JP2010059648A - Air shower system with authentication function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air shower system with an authentication function easily operable for authentication and increased in convenience while maintaining high safety by preventing tailgating. <P>SOLUTION: The air shower system includes an air shower room 2 having an entrance door and an exit door, a weighing machine 27 for measuring the weight of a person who enters in the air shower room 2, a receiving terminal 60 for receiving the identification information which is output from a WCU 30 worn by the person in the air shower room for uniquely identifying the person in the air shower room or the WCU 30, and an authentication management device 40 in which the weight of the person in the air shower room and the identification information are stored correspondingly to each other. The authentication management device 40 locks the exit door, locks the entrance door after the person enters in the air shower room 2 through the entrance door, determines whether the person in the air shower room is authenticated or not based on a weight corresponding to the identification information received by the receiving terminal 60 and the weight of the person in the air shower room measured by the weighting machine 27, and unlocks the exist door when the person in the air shower room is determined to be authenticated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air shower system that injects air to a room occupant, and more particularly to an air shower system with an authentication function having a function of authenticating a room occupant.

  Conventionally, as a front room of a clean room or the like of a pharmaceutical factory or a semiconductor manufacturing factory, an air shower room for removing hair, dust or the like adhering to a person entering the clean room is provided. It has been proposed that such an air shower room is provided with a function of authenticating an occupant so that only authorized occupants can pass through the air shower room.

  As an authentication method, a person who is allowed to enter the room has an authentication device such as an ID card that stores an ID for uniquely identifying the person entering the room, and enters and exits the air shower room. The ID stored in the ID card is read by a card information reading device or the like, and the read ID is collated with a previously registered ID.

  However, in such an authentication method using an ID card, if a third party who is not permitted to enter and exit obtains the ID card by some improper means, the third party will be a legitimate resident of the ID card. There is a risk that it becomes possible to impersonate and enter and leave the room.

  For this reason, in order to avoid such a problem, a biometric authentication technique for performing personal authentication using biometric information that is a characteristic of the person's own human body instead of the ID information of the ID card has been put into practical use. . Examples of the biometric authentication include fingerprint authentication using a fingerprint as biometric information, vein authentication using a vein as biometric information, and face authentication using a face image and using a feature amount of the face image as biometric information. Such a biometric authentication technique can prevent impersonation of a legitimate person by an unauthorized third party (see, for example, Patent Document 1).

JP2008-1231312

  However, with such biometric authentication technology, the biometric information of the occupant is used for authentication, so fingerprint authentication cannot be performed if the occupant is wearing gloves when entering or leaving a clean room or the like. Face authentication cannot be performed when wearing a mask or sunglasses. For this reason, in such a case, there is a problem that the room occupant has to put on and take off wearing items such as gloves and sunglasses every time authentication is performed.

  Furthermore, with conventional ID card authentication and biometric authentication, it is not possible to prevent so-called companionship, in which a third party illegally enters or leaves a room by conspiring with a person who is allowed to enter the room. In other words, a room admitted person can enter and leave with a third party by performing authentication using a legitimate ID card or biometric information, and ensure security safety. It may not be possible.

  The present invention has been made in view of the above, and has an authentication function capable of improving convenience by simplifying an operation during authentication while maintaining high safety by preventing co-accompaniment. An object is to provide an air shower system.

  In order to solve the above-mentioned problems and achieve the object, the air shower system with an authentication function according to claim 1 is capable of injecting air to a person entering the room, and includes an entrance door and an exit door. Output from the air shower room, the body weight measuring means for measuring the weight of the person entering the air shower room, and the portable authentication terminal worn by the person entering the air shower room Receiving means for receiving identification information for uniquely identifying the occupant or the mobile authentication terminal, and storage means for storing the weight of the occupant and the identification information in association with each other And locks the exit door, locks the entrance door after the occupant enters the air shower room from the entrance door, and corresponds to the identification information received by the receiving means The storage means And determining whether or not the occupant can be authenticated based on the acquired body weight and the weight of the occupant measured by the weight measuring means, and if it is determined that authentication is possible, the exit door is And a control means for unlocking.

  The air shower system with an authentication function according to claim 2 is the air shower system with an authentication function according to claim 1, wherein the control means receives the plurality of pieces of identification information by the receiving means. The person corresponding to each of the plurality of pieces of identification information is acquired from the storage means, and the total value of the acquired weights is calculated, and the calculated weight and the occupant measured by the weight measuring means And determining whether or not the occupant can be authenticated based on the body weight.

