JP2010016776A - Communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more improve application of human body communication or human body-like communication. <P>SOLUTION: When data of a mobile unit ID transmitted from a mobile unit side transmitter 61 of a mobile unit 6 carried by a user 2 and from a D-seat transmitter 5a of a D seat 3a in a vehicle via a body of the user 2 are superimposed with data of a seat ID and received by a handle receiver 7, in accordance with setting information of a seat position corresponding to the mobile unit ID, setting of a seat position of the D seat 3a, on which the user 2 sits down, is performed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a communication system.

2. Description of the Related Art Conventionally, a technique for performing communication using a human body as a transmission path is known. For example, Patent Document 1 discloses a technique for transmitting a user ID from a transmitter module carried by the user to a control panel of an ATM (automatic teller machine) via the user's body.
Japanese Patent Laid-Open No. 10-228524

  However, Patent Document 1 describes only one-to-one human body communication between two units such as a transmitter module and an ATM control panel. That is, the technique disclosed in Patent Document 1 assumes only one-to-one human body communication between two units, and is applicable to more complicated systems such as a system using one-to-multiple communication. Had the problem of being scarce.

  In addition, the communication performed through a predetermined conductor communication medium instead of the human body in human body communication (hereinafter referred to as human body communication-like communication) has the same problem.

  The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to make it possible to further enhance the applicability of human body communication or human body communication-like communication.

  In order to solve the above problem, the system according to claim 1 is a communication system in which a communication device carried by a user performs communication using the user's body or a predetermined conductor communication medium as a transmission path. A plurality of units including the communication device, and a body of the user from one or a plurality of the transmission units of the unit, including a transmission unit capable of transmitting data via a body or a predetermined conductor communication medium Alternatively, a receiving unit that receives data transmitted via the predetermined conductor communication medium, a determination unit that determines whether or not a plurality of types of data is received by the receiving unit, and the determination unit And a control unit that performs control according to the determination result in (5).

  According to this, control is performed according to whether or not a plurality of types of data transmitted from a transmission unit of a plurality of units via a user's body or a predetermined conductor communication medium are received by the reception unit. Therefore, it is possible to apply human body communication and human body communication-like communication to a system that controls devices using one-to-multiple communication. Therefore, according to the structure of Claim 1, it becomes possible to improve the applicability of human body communication or human body-like communication.

  In addition, according to the configuration of claim 1, it is possible to determine whether or not a plurality of types of data has been received in a superimposed manner. It can be specified that there is, and if it is superimposed, it can be specified that there are two or more units that have transmitted data. That is, the number of units that transmitted data can be specified.

  Further, in the human body communication system according to claim 2, when the plurality of types of data transmitted from the respective transmission units are superimposed, the transmission units of the plurality of units have the waveform peaks of the respective signals mutually. The plurality of types of data are transmitted by controlling the timing so as not to overlap.

  According to this, even when a plurality of types of data transmitted from the transmission units of a plurality of units are superimposed, the peaks of the waveform of each data signal do not overlap each other. However, these multiple types of data can be easily separated.

  In the human body communication system according to claim 3, the determination unit stores the waveform of the data signal of the plurality of units in advance, and stores the waveform of the signal of the data received by the reception unit. If the waveform of the data signal is compared and does not match, it is determined that the peaks of the waveform of the data signal overlap, and it is determined that a plurality of types of data are received by the receiving unit. It is characterized by that.

  According to this, even when a plurality of types of data transmitted from the transmission units of a plurality of units are superimposed, even if the peaks of the waveform of the data signal are overlapped, a plurality of types of data are superimposed on the reception unit. It is possible to determine whether or not it has been received and perform control according to the determination result.

  In the human body communication system according to claim 4, the plurality of units include the communication device and a vehicle seat, and an identifier for identifying a user and the seat position setting information in association with each other in advance. The seat transmission unit further includes a setting information storage memory that stores seating data, which is data indicating that the user is seated on the seat after the seating of the user on the seat, via the user's body. The transmission unit of the communication device transmits user identifier data, which is data indicating an identifier for identifying the user carrying the communication device, superimposed on the transmission of the seating data and transmits it through the user's body. When the determination unit determines that the user identifier data and the seating data are superimposed and received by the reception unit, the control unit Based on the identifier data, sheet position setting information corresponding to the identifier indicated by the user identifier data is obtained from the setting information storage memory, and the sheet position of the sheet is adjusted in accordance with the sheet position setting information. It is characterized by that.

  According to this, when the receiving unit superimposes user identifier data and seating data sent via the user's body from the transmitting unit of the communication device carried by the user and the transmitting unit of the vehicle seat Since the seat position of the seat seated by the user can be adjusted according to the seat position setting information corresponding to the identifier indicated by the identifier data, the seat position is adjusted according to the user seated on the seat. Human body communication can be applied to the system. Therefore, according to the structure of Claim 3, the applicability of human body communication can be further improved.

  According to the configuration of claim 4, since the seating data is transmitted to the receiver by human body communication after the user is seated on the seat, and the user identifier data is transmitted superimposed on the receiver, the timing for starting the communication is determined. , Communication time delay can be suppressed. Therefore, the seat position can be adjusted in a timely manner.

  The human body communication system according to claim 5 is characterized in that the communication device is an electronic key of a vehicle.

  According to the fifth aspect, the applicability of human body communication or human body communication-like communication can be further improved.

  In the human body communication system according to claim 6, the plurality of units include a carrying unit carried by a user and a plurality of fixed units respectively disposed at predetermined portions of the vehicle, and the conductor communication medium includes: The fixed unit identifier data, which is arranged for each of the plurality of fixed units and transmits data indicating an identifier for identifying the fixed unit, is transmitted from the transmission unit for each of the plurality of fixed units via the conductor communication medium. The carrying unit transmits carrying unit identifier data which is data indicating an identifier for identifying the carrying unit via the conductor communication medium, and the control unit receives the fixed unit identifier data and the data at the receiving unit. When the determination unit determines that the mobile unit identifier data has been received superimposed, the fixed unit Based on bets identifier data and said portable unit identifier data, is characterized by performing control which the portable unit to the fixed unit to identify whether there.

  According to this, when the carrying unit is present in any of the plurality of fixed units of the vehicle, it is transmitted via the predetermined conductor communication medium from the transmitting unit of the fixed unit and the transmitting unit of the carrying unit. Since the receiving unit receives data in which the fixed unit identifier data and the portable unit identifier data are superimposed, the fixed unit identifier data and the portable unit identifier data are used to determine which fixed unit has the portable unit. It becomes possible to specify whether it exists. Therefore, according to the structure of Claim 6, it becomes possible to improve the applicability of human body-like communication.

