JP6340773B2 - Wearing terminal device, contact terminal device, and human body communication system - Google Patents

Description

  The technology of the present disclosure relates to a wearing terminal device, a contact terminal device, and a human body communication system that perform human body communication using a human body as a route.

  Human body communication using a human body as a communication path is being used for wireless communication at a short distance. For example, as described in Patent Document 1, in human body communication, only the surface of the human body or only the inside of the human body is used as a communication path, so that signals used for human body communication are unlikely to leak around the communication terminal device.

JP 2013-102374 A

  By the way, as a terminal device for exchanging signals using human body communication, for example, a wearable device such as a wristwatch type terminal device or a bandage type terminal device has been proposed. Wearable devices worn by users are usually small enough that they do not interfere with user movement, and therefore the capacity of the power supply installed in wearable devices is also frequently changed and charged to users. Small enough to force. For these reasons, a terminal device attached to a user is required to have a lower frequency of power supply replacement and a lower frequency of power supply maintenance.

These items are not limited to the terminal device worn by the user, but are commonly required for other terminal devices that perform human body communication with the wearing terminal device.
An object of the technology of the present disclosure is to provide a mounting terminal device, a contact terminal device, and a human body communication system that can reduce the frequency of power supply maintenance.

  One aspect of the wearing terminal device according to the technology of the present disclosure includes: a wearing unit worn by a user; a contact terminal device that contacts the user; a communication unit that performs human body communication using the user as a route; and the contact terminal device A storage unit that stores authentication information used for authentication of the user; a communication control unit that controls the human body communication by the communication unit and transmits the authentication information to the contact terminal device through the human body communication; and the human body communication And an environmental power generation unit that generates power using at least a part of the power used in the environment.

  One aspect of the contact terminal device according to the technology of the present disclosure includes a contact unit that contacts a user, a mounting terminal device worn by the user, a communication unit that performs human body communication using the user as a route, and the human body by the communication unit. A communication control unit that controls communication to receive authentication information transmitted by the wearing terminal device, an authentication unit that performs authentication using the received authentication information, and at least one of power used for the human body communication An energy generating unit that generates power from energy in the environment.

  One aspect of the human body communication system according to the technology of the present disclosure includes a wearing terminal device worn by a user and a contact terminal device contacting the user. The wearing terminal device includes a wearing communication unit that performs human body communication with the contact terminal device as a route, a wearing storage unit that stores authentication information used by the contact terminal device for authentication of the user, and the wearing communication. A wearing communication control unit that controls the human body communication by a unit and transmits the authentication information to the contact terminal device through the human body communication. The contact terminal device includes a contact communication unit that performs human body communication with the wearing terminal device as a route, a contact communication control unit that controls the human body communication by the contact communication unit and receives the authentication information. A contact authentication unit that performs authentication using the received authentication information. At least one of the wearing terminal device and the contact terminal device includes an environmental power generation unit that generates at least a part of electric power used for the human body communication from energy in the environment.

  According to the above-described aspect of the technology of the present disclosure, the environmental power generation unit generates at least a part of power necessary for human body communication. Therefore, compared with the structure which is not provided with the energy harvesting part, the electric power required for power supplies other than the energy harvesting part can be reduced. Therefore, it is possible to lengthen the period from the replacement of the power supply to the next replacement of the power supply, or to increase the period from the charging of the power supply to the next charging of the power supply, or the energy harvesting unit Depending on the amount of power generated, the power supply can be eliminated. As a result, the frequency of power supply maintenance can be reduced.

  In another aspect of the human body communication system according to the technology of the present disclosure, the wearing communication control unit causes the wearing communication unit to transmit the authentication information to the contact terminal device every predetermined time, and the contact authentication unit includes: Each time the contact communication unit receives the authentication information, authentication is performed using the received authentication information.

  According to another aspect of the human body communication system according to the technique of the present disclosure, authentication of the wearing terminal device in the contact terminal device is repeatedly performed. Therefore, it is possible to reduce the possibility that a third party other than the user wearing the wearing terminal device operates the contact terminal device, compared to a configuration in which the wearing terminal device is authenticated only once in the contact terminal device. .

  In another aspect of the human body communication system according to the technology of the present disclosure, the wearing terminal device further includes a wearing authentication unit that performs authentication of the contact terminal device, and the contact terminal device uses authentication for authentication of the contact terminal device. A contact storage unit that stores information; and the contact communication control unit controls the human body communication by the wearing communication unit to transmit authentication information of the contact storage unit to the wearing terminal device through the human body communication. The wearing communication control unit controls the human body communication by the wearing communication unit to receive authentication information of the contact storage unit, and the wearing authentication unit receives the received authentication information of the contact storage unit. Use to authenticate.

  According to the other aspect of the human body communication system in the technology of the present disclosure, both authentication of the wearing terminal device in the contact terminal device and authentication of the contact terminal device in the wearing terminal device are performed. Therefore, compared with a configuration in which only the authentication of the wearing terminal device is performed in the contact terminal device, the wearing terminal device can avoid communicating with a communication terminal device different from the original. Therefore, the safety of human body communication between the wearing terminal device and the contact terminal device is further increased.

In another aspect of the human body communication system according to the technique of the present disclosure, the wearing terminal device and the contact terminal device perform the human body communication by causing a current to flow inside the user's body.
According to another aspect of the human body communication system according to the technology of the present disclosure, human body communication between the wearing terminal device and the contact terminal device uses the current flowing inside the user's body, and thus is exchanged by human body communication. Information is less likely to be received by a communication terminal device other than the two terminal devices. Therefore, the safety of human body communication between the wearing terminal device and the contact terminal device is enhanced.

  In another aspect of the human body communication system according to the technology of the present disclosure, a bicycle includes the contact terminal device, the environmental power generation unit of the contact terminal device includes a piezoelectric element, and the piezoelectric element is inside the pedal of the bicycle. Located in.

  According to another aspect of the human body communication system in the technology of the present disclosure, the piezoelectric element generates power each time the user steps on the bicycle pedal. In addition, while the bicycle is running, the piezoelectric element generates power by receiving vibration from the bicycle. Therefore, most of the electric power necessary for human body communication by the contact terminal device is easily generated by the piezoelectric element. Therefore, the number of operations required for maintaining the power source of the contact terminal device can be further reduced.

  According to the mounting terminal device, the contact terminal device, and the human body communication system in the technology of the present disclosure, the frequency of power supply maintenance can be reduced.

It is a block diagram which shows the whole structure of the human body communication system in 1st Embodiment of the human body communication system of this indication. It is a block diagram which shows the structure of the mounting terminal device in 1st Embodiment, and the structure of a contact terminal device. 1 is a configuration diagram illustrating an overall configuration of a human body communication system according to a first embodiment. It is a sequence chart which shows the procedure of the process of the communication which the mounting terminal device and contact terminal device in Example 1 perform. It is a sequence chart which shows the procedure of the process of the communication which the mounting terminal device and contact terminal device in the modification of 1st Embodiment perform. It is a sequence chart which shows the procedure of the process of the communication which the mounting terminal device and contact terminal device in the modification of 1st Embodiment perform. It is a block diagram which shows the structure of the mounting | wearing terminal device in 2nd Embodiment of the human body communication system of this indication, and the structure of a contact terminal device. It is a block diagram which shows the whole structure of the human body communication system in Example 2. FIG. It is a sequence chart which shows the procedure of the process of the communication which the mounting terminal device and contact terminal device in Example 2 perform. It is a sequence chart which shows the procedure of the process of the communication which the mounting terminal device and contact terminal device in the modification of 2nd Embodiment perform. It is a block diagram which shows the structure of the mounting | wearing terminal device in 3rd Embodiment of the human body communication system of this indication, and the structure of a contact terminal device. It is a block diagram which shows the whole structure of the human body communication system in Example 3. It is a sequence chart which shows the procedure of the process of the communication which the mounting terminal device and contact terminal device in Example 3 perform. It is a sequence chart which shows the procedure of the process of the communication which the mounting terminal device and contact terminal device in the modification of 3rd Embodiment perform.

[First Embodiment]
With reference to FIG. 1 to FIG. 4, a first embodiment that embodies each of a wearing terminal device, a contact terminal device, and a human body communication system will be described. Below, the whole structure of a human body communication system, the structure of each terminal device, the Example of a human body communication system, and the procedure of the communication process in an Example are demonstrated in order.

[Overall configuration of human body communication system]
With reference to FIG. 1, the whole structure of a human body communication system is demonstrated.
As shown in FIG. 1, the human body communication system 10 includes an attachment terminal device 12 attached to a user 11 and a contact terminal device 13 that contacts the user 11. The wearing terminal device 12 and the contact terminal device 13 perform human body communication using the inside of the user 11 body or the surface of the user 11 body as the communication path 14.

