JP4413950B2 - Electric field communication system and electric field communication method - Google Patents

Description

  The present invention relates to an electric field communication system and an electric field communication method for inducing an electric field based on information to be transmitted in an electric field transmission medium and detecting the induced electric field to transmit and receive information.

  Although wearable computers are attracting attention due to the miniaturization and high performance of portable terminals, FIG. 16 shows an example in which such wearable computers are used while being worn by humans. As shown in the figure, the wearable computer 7 is mounted on a person's arm, shoulder, torso, etc. via a transceiver 9 to transmit / receive data to / from each other, and is provided on the wall or floor so that it can be touched by the tip of a limb. Communication is performed with a computer 8 provided outside via the transceivers 9a and 9b and cables.

Here, the transceiver 9 used for data communication between the wearable computer 7 and between the wearable computer 7 and the computer 8 induces an electric field based on information to be transmitted to a living body that is an electric field transmission medium. Information is transmitted and received using an induced electric field. The transceiver 9 is described in Patent Document 1 and Patent Document 2.
JP 2001-352298 A JP 2006-081111 A

  Now, the electric field induced by the user carrying the wearable computer 7 and the transceiver 9 is coupled (electrostatically coupled) to a nearby third party who does not have the wearable computer 7 or 9, and the third party has the floor or the like. Touching the transceivers 9a and 9b provided in the computer 8 may cause the computer 8 to receive the data transmitted from the wearable computer 7 by mistake.

  In this case, the computer 8 may erroneously recognize that the data is from a user carrying the wearable computer 7 or 9 and perform a malfunction such as opening an automatic door for a third party.

  The present invention has been made to solve the above-described problem, and an object thereof is to prevent erroneous recognition and malfunction due to coupling in an electric field communication system that transmits and receives information via an electric field transmission medium.

  In order to achieve the above object, the present invention provides an electric field communication system that communicates via an electric field transmission medium, and induces an electric field based on information to be transmitted to a portable terminal carried by a user in the electric field transmission medium. A first transceiver configured to detect an induced electric field and transmit / receive information; and a control device connected to the first transceiver, wherein the portable terminal transmits the electric field based on the information to be transmitted to the electric field A second transceiver that induces the medium and detects the induced electric field to transmit and receive information to and from the first transceiver; an ID transmission unit that transmits an ID signal including an ID of the portable terminal or the user; Receiving means for receiving a received signal from the control device, and processing request transmitting means for transmitting a processing request signal when the receiving means receives the received signal, Serial control device receives the ID signal from the portable terminal has a signal transmitting means for transmitting the received signal, and receives the processing request signal from said mobile terminal, and a control means for performing a predetermined control, the.

  The present invention is also an electric field communication method performed by an electric field communication system communicating via an electric field transmission medium, wherein the electric field communication system transmits an electric field based on information to be transmitted to a portable terminal carried by a user. A first transceiver that induces the medium and detects the induced electric field to transmit and receive information; and a control device connected to the first transceiver; and the portable terminal transmits information to be transmitted And a second transceiver that transmits and receives information to and from the first transceiver by detecting an induced electric field in the electric field transmission medium, and receiving an ID signal including the ID of the portable terminal or the user An ID transmitting step for transmitting, a receiving step for receiving a received signal from the control device, and a process for transmitting a processing request signal when receiving the received signal. A request transmission step, wherein the control device receives an ID signal from the portable terminal and transmits a reception signal; receives a processing request signal from the portable terminal and executes predetermined control; And a control step.

  According to the present invention, in an electric field communication system that transmits and receives information through an electric field transmission medium, it is possible to prevent erroneous recognition and malfunction due to coupling by providing a mobile terminal with a reception function as well as a transmission function. it can.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. The electric field communication system of the present embodiment is output from the portable terminal of the person carrying the portable terminal in consideration of the communication effective electric field distance when the radiation is directly emitted from the portable terminal 1 and when the secondary radiation is emitted from the human body. The electric field couples (electrostatic coupling) to a person who does not have a nearby portable terminal, and the signal of the portable terminal is transmitted to the control device via a person who does not have the portable terminal, causing the control device to recognize and malfunction. It is what prevents it.