  In the human body communication system according to claim 7, the plurality of units include an electronic key of a vehicle carried by a user and each seat of the vehicle, and further includes a presentation unit that presents information, and the conductor communication A medium is arranged for each seat of the vehicle, and a transmission unit for each seat transmits seat identifier data, which is data indicating an identifier for identifying the seat, via the conductor communication medium, and the electronic From the key, key identifier data which is data indicating an identifier for identifying the electronic key is transmitted via the conductor communication medium, and the control unit receives the seat identifier data and the key identifier data at the receiving unit. If the determination unit determines that the electronic key is superimposed and received, the electronic key is present in any seat based on the seat identifier data and the key identifier data. Or detects, is characterized in that to present the detection result to the presentation unit.

  According to this, when the electronic key of the vehicle is present in any of the vehicle seats, the electronic key is transmitted from the transmission unit of the vehicle seat and the transmission unit of the electronic key via the predetermined conductor communication medium. Since the reception unit receives the data in which the seat identifier data and the key identifier data are superimposed, it detects which seat has the electronic key based on whether or not the seat identifier data and the key identifier data are superimposed. Thus, the seat information can be presented. Therefore, according to the structure of Claim 5, it becomes possible to improve the applicability of human body-like communication.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a sheet memory system 100 to which the present invention is applied. A seat memory system 100 shown in FIG. 1 includes a control device 1, a D seat 3 a, a portable device 6, and a handle receiver 7. The D sheet 3a includes a D sheet transmitter 5a, and the portable device 6 includes a portable device-side transmitter 61. It is assumed that the control device 1, the D seat 3a, and the handle receiver 7 are installed in the vehicle. The user 2 is an occupant who rides on the vehicle.

  The D seat 3a is a seat of the driver's seat (D seat), and includes the D seat transmitter 5a as described above. The D sheet 3a also includes an adjusting device (not shown) for adjusting the sheet position in accordance with a control signal sent from the control device 1.

  The D sheet transmitter 5a is a member for transmitting data to the handle receiver 7 via the user 2 by human body communication. Note that human body communication is communication using a human body as a transmission path as disclosed in, for example, Patent Document 1. Further, in the present embodiment, the following description will be given by taking as an example a case where human body communication is performed by an electric field method of a current method and an electric field method. Furthermore, in this embodiment, the data signal transmitted / received by human body communication shall be a pulse signal represented by a rectangular wave, for example.

  Here, a schematic configuration of the D sheet transmitter 5a will be described with reference to FIG. FIG. 2 is a block diagram showing a schematic configuration of the D sheet transmitter 5a. As shown in FIG. 2, the D sheet transmitter 5a includes a transmitter-side microcomputer 51a, a transmitter-side transmitter circuit 52a, and a transmitter-side communication electrode 53a.

  When the human body communication is established between the D-sheet transmitter 5a and the handle receiver 7, the transmitter-side microcomputer 51a sends a trigger signal to the transmitter-side transmitter circuit 52a. The trigger signal is transmitted toward the portable device-side transmitter 61 of the portable device 6. The transmitter-side microcomputer 51a also identifies the D-sheet 3a when the human body communication is established between the D-sheet transmitter 5a and the handle transmitter 7 (that is, an identifier unique to the D-sheet 3a). The sheet ID data of the D sheet 3a is sent to the transmitter side transmission circuit 52a, and this sheet ID data is sent from the transmitter side transmission circuit 52a to the handle receiver 7 at a predetermined transmission timing (that is, a predetermined value). At a predetermined timing). Note that the predetermined transmission timing mentioned here is determined in advance by the communication protocol in the human body communication of the present embodiment. The communication protocol in the human body communication of this embodiment will be described in detail later.

  The transmitter-side transmitter circuit 52a is the same as a well-known transmitter circuit used for human body communication. When a trigger signal is received from the transmitter-side microcomputer 51a, the transmitter signal is transmitted to the transmitter-side communication electrode. It transmits to the portable machine side transmitter 61 of the portable machine 6 via 53a and the user 2. Further, when receiving the sheet ID data from the transmitter-side microcomputer 51a, the transmitter-side transmission circuit 52a transmits the sheet ID data to the transmitter after a predetermined time has elapsed in accordance with an instruction from the transmitter-side microcomputer 51a. The data is transmitted to the handle receiver 7 through the side communication electrode 53a and the user 2 at a predetermined transmission timing.

  The transmitter-side communication electrode 53a is the same as a well-known communication electrode used for human body communication. Specifically, the transmitter-side communication electrode 53a of the D-sheet transmitter 5a is provided on the D-sheet 3a so that the user 2 can contact the user 2 via an insulator when the user 2 is seated on the D-sheet 3a. It is.

  Returning to FIG. 1, the handle receiver 7 is a member for receiving data transmitted by human body communication from the D sheet transmitter 5 a and the portable device side transmitter 61 of the portable device 6 through the user 2. .

  Here, a schematic configuration of the handle receiver 7 will be described with reference to FIG. FIG. 3 is a block diagram showing a schematic configuration of the handle receiver 7. As shown in FIG. 3, the handle receiver 7 includes a receiver-side communication electrode 71, a receiver-side receiving circuit 72, and a receiver-side microcomputer 73.

  The receiver-side communication electrode 71 is the same as a well-known communication electrode used for human body communication. Specifically, the receiver-side communication electrode 71 of the handle receiver 7 is provided on the handle so that the user 2 can contact the user 2 through an insulator when the user 2 holds the handle.

  The receiver-side receiving circuit 72 is similar to a well-known receiving circuit used for human body communication. When sheet ID data is transmitted from the D sheet transmitter 5a by human body communication, the receiver side The sheet ID data is received via the communication electrode 71. The receiver-side receiving circuit 72 receives sheet ID data from the D-sheet transmitter 5a through human body communication, and the portable device ID data described later from the portable device-side transmitter 61 of the portable device 6 receives human body data. In the case of transmission by communication, the sheet ID data and the portable device ID data are superimposed and received via the receiver-side communication electrode 71. The superimposition of the sheet ID data and the portable device ID data will be described in detail later. Then, the receiver side receiving circuit 72 sends the received data (hereinafter referred to as receiver received data) to the receiver side microcomputer 73.

