JP2009302714A - Electric field communication authentication system, and identification device and device to be identified used by the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric field communication authentication system capable of reducing power consumption in the electric field communication authentication system as a whole. <P>SOLUTION: The electric field communication authentication system includes an identification device and a device to be identified. The identification device transmits a wakeup signal for a fixed time by electric field communication on the basis of a switching operation, starts to receive and collate an ID signal after the switching operation, and outputs an authentication signal to the outside in accordance with the collation result. The device to be identified intermittently receives the wakeup signal by electric field communication and starts to transmit an ID signal by electric field communication, according to the reception of the wakeup signal. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electric field communication authentication system and an identification device and an identification target device used therefor, and particularly preferably used when both the authentication device and the authentication target device are battery-powered and a constant power source cannot be expected in the surroundings. The present invention relates to an electric field communication authentication system that can be used, and an identification device and an identification device used therefor.

  A general authentication system includes a device to be identified that replaces an electronic key and a recognition device that replaces an electronic key reader. For example, data communication includes an electrical locker system for a locker, a data communication receiving device, and a transmitting device. Used in systems. Among these authentication systems, an electric field communication authentication system uses electric field communication for communication between a device to be identified and a recognition device.

  In the conventional electric field communication authentication system, when the recognition device is driven by a battery, a switch on the transmitter side is disposed on an electrode for electrolytic communication that acts as an intermediary for electric field communication in order to reduce useless power consumption of the recognition device, The recognition device is activated by pressing or touching an electrode to save power in the recognition device (see Patent Document 1).

JP 2007-22214 A

  However, in the conventional electric field authentication system, power saving measures for the device to be authenticated are not taken, and if the power supply of the device to be authenticated is not artificially turned on / off, the useless power consumption of the device to be authenticated is reduced. It was difficult.

  Therefore, the present invention has been made in view of these points, and provides an electric field communication authentication system capable of reducing power consumption as an entire electric field communication authentication system, and an identification device and an identification target device used therefor. It is an object of the present invention.

  In order to achieve the above-described object, the electric field communication authentication system of the present invention, as a first aspect thereof, transmits a wake-up signal by electric field communication based on a switching operation for a certain period of time, and receives an ID signal after the switching operation and An identification device that starts collation and outputs an authentication signal externally according to the collation result, and intermittently receives the wakeup signal by electric field communication, and starts transmission of an ID signal by electric field communication in response to reception of the wakeup signal And a device to be identified.

  According to the electric field communication authentication system of the first aspect of the present invention, the identification device is activated based on the switching operation, and the identified device receives the wake-up signal for other operations except for the intermittent reception of the wake-up signal. Therefore, the power consumption can be reduced for both the identification device and the identification target device.

  The electric field communication authentication system according to the second aspect of the present invention includes a first electrode plate that mediates electric field communication, and mechanically, electrically, or softwarely by pressing or contacting the first electrode plate with an electric field communication medium. A switching element that performs a switching operation, a first electric field communication circuit that starts transmission of a wake-up signal and reception of an ID signal via the first electrode plate after the switching operation, and a first that stores ID signal verification information 1 memory circuit and control for causing the first electric field communication circuit to transmit the wake-up signal for a certain period of time and to receive the ID signal for a certain period of time based on the switching operation of the switch element, the first electric field communication circuit received First control for comparing the ID signal with the verification information stored in the first memory circuit and externally outputting an authentication signal according to the verification result of the ID signal An identification device having a path; a second electrode plate serving as a medium for electric field communication; a second electric field communication circuit that performs intermittent reception of a wakeup signal and transmission of an ID signal via the second electrode plate; A second storage circuit for storing the ID signal, and a second control for instructing transmission of the ID signal stored in the second storage circuit in response to reception of the wake-up signal by the second electric field communication circuit And a device to be identified having a circuit.

  According to the electric field communication authentication system of the second aspect of the present invention, the identification device is activated based on the switching operation, and the identified device receives the wakeup signal for other operations except for the intermittent reception of the wakeup signal. Therefore, the power consumption can be reduced for both the identification device and the identification target device.

  An identification apparatus for an electric field communication authentication system according to a third aspect of the present invention includes: a first electrode plate serving as an intermediary for electric field communication; and mechanical, electrical, or A switching element that performs a switching operation in software, a first electric field communication circuit that starts transmission of a wakeup signal and reception of an ID signal via the first electrode plate after the switching operation, and ID signal verification information A first memory circuit for storing, and a control for causing the first electric field communication circuit to transmit the wakeup signal for a certain period of time and to receive the ID signal for a certain period of time based on the switching operation of the switch element; Compares the received ID signal with the verification information stored in the first storage circuit, and externally outputs an authentication signal according to the verification result of the ID signal It is characterized in that it comprises a first control circuit.

  According to the identification device of the electric field communication authentication system of the third aspect of the present invention, since the identification device is activated based on the switching operation, power consumption can be reduced.