  The air shower system with an authentication function according to claim 3 is the air shower system with an authentication function according to claim 2, wherein the control means is based on a reception position and a reception number of the identification information by the reception means. The position or number of persons entering the air shower room is determined, and the injection of air in the air shower room is controlled based on the determined position or number of persons entering the room.

  The air shower system with an authentication function according to claim 4 is the air shower system with an authentication function according to any one of claims 1 to 3, and is carried by the person who enters the air shower room. An authentication terminal, wherein the mobile authentication terminal detects the presence or absence of the mobile authentication terminal attached to the room occupant, and the mobile authentication terminal or the room occupant wearing the mobile authentication terminal. Based on the detection result of the identification information storage means for uniquely identifying identification information and the attachment detection means, the attachment of the portable authentication terminal by the occupant continues after the activation of the portable authentication terminal. It is determined whether or not the identification information stored in the identification information storage means is stored on the condition that the mounting is continuously performed after the activation. Mobile authentication terminal side human body communication means for transmitting to the receiving means by human body communication using a person as a medium, and the receiving means transmits the identification information transmitted from the mobile authentication terminal side human body communication means by human body communication. The authentication operation terminal side human body communication means is received.

According to the air shower system with an authentication function according to claim 1, since whether or not to authenticate the occupant is determined based on the weight corresponding to the identification information and the weight measured by the weight measurement means,
For example, if a person who is allowed to enter the room and holds a single ID card, together with a third party who is not permitted to enter the room, enter the air shower room together. Since the weight does not match the weight of the person entering the room, it is possible to reliably prevent unauthorized companion, such as determining that entry into the management area is not permitted.

  Moreover, according to the air shower system with an authentication function according to claim 2, even when a plurality of admitted persons entering the air shower room enter the air shower room at the same time, authentication based on the weight of each resident is collectively performed. Since it can be performed, a plurality of persons can pass through the air shower room at the same time, and the passage efficiency of the air shower room can be increased.

  In addition, according to the air shower system with an authentication function according to claim 3, since the ejection of air in the air shower room is controlled based on the position or number of persons entering the room, the air flow is controlled according to the position or number of persons entering the room. The state of injection can be optimized, and the efficiency of air injection and the accuracy of weight measurement can be improved.

Moreover, according to the air shower system with an authentication function according to claim 4, from the portable authentication terminal, on condition that the wearing of the portable authentication terminal by the occupant is continuously performed after the activation of the portable authentication terminal. The identification information is transmitted and the occupant is authenticated based on this identification information, so if a third party other than the legitimate resident removes the mobile authentication terminal from the occupant and performs authentication, the authentication information Since the authentication is not passed because it is not transmitted, spoofing by a third party can be prevented, and the reliability of the authentication can be improved.
Further, since the occupant is authenticated based on the identification information transmitted from the mobile authentication terminal, the authentication work can be performed with the mask and gloves on, and the authentication work can be simplified. . Furthermore, since the authentication is performed by a natural operation when the room occupant touches the receiving terminal, it is possible to perform the authentication without interrupting the work and thinking of the room occupant.

  Hereinafter, an embodiment of an air shower system with an authentication function according to the present invention will be described in detail with reference to the accompanying drawings. First, the configuration and processing contents of the present embodiment will be described, and then a modification to the present embodiment will be described. However, the present invention is not limited by the present embodiment.

(Constitution)
Initially, the structure of the air shower system which concerns on this Embodiment is demonstrated. FIG. 1 is a side view of an air shower chamber to which the air shower system according to the present embodiment is applied and its surroundings, and FIG. 2 is a plan view of FIG. The authentication station 1, the air shower room 2, and the management area 3 are arranged so as to be adjacent to each other in the illustrated order. The authentication station 1 performs activation processing of a wearable authentication unit 30 (Wearable Certificate Unit, hereinafter referred to as “WCU”, not shown in FIGS. 1 and 2), and the weight of the person who enters the air shower room 2. This is the registration area. The air shower room 2 is an area for injecting air to a person who has entered the air shower room 2, and is configured in the same manner as the known air shower room 2 except for the parts specifically described below. The management area 3 is an area in which only authorized persons can enter, for example, a clean room of a pharmaceutical factory or a semiconductor manufacturing factory.