  When receiving the receiver reception data from the receiver side reception circuit 72, the receiver side microcomputer 73 sends the receiver reception data to the control device 1. Note that the receiver-side receiving circuit and the receiver-side microcomputer of the handle receiver 7 are provided inside a steering column, an instrument panel, or the like, for example.

  Accordingly, the D sheet 3a functions as a unit of claims, the D sheet transmitter 5a functions as a transmitter of claims, and the handle receiver 7 functions as a receiver of claims.

  Returning to FIG. 1, the portable device 6 is a device carried by the user 2 by being worn on the body of the user 2 or being carried by the user 2. A machine 61 is provided.

  The portable device-side transmitter 61 is a member for transmitting data to the handle receiver 7 via the user 2 by human body communication.

  Here, a schematic configuration of the portable device-side transmitter 61 will be described with reference to FIG. FIG. 4 is a block diagram illustrating a schematic configuration of the portable device-side transmitter 61. As shown in FIG. 4, the portable device-side transmitter 61 includes a transmitter-side communication electrode 62, a transmitter-side receiving circuit 63, a transmitter-side microcomputer 64, and a transmitter-side transmitting circuit 65.

  The transmitter-side communication electrode 62 is the same as a well-known communication electrode used for human body communication. Specifically, the transmitter-side communication electrode 62 of the portable device-side transmitter 61 is portable so that the user 2 can contact the user 2 via an insulator when the user 2 is carrying the portable device 6. It is provided in the machine 6.

  The transmitter-side receiving circuit 63 is the same as a well-known receiving circuit used for human body communication. When a trigger signal is transmitted from the D sheet transmitter 5a by human body communication, the transmitter-side receiving circuit 63 This trigger signal is received via the electrode 62. The transmitter-side receiving circuit 63 sends the received trigger signal to the transmitter-side microcomputer 64.

  When receiving the trigger signal from the transmitter-side receiving circuit 63, the transmitter-side microcomputer 64 is data of the portable device ID of the portable device 6 that is an identifier for identifying the portable device 6 (that is, an identifier unique to the portable device 6). Is transmitted to the transmitter-side transmission circuit 65, and the data on the portable device ID is transmitted from the transmitter-side transmission circuit 65 to the handle receiver 7 at a predetermined transmission timing. Note that the predetermined transmission timing mentioned here is determined in advance by the communication protocol in the human body communication of the present embodiment. The portable device ID of the portable device 6 is used as an identifier unique to the user 2 when the owner of the portable device 6 is the specific user 2.

  The transmitter-side transmitter circuit 65 is the same as a well-known transmitter circuit used for human body communication. When the transmitter ID data is received from the transmitter-side microcomputer 64, the transmitter-side transmitter circuit 65 follows the instructions of the transmitter-side microcomputer 64. The portable device ID data is transmitted to the handle receiver 7 via the transmitter-side communication electrode 62 and the user 2 at a predetermined transmission timing. Specifically, when a trigger signal is transmitted from the D sheet transmitter 5a by human body communication, data of the portable device ID is transmitted to the handle receiver 7 by human body communication.

  Therefore, the portable device 6 functions as a unit and a communication device of claims, and the portable device-side transmitter 61 functions as a transmission unit of the claims.

  Here, the communication protocol in the human body communication of the present embodiment will be described with reference to FIG. FIG. 5 is a diagram illustrating an example of sheet ID data of the D sheet 3a, portable device ID data of the portable device 6, and receiver reception data obtained by superimposing these ID data. Here, the transmission timing of the sheet ID data of the D sheet 3a and the transmission timing of the portable device ID data of the portable device 6 will be described as examples.

  In the communication protocol in the human body communication according to the present embodiment, the transmission timing of the data of the sheet ID of the D sheet 3a is determined so as to provide a predetermined vacancy in the transmission timing as shown by being surrounded by a broken line in FIG. Yes. Further, as shown in FIG. 5, the transmission timing of the portable device ID data of the portable device 6 is determined so as to overlap this empty portion. Note that the transmission timing of the sheet ID data of the D sheet 3a and the transmission timing of the data of the portable device ID of the portable device 6 are determined based on the above-described trigger signal, so that the transmission timing of one transmission timing becomes empty. It is possible to overlap. That is, it can be said that the superposition in the present embodiment is to transmit data with reference to the same trigger signal.

  Further, by transmitting the data of the sheet ID of the D sheet 3a and the data of the portable device ID of the portable device 6 at the transmission timing according to the communication protocol in the human body communication of the present embodiment, the D sheet 3a is transmitted by the handle receiver 7. In the receiver reception data obtained when the sheet ID data of the portable device 6 and the portable device ID data of the portable device 6 are superimposed and received, as shown in FIG. It is designed not to overlap. According to such a configuration, even when a plurality of types of data are received by the handle receiver 7 in a superimposed manner, the plurality of types of data can be easily divided and processed by the control device 1 described later. Become.

  The control device 1 is configured as a normal computer, and includes a well-known CPU, ROM, RAM, I / O, and a bus line (all not shown) for connecting these configurations. . A memory such as a ROM or a RAM of the control device 1 stores a portable device ID and sheet position setting information, which is a setting value used for adjusting the sheet position by the adjusting device, in association with each other in advance. Therefore, the control device 1 functions as a setting information storage memory.

  Further, when the receiver reception data is sent from the handle receiver 7, the control device 1 uses the handle receiver 7 to transmit the portable device ID data and the sheet ID data based on the receiver reception data. It is determined whether or not the signal is received in a superimposed manner. This determination is performed according to whether or not portable device ID data exists in an empty portion of the transmission timing of the sheet ID data defined in the above communication protocol. That is, when receiver reception data different from receiver reception data obtained from only one unit is received, it is determined that data is received from a plurality of units. Therefore, the control device 1 also functions as a determination unit in the claims.

  Further, when it is determined that the portable device ID data and the sheet ID data are received by superimposing the control device 1, the control device 1 described above based on the portable device ID data in the received receiver data. The seat position setting information corresponding to the portable device ID is obtained from the memory. Then, according to the obtained sheet position setting information, the above-described adjusting device is caused to adjust the sheet position of the sheet indicated by the sheet ID data in the received receiver data. The control device 1 extracts the portable device ID data and the sheet ID data from the received receiver reception data based on the transmission timing information defined by the communication protocol described above, and performs processing. Do. Therefore, the control device 1 also functions as a control unit in the claims.