  The identified device of the electric field communication authentication system according to the fourth aspect of the present invention includes a second electrode plate that serves as an intermediary for electric field communication, a second storage circuit that stores an ID signal, and a second electrode plate. A second electric field communication circuit for intermittently receiving a wakeup signal transmitted from the outside and transmitting an ID signal, and stored in the second memory circuit in response to reception of the wakeup signal by the second electric field communication circuit. And a second control circuit for performing control for instructing transmission of the ID signal.

  According to the identified device of the electric field communication authentication system of the fourth aspect of the present invention, the identifying device is activated based on the switching operation, and the identified device wakes up for other operations except for intermittent reception of the wakeup signal. Since the activation is performed based on the reception of the signal, it is possible to reduce the power consumption of both the identification device and the identified device.

  In the electric field communication authentication system according to the fifth aspect of the present invention, the first wake-up signal is fixed by electric field communication based on reception of the second wake-up signal while intermittently receiving the second wake-up signal by electric field communication. An identification device that starts receiving and collating the ID signal after receiving the second wake-up signal and outputs an authentication signal externally according to the collation result, and transmitting the second wake-up signal by electric field communication. The apparatus includes a device to be identified that performs intermittent transmission and intermittent reception of the first wakeup signal and transmits an ID signal by electric field communication in response to reception of the first wakeup signal.

  According to the electric field communication authentication system of the fifth aspect of the present invention, the identification device starts up based on the reception of the second wakeup signal for other operations except for the intermittent reception of the second wakeup signal. Since the identification device is activated based on reception of the first wakeup signal for other operations except for intermittent transmission of the second wakeup signal and intermittent reception of the first wakeup signal, the identification device and the identified device In either case, power consumption can be reduced. Since both wake-up signals are transmitted and received intermittently, power consumption can be reduced.

  The electric field communication authentication system according to the sixth aspect of the present invention includes a first electrode plate serving as an intermediary for electric field communication, intermittent reception of a second wakeup signal, and first reception after reception of the second wakeup signal. A first electric field communication circuit for transmitting a wake-up signal and receiving an ID signal through a first electrode plate; a first storage circuit for storing ID signal verification information; and a second wake-up signal Control for causing the first electric field communication circuit to transmit the first wake-up signal for a certain period of time and receiving the ID signal for a certain period of time based on the reception, the ID signal received by the first electric field communication circuit and the first memory An identification device having a first control circuit that compares the verification information stored in the circuit and outputs an authentication signal according to the verification result of the ID signal, and a second electrode plate that serves as a medium for electric field communication When, A second electric field communication circuit that performs intermittent transmission of the second wakeup signal, intermittent reception of the first wakeup signal, and transmission of the ID signal after reception of the first wakeup signal through the second electrode plate; The second memory circuit for storing the ID signal and the control for instructing the transmission of the ID signal stored in the second memory circuit in response to the reception of the first wakeup signal by the second electric field communication circuit And a device to be identified having a second control circuit.

  According to the electric field communication authentication system of the sixth aspect of the present invention, the identification device starts up based on the reception of the second wakeup signal for other operations except for the intermittent reception of the second wakeup signal. Since the identification device is activated based on reception of the first wakeup signal for other operations except for intermittent transmission of the second wakeup signal and intermittent reception of the first wakeup signal, the identification device and the identified device In either case, power consumption can be reduced. Since both wake-up signals are transmitted and received intermittently, power consumption can be reduced.

  The electric field communication authentication system according to a seventh aspect of the present invention is the electric field communication authentication system according to the sixth aspect, wherein the transmission cycle of the second wakeup signal is equal to or more than that of the transmission cycle of the ID signal. The transmission time of the second wakeup signal is shorter than the transmission time of the ID signal.

  According to the electric field communication authentication system of the seventh aspect of the present invention, if the transmission cycle of the second wakeup signal is equal to or longer than the transmission cycle of the ID signal, the transmission time of the second wakeup signal is Since the pause time becomes longer as the time becomes shorter, the power consumption of the identified device can be reduced.

  An electric field communication authentication system according to an eighth aspect of the present invention is the electric field communication authentication system according to the seventh aspect, wherein the transmission wave of the second wakeup signal is a pulse wave (rectangular wave).

  According to the electric field communication authentication system of the eighth aspect of the present invention, the identification device only needs to monitor the strength (voltage) of the second wakeup signal, and therefore the reception circuit of the first electric field communication circuit of the identification device. It is possible to make a simple circuit that operates at low power in the sleep state.

  An identification apparatus for an electric field communication authentication system according to a ninth aspect of the present invention includes a first electrode plate serving as an intermediary for electric field communication, intermittent reception of a second wakeup signal, and reception of a second wakeup signal. A first electric field communication circuit for transmitting a first wake-up signal and receiving an ID signal via a first electrode plate; a first storage circuit for storing ID signal verification information; and a second wake Control for causing the first electric field communication circuit to transmit the first wakeup signal for a certain period of time and receiving the ID signal for a certain period of time based on the reception of the up signal, the ID signal received by the first electric field communication circuit and the first signal And a first control circuit that performs comparison with the collation information stored in one storage circuit and external output of an authentication signal in accordance with the collation result of the ID signal.