  FIG. 1 is an overall configuration diagram of an electric field communication system according to a first embodiment of the present invention. The illustrated electric field communication system includes a portable terminal 1 carried by a user, a transceiver 5 installed in a predetermined area such as a floor, a control device 6 connected to the transceiver 5, and a processing device 7. The control device 6 receives a signal (information, data) transmitted from the mobile terminal 1 and performs predetermined control on the processing device 7. In the present embodiment, the processing device 7 is an automatic door, and the control device 6 will be described below as an example of opening and closing the automatic door in response to a signal from the mobile terminal 1. The processing device 7 is not limited to an automatic door, and may be a gate device such as a ticket gate.

  FIG. 2 is a schematic configuration diagram of the mobile terminal 1 of the present embodiment.

  The illustrated mobile terminal 1 includes a computer 2 and a transceiver 3 (second transceiver). The computer 2 includes an ID transmission unit 21, a reception unit 22, an Action signal transmission unit 23 (processing request transmission unit), and a storage unit 24. The ID transmission unit 21 transmits the ID stored in advance in the storage unit 24 at a predetermined polling interval. The ID stored in the storage unit 24 is identification information such as a user ID or a mobile terminal ID of a user who carries the mobile terminal 1. The receiving unit 22 receives a signal transmitted from the control device 6. When the reception unit 22 receives a signal from the control device 6, the Action signal transmission unit 23 transmits an Action signal (processing request signal) for requesting the processing device 7 to operate.

  The transceiver 3 uses a signal detection technique based on an electro-optic technique using a laser beam and an electro-optic crystal, and induces an electric field based on information to be transmitted in a living body that is an electric field transmission medium. Used to transmit and receive information.

  For example, the transceiver 3 has the configuration shown in FIG. 2. When transmission data from the computer 2 is received via the input / output (I / O) circuit 901, the transmission data is received via the transmission unit 902 and the electrode 903. And an electric field is induced in the electric field transmission medium through the electrode 903 and the insulating film 904, and this electric field is transmitted to other parts of the electric field transmission medium.

  The transceiver 3 detects an electric field induced and transmitted by the electric field transmission medium with the electrode 903 via the insulating film 904, and couples the electric field to the electric field detection optical unit 905 to convert it into an electric signal. This electric signal is subjected to signal processing such as amplification and noise removal by the signal processing circuit 906, further subjected to waveform shaping by the waveform shaping circuit 907, and output to the computer 2 via the input / output circuit 901. ing.

  FIG. 3 is a schematic configuration diagram of the control device 6 and the transceiver 5. The control device 6 and the transceiver 5 are connected by a network such as a LAN.

  The transceiver 5 (first transceiver) has the same configuration as that of the transceiver 3 of the portable terminal 1 and uses a signal detection technique based on an electro-optic technique using a laser beam and an electro-optic crystal, and should be transmitted. This is a transceiver that induces an electric field based on information in a living body that is an electric field transmission medium, and transmits and receives information using the induced electric field.

  As shown in FIG. 1, the electrode 903 and the insulating film 904 of the transceiver 5 according to the present embodiment are connected to the transceiver main bodies 901, 902, 905, 906, 907 by cables and can be contacted by the user. It shall be installed in a place (floor, wall, gate, door, etc.). When the user carrying the portable terminal 1 contacts the electrode 903 and the insulating film 904 of the transceiver 5, the communication path between the portable terminal 1 and the control device 6 is established via the transceiver 5 and the user's human body that is an electric field transmission medium. Established.

  The control device 6 receives a signal transmitted from the mobile terminal 1 and controls the processing device 7 connected by a network such as a LAN. The illustrated control device 6 includes a signal transmission unit 61, a control unit 62, an ID storage unit 63, and a log information storage unit 64. When the signal transmission unit 61 receives the ID signal from the mobile terminal 1, the signal transmission unit 61 transmits a Received signal (reception signal) to the mobile terminal 1.