  The configuration of the air shower chamber 2 will be described in more detail. 3 is a cross-sectional view of the air shower chamber 2 of FIG. As shown in FIGS. 1 to 3, the air shower room 2 is a closed space surrounded by an entrance door 20, an exit door 21, a side wall part 22, a ceiling part 23, and a floor part 24. Is an area that allows multiple people (at least 2 people) to enter the room at the same time. Opening and closing of the entrance door 20 and the exit door 21 are controlled by an electronic lock (not shown). The side wall portion 22 and the ceiling portion 23 are provided with chambers 22a and 23a, and a blower 25 is disposed below the chamber 22a of the side wall portion 22. As the blower 25, a blower that can change and control the blown amount in two stages is used. After the air blown from the blower 25 is purified through the filter 26, the air outlet 22b provided in the side wall portion 22 and the air outlet 23b provided in the ceiling portion 23 via the chambers 22a and 23a. From, it is injected toward the closed space. In addition, the ventilation from these blower outlets 22b and 23b is controllable by the damper which is not shown in figure.

  A scale 27 is incorporated in the floor 24 of the air shower chamber 2. The weight scale 27 corresponds to the weight measuring means in the claims. Specifically, the floor plate 24a of the floor portion 24 is movable up and down, and the load cell 27a is disposed below the floor plate 24a. Then, the weight of the occupant on the floor board 24a is measured by the load cell 27a, and this measured value is transmitted to the authentication management device 40 described later via the receiving terminal 60 described later. In addition, a plurality of human body communication units 65a of a receiving terminal 60, which will be described later, are arranged in parallel above the scale 27, and human body communication can be performed with a occupant on the human body communication unit 65a. It has become.

  FIG. 4 is a block diagram for explaining an overview of the air shower chamber 2 and the devices disposed in the vicinity thereof. The air shower system according to the present embodiment includes a WCU 30 that is attached to a resident and brought into the authentication station 1 or the air shower room 2, an authentication management device 40 and a weight scale 50 disposed in the authentication station 1, and an air shower. The receiving terminal 60 arranged in the room 2 and the above-described weight scale 27 are provided.

  The WCU 30 is detachably attached to a room occupant (authenticated person), and periodically transmits a unit ID for uniquely identifying the WCU 30 by human body communication using the room occupant as a medium. This corresponds to the portable authentication terminal in the claims.

  The authentication management device 40 performs identity authentication of the room occupant based on the biometric information (hereinafter referred to as “human body ID”) of the room occupant input from the room occupant and is connected to the receiving terminal 60 for authentication management. Is what you do.

  The weight scale 50 is a weight measurement means for measuring the weight of the occupant, and is configured in the same manner as a known weight scale except for the parts specified below.

  The receiving terminal 60 receives the unit ID transmitted from the WCU 30 through human body communication, and authenticates the occupant wearing the WCU 30 based on the unit ID. Corresponds to the means.

  Between the WCU 30 and the authentication management device 40 configured as described above, or between the WCU 30 and the receiving terminal 60, human body communication is performed using a room occupant wearing the WCU 30 as a medium. Human body communication is a technique for performing short-range data communication by using the human body as a communication medium by applying the property that a human body passes a weak current. Specifically, by using changes in the body current of the human body or by sending a current that is harmless to the human body from the device on the transmission side, the body current is changed, and by reading the change on the device on the reception side, Realize communication.

  In addition, the WCU 30 and the authentication management device 40 can communicate by wireless communication. Also, between the authentication management device 40 and the weight scale 50, between the authentication management device 40 and the receiving terminal 60, or between the weight scale 50 and the receiving terminal 60, wireless or wired (for example, Internet or LAN: (Including a network such as Local Area Network). Note that any wireless communication including optical communication, radio wave communication, or acoustic wave communication can be performed as the wireless communication.

  The upper part of FIG. 4 shows the outline of the authentication process when the WCU 30 is activated, and the lower part shows the outline of the authentication process when the WCU 30 is used. When the WCU 30 is started up, a user enters the WCU 30 at the authentication station 1 and then the user enters his / her human body ID (biological information) into the authentication management device 40. The authentication management device 40 uses the human body ID (biological information). ) To authenticate the occupants. When the authentication is cleared, the WCU 30 is activated by an activation signal from the authentication management device 40. “Activate the WCU 30” means that the WCU 30 is in a state in which the unit ID can be transmitted. That is, after being activated, the WCU 30 transmits the unit ID stored in the WCU 30 to the authentication management apparatus 40 by human body communication. The authentication management device 40 registers the received unit ID. In addition, the user measures his / her body weight with the weight scale 50, and the weight is registered in the authentication management apparatus 40 in association with the unit ID.