  According to the identification device of the electric field communication authentication system of the ninth aspect of the present invention, the identification device is activated based on reception of the second wakeup signal for other operations except for intermittent reception of the second wakeup signal. Therefore, the power consumption of the identification device can be reduced. In addition, since reception of the second wakeup signal is intermittently driven, power consumption can be reduced as compared with constant reception.

  The identified device of the electric field communication authentication system according to the tenth aspect of the present invention includes a second electrode plate that serves as a medium for electric field communication, a second storage circuit that stores an ID signal, and a second electrode plate. A second electric field communication circuit that performs intermittent transmission of the second wakeup signal, intermittent reception of the first wakeup signal, and transmission of the ID signal, and reception of the first wakeup signal by the second electric field communication circuit. And a second control circuit that performs control for instructing transmission of the ID signal stored in the second storage circuit.

  According to the identified apparatus of the electric field communication authentication system of the tenth aspect of the present invention, the identified apparatus performs other operations except for intermittent transmission of the second wakeup signal and intermittent reception of the first wakeup signal. Since it starts based on reception of a 1st wakeup signal, the power consumption of a to-be-identified apparatus can be reduced. Further, since both the transmission of the second wakeup signal and the reception of the first wakeup signal are intermittently driven, the power consumption can be reduced as compared with the constant transmission or the constant reception.

  The identified device of the electric field communication authentication system of the eleventh aspect of the present invention is the identified device of the electric field communication authentication system of the tenth aspect, wherein the transmission cycle of the second wakeup signal is the transmission cycle of the ID signal. The transmission time of the second wake-up signal is shorter than the transmission time of the ID signal.

  According to the identified apparatus of the electric field communication authentication system of the eleventh aspect of the present invention, if the transmission cycle of the second wakeup signal is equal to or longer than the transmission cycle of the ID signal, the second wakeup signal As the transmission time becomes shorter, the pause time becomes longer, so that the power consumption of the identified device can be reduced.

  The identified device of the electric field communication authentication system of the twelfth aspect of the present invention is the identified device of the electric field communication authentication system of the eleventh aspect, wherein the transmitted wave of the second wakeup signal is a pulse wave (rectangular wave). It is characterized by being.

  According to the identified device of the electric field communication authentication system of the twelfth aspect of the present invention, the receiving-side identification device only needs to monitor the strength (voltage) of the second wakeup signal. The receiving circuit of the electric field communication circuit can be a simple circuit that is driven at low power in the resting state.

  In each of the above-described embodiments, the circuit name, member name, or signal name assigned “first” relates to the identification device, and the circuit name, member assigned “second”. The name or signal name relates to the identified device. Therefore, it does not indicate the arrangement order or transmission / reception order of those circuits, members or signals.

  According to the electric field communication authentication system of the present invention and the identification device and the identification target device used therefor, the recognition device is activated based on the switching operation that does not require power or the intermittent transmission of the second wakeup signal that can reduce power consumption, Since the device to be identified is activated by receiving the first wakeup signal transmitted from the recognition device by intermittent reception, a state other than the communication state necessary for authentication in the recognition device and the device to be authenticated is in a dormant state. The electric field communication authentication system as a whole has the effect of reducing power consumption.

  Hereinafter, the electric field communication authentication system of the present invention will be described with reference to the two embodiments.

  First, the electric field communication authentication system 1A of the first embodiment will be described. FIG. 1 shows a communication state in the electric field communication authentication system 1A of the first embodiment. The electric field communication authentication system 1A of the first embodiment is formed assuming that it is used in a locking system, and includes an identification device 11A and a device to be identified 21A as shown in FIG.

  The identification device 11A of the first embodiment is, for example, a device corresponding to an electronic key reading device of a locking system, and is mounted on a locking device such as a locker. The identification device 11A electrically authenticates whether the locking mechanism of the locking device can be opened or closed.

  As shown on the left side of FIG. 1, the identification device 11A includes a first electrode plate 12A, a switch element 18A, a first electric field communication circuit 13A, and a first memory circuit inside or outside the first case 11Aa. 15A and a first control circuit 14A. Further, the identification device 11A includes a battery 16A serving as a drive source, and is connected to the first control circuit 14A.

  The first electrode plate 12A is formed in a plate shape using a metal having good conductivity such as Cu or Al. The first electrode plate 12A serves as a medium for electric field communication.

  The switch element 18A is formed by using the first electrode plate 12A as a switch surface, and has a mechanism for mechanically performing a switching operation by pressing the first electrode plate 12A.

  The first electric field communication circuit 13A is a circuit that transmits a wakeup signal and receives an ID signal in the normal mode of the identification device 11A, and is electrically connected to the first electrode plate 12A. Here, the wake-up signal is an activation signal for changing the identified device 21A from the sleep mode to the normal mode, and the ID signal is a key signal for identifying the identified device 21A by the identifying device 11A. Further, the identification device 11A has a sleep mode in addition to the normal mode, and switches any mode by the switching operation of the switch element 18A. In the sleep mode in the identification device 11A, only the circuit that detects the switching operation of the switch element 18A in the first control circuit 14A is activated, the other circuits in the first control circuit 14A, and the first electric field communication. This is a state where the circuit 13A and the first memory circuit 15A are at rest. In contrast, the normal mode refers to a state in which all circuits in the identification device 11A are activated.