  When receiving the Action signal from the mobile terminal 1, the control unit 62 controls the processing device 7. In this embodiment, since the processing device 7 is an automatic door, when receiving the Action signal, the control unit 62 transmits a lock release control signal to the automatic door and opens the automatic door. When the Action signal is not transmitted from the mobile terminal 1, the control unit 62 does not transmit the lock release control signal to the automatic door, and thus the automatic door remains closed. The ID storage unit 63 stores a plurality of IDs of legitimate users or portable terminals 1.

  The computer 2 and the control device 6 of the portable terminal 1 use a general-purpose computer system including at least a CPU, a memory, a storage device, a communication control device, and a bus connecting these devices. be able to. In this computer system, each function of the computer 2 and the control device 6 is realized by the CPU executing a predetermined program loaded on the memory.

  Next, the processing of this embodiment will be described.

  FIG. 4 is a diagram schematically illustrating a normal operation process in which the control device 6 opens the automatic door 7 when the user A carrying the mobile terminal 1 contacts the transceiver 5.

  When the user A contacts the transceiver 5, the mobile terminal 1 transmits an ID signal to the control device 6 through the human body of the user A and the transceiver 5. And the control apparatus 6 will transmit a Received signal to the portable terminal 1, if ID signal is received. And the portable terminal 1 will transmit an Action signal to the control apparatus 6, if a Received signal is received. When receiving the Action signal, the control device 6 transmits a lock release control signal to the automatic door 7 and opens the automatic door 7.

  Next, the normal process of FIG. 4 will be described in more detail.

  FIG. 5 is a sequence diagram of the normal process of FIG. FIG. 6 shows packet configuration examples of various signals transmitted by the mobile terminal 1 and the control device 6. As shown in FIG. 6 (0), the basic configuration of the packet includes ID information of the mobile terminal 1, ID information of the control device 6, a Received flag, an Action flag, time information, and parity.

  First, the user A carrying the mobile terminal 1 contacts the electrode 903 and the insulating film 904 (hereinafter referred to as “electrode 903 etc.”) of the transceiver 5 installed on the floor or the like in front of the automatic door 7. As a result, a communication path is established between the computer 2 of the mobile terminal 1 and the control device 6 via the transceiver 3 of the mobile terminal 1, the human body of the user A as the electric field transmission medium, and the transceiver 5. And the ID transmission part 21 of the computer 2 transmits the ID signal shown in FIG. 6 (1) to the control apparatus 6 via the said communication path (S11). That is, the ID transmission unit 21 generates and transmits an ID signal in which the ID stored in the storage unit 24 and the parity are set.

  And the signal transmission part 61 of the control apparatus 6 will discriminate | determine whether ID of the said ID signal is a valid ID memorize | stored in the ID memory | storage part 63, if an ID signal is received (S12). In the case of the ID stored in the ID storage unit 63, the signal transmission unit 61 transmits the Received signal shown in FIG. 6 (2) to the mobile terminal 1 via the communication path (S13). The signal transmission unit 61 sets the ID of the control device 6, the Received flag and the reception time of the ID signal in the packet of the ID signal transmitted from the mobile terminal 1, and generates a Received signal in which the parity is set. ,Send. It is assumed that the ID of the control device 6 is stored in a storage device such as a memory.

  The Received flag is a flag indicating that the ID is a valid ID stored in the ID storage unit 63. In the case of an ID signal of an unauthorized ID that is not stored in the ID storage unit 63, the signal transmission unit 61 transmits a Received signal for which the Received flag is not set, or does not transmit a Received signal.

  And the receiving part 22 of the portable terminal 1 receives a Received signal. When the receiving signal is received by the receiving unit 22, the action signal transmitting unit 23 transmits the action signal illustrated in FIG. 6 (3) to the control device 6 via the communication path (S <b> 14). That is, the Action signal transmission unit 23 sets the Action flag in the Received signal packet transmitted from the control device 6 and generates and transmits the Action signal packet in which the parity is set.