  When using the WCU 30, a person wearing the WCU 30 enters the air shower room 2, and performs human body communication with the human body communication unit 65 a of the receiving terminal 60 and the WCU 30, thereby transmitting the unit ID to the receiving terminal 60. The receiving terminal 60 transmits the received unit ID to the authentication management device 40. Further, the weight of the user is measured by the weight scale 27 in the air shower chamber 2, and this weight is transmitted to the authentication management device 40 via the receiving terminal 60. The authentication management device 40 authenticates the occupant based on whether or not the combination of the unit ID and the weight thus transmitted matches the combination of the unit ID and the weight registered in the authentication process. Based on the authentication result, a predetermined process such as automatically unlocking the exit door 21 of the air shower chamber 2 is performed.

(Configuration-WCU)
Next, details of the authentication system of the present embodiment will be described. First, the configuration of the WCU 30 will be described. FIG. 5 is a block diagram functionally conceptually showing the configuration of the WCU 30. The WCU 30 includes a contact sensor 31, a human body communication unit 32, a communication unit 33, a control unit 34, an input unit 35, an output unit 36, and a ROM (Read Only Memory) 37.

  The contact sensor 31 is an attachment detection unit that detects whether or not the WCU 30 is attached to a room occupant. The contact sensor 31 is configured by combining, for example, a temperature sensor and a pulse sensor, and is a case where a body temperature within a predetermined range is detected by the temperature sensor, and a pulse within a predetermined range is detected by the pulse sensor. If it is detected, it is detected that the WCU 30 is attached to the occupant. The contact sensor 31 has a function of detecting whether or not the WCU 30 is continuously attached to the occupant. For example, body temperature detection by the temperature sensor and pulse detection by the pulse sensor are performed for a predetermined time or more. If it is interrupted, it is determined that the WCU 30 has been removed from the occupant. Alternatively, the contact sensor 31 monitors the state of the wristband for attaching the WCU 30 to the occupant on the wrist, and when the wristband lock mechanism is released or the wristband drawer length is When the outer length of the wrist exceeds a predetermined length that allows the hand to pass, it is determined that the WCU 30 has been removed from the person entering the room. The contact sensor 31 outputs a signal including these detection results and determination results to the control unit 34.

  The human body communication unit 32 is a communication module that performs human body communication. Based on the detection result of the contact sensor 31, the human body communication unit 32 determines whether or not the WCU 30 is continuously worn by the room occupant after the WCU 30 is activated, and the wearing is continued after the activation. The unit ID stored in the ROM 37 is transmitted to the authentication management device 40 and the receiving terminal 60 by human body communication using the room entrant as a medium.

  The communication unit 33 is a wireless communication module that receives an activation signal from the authentication management device 40 and transmits / receives various other information to / from the authentication management device 40.

  The control unit 34 is a control unit that controls the entire WCU 30, and includes, for example, a CPU (Central Processing Unit) and a program that is interpreted and executed on the CPU.

  The input unit 35 is an input unit for inputting arbitrary information to the WCU 30, and is configured as a known input device such as an operation button, for example.

  The output unit 36 is an output unit for outputting arbitrary information to the outside of the WCU 30 and is configured as a known output device such as a liquid crystal display, for example.

  The ROM 37 stores a unit ID, which is identification information (authentication terminal identification information) for uniquely identifying the WCU 30, and corresponds to identification information storage means in the claims. However, the storage medium for storing the unit ID is arbitrary, and a fresh memory or the like can be used in place of the ROM 37. However, a storage medium or storage format in which the unit ID is not rewritten illegally may be adopted. Preferably, for example, the unit ID may be encrypted and stored in the ROM 37.

(Configuration-Authentication management device)
Next, the configuration of the authentication management device 40 will be described. FIG. 6 is a block diagram functionally conceptually showing the configuration of the authentication management apparatus 40. The authentication management device 40 includes a communication unit 41, an authentication unit 42, a biometric information input unit 43, a DB management unit 44, an authentication DB 45, a registration DB 46, and a reading device 47.

  The communication unit 41 is a communication unit that communicates information including a unit ID and a human body ID (biological information) with the authentication management device 40. The communication unit 41 is an activation signal transmitting unit that transmits an activation signal for activating the WCU 30 to the WCU 30.

  When the input of the human body ID (biological information) is received by the biometric information input unit 43, the authentication unit 42 determines whether or not the occupant can be authenticated based on the human body ID (biological information). Is an authentication setting means for transmitting an activation signal to the WCU 30 via the communication unit 41.

  The biometric information input unit 43 is a room occupant identification information input unit that accepts input of room occupant identification information for uniquely identifying a room occupant. Here, the occupant identification information is the occupant's human body ID (biological information), and the biometric information input unit 43 scans fingerprint information as the human body ID (biological information) or the human body ID (biological information). The camera etc. which image the face image.