  The first storage circuit 15A is a so-called memory, and stores ID signal verification information.

  The first control circuit 14A is a processing device such as a central processing unit, and is connected to the switch element 18A, the first electric field communication circuit 13A, and the first storage circuit 15A. The first control circuit 14A is formed to perform a predetermined operation based on the switching operation of the switch element 18A. There are mainly three predetermined operations in relation to the characteristic parts of the first embodiment. The first operation is control of an instruction to transmit the wake-up signal for a certain time such as 10 seconds to the first electric field communication circuit 13A and an instruction to receive the ID signal for a certain time. The second operation is a comparison between the ID signal received by the first electric field communication circuit 13A and the collation information stored in the first storage circuit 15A. Then, in the third operation, the authentication signal is externally output via the output terminal 17A in accordance with the collation result of the ID signal. The authentication signal is an unlocking permission signal in the locking system and is a signal indicating that the verification result is good. That is, when a locking mechanism (not shown) receives the above-described authentication signal, the locking mechanism is unlocked.

  On the other hand, the identified device 21A is, for example, a device instead of an electronic key, and can be directly touched by a hand or placed in a shirt or trouser pocket (a position close to several centimeters from the electric field communication medium) and the recognition device and electric field communication. It is for performing. As shown in the right side of FIG. 1, the recognized device includes a second electrode plate 22A, a second electric field communication circuit 23A, a second storage circuit 25A, and a second storage circuit inside or outside the second case 21Aa. Two control circuits 24A are provided. Further, the identified device 21A includes a battery 26A serving as a drive source, and is connected to the second control circuit 24A.

  The second electrode plate 22A is the same as the first electrode plate 12A.

  The second electric field communication circuit 23A is a circuit that performs intermittent reception of a wakeup signal and transmission of an ID signal via the second electrode plate 22A, and is electrically connected to the second electrode plate 22A. Here, the identified device 21A has a normal mode and a sleep mode, and is configured to switch from the sleep mode to the normal mode in response to reception of the wake-up signal. The sleep mode in the identified device 21A means that only the circuits related to the intermittent reception of the wake-up signal in the second electric field communication circuit 23A and the second control circuit 24A are activated, and the second electric field communication circuit 23A and It means a state in which the other circuits of the second control circuit 24A and the second memory circuit 25A are at rest. On the other hand, the normal mode refers to a state in which all circuits in the identified device 21A are activated.

  The second storage circuit 25A is a so-called memory and stores an ID signal.

  The second control circuit 24A is a processing device such as a central processing unit, and is connected to the second electric field communication circuit 23A and the second storage circuit 25A, respectively. In response to reception of the wake-up signal by the second electric field communication circuit 23A, the second control circuit 24A transmits the ID signal stored in the second storage circuit 25A for a certain period of time. It is formed so as to perform control for instructing.

  Next, the operation of the electric field communication authentication system 1A of the first embodiment will be described.

  FIG. 2 shows an authentication operation flow in the electric field communication authentication system 1A of the first embodiment. First, an authentication operation flow of the identification device 11A is shown. As shown on the left side of FIG. 2, at the start (1SS), the identification device 11A is in the sleep mode (1S1). In this sleep mode, the circuits other than the switching operation detection circuit in the first control circuit 14A are inactive. Here, for example, when a finger of a human body serving as an electric field communication medium comes into contact with the first electrode plate 12A and the switching element 18A is switched via the first electrode plate 12A (1S2), the first control circuit 14A is When the switching operation is detected, the identification device 11A is switched from the sleep mode to the normal mode and is activated (1S3). When the mode is switched to the normal mode, the first control circuit 14A instructs the first electric field communication circuit 13A to transmit a wakeup signal for a certain period of time (part of the first operation). Based on the instruction, the circuit 13A transmits a wake-up signal for a predetermined time using electric field communication (1S4).

  On the other hand, as shown on the right side of FIG. 2, the identified device 21A is also in the sleep mode at the start (2SS) (2S1). In this sleep mode, the second electric field communication circuit 23A is in the intermittent reception state of the wakeup signal, and is related to the intermittent reception of the wakeup signal in the second electric field communication circuit 23A and the second control circuit 24A. Circuits other than the circuit are paused. Here, as described above, since the first electric field communication circuit 13A of the identification device 11A transmits the wake-up signal for a certain time (1S4), the second electric field communication circuit 23A of the identified device 21A is an electric field communication medium. The wake-up signal is received through the human body and the second electrode plate 22A (2S2).