  In addition, when the Received signal for which the Received flag is not set is received, or when the Received signal is not received, the Action signal transmission unit 23 does not transmit the Action signal.

  And the control part 62 of the control apparatus 6 will transmit a lock release control signal to an automatic door, and will open an automatic door, if an Action signal is received (S15). Further, the control unit 62 stores the log information (FIG. 6 (4)) in which the parity information is set by rewriting the time information of the packet of the received Action signal with the time of receiving the Action signal in the log information storage unit 64. .

  By the normal process described above, the control device 6 sends a lock release control signal to the automatic door and opens the automatic door when the user A carrying the portable terminal 1 contacts the transceiver 5.

  Next, the electric field output from the mobile terminal 1 of the user A who carries the mobile terminal 1 is coupled (electrostatically coupled) to the user B who does not have the nearby mobile terminal 1, and the mobile terminal 1 passes through the user B. The operation when the ID signal is transmitted to the control device 6 will be described.

  FIG. 7 is a diagram schematically showing an operation when the ID signal of the mobile terminal 1 of the user A is transmitted to the control device 6 when the user B contacts the transceiver 5.

  The communication effective electric field distance when the mobile terminal 1 is directly radiated (primary radiation) is defined as the first distance, and the communication effective electric field distance radiated through the human body is defined as the second distance (closest distance). Distance). Generally, the first distance is greater than the second distance because the intensity of the electric field when directly emitted is greater than the intensity of the secondary radiation field. A user A who carries the mobile terminal 1 and a user B who does not have the mobile terminal 1 exist within a distance within the first distance and beyond the second distance (hereinafter, “near”). It shall be.

  The electric field output from the mobile terminal 1 of the user A who carries the mobile terminal 1 is coupled to the nearby user B. Thereby, when the user B who does not have the portable terminal 1 contacts the transceiver 5, the portable terminal 1 transmits an ID signal to the control device 6 via the human body of the user A, the human body of the user B, and the transceiver 5.

  And the control apparatus 6 will transmit a Received signal to the portable terminal 1, if ID signal is received. Here, since the electric field intensity secondary-radiated through the human body of the user B is smaller than that directly radiated, the electric field output from the user B is cupped to the user A in the vicinity away from the second distance. Do not ring. Therefore, the receiving unit 22 of the mobile terminal 1 of the user A cannot receive the Received signal. Thereby, the Action signal transmission unit 23 does not transmit the Action signal (FIG. 5: S14).

  Therefore, since the action signal is not transmitted, the control unit 62 of the control device 6 does not transmit the lock release control signal (FIG. 5: S15), and the automatic door 7 remains closed. That is, even when the user B who does not carry the portable terminal 1 contacts the transceiver 5 and transmits an ID signal by coupling, the control device 6 is an error that is an ID signal from the user A carrying the portable terminal 1. It is possible to prevent a malfunction that is recognized and unlocks the automatic door.

  Next, an electric field communication system which is a comparative example of the present invention will be described.

  FIG. 8 is a diagram schematically showing the operation of the electric field communication system of the comparative example. A portable terminal 1X of the electric field communication system shown in the figure has a function as a transmitter, and includes an ID transmitter that transmits an ID and a transceiver that transmits an ID transmitted by the ID transmitter. In addition, when the ID transmitted from the mobile terminal 1X is a valid ID stored in the storage unit, the control device 6X transmits a lock release control signal to the automatic door.

  First, the electric field output from the portable terminal 1X of the user A who carries the portable terminal 1X is coupled to the nearby user B. When the user B who does not have the mobile terminal 1 </ b> X contacts the transceiver 5, the mobile terminal 1 </ b> X transmits an ID signal to the control device 6 </ b> X via the human body of the user A, the human body of the user B, and the transceiver 5. Then, when the received ID signal is a valid ID stored in the storage unit, the control device 6X transmits a lock release control signal to the automatic door and opens the automatic door 7.