  The mounting terminal device 12 includes a mounting unit 12 a that is mounted on the body of the user 11. It is most important that the mounting terminal device 12 is mounted on the body of the user 11 via the mounting portion 12a. The mounting terminal device 12 includes, for example, the wrist 11a, the finger 11b, the face 11c, the neck 11d, What is necessary is just to mount | wear to either the chest 11e, the ankle 11f, etc.

  The wearing terminal device 12 only needs to have a shape and size that can be worn on the body of the user 11. When the mounting terminal device 12 is mounted on the wrist 11a, the finger 11b, the neck 11d, and the ankle 11f of the user 11, the mounting portion 12a has an endless ring shape that surrounds the entire portion, It is preferable that it has the ring shape of the end which surrounds a part. When the wearing terminal device 12 is worn on the face 11c of the user 11, it is preferable that the wearing portion 12a has a shape of glasses that spans between two ears of the face 11c. When the mounting terminal device 12 is mounted on the chest 11e of the user 11, it is preferable that the mounting portion 12a has a plate shape having adhesiveness capable of being attached to and detached from the chest 11e of the user 11.

  The wearing terminal device 12 may be in direct contact with the body of the user 11 or may be worn by the user 11 via clothes or the like. In short, the user 11 is in a state where human body communication with the contact terminal device 13 is possible. It only has to be attached to.

  The contact terminal device 13 includes a contact portion 13 a that contacts the body of the user 11. In the contact terminal device 13, contact with the body of the user 11 is the most important, and any part of the body of the user 11 may be touched. The contact part 13a of the contact terminal device 13 should just contact the hand 11g of the user 11, the leg 11h, the collar part 11i, etc., for example. Alternatively, the contact part 13a is attached to any part of the body of the user 11, that is, the part to which the above-described attachment terminal apparatus 12 is attached, like the attachment part 12a of the attachment terminal apparatus 12. Thus, the contact terminal device 13 may contact the user 11.

  The contact terminal device 13 may be in direct contact with the body of the user 11 or may be in contact with the user 11 through clothes or the like. In short, the user 11 is in a state where human body communication with the wearing terminal device 12 is possible. Just touch.

  The human body communication between the wearing terminal device 12 and the contact terminal device 13 may be an electric field method using an electric field generated on the body surface of the user 11 as the communication path 14, or a current passing through the inside of the user 11 body may be used as the communication path 14. The current method used as In the human body communication based on the current method, the range in which the communication path 14 extends is smaller than in the human body communication based on the electric field method. Therefore, the human body communication based on the current method is less likely to receive a signal that the unintended communication terminal device exchanges between the wearing terminal device 12 and the contact terminal device 13 than the human body communication based on the electric field method. As a result, the safety of human body communication is increased.

Human body communication between the wearing terminal device 12 and the contact terminal device 13 is bidirectional communication, and the human body communication may be half-duplex communication or full-duplex communication among the bidirectional communications. .
The contact terminal device 13 authenticates the user 11 of the contact terminal device 13 using human body communication. That is, the contact terminal device 13 confirms whether or not the user 11 of the contact terminal device 13 is the user 11 who has authority to use the contact terminal device 13. At this time, the contact terminal device 13 is the user 11 having the authority to use the contact terminal device 13 depending on whether or not the user 11 using the contact terminal device 13 is wearing the specific wearing terminal device 12. Check whether or not.

  The wearing terminal device 12 preferably authenticates the contact terminal device 13 in contact with the user 11 using human body communication. The wearing terminal device 12 determines whether or not the contact terminal device 13 used by the user 11 is the contact terminal device 13 that the user 11 has authority to use. The configuration in which the wearing terminal device 12 authenticates the contact terminal device 13 is not the same as the configuration in which the contact terminal device 13 only authenticates the user 11 wearing the wearing terminal device 12. Communicate with different contact terminal devices. Therefore, the safety of human body communication between the wearing terminal device 12 and the contact terminal device 13 is further increased.

[Configuration of each terminal device]
With reference to FIG. 2, the configuration of the wearing terminal device and the configuration of the contact terminal device will be described.
As shown in FIG. 2, the wearing terminal device 12 includes a wearing electrode 21, a wearing receiving unit 22 and a wearing transmitting unit 23, a wearing communication unit 24, a wearing control unit 25, a wearing storage unit 26, and a power supply unit. 27.

  The mounting electrode 21 has, for example, a plate shape, and the material for forming the mounting electrode 21 is a conductive material such as metal. The wearing electrode 21 only needs to be located in a portion of the wearing terminal device 12 where the distance between the wearing terminal device 12 and the human body wearing the wearing terminal device 12 is equal to or less than a predetermined distance, and is located on the outer surface of the wearing terminal device 12. Alternatively, it may be located inside a housing constituting the mounting terminal device 12.

  The wearing communication unit 24 includes a wearing receiver 22 that receives a signal transmitted from the contact terminal device 13 and a wearing transmitter 23 that transmits a signal toward the contact terminal device 13. The wearing receiver 22 includes a demodulation circuit, and obtains an information signal from the modulated signal by demodulating the modulated signal transmitted from the contact terminal device 13 using the carrier wave of the contact terminal device 13.

  The mounting transmission unit 23 includes a modulation circuit, and modulates a carrier wave with the information signal output from the mounting control unit 25 to generate a modulation signal. The modulation signal has a frequency of about several hundred kHz to several tens of MHz, for example. The wearing transmitter 23 generates a modulated signal having a frequency of several MHz, for example.

  The mounting control unit 25 is an example of a mounting communication control unit and a mounting authentication unit, and controls the mounting receiving unit 22 and the mounting transmitting unit 23 to receive and transmit a modulated signal. The mounting control unit 25 processes the information signal generated by the mounting receiving unit 22 to generate a signal for driving the mounting communication unit 24 and a signal for driving the mounting storage unit 26. The wearing control unit 25 preferably authenticates the contact terminal device 13 using the contact terminal ID transmitted from the contact terminal device 13 and the collation data stored in the wearing storage unit 26.

  The mounting storage unit 26 stores a mounting terminal ID that is an identifier unique to the mounting terminal device 12. The mounting terminal ID is an example of authentication information, and the mounting storage unit 26 may store authentication information in advance, or may store authentication information received by the mounting terminal device 12 through communication. The mounting storage unit 26 preferably stores verification data for performing authentication of the contact terminal device 13, for example, verification with a contact terminal ID that is an identifier unique to the contact terminal device 13. The contact terminal ID is an example of authentication information. In order to increase communication security, the wearing terminal device 12 and the contact terminal device 13 may protect the distribution of authentication information data by encryption such as AES.

  The power supply unit 27 is connected to each of the mounting control unit 25, the mounting communication unit 24, and the mounting storage unit 26, and supplies power to each of the mounting control unit 25, the mounting communication unit 24, and the mounting storage unit 26. . The power supply unit 27 may be any one of a primary battery, a secondary battery, an electric double layer capacitor, and an organic radical battery.

  The contact terminal device 13 includes a contact electrode 31, a contact communication unit 34 including a contact reception unit 32 and a contact transmission unit 33, a contact control unit 35, a contact storage unit 36, and an energy harvesting unit 37.

  Similar to the mounting electrode 21, the contact electrode 31 has, for example, a plate shape, and a material for forming the contact electrode 31 is a conductive material such as metal. The contact electrode 31 should just be located in the site | part in which the distance between the human body which contacted the contact part 13a of the contact terminal device 13 among the contact terminal devices 13 becomes below predetermined distance, and the outside of the contact part 13a. It may be located on the surface, or may be located in a part covered by a housing or the like that constitutes the contact portion 13a.

  The contact communication unit 34 includes a contact reception unit 32 that receives a signal transmitted from the wearing terminal device 12 and a contact transmission unit 33 that transmits a signal toward the wearing terminal device 12. The contact receiving unit 32 includes a demodulation circuit, like the wearing receiving unit 22, and obtains an information signal from the modulated signal by demodulating the modulation signal transmitted from the wearing terminal device 12 using the carrier wave of the wearing terminal device 12.

  The contact transmission unit 33 includes a modulation circuit, and modulates a carrier wave with the information signal output from the contact control unit 35 to generate a modulation signal. The modulation signal has, for example, a frequency of about several hundred kHz to several tens of MHz, and preferably has a frequency different from that of the modulation signal transmitted by the wearing terminal device 12. The contact transmitter 33 generates a modulated signal having a frequency of several hundred kHz, for example. According to the frequency in the modulation signal of the contact transmission unit 33, the difference in frequency between the modulation signal of the mounting transmission unit 23 and the modulation signal of the contact transmission unit 33 is so large that noise is not generated in each modulation signal. Become.