  The DB management unit 44 is registration means for referring to and registering data with respect to the authentication DB 45 and the registration DB 46.

  The authentication DB 45 is an activation availability information storage unit storing unit that stores authentication information for authenticating a room occupant. A configuration example of this authentication information is shown in FIG. The authentication information is configured by associating human body ID (biological information) that is identification information for uniquely identifying a room occupant and activation availability information indicating whether the WCU 30 can be activated (authentication of authentication information). Yes.

  The registration DB 46 in FIG. 6 is a storage unit that stores registration information related to devices used by a room occupant. A configuration example of this registration information is shown in FIG. The registration information is configured by associating the human body ID, the unit ID, and the weight with each other.

  The reading device 47 in FIG. 6 is a reading unit that reads a unit ID from the WCU 30, and includes a human body communication unit 47a. The human body communication unit 47a is a human body communication unit that receives the unit ID transmitted from the human body communication unit 32 of the WCU 30 through human body communication through human body communication.

(Configuration-receiving terminal)
Next, the configuration of the receiving terminal 60 will be described. FIG. 8 is a block diagram functionally conceptually showing the configuration of the receiving terminal 60. The receiving terminal 60 includes a communication unit 61, a control unit 63, a display unit 64, and a reading device 65.

  The communication unit 61 is a receiving terminal side communication unit that communicates information including the unit ID with the authentication management apparatus 40. The communication unit 61 is a communication module that performs transmission and reception by wireless communication with the WCU 30.

  The control unit 63 executes predetermined control processing and display processing based on the control signal and display information received from the authentication management device 40. As such processing, for example, opening / closing control of the exit door 21 based on entry permission / denial is performed.

  The display unit 64 displays various types of information to a room occupant, and corresponds to, for example, a liquid crystal display.

  The reading device 65 reads the unit ID from the WCU 30, and specifically includes a plurality of human body communication units 65a. The plurality of human body communication units 65a are receiving terminal side human body communication means for receiving a unit ID from the WCU 30 through human body communication using a room occupant as a medium. Specifically, each of the plurality of human body communication units 65a is configured as a communication antenna.

  The receiving terminal 60 can be configured as an authentication-dedicated device that only performs authentication of a room occupant, but is configured by adding a function for performing authentication of a room occupant to a known device operated by the room occupant. Also good. In the following embodiment, the receiving terminal 60 is a door control device that performs opening / closing control of the exit door 21 of the air shower room 2, and the control unit 63 touches the receiving terminal 60 so that the control unit 63 has the human body ID. The door opening / closing control is performed according to the control signal based on. However, the example of the receiving terminal 60 is not limited to these, and can be configured to perform arbitrary processing control.

(Processing-Start processing)
Next, the authentication process by the air shower system comprised as mentioned above is demonstrated. First, the activation process of the WCU 30 will be described. FIG. 9 is a flowchart of activation processing of the WCU 30. As a premise of this process, it is assumed that the information shown in FIG. 7A is stored in advance in an arbitrary method in the authentication DB 45 of the authentication management apparatus 40.

  The resident enters the authentication station 1 and performs the process of mounting and starting the WCU 30. The authentication station 1 is provided with a monitor who visually monitors the fact that the room occupant has attached the WCU 30. Under the supervision of the monitor, when the occupant wears the WCU 30 and turns on the power of the WCU 30, the contact sensor 31 starts continuous monitoring of the presence or absence of contact detection between the occupant and the WCU 30 (step SA- 1) When this contact is detected (step SA-1, Yes), a contact detection signal is output to the control unit 34. The control unit 34 that has received the output of the contact detection signal puts the WCU 30 in a waiting state for receiving the activation signal from the authentication management device 40 (step SA-2).

  Next, when the person entering the room inputs his / her human body ID (biological information) through the biometric information input unit 43 of the authentication management apparatus 40 while wearing the WCU 30 (step SA-3, Yes), the authentication unit 42 Acquires from the authentication DB 45 pre-set activation availability information corresponding to the input human body ID (biological information), and determines whether activation of the WCU 30 is permitted based on this activation availability information If it is not permitted (step SA-4, No), the process returns to step SA-3, and if it is permitted (step SA-4, Yes), the communication unit 41. Then, a predetermined activation signal is wirelessly transmitted to the WCU 30 (step SA-5).