  When the second electric field communication circuit 23A of the identified device 21A receives the wakeup signal (2S2), the second control circuit 24A detects the reception of the wakeup signal, and the identified device 21A changes from the sleep mode to the normal mode. The switching is activated (2S3). When the mode is switched to the normal mode, the second control circuit 24A instructs the second electric field communication circuit 23A to transmit the ID signal for a predetermined time (2S4). After transmitting the ID signal for a predetermined time (2S5), the identified device 21A switches from the normal mode to the sleep mode (2S6), and the authentication operation flow in the identified device 21A is completed (2SF).

  On the other hand, the first control circuit 14A of the identification device 11A starts an instruction to receive the ID signal for a certain period of time simultaneously with the transmission instruction of the wakeup signal (1S4) to the first electric field communication circuit 13A ( 1S5). Here, since the ID signal is transmitted from the second electric field communication circuit 23A of the identified device 21A (2S4), when the first electric field communication circuit 13A receives the ID signal (1S5), the first control circuit 14A compares the ID signal received by the first electric field communication circuit 13A with the verification information stored in the first storage circuit 15A, and starts the verification operation (1S6). When the ID signal is authenticated, the first control circuit 14A outputs the authentication signal externally via the output terminal 17A (1S7), and the identification device 11A switches from the normal mode to the sleep mode (1S8). On the other hand, if the first electric field communication circuit 13A cannot receive the ID signal (1S5) or the ID signal and the verification information do not match (1S6) due to a failure in electric field communication, etc., the reception time of the ID signal If the fixed time has not elapsed (1S9), the ID signal is continuously received (1S5). If the fixed time has elapsed (1S9), the identification device 11A switches from the normal mode to the sleep mode (1S8). Thus, the authentication operation flow in the identification device 11A is completed (1SF).

  That is, the identification device 11A transmits a wake-up signal by electric field communication for a certain time based on the switching operation (1S1 to 1S4), and the identified device 21A intermittently receives the wake-up signal by electric field communication (2S1, 2S2). The identified device 21A starts transmission of the ID signal by electric field communication in response to the reception of the wake-up signal (2S2 to 2S4), and the identification device 11A starts receiving and checking the ID signal after the switching operation. An authentication signal is externally output according to the collation result (1S5 to 1S7). Therefore, when attention is paid to each activation time (at the start of the normal mode), the identification device 11A is activated based on the switching operation, and the identified device 21A performs the wakeup signal for other operations excluding the intermittent reception of the wakeup signal. It will be activated based on the reception. As a result, in both the identification device 11A and the identified device 21A, the circuits other than the circuit related to transmission / reception of the wakeup signal can be put in the sleep state, so that the power consumption of the identification device 11A and the identified device 21A is reduced. be able to.

  Next, an electric field communication authentication system 1B according to the second embodiment will be described. The difference from the first embodiment is mainly that the identification device 11B is activated (switched to the normal mode) by receiving the second wakeup signal without performing the switching operation.

  FIG. 3 shows a communication state in the electric field communication authentication system 1B of the second embodiment. Similarly to the first embodiment, the electric field communication authentication system 1B of the second embodiment is formed assuming that it is used in a locking system. As shown in FIG. 3, the identification device 11B and the identified device 21B.

  Similar to the first embodiment, the identification device 11B of the second embodiment corresponds to an electronic key reading device of the locking system, and is mounted on a locking device such as a locker. As shown on the left side of FIG. 3, the identification device 11B includes a first electrode plate 12B, a first electric field communication circuit 13B, a first memory circuit 15B, and a first control circuit 14B. The identification device 11B includes a battery 16B serving as a drive source, and is connected to the first control circuit 14B.

  The first electrode plate 12B is the same as in the first embodiment.

  The first electric field communication circuit 13B is connected to the first electrode plate 12B. The first electric field communication circuit 13B performs three operations related to transmission / reception via the first electrode plate 12B. The first operation is intermittent reception of the second wakeup signal. The reception state is made pulsed at regular intervals, and reception is suspended in other states. The second operation is transmission of the first wakeup signal after reception of the second wakeup signal. This transmission is preferably performed only for a fixed time. The third operation is reception of the ID signal after reception of the second wakeup signal. This reception is also preferably performed only for a certain time.

  Similar to the first embodiment, the first storage circuit 15B stores ID signal verification information.

  The first control circuit 14B is a processing device similar to that of the first embodiment, and is connected to the first electric field communication circuit 13B and the first storage circuit 15B. The first control circuit 14B is formed to control the following three operations. The first operation is such that when the first electric field communication circuit 13B receives the second wakeup signal, the first wakeup signal is transmitted to the first electric field communication circuit 13B for a certain period of time. Instruct. At the same time, the first electric field communication circuit 13B is instructed to receive the ID signal for a predetermined time. In the second operation, when the first electric field communication circuit 13B receives the ID signal, the comparison information stored in the first storage circuit 15B is compared with the ID signal. In the third operation, an authentication signal corresponding to the verification result of the ID signal is output from the external terminal.

  On the other hand, the identified device 21B includes a second electrode plate 22B, a second electric field communication circuit 23B, a second memory circuit 25B, and a second control circuit 24B, as shown on the right side of FIG. The identified device 21B includes a battery 26B serving as a drive source, and is connected to the second control circuit 24B.