  The contact storage unit 36 stores verification data for performing authentication of the mounting terminal device 12, for example, verification with a mounting terminal ID that is an identifier unique to the mounting terminal device 12. The contact storage unit 36 preferably stores a contact terminal ID that is an identifier unique to the contact terminal device 13. The contact storage unit 36 may store a contact terminal ID, which is an example of authentication information, in advance, or may store authentication information received by the contact terminal device 13 through communication.

  The energy harvesting unit 37 includes an energy harvesting element that generates power using energy in the environment. In the environmental power generation unit 37, it is most important to generate power using energy in the environment. The power generation energy used by the environmental power generation unit 37 for power generation is, for example, light energy, thermal energy, vibration energy, and electromagnetic waves. Any of energy etc. may be sufficient. When the power generation energy is light energy, the energy harvesting element is a solar cell or the like, and when the power generation energy is heat energy, the energy harvesting element is a Seebeck element or the like. When the generated energy is vibration energy, the energy generating element is a piezoelectric element such as a piezo element, and when the generated energy is electromagnetic energy, the energy generating element is a rectenna or the like. In addition, the energy harvesting unit 37 may have one kind of various energy harvesting elements as an energy harvesting element, or may have two or more kinds.

  The environmental power generation unit 37 generates a voltage for driving the contact communication unit 34, a voltage for driving the contact control unit 35, and a voltage for driving the contact storage unit 36 when the energy generation element generates power. Generate.

  The environmental power generation unit 37 includes a power storage element that stores the electric power generated by the environmental power generation element, and a trigger signal of a voltage level that can be processed by the contact control unit 35 when the power storage amount in the power storage element exceeds a predetermined power storage amount. Is output. Note that the predetermined storage amount means that the contact communication unit 34, the contact control unit 35, and the contact storage unit 36 are in a state where each of the contact communication unit 34, the contact control unit 35, and the contact storage unit 36 is driven. 36 is the total amount of power consumed by each of the devices 36, and the amount of power on the premise that the drive voltages in the contact communication unit 34, the contact control unit 35, and the contact storage unit 36 are stable. .

  The contact control unit 35 is an example of a contact communication control unit and a contact authentication unit, and controls the contact reception unit 32 and the contact transmission unit 33 to receive and transmit a modulated signal. The contact control unit 35 processes the information signal generated by the contact receiving unit 32 and generates a signal for driving the contact communication unit 34 and a signal for driving the contact storage unit 36. The contact control unit 35 is an example of an authentication unit, and authenticates the mounting terminal device 12 using the mounting terminal ID transmitted from the mounting terminal device 12 and the collation data stored in the contact storage unit 36.

  The contact control unit 35 receives the trigger signal output from the energy harvesting unit 37. When the trigger signal is input, the contact control unit 35 controls the drive of the contact communication unit 34 and drives the contact storage unit 36. This control is executed according to a preset procedure. At this time, prior to outputting the trigger signal, the environmental power generation unit 37 applies a drive voltage to each of the contact communication unit 34, the contact control unit 35, and the contact storage unit 36. The contact control unit 35 executes a predetermined process in response to the input of the trigger signal. When the execution of this process ends, the contact control unit 35 stops driving until the next trigger signal is input.

[Example 1]
With reference to FIG. 3 and FIG. 4, in the first embodiment described above, the wearing terminal device 12 is a device that is worn on the wrist 11 a of the user 11, and the contact terminal device 13 is used as the energy harvesting unit 37. An example in which a piezoelectric element is included and mounted on an electrically assisted bicycle will be described. In the following, the overall configuration of the human body communication system 10 and the communication procedure in the human body communication system 10 will be described.

[Overall configuration of human body communication system]
The overall configuration of the human body communication system 10 will be described with reference to FIG.
As shown in FIG. 3, the human body communication system 10 includes an attachment terminal device 12 attached to the user 11 and a contact terminal device 13 that the electric assist bicycle 40 is equipped with. The attachment terminal device 12 is attached to the wrist 11a of the user 11 via an attachment portion 12a having a ring shape.

  The electrically assisted bicycle 40 includes a frame 41. A handle 42 is connected to one end of the two tube ends of the head tube 41h constituting the frame 41, and a front fork 43 is connected to the other end. ing. The contact electrode 31 of the contact terminal device 13 is located inside the grip portion 42a of one of the two cylindrical ends of the handle 42. The grip part 42a is an example of a contact part, and the contact terminal device 13 contacts the hand 11g of the user 11 in the grip part 42a.

  In the front fork 43, the end connected to the head tube 41h is the base end, each of the two ends away from the head tube 41h is the tip, and the front wheel 43 has a front wheel between the two ends. A motor device 45 that rotates 44 is located. The motor device 45 includes a motor and a motor driving unit that drives the motor.

  A housing 46 is located in the seat tube 41 s constituting the frame 41, and a motor power supply 47 that supplies power to the motor device 45 and a motor control unit 13 b that constitutes the contact terminal device 13 are disposed inside the housing 46. And is located. The motor control unit 13 b includes a contact communication unit 34, a contact control unit 35, and a contact storage unit 36 in the contact terminal device 13.

  Two gear cranks 48 are connected to one of the two cylinder ends of the seat tube 41s, and a pedal 49 is connected to the end of each gear crank 48 away from the seat tube 41s. Is connected. An energy harvesting unit 37 including a piezoelectric element is located inside the pedal 49. The environmental power generation unit 37 generates power by vibration given when the user 11 depresses the pedal 49 or when the wheel is rotated by the operation of the user 11, and generates a trigger signal from the generated power to generate a contact control unit. 35.

  In the contact terminal device 13, the contact electrode 31 is connected to the contact communication unit 34 via a wiring 13 c passing through each of the handle 42, the head tube 41 h, the down tube 41 d, and the seat tube 41 s. Each of the energy harvesting units 37 is connected to the motor control unit 13b via the wiring 49c passing through the pedal 49, the gear crank 48, and the seat tube 41s. The motor device 45 is also connected to the motor control unit 13b via the wiring 13c passing through each of the front fork 43, the head tube 41h, the down tube 41d, and the seat tube 41s.

[Processing procedure in human body communication]
With reference to FIG. 4, the procedure of the process in the human body communication between the mounting | wearing terminal device 12 and the contact terminal device 13 is demonstrated.

  As shown in FIG. 4, when the user 11 depresses the pedal 49 of the electric assist bicycle 40, the environmental power generation unit 37 generates power. The voltage signal output from the environmental power generation unit 37 is input to the contact control unit 35 as a trigger signal for starting the drive of the contact control unit 35 (step S11). Prior to inputting the trigger signal to the contact control unit 35, the environmental power generation unit 37 applies a driving voltage to the contact communication unit 34, the contact control unit 35, and the contact storage unit 36, and Human body communication with the wearing terminal device 12 becomes possible. And the contact terminal device 13 produces | generates and transmits the request | requirement signal which requests | requires transmission of mounting | wearing terminal ID with respect to the mounting | wearing terminal device 12 (step S12).

  The mounting terminal device 12 receives the request signal transmitted from the contact terminal device 13 (step S13), and the mounting control unit 25 processes the request signal. The wearing terminal device 12 reads the wearing terminal ID stored in the wearing storage unit 26 and transmits it to the contact terminal device 13 (step S14).

  The contact terminal device 13 receives the attachment terminal ID transmitted from the attachment terminal device 12 (step S15), and collates the received attachment terminal ID with the collation data stored in the contact storage unit 36, thereby attaching the attachment terminal. The device 12 is authenticated (step S16). When the authentication of the wearing terminal device 12 is successful, the contact terminal device 13 reads the contact terminal ID stored in the contact storage unit 36 and transmits it to the wearing terminal device 12 (step S17).

  The attachment terminal device 12 receives the contact terminal ID transmitted from the contact terminal device 13 (step S18), and collates the received contact terminal ID with the collation data stored in the attachment storage unit 26, thereby making the contact terminal device. 13 authentication is performed (step S19). When the authentication of the contact terminal device 13 is successful, the wearing terminal device 12 generates a success signal indicating that the authentication is successful and transmits it to the contact terminal device 13 (step S20).

  The contact terminal device 13 receives the success signal transmitted from the wearing terminal device 12 (step S21), and the contact control unit 35 processes the success signal to generate a signal for driving the motor device 45. That is, the contact terminal device 13 performs a process for driving the motor device 45 (step S22). Note that when the traveling state of the electrically assisted bicycle 40 satisfies the conditions for driving the motor device 45, the front wheels 44 are rotated by driving the motor device 45.

