a biometric information acquisition means via the optical sensor. The storage means of the wearable terminal functions as a biometric information storage means, and stores user determination information of genuine users.

[0065] The wearable terminal 60 also has a function of transmitting and receiving position-specific radio waves. It can transmit an outgoing radio wave as a position-specific radio wave in an active manner, and can receive a second outgoing radio wave from the radio wave transmitting and receiving means in a passive manner and transmit a response radio wave in response. The wearable terminal 60 communicates the outgoing radio wave, the second outgoing radio wave, and the response radio wave with the radio wave transmitting and receiving means 80, causing the radio wave transmitting and receiving means 80 to acquire the position of the wearable terminal 60.

[0066] The temporary tag 110 may be an IC card equipped with a wireless tag such as an RFID tag or a Bluetooth (registered trademark) tag, and in the same manner as the wearable terminal 60, location-specific radio waves are exchanged between the temporary tag 110 and the radio wave transmitting and receiving means 80, causing the radio wave transmitting and receiving means 80 to obtain the location of the temporary tag 110.

[0067] As an example, the radio wave transmitting and receiving means 80 includes an angle detection means 81. The angle detection means 81 has a plurality of lined up radio wave detection means 82, 82..., each of which receives an transmitted radio wave or a response radio wave from the wearable device 60, and the angle detection means 81 detects the angle of arrival of the radio wave (see FIG. 12).

[0068] The angle detection means 81 analyzes the phase difference and arrival angle of the radio waves received by each radio wave detection means 82, which are generated according to the spacing between the wearable terminals, to obtain the position of the wearable terminal 60. Of course, if the radio wave information formed by the frequency and waveform of the radio waves emitted by each wearable terminal is changed, it is possible to handle even a large number of wearable terminals. The position of the temporary tag 110 can also be obtained in a similar manner.

[0069] Here, the execution flow by the processing means will be specifically described with reference to Fig. 4 to Fig. 10. Fig. 4 shows the biometric information acquisition process flow, Fig. 5 shows the user determination process flow, Fig. 6 shows the genuine user number acquisition process flow, Fig. 7 shows the number of people expected to enter acquisition process flow, Fig. 8 shows the tailgating determination process flow, Fig. 9 shows the entrance restriction / door opening restriction process flow, and Fig. 10 shows the entrance restriction / warning process flow.

[0070] First, in the anteroom 20, a biometric information acquisition process (S100) is performed to acquire biometric information of a person scheduled to enter (see FIG. 4). In the biometric information acquisition process, the type of biometric determination is determined, and a flag corresponding to the type is assigned. When biometric determination is performed by gait assessment, which does not require the wearing of a wearable device, it is set in advance to perform user determination by gait assessment. Biometric authentication may be performed only by gait assessment, or the setting of gait assessment may be omitted and biometric authentication may be performed only by the wearable device.

[0071] Gait analysis identifies an individual based on motion characteristics unique to that individual, so biometric information is constantly being acquired. If the wearable device is removed at an entrance or exit, the device ID of the wearable device is no longer transmitted, and the continuity is broken, so the individual is determined to be "other person." First, in step 110, it is determined whether or not biometric authentication is based on gait analysis. If the result is YES, the process proceeds to step 150, where a gait analysis flag, for example "1," is assigned (S150), and the process proceeds to user determination by the PC processing means in step 170 (S170). If the result is NO, the process proceeds to step 120, where it is determined whether or not biometric authentication is based on the wearable device (S120).

[0072] If the answer is YES in step 120, the process proceeds to step 130, where a flag for the wearable device, for example "2" is assigned (S130), and the process proceeds to user determination by the wearable device in step 160 (S160). If the answer is NO, the process proceeds to step 140, where a flag for a person other than the biometric determination person, for example "3" is assigned (S140), and the process proceeds to user determination by the PC processing means in step 170 (S170). In the biometric information acquisition process (S100), a flag of "1", "2", or "3" is assigned to the person scheduled to enter, and the process proceeds to user determination process in step 200).