  The second electrode plate 22B is the same as in the first embodiment.

  The second electric field communication circuit 23B is connected to the second electrode plate 22B, and performs the following three operations related to transmission and reception via the second electrode plate 22B. The first operation is intermittent transmission of the second wakeup signal. The transmission wave of the second wakeup signal is preferably a pulse wave (rectangular wave). The second operation is intermittent reception of the first wakeup signal. The third operation is transmission of an ID signal for a certain period of time after receiving the first wakeup signal.

  Note that the transmission cycle of the second wakeup signal is preferably longer than the transmission cycle of the ID signal. The transmission time of the second wakeup signal is preferably shorter than the transmission time of the ID signal.

  Similar to the first embodiment, the second memory circuit 25B stores an ID signal.

  The second control circuit 24B is a processing device similar to that of the first embodiment, and is connected to the second electric field communication circuit 23B and the second storage circuit 25B. The second control circuit 24B performs control to instruct transmission of the ID signal stored in the second storage circuit 25B when the second electric field communication circuit 23B receives the first wakeup signal. Is formed.

  Next, the operation of the electric field communication authentication system 1B of the second embodiment will be described.

  FIG. 4 shows an authentication operation flow in the electric field communication authentication system 1B of the second embodiment. Unlike the first embodiment, the authentication operation flow of the second embodiment starts with the operation of the identified device 21B.

  As shown on the right side of FIG. 4, the identified apparatus 21B is in the sleep mode at the start (4SS) (4S1). In this sleep mode, the second electric field communication circuit 23B is in the transmission state of the second wakeup signal (4S2), and the second electric field communication circuit 23B is in the intermittent reception state of the first wakeup signal. (4S3). In the identified device 21B, circuits other than the circuits related to the transmission of the second wakeup signal and the intermittent reception of the first wakeup signal in the second electric field communication circuit 23B and the second control circuit 24B. Is paused. Here, when the second electrode plate 22B of the identified device 21B is close to the human body serving as the electric field communication medium, and the first electrode plate 12B of the identification device 11B contacts the human body serving as the electric field communication medium, for example. The second wake-up signal is transmitted from the identified device 21B to the identifying device 11B using electric field communication.

  On the other hand, as shown on the left side of FIG. 4, the identification device 11B is also in the sleep mode at the start (3SS) (3S1). In this sleep mode, circuits other than the circuit related to reception of the second wakeup signal are inactive. Here, when the second wake-up signal is received via the first electrode plate 12B (3S2), the first control circuit 14B detects the reception of the second wake-up signal, and the identification device 11B is in the sleep mode. Is switched to the normal mode to enter the activated state (3S3). When the mode is switched to the normal mode, the first control circuit 14B instructs the first electric field communication circuit 13B to transmit the first wakeup signal for a certain period of time (part of the first operation). The electric field communication circuit 13B transmits a first wake-up signal for a predetermined time using electric field communication based on the instruction (3S4).

  From here on, it is almost the same as in the first embodiment. As shown on the right side of FIG. 4, when the second electric field communication circuit 23B of the identified device 21B receives the first wake-up signal via the second electrode plate 22B (4S3), the second control circuit 24B Upon receipt of the first wake-up signal, the identified device 21B switches from the sleep mode to the normal mode and enters an activated state (4S4). When the mode is switched to the normal mode, the second control circuit 24B instructs the second electric field communication circuit 23B to transmit the ID signal for a predetermined time (4S5). After transmitting the ID signal for a predetermined time (4S6), the identified device 21B switches from the normal mode to the sleep mode (4S7), and the authentication operation flow in the identified device 21B is completed (4SF).

  On the other hand, as shown on the left side of FIG. 4, the first control circuit 14B of the identification device 11B sends the ID signal to the first electric field communication circuit 13B simultaneously with the transmission instruction (3S4) of the first wakeup signal. Is started for a certain period of time (3S5). Here, since the ID signal is transmitted from the second electric field communication circuit 23B of the identified device 21B (4S5), when the first electric field communication circuit 13B receives the ID signal via the first electrode plate 12B. (3S5), the first control circuit 14B compares the ID signal received by the first electric field communication circuit 13B with the verification information stored in the first storage circuit 15B, and starts the verification operation (3S6). When the ID signal is authenticated (3S6), the first control circuit 14B outputs the authentication signal externally via the output terminal 17B (3S7), and the identification device 11B switches from the normal mode to the sleep mode (3S8). . On the other hand, when the first electric field communication circuit 13B cannot receive the ID signal (3S5) or the ID signal and the verification information do not match (3S6) due to a failure in electric field communication or the like, the reception time of the ID signal If the predetermined time has not elapsed (3S8), the ID signal is continuously received (3S5). If the predetermined time has elapsed (3S8), the identification device 11B switches from the normal mode to the sleep mode (3S9). From the above, the authentication operation flow in the identification device 11B is completed (3SF).