  In the human body communication system 10, the environmental power generation unit 37 included in the contact terminal device 13 generates electric power necessary for human body communication in the contact terminal device 13. Therefore, compared with the configuration in which the contact terminal device 13 does not include the energy harvesting unit 37, the power supply necessary for the contact terminal device 13 need not be replaced or charged, so that the frequency of power supply maintenance can be reduced. In addition, since the power source can be eliminated, the weight of the contact terminal device 13 can be reduced compared to the contact terminal device having the power source.

  On the other hand, when the authentication of the wearing terminal device 12 fails in step S <b> 16, the contact terminal device 13 does not transmit the contact terminal ID toward the wearing terminal device 12. Further, when the authentication of the contact terminal device 13 in step S19 fails, the wearing terminal device 12 does not transmit a success signal toward the contact terminal device 13. Therefore, in any of these cases, since the contact terminal device 13 does not perform the driving process of the motor device 45, even if the traveling state of the electrically assisted bicycle 40 satisfies the condition for driving the motor device 45, the motor Device 45 is not driven.

  In the human body communication system 10, both the authentication of the wearing terminal device 12 in the contact terminal device 13 and the authentication of the contact terminal device 13 in the wearing terminal device 12 are performed. Therefore, compared with the configuration in which only the authentication of the mounting terminal device in the contact terminal device is performed, the mounting terminal device 12 can avoid communicating with a terminal device that is different from the original. Therefore, the safety of human body communication between the wearing terminal device 12 and the contact terminal device 13 is further increased.

  Note that once the trigger signal is input to the contact control unit 35, the contact control unit 35 repeatedly performs the processing from step S <b> 12 onward while the supply of power from the environmental power generation unit 37 is continued.

  Thereby, in the human body communication system 10, authentication of the wearing terminal device 12 in the contact terminal device 13 is repeatedly performed every predetermined time. Therefore, as compared with the configuration in which the authentication of the wearing terminal device 12 is performed only once in the contact terminal device 13, a third party other than the user 11 wearing the wearing terminal device 12 has the electrically assisted bicycle 40 provided with the contact terminal device 13. The possibility of operating the assist function by the motor device 45 is reduced.

As described above, according to the first embodiment, the effects listed below can be obtained.
(1) The environmental power generation unit 37 included in the contact terminal device 13 generates electric power necessary for human body communication in the contact terminal device 13. Therefore, compared with the configuration in which the contact terminal device 13 does not include the energy harvesting unit 37, the power supply necessary for the contact terminal device 13 need not be replaced or charged, so that the frequency of power supply maintenance can be reduced.

  (2) Compared with the configuration in which only the authentication of the mounting terminal device in the contact terminal device is performed, the mounting terminal device 12 can avoid communicating with a terminal device different from the original. Therefore, the safety of human body communication between the wearing terminal device 12 and the contact terminal device 13 is further increased.

  (3) Compared with the configuration in which the authentication of the wearing terminal device 12 in the contact terminal device 13 is performed only once, a third party other than the user 11 wearing the wearing terminal device 12 includes the contact terminal device 13. The possibility of operating the 40 assist functions can be reduced.

The first embodiment described above can be implemented with appropriate modifications as follows.
The contact terminal device 13 may include a power supply unit that supplies power to the contact control unit 35. In such a configuration, the contact control unit 35 may be configured to switch the power saving mode to the normal mode when a trigger signal is input. The power supply unit constantly applies a drive voltage to the contact control unit 35, while applying a voltage to the contact communication unit 34 and the contact storage unit 36 only when the contact control unit 35 is in the normal mode. I just need it. Alternatively, the energy harvesting unit 37 inputs a trigger signal to the power supply unit, and when the trigger signal is input, the power supply unit applies a drive voltage to the contact control unit 35, the contact communication unit 34, and the contact storage unit 36. It may be configured.

In the configuration in which the contact terminal device 13 includes a power supply unit that supplies power to the contact control unit 35, the power generated by the environmental power generation unit 37 may be charged in the power supply unit.
The human body communication system 10 may not repeat the processing from step S12 to step S22, and may be configured to perform the processing from step S12 to step S22 only once when a trigger signal is input to the contact control unit 35.

  As shown in FIG. 5, the authentication of the contact terminal device 13 may be performed before the authentication of the wearing terminal device 12. That is, when a trigger signal for starting driving of the contact control unit 35 is input to the contact control unit 35 (step S31), a request signal for requesting the contact terminal ID stored in the contact storage unit 36 is provided. It transmits to the apparatus 12 (step S32).

  The wearing terminal device 12 receives the contact terminal ID transmitted from the contact terminal device 13 (step S33), and collates the received contact terminal ID with the collation data stored in the wearing storage unit 26 to thereby contact the contact terminal device. 13 is authenticated (step S34). When the authentication of the contact terminal device 13 is successful, the mounting terminal device 12 reads and transmits the mounting terminal ID stored in the mounting storage unit 26 (step S35).

  The contact terminal device 13 receives the attachment terminal ID transmitted by the attachment terminal device 12 (step S36), and collates the received attachment terminal ID with the collation data stored in the contact storage unit 36, thereby attaching the attachment terminal. The device 12 is authenticated (step S37). When the authentication of the mounting terminal device 12 is successful, the contact terminal device 13 generates a signal for driving the motor device 45. That is, the contact terminal device 13 performs a process for driving the motor device 45 (step S38).

  According to this, the number of signals exchanged between the wearing terminal device 12 and the contact terminal device 13 is reduced and the wearing at the contact terminal device 13 is reduced as compared with the processing procedure described with reference to FIG. Authentication of the terminal device 12 and authentication of the contact terminal device 13 at the wearing terminal device 12 can be performed.

  -As FIG. 6 shows, the authentication of the contact terminal device 13 does not need to be performed. That is, when a trigger signal for starting the drive of the contact control unit 35 is input to the contact control unit 35 (step S41), the contact control unit 35 requests the mounting terminal device 12 to transmit the mounting terminal ID. A request signal to be generated is generated and transmitted (step S42).

  The mounting terminal device 12 receives the request signal transmitted from the contact terminal device 13 (step S43), the mounting control unit 25 processes the request signal, and reads the mounting terminal ID stored in the mounting storage unit 26. Then, the data is transmitted to the contact terminal device 13 (step S44).

  The contact terminal device 13 receives the mounting terminal ID transmitted from the mounting terminal device 12 (step S45), and collates the received mounting terminal ID with the collation data stored in the contact storage unit 36 to match the mounting terminal. The device 12 is authenticated (step S46). When the authentication of the mounting terminal device 12 is successful, the contact terminal device 13 generates a signal for driving the motor device 45. That is, the contact terminal device 13 performs a process for driving the motor device 45 (step S47).

  According to this, since the authentication of the wearing terminal device 12, that is, the authentication of the user 11 wearing the wearing terminal device 12 is performed at least, the contact terminal device 13 does not wear the wearing terminal device 12. It is suppressed by the person who is used in the same state as the user 11.

  The contact terminal device 13 may not be configured to perform the driving process of the motor device 45 when the authentication of the mounting terminal device 12 is successful. For example, the electrically assisted bicycle 40 includes a gear control unit that controls driving of the gear unit, a gear unit that is driven by a control signal output from the gear control unit, and an input unit for inputting a gear operation of the user 11. The structure provided with the gear apparatus comprised from these may be sufficient. In this case, the contact terminal device 13 may be configured to drive the gear device when the wearing terminal device 12 is successfully authenticated. When the wearing terminal device 12 is successfully authenticated, the gear device changes the gear based on the traveling state of the electric assist bicycle 40 or changes the gear based on the operation of the user 11. On the other hand, when the authentication of the wearing terminal device 12 fails, the gear device does not change the gear based on the traveling state of the electrically assisted bicycle 40 or change the gear based on the operation of another person. Even in the configuration including the gear device, the mounting terminal device 12 may authenticate the contact terminal device 13.

  The contact terminal device 13 may not be configured to perform the driving process of the motor device 45 when the authentication of the mounting terminal device 12 is successful. For example, the electric assist bicycle 40 may be configured to include a key device that performs locking and unlocking according to a signal from the contact terminal device 13. For example, the key device stops the rotation of the front wheel 44 in the electrically assisted bicycle 40 by locking. In such a configuration, when the authentication in step S16 in FIG. 4 fails, the contact terminal device 13 generates a signal for driving the key device, and when the authentication in step S19 in FIG. However, a signal for driving the key device may be generated.

