JP4954846B2 - Human body communication terminal device - Google Patents

Description

  The present invention relates to a technique for authenticating use authority of a cabinet or the like using human body communication.

  There exists a thing disclosed by patent document 1 as a human body communication terminal device. Patent Document 1 discloses a mode in which an RFID recording medium for performing human body communication is carried down from a person's neck.

JP 2005-27095 A

  However, due to the principle of human body communication, even if the human body communication terminal device is not attached to the human body, human body communication can be established if a communication path is established through some medium. For this reason, for example, when a human body communication terminal device that is not used is stored on a metal desk or storage, a person who does not have a human body communication terminal device is in a position close to the desk or storage. When the authentication device is touched, human body communication may be established using a metal desk, storage, or the like, a person touching the authentication device, or some space therebetween as a communication path. As a result, a person who should not be authenticated may be determined to pass the authentication result.

  Here, if a power switch is provided in the human body communication terminal device itself and the power switch is turned off when the human body communication terminal device is removed from the human body, the erroneous authentication as described above is prevented. However, in this case, the user may forget to turn off the power, and the erroneous authentication as described above cannot be reliably prevented.

  Therefore, an object of the present invention is to prevent a human body communication terminal device not attached to a human body from performing an erroneous authentication operation.

In order to solve the above-described problem, the human body communication terminal device according to the first aspect is a human body communication terminal device capable of performing human body communication with the authentication device and executing an authentication process, the human body communication electrode, A communication circuit unit that transmits and receives signals that can be transmitted through the human body communication electrode through the human body communication electrode, and a human body communication through the human body communication electrode and the communication circuit unit so that authentication processing can be executed. A human body communication authentication processing unit having an authentication control unit, a mounting member that can be detachably mounted on the human body, and an on / off switch provided on the mounting member, as the mounting member is removed from the human body. The human body communication authentication processing unit performs authentication processing in response to a change in the on / off state of the switch unit that is switched as the mounting member is removed from the human body. The switch unit is configured to be switchable to an unauthenticable state, and further includes an annular linear member that can be arranged around the neck through the head of the human body, and the switch unit is a pair of splits that can be combined and separated. It has a switch part, it is constituted so that on-off switching is possible according to those combined and separated states, and the pair of split switch parts are provided at intervals along the extending direction of the linear member, by division switch section coalesce, Ru der which a part by arrangeable around the neck a and the head around the not pass through annular portions of the linear member is formed.

A 2nd aspect is a human body communication terminal device which concerns on a 1st aspect, Comprising: The said switch part can continue an ON state in the state in which the said mounting member was mounted | worn with the said human body, and the said mounting member is the said It is configured to be able to be switched from an on state to an off state as it is removed from the human body, and in the state where the switch unit is turned on, power can be supplied to the human body communication authentication processing unit, and the authentication is enabled. In the state where the switching is enabled and the switch unit is turned off, the power supply to at least a part of the human body communication authentication processing unit is cut off and the authentication is disabled.

According to the human body communication terminal device according to the first aspect, the human body communication authentication processing unit includes a switch unit that is provided on the mounting member and that is switched on and off as the mounting member is detached from the human body. Is configured to be switchable to an unauthenticable state in which authentication processing cannot be performed in accordance with a change in the on / off state of the switch unit that is switched as the mounting member is removed from the human body. For this reason, the said human body communication authentication process part can be switched to an unauthenticable state with the said mounting member being removed from the said human body. Thereby, it can suppress more reliably that the human body communication terminal device which is not mounted | worn with a human body performs wrong authentication operation | movement.

Further, according to the second aspect, when the mounting member is removed from the human body, power supply to at least a part of the human body communication authentication processing unit is cut off and the authentication is disabled. Power consumption can be suppressed.

Further, according to the first aspect, the pair of split switch portions are provided at intervals along the extending direction of the linear member, and the pair of split switch portions are combined to form the linear member. An annular portion that can be disposed around the neck and cannot pass around the head is formed by a part of the head. For this reason, a human body communication authentication processing part can be made to perform an authentication process by uniting a pair of division | segmentation switch part in the state which has arrange | positioned the linear member around the neck. On the other hand, when removing the human body communication terminal device from the human body, it is necessary to separate the pair of split switch sections. In a state where it is removed from the human body, it can be switched to an unauthenticated state without forgetting, and it is possible to more reliably suppress a human body communication terminal device not attached to the human body from performing an erroneous authentication operation.

  Hereinafter, the human body communication terminal device according to the embodiment will be described.

<1. Overall configuration>
First, the overall configuration of an authentication system to which the human body communication terminal device is applied will be described. FIG. 1 is an explanatory diagram showing the overall configuration of the authentication system.