  In other words, the identified device 21B performs intermittent transmission of the second wakeup signal and intermittent reception of the first wakeup signal using electric field communication (4S1 to 4S3), and the identification device 11B receives the second wakeup signal. The first wake-up signal is transmitted by electric field communication for a predetermined time based on the reception of (3S1 to S4). Further, the identified device 21B starts transmission of the ID signal by electric field communication in response to the reception of the first wakeup signal (4S3 to 4S5), and the identification device 11B receives the ID signal after receiving the second wakeup signal. Reception and verification are started, and an authentication signal is externally output according to the verification result (3S5 to 3S7). Therefore, when attention is paid at the time of each activation (at the start of the normal mode), the identification device 11B is activated based on the reception of the second wakeup signal, and the identified device 21B transmits the second wakeup signal and the second wakeup signal. Other operations except for the intermittent reception of one wakeup signal are activated based on the reception of the first wakeup signal. As a result, in both the identification device 11B and the identified device 21B, circuits other than the circuits related to transmission / reception of the first wakeup signal and the second wakeup signal can be put in the sleep state. The power consumption of the identified device 21B can be reduced. In addition, since both wakeup signals are transmitted and received intermittently, power consumption can be reduced.

  In the second embodiment, the transmission wave of the second wakeup signal in the identified device 21B is set to a pulse wave (rectangular wave). If the transmission wave of the second wakeup signal is a pulse wave, there are only two types of transmission voltages of the second wakeup signal, this voltage or a low voltage, and therefore the identification device 11B determines the strength of the second wakeup signal. Only (voltage) needs to be monitored. Therefore, it can be a simple circuit that is driven with low power in the sleep state of the first electric field communication circuit 13B of the identification device 11B.

  Furthermore, in the identified device 21B, the transmission cycle of the second wakeup signal is set longer than the transmission cycle of the ID signal, and the transmission time of the second wakeup signal is set shorter than the transmission time of the ID signal. ing. If the transmission cycle of the second wakeup signal is longer than the transmission cycle of the ID signal, the pause time is increased by the amount that the transmission time of the second wakeup signal is shortened. Therefore, the power consumption of the identified device 21B can be reduced.

  That is, according to the electric field communication authentication system of the present embodiment and the identification device and the identification target device used therefor, the recognition device is based on the switching operation that does not require power or the intermittent transmission of the second wakeup signal that can reduce power consumption. Since the device to be identified is activated by receiving the first wake-up signal transmitted from the recognition device by intermittent reception, the state other than the communication state necessary for authentication in the recognition device and the device to be authenticated is suspended. As a result, the electric field communication authentication system as a whole has the effect of reducing power consumption.

  In addition, this invention is not limited to embodiment mentioned above etc., A various change is possible as needed.

  For example, the switch element according to the first embodiment may be a mechanism that performs a switching operation electrically or by software, not by pressing the first electrode plate.

  Further, when the transmission time of the second wakeup signal is shorter than the transmission time of the ID signal, power saving can be achieved if the transmission cycle of the second wakeup signal is at least equal to the transmission cycle of the ID signal. Can be planned. The reverse is also true, and if the transmission period of the second wakeup signal is long compared to the transmission period of the ID signal, if the transmission time of the second wakeup signal is at least equal to the transmission time of the ID signal, Power saving can be achieved.

Schematic which shows the electric field communication authentication system of 1st Embodiment The flowchart which shows the authentication operation | movement flow in the electric field communication authentication system of 1st Embodiment. Schematic which shows the electric field communication authentication system of 2nd Embodiment. The flowchart which shows the authentication operation | movement flow in the electric field communication authentication system of 2nd Embodiment.

Explanation of symbols

1A, 1B Electric field communication authentication system 11A, 11B Identification device 12A, 12B First electrode plate 13A, 13B First electric field communication circuit 14A, 14B First control circuit 15A, 15B First storage circuit 16A, 16B Battery 17A , 17B Output terminal 18A Switch element 21A, 21B Device to be identified 22A, 22B Second electrode plate 23A, 23B Second electric field communication circuit 24A, 24B Second control circuit 25A, 25B Second memory circuit 26A, 26B Battery

Claims (12)