[Second Embodiment]
With reference to FIGS. 7 to 9, a second embodiment in which each of the wearing terminal device, the contact terminal device, and the human body communication system is embodied will be described. The second embodiment is different from the first embodiment in that the wearing terminal device includes an energy harvesting unit, whereas the contact terminal device does not include the energy harvesting unit. Therefore, in the following, in order to explain these differences in detail, the configuration of each terminal device, an example of a human body communication system, and a communication processing procedure in the example will be described in order. In the following, in FIG. 7 to FIG. 9, the same reference numerals are assigned to the same components as those described in the first embodiment, and detailed description of these components is omitted.

[Configuration of each terminal device]
With reference to FIG. 7, the structure of the mounting | wearing terminal device 12 and the structure of the contact terminal device 13 are demonstrated.

  As shown in FIG. 7, the wearing terminal device 12 includes a wearing electrode 21, a wearing communication unit 24, a wearing storage unit 26, and a power supply unit 27, similarly to the wearing terminal device 12 of the first embodiment, and further includes a wearing device. A control unit 51, a switch unit 52, and an energy harvesting unit 53 are provided.

  When the switch unit 52 is in the ON state, the switch unit 52 applies the drive voltage generated by the power supply unit 27 to each of the mounting communication unit 24 and the mounting storage unit 26. On the other hand, the switch unit 52 does not apply the drive voltage generated by the power supply unit 27 to each of the mounting communication unit 24 and the mounting storage unit 26 when the switch unit 52 is in the off state. Note that the power supply unit 27 continuously applies the generated drive voltage to the mounting control unit 51.

  Similar to the energy harvesting unit 37 of the first embodiment, the energy harvesting unit 53 includes an energy harvesting element that generates power using energy in the environment. In the energy harvesting unit 53, it is most important to generate power using energy in the environment, and the energy harvesting element included in the energy harvesting unit 53 may be at least one of the various energy harvesting elements described above. .

  The environmental power generation unit 53 includes a power storage element that stores the electric power generated by the environmental power generation element, and a trigger signal of a voltage level that can be processed by the mounting control unit 51 when the power storage amount in the power storage element exceeds a predetermined power storage amount Is output.

  The mounting control unit 51 has the same function as the mounting control unit 25 of the first embodiment. The wearing control unit 51 further switches the power saving mode to the normal mode by inputting a trigger signal. When the wearing control unit 51 is in the power saving mode, the wearing control unit 51 performs only a predetermined process set in advance, and does not perform a process related to human body communication. On the other hand, when the wearing control unit 51 is in the normal mode, the wearing control unit 51 performs processing related to human body communication.

  When the trigger signal is input from the energy harvesting unit 53, the mounting control unit 51 generates a control signal for turning on the switch unit 52. When a series of processing based on the trigger signal is completed, the mounting control unit 51 generates a control signal for turning off the switch unit 52 and switches the normal mode to the power saving mode.

  Similar to the contact terminal device 13 of the first embodiment, the contact terminal device 13 includes a contact electrode 31, a contact communication unit 34, a contact control unit 35, and a contact storage unit 36, and further includes a power supply unit 61. .

  The power supply unit 61 is connected to each of the contact communication unit 34, the contact control unit 35, and the contact storage unit 36, and supplies power to each of the contact communication unit 34, the contact control unit 35, and the contact storage unit 36. To do. The power supply unit 61 may be any one of a primary battery, a secondary battery, an electric double layer capacitor, and an organic radical battery.

[Example 2]
With reference to FIGS. 8 and 9, the second embodiment described above is embodied as a vital sensor in which the wearing terminal device 12 is worn on the chest 11 e of the user 11 and has a Seebeck element as the energy harvesting unit 53. An example in which the contact terminal device 13 is embodied as a biological information collecting device will be described. In the following, the overall configuration of the human body communication system 10 and the communication procedure in the human body communication system 10 will be described.

[Overall configuration of human body communication system]
The overall configuration of the human body communication system will be described with reference to FIG.
As shown in FIG. 8, the human body communication system 10 includes a vital sensor VS mounted on the chest 11 e of the user 11 and mounting the mounting terminal device 12, and a contact terminal device 13 mounted on the biological information collection device 70. Yes. The wearing terminal device 12 has a Seebeck element as the environmental power generation unit 53, and generates power by a temperature difference between the body temperature of the user 11 and the environmental temperature. The vital sensor VS has, for example, an acquisition unit VS1 that acquires an electrical signal of the heart as a biological information signal, and acquires the acquisition unit VS1 in the contact terminal device 13 mounted on the biological information collection device 70 using the mounting terminal device 12. Transmit the biometric information signal.

  The biological information collection device 70 is located on the mounting table T and includes, for example, a contact panel 71, an information processing unit 72, and a display unit 73. In the contact terminal device 13, the contact electrode 31 is located on the outer surface of the contact panel 71 or inside the contact panel 71, and the information acquisition control unit 13 d configuring the contact terminal device 13 is provided inside the information processing unit 72. Is located. The information acquisition control unit 13d includes a contact communication unit 34, a contact control unit 35, a contact storage unit 36, and a power supply unit 61. The contact electrode 31 connects the contact communication unit 34 and the wiring 13c of the information acquisition control unit 13d. Connected through.

[Processing procedure in human body communication]
With reference to FIG. 9, the procedure of the process in the human body communication between the wearing terminal device 12 and the contact terminal device 13 will be described.

  As shown in FIG. 9, when the vital sensor VS is attached to the chest 11e of the user 11 and the energy generating unit 53 of the wearing terminal device 12 generates power, the energy generating unit 53 outputs a trigger signal that is a voltage signal, A signal is input to the mounting control unit 25 (step S51). When the trigger signal is input, the attachment control unit 51 switches the power saving mode to the normal mode, and generates and outputs an ON signal that is a control signal for turning on the switch unit 52 (step S52). Accordingly, the power supply unit 27 applies a driving voltage to each of the wearing communication unit 24 and the wearing storage unit 26, so that the wearing terminal device 12 can perform human body communication with the contact terminal device 13.

  On the other hand, the contact terminal device 13 transmits a request signal for requesting the mounting terminal device 12 to transmit the mounting terminal ID every predetermined time (step S53). However, while the wearing control unit 51 of the wearing terminal device 12 is in the power saving mode, even if the contact terminal device 13 transmits a request signal, the wearing terminal device 12 does not receive it, and thus the subsequent processing does not proceed.

  On the other hand, when the driving voltage of the power supply unit 27 is applied to the wearing communication unit 24 in step S52, the wearing terminal device 12 receives the request signal transmitted from the contact terminal device 13 (step S54). The mounting control unit 51 processes the request signal, and reads and transmits the mounting terminal ID stored in the mounting storage unit 26 (step S55).

  The contact terminal device 13 receives the attachment terminal ID transmitted from the attachment terminal device 12 (step S56), and collates the received attachment terminal ID with the collation data stored in the contact storage unit 36, thereby attaching the attachment terminal device. 12 authentication is performed (step S57). When the authentication of the wearing terminal device 12 is successful, the contact terminal device 13 reads the contact terminal ID stored in the contact storage unit 36 and transmits it to the wearing terminal device 12 (step S58).

  The wearing terminal device 12 receives the contact terminal ID transmitted from the contact terminal device 13 (step S59), and collates the received contact terminal ID with the collation data stored in the wearing storage unit 26 to thereby contact the contact terminal device. 13 authentication is performed (step S60). When the authentication of the contact terminal device 13 is successful, the wearing terminal device 12 transmits the biological information signal acquired by the acquisition unit VS1 (step S61). When the wearing terminal device 12 transmits the biometric information signal, the wearing control unit 25 generates and outputs an off signal that is a control signal for turning the switch unit 52 off (step S62). Then, the wearing control unit 25 switches the normal mode to the power saving mode, and maintains the state of the power saving mode until the trigger signal is next input to the wearing control unit 25.

The contact terminal device 13 receives the biological information signal transmitted from the wearing terminal device 12 (step S63), and outputs the biological information signal to the processing unit included in the information processing unit 72 (step S64).
In the mounting terminal device 12, the power supply unit 27 receives the trigger signal from the energy harvesting unit 53 and only when the series of processing based on the trigger signal is performed, the mounting communication unit 24 and the mounting storage unit 26. To supply power. Therefore, the frequency of the replacement of the power supply unit 27 and the charging of the power supply unit 27 can be reduced as compared with the configuration in which the power supply unit 27 always supplies power to the mounting control unit 51 and the like. Therefore, the maintenance frequency of the mounting terminal device 12 can be reduced.