  That is, in the electric field communication system shown in FIG. 8, if the user A carrying the portable terminal 1X exists in the vicinity even though the user B does not have the portable terminal 1X, the control device 6X sends the ID signal from the user A. It is misrecognized as being and the automatic door malfunctions. As a result, the user A who carries the portable terminal 1X enters the user B, who is a third party, unintentionally.

  On the other hand, in the first embodiment, the mobile terminal 1 only transmits an ID signal in consideration of the communication effective electric field distance in the case of direct radiation from the mobile terminal 1 and the case of secondary radiation from the human body. Instead, the signal from the control device 6 is received and the action signal is transmitted. Thereby, even if the electric field output from the portable terminal 1 of the user carrying the portable terminal 1 is coupled to a third party who does not have the nearby portable terminal 1, the ID signal is transmitted to the control device via the third party. Even if transmitted to 6, the signal transmitted by the control device 6 does not reach the portable terminal 1. Therefore, in the present embodiment, unlike the comparative example of FIG. 8, the user who carries the mobile terminal 1 enters by bringing together a third party who does not have the mobile terminal 1 unintentionally. It is possible to prevent erroneous recognition and malfunction.

  In addition, the control device 6 of the first embodiment logs the log information in which the ID of the mobile terminal side and the control device side, the time when the Action signal is received, etc. are transmitted after transmitting the unlock control signal to the automatic door. Store in the information storage unit. Thereby, the entrance / exit of the user who opened the automatic door can be managed centrally.

<Second Embodiment>
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. The electric field communication system of the present embodiment is different from the first embodiment in the signals and sequences transmitted and received between the mobile terminal and the control device.

  The overall configuration of the electric field communication system according to the second embodiment includes a mobile terminal, a transceiver, a control device, and a processing device, similarly to the electric field communication system according to the first embodiment shown in FIG.

  However, the portable terminal 1A of the second embodiment and the control device 6A are different from the portable terminal 1 and the control device 6 of the first embodiment in the following points.

  FIG. 9 is a schematic configuration diagram of a mobile terminal 1A according to the second embodiment.

  The illustrated mobile terminal 1A includes a computer 2A and a transceiver 3A (second transceiver). The transceiver 3A is the same as the transceiver 3 of the mobile terminal 1 of the first embodiment. The computer 2 </ b> A includes a reception unit 22, an action signal transmission unit 23 (processing request transmission unit), and a storage unit 24. The receiving unit 22 receives a signal transmitted by the control device 6A. When the reception unit 22 receives a signal from the control device 6A, the Action signal transmission unit 23 transmits an Action signal (processing request signal) for requesting the processing device 7 to operate. Note that the Action signal includes an ID stored in advance in the storage unit 24.

  The control device 6A of the second embodiment is similar to the control device 6 of the first embodiment shown in FIG. 3 in that the signal transmission unit 61, the control unit 62, the ID storage unit 63, and the log information storage unit 64 are used. And have. The signal transmission unit 61 transmits a confirmation signal to the mobile terminal 1, and the control unit 62 controls the processing device 7 when receiving the Action signal from the mobile terminal 1.

  Next, the processing of this embodiment will be described.

  FIG. 10 is a diagram schematically illustrating a normal operation process in which the control device 6A opens the automatic door 7 when the user A carrying the portable terminal 1A contacts the transceiver 5.

  When the user A carrying the portable terminal 1A contacts the transceiver 5, the control device 6A transmits a confirmation signal to the portable terminal 1 via the transceiver 5 and the user A's human body. And 1 A of portable terminals will transmit an Action signal to 6 A of control apparatuses, if a confirmation signal is received. Then, when receiving the Action signal, the control device 6 </ b> A transmits a lock release control signal to the automatic door 7 and opens the automatic door 7.

  Next, the normal processing of FIG. 10 will be described in more detail.

  FIG. 11 is a sequence diagram of the normal process of FIG. FIG. 12 shows a packet configuration example of various signals transmitted by the mobile terminal 1A and the control device 6A. As shown in FIG. 12 (0), the basic configuration of the packet includes ID information of the mobile terminal 1A, ID information of the control device 6A, a confirmation flag, an Action flag, time information, and parity.