[0073] In step 200, for a prospective visitor who has been assigned flag "2", in the user determination process, processes from S210 to S240 are executed on the wearable device, and processes from S250 to S280 are executed by the processing means 91 of the PC. For a prospective visitor who has been assigned flags "1" and "3", processes from S210 to S280 are executed by the processing means 91 of the PC (see FIG. 5).

[0074] Specifically, in the user determination process (S200), first, in step 210, biometric determination information is read from the storage means of the PC or wearable terminal according to the value of the flag (S210), then in step 220, biometric information according to the value of the flag is acquired (S220), and the process proceeds to determining the biometric information in step 230 (S230).

[0075] In step 230, the user's biometric information is compared with the biometric determination information according to the value of the flag to determine whether they are identical (S230). If the result is YES, the person planning to enter is determined to be a genuine user (S240), and the process proceeds to step 280. If the result is NO, the process proceeds to step 250, where it is determined whether the person has a temporary tag. If the result is YES in step 250, the process proceeds to step 260, and the person planning to enter is determined to be a temporarily permitted person (S260).

[0076] If the answer is NO at step 250, the process proceeds to step 270, where the person planning to enter is determined to be someone else (S270). After determining that the person planning to enter is a genuine user (S240), a temporarily permitted person (S260), or someone else (S270), the process proceeds to step 280, where the user determination result is acquired by the PC 90 (S280). If the genuine user determination is performed by the wearable terminal, the genuine user determination result can be acquired by the PC 90 via the communication means 100.

[0077] After the user determination process, the process proceeds to step 300, which is a process for obtaining the number of genuine users (see FIG. 6). First, in step 310, it is determined whether a wearable wearer flag, for example "2", has been assigned, and if YES, the process proceeds to step 320, where the number of genuine users of wearable wearers is acquired (S320). If NO, the process proceeds to step 330, where it is determined whether a gait appraiser flag, for example "1", has been assigned (S330), and if YES, the process proceeds to S340, where the number of genuine users of gait appraisers is acquired (S340).

[0078] From step 320 and step 340, the process proceeds to step 350, where the number of genuine users consisting of wearable wearers and gait appraisers is added together to obtain the number of genuine users (S350). If the gait appraiser's flag, for example "1", is not assigned in step 330, specifically if a flag other than that of a liveness judge, for example "3", is assigned, the process proceeds to step 360, where the number of genuine users is not acquired, and the process of acquiring the number of genuine users ends.

[0079] In the process of acquiring the number of people expected to enter in step 400, in step 410, an image of the entire anteroom 20 forming the entrance is taken by the image acquiring means 70 (see FIG. 1) (S410), and in step 420, an image of the entrance is acquired by the image acquiring means of the processing means 91 of the PC 90 via the communication means 100 (S420). Proceeding to step 430, the number of people expected to enter in the anteroom 20 is acquired by a known image analysis means functioning in the processing means 91 (S430).

[0080] The order of the genuine user number acquisition process (S300) and the planned entry number acquisition process (S400) is not limited, but after these steps, the process proceeds to the tailgating determination process in step 500 (S500). In the tailgating determination process, the number of planned entry people acquired in the planned entry number acquisition process (S400) is acquired in step 510, the number of genuine users acquired in the genuine user number acquisition process (S300) is acquired in step 520, and the process proceeds to step 530.

[0081] In step 530, it is determined whether the number of people expected to enter is the same as the number of genuine users (S530), and if YES, the process proceeds to step 540, where it is determined that there is no accompaniment (S540), and the process proceeds to step 550, where the door to the controlled area is unlocked and the door can be opened and closed (S550). If NO, the process proceeds to step 560, where it is determined that there is accompaniment (S560), and the door remains locked, restricting the opening of the door (S570).

[0082] In steps 600 and 700, the number of people in the controlled area is acquired and entry to the controlled area is restricted. First, before starting the entry restriction and door opening restriction process in step 600, the allowable number of people who can stay in the controlled area is set in step 601 (S601). The allowable number of people may be set to accommodate PIC / S, and the allowable number of people may be changed depending on the time of day.