As described above, according to the second embodiment, the following effects can be obtained.
(4) Compared with the configuration in which the power supply unit 27 included in the contact terminal device 13 always supplies power to the mounting control unit 51, the mounting communication unit 24, and the mounting storage unit 26, 27 can be charged less frequently. Therefore, it is possible to reduce the frequency of power supply maintenance of the mounted terminal device 12.

Note that the second embodiment described above can be implemented with appropriate modifications as follows.
If the amount of power generated by the environmental power generation unit 53 is such that the mounting communication unit 24, the mounting control unit 51, and the mounting storage unit 26 can be driven, the mounting terminal device 12 has a power supply unit 27. It is not necessary to have.

  As shown in FIG. 10, the authentication of the contact terminal device 13 may be performed before the authentication of the wearing terminal device 12. That is, when a trigger signal is input to the wearing control unit 51 (step S71), the wearing control unit 51 switches the power saving mode to the normal mode. Then, the mounting control unit 51 generates and outputs an ON signal for the switch unit 52 (step S72). Thus, when the human body communication with the contact terminal device 13 becomes possible, the wearing terminal device 12 generates and transmits a request signal for requesting the contact terminal device to transmit the contact terminal ID (step S73).

  The contact terminal device 13 receives the request signal transmitted from the mounting terminal device 12 (step S74), reads the contact terminal ID stored in the contact storage unit 36, and transmits the contact terminal ID to the mounting terminal device 12 (step S74). S75).

  The wearing terminal device 12 receives the contact terminal ID transmitted from the contact terminal device 13 (step S76), and collates the received contact terminal ID with the collation data stored in the wearing storage unit 26, thereby making the contact terminal device. 13 is authenticated (step S77). When the authentication of the contact terminal device 13 is successful, the attachment terminal device 12 reads out the attachment terminal ID stored in the attachment storage unit 26 and transmits it to the contact terminal device 13 (step S78).

  The contact terminal device 13 receives the attachment terminal ID transmitted from the attachment terminal device 12 (step S79), and collates the received attachment terminal ID with the collation data stored in the contact storage unit 36, thereby attaching the attachment terminal device. 12 authentication is performed (step S80). When the authentication of the wearing terminal device 12 is successful, the contact terminal device 13 generates a request signal for requesting the transmission of the biological information signal and transmits it to the wearing terminal device 12 (step S81).

  The wearing terminal device 12 receives the request signal transmitted from the contact terminal device 13 (step S82), and transmits the biological information signal acquired by the acquisition unit VS1 (step S83). When the wearing terminal device 12 transmits the biological information signal, the wearing control unit 51 generates and outputs an off signal for the switch unit 52 (step S84). Then, the wearing control unit 51 switches the normal mode to the power saving mode, and maintains the power saving mode until a trigger signal is next input to the wearing control unit 51.

The contact terminal device 13 receives the biological information signal transmitted from the wearing terminal device 12 (step S85), and outputs the biological information signal to the processing unit included in the information processing unit 72 (step S86).
According to the modification, it is possible to suppress power consumption in the contact terminal device 13 because the contact terminal device 13 does not need to repeatedly transmit a request signal for the mounting terminal ID to the mounting terminal device 12. Therefore, it is possible to reduce the frequency of power supply maintenance of the contact terminal device 13.

  In the processing procedure shown in FIG. 9, the wearing terminal device 12 may repeat the processing from step S54 to step S61 twice or more after the trigger signal is once input, and then perform the processing in step S62. Good.

  In the processing procedure shown in FIG. 10, the wearing terminal device 12 may repeat the processing from step S73 to step S83 twice or more after the trigger signal is once input, and then perform the processing in step S84. Good.

  In the mounting terminal device 12, the power supply unit 27 may always apply a driving voltage to the mounting control unit 51, and the mounting control unit 51 may not be configured to switch the power saving mode to the normal mode by inputting a trigger signal. That is, the energy harvesting unit 53 inputs a trigger signal to the power supply unit 27, and the power supply unit 27 applies driving voltages to the mounting control unit 51, the mounting communication unit 24, and the mounting storage unit 26 in response to the trigger signal input. A configuration in which a state in which no voltage is applied is switched to a state in which a driving voltage is applied may be employed. According to such a configuration, power consumption in a state where the mounting control unit 51 is in the power saving mode is suppressed, and therefore the frequency of power supply maintenance in the mounting terminal device 12 is further reduced.

[Third Embodiment]
With reference to FIGS. 10 to 12, a third embodiment in which each of the wearing terminal device, the contact terminal device, and the human body communication system is embodied will be described. The third embodiment is different from the second embodiment in that the contact terminal device includes an energy harvesting unit. Therefore, in the following, in order to explain these differences in detail, the configuration of each terminal device, an example of a human body communication system, and a communication processing procedure in the example will be described in order. In the following, in FIGS. 10 to 12, the same reference numerals are assigned to the same components as those described in the second embodiment, and detailed description of these components is omitted.

[Configuration of each terminal device]
With reference to FIG. 11, the structure of the mounting | wearing terminal device 12 and the structure of the contact terminal device 13 are demonstrated. In the following description, the configuration of the mounting terminal device 12 is the same as the configuration of the mounting terminal device 12 of the second embodiment, and thus the description thereof is omitted.

  As shown in FIG. 11, the contact terminal device 13 includes a contact electrode 31, a contact communication unit 34, a contact storage unit 36, and a power supply unit 61, similarly to the contact terminal device 13 of the second embodiment, and further includes a contact A control unit 81, a switch unit 82, and an energy harvesting unit 83 are provided.

  The switch unit 82 applies the drive voltage of the power supply unit 61 to the contact communication unit 34 and the contact storage unit 36 when the switch unit 82 is in the ON state. On the other hand, the switch unit 82 does not apply the drive voltage of the power supply unit 61 to the contact communication unit 34 and the contact storage unit 36 when the switch unit 82 is in the off state. Note that the power supply unit 61 continues to apply a drive voltage to the contact control unit 81.

  Similar to the energy harvesting unit 37 of the first embodiment, the energy harvesting unit 83 includes an energy harvesting element that generates power using energy in the environment. In the energy harvesting unit 83, it is most important to generate electricity using energy in the environment, and the energy harvesting element included in the energy harvesting unit 83 may be at least one of the various energy harvesting elements described above. .

  The environmental power generation unit 83 includes a power storage element that stores the electric power generated by the environmental power generation element, and a trigger signal of a voltage level that can be processed by the contact control unit 81 when the power storage amount in the power storage element exceeds a predetermined power storage amount Is output.

  The contact control unit 81 has the same function as the contact control unit 35 of the second embodiment. The contact control unit 81 further switches the power saving mode to the normal mode by inputting a trigger signal. When the contact control unit 81 is in the power saving mode, the contact control unit 81 performs only predetermined processing set in advance, and does not perform processing related to human body communication. On the other hand, when the contact control unit 81 is in the normal mode, the contact control unit 81 performs processing related to human body communication.

  The contact control unit 81 outputs a control signal for turning on the switch unit 82 when a trigger signal is input from the energy harvesting unit 83. When a series of processes based on the trigger signal is completed, the contact control unit 81 generates a control signal for turning off the switch unit 82 and switches the normal mode to the power saving mode.

[Example 3]
With reference to FIG. 12 and FIG. 13, in the third embodiment described above, the wearing terminal device 12 is embodied as a terminal device having a piezoelectric element as the environmental power generation unit 53, and the contact terminal device 13 is An example embodied as an automatic ticket gate system having a piezoelectric element as the unit 83 will be described. In the following, the overall configuration of the human body communication system 10 and the communication procedure in the human body communication system 10 will be described.

[Overall configuration of human body communication system]
The overall configuration of the human body communication system 10 will be described with reference to FIG.
As shown in FIG. 12, the human body communication system 10 includes a mounting terminal device 12 mounted on the wrist 11 a of the user 11 and a contact terminal device 13 mounted on the automatic ticket gate system 90. The wearing terminal device 12 has a piezoelectric element as the environmental power generation unit 53, and the piezoelectric element generates power by vibration given by the user 11 shaking his / her arm.

  The automatic ticket gate system 90 includes, for example, an automatic ticket gate 91 including two housings 91a and 91b, and a contact mat 92 positioned between the two housings 91a and 91b. Each of the two casings 91a and 91b has a door 93. In each door 93, an open state that is located along a direction substantially parallel to the extending direction of each casing, The state changes between a closed state that is a state located along a direction substantially orthogonal to the extending direction. When each door 93 is in an open state, the user 11 can pass through the automatic ticket gate 91 through the space between the two housings 91a and 91b. On the other hand, when each door 93 is in a closed state, the user 11 cannot pass through the automatic ticket gate 91 through the space between the two housings 91a and 91b.