  This authentication system is a system for authenticating a lock object, and includes a human body communication terminal device 20 and an authentication lock device 50.

  The lock target is managed by switching between an unusable locked state and an available unlocked state. As such an object to be locked, an opening / closing part attached to the storage means, an entrance / exit of a room, an electric device, and the like are assumed. Here, description will be made assuming that the lock target is the door 12 of the cabinet 10 which is an opening / closing part as a storage means.

  The human body communication terminal device 20 is given to the user P of the system, and a personal identification ID associated with the user P is registered in the human body communication terminal device 20 in advance.

  The authentication lock device 50 is configured to be capable of human body communication with the human body communication terminal device 20 using the human body as a communication path. By performing communication with the human body communication terminal device 20, the human body communication terminal device It is determined whether or not the user P possessing the user 20 has the use authority. When it is determined that the user P has the use authority, the door 12 of the cabinet 10 that is the lock target is set to the unlocked state, that is, the usable state. . That is, the authentication lock device 50 has a function as an authentication device that performs authentication, and a function as a lock control device that controls switching between a locked state and an unlocked state of a lock target based on the authentication result. Yes.

  Describing a general method of using this system, a user P who uses this authentication system holds the human body communication terminal device 20 and stands in front of the door 12 of the cabinet 10, and the handle portion 12a of the door 12. Touch. Then, the authentication lock device 50 performs human body communication with the human body communication terminal device 20 to determine whether there is a usage right, and switches to the unlocked state when it is determined that the usage right exists. As a result, the user P can use the cabinet 10 by opening the door.

  Hereinafter, each part structure is demonstrated in detail.

<2. Human Body Communication Terminal>
2 is a diagram showing the overall configuration of the human body communication terminal device 20 with the connector portion 46 connected, FIG. 3 is a diagram showing the connector portion 46, and FIG. 4 is a human body communication with the connector portion 46 removed. 2 is a diagram illustrating an overall configuration of a terminal device 20. FIG.

  The human body communication terminal device 20 includes a human body communication terminal device main body 21 and a mounting member 40 for holding the human body communication terminal device main body 21 in a state of being mounted on a human body, and an authentication lock device 50. The authentication process described later can be executed by performing human body communication. Each of electrodes 22A and 22B, which will be described later, is composed of two flat plate-like conductive materials (hereinafter referred to as conductive plates) arranged opposite each other with a certain gap therebetween. An electric circuit is formed by electrostatically coupling with each other by electric charges moving through the gap between the two conductive plates. A human possesses such that one of the two electrodes formed of a pair of conductive plates faces the human body. This conductive plate is electrostatically coupled to the human body via a stray capacitance, whereby the electrode and the human body are electrically joined. The other conductive plate is electrostatically coupled to earth ground or the like through a stray capacitance, and thereby the electrode and the earth are electrically connected. Together, the human body and the earth are electrically connected, and communication is performed using this characteristic.

  The human body communication terminal device main body 21 has a configuration in which each electrical component for configuring a circuit to be described later is mounted on a substrate, and here, it is formed in a substantially rectangular card-like outer shape. A partial function as a human body communication authentication processing unit to be described later is incorporated in the human body communication terminal device main body unit 21.

  The mounting member 40 is a member configured to be detachably mounted on a human body. Here, the mounting member 40 includes a holder portion 42 as a holding portion and a linear member 44.

  The holder part 42 is formed so as to be able to hold the human body communication terminal apparatus main body part 21. Here, the holder part 42 is formed in a substantially rectangular case-shaped member that can accommodate the human body communication terminal apparatus main body 21 and has an accommodation space that opens upward, and the human body passes through the upper opening in the accommodation space. The communication terminal device main body 21 is formed to be detachable.

  The linear member 44 is formed in a substantially annular shape, and is connected, for example, through a hole formed in the upper end portion of the holder portion 42. Then, in a state where the main line member 44 is suspended so as to be disposed around the neck of the human body P, the holder portion 42 and the human body communication terminal device main body portion 21 held by the holder portion 42 are located around the front of the chest from the neck of the human body P. And is supported in a suspended manner.

  The length dimension of the linear member 44 is set larger than the length dimension around the head of a general human body, and is formed in an annular shape that can be disposed around the neck through the head of the human body. (See FIG. 4).

  In addition, one electrode 22A of two electrodes 22A and 22B, which will be described later, is positioned at an intermediate portion of the linear member 44 that is substantially equidistant from the connecting portion with respect to the holder portion 42, that is, on the opposite side of the holder portion 42. Arranged in position. The other electrode 22B is provided in the human body communication terminal device main body 21. When the human body communication terminal device 20 is attached to the human body as described above, one electrode 22A is disposed around the back of the neck of the human body, and the other electrode 22B is disposed in front of the human body. ing.

