WO2006021990A1 - Data communication system, data communication apparatus, data communication method, and power transmission apparatus - Google Patents

Data communication system, data communication apparatus, data communication method, and power transmission apparatus Download PDF

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Publication number
WO2006021990A1
WO2006021990A1 PCT/JP2004/012122 JP2004012122W WO2006021990A1 WO 2006021990 A1 WO2006021990 A1 WO 2006021990A1 JP 2004012122 W JP2004012122 W JP 2004012122W WO 2006021990 A1 WO2006021990 A1 WO 2006021990A1
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WO
WIPO (PCT)
Prior art keywords
signal
data
communication device
power supply
data communication
Prior art date
Application number
PCT/JP2004/012122
Other languages
French (fr)
Japanese (ja)
Inventor
Toshihisa Kamemaru
Yasushi Takahata
Noriharu Suematsu
Yasushi Sogabe
Yoshihiko Konishi
Masataka Otsuka
Ryoji Hayashi
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to PCT/JP2004/012122 priority Critical patent/WO2006021990A1/en
Publication of WO2006021990A1 publication Critical patent/WO2006021990A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer

Definitions

  • Data communication system data communication apparatus, data communication method, and power transmission apparatus
  • the present invention relates to a power transmission device having a function of supplying power to a contactless wireless communication device (for example, a contactless IC card, RF tag, electronic tag, keyless entry), and contactless wireless communication
  • a contactless wireless communication device for example, a contactless IC card, RF tag, electronic tag, keyless entry
  • the present invention relates to a data communication system including a device and a data communication device that transmits and receives data signals.
  • a conventional data communication apparatus performs ASK modulation on an RF signal, which is a radio frequency signal, and outputs the modulated signal; and an amplifier that amplifies the modulated signal output from the ASK modulator; And an antenna that transmits the modulated signal amplified by the amplifier to a non-contact wireless communication device.
  • a modulation signal transmitted from the data communication device is used.
  • the modulation signal is rectified to obtain drive power, and the power is stored in a built-in capacitor.
  • the power stored in the capacitor is used to receive a modulation signal (data signal) from the data communication device, demodulate the data, and generate a data signal from the data addressed to the data communication device. Processing such as transmitting a signal to the data communication apparatus becomes possible (for example, see Non-Patent Document 1).
  • Non-Patent Document 1 MWE2003 Microwave Workshop Digest “Ultra-small RFID chip: Mu-chip” by Mitsuo Usami Hitachi, Ltd. Central Research Laboratory, 2003, pp. 235-pp. 238
  • the conventional data communication apparatus is configured as described above, in order to transmit / receive data signals to / from the non-contact type wireless communication device, the power supply signal is sent to the non-contact type wireless communication device before that. Must be transmitted and requires a lot of power. Therefore, lower power consumption There was a problem that it was difficult to mount it on necessary mobile phones and other mopile equipment.
  • the present invention has been made to solve the above-described problem, and transmits / receives a data signal to / from a non-contact wireless communication device without transmitting a power supply signal to the non-contact wireless communication device.
  • the present invention also provides a data communication device and a data communication method capable of transmitting data to a non-contact wireless communication device and a data that the data communication device does not transmit a power supply signal to the non-contact wireless communication device.
  • An object of the present invention is to obtain a data communication system and a power transmission device capable of transmitting and receiving signals.
  • the data communication system includes a power transmission device that transmits a power supply signal to the contactless wireless communication device when supplying power to the contactless wireless communication device.
  • the data communication apparatus transmits the data signal to the non-contact wireless communication device and receives the data signal from the non-contact wireless communication device.
  • the data communication device can transmit and receive data signals to and from the non-contact wireless communication device that transmits the power supply signal to the non-contact wireless communication device. There is an effect that power consumption can be reduced.
  • FIG. 1 is a configuration diagram showing a data communication system according to a first embodiment of the present invention.
  • FIG. 2 is a configuration diagram showing an internal configuration of a power transmission device.
  • FIG. 3 is a configuration diagram showing an internal configuration of the data communication apparatus.
  • FIG. 4 is a configuration diagram showing an internal configuration of a non-contact IC card.
  • FIG. 5 is a flowchart showing a data communication method according to the first embodiment of the present invention.
  • FIG. 6 is a configuration diagram showing an internal configuration of a data communication apparatus according to Embodiment 2 of the present invention.
  • FIG. 7 is a block diagram showing an internal configuration of a data communication apparatus according to Embodiment 3 of the present invention.
  • FIG. 8 is a configuration diagram showing a control device for a power transmission device according to Embodiment 4 of the present invention.
  • FIG. 9 is a configuration diagram showing a data communication system according to a fifth embodiment of the present invention.
  • FIG. 10 is a configuration diagram showing an internal configuration of the data communication apparatus.
  • FIG. 11 is a configuration diagram showing an internal configuration of a power transmission device.
  • FIG. 1 is a block diagram showing a data communication system according to Embodiment 1 of the present invention.
  • the power transmission device 1 is installed on, for example, a shopping mall or the ceiling of an underground mall, and when power is supplied to the contactless IC card 3 which is a contactless wireless communication device, the power supply signal is not transmitted.
  • the data communication device 2 which is a reader / writer device, is mounted on a mopile device such as a mobile phone, for example, generates a data signal when transmitting data to the non-contact IC card 3, and transmits a power supply signal from the power transmission device 1. If not, the data signal is transmitted to the contactless IC card 3 and the data signal is received from the contactless IC card 3.
  • the non-contact IC card 3 which is a non-contact wireless communication device is installed within a range in which a power supply signal transmitted from the power transmission device 1 can be received (for example, a wall of a shopping mall or an underground mall).
  • a power supply signal transmitted from the power transmission device 1 is received, the built-in capacitor is charged by the power supply signal, and thereafter, the electric charge accumulated in the capacitor is used as a power source. Then, for example, the data signal transmitted from the data communication device 2 is received and demodulated.
  • FIG. 2 is a configuration diagram showing an internal configuration of the power transmission device 1
  • FIG. 3 is a configuration diagram showing an internal configuration of the data communication device 2.
  • FIG. 4 is a block diagram showing the internal configuration of the non-contact IC card 3.
  • the memory 11 of the power transmission device 1 stores the time when the power supply signal is transmitted to the non-contact IC card 3.
  • the time notifier 12 has a function of notifying the data communication device 2 of time information stored in the memory 11 and indicating the time.
  • the power supply signal transmitter 13 transmits a power supply signal, which is an unmodulated signal, to the non-contact IC card 3 via the antenna 14.
  • the time information receiver 21 of the data communication device 2 stores the time information in the memory 22.
  • the data transmitter 23 outputs transmission data such as a command to be transmitted to the non-contact IC card 3 or standard data for response.
  • the RF signal oscillator 24 oscillates an unmodulated signal.
  • the switch 25 When the transmission data is output from the data transmitter 23, the switch 25 outputs the unmodulated signal oscillated from the RF signal oscillator 24 to the pulse modulator 26, and the data transmitter 23 outputs the standard data for the response. Then, the unmodulated signal oscillated from the RF signal oscillator 24 is output to the level adjuster 27.
  • the pulse modulator 26 performs pulse modulation (for example, ASK modulation) on the unmodulated signal oscillated from the RF signal oscillator 24 according to the transmission data output from the data transmitter 23, and outputs the modulated signal. To do.
  • pulse modulation for example, ASK modulation
  • the level adjuster 27 adjusts the peak power of the unmodulated signal oscillated from the RF signal oscillator 24 and makes the peak power of the unmodulated signal larger than the peak power of the modulated signal output from the pulse modulator 26.
  • the switching switch 28 When the transmission data is output from the data transmitter 23, the switching switch 28 outputs the modulation signal output from the pulse modulator 26 to the amplifier 29, and when the standard data for response is output from the data transmitter 23.
  • the unmodulated signal output from the level adjuster 27 is output to the amplifier 29.
  • the amplifier 29 amplifies the modulated signal or the non-modulated signal output from the switching switch 28.
  • Data from the data transmitter 23, the RF signal oscillator 24, the switching switches 25 and 28, the pulse modulator 26, and the amplifier 29 A signal generating means is configured.
  • the data transmitter 23, the RF signal oscillator 24, the switching switches 25 and 28, the level adjuster 27 and the amplifier 29 constitute response signal generating means.
  • the buffer 30 modulates the modulation amplified by the amplifier 29.
  • the signal or unmodulated signal is temporarily stored, and if the current time is a time other than the time indicated by the time information, the modulated signal or unmodulated signal is output to the circulator 31.
  • the circulator 31 outputs the modulated signal or non-modulated signal output from the buffer 30 to the antenna 32, while outputting the modulated signal received by the antenna 32 to the demodulation circuit 33. Also, the time information received by the antenna 32 is output to the time information receiving unit 21.
  • the antenna 32 transmits the modulated signal or non-modulated signal output from the buffer 30 to the non-contact IC force mode 3, while receiving the modulated signal transmitted from the non-contact IC card 3.
  • the buffer 30, the circulator 31 and the antenna 32 constitute transmission means, and the circulator 31 and the antenna 32 constitute reception means.
  • the demodulation circuit 33 demodulates the modulation signal power data received by the antenna 32.
  • the antenna 41 of the non-contact IC card 3 receives the non-modulated signal (power supply signal) transmitted from the power transmitter 1, and transmits the modulated signal (data signal) transmitted from the data communication device 2 or non-modulated. Receives modulation signal (response signal). If the received signal of the antenna 41 is a non-modulated signal (power supply signal), the charging circuit 42 rectifies the non-modulated signal to acquire driving power, and stores the driving power in the capacitor 43.