  The control unit 34 of the WCU 30 that has received this activation signal via the communication unit 33 (step SA-2, Yes) activates the WCU 30 and sets the unit ID stored in its own ROM 37 by the human body communication unit 32. A state of waiting for human body communication that can be transmitted by human body communication is set (step SA-6). Thereafter, when the occupant measures the weight with the weight scale 27 while wearing the WCU 30, the measured weight is transmitted from the weight scale 27 to the authentication management device 40 (step SA-7). When the weight is transmitted from the scale 27 (step SA-8, Yes), the DB management unit 44 of the authentication management apparatus 40 associates the weight with the human body ID and unit ID of the room occupant and registers the registration DB 46. (Step SA-9). The identification method of the human body ID and unit ID at this time is arbitrary. For example, when a human body communication unit is provided in the weight scale 27 and a room occupant wearing the WCU 30 contacts the human body communication unit, the weight scale 27 The unit ID is transmitted to the authentication management device 40 from the weight scale 27, whereby the unit ID of the room occupant is specified in the authentication management device 40, and the human body ID corresponding to this unit ID is assigned to the authentication DB 45. May be obtained from This completes the startup process of the WCU 30.

  After contact is detected in step SA-1, the wearing state of WCU 30 for the occupant is continuously monitored by contact sensor 31 (step SA-10), and the wearing is continuously performed. As long as the unit ID can be transmitted, the contact sensor 31 detects that the unit ID can be transmitted but that the attachment is not continuously performed (the WCU 30 has been at least temporarily removed from the occupant). In the case (step SA-10, Yes), the unit ID transmission enable state is reset, and the transmission of the unit ID is stopped (step SA-11). In this case, the unit ID is not transmitted to the receiving terminal 60 even if human body communication is performed in the use process described later unless the room occupant again wears the WCU 30 under the supervision of the monitoring staff. Therefore, it becomes impossible to authenticate the resident. Therefore, even when the room entrant passes the WCU 30 to a third party after the WCU 30 is activated, impersonation by the third party can be prevented.

(Processing-Usage processing)
Next, usage processing of the WCU 30 activated in this way will be described. 10 and 11 are flowcharts of the use processing of the WCU 30. FIG. The authentication management device 40 monitors whether or not a resident has entered the air shower room 2 (step SB-1). The method for determining whether or not the user enters the room is arbitrary. For example, when a person entering the WCU 30 touches the human body communication unit 65a of the receiving terminal 60 arranged in the air shower room 2, the human body communication unit 32 of the WCU 30 The unit ID is transmitted to the human body communication unit 65 a of the receiving terminal 60 by human body communication, and this unit ID is transmitted to the communication unit 41 of the authentication management apparatus 40 via the communication unit 61. The authentication management device 40 determines that the person entering the room has entered the air shower room 2 when the unit ID is transmitted in this way. Alternatively, the determination may be made based on the output from the scale 27 of the air shower room 2 or based on the output from a known human sensor provided in the air shower room 2.

  When the resident enters the room (SB-1, Yes), the authentication management device 40 locks the room door 20 by transmitting a control signal to the electronic lock of the room door 20 (step SB-2). The position and the number of people entering the room are determined (step SB-3). The position of the room occupant can be determined, for example, by specifying the position of the human body communication unit 65a that has performed human body communication with the WCU 30. However, the position of the occupant may be specified by any other method. For example, the position of the occupant is specified by capturing the inside of the air shower room 2 with a camera and analyzing the captured image. May be. Although the method for determining the number of people entering the room is arbitrary, for example, as described above, the number of unit IDs transmitted from the human body communication unit 32 of the WCU 30 to the human body communication unit 65a is used as the number of people entering the room. In other words, here, when there are a plurality of occupants, it is assumed that each occupant touches the human body communication unit 65a, and a unit ID corresponding to the number of occupants is transmitted to the authentication management device 40. Therefore, the number of people entering the room can be determined based on the number of transmissions of the unit ID. In addition, when a person enters the air shower room 2 in this way, weight measurement by the weight scale 27 is automatically started.

  If there is only one person entering the room (step SB-4, Yes), the authentication management device 40 waits until the weight measurement is completed (step SB-5), and if the weight measurement is completed (step SB-5). SB-5, Yes), the measured weight is transmitted to the communication unit 41 of the authentication management apparatus 40 via the communication unit 61 of the receiving terminal 60. The authentication unit 42 of the authentication management device 40 acquires the weight corresponding to the unit ID transmitted in step SB-1 from the registration DB 46, and the acquired weight and the weight measured inside the air shower chamber 2 are obtained. Then, it is determined whether or not they match each other (step SB-6). If the weights do not match (step SB-6, No), it is determined that there is a possibility that a third party other than the permitted room occupant is linked, and is received via the communication unit 41. By transmitting a control signal to the communication unit 61 of the terminal 60, an error message is displayed on the display unit 64 (step SB-7), and the entrance door 20 is unlocked to prompt the resident to leave the room (step SB). -8).