  The linear member 44 includes a pair of connector portions 46, a conductor portion 47, and a pair of conductor portions 48.

  The conductor portion 47 is disposed so as to connect the one electrode 22 </ b> A and the human body communication terminal device main body portion 21 along the linear member 44.

  In addition, a pair of connector portions 46 are respectively provided at intermediate portions of the two linear portions connecting the one electrode 22 </ b> A and the connecting portion to the holder portion 42 of the linear member 44. The pair of connector portions 46 includes a housing 46a that can be fitted and connected to each other and a terminal portion 46b that can be connected to each other (one is a male terminal and the other is a female terminal) (see FIG. 3). One terminal portion 46 b is connected to the human body communication terminal device main body portion 21 through one conductor portion 48 along the portion of the linear member 44, and the other terminal portion 46 b is a portion of the linear member 44. Is connected to the human body communication terminal device main body 21 through the other conductor 48. Then, by connecting the connectors 46 together (combining), mechanical connection is achieved by fitting connection between the housings 46a and connection between the terminal portions 46b. In addition, electrical connection is obtained by connecting both terminal portions 46b, and both conductor portions 48 are electrically connected. Further, by disconnecting (separating) the connector connections of both connector portions 46, the electrical connection of both terminal portions 46b is released, and the two conductor portions 48 are electrically disconnected from each other.

  That is, the pair of connector portions 46 function as a pair of split switch portions that can be combined and separated. The pair of connector portions 46 as a whole can be switched on and off in accordance with the combined and separated states of the pair of connector portions 46. Here, the enable switch 35 (switch which is turned on by combining and turned off by separation) Part).

  Thus, when the pair of connector portions 46 are connected to each other and turned on, a signal transmission path from an AND circuit 33 to a power supply control circuit 34 described later is formed.

  In addition, the pair of connector portions 46 can be kept on with the mounting member 40 mounted on the human body, more specifically, so as to be switched on and off as the mounting member 40 is removed from the human body. Thus, it is configured to be switched from the on state to the off state as the mounting member 40 is removed from the human body.

  Here, a configuration utilizing the fact that the dimension around the head of the human body is larger than the dimension around the neck is adopted. That is, the pair of connector portions 46 are provided at positions spaced along the extending direction of the linear member 44. Then, in a state where the pair of connector portions 46 are connected to each other, the other connector portion of the linear member 44 passes through the portion on the opposite side of the holder portion 42 (the portion on the one electrode 22A side) from the one connector portion 46. A relatively small annular part R leading to 46 is formed (see FIG. 2). The length dimension of the portion constituting the relatively small annular portion R of the linear member 44 is larger than the length dimension around the neck of a general human body and the length around the head of the general human body. It is set smaller than the dimensions. Thereby, the annular portion R can be arranged around the neck of the human body and cannot pass around the head. In the state where the connector connection between the connector portions 46 is removed, the linear member 44 can be disposed around the neck through the head of the human body. In this state, the annular portion R is disposed around the neck. In this way, the connector portions 46 can be connected to each other. Further, in a state where both the connector portions 46 are still connected to each other in this manner, the annular portion R cannot be removed from the neck through the head, and by removing the connector, the linear member 44 is removed from the neck. It can be removed from around through the head. As a result, the pair of connector portions 46 are switched on / off as the linear member 44 is removed from the human body, more specifically, the enable switch 35 inevitably switched from the on state to the off state. It functions as a (switch part).

  In addition, it is preferable to use what can electromagnetically shield an internal conductor from the exterior, such as a coaxial cable, as the said conductor part 47. FIG. This is to prevent the conductor portion 47 from functioning as a human body communication electrode. Various conductors can be used as the conductor portion 48, but it is also preferable to use a conductor that can electromagnetically shield the inner conductor from the outside, such as a coaxial cable, in order to prevent noise from entering from the outside.

  FIG. 5 is a block diagram showing an electrical configuration of the human body communication terminal device 20. The human body communication terminal device 20 is configured to perform authentication processing by performing human body communication with the authentication lock device 50, and includes two human body communication electrodes 22A and 22B, a communication circuit unit 24, and an authentication circuit. A control unit 30 and an authentication state switching unit 32 are included.

  Human body communication electrodes 22A and 22B are configured to be disposed at different locations in the human body. Here, as described above, one of the human body communication electrodes 22A is disposed at an intermediate portion of the linear member 44, and is disposed at the back of the neck. The other human body communication electrode 22B is provided in the human body communication terminal device main body 21 and is arranged in front of the human body, here, in front of the chest.