  • the modulation / demodulation circuit 44 is driven by using the electric power stored in the capacitor 43 of the charging circuit 42. If the received signal of the antenna 41 is a modulation signal (data signal), data such as a command is obtained from the modulation signal. Is demodulated and processing according to the data is performed. If the received signal of antenna 41 is an unmodulated signal (response signal), the data addressed to data communication apparatus 2 is modulated and the modulated signal is output to antenna 41.
  • FIG. 5 is a flowchart showing a data communication method according to the first embodiment of the present invention.
  • the contactless IC card 3 is not equipped with a power source such as a battery and cannot be activated unless it is supplied with power from the outside.
  • the power transmission device 1 supplies power to the non-contact IC card 3 in a non-contact state.
  • the power transmission device 1 is, for example, an unmodulated signal for supplying power. Send signal to contactless IC card 3.
  • the memory 11 of the power transmission device 1 stores in advance the time when the power supply signal is transmitted to the contactless IC card 3, and the time indicator 12 indicates the time stored in the memory 11. Regularly notify the time information.
  • the time indicator 12 periodically notifies the time information so that the time information is distributed throughout the underground shopping mall.
  • the time information receiving unit 21 stores the time information in the memory 22.
  • the power supply signal transmitter 13 of the power transmission device 1 outputs an unmodulated signal (power supply signal) of frequency f to the antenna 14 at the time stored in the memory 11.
  • the antenna 14 of the power transmitter 1 When receiving an unmodulated signal (power supply signal) having a frequency f, the antenna 14 of the power transmitter 1 transmits the unmodulated signal to the contactless IC card 3 by radiating the unmodulated signal into the air. .
  • the antenna 41 of the non-contact IC card 3 is connected to the non-contact frequency f transmitted from the power transmission device 1. Receives a modulation signal (power supply signal).
  • the charging circuit 42 of the non-contact IC card 3 rectifies the non-modulated signal to obtain driving power, The electric power is stored in the capacitor 43.
  • the data transmitter 23 of the data communication device 2 outputs the transmission data such as a command to the switching switches 25 and 28 and the pulse modulator 26 when transmitting the transmission data such as a command to the non-contact IC force mode 3. (Step ST1).
  • the RF signal oscillator 24 of the data communication device 2 oscillates an unmodulated signal having a frequency f (step by step).
  • the switching switch 25 of the data communication device 2 Upon receiving data from the data transmitter 23, the switching switch 25 of the data communication device 2 confirms whether the data is transmission data such as a command or the like, and is standard data for response (step ST3). ).
  • the switching switch 25 When the switch 25 recognizes that the data output from the data transmitter 23 is transmission data, the switching switch 25 performs pulse modulation on the unmodulated signal having the frequency f oscillated from the RF signal oscillator 24.
  • the pulse modulator 26 of the data communication device 2 Upon receiving data from the data transmitter 23, the pulse modulator 26 of the data communication device 2 confirms the force that the data is transmission data such as a command and the power is response standard data. .
  • the pulse modulator 26 When the pulse modulator 26 recognizes that the data output from the data transmitter 23 is transmission data such as a command, the pulse modulator 26 performs non-modulation of the frequency f oscillated from the RF signal oscillator 24 according to the transmission data such as the command. Pulse-modulate the signal (for example, ASK modulation)
  • the modulation signal is output to the switch 28 (step ST4).
  • the switching switch 28 of the data communication device 2 receives data from the data transmitter 23, it confirms whether the data is transmission data such as a command or the like, and is standard data for response.
  • the current time is the time indicated by the time information stored in the memory 22 (the power transmission device 1 transmits the power supply signal).
  • the modulation signal is temporarily stored (step ST7), and if the current time is a time other than the time indicated by the time information (step ST6), the modulation signal is stored. Is output to the circulator 31 (step ST8).
  • the circulator 31 of the data communication device 2 When the circulator 31 of the data communication device 2 receives the amplified modulated signal from the buffer 30, it outputs the modulated signal to the antenna 32.
  • the antenna 32 of the data communication device 2 radiates the modulated signal as a data signal in the air, thereby modulating the frequency f.
  • the antenna 41 of the contactless IC card 3 is used to change the frequency f transmitted from the data communication device 2.
  • the modulation / demodulation circuit 44 of the contactless IC card 3 modulates the received signal of the antenna 41 with the frequency f.
  • the data transmitter 23 of the data communication device 2 when receiving a data signal from the non-contact IC card 3, the data transmitter 23 of the data communication device 2 outputs standard data for response to the switching switches 25 and 28 and the pulse modulator 26 ( Step ST1).
  • the standard data for response is not intended to convey information beyond meaningful data such as a control command, for example.
  • the data should be clearly distinguishable.
  • the RF signal oscillator 24 of the data communication device 2 oscillates an unmodulated signal having a frequency f (step by step).
  • the switching switch 25 of the data communication device 2 receives data from the data transmitter 23, it confirms whether the data is transmission data such as a command and whether it is standard data for response (step). ST3).
  • the switching switch 25 When the switch 25 recognizes that the data output from the data transmitter 23 is the standard data for response, the switching switch 25 generates a non-modulated signal of frequency f oscillated from the RF signal oscillator 24.
  • the level adjuster 27 of the data communication device 2 receives the unmodulated signal having the frequency f oscillated from the RF signal oscillator 24, the level adjuster 27 adjusts the peak power of the unmodulated signal and
  • the peak power of the signal is made larger than the peak power of the modulation signal output from the pulse modulator 26 (step ST10).
  • the peak power of the unmodulated signal oscillated from the RF signal oscillator 24 is adjusted so that the peak power of the unmodulated signal for response is larger than the peak power of the modulated signal for data transmission.
  • the data switch 2 of the data communication device 2 receives data from the data transmitter 23, it confirms whether the data is transmission data such as a command and whether it is standard data for response.
  • the switch 28 When the switch 28 recognizes that the data output from the data transmitter 23 is the standard data for response, it outputs the unmodulated signal output from the level adjuster 27 to the amplifier 29.
  • the amplifier 29 of the data communication apparatus 2 receives an unmodulated signal having a frequency f from the switch 28.
  • the unmodulated signal is amplified (step ST5).
  • Step ST6 the unmodulated signal is temporarily stored (step ST7), and if the current time is a time other than the time indicated by the time information (step ST6), The modulated signal is output to the circulator 31 (step ST8).
  • the circulator 31 of the data communication apparatus 2 receives the amplified non-modulated signal from the buffer 30. When received, the unmodulated signal is output to the antenna 32.
  • the antenna 32 of the data communication device 2 When receiving the amplified unmodulated signal from the circulator 31, the antenna 32 of the data communication device 2 radiates the unmodulated signal into the air as a response signal, thereby allowing the non-modulated signal of frequency f to be contactless. 3 is transmitted (step ST9).
  • the antenna 41 of the non-contact IC card 3 is connected to the frequency f transmitted from the data communication device 2.
  • the modulation / demodulation circuit 44 of the non-contact IC card 3 has the same frequency as the received signal of the antenna 41.
  • the modulation signal of frequency f is sent from non-contact IC card 3 as a data signal.
  • the antenna 32 of the data communication device 2 receives a modulated signal having a frequency f, which is a data signal transmitted from the non-contact IC card 3.
  • the demodulation circuit 33 of the data communication device 2 demodulates the modulated signal data received by the antenna 32.
  • the power transmission device 1 that transmits a power supply signal to the non-contact IC card 3 is provided.
  • the data communication device 2 transmits the data signal to the non-contact IC card 3 and receives the data signal from the non-contact IC card 3.
  • the data communication device 2 can transmit and receive data signals to and from the contactless IC card 3 without transmitting the power supply signal to the contactless IC card 3. There is an effect that can be realized.
  • FIG. 6 is a block diagram showing the internal configuration of the data communication apparatus according to Embodiment 2 of the present invention.
  • the power supply signal receiving unit 51 receives the power supply signal transmitted from the power transmission device 1.
  • the status monitoring unit 52 monitors the reception status of the power supply signal by the power supply signal receiving unit 51 (the transmission status of the power supply signal by the power transmission device 1), and the power supply signal receiving unit 51 is for supplying power. When the signal is not received, the transmission permission of the data signal or the response signal is notified.
  • the buffer 53 temporarily stores the modulated signal or the non-modulated signal amplified by the amplifier 29 until receiving a transmission permission notification from the status monitoring unit 52, and receives a transmission permission notification from the status monitoring unit 52.
  • the modulated signal or unmodulated signal is output to the circulator 31.
  • the power supply signal receiving unit 51, the situation monitoring unit 52, the buffer 53, the circulator 31 and the antenna 32 constitute transmission means.
  • the time information stored in the memory 22 indicates the current time. It is determined whether or not it coincides with the time (the time when the power transmission device 1 transmits the power supply signal), and if it coincides, the modulated signal or the non-modulated signal is temporarily stored, and the current time If they do not match, the modulated signal or the unmodulated signal is output to the circuit 31.
  • the following may be used.
  • the power transmission device 1 transmits a power supply signal to the non-contact IC card 3 as in the first embodiment.
  • the power supply signal receiving unit 51 of the data communication device 2 receives the power supply signal transmitted from the power transmission device 1 to the contactless IC card 3.
  • the status monitoring unit 52 of the data communication device 2 monitors the transmission status of the power supply signal by the power transmission device 1 by monitoring the reception status of the power supply signal by the power supply signal receiving unit 51.
  • the status monitoring unit 52 supplies the data signal and the response signal with power.
  • the contactless IC card 3 is connected to the data signal and response signal. Since the power supply signal receiving unit 51 does not receive the power supply signal, the transmission permission of the data signal or the response signal is notified.
  • the buffer 53 of the data communication apparatus 2 temporarily stores the modulated signal or the non-modulated signal amplified by the amplifier 29 until the transmission permission notification is received from the status monitoring unit 52, and the status monitoring unit 52 When the transmission permission notification is received from, the modulated signal or non-modulated signal is output to the circulator 31.