  On the other hand, if the control device 1 does not determine that the portable device ID data and the sheet ID data are superimposed and received (that is, determines that the portable device ID data has not been received), According to the standard sheet position setting information set by default, the above-described adjusting device is adjusted to adjust the sheet position of the sheet indicated by the received receiver reception data (that is, data of the sheet ID). It is assumed that standard sheet position setting information is also stored in a memory such as ROM or RAM of the control device 1.

  Here, human body communication performed through the user 2 in the seat memory system 100 will be described with reference to FIG. FIG. 6 is a schematic diagram for explaining human body communication in the present embodiment. Here, the case where the user 2 is seated on the D seat 3a will be described as an example.

  When the user carries the portable device 6, the transmitter-side communication electrode 62 of the portable device-side transmitter 61 comes into contact with the user 2. Further, when the user 2 is seated on the D-sheet 3a and grasps the handle, the transmitter-side communication electrode 53a of the D-sheet transmitter 5a and the receiver-side communication electrode 71 of the handle receiver 7 come into contact with the user 2. . Therefore, when the user 2 carrying the portable device 6 is seated on the D sheet 3a, human body communication between the portable device side transmitter 61 and the handle receiver 7 via the user 2 becomes possible, and the D sheet is provided. Human body communication via the user 2 between the transmitter 5a and the handle receiver 7 becomes possible. Further, when human body communication is established between the D sheet transmitter 5 a and the handle receiver 7, a trigger signal is transmitted from the D sheet transmitter 5 a to the portable device side transmitter 61 of the portable device 6. Subsequently, the portable device-side transmitter 61 transmits the data of the portable device ID based on the trigger signal at the transmission timing according to the communication protocol described above, and the D sheet transmitter 5a also uses the trigger signal as a reference. The sheet ID data is transmitted at the transmission timing according to the communication protocol described above. Then, the sheet ID data transmitted from the D sheet transmitter 5 a and the portable device ID data transmitted from the portable device side transmitter 61 are superimposed and received by the handle receiver 7.

  On the other hand, when the user 2 who does not carry the portable device 6 sits on the D seat 3a, human body communication via the user 2 between the D seat transmitter 5a and the handle receiver 7 becomes possible. When human body communication is established between the D sheet transmitter 5a and the handle receiver 7, a trigger signal is transmitted from the D sheet transmitter 5a. Since it does not exist, the portable device ID data is not transmitted from the portable device-side transmitter 61. Accordingly, in this case, the sheet ID data is transmitted only from the D sheet transmitter 5a at the transmission timing according to the communication protocol described above. Then, the sheet ID data transmitted from the D sheet transmitter 5 a is received by the handle receiver 7.

  Since the data of the seat ID is transmitted when the user 2 is seated on the seat, the seat ID can be said to be information indicating that the user 2 is seated on the seat.

  Next, an outline of an operation flow in the sheet memory system 100 will be described with reference to FIG. FIG. 7 is a flowchart showing an operation flow in the sheet memory system 100. This flow is started when the user 2 sits on the D seat 3a and grasps the handle. Further, in the present embodiment, when the user 2 opens the door of the D seat, the control device 1 is included in the adjustment device described above so that the seat position of the D seat 3a is pulled to the maximum on the rear side of the vehicle, for example. It shall be adjusted by giving instructions. The detection of the opening of the D-seat door may be performed based on, for example, a signal from a door sensor that detects the open / closed state of the door or a door lock sensor that detects the locked / unlocked state of the door. .

  First, in step S1, when a human body communication is established between the D sheet transmitter 5a and the handle receiver 7, a trigger signal is transmitted from the D sheet transmitter 5a. When the user 2 is carrying the portable device 6, the portable device side transmitter 61 and the D sheet transmitter 5 a receive the portable device ID data and the sheet at the respective transmission timings according to the communication protocol described above. ID data is transmitted. When the user 2 is not carrying the portable device 6, the D sheet transmitter 5 a transmits the sheet ID data at the transmission timing according to the communication protocol described above.

  Subsequently, in step S2, the handle receiver 7 receives the portable device ID data and the sheet ID data, or the sheet ID data (that is, receives the data at the receiver), and receives the received receiver. The data is sent to the control device 1 and the process proceeds to step S3.

  In step S <b> 3, based on the receiver reception data sent from the handle receiver 7, the control device 1 determines whether the receiver reception data includes portable device ID data. And when it determines with the data of portable apparatus ID being contained in receiver receiving data (it is Yes at step S3), it moves to step S4. If it is not determined that the mobile device ID data is included in the receiver reception data (No in step S3), the process proceeds to step S5.

  In step S4, the control device 1 obtains sheet position setting information corresponding to the portable device ID from the memory of the control device 1 based on the portable device ID data in the receiver reception data. Then, according to the obtained sheet position setting information, the adjustment of the sheet position (hereinafter referred to as ID pattern sheet position change) of the sheet (D sheet 3a in the example of this flow) indicated by the sheet ID data in the receiver reception data. Is called) by the adjusting device described above, and the flow is terminated.

  In step S5, the control device 1 displays the sheet indicated by the receiver reception data (that is, the sheet ID data) according to the standard sheet position setting information set by default (D sheet 3a in the example of this flow). The adjustment of the sheet position (hereinafter referred to as standard pattern sheet position change) is performed by the adjustment device described above, and the flow ends.

  According to the above configuration, the portable device sent via the body of the user 2 from the portable device-side transmitter 61 of the portable device 6 carried by the user 2 and the D-sheet transmitter 5a of the D-sheet 3a of the vehicle. When the ID data and the seat ID data are superimposed and received by the handle receiver 7, the seat position of the D seat 3a seated by the user 2 is adjusted according to the seat position setting information corresponding to the portable device ID. Therefore, the human body communication can be applied to a system that adjusts the seat position according to the user 2 seated on the D seat 3a. Therefore, the applicability of human body communication can be further enhanced by the above configuration.

  Further, according to the above configuration, the seat ID data is transmitted to the handle receiver 7 by human body communication after the user 2 is seated on the D seat 3a, and the data of the portable device ID is transmitted in a superimposed manner. Communication start timing is determined, and communication time delay can be suppressed. Therefore, the seat position can be adjusted in a timely manner.

  In the present embodiment, the configuration in which the data of the sheet ID, which is an identifier unique to the D sheet 3a, is transmitted from the D sheet transmitter 5a is not necessarily limited thereto. For example, instead of the sheet ID data, data indicating that the user 2 has detected the seating may be transmitted from the D sheet transmitter 5a.