[0083] In the entry restriction / door opening restriction process (S600) in step 600, first the number of people in the clean room 10 which constitutes the controlled area is photographed by the image acquisition means 70, the image is acquired by the PC 90, and the number of people in the clean room is acquired in step 610 by image analysis by the number of people acquisition means performed by the processing means 91, in the same way as the number of people expected to enter acquisition means (S610), and then the process proceeds to step 620.

[0084] In step 620, it is determined whether the number of people in the clean room (S610) is less than the permitted number of people (S620). If the answer is YES in step 620 and there is a surplus of people to admit, the door 40 to the clean room 10 is unlocked so that it can be opened. If the answer is NO, the door remains locked and opening of the door is restricted (S630).

[0085] The admission restriction / warning process (S700) in step 700 shows the process to be performed when the sum of the number of people planning to enter and the number of people staying exceeds the allowable number of people staying. First, in step 710, the number of people planning to enter previously acquired (S430) is acquired (S710). The sum of the number of people planning to enter (S430) and the number of people staying acquired in step 720 (S610) is acquired (S720), and the process proceeds to step 730.

[0086] In step 730, it is determined whether the sum exceeds the allowable number of visitors (S730). If the answer is YES, the process proceeds to step 740, and since allowing all of the people scheduled to enter would exceed the allowable number of visitors, the "warning display 83" is turned on in the anteroom 20 (S740). When the "warning display 83" is turned on, only a number of people within the margin can be selected and allowed to enter. If the answer is NO, the process proceeds to step 750. In step 750, even if all of the people scheduled to enter enter the clean room, the allowable number of visitors will not be exceeded, so the door can be opened and entry is permitted (S750).

[0087] 11 and 12, two examples of identifying the positions of the wearable terminal and the temporary tag in the antechamber 20 will be described. An outgoing radio wave indicating the device ID may be transmitted as a location-identifying radio wave starting from the wearable terminal in an active manner, or the wearable terminal may receive a second outgoing radio wave transmitted from one of the radio wave transmitting and receiving means and transmit a response radio wave indicating the device ID as a location-identifying radio wave in a passive manner.

[0088] For ease of understanding, Fig. 11 shows an example in which the location is identified based only on the reception time of the radio wave transmission / reception means at three locations receiving the radio wave transmission / reception signal indicating the device ID transmitted by the wearable device. Of course, the location may also be identified based on the radio wave strength that attenuates according to the distance. Fig. 11(A) shows an active method, and Fig. 11(B) shows a passive method.

[0089] In Example 1, radio wave transmitting and receiving means 80α, 80β, and 80γ arranged at three locations to form a triangle each receive a position-specific radio wave and function as a radio wave measuring means. FIG. 11(A) shows an explanatory diagram of an active method in which an outgoing radio wave (see dashed line arrow) indicating a device ID is transmitted from a wearable terminal as a position-specific radio wave. FIG. 11(B) shows an explanatory diagram of a passive method in which a response radio wave (see dashed line arrow) indicating a device ID is transmitted from a wearable terminal as a position-specific radio wave in response to a second radio wave (see solid line arrow) transmitted from the radio wave transmitting and receiving means as a position-specific radio wave. The radio wave transmitting and receiving means does not need to be installed inside the entrance and may be installed outside the entrance as long as it is possible to transmit and receive radio waves.

[0090] Whether the location-specific radio wave indicating the device ID is an outgoing radio wave or a response radio wave, the reception time until it reaches the radio wave measuring means arranged at three locations varies depending on the positions of the wearable device and the radio wave transmitting and receiving means. The position of the wearable device can be identified by drawing arcs with radii corresponding to the reception times received by each of the radio wave transmitting and receiving means 80α, 80β, and 80γ as the center and calculating the positions of the intersections of the three arcs (see Figures 11(A) and 11(B)).