An identification device that transmits a wake-up signal based on a switching operation by electric field communication for a certain period of time, starts reception and verification of an ID signal after the switching operation, and outputs an authentication signal according to the verification result;
An electric field communication authentication system comprising: a device to be identified that intermittently receives the wakeup signal by electric field communication and starts transmitting the ID signal by electric field communication in response to reception of the wakeup signal. . A first electrode plate serving as an intermediary for electric field communication; a switch element that performs a switching operation mechanically, electrically, or software by pressing or contacting the first electrode plate by an electric field communication medium; and after the switching operation A first electric field communication circuit that starts transmission of a wakeup signal and reception of an ID signal via the first electrode plate; a first storage circuit that stores verification information of the ID signal; and Control for causing the first electric field communication circuit to transmit the wake-up signal for a certain period of time and receiving the ID signal for a certain period of time based on a switching operation, the ID signal received by the first electric field communication circuit, and the A comparison is made with the verification information stored in the first storage circuit, and an authentication signal is externally output according to the verification result of the ID signal. An identification device and a control circuit,
A second electrode plate serving as a medium for electric field communication; a second electric field communication circuit for intermittently receiving the wake-up signal and transmitting the ID signal through the second electrode plate; and storing the ID signal And a second control for performing control to instruct transmission of the ID signal stored in the second storage circuit in response to reception of the wake-up signal by the second electric field communication circuit An electric field communication authentication system comprising: a device to be identified having a circuit. A first electrode plate serving as a medium for electric field communication;
A switch element that performs a switching operation mechanically, electrically, or software by pressing or contacting the first electrode plate with an electric field communication medium;
A first electric field communication circuit for starting transmission of a wake-up signal and reception of an ID signal via the first electrode plate after the switching operation;
A first storage circuit for storing verification information of the ID signal;
Control that causes the first electric field communication circuit to transmit the wakeup signal for a certain period of time and receive the ID signal for a certain period of time based on the switching operation of the switch element, the first electric field communication circuit received the And a first control circuit that compares an ID signal with the verification information stored in the first storage circuit, and externally outputs an authentication signal according to the verification result of the ID signal. Identification device for electric field communication authentication system. A second electrode plate serving as a medium for electric field communication;
A second memory circuit for storing the ID signal;
A second electric field communication circuit for intermittently receiving a wake-up signal transmitted from the outside through the second electrode plate and transmitting the ID signal;
A second control circuit that performs control to instruct transmission of the ID signal stored in the second storage circuit in response to reception of the wake-up signal by the second electric field communication circuit. The identified device of the electric field communication authentication system. While intermittently receiving the second wake-up signal by electric field communication, the first wake-up signal is transmitted by electric field communication for a predetermined time based on the reception of the second wake-up signal, and the second wake-up signal An identification device for starting reception and verification of an ID signal after reception and outputting an authentication signal according to the verification result; and
The second wakeup signal is intermittently transmitted by electric field communication and the first wakeup signal is intermittently received, and the ID signal is transmitted by electric field communication in response to the reception of the first wakeup signal. An electric field communication authentication system comprising an identification device. The first electrode plate serving as an intermediary for electric field communication, the intermittent reception of the second wakeup signal, the transmission of the first wakeup signal and the reception of the ID signal after the reception of the second wakeup signal A first electric field communication circuit which is performed via one electrode plate; a first storage circuit which stores collation information of the ID signal; and the first electric field communication based on reception of the second wake-up signal. Control that causes the circuit to transmit the first wakeup signal for a certain period of time and receive the ID signal for a certain period of time, and the ID signal received by the first electric field communication circuit and the first memory circuit A first control circuit that performs comparison with the verification information and external output of an authentication signal according to the verification result of the ID signal;
A second electrode plate serving as an intermediary for electric field communication; intermittent transmission of the second wakeup signal; intermittent reception of the first wakeup signal; and reception of the first wakeup signal. A second electric field communication circuit that performs transmission via the second electrode plate, a second storage circuit that stores the ID signal, and reception of the first wakeup signal by the second electric field communication circuit And a second control circuit that performs control for instructing transmission of the ID signal stored in the second storage circuit in response to the electric field communication authentication system. The transmission cycle of the second wakeup signal is equal to or longer than the transmission cycle of the ID signal,
The electric field communication authentication system according to claim 6, wherein a transmission time of the second wakeup signal is shorter than a transmission time of the ID signal. 8. The electric field communication authentication system according to claim 7, wherein the transmission wave of the second wakeup signal is a pulse wave (rectangular wave). A first electrode plate serving as a medium for electric field communication;
First electric field communication for intermittently receiving the second wakeup signal and transmitting the first wakeup signal and receiving the ID signal after receiving the second wakeup signal through the first electrode plate Circuit,
A first storage circuit for storing verification information of the ID signal;
Control for causing the first electric field communication circuit to transmit the first wake-up signal for a certain period of time and to receive the ID signal for a certain period of time based on the reception of the second wake-up signal, the first electric field A first control circuit that compares the ID signal received by the communication circuit with the verification information stored in the first storage circuit and outputs an authentication signal according to the verification result of the ID signal; An identification apparatus for an electric field communication authentication system, comprising: A second electrode plate serving as a medium for electric field communication;
A second memory circuit for storing the ID signal;
A second electric field communication circuit that performs intermittent transmission of the second wakeup signal through the second electrode plate, intermittent reception of the first wakeup signal transmitted from the outside, and transmission of the ID signal;
A second control circuit that performs control to instruct transmission of the ID signal stored in the second storage circuit in response to reception of the first wakeup signal by the second electric field communication circuit. A device to be identified of an electric field communication authentication system characterized by the above. The transmission cycle of the second wakeup signal is equal to or longer than the transmission cycle of the ID signal,
The identification target device of the electric field communication authentication system according to claim 10, wherein a transmission time of the second wakeup signal is shorter than a transmission time of the ID signal. 12. The identified device of the electric field communication authentication system according to claim 11, wherein the transmission wave of the second wakeup signal is a pulse wave (rectangular wave).

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