  First, the user A carrying the mobile terminal 1A contacts the electrode 903 of the transceiver 5 installed on the floor or the like in front of the automatic door 7. Thereby, a communication path is established between the computer 2A of the portable terminal 1A and the control device 6A via the transceiver 3A of the portable terminal 1A, the human body of the user A as an electric field transmission medium, and the transceiver 5.

  And the signal transmission part 61 of 6 A of control apparatuses transmits the confirmation signal shown in FIG. 12 (1) to the portable terminal 1A via the said communication path (S21). That is, the signal transmission unit 61 generates and transmits a confirmation signal in which the ID, confirmation flag, current time, and parity of the control device 6 are set. It is assumed that the ID of the control device 6A is stored in a storage device such as a memory.

  Then, the receiving unit 22 of the mobile terminal 1A receives the confirmation signal in which the confirmation flag is set, and switches the state of the mobile terminal 1A from the reception standby mode to the operation mode. Thereby, the Action signal transmission unit 23 transmits the Action signal shown in FIG. 12 (2) to the control device 6A via the communication path (S22). That is, the Action signal transmission unit 23 sets the ID and the Action flag stored in the storage unit 24 in the confirmation signal packet transmitted from the control device 6A, and generates an Action signal packet in which the parity is set, Send. Note that the portable terminal 1A operates in the reception standby mode in order to reduce power consumption until the confirmation signal is received.

  Then, when receiving the Action signal, the control unit 62 of the control device 6A determines whether or not the ID included in the Action signal is a valid ID stored in the ID storage unit 63 (S23). In the case of the ID stored in the ID storage unit 63, the control unit 62 transmits an unlock control signal to the automatic door and opens the automatic door (S24). In the case of an unauthorized ID not stored in the ID storage unit 63, the control unit 62 does not transmit a lock release control signal to the automatic door.

  Then, the control unit 62 stores the log information (FIG. 12 (3)) in which the time information of the packet of the received Action signal is rewritten to the time of receiving the Action signal and the parity is set (FIG. 12 (3)) in the log information storage unit 64. .

  By the normal processing described above, the control device 6A sends an unlock control signal to the automatic door and opens the automatic door when the user A carrying the mobile terminal 1A contacts the transceiver 5.

  Next, an operation when the electric field output from the mobile terminal 1A of the user A carrying the mobile terminal 1A is coupled (electrostatic coupling) to the user B who does not have the nearby mobile terminal 1A will be described.

  FIG. 13 is a diagram schematically showing an operation when the user B near the user A contacts the transceiver 5.

  As in the first embodiment, the user A carrying the mobile terminal 1A and the user B not having the mobile terminal 1A are within a first distance and a distance exceeding the second distance. It shall be in the vicinity. As described above, the first distance is a communication effective electric field distance when directly radiating from the mobile terminal 1, and the second distance is a communication effective electric field distance radiating secondary radiation through the human body.

  When the user A carrying the portable terminal 1 </ b> A contacts the transceiver 5, the control device 6 </ b> A transmits a confirmation signal via the transceiver 5. Here, since the user B and the user A are separated from each other by the second distance, the coupling to the user A through the user B does not occur. Therefore, the receiving unit 22 of the mobile terminal 1A cannot receive the confirmation signal and remains in the reception standby mode. Thereby, the Action signal transmission part 23 of 1 A of portable terminals does not transmit an Action signal (FIG. 11: S22).

  Therefore, since the action signal is not transmitted, the control unit 62 of the control device 6A does not transmit the lock release control signal (FIG. 11: S24), and the automatic door 7 remains closed. That is, even when the user B who does not have the portable terminal 1A in the vicinity of the user A contacts the transceiver 5, it is possible to prevent a malfunction that the control device 6A unlocks the automatic door.