  In the present embodiment, the configuration in which the seat position is adjusted based on the receiver reception data obtained by the human body communication is shown, but the present invention is not necessarily limited thereto. For example, based on receiver reception data obtained by human body communication, seat position such as control of in-vehicle equipment related to in-vehicle environment such as adjustment of air volume and temperature of car air conditioner, adjustment of volume and sound quality of car stereo, etc. It may be configured to perform control other than the adjustment. Below, the structure which controls a car air conditioner based on the receiver receiving data obtained by human body communication is demonstrated as an example using FIG. FIG. 8 is a diagram showing a schematic configuration of the device setting memory system 100a. For convenience of explanation, members having the same functions as those shown in the drawings used in the description of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The device setting memory system 100a shown in FIG. 8 includes a control device 1a, a D sheet transmitter 5a, a P sheet transmitter 5b, a DR sheet transmitter 5c, a PR sheet transmitter 5d, a portable device 6, and a D seat floor receiver 8a. , P seat floor receiver 8b, DR seat floor receiver 8c, PR seat floor receiver 8d, and car air conditioner 9. The portable device 6 includes a portable device-side transmitter 61. Control device 1a, D sheet transmitter 5a, P sheet transmitter 5b, DR sheet transmitter 5c, PR sheet transmitter 5d, D seat floor receiver 8a, P seat floor receiver 8b, DR seat floor It is assumed that the receiver 8c, the PR seat floor receiver 8d, and the car air conditioner 9 are installed in the vehicle.

  The P sheet transmitter 5b, the DR sheet transmitter 5c, and the PR sheet transmitter 5d are the same transmitters as the D sheet transmitter 5a except that they are provided in different places. Specifically, the P seat transmitter 5b is provided in the passenger seat (P seat), and the transmitter-side communication electrode 53b of the P seat transmitter 5b is when the user 2 is seated on the P seat 3b. The P sheet 3b is provided so as to be in contact with the user 2 via an insulator. The DR seat transmitter 5c is provided in the rear seat (DR seat) of the driver seat, and the transmitter-side communication electrode 53c of the DR seat transmitter 5c is when the user 2 is seated on the DR seat 3c. The DR sheet 3c is provided so as to be in contact with the user 2 via an insulator. The PR sheet transmitter 5d is provided in the passenger seat rear seat (PR seat), and the transmitter-side communication electrode 53d of the PR sheet transmitter 5d is when the user 2 is seated on the PR seat 3d. The PR sheet 3d is provided so as to be in contact with the user 2 via an insulator.

  The D-seat floor receiver 8a is a member for receiving data transmitted from the D-sheet transmitter 5a and the portable device-side transmitter 61 of the portable device 6 via the user 2 through human body communication. A receiver-side communication electrode 71, a receiver-side receiver circuit, and a receiver-side microcomputer having the same functions as those of the receiver-side communication electrode 71, the receiver-side receiver circuit 72, and the receiver-side microcomputer 73 are provided. However, in the handle receiver 7, the receiver-side communication electrode 71 is provided on the handle, whereas the receiver-side communication electrode of the D seat floor receiver 8 a is seated on the D seat 3 a by the user 2. It is provided on the floor surface 4 (see FIG. 6) of the D seat so that it can contact the user 2 through an insulator.

  The P seat floor receiver 8b, the DR seat floor receiver 8c, and the PR seat floor receiver 8d are the same receivers as the D seat floor receiver 8a. However, the receiver-side communication electrode of the P-seat floor receiver 8b is placed on the floor 4 of the P-seat so that the user 2 can contact the user 2 via an insulator when the user 2 is seated on the P-seat 3b. It is provided. In addition, the receiver-side communication electrode of the DR seat floor receiver 8c is provided on the floor surface 4 of the DR seat so that the user 2 can contact the user 2 through an insulator when the user 2 is seated on the DR seat 3c. It is provided. The receiver-side communication electrode of the PR seat floor receiver 8d is placed on the floor surface 4 of the PR seat so that the user 2 can contact the user 2 via an insulator when the user 2 is seated on the PR seat 3d. It is provided.

  Therefore, the D sheet transmitter 5a, the P sheet transmitter 5b, the DR sheet transmitter 5c, and the PR sheet transmitter 5d function as a transmitter of claims, and the D seat floor receiver 8a and the P seat floor receiver 8b, the DR seat floor receiver 8c, and the PR seat floor receiver 8d function as a receiver of the claims.

  The car air conditioner 9 includes an air conditioner ECU, and the temperature and the amount of air blown out for each seat of the vehicle can be changed by the control of the air conditioner ECU.

  Instead of storing the portable device ID and the seat position setting information in association with each other in advance, the control device 1a stores information on the setting values of the portable device ID and the temperature and air volume of the car air conditioner 9 (hereinafter referred to as air conditioner setting information and Is different from the control device 1 in that it is stored in association with each other in advance. The control device 1a is different from the control device 1 in that the control target is the air conditioner ECU of the car air conditioner 9 instead of the adjustment device described above. The control device 1a has the same function as the control device 1 except for these differences.

  Here, control of the air conditioner ECU of the car air conditioner 9 by the control device 1a will be described. When the control device 1a determines that the portable device ID data and the sheet ID data are received in a superimposed manner, the control device 1a is based on the portable device ID data in the received receiver data. The air conditioner setting information corresponding to the portable device ID is obtained from the memory. Then, according to the obtained air conditioner setting information, the car air conditioner 9 toward the seat indicated by the seat ID data in the received receiver reception data (that is, toward the user 2 seated on the seat). The air conditioner ECU adjusts the temperature and air volume.

  On the other hand, if the control device 1a does not determine that the data of the portable device ID and the data of the sheet ID are superimposed and received (that is, if it is determined that the data of the portable device ID is not received), In accordance with the standard air conditioner setting information set by default, the air conditioner ECU adjusts the temperature and the air volume of the car air conditioner 9 toward the seat indicated by the received receiver reception data (that is, the data of the seat ID). It is assumed that the standard air conditioner setting information is also stored in a memory such as ROM or RAM of the control device 1a.