  The communication circuit unit 24 is configured to be able to transmit and receive signals that can be transmitted using the human body as a communication path through the body communication electrodes 22A and 22B.

  More specifically, the communication circuit unit 24 includes two resonance circuits 25 connected to the respective body communication electrodes 22A and 22B, and a detection circuit 26 connected to each of the resonance circuits 25. ing. Then, the signals received by the respective body communication electrodes 22A and 22B are inputted to the respective resonance circuits 25, and the signals of the predetermined frequency components of the carrier wave used for human body communication are taken out by the respective resonance circuits 25, respectively. The detection circuit 26 can be input. When a signal having a predetermined frequency component is input to each detection circuit 26, each detection circuit 26 receives a detection signal corresponding to the presence / absence of reception at each corresponding body communication electrode 22A, 22B as a reception status signal. Output as. Here, according to the presence or absence of reception at each of the body communication electrodes 22A and 22B, a high level signal is output from the corresponding detection circuit 26 when there is reception, and when there is no reception, the corresponding detection circuit 26 outputs a low level signal.

  The detection circuit 26 is connected to a power supply line La that is directly fed from the battery 31, and always operates regardless of whether the authentication control unit 30 described later is activated.

  The communication circuit unit 24 includes a transmission circuit 27 and a reception circuit 28.

  The transmission circuit 27 includes a modulation circuit, an amplification circuit, and the like. The transmission circuit 27 is connected to the human body communication electrode 22B via one resonance circuit 25 and to the authentication control unit 30. The signal supplied from the authentication control unit 30 is modulated, amplified, and the like, and the processed signal is output to one human body communication electrode 22B via the resonance circuit 25.

  The receiving circuit unit 28 includes a demodulating circuit, an amplifying circuit, and the like. The receiving circuit unit 28 is connected to the human body communication electrode 22B via one resonance circuit 25 and to the authentication control unit 30. Yes. When a signal received through one of the human body communication electrodes 22B is input to the receiving circuit 28 via the resonance circuit 25, this signal is demodulated, amplified, etc., and given to the authentication control unit 30. .

  Note that a clock signal for synchronization is input to the transmission circuit 27 and the authentication control unit 30 described later. The transmission circuit 27 and the reception circuit 28 are connected to a power supply line Lb between a power supply control circuit 34 and an authentication control unit 30 described later, and are supplied with power in synchronization with the power supply timing to the authentication control unit 30. It becomes possible to operate.

  The authentication control unit 30 is configured by a general microcomputer including a CPU, a ROM, a RAM, and the like, and performs an arithmetic operation using a software program stored in advance to execute processing described later. The authentication control unit 30 has a storage unit 30a composed of a rewritable nonvolatile memory such as a flash memory or a non-rewritable memory, and a personal identification ID or the like is stored in advance in the storage unit 30a. ing.

  The authentication control unit 30 performs human body communication via one human body communication electrode 22B and executes a predetermined authentication process. FIG. 6 is a flowchart showing an example of the authentication operation by the authentication control unit 30. That is, the authentication control unit 30 is activated by supplying power and executes authentication processing. In step S1 after activation, human body communication is performed with the authentication lock device 50, which is an external device, and it is determined whether a signal from the authentication lock device 50 includes a request for reading the personal identification ID. Here, if it is determined that the read request is not included, the process of step S1 is repeated. If another command that is not a read request is given from an external device, processing according to the command may be performed.

  If it is determined in step S1 that a read request is included, the process proceeds to step S2. In step S2, the personal identification ID is read from the storage unit 30a and transmitted to the outside through human body communication, and the process ends. Thereby, the authentication lock apparatus 50 can acquire personal identification ID of the human body communication terminal device 20 which performed human body communication.

  The authentication control unit 30 is configured to be switchable between an authenticable state in which the authentication process can be performed and an unauthenticated state in which the authentication process cannot be performed. Here, the authentication control unit 30 enters an unauthenticated state when the power supply is cut off, and starts and authenticates when the power supply is started.

  These human body communication electrodes 22A and 22B, the communication circuit unit 24, and the authentication control unit 30 constitute a human body communication authentication processing unit.

  The authentication state switching unit 32 can switch the authentication control unit 30 from the unauthenticated state to the authenticable state when a signal is received through the two human body communication electrodes 22A and 22B based on the output from the communication circuit unit 24. It is configured.

  Here, the authentication state switching unit 32 includes an AND circuit 33 and a power supply control circuit 34.