  In the second embodiment described above, when the portable terminal 1A receives a signal from the control device 6A, the portable terminal 1A cancels the reception standby mode and transmits an action signal. Thereby, even when the electric field output from the mobile terminal 1A of the user carrying the mobile terminal 1 is coupled to a third party who does not have the nearby mobile terminal 1A, the signal transmitted by the control device 6A is Since secondary radiation is emitted from the human body of a third party, no coupling occurs and the portable terminal 1A does not reach. Therefore, in this embodiment, it is possible to prevent erroneous recognition and malfunction due to coupling, such as a user carrying the mobile terminal 1A unintentionally bringing in a third party who does not have the mobile terminal 1A. be able to.

  Further, the portable terminal 1A of the second embodiment is set to the reception standby mode until the confirmation signal is received from the control device 6A, and is set to the operation mode when the confirmation signal is received. Thereby, the power consumption of 1 A of portable terminals can be reduced, and the lifetime of a battery can be lengthened.

  Further, the control device 6A of the second embodiment logs the log information in which the IDs of the mobile terminal side and the control device side, the time when the Action signal is received, and the like are transmitted after transmitting the unlock control signal to the automatic door. Store in the information storage unit. Thereby, the entrance / exit of the user who opened the automatic door can be managed centrally.

<Third Embodiment>
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. In the electric field communication system of this embodiment, the transceiver used for the portable terminal and the control device is different from that of the first embodiment.

  The overall configuration of the electric field communication system according to the third embodiment includes a mobile terminal, a transceiver, a control device, and a processing device, similarly to the electric field communication system according to the first embodiment illustrated in FIG.

  FIG. 14 is a schematic configuration diagram of a mobile terminal 1B of the third embodiment.

  The illustrated mobile terminal 1B includes a computer 2 and a transceiver 3B (second transceiver). The computer 2B is different from the computer 2 of the first embodiment in that a transmission / reception switching signal is output to the transceiver 3B together with transmission data (ID signal, action signal, etc.), and the computer 2 of the first embodiment is otherwise. It is the same. The transmission / reception switching signal is a signal for instructing the transceiver 3B to switch between transmission and reception operations.

  The transceiver 3B according to the present embodiment is a transceiver that induces an electric field based on information to be transmitted in a living body that is an electric field transmission medium, and transmits and receives information using the induced electric field. A unit 802, a receiving unit 803 for receiving data, an I / O circuit 901, an electrode 903, and an insulating film 904 are provided.

  When the transmission data from the computer 2B is received via the input / output (I / O) circuit 901, the transceiver 3B supplies the transmission data to the electrode 903 via the transmission unit 802, and the electrode 903 and the insulating film 904 are connected. Then, an electric field is induced in the electric field transmission medium, and this electric field is transmitted to other parts of the electric field transmission medium. The transmission unit 802 includes a modulation circuit 804 for modulating transmission data with a carrier wave output from the oscillator 805 and an oscillator 805 for outputting a carrier wave.

  The transceiver 3B detects an electric field induced and transmitted by the electric field transmission medium by the electrode 903 through the insulating film 904, converts the electric field into reception data by the receiving unit 803, and passes through the input / output circuit 901. To the computer 2B. Based on the received signal and the correction circuit 806 for determining and correcting whether the H and L levels of the demodulated signal have been inverted, and the carrier wave reproduced by the carrier wave reproduction circuit 808. A demodulation circuit 807 for reproducing data and a carrier wave reproduction circuit 808 for extracting a carrier wave from the received signal are provided.

  FIG. 15 is a schematic configuration diagram of the control device 6B and the transceiver 5B of the third embodiment. The transceiver 5B (first transceiver) has the same configuration as that of the transceiver 3B of the portable terminal 1B. The transceiver 5B induces an electric field based on information to be transmitted in a living body that is an electric field transmission medium, and uses the induced electric field for information. It is a transceiver that transmits and receives.

  The illustrated control device 6B is different from the control device 6 of the first embodiment in that a transmission / reception switching signal is output to the transceiver 3B together with transmission data (Received signal or the like), and the other control is the control of the first embodiment. This is the same as the device 6.