  • the circulator 31 of the data communication apparatus 2 When receiving the amplified modulated signal or unmodulated signal from the buffer 53, the circulator 31 of the data communication apparatus 2 outputs the modulated signal or unmodulated signal to the antenna 32.
  • the antenna 32 of the data communication device 2 receives the modulated signal or the non-modulated signal after amplification from the circulator 31, the modulated signal or the non-modulated signal is radiated into the air to contact the modulated signal or the non-modulated signal without contact Send to IC card 3.
  • the transmission state of the power supply signal by the power transmission device 1 is monitored, and the power supply signal is transmitted from the power transmission device 1. If not, the data signal or the response signal is transmitted to the non-contact IC card 3 or the data signal is received from the non-contact IC card 3. Therefore, as in the first embodiment, The data communication device 2 can send and receive data signals to and from the contactless IC card 3 without transmitting the power supply signal to the contactless IC card 3, thereby reducing the power consumption of the data communication device 2. There is an effect that can be achieved.
  • the transmission status of the power supply signal by the power transmission device 1 is monitored, and when the power transmission signal is not transmitted from the power transmission device 1, the data signal or the response signal is not displayed.
  • the power transmission signal is not transmitted from the power transmission device 1 for a certain period of time or more, the power supply signal transmitted to the contact IC card 3 may be transmitted to the non-contact IC card 3.
  • the power transmission device 1 when the power supply signal receiving unit 51 of the data communication device 2 cannot receive the power supply signal transmitted from the power transmission device 1, the power transmission device 1 is installed nearby. There may be situations where the power transmission device 1 is out of order, Under these circumstances, the contactless IC card 3 cannot operate because it cannot obtain driving power.
  • the status monitoring unit 52 of the data communication device 2 performs FIG. As shown, the output request for the standard data for power supply is output to the data transmitter 23.
  • the data transmitter 23 of the data communication device 2 receives the output request of the standard data for power supply from the status monitoring unit 52, the data transmitter 23 transmits the standard data for power supply to the RF signal oscillator 24 and the switching switch 25. , 28 and the pulse modulator 26, and the transmission permission notification of the power supply signal is output to the buffer 53.
  • the RF signal oscillator 24 of the data communication device 2 oscillates an unmodulated signal having a frequency f when receiving the standard data for power supply from the data transmitter 23.
  • the switching switch 25 of the data communication device 2 receives the fixed data for power supply from the data transmitter 23, the unmodulated signal of the frequency f oscillated from the RF signal oscillator 24 is sent to the level adjuster 27. Output.
  • the level adjuster 27 of the data communication device 2 receives the unmodulated signal of the frequency f oscillated from the RF signal oscillator 24, the level adjuster 27 adjusts the peak power of the unmodulated signal and pulses the peak power of the unmodulated signal. Make it larger than the peak power of the modulation signal output from modulator 26.
  • the switching switch 28 of the data communication device 2 When the switching switch 28 of the data communication device 2 receives the standard data for power supply from the data transmitter 23, it outputs the unmodulated signal of the frequency f output from the level adjuster 27 to the amplifier 29.
  • the amplifier 29 of the data communication device 2 receives the unmodulated signal of the frequency f from the switching switch 28, the amplifier 29 amplifies the unmodulated signal.
  • the buffer 53 of the data communication apparatus 2 When the buffer 53 of the data communication apparatus 2 receives the transmission permission notification of the power supply signal and receives the unmodulated signal amplified by the amplifier 29, the buffer 53 outputs the unmodulated signal to the circuit 31.
  • the circulator 31 of the data communication device 2 receives the amplified non-modulated signal from the buffer 53. When received, the unmodulated signal is output to the antenna 32.
  • the antenna 32 of the data communication device 2 When receiving the amplified unmodulated signal from the circulator 31, the antenna 32 of the data communication device 2 radiates the power supply signal, which is the unmodulated signal, in the air, thereby transmitting the power supply signal to the contactless IC card. Send to 3.
  • the power supply signal when the power supply signal is not transmitted from the power transmission device 1 for a certain time or longer, the power supply signal is transmitted to the non-contact IC card 3.
  • the data signal can be transmitted / received to / from the non-contact IC card 3.
  • the power shown for the power transmitter 1 and the non-contact IC card 3 installed one by one
  • a large number of non-contact IC cards 3 are installed in a large underground shopping area
  • a plurality of power transmission devices 1 are also installed.
  • the power supply signal transmitted from the other power transmission device 1 since the power supply signal transmitted from the other power transmission device 1 has a low signal level, driving power cannot be obtained even if the power supply signal is rectified. It is just a reception of noise.
  • the non-contact IC card 3 receives the power supply signal from the nearby power transmission device 1. Since the power supply signal is not received from the other power transmission device 1 during a period other than the transmission period, the period during which the data signal can be transmitted and received with the data communication device 2 is maximized. The effect which can be done is produced.
  • FIG. 9 is a block diagram showing a data communication system according to the fifth embodiment of the present invention.
  • the data communication device 5 transmits a data signal or a response signal to the power transmission device 6 while receiving a data signal from the non-contact IC card 3.
  • the power transmission device 6 is installed on, for example, a shopping mall or the ceiling of an underground shopping center, and when receiving a data signal or a response signal transmitted from the data communication device 5, transmits a power supply signal to the non-contact IC card 3. Then, transfer the data signal or response signal to the contactless IC card 3.
  • FIG. 10 is a configuration diagram showing an internal configuration of the data communication device 5
  • FIG. 11 is a configuration diagram showing an internal configuration of the power transmission device 6.
  • a signal receiver 61 constitutes a signal receiving means for receiving a data signal or a response signal transmitted from the data communication device 5.
  • the signal transmitter 63 constitutes transfer means for outputting the data signal or response signal received by the signal receiver 61 to the circuit 64 after the power supply signal is output from the power supply signal transmitter 62. is doing.
  • the circulator 64 receives the power supply signal output from the power supply signal transmitter 62 or the data signal or response signal output from the signal transfer unit 63 to the antenna 65. On the other hand, the data signal or response signal received by the antenna 65 is output to the signal receiver 61.
  • the antenna 65 transmits the power supply signal, data signal, or response signal output from the circulator 64 to the contactless IC card 3, while receiving the data signal or response signal transmitted from the data communication device 5.
  • the data transmitter 23 of the data communication device 5 outputs the transmission data such as the command to the switching switches 25 and 28 and the pulse modulator 26 when transmitting the transmission data such as the command to the non-contact IC force 3.
  • the RF signal oscillator 24 of the data communication device 5 oscillates an unmodulated signal having a frequency f.
  • the switching switch 25 of the data communication device 5 confirms whether the data is transmission data such as a command and whether it is standard data for response.
  • the switching switch 25 When the switch 25 recognizes that the data output from the data transmitter 23 is transmission data, the switching switch 25 performs pulse modulation on the unmodulated signal having the frequency f oscillated from the RF signal oscillator 24.
  • the pulse modulator 26 of the data communication device 5 Upon receiving data from the data transmitter 23, the pulse modulator 26 of the data communication device 5 confirms the force that the data is transmission data such as a command and the force is response standard data. .
  • the pulse modulator 26 When the pulse modulator 26 recognizes that the data output from the data transmitter 23 is transmission data such as a command, the pulse modulator 26 performs non-modulation of the frequency f oscillated from the RF signal oscillator 24 according to the transmission data such as the command. Pulse-modulate the signal (for example, ASK modulation)
  • the modulation signal is output to the switch 28.
  • the switching switch 28 of the data communication device 5 Upon receiving data from the data transmitter 23, the switching switch 28 of the data communication device 5 confirms whether the data is transmission data such as a command or the like, and is standard data for response. When the switch 28 recognizes that the data output from the data transmitter 23 is transmission data such as a command, the switch 28 outputs the modulation signal output from the pulse modulator 26 to the amplifier 29.
  • the amplifier 29 of the data communication device 5 When receiving the modulation signal from the switching switch 28, the amplifier 29 of the data communication device 5 amplifies the modulation signal.
  • the circulator 31 of the data communication device 5 receives the amplified modulated signal from the amplifier 29, it outputs the modulated signal to the antenna 32.
  • the signal receiver 61 of the power transmission device 6 includes the frequency f transmitted from the data communication device 5.
  • the power transmitter signal transmitter 62 of the power transmitter 6 has the signal receiver 61 that changes the frequency f.
  • an unmodulated signal (power supply signal) of frequency f is output to the circulator 64.
  • the circulator 64 of the power transmitter 6 receives the frequency f from the signal transmitter 62 for power supply.
  • an unmodulated signal (power supply signal) of frequency f is output to antenna 65.
  • the antenna 65 of the power transmitter 6 When receiving an unmodulated signal (power supply signal) having a frequency f from the circulator 64, the antenna 65 of the power transmitter 6 radiates the unmodulated signal into the air, thereby causing the non-modulated signal to be contactless. Send to.
  • the antenna 41 of the non-contact IC card 3 receives the non-modulated signal (power supply signal) of the frequency f transmitted from the power transmitter 1.
  • reception signal of the antenna 41 is an unmodulated signal (power supply signal) with a frequency f
  • the charging circuit 42 of the non-contact IC card 3 rectifies the unmodulated signal to obtain driving power.
  • the driving power is stored in the capacitor 43.
  • the signal transmitter 63 of the power transmitter 6 outputs a modulated signal (data) of the frequency f received by the signal receiver 61 after the power supply signal is output from the power supply signal transmitter 62. Output to the circulator 64.
  • the circulator 64 of the power transmitter 6 receives the modulated signal of frequency f from the signal transmitter 63.
  • the modulated signal (data signal) is output to antenna 65.
  • the antenna 65 of the power transmitter 6 receives a modulated signal (de
  • the modulated signal is transmitted to the contactless IC card 3 by radiating the modulated signal into the air.