  The AND circuit 33 is connected to the two detection circuits 26 and also connected to the power supply control circuit 34 via the enable switch 35. When the output signal from the detection circuit 26 is input to the AND circuit 33, the logical product of the two input signals is output as a signal. That is, when a signal is received by both human body communication electrodes 22A and 22B, a high level signal is output as a power-on signal, and when no signal is received by either or both of human body communication electrodes 22A and 22B A low level signal is output.

  The power supply control circuit 34 is inserted in the middle of the power supply line L between the battery 31 which is a power supply in the human body communication terminal device 20 and the power supply terminal of the authentication control unit 30. And the power supply control circuit 34 switches the presence or absence of the power supply with respect to the authentication control part 30 by turning on and off the said power supply line.

  Switching control of the power supply line from OFF to ON in the power supply control circuit 34 is performed based on a signal output from the AND circuit 33. That is, when a high level signal is output from the AND circuit 33 as a power-on signal, the power line L is switched on and power supply to the authentication control unit 30 is started. As a result, the power supply control circuit 34 activates the authentication control unit 30 to switch from the unauthenticated state to the authenticable state.

  The power supply line L may be switched from on to off at the timing after the authentication processing by the authentication control unit 30 is completed. For example, the timing when the signal output from the AND circuit 33 is changed to the low level (that is, The timing at which a signal from the authentication lock device 50 is no longer transmitted), the timing at which a predetermined time required for the authentication processing after the start of power supply to the authentication control unit 30 has elapsed, and the fact that the authentication processing has ended from the authentication control unit 30 It may be performed at the timing when the command is given.

  An enable switch 35 is inserted between the AND circuit 33 and the power supply control circuit 34, and is turned on when the pair of connector portions 46 are connected as described above. It is turned off when released. That is, the output from the AND circuit 33 can be input to the power supply control circuit 34 with the pair of connector portions 46 being connected to the connector, and the power supply control circuit 34 is turned on from the off state when the connector connection is released. It does not switch to the state.

  Thereby, depending on the on / off state of the enable switch 35, the power supply to the authentication control unit 30 is enabled or disabled, and the human body communication electrodes 22A and 22B, the communication circuit unit 24, and the authentication control unit 30 are configured. The human body communication authentication processing unit is switched between an authenticable state (a state where power is supplied to the authentication control unit 30 and activated) and an unauthenticated state (a state where the power supply to the authentication control unit 30 is cut off). It is like that.

<3. Authentication lock device>
FIG. 7 is a block diagram showing an electrical configuration of the authentication lock device 50. The authentication lock device 50 includes an authentication lock control unit 52, a transmission circuit 54 and a reception circuit 55, a resonance circuit 56, a human body communication electrode 58, a driver circuit 60, and an actuator 62.

  The human body communication electrode 58 is a conductive member provided on the object to be locked. Here, the handle portion 12a of the door 12 of the cabinet 10 is formed of a conductive material such as metal and is used as the electrode 58 for human body communication.

  The transmission circuit 54 includes a modulation circuit, an amplification circuit, and the like, and is connected to the authentication lock control unit 52 and to the human body communication electrode 58 via the resonance circuit 56. Then, the signal supplied from the authentication lock control unit 52 is modulated, amplified, etc., and the processed signal is output to the human body communication electrode 58 via the resonance circuit 56.

  The reception circuit 55 includes a demodulation circuit, an amplification circuit, and the like, and is connected to the human body communication electrode 58 via the resonance circuit 56 and is also connected to the authentication lock control unit 52. When a signal received through the human body communication electrode 58 is input to the receiving circuit 55 via the resonance circuit 56, this signal is demodulated, amplified, etc., and given to the authentication lock control unit 52.

  The transmission circuit 54 and the authentication lock control unit 52 are input with a clock signal for synchronization.

  The authentication lock control unit 52 is configured by a general microcomputer including a CPU, a ROM, a RAM, and the like, and performs an arithmetic operation using a software program stored in advance to execute processing described later. The authentication lock control unit 52 has a storage unit 52a composed of a rewritable non-volatile memory such as a flash memory or a non-rewritable memory, and the personal identification ID and the use are stored in the storage unit 52a in advance. Authentication information in which the presence / absence of authority is associated is stored.

  The authentication lock control unit 52 performs human body communication with the human body communication terminal device 20 through the transmission circuit 54, the reception circuit 55, the resonance circuit 56, and the human body communication electrode 58, and executes a process authentication process. . The authentication lock control unit 52 controls the operation of the actuator 62 via the driver circuit 60. The actuator 62 is constituted by a motor, an electromagnetic planer, or the like, and operates a lock mechanism for locking or unlocking the door 12 in response to the operation of the actuator 62 to lock the door 12 in a locked state. Switch to the unlocked state. Such a locking mechanism can be realized by various configurations including well-known techniques applied to various electronic locking devices, and therefore description thereof is omitted here.