[0091] When the radio wave measurement means determines the location based on the strength of the received radio waves, the closer the distance, the greater the radio wave strength value of the received radio waves, so the location of the wearable device can be determined by calculating the position of the intersection of the three arcs using the inverse of the radio wave strength value.

[0092] Next, a second example of identifying the position of a wearable device using only one radio wave transmitting and receiving means will be described with reference to Fig. 12. In Fig. 12 as well, an outgoing radio wave or a response radio wave indicating a device ID is transmitted from the wearable device, but for ease of understanding, an example in which an outgoing radio wave is transmitted from the wearable device will be described.

[0093] The radio wave transmitter / receiver constituting the radio wave transmitting / receiving means functions as an angle detection means. The angle detection means is equipped with radio wave detection means a, b, ... arranged side by side (see Fig. 12 (A) and (B)). In Fig. 12, the distance between the radio wave detection means is exaggerated for ease of understanding. Each radio wave detection means receives the transmitted radio wave as the location-specific radio wave at a different position within one radio wave transmitter / receiver.

[0094] A single radio wave indicating the device ID emitted from the wearable device is detected by each radio wave detection means with a time difference. Specifically, because the receiving position of radio wave detection means a is closer than that of radio wave detection means b, a time difference (phase difference of radio waves) occurs between the receiving time Ta of radio wave detection means a and the receiving time Tb of radio wave detection means b (see FIG. 12(C)).

[0095] The angle detection means 81 (see FIG. 3) detects the angle of arrival of the location-specific radio wave when it enters the radio wave transmitting and receiving means from the time difference and the arrangement interval of the radio wave detection means based on the azimuth detection function of, for example, Bluetooth (registered trademark) 5.1. The angle of arrival is an azimuth angle consisting of the elevation and depression angles in the vertical direction and the direction angle in the horizontal direction.

[0096] The PC 90 acquires the terminal ID, the angle of arrival, and the radio wave transmitter / receiver ID indicated in the position-specifying radio wave from the radio wave transmitter / receiver means via the communication means. The position of the radio wave transmitter / receiver ID stored in the radio wave transmitter / receiver information storage means of the storage means 92 is called, and the position of the wearable device is identified from the position of the radio wave transmitter / receiver ID and the acquired angle of arrival by the position identification means performed by the processing means 91. When there is one radio wave transmitter / receiver, the position of the wearable device can be identified as being at waist height of the person in the direction of the angle of arrival.

[0097] In both examples 1 and 2, the description was given using a wearable terminal, but the same applies to a temporary tag. Also, the description was given of an active method in which the wearable terminal is used as the starting point to emit radio waves, but it goes without saying that the same applies to a passive method. By being able to identify the position of the wearable terminal, it is possible to track which genuine user the accompanying person 51 shown in the image captured by the image capture means is trying to accompany.

[0098] (others) The embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. The technical scope of the present invention is not limited to the above description but is indicated by the claims, and is intended to include all modifications within the meaning and scope of the claims. It goes without saying that the use of the controlled area to which the entrance control system 1 is applied is not limited to a clean room. The admission management system does not need to execute all of the flows shown in the embodiments; it is sufficient to execute the flows as indicated by the claims and within the meaning and scope equivalent to the claims. The admission control system 1 is not limited to a PC and may be processed in the cloud. [Explanation of symbols]

[0099] 1...Admission control system, 10: clean room, 20: anteroom, 30: second clean room, 40: door, 50...user, 51...companion, 60...wearable terminal, 70...image acquisition means, 80, 80α, 80β, 80γ...radio wave transmitting and receiving means, 81...angle detecting means, 82...Radio wave detection means, 83...Warning display, 90...PC, 91...processing means, 92...storage means, 100: Communication means, 110: Temporary tag