  Inside one housing 91a, a door control unit 13e constituting the contact terminal device 13 is located. The door control unit 13e includes a contact communication unit 34, a contact storage unit 36, a power supply unit 61, a contact control unit 81, And it is comprised from the switch part 82. FIG.

  The contact mat 92 includes the contact electrode 31, and the contact electrode 31 may be positioned on the outer surface of the contact mat 92 or may be positioned inside the contact mat 92. The contact mat 92 further includes an energy harvesting unit 83, and the energy harvesting unit 83 is located inside the contact mat 92. The contact electrode 31 is connected to the contact communication unit 34 of the door control unit 13e by a wiring 13c passing through the inside of the contact mat 92 and the inside of the housing 91a. Similarly, the environmental power generation unit 83 is connected to the door control unit 13e by a wiring 13c passing through the inside of the contact mat 92 and the inside of the housing 91a. The actuator that changes the state of each door 93 is also connected to the door control unit 13e by the wiring 13c.

[Processing procedure in human body communication]
With reference to FIG. 13, the procedure of the process in the human body communication between the wearing terminal device 12 and the contact terminal device 13 will be described.

  As shown in FIG. 13, when the energy generating unit 83 generates power by the foot 11h of the user 11 stepping on the energy generating unit 83 of the contact mat 92, the energy generating unit 83 outputs a trigger signal, which is a voltage signal. A trigger signal is input to the contact control unit 81 (step S91). When the trigger signal is input, the contact control unit 81 switches the power saving mode to the normal mode, and generates and outputs an ON signal for the switch unit 82 (step S92). Thereby, since the power supply unit 61 applies the generated drive voltage to the contact communication unit 34 and the contact storage unit 36, the contact terminal device 13 can perform human body communication with the wearing terminal device 12. And the contact control part 35 produces | generates and transmits the request signal which requests | requires transmission of mounting | wearing terminal ID with respect to the mounting | wearing terminal apparatus 12 (step S93).

  On the other hand, when the wearing terminal device 12 is worn on the wrist 11a of the user 11 and vibration is applied to the energy harvesting unit 53, the trigger signal output from the energy harvesting unit 53 is input to the wearing control unit 51 (step S94). . When the trigger signal is input, the mounting control unit 51 switches the power saving mode to the normal mode, and generates and outputs an ON signal for the switch unit 52 (step S95). Thereby, since the power supply unit 27 applies the drive voltage to the wearing communication unit 24 and the wearing storage unit 26, the wearing terminal device 12 can perform human body communication with the contact terminal device 13. Then, the wearing terminal device 12 receives the request signal transmitted from the contact terminal device 13 (step S96). When receiving the request signal, the mounting terminal device 12 reads the mounting terminal ID stored in the mounting storage unit 26 and transmits it to the contact terminal device 13 (step S97). When transmitting the mounting terminal ID, the mounting terminal device 12 generates and outputs an off signal for the switch unit 52 (step S98). Then, the wearing control unit 25 switches the normal mode to the power saving mode, and maintains the state of the power saving mode until the trigger signal is next input to the wearing control unit 25.

  In step S93, the contact terminal device 13 transmits a request signal requesting the mounting terminal device 12 to transmit the mounting terminal ID every predetermined time. However, while the mounting control unit 25 of the mounting terminal device 12 is in the power saving mode, even if the contact terminal device 13 transmits a request signal, the mounting terminal device 12 does not receive it, and thus the subsequent processing does not proceed. Therefore, the contact terminal device 13 generates and outputs an off signal for the switch unit 82 when the mounting terminal ID cannot be received even after a predetermined time has elapsed since the first request signal was transmitted. The contact control unit 81 switches the normal mode to the power saving mode and maintains the power saving mode until the next trigger signal is input.

  In contrast, in step S95, the wearing terminal device 12 generates and outputs an off signal when the request signal cannot be received even after a predetermined time has elapsed since the on signal was output to the switch unit 52. Then, the wearing control unit 51 switches the normal mode to the power saving mode and maintains the power saving mode until the next trigger signal is input.

  When the contact terminal device 13 receives the mounting terminal ID transmitted from the mounting terminal device 12 (step S99), the contact terminal device 13 collates the received mounting terminal ID with the collation data stored in the contact storage unit 36, thereby mounting the mounting terminal device. 12 authentication is performed (step S100). When the authentication of the mounting terminal device 12 is successful, the contact terminal device 13 generates and outputs an information signal for changing each door 93 from the closed state to the open state, that is, performs a driving process for each door 93 ( Step S101). When the contact terminal device 13 performs the driving process of each door 93, the contact terminal device 13 generates and outputs an off signal to the switch unit 82 (step S102). Then, the contact control unit 81 switches the normal mode to the power saving mode and maintains the power saving mode until the next trigger signal is input. In addition, each door 93 is a state which opened the door from the other control part with which the automatic ticket gate system 90 is provided based on the detection signal from the detection part etc. which detect that the user 11 passed between the two doors 93, for example. When the information signal for changing from to the closed state is input, the closed state is entered.

  In the mounting terminal device 12, the power supply unit 27 receives the trigger signal from the energy harvesting unit 53 and only when the series of processing based on the trigger signal is performed, the mounting communication unit 24 and the mounting storage unit 26. To supply power. Therefore, the frequency of replacement of the power supply unit 27 and charging of the power supply unit 27 can be reduced as compared with the configuration in which the power supply unit 27 always supplies power to the mounting communication unit 24 and the mounting storage unit 26. Therefore, the frequency of maintenance of the power supply in the mounting terminal device 12 can be reduced.

  Furthermore, in the contact terminal device 13, the power supply unit 61 receives the trigger signal from the environmental power generation unit 83 and the contact communication unit 34 and the contact memory only while a series of processes based on the trigger signal is performed. Power is supplied to the unit 36. Therefore, compared with the configuration in which the power supply unit 61 always supplies power to the contact communication unit 34 and the contact storage unit 36, the frequency of replacement of the power supply unit 61 and filling of the power supply unit 61 can be reduced. Therefore, the frequency of power supply maintenance in the contact terminal device 13 can be reduced.

As described above, according to the third embodiment, the following effects can be obtained.
(5) The frequency of maintenance of the power supply in each terminal device can be lowered in both the wearing terminal device 12 and the contact terminal device 13 constituting the human body communication system 10.

Note that the third embodiment described above can be implemented with appropriate modifications as follows.
The contact terminal device 13 has a power supply unit 61 as long as the amount of power generated by the environmental power generation unit 83 is such that each of the contact communication unit 34, the contact control unit 81, and the contact storage unit 36 can be driven. It is not necessary to have.

  If the amount of power generated by the environmental power generation unit 53 is such that each of the mounting communication unit 24, the mounting control unit 51, and the mounting storage unit 26 can drive the mounting terminal device 12, the power source unit 27 It is not necessary to have.

-Moreover, both the mounting | wearing terminal device 12 and the contact terminal device 13 do not need to have a power supply part.
As shown in FIG. 14, human body communication between the wearing terminal device 12 and the contact terminal device 13 may be started when the wearing terminal device 12 transmits the wearing terminal ID. That is, when the trigger signal output from the energy harvesting unit 53 is input to the mounting control unit 51 (step S111), the mounting control unit 51 switches the power saving mode to the normal mode and generates an ON signal for the switch unit 52. Output (step S112). Thereby, since the power supply unit 27 applies the drive voltage to the wearing communication unit 24 and the wearing storage unit 26, the wearing terminal device 12 can perform human body communication with the contact terminal device 13. And the mounting terminal device 12 reads mounting terminal ID which the mounting memory | storage part 26 has memorize | stored, and transmits toward the contact terminal device 13 (step S113). When transmitting the mounting terminal ID, the mounting terminal device 12 generates and outputs an off signal for the switch unit 52 (step S114). Then, the wearing control unit 51 switches the normal mode to the power saving mode and maintains the power saving mode until the next trigger signal is input.

  On the other hand, when the trigger signal output from the energy harvesting unit 83 is input to the contact control unit 81 (step S115), the contact control unit 81 switches the power saving mode to the normal mode and generates an ON signal for the switch unit 82. Output (step S116). Thereby, since the power supply part 61 applies a drive voltage to the contact communication part 34 and the contact memory | storage part 36, the contact terminal device 13 can perform human body communication with the mounting | wearing terminal device 12. FIG. Then, the contact terminal device 13 receives the mounting terminal ID transmitted from the mounting terminal device 12 (step S117).