  FIG. 8 is a flowchart showing the operation of the authentication lock control unit 52. In the initial state, the lock mechanism is maintained in the locked state, and the following processing is started when it is detected that the human body has come into contact with the handle portion 12a which is the human body communication electrode 58. Note that the contact between the human body and the human body communication electrode 58 can be detected based on, for example, a principle using a change in capacitance between the human body and the human body communication electrode 58. However, the activation signal may be transmitted intermittently in step S11 described later without detecting contact between the human body and the human body communication electrode 58.

  First, after starting the processing, in step S11, the authentication lock control unit 52 transmits an activation signal through the human body communication electrode 58. Here, when the activation signal is received by the human body communication terminal device 20 and the human body communication terminal device 20 is activated, the personal identification ID is transmitted from the human body communication terminal device 20.

  In the next step S12, it is determined whether or not a personal identification ID has been received via human body communication. If it is determined that there is no reception, the process is terminated and the lock state is maintained. On the other hand, if it is determined that there is reception, the process proceeds to the next step S13.

  In step S13, it is determined whether or not the authentication is successful based on the received personal identification ID and the authentication information stored in the storage unit 52a. In the case of failure, that is, when no use is associated with the received personal identification ID, the process is terminated and the locked state is maintained. On the other hand, if the authentication is successful, that is, if the received personal identification ID is associated with use, the process proceeds to the next step S14.

  In step S <b> 14, the authentication lock control unit 52 causes the actuator 62 to perform the unlocking operation via the driver circuit 60. As a result, the door 12 is unlocked, and the user can use the door 12 by opening the door 12.

<4. Overall operation>
The overall operation of the authentication system configured as described above will be described focusing on the operation up to the start of communication for authentication. FIG. 9 is a diagram for explaining a main part of the overall operation of the authentication system.

  First, in the initial state, the door 12 is in a locked state. In this state, when the human body touches (contacts) the handle portion 12a as the human body communication electrode 58 as in step S21, as shown in step S22, the authentication lock device 50 is directed toward the human body communication terminal device 20, An activation signal is transmitted by human body communication.

  Then, as shown in steps S23 to S25, when there is reception in both the human body communication electrodes 22A and 22B and the connector unit 46 is connected to the connector, the authentication control unit 30 proceeds to step S26. to start. In the next step S27, human body communication for authentication is started, and the above authentication is performed.

  On the other hand, if any of the conditions of steps S23 to S25 is not satisfied, the authentication control unit 30 is not activated, and therefore the process is not performed and the door 12 is maintained in the locked state. That is, when the human body communication terminal device 20 is removed from the human body, the connector connection is removed, and the power supply to the authentication control unit 30 is kept cut off, so that the authentication processing is not performed. Is done.

  Further, even when power supply is disclosed to the authentication control unit 30 and the authentication control unit 30 is activated, when the human body communication terminal device 20 is removed from the human body, the pair of connector units 46 are turned off. The power supply to the authentication control unit 30 is cut off and the authentication is disabled.

  Note that steps S23 to S25 in FIG. 7 list conditions for starting the authentication control unit 30 for convenience of explanation, and do not necessarily indicate a specific processing order.

  FIG. 10 is a diagram illustrating a state in which a user who owns the human body communication terminal device 20 is in contact with the human body communication electrode 58.

  As shown in the figure, when the user P1 who owns the human body communication terminal device 20 contacts the human body communication electrode 58, both human body communication electrodes 22A and 22B of the human body communication terminal device 20 and the human body of the authentication lock device 50 are used. A communication path is formed between the communication electrode 58 and the floor or the ground as a ground and the human torso or arm as a signal transmission path. As a result, human body communication is performed between the two human body communication electrodes 22A and 22B and the human body communication electrode 58, and authentication as described above is performed.

  FIG. 11 shows a state in which another person P2 is interposed between the person P1 carrying the human body communication terminal device 20 and the human body communication electrode 58, and the other person P2 is in contact with the human body communication electrode 58. FIG.

  In this case, when the person P1 and the person P2 are close to each other, a relatively large stray capacitance is formed between the two persons P1 and P2, and between the human body communication electrode 22B and the human body communication electrode 58, There is a possibility that a signal transmission path that travels through both the persons P1, P2 and the space between them is formed. However, even in this case, the other human body communication electrode 22A is farther away from the human body communication electrode 58 than the one human body communication electrode 22A, and the human body portion of the person P1 is interposed. For this reason, it can be said that the possibility that a signal transmission path is formed between the human body communication electrode 22A and the human body communication electrode 58 is low. When the direction of the person P1 is reversed, the above is reversed. Thus, it can be said that the human body communication electrodes 22A and 22B installed in different parts of the human body are unlikely to establish human body communication with the human body communication electrode 58 via the other person P2.