  • the antenna 41 of the non-contact IC card 3 is used to change the frequency f transmitted from the power transmitter 6.
  • the modulation / demodulation circuit 44 of the contactless IC card 3 modulates the received signal of the antenna 41 with the frequency f.
  • the data transmitter 23 of the data communication device 5 when receiving a data signal from the non-contact IC card 3, the data transmitter 23 of the data communication device 5 outputs standard data for response to the switching switches 25 and 28 and the pulse modulator 26.
  • the RF signal oscillator 24 of the data communication device 5 oscillates an unmodulated signal having a frequency f.
  • the switching switch 25 of the data communication device 5 Upon receiving data from the data transmitter 23, the switching switch 25 of the data communication device 5 confirms whether the data is transmission data such as a command and whether it is standard data for response.
  • the switching switch 25 When the switch 25 recognizes that the data output from the data transmitter 23 is the standard data for response, the switching switch 25 generates a non-modulated signal of frequency f oscillated from the RF signal oscillator 24.
  • the level adjuster 27 of the data communication device 5 receives the non-modulated signal of the frequency f oscillated from the RF signal oscillator 24, the level adjuster 27 adjusts the peak power of the non-modulated signal and
  • the data switch 23 of the data communication device 5 receives data from the data transmitter 23, it is standard data for response that the data is transmission data such as a command. Check if
  • the switch 28 When the switch 28 recognizes that the data output from the data transmitter 23 is the standard data for response, it outputs the unmodulated signal output from the level adjuster 27 to the amplifier 29.
  • the amplifier 29 of the data communication device 5 When receiving an unmodulated signal from the switch 28, the amplifier 29 of the data communication device 5 amplifies the unmodulated signal.
  • the circulator 31 of the data communication apparatus 5 When the circulator 31 of the data communication apparatus 5 receives the amplified unmodulated signal from the amplifier 29, it outputs the unmodulated signal to the antenna 32.
  • the antenna 32 of the data communication device 5 When receiving the amplified unmodulated signal from the circulator 31, the antenna 32 of the data communication device 5 radiates the unmodulated signal into the air as a response signal, thereby transmitting the unmodulated signal of frequency f to the power transmitting device 6. Send to.
  • the signal receiver 61 of the power transmission device 6 receives the frequency f transmitted from the data communication device 5.
  • the signal transmitter 62 for power supply of the power transmitter 6 has a signal receiver 61 with a frequency f.
  • the circulator 64 of the power transmitter 6 receives the frequency f from the signal transmitter 62 for power supply.
  • an unmodulated signal (power supply signal) of frequency f is output to antenna 65.
  • the antenna 65 of the power transmitter 6 When receiving an unmodulated signal (power supply signal) having a frequency f from the circulator 64, the antenna 65 of the power transmitter 6 radiates the unmodulated signal into the air, thereby causing the non-modulated signal to be contactless. Send to.
  • the antenna 41 of the non-contact IC card 3 receives the non-modulated signal (power supply signal) having the frequency f transmitted from the power transmission device 6.
  • reception signal of the antenna 41 is an unmodulated signal (power supply signal) with a frequency f
  • the charging circuit 42 of the non-contact IC card 3 rectifies the unmodulated signal to obtain driving power.
  • the driving power is stored in the capacitor 43.
  • the signal transfer unit 63 of the power transmission device 6 is supplied with power from the power supply signal transmitter 62. After the signal is output, the unmodulated signal (recorded) of frequency f received by the signal receiver 61
  • the circulator 64 of the power transmitter 6 receives an unmodulated signal of frequency f from the signal transmitter 63.
  • the response signal When the signal (response signal) is received, the response signal is output to the antenna 65.
  • the antenna 65 of the power transmitter 6 receives an unmodulated signal (frequency f) from the circulator 64.
  • the non-modulated signal is transmitted to the non-contact IC card 3 by radiating the non-modulated signal into the air.
  • the modulation / demodulation circuit 44 of the non-contact IC card 3 has the same frequency as the received signal of the antenna 41.
  • the modulation signal of frequency f is sent from non-contact IC card 3 as a data signal.
  • the antenna 32 of the data communication device 5 receives the modulation signal of the frequency f that is a data signal transmitted from the non-contact IC card 3.
  • the demodulation circuit 33 of the data communication device 5 demodulates the modulated signal data received by the antenna 32.
  • the power transmission device 6 when the power transmission device 6 receives the data signal or the response signal transmitted from the data communication device 5, the power supply signal is contactless. Since the data signal or response signal is transmitted to the non-contact IC card 3 after being transmitted to the IC card 3, the data communication device 5 must transmit the power supply signal to the non-contact IC card 3. The data signal can be transmitted / received to / from the contactless IC card 3 and the data communication device 5 can achieve low power consumption.
  • the data communication system according to the present invention is equipped with a power source such as a battery. It is suitable for use in non-contact wireless communication devices that cannot be activated unless externally supplied with power.

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Abstract

A power transmission apparatus (1) is provided which transmits a power supply signal to a noncontact IC card (3) when supplying a power to the noncontact IC card (3). While no power supply signal is transmitted from the power transmission apparatus (1), a data communication apparatus (2) transmits a data signal to the noncontact IC card (3) and receives a data signal therefrom. In this way, the data communication apparatus (2) can transmit/receive the data signals to/from the noncontact IC card (3) without transmitting any power supply signal to the noncontact IC card (3).

Description

明 細 書  Specification
データ通信システム、データ通信装置、データ通信方法及びパワー送信 装置  Data communication system, data communication apparatus, data communication method, and power transmission apparatus
技術分野  Technical field
[0001] この発明は、非接触型無線通信機器 (例えば、非接触 ICカード、 RFタグ、電子タグ 、キーレスエントリ）に電力を供給する機能を備えているパワー送信装置と、非接触型 無線通信機器とデータ信号を送受信するデータ通信装置とからなるデータ通信シス テムに関するものである。  The present invention relates to a power transmission device having a function of supplying power to a contactless wireless communication device (for example, a contactless IC card, RF tag, electronic tag, keyless entry), and contactless wireless communication The present invention relates to a data communication system including a device and a data communication device that transmits and receives data signals.
背景技術  Background art
[0002] 従来のデータ通信装置は、無線周波数信号である RF信号を ASK変調して、その 変調信号を出力する ASK変調器と、その ASK変調器から出力された変調信号を増 幅する増幅器と、その増幅器により増幅された変調信号を非接触型無線通信機器に 送信するアンテナとから構成されてレ、る。  [0002] A conventional data communication apparatus performs ASK modulation on an RF signal, which is a radio frequency signal, and outputs the modulated signal; and an amplifier that amplifies the modulated signal output from the ASK modulator; And an antenna that transmits the modulated signal amplified by the amplifier to a non-contact wireless communication device.
[0003] 非接触型無線通信機器は、近隣にデータ通信装置が設置されてレ、れば (データ通 信装置までの距離が数十センチメートル程度）、データ通信装置から送信された変 調信号 (電力供給用信号)を受信することにより、その変調信号を整流して駆動用電 力を取得し、その電力を内蔵のコンデンサに蓄積する。  [0003] When a data communication device is installed in the vicinity of a contactless wireless communication device (distance to the data communication device is about several tens of centimeters), a modulation signal transmitted from the data communication device is used. By receiving (power supply signal), the modulation signal is rectified to obtain drive power, and the power is stored in a built-in capacitor.
以後、コンデンサに蓄積した電力を利用して、データ通信装置から変調信号 (デー タ信号)を受信してデータを復調するとともに、データ通信装置宛のデータからデー タ信号を生成して、そのデータ信号をデータ通信装置に送信するなどの処理が可能 になる (例えば、非特許文献 1を参照)。  Thereafter, the power stored in the capacitor is used to receive a modulation signal (data signal) from the data communication device, demodulate the data, and generate a data signal from the data addressed to the data communication device. Processing such as transmitting a signal to the data communication apparatus becomes possible (for example, see Non-Patent Document 1).
[0004] 非特許文献 1 : MWE2003 Microwave Workshop Digest「超小型 RFIDチップ ：ミューチップ」宇佐美 光雄著 株式会社日立製作所 中央研究所 2003年発行、 第 235頁一第 238頁  [0004] Non-Patent Document 1: MWE2003 Microwave Workshop Digest “Ultra-small RFID chip: Mu-chip” by Mitsuo Usami Hitachi, Ltd. Central Research Laboratory, 2003, pp. 235-pp. 238
[0005] 従来のデータ通信装置は以上のように構成されているので、非接触型無線通信機 器とデータ信号を送受信するには、その前に電力供給用信号を非接触型無線通信 機器に送信しなければならず、多くの電力を必要とする。そのため、低消費電力化が 必要な携帯電話機などのモパイル機器に搭載することが困難であるなどの課題があ つた。 [0005] Since the conventional data communication apparatus is configured as described above, in order to transmit / receive data signals to / from the non-contact type wireless communication device, the power supply signal is sent to the non-contact type wireless communication device before that. Must be transmitted and requires a lot of power. Therefore, lower power consumption There was a problem that it was difficult to mount it on necessary mobile phones and other mopile equipment.
[0006] この発明は上記のような課題を解決するためになされたもので、電力供給用信号を 非接触型無線通信機器に送信することなぐ非接触型無線通信機器とデータ信号を 送受信することができるデータ通信装置及びデータ通信方法を得ることを目的とする また、この発明は、データ通信装置が電力供給用信号を非接触型無線通信機器に 送信することなぐ非接触型無線通信機器とデータ信号を送受信することができるデ ータ通信システム及びパワー送信装置を得ることを目的とする。  [0006] The present invention has been made to solve the above-described problem, and transmits / receives a data signal to / from a non-contact wireless communication device without transmitting a power supply signal to the non-contact wireless communication device. The present invention also provides a data communication device and a data communication method capable of transmitting data to a non-contact wireless communication device and a data that the data communication device does not transmit a power supply signal to the non-contact wireless communication device. An object of the present invention is to obtain a data communication system and a power transmission device capable of transmitting and receiving signals.