According to the above configuration, portable device ID data and sheet sent from the portable device 6 transmitter 61 of the portable device 6 carried by the user 2 and the vehicle seat transmitter through the body of the user 2. When the ID data is superimposed and received by the floor receiver, the temperature and air volume of the car air conditioner 9 can be adjusted in accordance with the air conditioner setting information corresponding to the portable device ID, so that the seated seat The human body communication can be applied to a system that adjusts the temperature and air volume of the car air conditioner according to the user 2. Therefore, according to the above configuration, the applicability of human body communication can be further enhanced. Moreover, according to the above structure, it becomes possible to adjust the setting of the car air conditioner 9 to the setting suitable for the user 2 only toward the seat on which the user 2 carrying the portable device 6 is seated.

  Moreover, in this embodiment, although the structure which controls the apparatus mounted in a vehicle based on the receiver reception data obtained by human body communication was shown, it does not necessarily restrict to this. For example, the receiver reception data obtained by communication (hereinafter referred to as human body communication-like communication) performed via a predetermined communication medium instead of the human body in the human body communication (the body of the user 2 in the example of the above-described embodiment) Based on this, it may be configured to search in which seat in the vehicle the electronic key carried by the user 2 exists and display the search result. The predetermined communication medium here will be described in detail later. Below, based on the receiver reception data obtained by human body communication-like communication, it is a figure about the structure which searches the electronic key carried by the user 2 near which seat in a vehicle, and displays a search result 9 is used for explanation. FIG. 9 is a diagram showing a schematic configuration of the smart key search system 100b. For convenience of explanation, members having the same functions as those shown in the drawings used in the description of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The smart key search system 100b shown in FIG. 9 includes a control device 1b, a D sheet transmitter 5a, a P sheet transmitter 5b, a DR sheet transmitter 5c, a PR sheet transmitter 5d, an electronic key 6a, and a D seat floor receiver 8a. , A P seat floor receiver 8b, a DR seat floor receiver 8c, a PR seat floor receiver 8d, and a display device 10. The electronic key 6 a includes a portable device-side transmitter 61. Control device 1b, D sheet transmitter 5a, P sheet transmitter 5b, DR sheet transmitter 5c, PR sheet transmitter 5d, D seat floor receiver 8a, P seat floor receiver 8b, DR seat floor The receiver 8c, the PR seat floor receiver 8d, and the display device 10 are assumed to be installed in the vehicle.

  The electronic key 6a is the same as the electronic key of the well-known smart key system except that it includes a portable device-side transmitter 61. The electronic key 6a wirelessly locks and unlocks the door of the vehicle. A well-known wireless switch (not shown) is provided.

  In the smart key search system 100b shown in FIG. 9, a D sheet transmitter 5a, a P sheet transmitter 5b, a DR sheet transmitter 5c, a PR sheet transmitter 5d, a D seat floor receiver 8a, and a P seat floor receiver. 8b, communication between the DR seat floor receiver 8c and the PR seat floor receiver 8d is not via the user 2, but as a predetermined communication medium, for example via the floor and seat of the vehicle seat Do. Further, between the portable device-side transmitter 61 of the electronic key 6a and the D seat floor receiver 8a, the P seat floor receiver 8b, the DR seat floor receiver 8c, and the PR seat floor receiver 8d. Communication is also performed not via the user 2 but via a floor and a seat of a vehicle seat as a predetermined communication medium, for example. Thus, the seat and floor of the vehicle function as the conductor communication medium of the claims. The predetermined communication medium may be composed of a conductor, may be composed of a dielectric having a conductor inside or inside, or may be composed of both. Good.

  The display device 10 displays an image according to the display data sent from the control device 1b. Therefore, the display device 10 functions as a presenting unit of claims. The display device 10 is capable of full color display, for example, and can be configured using a liquid crystal display, an organic EL display, a plasma display, or the like. Further, a display device of an in-vehicle navigation device can be used as the display device 10.

  The control device 1b is configured as a normal computer, and includes a well-known CPU, ROM, RAM, I / O, and a bus line (all not shown) for connecting these configurations. .

  The control device 1b receives receiver reception data from the D seat floor receiver 8a, the P seat floor receiver 8b, the DR seat floor receiver 8c, and the PR seat floor receiver 8d. In addition, based on the reception data of the receiver, it is individually determined whether or not the receiver ID data and the sheet ID data are superposed and received by these receivers. This determination is performed according to whether or not portable device ID data exists in an empty portion of the transmission timing of the sheet ID data defined in the above communication protocol. Therefore, the control device 1b also functions as a determination unit.

  Furthermore, the control device 1b includes the receiver reception data sent from the D seat floor receiver 8a, the P seat floor receiver 8b, the DR seat floor receiver 8c, and the PR seat floor receiver 8d. For any of the above, when it is determined that the portable device ID data and the sheet ID data are superimposed and received, the sheet ID data included in the receiver reception data determined to be superimposed and received is obtained. Then, assuming that the electronic key 6a is present near the seat where the seat indicated by the seat ID is installed, display data for displaying information indicating the seat location on the display device 10 is created. Display on the display device 10. Note that the control device 1b extracts the data of the portable device ID and the data of the sheet ID from the received data received from the receiver based on the transmission timing information defined by the communication protocol described above, and performs processing. Do. Therefore, the control device 1b also functions as a control unit in the claims. Since the seat where the seat is installed can be specified by the seat ID, the seat ID can be said to be an identifier unique to the seat.

  On the other hand, the control device 1b includes the receiver reception data transmitted from the D seat floor receiver 8a, the P seat floor receiver 8b, the DR seat floor receiver 8c, and the PR seat floor receiver 8d. In any case, when it is not determined that the portable device ID data and the sheet ID data are superimposed and received (that is, when it is determined that the portable device ID data is not received), the electronic key is used. Assuming that 6a does not exist, display data for displaying on the display device 10 information indicating that the electronic key 6a does not exist in the vehicle is created and displayed on the display device 10.

  Here, taking as an example the case where the electronic key 6a is in the D seat, communication between the D sheet transmitter 5a and the portable device side transmitter 61 and the D seat floor receiver 8a will be described. .

  For example, when the user 2 inputs an instruction to start searching for a place where the electronic key 6a is present via an operation switch (not shown), a trigger signal is sent from the control device 1b to the D sheet transmitter 5a. The D sheet transmitter 5a that has received this trigger signal causes the trigger signal to be transmitted to the portable device side transmitter 61 of the electronic key 6a via at least one of the D sheet 3a and the floor of the D seat. . Specifically, when the electronic key 6a is dropped on the D sheet 3a, a trigger signal is transmitted via the D sheet 3a, and when the electronic key 6a is dropped on the floor of the D seat, A trigger signal is transmitted through the D seat 3a and the floor of the D seat. Further, the D sheet transmitter 5a sends the data of the sheet ID of the D sheet 3a to the D seat floor receiver 8a via the D sheet 3a and the floor of the D seat at a predetermined transmission timing (that is, a predetermined sheet). It is transmitted at a predetermined timing after the time. It is assumed that the predetermined transmission timing here is determined in advance by the same communication protocol as described above.