  According to the human body communication terminal device 20 configured as described above, the mounting member 40 is provided with a pair of connector portions 46 (enable switches 35) that are switched on and off as the mounting member 40 is removed from the human body. In response to the change in the on / off state of the pair of connector portions 46 (enable switch 35) as the mounting member 40 is removed from the human body, the authentication control unit 30 is in an unauthenticated state (a state where the power supply is cut off) ) Can be switched to. Therefore, as the mounting member 40 is removed from the human body, the authentication control unit 30 can be made in an unauthenticated state. For this reason, for example, a person who does not have the human body communication terminal device 20 in the state where the human body communication terminal device 20 that is not attached to the human body is stored on a metal desk, storage, etc., is close to the desk, storage, etc. Even if the authentication device is touched at the position, the human body communication terminal device 20 itself is maintained without being activated. For this reason, it can suppress more reliably that the human body communication terminal device 20 which is not mounted | worn with a human body performs wrong authentication operation | movement. The authentication control unit 30 is in an unauthenticated state (power supply is cut off) in response to a change in the on / off state of the pair of connector units 46 (enable switch 35) as the mounting member 40 is removed from the human body. The state that can be switched to (status) may be switched to an actually unauthenticated state depending on other conditions, such as the reception status at both electrodes 22A and 22B in the present embodiment. It means that.

  In addition, in a state where the connector unit 46 (enable switch 35) is turned on, power is supplied to the authentication control unit 30 to enable authentication, and in a state where the connector unit 46 (enable switch 35) is turned off. Since the power supply to the authentication control unit 30 is cut off and the authentication is disabled, power consumption in the authentication disabled state can be suppressed.

  In addition, a pair of connector portions 46 are provided in the middle of the linear member 44 that can be disposed around the neck through the head periphery, and the pair of connector portions 46 are connected to each other by the connector connection. An annular portion R which can be set and can pass through the circumference of the head is formed. For this reason, by connecting the pair of connector portions 46 with the linear member 44 disposed around the neck, the authentication operation can be performed. On the other hand, when the human body communication terminal device 20 is removed from the human body, it is necessary to disconnect the connector connection of the pair of connector portions 46, so that it is possible to switch to the unauthenticated state without forgetting it in the state of being removed from the human body.

{Modifications}
In the present embodiment, when reception is performed by the two human body communication electrodes 22A and 22B, the configuration can be switched from the unauthenticated state to the authenticable state. However, such a configuration may be omitted.

  For example, one electrode 22A and the corresponding component are omitted, and a signal to turn on the power supply control unit 34 is input by switching the pair of connector units 46 (enable switch 35) to the on state. You may be made to do.

  Further, as in the modification shown in FIG. 12, a pair of connector portions 146 having the same configuration as the pair of connector portions 46 are provided in the middle of the power supply line L that supplies power from the battery 31 to the authentication control unit 30. The power supply to the authentication control unit 30 may be performed by the connector connection between the two connector units 146, and the power supply to the authentication control unit 30 may be cut off by disconnecting the connector connection between the two connector units 146. .

  In addition, a signal corresponding to the on / off state of both the connector units 46 and 146 is given as a sleep signal or a pause signal to the authentication control unit 30 or the like, so that the authentication control unit 30 or the like is in a sleep state from an authenticable state (enable state). Or you may make it switch to authentication impossible states (disabled state), such as a dormant state. Here, the sleep state or the hibernation state is a state in which power consumption is suppressed by disabling at least a part of functions as compared with a normal state (authenticable state) in which the authentication process is executed. It means an unauthenticated state where the operation is not started even if a signal is received by the electrode 22B or the like.

  In addition, a signal corresponding to the on / off state of both the connector portions 46 and 146 is given as an authentication processing start command or an authentication stop command to the authentication control unit 30 or the like, and the authentication processing unit 30 or the like performs the authentication processing according to the command. The processing may be performed by switching between an authenticable state and an unauthenticable state.

  Further, as the switch portion that is switched on and off as the mounting member 40 is removed from the human body, it is not always necessary to adopt the configuration of the connector portions 46 and 146.

  For example, the linear member 44 is provided with two members that can be combined and separated by fitting, pinching, screwing, or the like, and one member is pushed in by the combination of both members to be turned on or off, A switch or the like that is turned off or turned on when the pushing operation force is released by separation may be incorporated.