発明の開示  Disclosure of the invention
[0007] この発明に係るデータ通信システムは、非接触型無線通信機器に電力を供給する 際、電力供給用信号を非接触型無線通信機器に送信するパワー送信装置を設け、 パワー送信装置から電力供給用信号が送信されていないとき、データ通信装置がデ ータ信号を非接触型無線通信機器に送信するとともに、非接触型無線通信機器から データ信号を受信するようにしたものである。  [0007] The data communication system according to the present invention includes a power transmission device that transmits a power supply signal to the contactless wireless communication device when supplying power to the contactless wireless communication device. When the supply signal is not transmitted, the data communication apparatus transmits the data signal to the non-contact wireless communication device and receives the data signal from the non-contact wireless communication device.
[0008] このことによって、データ通信装置が電力供給用信号を非接触型無線通信機器に 送信することなぐ非接触型無線通信機器とデータ信号を送受信することができるよう になり、データ通信装置の低消費電力化を図ることができる効果がある。  [0008] Thus, the data communication device can transmit and receive data signals to and from the non-contact wireless communication device that transmits the power supply signal to the non-contact wireless communication device. There is an effect that power consumption can be reduced.
図面の簡単な説明  Brief Description of Drawings
[0009] [図 1]この発明の実施の形態 1によるデータ通信システムを示す構成図である。  FIG. 1 is a configuration diagram showing a data communication system according to a first embodiment of the present invention.
[図 2]パワー送信装置の内部構成を示す構成図である。  FIG. 2 is a configuration diagram showing an internal configuration of a power transmission device.
[図 3]データ通信装置の内部構成を示す構成図である。  FIG. 3 is a configuration diagram showing an internal configuration of the data communication apparatus.
[図 4]非接触 ICカードの内部構成を示す構成図である。  FIG. 4 is a configuration diagram showing an internal configuration of a non-contact IC card.
[図 5]この発明の実施の形態 1によるデータ通信方法を示すフローチャートである。  FIG. 5 is a flowchart showing a data communication method according to the first embodiment of the present invention.
[図 6]この発明の実施の形態 2によるデータ通信装置の内部構成を示す構成図であ る。  FIG. 6 is a configuration diagram showing an internal configuration of a data communication apparatus according to Embodiment 2 of the present invention.
[図 7]この発明の実施の形態 3によるデータ通信装置の内部構成を示す構成図であ る。 [図 8]この発明の実施の形態 4によるパワー送信装置の制御装置を示す構成図であ る。 FIG. 7 is a block diagram showing an internal configuration of a data communication apparatus according to Embodiment 3 of the present invention. FIG. 8 is a configuration diagram showing a control device for a power transmission device according to Embodiment 4 of the present invention.
[図 9]この発明の実施の形態 5によるデータ通信システムを示す構成図である。  FIG. 9 is a configuration diagram showing a data communication system according to a fifth embodiment of the present invention.
[図 10]データ通信装置の内部構成を示す構成図である。  FIG. 10 is a configuration diagram showing an internal configuration of the data communication apparatus.
[図 11]パワー送信装置の内部構成を示す構成図である。  FIG. 11 is a configuration diagram showing an internal configuration of a power transmission device.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0010] 以下、この発明をより詳細に説明するために、この発明を実施するための最良の形 態について、添付の図面に従って説明する。 Hereinafter, in order to describe the present invention in more detail, the best mode for carrying out the present invention will be described with reference to the accompanying drawings.
実施の形態 1.  Embodiment 1.
図 1はこの発明の実施の形態 1によるデータ通信システムを示す構成図である。  FIG. 1 is a block diagram showing a data communication system according to Embodiment 1 of the present invention.
[0011] 図において、パワー送信装置 1は例えばショッピングモールや地下街の天井などに 設置され、非接触型無線通信機器である非接触 ICカード 3に電力を供給する際、電 力供給用信号を非接触 ICカード 3に送信する。 [0011] In the figure, the power transmission device 1 is installed on, for example, a shopping mall or the ceiling of an underground mall, and when power is supplied to the contactless IC card 3 which is a contactless wireless communication device, the power supply signal is not transmitted. Contact Send to IC card 3.
リーダライタ装置であるデータ通信装置 2は例えば携帯電話機などのモパイル機器 に搭載され、非接触 ICカード 3にデータを送信する際にデータ信号を生成し、パワー 送信装置 1から電力供給用信号が送信されていないとき、そのデータ信号を非接触 I Cカード 3に送信するとともに、非接触 ICカード 3からデータ信号を受信する。  The data communication device 2, which is a reader / writer device, is mounted on a mopile device such as a mobile phone, for example, generates a data signal when transmitting data to the non-contact IC card 3, and transmits a power supply signal from the power transmission device 1. If not, the data signal is transmitted to the contactless IC card 3 and the data signal is received from the contactless IC card 3.
[0012] 非接触型無線通信機器である非接触 ICカード 3はパワー送信装置 1から送信され る電力供給用信号を受信することが可能な範囲内に設置され (例えば、ショッピング モールや地下街の壁などに貼り付けられる）、パワー送信装置 1から送信された電力 供給用信号を受信すると、その電力供給用信号によって内蔵のコンデンサを充電し 、以後、そのコンデンサに蓄積された電荷を電力源として利用して、例えば、データ 通信装置 2から送信されたデータ信号を受信して復調するなどの処理を実施する。 [0012] The non-contact IC card 3 which is a non-contact wireless communication device is installed within a range in which a power supply signal transmitted from the power transmission device 1 can be received (for example, a wall of a shopping mall or an underground mall). When the power supply signal transmitted from the power transmission device 1 is received, the built-in capacitor is charged by the power supply signal, and thereafter, the electric charge accumulated in the capacitor is used as a power source. Then, for example, the data signal transmitted from the data communication device 2 is received and demodulated.
[0013] 図 2はパワー送信装置 1の内部構成を示す構成図であり、図 3はデータ通信装置 2 の内部構成を示す構成図である。また、図 4は非接触 ICカード 3の内部構成を示す 構成図である。 FIG. 2 is a configuration diagram showing an internal configuration of the power transmission device 1, and FIG. 3 is a configuration diagram showing an internal configuration of the data communication device 2. FIG. 4 is a block diagram showing the internal configuration of the non-contact IC card 3.
図にぉレ、て、パワー送信装置 1のメモリ 11は電力供給用信号を非接触 ICカード 3 に送信する時刻を記憶してレ、る。 時刻報知器 12はメモリ 11に記憶されてレ、る時刻を示す時刻情報をデータ通信装 置 2に報知する機能を備えている。 As shown in the figure, the memory 11 of the power transmission device 1 stores the time when the power supply signal is transmitted to the non-contact IC card 3. The time notifier 12 has a function of notifying the data communication device 2 of time information stored in the memory 11 and indicating the time.
電力供給用信号送信器 13はメモリ 11に記憶されている時刻になると、アンテナ 14 を介して、無変調信号である電力供給用信号を非接触 ICカード 3に送信する。  When the time stored in the memory 11 is reached, the power supply signal transmitter 13 transmits a power supply signal, which is an unmodulated signal, to the non-contact IC card 3 via the antenna 14.
[0014] データ通信装置 2の時刻情報受信部 21はアンテナ 32がパワー送信装置 1の時刻 報知器 12から報知された時刻情報を受信すると、その時刻情報をメモリ 22に格納す る。 When the antenna 32 receives the time information notified from the time indicator 12 of the power transmitter 1, the time information receiver 21 of the data communication device 2 stores the time information in the memory 22.
データ送信器 23は非接触 ICカード 3に送信するコマンドなどの送信データ、あるい は、レスポンス用の定型データを出力する。 RF信号発振器 24は無変調信号を発振 する。  The data transmitter 23 outputs transmission data such as a command to be transmitted to the non-contact IC card 3 or standard data for response. The RF signal oscillator 24 oscillates an unmodulated signal.
切換スィッチ 25はデータ送信器 23から送信データが出力されると、 RF信号発振器 24から発振された無変調信号をパルス変調器 26に出力し、データ送信器 23からレ スポンス用の定型データが出力されると、 RF信号発振器 24から発振された無変調 信号をレベル調整器 27に出力する。  When the transmission data is output from the data transmitter 23, the switch 25 outputs the unmodulated signal oscillated from the RF signal oscillator 24 to the pulse modulator 26, and the data transmitter 23 outputs the standard data for the response. Then, the unmodulated signal oscillated from the RF signal oscillator 24 is output to the level adjuster 27.
[0015] パルス変調器 26はデータ送信器 23から出力された送信データに応じて、 RF信号 発振器 24から発振された無変調信号をパルス変調 (例えば、 ASK変調）して、その 変調信号を出力する。 [0015] The pulse modulator 26 performs pulse modulation (for example, ASK modulation) on the unmodulated signal oscillated from the RF signal oscillator 24 according to the transmission data output from the data transmitter 23, and outputs the modulated signal. To do.
レベル調整器 27は RF信号発振器 24から発振された無変調信号のピーク電力を 調整して、その無変調信号のピーク電力をパルス変調器 26から出力される変調信号 のピーク電力より大きくする。  The level adjuster 27 adjusts the peak power of the unmodulated signal oscillated from the RF signal oscillator 24 and makes the peak power of the unmodulated signal larger than the peak power of the modulated signal output from the pulse modulator 26.