  Further, when the portable device-side transmitter 61 of the electronic key 6a receives a trigger signal from the D-sheet transmitter 5a, the portable device ID of the electronic key 6a is passed through at least one of the D-sheet 3a and the floor of the D-seat. Is transmitted to the D seat floor receiver 8a at a predetermined transmission timing. Specifically, when the electronic key 6a falls on the D sheet 3a, the portable device ID data is transmitted through the D sheet 3a and the floor of the D seat, and the electronic key 6a is transmitted to the floor of the D seat. If the mobile device ID falls, the portable device ID data is transmitted through the floor of the D seat. It is assumed that the predetermined transmission timing here is determined in advance by the same communication protocol as described above. In the D seat floor receiver 8a, the sheet ID data transmitted from the D sheet transmitter 5a and the portable device ID data transmitted from the portable device side transmitter 61 of the electronic key 6a are superimposed and received. To do.

  Next, an outline of an operation flow in the smart key search system 100b will be described with reference to FIG. FIG. 10 is a flowchart showing an operation flow in the smart key search system 100b. This flow is started when the ignition switch of the vehicle is turned on.

  First, in step S11, trigger signals are individually transmitted from the D sheet transmitter 5a, the P sheet transmitter 5b, the DR sheet transmitter 5c, and the PR sheet transmitter 5d. If the electronic key 6a is present in any of the D seat, P seat, DR seat, and PR seat, the portable device-side transmitter 61, the D sheet transmitter 5a, the P seat transmitter 5b, The DR sheet transmitter 5c and the PR sheet transmitter 5d transmit portable device ID data and sheet ID data at respective transmission timings in accordance with the communication protocol described above. When the electronic key 6a is not present in any of the D seat, P seat, DR seat, and PR seat, the D sheet transmitter 5a, the P sheet transmitter 5b, the DR sheet transmitter 5c, and The PR sheet transmitter 5d transmits the sheet ID data at the transmission timing according to the communication protocol described above.

  Subsequently, in step S12, the portable device ID data and the sheet ID data, or the sheet ID data are transferred to the D seat floor receiver 8a, the P seat floor receiver 8b, the DR seat floor receiver 8c, and the PR. The floor / floor receiver 8d receives (that is, data is received by the floor receiver), and the receiver reception data obtained by this reception is sent to the control device 1b, and the process proceeds to step S13.

  In step S13, based on the receiver reception data sent from the floor receiver, the control device 1b determines whether or not the receiver reception data includes portable device ID data. And when it determines with the data of portable apparatus ID being contained in the receiver reception data in any one of the receiver reception data sent from the floor receiver (Yes in step S13), step Move on to S14. If it is determined that none of the receiver reception data sent from the floor receiver contains portable device ID data (No in step S13), the process proceeds to step S15.

  In step S14, the control device 1b obtains the sheet ID data included in the determined receiver reception data including the portable device ID data. Then, information indicating the location of the seat where the seat indicated by the seat ID is installed (hereinafter referred to as location information with ID) is displayed on the display device 10, and the flow ends.

  In step S15, the control device 1b causes the display device 10 to display information indicating that the electronic key 6a does not exist in the vehicle (hereinafter referred to as “keyless information”), and the flow ends.

  In the conventional smart key system, it was not possible to specify where the electronic key exists in the vehicle interior. However, according to the above configuration, it is possible to specify the seat near the electronic key 6a in the vehicle interior. Then, the information on the seat where the electronic key 6a exists can be displayed on the display device 10.

  In addition, in this embodiment, although the structure which uses the display apparatus 10 as a presentation part of a claim was shown, it does not necessarily restrict to this. For example, the structure which uses audio | voice output apparatuses, such as a speaker, as a presentation part of a claim may be sufficient. In this case, the control device 1b may be configured to generate voice output data for outputting the above-described location information with ID and keyless information by the voice output device and outputting the data by the voice output device.

  In the above-described embodiment, an example in which the present invention is applied to a four-seat vehicle is shown, but the present invention is not necessarily limited thereto. For example, the present invention may be applied to a vehicle having fewer seats than four seats, or may be applied to a vehicle having more seats than four seats. In this case as well, the configuration may be such that a floor receiver and a seat transmitter are provided for each seat.

  Furthermore, in the above-mentioned embodiment, although the structure provided with a floor receiver for every seat was shown, it does not necessarily restrict to this. For example, the structure which equips only a part of seat with a floor receiver may be sufficient. Moreover, it is good also as a structure which provides the electrode for human body communication in a floor surface receiver for every seat, and does not provide the receiver side receiving circuit and receiver side microcomputer in a floor surface receiver for every seat.

  Moreover, the structure which is the electronic key similar to the electronic key 6a may be sufficient as the portable device 6 in the above-mentioned embodiment.

  In the above-described embodiment, as illustrated in FIG. 5, the configuration in which the transmission protocol of the portable device ID data is overlapped with the empty portion of the transmission timing of the sheet ID data is defined by the communication protocol. Not limited to this. For example, the configuration may be such that the transmission timing of the sheet ID data and the transmission timing of the portable device ID data are determined by a communication protocol so that the portable device ID data starts after the end of the sheet ID data. Even in this case, the peak of the waveform of the pulse signal of the portable device ID data and the sheet ID data when the sheet ID data and the portable device ID data are superimposed does not overlap each other.

  In the above-described embodiment, the data signal transmitted / received by human body communication is a pulse signal represented by a rectangular wave. However, the present invention is not limited to this. For example, the data signal transmitted and received by human body communication may be either an analog signal or a digital signal, or may be a signal obtained by modulating these data.