  On the other hand, when the weights match (step SB-6, Yes), it is determined that there is no possibility that a third party other than the permitted room resident is linked, and the blower 25 of the air shower room 2 is used. And the damper which is not shown in figure of the blower outlets 22b and 23b is controlled, and air is injected from the blower outlets 22b and 23b nearest to the position of the occupant determined in Step SB-3 (Step SB-9). Here, since it is considered that there is only one person entering the room and a small amount of air flow (air circulation amount) is sufficient, air is injected at a low pressure. Then, such air injection is continued until the predetermined air injection time has elapsed (step SB-10), and when the predetermined air injection time has elapsed (step SB-10, Yes), the air injection is stopped. (Step SB-11).

  Thereafter, the authentication unit 42 of the authentication management device 40 unlocks the exit door 21 and allows the room entry person to enter the management area 3 (step SB-12), and assumes that the room entry person has entered the management area 3. After the predetermined time has elapsed (step SB-13, Yes), the exit door 21 is locked (step SB-14), the entrance door 20 is unlocked (step SB-15), and the next entry People can enter.

  On the other hand, when it is determined in step SB-3 that there are a plurality of persons entering the room (step SB-4, No), steps SB-16 to SB-22 are performed. Since these processes are almost the same as steps SB-5 to SB-10, the description thereof is omitted. However, after the weight measurement is completed (step SB-16, Yes), the plurality of processes transmitted in step SB-1 are performed. A plurality of body weights corresponding to the unit ID are obtained from the registration DB 46, the total of the plurality of body weights is obtained (step SB-17), and the total body weight and the body weight measured inside the air shower chamber 2 are obtained. Then, it is determined whether or not they match each other (step SB-18). And when a body weight corresponds (step SB-18, Yes), air is injected from the blower outlets 22b and 23b nearest to the position of the occupant determined at step SB-3 (step SB-21). Here, since it is considered that there are a plurality of occupants and the amount of air blown (air circulation amount) should be increased, air is injected at a high pressure. This completes the usage process.

(effect)
As described above, in this embodiment, whether or not a room occupant can be authenticated is determined based on the body weight corresponding to the identification information and the body weight measured by the weight scale 27. If a resident who holds one WCU 30 enters the air shower room 2 together with a third party who is not permitted to enter the room, the weight of these multiple persons does not match the weight of the resident. Unauthorized companionship can be reliably prevented, for example, it can be determined that entry into the management area 3 is not permitted.

  Further, even when a plurality of visitors who are permitted to enter the room enter the air shower room 2 at the same time, authentication based on the weight of each person entering the room can be collectively performed. Passage is possible, and the passage efficiency of the air shower chamber 2 can be increased.

  In addition, since the air injection in the air shower room 2 is controlled based on the position and number of persons entering the room, the air injection can be optimized according to the position and number of persons entering the room, and the efficiency of air injection and accurate weight measurement can be improved. It becomes possible to improve the nature.

Further, since the unit ID is transmitted from the WCU 30 on the condition that the installation of the WCU 30 by the occupant is continuously performed after the activation of the WCU 30, the occupant is authenticated based on the unit ID. When a third party other than a room entrant removes the WCU 30 from the room entrant and authenticates, the authentication information is not transmitted and the authentication is not passed. The certainty can be improved.
Further, since the room occupant is authenticated based on the identification information transmitted from the WCU 30, the authentication work can be performed with the mask and gloves worn, and the authentication work can be simplified. Furthermore, if the receiving terminal 60 is provided at a position where the occupant naturally touches, the authentication is performed by a natural operation when the occupant touches the receiving terminal 60, so that authentication without interrupting the work and thoughts of the occupant. Can be performed.

[Modifications to Embodiments]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention are arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. be able to.

  For example, in the above embodiment, the occupant inputs the biometric information to the authentication management apparatus 40 and performs authentication. However, the human body ID (biometric information) such as a password is input to the authentication management apparatus 40 for authentication. You may comprise as follows.

  In the above embodiment, human body communication is performed using changes in the body current of the human body, but any method may be used as long as communication can be performed using the human body as a medium.