切換スィッチ 28はデータ送信器 23から送信データが出力されると、パルス変調器 2 6から出力された変調信号を増幅器 29に出力し、データ送信器 23からレスポンス用 の定型データが出力されると、レベル調整器 27から出力された無変調信号を増幅器 29に出力する。  When the transmission data is output from the data transmitter 23, the switching switch 28 outputs the modulation signal output from the pulse modulator 26 to the amplifier 29, and when the standard data for response is output from the data transmitter 23. The unmodulated signal output from the level adjuster 27 is output to the amplifier 29.
[0016] 増幅器 29は切換スィッチ 28から出力された変調信号又は無変調信号を増幅する なお、データ送信器 23、 RF信号発振器 24、切換スィッチ 25， 28、パルス変調器 2 6及び増幅器 29からデータ信号生成手段が構成されている。 また、データ送信器 23、 RF信号発振器 24、切換スィッチ 25, 28、レベル調整器 2 7及び増幅器 29からレスポンス用信号生成手段が構成されている。 The amplifier 29 amplifies the modulated signal or the non-modulated signal output from the switching switch 28. Data from the data transmitter 23, the RF signal oscillator 24, the switching switches 25 and 28, the pulse modulator 26, and the amplifier 29 A signal generating means is configured. The data transmitter 23, the RF signal oscillator 24, the switching switches 25 and 28, the level adjuster 27 and the amplifier 29 constitute response signal generating means.
[0017] バッファ 30は現在の時刻がメモリ 22に格納されている時刻情報が示す時刻（パヮ 一送信装置 1が電力供給用信号を送信する時刻）であれば、増幅器 29により増幅さ れた変調信号又は無変調信号を一次的に格納し、現在の時刻が当該時刻情報が示 す時刻以外の時刻であれば、その変調信号又は無変調信号をサーキユレータ 31に 出力する。 If the current time is the time indicated by the time information stored in the memory 22 (the time at which the power transmission device 1 transmits the power supply signal), the buffer 30 modulates the modulation amplified by the amplifier 29. The signal or unmodulated signal is temporarily stored, and if the current time is a time other than the time indicated by the time information, the modulated signal or unmodulated signal is output to the circulator 31.
サーキユレータ 31はバッファ 30から出力された変調信号又は無変調信号をアンテ ナ 32に出力する一方、アンテナ 32により受信された変調信号を復調回路 33に出力 する。また、アンテナ 32により受信された時刻情報を時刻情報受信部 21に出力する  The circulator 31 outputs the modulated signal or non-modulated signal output from the buffer 30 to the antenna 32, while outputting the modulated signal received by the antenna 32 to the demodulation circuit 33. Also, the time information received by the antenna 32 is output to the time information receiving unit 21.
[0018] アンテナ 32はバッファ 30から出力された変調信号又は無変調信号を非接触 IC力 ード 3に送信する一方、非接触 ICカード 3から送信された変調信号を受信する。 なお、バッファ 30、サーキユレータ 31及びアンテナ 32から送信手段が構成され、サ ーキユレータ 31及びアンテナ 32から受信手段が構成されている。 The antenna 32 transmits the modulated signal or non-modulated signal output from the buffer 30 to the non-contact IC force mode 3, while receiving the modulated signal transmitted from the non-contact IC card 3. The buffer 30, the circulator 31 and the antenna 32 constitute transmission means, and the circulator 31 and the antenna 32 constitute reception means.
復調回路 33はアンテナ 32により受信された変調信号力 データを復調する。  The demodulation circuit 33 demodulates the modulation signal power data received by the antenna 32.
[0019] 非接触 ICカード 3のアンテナ 41はパワー送信装置 1から送信された無変調信号（ 電力供給用信号)を受信するとともに、データ通信装置 2から送信された変調信号（ データ信号)又は無変調信号 (レスポンス用信号)を受信する。充電回路 42はアンテ ナ 41の受信信号が無変調信号 (電力供給用信号)であれば、その無変調信号を整 流して駆動用電力を取得し、その駆動用電力をコンデンサ 43に蓄積する。  [0019] The antenna 41 of the non-contact IC card 3 receives the non-modulated signal (power supply signal) transmitted from the power transmitter 1, and transmits the modulated signal (data signal) transmitted from the data communication device 2 or non-modulated. Receives modulation signal (response signal). If the received signal of the antenna 41 is a non-modulated signal (power supply signal), the charging circuit 42 rectifies the non-modulated signal to acquire driving power, and stores the driving power in the capacitor 43.
[0020] 変復調回路 44は充電回路 42のコンデンサ 43に蓄積された電力を利用して駆動し 、アンテナ 41の受信信号が変調信号 (データ信号)であれば、その変調信号からコ マンドなどのデータを復調し、そのデータに応じた処理を実施する。また、アンテナ 4 1の受信信号が無変調信号 (レスポンス用信号)であれば、データ通信装置 2宛のデ ータを変調し、その変調信号をアンテナ 41に出力する。  The modulation / demodulation circuit 44 is driven by using the electric power stored in the capacitor 43 of the charging circuit 42. If the received signal of the antenna 41 is a modulation signal (data signal), data such as a command is obtained from the modulation signal. Is demodulated and processing according to the data is performed. If the received signal of antenna 41 is an unmodulated signal (response signal), the data addressed to data communication apparatus 2 is modulated and the modulated signal is output to antenna 41.
図 5はこの発明の実施の形態 1によるデータ通信方法を示すフローチャートである。  FIG. 5 is a flowchart showing a data communication method according to the first embodiment of the present invention.
[0021] 次に動作について説明する。 非接触 ICカード 3は、電池などの電力源を搭載しておらず、外部から電力の供給を 受けない限り、起動することができない。 Next, the operation will be described. The contactless IC card 3 is not equipped with a power source such as a battery and cannot be activated unless it is supplied with power from the outside.
そこで、データ通信装置 2がコマンドなどのデータを送信するに先立って、パワー送 信装置 1が非接触の状態で、非接触 ICカード 3に電力を供給する。  Therefore, before the data communication device 2 transmits data such as a command, the power transmission device 1 supplies power to the non-contact IC card 3 in a non-contact state.
[0022] パワー送信装置 1は、非接触 ICカード 3がデータ通信装置 2とデータ信号の送受信 を実施することができるようにするため、例えば、一定期間毎に、無変調信号である 電力供給用信号を非接触 ICカード 3に送信する。ただし、パワー送信装置 1が電力 供給用信号を非接触 ICカード 3に送信するタイミングと、データ通信装置 2がデータ 信号等を非接触 ICカード 3に送信するタイミングとが重なると、非接触 ICカード 3がデ ータ信号等を正しく受信することができないので、予め、パワー送信装置 1が電力供 給用信号を非接触 ICカード 3に送信する時刻をデータ通信装置 2に通知するように している。 [0022] In order to enable the non-contact IC card 3 to perform transmission / reception of data signals with the data communication device 2, the power transmission device 1 is, for example, an unmodulated signal for supplying power. Send signal to contactless IC card 3. However, if the timing at which the power transmission device 1 transmits a power supply signal to the contactless IC card 3 and the timing at which the data communication device 2 transmits a data signal etc. to the contactless IC card 3 overlap, the contactless IC card Since 3 cannot receive the data signal or the like correctly, it is necessary to notify the data communication device 2 in advance of the time when the power transmission device 1 transmits the power supply signal to the non-contact IC card 3. Yes.
具体的には、下記の通りである。  Specifically, it is as follows.
[0023] パワー送信装置 1のメモリ 11には、予め、電力供給用信号を非接触 ICカード 3に送 信する時刻が記憶され、時刻報知器 12がメモリ 11に記憶されている時刻を示す時 刻情報を定期的に報知する。 The memory 11 of the power transmission device 1 stores in advance the time when the power supply signal is transmitted to the contactless IC card 3, and the time indicator 12 indicates the time stored in the memory 11. Regularly notify the time information.
例えば、非接触 ICカード 3が地下街に設置されている場合、その地下街の全体に 時刻情報が行き渡るように、時刻報知器 12が定期的に報知する。  For example, when the contactless IC card 3 is installed in an underground shopping center, the time indicator 12 periodically notifies the time information so that the time information is distributed throughout the underground shopping mall.
これにより、データ通信装置 2が搭載されている携帯電話機を所持しているユーザ が地下街に進入し、データ通信装置 2のアンテナ 32がパワー送信装置 1の時刻報知 器 12から報知された時刻情報を受信すると、時刻情報受信部 21が時刻情報をメモリ 22に格納する。  As a result, a user who has a mobile phone equipped with the data communication device 2 enters the underground shopping area, and the antenna 32 of the data communication device 2 displays the time information notified from the time indicator 12 of the power transmission device 1. When received, the time information receiving unit 21 stores the time information in the memory 22.
[0024] パワー送信装置 1の電力供給用信号送信器 13は、メモリ 11に記憶されている時刻 になると、周波数 f の無変調信号 (電力供給用信号)をアンテナ 14に出力する。  [0024] The power supply signal transmitter 13 of the power transmission device 1 outputs an unmodulated signal (power supply signal) of frequency f to the antenna 14 at the time stored in the memory 11.
1  1
パワー送信装置 1のアンテナ 14は、周波数 f の無変調信号 (電力供給用信号)を 受けると、その無変調信号を空中に放射することにより、その無変調信号を非接触 IC カード 3に送信する。  When receiving an unmodulated signal (power supply signal) having a frequency f, the antenna 14 of the power transmitter 1 transmits the unmodulated signal to the contactless IC card 3 by radiating the unmodulated signal into the air. .
[0025] 非接触 ICカード 3のアンテナ 41は、パワー送信装置 1から送信された周波数 f の無 変調信号 (電力供給用信号)を受信する。 [0025] The antenna 41 of the non-contact IC card 3 is connected to the non-contact frequency f transmitted from the power transmission device 1. Receives a modulation signal (power supply signal).