  Further, in the above-described embodiment, the configuration is shown in which the peaks of the waveform of the pulse signal of the portable device ID data and the sheet ID data do not overlap each other, but this is not necessarily limited thereto. For example, in a system that uses the portable device ID data only for the purpose of detecting whether or not the received device data includes the portable device ID data, such as the smart key search system 100b, The configuration may be such that the peaks of the waveform of the pulse signal of the data and the sheet ID data overlap each other. In this case, when the portable device ID data is crushed by superimposing the sheet ID data and the portable device ID data, the transmission timing of the portable device ID data is set based on the transmission timing determined in the communication protocol. What is necessary is just to make it the structure which determines the presence or absence of the data of portable machine ID according to whether there exists any data in applicable timing. Specifically, the waveform of the portable device ID data and the sheet ID data signal is stored in advance, and the waveform of the data signal received by the floor receiver is compared with the waveform of the stored data signal. Then, if they do not coincide with each other, it is determined that the peaks of the waveform of the data signal overlap, and it is determined that the portable receiver ID data and the sheet ID data are received by the floor receiver in a superimposed manner. What is necessary is just to be the structure to do.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of the present invention.

1 is a diagram showing a schematic configuration of a sheet memory system 100. FIG. It is a block diagram which shows the schematic structure of D sheet transmitter 5a. 3 is a block diagram showing a schematic configuration of a handle receiver 7. FIG. 3 is a block diagram illustrating a schematic configuration of a portable device-side transmitter 61. FIG. It is a figure which shows an example of the receiver ID data which superimposed the data of sheet | seat ID of D sheet | seat 3a, the data of portable machine ID of the portable device 6, and these ID data. It is a schematic diagram for demonstrating the human body communication in this embodiment. 4 is a flowchart showing an operation flow in the sheet memory system 100. It is a figure which shows the schematic structure of the apparatus setting memory system 100a. It is a figure which shows schematic structure of the smart key search system 100b. It is a flowchart which shows the operation | movement flow in the smart key search system 100b.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control apparatus (determination part, control part, setting information storage memory), 1a / 1b Control apparatus (determination part, control part), 2 users, 3a D sheet (unit, fixed unit), 3b P sheet (unit, fixed unit) ), 3c DR sheet (unit, fixed unit), 3d PR sheet (unit, fixed unit), 4 floor, 5a D sheet transmitter (transmitter), 5b P sheet transmitter (transmitter), 5c DR sheet transmission Machine (transmission unit), 5d PR sheet transmitter (transmission unit), 6 portable device (unit, communication device), 6a electronic key (unit, communication device, portable unit), 7 handle receiver (reception unit), 8a D Seat floor receiver (receiver), 8b P seat floor receiver (receiver), 8c DR seat floor receiver (receiver), 8d PR seat floor receiver (receiver), 9 car air conditioner, DESCRIPTION OF SYMBOLS 10 Display apparatus (presentation part), 51a-51d Transmitter side microcomputer, 52a-52d Transmitter side transmission circuit, 53a-53d Transmitter side communication electrode, 61 Portable machine side transmitter (transmission part), 62 Transmitter side Electrode for communication, 63 Transmitter side receiver circuit, 64 Transmitter side microcomputer, 65 Transmitter side transmitter circuit, 71 Receiver electrode for communication, 72 Receiver side receiver circuit, 73 Receiver side microcomputer, 100 Sheet memory system ( Communication system), 100a in-vehicle device setting memory system (communication system), 100b smart key search system (communication system),

Claims (7)

A communication device carried by a user is a communication system that performs communication using the user's body or a predetermined conductor communication medium as a transmission path,
A plurality of units including the communication device, including a transmission unit capable of transmitting data via the user's body or a predetermined conductor communication medium;
A receiving unit that receives data transmitted from the transmitting unit of one or more of the units via the user's body or the predetermined conductor communication medium;
A determination unit for determining whether or not a plurality of types of data are received by the reception unit;
And a control unit that performs control according to a determination result in the determination unit.   The transmission units of the plurality of units control the timing so that the waveform peaks of the respective data do not overlap each other even when the plurality of types of data transmitted from the respective transmission units are superimposed. The communication system according to claim 1, wherein the plurality of types of data are transmitted.   The determination unit stores the waveform of the data signal of the plurality of units in advance, and compares the waveform of the data signal received by the reception unit with the waveform of the stored data signal. 2, when it does not match, it is determined that the peaks of the waveform of the data signal overlap, and the reception unit determines that a plurality of types of data have been received in a superimposed manner. Communications system. The plurality of units include the communication device and a vehicle seat,
A setting information storage memory that stores an identifier for identifying the user and setting information of the sheet position of the sheet in association with each other;
The seat transmission unit transmits seating data, which is data indicating that the user is seated on the seat after the user is seated on the seat, through the user's body,
The transmission unit of the communication device transmits user identifier data, which is data indicating an identifier for identifying a user carrying the communication device, superimposed on the transmission of the seating data through the user's body,
When the determination unit determines that the user identifier data and the seating data are superimposed and received by the reception unit, the control unit, from the setting information storage memory, based on the user identifier data 3. The communication system according to claim 1, wherein the sheet position setting information corresponding to the identifier indicated by the user identifier data is obtained, and the sheet position of the sheet is adjusted according to the sheet position setting information. .   The communication system according to any one of claims 1 to 4, wherein the communication device is an electronic key of a vehicle. As the plurality of units, including a carrying unit carried by a user and a plurality of fixed units respectively arranged in a predetermined part of the vehicle,
The conductor communication medium is arranged for each of the plurality of fixed units,
From the transmission unit for each of the plurality of fixed units, it transmits fixed unit identifier data that is data indicating an identifier for identifying the fixed unit via the conductor communication medium,
From the carrying unit, transmit carrying unit identifier data which is data indicating an identifier for identifying the carrying unit via the conductor communication medium,
The control unit has the fixed unit identifier data and the portable unit identifier data when the determination unit determines that the fixed unit identifier data and the portable unit identifier data are received by the receiving unit in a superimposed manner. The communication system according to any one of claims 1 to 3, wherein control is performed to identify in which fixed unit the portable unit is present. The plurality of units include an electronic key of a vehicle carried by a user and each seat of the vehicle,
A presentation unit for presenting information;
The conductor communication medium is arranged for each seat of the vehicle,
From the transmission unit for each seat, seat identifier data that is data indicating an identifier for identifying the seat via the conductor communication medium is transmitted,
The electronic key transmits key identifier data that is data indicating an identifier for identifying the electronic key via the conductor communication medium,
When the determination unit determines that the reception unit superimposes and receives the seat identifier data and the key identifier data, the control unit determines which one based on the seat identifier data and the key identifier data. The communication system according to any one of claims 1 to 3, further comprising: detecting whether the electronic key is present in a seat and causing the presenting unit to present the detection result.

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