  In addition, when the signal corresponding to the on / off state of the switch unit is given to the authentication control unit 30 or the like as a sleep signal or a pause signal, an authentication process start command or an authentication stop command as described above, the switch unit is turned on / off. Since it is only necessary to be able to determine the state, the two members may be in the on state or the off state in either the combined state or the separated state.

  Further, as described above, the authentication control unit 30 is not only switched between an authenticable state and an unauthenticable state in accordance with the on / off state of the switch unit, but also the human body communication authentication process such as the human body communication electrode 22A and the communication circuit unit 24 A part that functions as a unit may be switched between inoperable and operable.

  That is, the switch portion includes all configurations that are switched on and off as the mounting member 40 is removed from the human body. Further, as the human body communication terminal device 20, the power supply to at least a part of the human body communication authentication processing unit for performing authentication by performing human body communication according to on / off of the switch unit is continued or interrupted, At least one human body communication authentication processing unit for performing authentication by performing human body communication according to a configuration that can be switched between an authenticable state and an unauthenticable state by interrupting the circuit, etc., and according to ON / OFF of the switch unit This includes all configurations that can be switched between an authenticable state and an unauthenticable state by giving a predetermined command to the unit.

  The mounting member 40 is not limited to the one having the linear member 44 that can be suspended from the neck as described above.

  For example, the mounting member may be configured as a waist belt-shaped configuration that is mounted on the waist of a human body or a wristband that is mounted on the wrist of the human body. In this case, the switch unit may be incorporated in a buckle portion or the like that is operated when removing from the human body.

  In addition, the human body communication terminal device 20 is not limited to the example described in the above embodiment, and can be applied to all authentication systems that determine whether or not the user is a specific person.

It is explanatory drawing which shows the whole structure of an authentication system. It is a figure which shows the whole structure of the human body communication terminal device in the state which connected the connector part. It is a figure which shows a connector part. It is a figure which shows the whole structure of the human body communication terminal device in the state which removed the connection of the connector part. It is a block diagram which shows the electric constitution of a human body communication terminal device. It is a flowchart which shows the example of authentication operation | movement by an authentication control part. It is a block diagram which shows the electric constitution of an authentication locking device. It is a flowchart which shows operation | movement of an authentication lock control part. It is a figure for demonstrating the principal part of the whole operation | movement of an authentication system. It is a figure which shows the state in which the user who has a human body communication terminal device contacted the electrode for human body communication. It is a figure which shows the state which the other person intervened between the person who has a human body communication terminal device, and the electrode for human body communication, and the said other person contacted the electrode for human body communication. It is a figure which shows a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Human body communication terminal device 22A, 22B Body communication electrode 24 Communication circuit part 30 Authentication control part 30a Memory | storage part 31 Battery 32 Authentication state switching part 34 Power supply control circuit 35 Enable switch 40 Mounting member 44 Linear member 46, 146 Connector part 48 Conductor 50 Authentication lock device 58 Human body communication electrode L Power line R Annular part

Claims (2)

A human body communication terminal device capable of performing authentication processing by performing human body communication with an authentication device,
Human body communication electrode, a communication circuit unit for transmitting and receiving signals that can be transmitted through the human body communication electrode through the human body communication electrode, and human body communication via the human body communication electrode and the communication circuit unit for authentication A human body communication authentication processing unit having an authentication control unit configured to execute processing;
A mounting member that can be detachably mounted on the human body;
A switch part that is provided on the mounting member and that is switched on and off as the mounting member is removed from the human body;
With
The human body communication authentication processing unit is configured to be able to switch to a non-authenticable state where authentication processing cannot be performed in accordance with a change in the on / off state of the switch unit that is switched as the mounting member is removed from the human body. And
An annular linear member that can be disposed around the neck through the head of the human body,
The switch unit has a pair of split switch units that can be combined and separated, and is configured to be able to be switched on and off according to their combined and separated state.
The pair of split switch portions are provided at intervals along the extending direction of the linear member, and the pair of split switch portions are combined so that a part of the linear member is arranged around the neck. A human body communication terminal device in which an annular portion that can be installed and cannot pass around the head is formed. The human body communication terminal device according to claim 1,
The switch unit is configured to be able to continue an on state in a state where the mounting member is mounted on the human body, and to be switched from an on state to an off state as the mounting member is removed from the human body. ,
With the switch unit turned on, power can be supplied to the human body communication authentication processing unit so that it can be switched to the authenticable state, and with the switch unit turned off, the human body communication authentication process The human body communication terminal device in which the power supply to at least a part of the unit is cut off and the authentication is disabled .

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