  In the above embodiment, the unit ID unique to the WCU 30 is used as the identification information transmitted from the WCU 30 to the receiving terminal 60. However, when the occupant inputs the human body ID (biological information) to the authentication management device 40. Alternatively, the human body ID (biological information) may be wirelessly transmitted from the authentication management device 40 to the WCU 30 and stored in the WCU 30, and the human body ID (biological information) may be transmitted to the receiving terminal 60 as identification information.

  Further, it is not always necessary to input the identification information of the room occupant to the receiving terminal 60 using the WCU 30. For example, a unit ID is recorded on an IC card in which a known RFID is embedded, and this unit ID is stored in the receiving terminal 60. May be read in a non-contact manner.

  Moreover, in the said embodiment, although air injection is controlled based on the position and the number of people of a room, you may control based only on either one of a position or the number of people. Moreover, the control content of the air injection based on the position and the number of people in the room can be changed. For example, the air injection time may be adjusted according to the number of people.

  Note that the problems to be solved by the invention and the effects of the invention are not limited to the above contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved.

It is a side view of the air shower room to which the air shower system concerning this embodiment is applied, and its circumference. It is a top view of FIG. It is AA arrow sectional drawing of the air shower chamber of FIG. It is a block diagram for demonstrating the outline | summary of the apparatus arrange | positioned in an air shower room and its periphery. It is a block diagram which shows the structure of WCU functionally. It is a block diagram which shows the structure of an authentication management apparatus functionally. (A) is a figure which shows the structural example of authentication information, (b) is a figure which shows the structural example of registration information. It is a block diagram which shows the structure of a receiving terminal functionally. It is a flowchart of the starting process of WCU. It is a flowchart of a utilization process of WCU. FIG. 11 is a flowchart of WCU utilization processing continued from FIG. 10.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Authentication station 2 Air shower room 3 Management area 20 Door for entrance 21 Door for exit 22 Side wall part 22a, 23a Chamber 22b, 23b Outlet 23 Ceiling part 24 Floor part 24a Floor board 25 Blower 26 Filter 27, 50 Weight scale 30 WCU
31 Contact sensor 32, 47a, 65a Human body communication unit 33, 41, 61 Communication unit 34, 63 Control unit 35 Input unit 36 Output unit 37 ROM
40 Authentication Management Device 42 Authentication Unit 43 Biometric Information Input Unit 44 DB Management Unit 45 Authentication DB
46 Registration DB
47, 65 Reading device 60 Receiving terminal 64 Display unit

Claims (4)

An air shower room that is capable of injecting air to a person entering the room, and having an entrance door and an exit door;
A weight measuring means for measuring the weight of a person entering the air shower room;
Receiving means for receiving identification information for uniquely identifying the person entering the room or the portable authentication terminal, the information being output from the portable authentication terminal worn by the person entering the air shower room When,
Storage means for storing the weight of the occupant and the identification information in association with each other;
Weight corresponding to the identification information received by the receiving means by locking the exit door and locking the entrance door after the occupant enters the air shower room from the entrance door Is acquired from the storage means, and whether or not the room occupant can be authenticated is determined based on the acquired body weight and the weight of the room occupant measured by the body weight measuring means. Control means for unlocking the exit door;
An air shower system with an authentication function. When the receiving unit receives a plurality of pieces of identification information, the control unit acquires a weight corresponding to each of the plurality of pieces of identification information from the storage unit, and also obtains a total value of the acquired weights. And determining whether or not the occupant can be authenticated based on the calculated weight and the weight of the occupant measured by the weight measuring means,
The air shower system with an authentication function according to claim 1. The control means determines the position or number of persons entering the air shower room based on the reception position and the number of receptions of the identification information by the receiving means, and based on the determined position or number of persons entering the room. Controlling the injection of air in the air shower chamber,
The air shower system with an authentication function according to claim 2. A portable authentication terminal attached to the resident to the air shower room,
The portable authentication terminal is
Wearing detection means for detecting whether or not the portable authentication terminal is attached to the occupant;
Identification information storage means for storing identification information for uniquely identifying the mobile authentication terminal or the occupant wearing the mobile authentication terminal;
Based on the detection result of the mounting detection means, it is determined whether or not the mobile authentication terminal is continuously mounted by the occupant after the mobile authentication terminal is started, and the mounting is continued after the start. Mobile authentication terminal-side human body communication that transmits the identification information stored in the identification information storage means to the receiving means by human body communication using the room occupant as a medium Means and
The receiving means includes
Comprising an authentication operation terminal side human body communication means for receiving the identification information transmitted by human body communication from the portable authentication terminal side human body communication means;
The air shower system with an authentication function according to any one of claims 1 to 3.

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