非接触 ICカード 3の充電回路 42は、アンテナ 41の受信信号が周波数 の無変調 信号 (電力供給用信号)であれば、その無変調信号を整流して駆動用電力を取得し 、その駆動用電力をコンデンサ 43に蓄積する。  If the received signal of the antenna 41 is a non-modulated signal (power supply signal), the charging circuit 42 of the non-contact IC card 3 rectifies the non-modulated signal to obtain driving power, The electric power is stored in the capacitor 43.
[0026] データ通信装置 2のデータ送信器 23は、コマンドなどの送信データを非接触 IC力 ード 3に送信する場合、コマンドなどの送信データを切換スィッチ 25， 28及びパルス 変調器 26に出力する (ステップ ST1)。 [0026] The data transmitter 23 of the data communication device 2 outputs the transmission data such as a command to the switching switches 25 and 28 and the pulse modulator 26 when transmitting the transmission data such as a command to the non-contact IC force mode 3. (Step ST1).
データ通信装置 2の RF信号発振器 24は、周波数 f の無変調信号を発振する (ステ  The RF signal oscillator 24 of the data communication device 2 oscillates an unmodulated signal having a frequency f (step by step).
2  2
ップ ST2)。  ST2).
[0027] データ通信装置 2の切換スィッチ 25は、データ送信器 23からデータを受けると、そ のデータがコマンドなどの送信データであるのカ レスポンス用の定型データである のかを確認する（ステップ ST3)。  [0027] Upon receiving data from the data transmitter 23, the switching switch 25 of the data communication device 2 confirms whether the data is transmission data such as a command or the like, and is standard data for response (step ST3). ).
切換スィッチ 25は、データ送信器 23から出力されたデータが送信データであると 認定すると、 RF信号発振器 24から発振された周波数 f の無変調信号をパルス変調  When the switch 25 recognizes that the data output from the data transmitter 23 is transmission data, the switching switch 25 performs pulse modulation on the unmodulated signal having the frequency f oscillated from the RF signal oscillator 24.
2  2
器 26に出力する。  Output to device 26.
[0028] データ通信装置 2のパルス変調器 26は、データ送信器 23からデータを受けると、 そのデータがコマンドなどの送信データであるの力、レスポンス用の定型データであ るの力を確認する。  [0028] Upon receiving data from the data transmitter 23, the pulse modulator 26 of the data communication device 2 confirms the force that the data is transmission data such as a command and the power is response standard data. .
パルス変調器 26は、データ送信器 23から出力されたデータがコマンドなどの送信 データであると認定すると、そのコマンドなどの送信データに応じて、 RF信号発振器 24から発振された周波数 f の無変調信号をパルス変調 (例えば、 ASK変調）し、そ  When the pulse modulator 26 recognizes that the data output from the data transmitter 23 is transmission data such as a command, the pulse modulator 26 performs non-modulation of the frequency f oscillated from the RF signal oscillator 24 according to the transmission data such as the command. Pulse-modulate the signal (for example, ASK modulation)
2  2
の変調信号を切換スィッチ 28に出力する (ステップ ST4)。  The modulation signal is output to the switch 28 (step ST4).
[0029] データ通信装置 2の切換スィッチ 28は、データ送信器 23からデータを受けると、そ のデータがコマンドなどの送信データであるのカ レスポンス用の定型データである のかを確認する。 [0029] When the switching switch 28 of the data communication device 2 receives data from the data transmitter 23, it confirms whether the data is transmission data such as a command or the like, and is standard data for response.
切換スィッチ 28は、データ送信器 23から出力されたデータがコマンドなどの送信デ ータであると認定すると、パルス変調器 26から出力された変調信号を増幅器 29に出 力する。 [0030] データ通信装置 2の増幅器 29は、切換スィッチ 28から変調信号を受けると、その変 調信号を増幅する (ステップ ST5)。 When the switch 28 recognizes that the data output from the data transmitter 23 is transmission data such as a command, the switch 28 outputs the modulation signal output from the pulse modulator 26 to the amplifier 29. [0030] When receiving the modulation signal from the switching switch 28, the amplifier 29 of the data communication device 2 amplifies the modulation signal (step ST5).
データ通信装置 2のバッファ 30は、増幅器 29から増幅された変調信号を受けると、 現在の時刻がメモリ 22に格納されている時刻情報が示す時刻（パワー送信装置 1が 電力供給用信号を送信する時刻）と一致すれば (ステップ ST6)、その変調信号を一 次的に格納し (ステップ ST7)、現在の時刻が当該時刻情報が示す時刻以外の時刻 であれば (ステップ ST6)、その変調信号をサーキユレータ 31に出力する（ステップ S T8)。  When the buffer 30 of the data communication device 2 receives the modulated signal amplified from the amplifier 29, the current time is the time indicated by the time information stored in the memory 22 (the power transmission device 1 transmits the power supply signal). (Step ST6), the modulation signal is temporarily stored (step ST7), and if the current time is a time other than the time indicated by the time information (step ST6), the modulation signal is stored. Is output to the circulator 31 (step ST8).
[0031] データ通信装置 2のサーキユレータ 31は、バッファ 30から増幅後の変調信号を受 けると、その変調信号をアンテナ 32に出力する。  When the circulator 31 of the data communication device 2 receives the amplified modulated signal from the buffer 30, it outputs the modulated signal to the antenna 32.
データ通信装置 2のアンテナ 32は、サーキユレータ 31から増幅後の変調信号を受 けると、その変調信号をデータ信号として空中に放射することにより、周波数 f の変調  When receiving the amplified modulated signal from the circulator 31, the antenna 32 of the data communication device 2 radiates the modulated signal as a data signal in the air, thereby modulating the frequency f.
2 信号を非接触 ICカード 3に送信する (ステップ ST9)。  2 Send the signal to contactless IC card 3 (step ST9).
[0032] 非接触 ICカード 3のアンテナ 41は、データ通信装置 2から送信された周波数 f の変 [0032] The antenna 41 of the contactless IC card 3 is used to change the frequency f transmitted from the data communication device 2.
2 調信号 (データ信号)を受信する。  2 Receives a key signal (data signal).
非接触 ICカード 3の変復調回路 44は、アンテナ 41の受信信号が周波数 f の変調  The modulation / demodulation circuit 44 of the contactless IC card 3 modulates the received signal of the antenna 41 with the frequency f.
2 信号 (データ信号)であれば、充電回路 42のコンデンサ 43に蓄積された電力を利用 して駆動し、その変調信号からコマンドなどのデータを復調し、そのデータに応じた 処理を実施する。  If it is a two-signal (data signal), it is driven using the power stored in the capacitor 43 of the charging circuit 42, data such as a command is demodulated from the modulated signal, and processing according to the data is performed.
[0033] 次に、データ通信装置 2のデータ送信器 23は、非接触 ICカード 3からデータ信号 を受信する場合、レスポンス用の定型データを切換スィッチ 25， 28及びパルス変調 器 26に出力する (ステップ ST1)。  Next, when receiving a data signal from the non-contact IC card 3, the data transmitter 23 of the data communication device 2 outputs standard data for response to the switching switches 25 and 28 and the pulse modulator 26 ( Step ST1).
ここで、レスポンス用の定型データは、例えば、制御命令などの意味のあるデータ ではなぐ情報の伝達を目的とするものではないので、データの内容はいかなるもの でもよいが、コマンドなどの送信データと明確に区別できるデータであることが望まし レ、。  Here, the standard data for response is not intended to convey information beyond meaningful data such as a control command, for example. The data should be clearly distinguishable.
データ通信装置 2の RF信号発振器 24は、周波数 f の無変調信号を発振する (ステ  The RF signal oscillator 24 of the data communication device 2 oscillates an unmodulated signal having a frequency f (step by step).
2  2
ップ ST2)。 [0034] データ通信装置 2の切換スィッチ 25は、データ送信器 23からデータを受けると、そ のデータがコマンドなどの送信データであるの力、レスポンス用の定型データである のかを確認する（ステップ ST3)。 ST2). [0034] When the switching switch 25 of the data communication device 2 receives data from the data transmitter 23, it confirms whether the data is transmission data such as a command and whether it is standard data for response (step). ST3).
切換スィッチ 25は、データ送信器 23から出力されたデータがレスポンス用の定型 データであると認定すると、 RF信号発振器 24から発振された周波数 f の無変調信  When the switch 25 recognizes that the data output from the data transmitter 23 is the standard data for response, the switching switch 25 generates a non-modulated signal of frequency f oscillated from the RF signal oscillator 24.
2  2
号をレベル調整器 27に出力する。  Is output to level adjuster 27.
[0035] データ通信装置 2のレベル調整器 27は、 RF信号発振器 24から発振された周波数 f の無変調信号を受けると、その無変調信号のピーク電力を調整して、その無変調[0035] When the level adjuster 27 of the data communication device 2 receives the unmodulated signal having the frequency f oscillated from the RF signal oscillator 24, the level adjuster 27 adjusts the peak power of the unmodulated signal and
2 2
信号のピーク電力をパルス変調器 26から出力される変調信号のピーク電力より大き くする（ステップ ST10)。  The peak power of the signal is made larger than the peak power of the modulation signal output from the pulse modulator 26 (step ST10).
即ち、レスポンス用の無変調信号のピーク電力が、データ送信用の変調信号のピ ーク電力より大きくなるように、 RF信号発振器 24から発振された無変調信号のピーク 電力を調整する。  That is, the peak power of the unmodulated signal oscillated from the RF signal oscillator 24 is adjusted so that the peak power of the unmodulated signal for response is larger than the peak power of the modulated signal for data transmission.
[0036] データ通信装置 2の切換スィッチ 28は、データ送信器 23からデータを受けると、そ のデータがコマンドなどの送信データであるの力、レスポンス用の定型データである のかを確認する。  [0036] When the data switch 2 of the data communication device 2 receives data from the data transmitter 23, it confirms whether the data is transmission data such as a command and whether it is standard data for response.