  Note that the contact terminal device 13 generates and outputs an off signal to the switch unit 82 when the wearing terminal ID cannot be received even after a predetermined time has elapsed since the on signal was output. The contact control unit 81 switches the normal mode to the power saving mode and maintains the power saving mode until the next trigger signal is input.

  Upon receiving the mounting terminal ID transmitted from the mounting terminal device 12, the contact terminal device 13 authenticates the mounting terminal device 12 by comparing the received mounting terminal ID with the verification data stored in the contact storage unit 36. This is performed (step S118). When the authentication of the mounting terminal device 12 is successful, the contact terminal device 13 generates and outputs an information signal for changing each door 93 from the closed state to the open state, that is, performs a driving process for each door 93 ( Step S119). When the contact terminal device 13 performs the driving process of each door 93, the contact terminal device 13 generates and outputs an off signal to the switch unit 82 (step S120). Then, the contact control unit 35 switches the normal mode to the power saving mode and maintains the power saving mode until the next trigger signal is input.

  According to this, since the mounting terminal device 12 only transmits the mounting terminal ID between the mounting terminal device 12 and the contact terminal device 13, the contact terminal device 13 transmits a signal to the mounting terminal device 12. Accordingly, the power consumption in the contact terminal device 13 can be suppressed. Therefore, in the contact terminal device 13, the frequency of power supply maintenance can be reduced.

  -In the mounting terminal device 12, the structure in which the energy harvesting part 53 inputs a trigger signal to the power supply part 27 may be sufficient like the modification of 2nd Embodiment. In such a configuration, the power supply unit 27 can switch the state in which the driving voltage is applied to each of the mounting control unit 51, the mounting communication unit 24, and the mounting storage unit 26 to the state in which the driving voltage is not applied by inputting a trigger signal. That's fine. According to such a configuration, power consumption in a state where the mounting control unit 51 is in the power saving mode is suppressed, and therefore the frequency of power supply maintenance in the mounting terminal device 12 is further reduced.

  In the contact terminal device 13, the energy harvesting unit 83 may input a trigger signal to the power supply unit 61. In such a configuration, the power supply unit 61 can switch from the state in which the drive voltage is not applied to each of the contact control unit 81, the contact communication unit 34, and the contact storage unit 36 to the state in which the drive voltage is applied by inputting a trigger signal. That's fine. According to such a configuration, power consumption in a state where the contact control unit 81 is in the power saving mode is suppressed, and therefore the frequency of power supply maintenance in the contact terminal device 13 is further reduced.

  DESCRIPTION OF SYMBOLS 10 ... Human body communication system, 11 ... User, 11a ... Wrist, 11b ... Finger, 11c ... Face, 11d ... Neck, 11e ... Chest, 11f ... Ankle, 11g ... Hand, 11h ... Leg, 11i ... Buttocks, 12 ... Wearing terminal Device, 12a ... Mounting unit, 13 ... Contact terminal device, 13a ... Contact unit, 13b ... Motor control unit, 13c ... Wiring, 13d ... Information acquisition control unit, 13e ... Door control unit, 14 ... Communication path, 21 ... Mounting electrode , 22 ... wearing receiver, 23 ... wearing transmitter, 24 ... wearing communication unit, 25 ... wearing controller, 26 ... wearing storage unit, 27 ... power supply unit, 31 ... contact electrode, 32 ... contact receiving unit, 33 ... contact Transmission unit 34 ... Contact communication unit 35 ... Contact control unit 36 ... Contact storage unit 37 ... Energy power generation unit 40 ... Electric assist bicycle 41 ... Frame 41d Down tube 41h ... Head tube 41s 42 ... handle, 42a ... gripping part, 43 ... front fork, 44 ... front wheel, 45 ... motor device, 46 ... housing, 47 ... motor power supply, 48 ... gear crank, 49 ... pedal, 51 ... mounting control part, 52 ... Switch unit, 53 ... Energy generation unit, 61 ... Power source unit, 70 ... Biometric information collecting device, 71 ... Contact panel, 72 ... Information processing unit, 73 ... Display unit, 81 ... Contact control unit, 82 ... Switch unit, 83 ... Environmental power generation unit, 90 ... Automatic ticket gate system, 91 ... Automatic ticket gate, 91a, 91b ... Case, 92 ... Contact mat, 93 ... Door, T ... Place, VS ... Vital sensor, VS1 ... Acquisition unit.

Claims (7)

A mounting part to be mounted on the user;
A communication unit that performs human body communication with the contact terminal device contacting the user and the user as a route;
A storage unit for storing authentication information used by the contact terminal device for authentication of the user;
A communication control unit for controlling the human body communication by the communication unit and transmitting the authentication information to the contact terminal device by the human body communication;
An environmental power generation unit that generates electric power using at least a part of electric power used for human body communication using energy in the environment , and includes the environmental power generation element and a power storage element that stores electric power generated by the environmental power generation element A power generation unit ,
The energy harvesting unit outputs a trigger signal when the amount of electricity stored in the electricity storage element exceeds a predetermined amount of electricity stored,
The communication control unit switches the power saving mode to a normal mode by inputting the trigger signal, the power saving mode is a mode in which the communication control unit does not perform processing related to the human body communication, and the normal mode is the mode A wearing terminal device in a mode in which a communication control unit performs processing related to the human body communication . A contact portion that contacts the user;
A communication unit that performs a human body communication with the wearing terminal device worn by the user and the user as a route;
A communication control unit for controlling the human body communication by the communication unit and receiving the authentication information transmitted by the wearing terminal device;
An authentication unit that performs authentication using the received authentication information;
An environmental power generation unit that generates at least a part of electric power used for human body communication from energy in the environment, the energy storage element storing electric power generated by the energy generation element and the energy generation element
Including the energy harvesting unit including :
The energy harvesting unit outputs a trigger signal when the amount of electricity stored in the electricity storage element exceeds a predetermined amount of electricity stored,
The communication control unit switches the power saving mode to a normal mode by inputting the trigger signal, the power saving mode is a mode in which the communication control unit does not perform processing related to the human body communication, and the normal mode is the mode A contact terminal device which is a mode in which a communication control unit performs processing related to the human body communication . A wearing terminal device worn by the user;
A contact terminal device in contact with the user,
The wearing terminal device
A wearing communication unit for performing human body communication with the contact terminal device and the user as a route;
A wearing storage unit that stores authentication information used by the contact terminal device for authentication of the user;
A wearing communication control unit that controls the human body communication by the wearing communication unit and transmits the authentication information to the contact terminal device through the human body communication,
The contact terminal device is:
A contact communication unit that performs human body communication with the wearing terminal device and the user as a route;
A contact communication control unit for controlling the human body communication by the contact communication unit to receive the authentication information;
A contact authentication unit that performs authentication using the received authentication information,
At least one of the wearing terminal device and the contact terminal device is an environmental power generation unit that generates at least part of electric power used for the human body communication from energy in the environment , the environmental power generation element and the environmental power generation element Including the environmental power generation unit including a power storage element that stores the generated power ,
Of the wearing communication control unit and the contact communication control unit, a communication control unit included in a terminal device including the environmental power generation unit is a mode control unit,
The energy harvesting unit outputs a trigger signal when the amount of electricity stored in the electricity storage element exceeds a predetermined amount of electricity stored,
The mode control unit switches the power saving mode to a normal mode by inputting the trigger signal, the power saving mode is a mode in which the mode control unit does not perform processing related to the human body communication, and the normal mode is the mode A human body communication system in which a mode control unit performs a process related to the human body communication. The wearing communication control unit
Causing the wearing communication unit to transmit the authentication information to the contact terminal device every predetermined time;
The contact authentication unit
The human body communication system according to claim 3, wherein authentication is performed using the received authentication information each time the contact communication unit receives the authentication information. The wearing terminal device
A wear authentication unit for performing authentication of the contact terminal device;
The contact terminal device is:
A contact storage unit that stores authentication information used for authentication of the contact terminal device;
The contact communication control unit
Controlling the human body communication by the contact communication unit, causing authentication information of the contact storage unit to be transmitted to the wearing terminal device by the human body communication,
The wearing communication control unit
Control the human body communication by the wearing communication unit, to receive the authentication information of the contact storage unit,
The wearing authentication unit
The human body communication system according to claim 3 or 4, wherein authentication is performed using the received authentication information of the contact storage unit. The human body communication system according to any one of claims 3 to 5, wherein the wearing terminal device and the contact terminal device perform the human body communication by causing a current to flow inside the user's body. A bicycle is equipped with the contact terminal device,
The energy harvesting unit of the contact terminal device includes a piezoelectric element,
The human body communication system according to any one of claims 3 to 6, wherein the piezoelectric element is located inside a pedal of the bicycle.

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