  In the third embodiment, the same processing as that in the first embodiment is performed using the transceivers 3B and 5B described with reference to FIGS.

  Further, the transceivers 3B and 5B of the present embodiment may be applied to the second embodiment, and the same processing as that of the second embodiment may be performed using the transceivers 3B and 5B of the present embodiment.

  While the embodiments of the present invention have been described above, various modifications and changes can be made to the embodiments of the present invention without departing from the spirit of the present invention.

1 is an overall configuration diagram of an electric field communication system according to the present invention. It is a block diagram of the portable terminal of 1st Embodiment. It is a block diagram of a control apparatus and a transceiver. It is the figure which showed the operation | movement of normal processing typically. It is a sequence diagram of the operation of normal processing. It is a packet block diagram of various signals. It is the figure which showed typically the operation | movement at the time of coupling with the nearby user. It is the figure which showed typically the operation | movement in the electric field communication system of a comparative example. It is a block diagram of the portable terminal of 2nd Embodiment. It is the figure which showed the operation | movement of normal processing typically. It is a sequence diagram of the operation of normal processing. It is a packet block diagram of various signals. It is the figure which showed typically the operation | movement when the nearby user contacts a transceiver. It is a block diagram of the portable terminal of 3rd Embodiment. It is a block diagram of the control apparatus and transceiver of 3rd Embodiment. It is explanatory drawing which shows the example in the case of mounting | wearing and using a wearable computer for a person via a transceiver.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A, 1B Portable terminal 2,2A, 2B Computer 3,3A, 3B, 5,5B Transceiver 6,6A, 6B Control device 7 Processing device 21 ID transmission unit 22 Reception unit 23 Action signal transmission unit 24 Storage unit 61 Signal Transmission unit 62 Control unit 63 ID storage unit 64 Log information storage unit

Claims (4)

An electric field communication system for communicating via an electric field transmission medium,
A mobile terminal carried by the user;
A first transceiver that induces an electric field based on information to be transmitted in the electric field transmission medium and detects the induced electric field to transmit and receive information;
A control device connected to the first transceiver;
The portable terminal is
A second transceiver for inducing an electric field based on information to be transmitted in the electric field transmission medium and detecting the induced electric field to transmit / receive information to / from the first transceiver;
ID transmitting means for transmitting an ID signal containing the ID of the portable terminal or user;
Receiving means for receiving a received signal from the control device;
A processing request transmitting means for transmitting a processing request signal when the receiving means receives a received signal;
The controller is
Signal transmitting means for receiving an ID signal from the portable terminal and transmitting the received signal;
Receiving a processing request signal from the portable terminal, and performing a predetermined control,
An electric field communication system. The electric field communication system according to claim 1,
The control device further includes ID storage means in which a plurality of IDs are stored,
The electric field communication system, wherein the signal transmission means transmits the reception signal when an ID included in the ID signal exists in the ID storage means. The electric field communication system according to claim 1,
The control means sets the time when the processing request signal is received in the processing request signal received from the portable terminal, and stores the time in the log information storage unit. An electric field communication method performed by an electric field communication system that communicates via an electric field transmission medium,
The electric field communication system includes: a portable terminal carried by a user; a first transceiver that induces an electric field based on information to be transmitted in an electric field transmission medium and detects the induced electric field to transmit and receive information; and A control device connected to one transceiver,
The portable terminal is
A second transceiver for inducing an electric field based on information to be transmitted in the electric field transmission medium, detecting the induced electric field, and transmitting / receiving information to / from the first transceiver;
An ID transmission step of transmitting an ID signal including the ID of the portable terminal or the user;
A reception step of receiving a reception signal from the control device;
When the received signal is received, a processing request transmission step of transmitting a processing request signal is performed.
The controller is
A signal transmission step of receiving an ID signal from the portable terminal and transmitting a reception signal;
Receiving a processing request signal from the portable terminal and performing a predetermined control;
An electric field communication method characterized by the above.

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