Claims

1. In an entrance control system for controlling entrance to a controlled area, The facility includes a means for acquiring the number of people expected to enter, a biometric information acquiring means, a user determining means, a means for acquiring the number of genuine users, a tailgating determining means, and a biometric information storing means, The biometric information storage means stores biometric determination information of a genuine user in advance, The expected number of visitors acquisition means is an image acquisition means and an image analysis means, The image acquisition means acquires an image of an entrant at an entrance to the controlled area, The image analysis means analyzes the visitor image and obtains the number of people expected to enter at the entrance / exit; the biometric information acquisition means acquires biometric information of a user entering a controlled area at the entrance; The user determination means collates the biometric information with the biometric determination information to determine whether the user is an authorized genuine user; The genuine user number acquisition means acquires the number of genuine users, The tailgating determination means When the number of people planning to enter is equal to the number of genuine users, it is determined that there is no tailgating, and when the number of people planning to enter exceeds the number of genuine users, it is determined that there is tailgating. The entrance management system is characterized by the following.

2. Including wearable devices, the wearable terminal functions as the biometric information acquisition means and the user determination means, and also functions as the biometric information storage means; The biometric information acquisition means continuously acquires biometric information of a user, The user determination means collates the biometric information with the biometric determination information to determine whether the user is a genuine user. The admission control system according to claim 1 .

3. Further, the device includes a location specifying means and a radio wave transmitting and receiving means, the radio wave transmitting and receiving means is provided at the entrance and serves as an angle detecting means for detecting an angle of arrival of a position specifying radio wave from the wearable device; The location-specifying radio wave is at least one of an outgoing radio wave originating from the wearable device and a response radio wave originating from the wearable device in response to a second outgoing radio wave originating from the radio wave transmitting and receiving means; The angle detection means includes a plurality of radio wave detection means, Each of the radio wave detection means is arranged side by side and receives the same position specifying radio wave; the angle detection means detects the angle of arrival of the position specifying radio wave based on a time difference at which each of the radio wave detection means receives the position specifying radio wave; the position identification means identifies the position of the wearable device based on a position where the radio wave transmitting and receiving means is provided and the arrival angle; 3. The admission control system according to claim 2.

4. It also includes a temporary tag, The temporary tag transmits the location-specifying radio wave in the same manner as the wearable device; the angle detection means detects an angle of arrival of the location specifying radio wave based on a time difference at which each of the radio wave detection means receives the location specifying radio wave from the temporary tag; the position identification means identifies the position of the temporary tag based on the position where the radio wave transmitting and receiving means is installed and the arrival angle; 4. The admission control system according to claim 3.

5. The present invention further includes a position specifying means and three or more radio wave transmitting and receiving means arranged to form a triangle, The radio wave transmitting and receiving means receives a location specifying radio wave from the wearable device, The location-specifying radio wave is at least one of an outgoing radio wave originating from the wearable device and a response radio wave originating from the wearable device in response to a second outgoing radio wave originating from the radio wave transmitting and receiving means; the radio wave transmitting and receiving means receives the position specifying radio wave and also functions as a radio wave measuring means, The radio wave measuring means measures a radio wave intensity value or a receiving time of the location specifying radio wave, The position identification means identifies the position of the wearable device based on the three or more received radio wave intensity values ​​or the reception times.

3. The admission control system according to claim 2.

6. It also includes a temporary tag, The temporary tag transmits the location-specifying radio wave in the same manner as the wearable device; The radio wave measuring means measures the radio wave intensity value or the reception time of the location specifying radio wave from the temporary tag, the location identification means identifies the location of the temporary tag based on three or more of the radio wave intensity values ​​or the reception times; The admission control system according to claim 5 .

7. The facility further includes an allowable number of visitors setting means, a number of visitors acquisition means, and an admission restriction means, The allowable number of visitors setting means sets an allowable number of visitors that can stay in the controlled area, The visitor number acquisition means acquires the number of visitors in the managed area, The entrance restriction means does not open the door of the entrance when the number of visitors is not less than the permitted number of visitors. The admission control system according to any one of claims 1 to 6.

8. Further, a means for acquiring the number of people planning to stay is included, The means for acquiring the number of people planning to stay acquires a sum of the number of people planning to enter and the number of people staying, When the entry restriction means determines that the sum exceeds the allowable number of visitors, it displays a warning. The admission control system according to claim 7 .

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