切換スィッチ 28は、データ送信器 23から出力されたデータがレスポンス用の定型 データであると認定すると、レベル調整器 27から出力された無変調信号を増幅器 29 に出力する。  When the switch 28 recognizes that the data output from the data transmitter 23 is the standard data for response, it outputs the unmodulated signal output from the level adjuster 27 to the amplifier 29.
[0037] データ通信装置 2の増幅器 29は、切換スィッチ 28から周波数 f の無変調信号を受  [0037] The amplifier 29 of the data communication apparatus 2 receives an unmodulated signal having a frequency f from the switch 28.
2  2
けると、その無変調信号を増幅する (ステップ ST5)。  Then, the unmodulated signal is amplified (step ST5).
データ通信装置 2のバッファ 30は、増幅器 29から増幅された無変調信号を受ける と、現在の時刻がメモリ 22に格納されている時刻情報が示す時刻（パワー送信装置 1 が電力供給用信号を送信する時刻）と一致すれば (ステップ ST6)、その無変調信号 を一次的に格納し (ステップ ST7)、現在の時刻が当該時刻情報が示す時刻以外の 時刻であれば (ステップ ST6)、その無変調信号をサーキユレータ 31に出力する（ス テツプ ST8)。  When the buffer 30 of the data communication device 2 receives the unmodulated signal amplified from the amplifier 29, the current time is indicated by the time information stored in the memory 22 (the power transmission device 1 transmits the power supply signal). (Step ST6), the unmodulated signal is temporarily stored (step ST7), and if the current time is a time other than the time indicated by the time information (step ST6), The modulated signal is output to the circulator 31 (step ST8).
[0038] データ通信装置 2のサーキユレータ 31は、バッファ 30から増幅後の無変調信号を 受けると、その無変調信号をアンテナ 32に出力する。 [0038] The circulator 31 of the data communication apparatus 2 receives the amplified non-modulated signal from the buffer 30. When received, the unmodulated signal is output to the antenna 32.
データ通信装置 2のアンテナ 32は、サーキユレータ 31から増幅後の無変調信号を 受けると、その無変調信号をレスポンス用信号として空中に放射することにより、周波 数 f の無変調信号を非接触 ICカード 3に送信する（ステップ ST9)。  When receiving the amplified unmodulated signal from the circulator 31, the antenna 32 of the data communication device 2 radiates the unmodulated signal into the air as a response signal, thereby allowing the non-modulated signal of frequency f to be contactless. 3 is transmitted (step ST9).
2  2
[0039] 非接触 ICカード 3のアンテナ 41は、データ通信装置 2から送信された周波数 f の無  [0039] The antenna 41 of the non-contact IC card 3 is connected to the frequency f transmitted from the data communication device 2.
2 変調信号 (レスポンス用信号)を受信する。  2 Receive the modulation signal (response signal).
非接触 ICカード 3の変復調回路 44は、アンテナ 41の受信信号が周波数 f の無変  The modulation / demodulation circuit 44 of the non-contact IC card 3 has the same frequency as the received signal of the antenna 41.
2 調信号であれば、充電回路 42のコンデンサ 43に蓄積された電力を利用して駆動し、 データ通信装置 2宛のデータを変調し、周波数 f の変調信号をアンテナ 41に出力す  If it is a two-tone signal, it is driven using the electric power stored in the capacitor 43 of the charging circuit 42, modulates the data addressed to the data communication device 2, and outputs a modulated signal of frequency f to the antenna 41.
2  2
る。  The
これにより、非接触 ICカード 3から周波数 f の変調信号がデータ信号としてデータ  As a result, the modulation signal of frequency f is sent from non-contact IC card 3 as a data signal.
2  2
通信装置 2に送信される。  Sent to communication device 2.
[0040] データ通信装置 2のアンテナ 32は、非接触 ICカード 3から送信されたデータ信号で ある周波数 f の変調信号を受信する。 [0040] The antenna 32 of the data communication device 2 receives a modulated signal having a frequency f, which is a data signal transmitted from the non-contact IC card 3.
2  2
即ち、レスポンス用信号である周波数 f の無変調信号を送信しているタイミングで、  In other words, at the timing of transmitting an unmodulated signal of frequency f that is a response signal,
2  2
データ信号である周波数 f の変調信号を受信する。  Receive a modulated signal of frequency f that is a data signal.
2  2
データ通信装置 2の復調回路 33は、アンテナ 32により受信された変調信号カ デ ータを復調する。  The demodulation circuit 33 of the data communication device 2 demodulates the modulated signal data received by the antenna 32.
[0041] 以上で明らかなように、この実施の形態 1によれば、非接触 ICカード 3に電力を供 給する際、電力供給用信号を非接触 ICカード 3に送信するパワー送信装置 1を設け 、パワー送信装置 1から電力供給用信号が送信されていないとき、データ通信装置 2 がデータ信号を非接触 ICカード 3に送信するとともに、非接触 ICカード 3からデータ 信号を受信するように構成したので、データ通信装置 2が電力供給用信号を非接触 I Cカード 3に送信することなぐ非接触 ICカード 3とデータ信号を送受信することがで きるようになり、データ通信装置 2の低消費電力化を図ることができる効果を奏する。  As apparent from the above, according to the first embodiment, when power is supplied to the non-contact IC card 3, the power transmission device 1 that transmits a power supply signal to the non-contact IC card 3 is provided. Provided when the power transmission device 1 does not transmit a power supply signal, the data communication device 2 transmits the data signal to the non-contact IC card 3 and receives the data signal from the non-contact IC card 3. As a result, the data communication device 2 can transmit and receive data signals to and from the contactless IC card 3 without transmitting the power supply signal to the contactless IC card 3. There is an effect that can be realized.
[0042] 実施の形態 2.  [0042] Embodiment 2.
図 6はこの発明の実施の形態 2によるデータ通信装置の内部構成を示す構成図で ある。図において、図 3と同一符号は同一または相当部分を示すので説明を省略す る。 FIG. 6 is a block diagram showing the internal configuration of the data communication apparatus according to Embodiment 2 of the present invention. In the figure, the same reference numerals as those in FIG. The
電力供給用信号受信部 51はパワー送信装置 1から送信される電力供給用信号を 受信する。  The power supply signal receiving unit 51 receives the power supply signal transmitted from the power transmission device 1.
状況監視部 52は電力供給用信号受信部 51による電力供給用信号の受信状況（ パワー送信装置 1による電力供給用信号の送信状況)を監視し、電力供給用信号受 信部 51が電力供給用信号を受信していないとき、データ信号又はレスポンス用信号 の送信許可を通知する。  The status monitoring unit 52 monitors the reception status of the power supply signal by the power supply signal receiving unit 51 (the transmission status of the power supply signal by the power transmission device 1), and the power supply signal receiving unit 51 is for supplying power. When the signal is not received, the transmission permission of the data signal or the response signal is notified.
[0043] バッファ 53は状況監視部 52から送信許可通知を受けるまでの間、増幅器 29により 増幅された変調信号又は無変調信号を一次的に格納し、状況監視部 52から送信許 可通知を受けると、その変調信号又は無変調信号をサーキユレータ 31に出力する。 なお、電力供給用信号受信部 51、状況監視部 52、バッファ 53、サーキユレータ 31 及びアンテナ 32から送信手段が構成されている。  [0043] The buffer 53 temporarily stores the modulated signal or the non-modulated signal amplified by the amplifier 29 until receiving a transmission permission notification from the status monitoring unit 52, and receives a transmission permission notification from the status monitoring unit 52. The modulated signal or unmodulated signal is output to the circulator 31. The power supply signal receiving unit 51, the situation monitoring unit 52, the buffer 53, the circulator 31 and the antenna 32 constitute transmission means.
[0044] 上記実施の形態 1では、データ通信装置 2のバッファ 30が増幅器 29から増幅され た変調信号又は無変調信号を受けると、現在の時刻がメモリ 22に格納されている時 刻情報が示す時刻 (パワー送信装置 1が電力供給用信号を送信する時刻）と一致す るか否かを判定し、一致していれば、その変調信号又は無変調信号を一次的に格納 し、現在の時刻が一致していなければ、その変調信号又は無変調信号をサーキユレ ータ 31に出力するものについて示したが、次のようにしてもよい。  In the first embodiment, when the buffer 30 of the data communication apparatus 2 receives the modulated signal or the non-modulated signal amplified from the amplifier 29, the time information stored in the memory 22 indicates the current time. It is determined whether or not it coincides with the time (the time when the power transmission device 1 transmits the power supply signal), and if it coincides, the modulated signal or the non-modulated signal is temporarily stored, and the current time If they do not match, the modulated signal or the unmodulated signal is output to the circuit 31. However, the following may be used.
[0045] 即ち、パワー送信装置 1は、非接触 ICカード 3に電力を供給する際、上記実施の形 態 1と同様に、電力供給用信号を非接触 ICカード 3に送信する。  That is, when power is supplied to the non-contact IC card 3, the power transmission device 1 transmits a power supply signal to the non-contact IC card 3 as in the first embodiment.
データ通信装置 2の電力供給用信号受信部 51は、パワー送信装置 1から非接触 I Cカード 3宛に送信された電力供給用信号を受信する。  The power supply signal receiving unit 51 of the data communication device 2 receives the power supply signal transmitted from the power transmission device 1 to the contactless IC card 3.
データ通信装置 2の状況監視部 52は、電力供給用信号受信部 51による電力供給 用信号の受信状況を監視することにより、パワー送信装置 1による電力供給用信号 の送信状況を監視する。  The status monitoring unit 52 of the data communication device 2 monitors the transmission status of the power supply signal by the power transmission device 1 by monitoring the reception status of the power supply signal by the power supply signal receiving unit 51.
[0046] 状況監視部 52は、電力供給用信号受信部 51が電力供給用信号を受信していると き、データ信号やレスポンス用信号の送信を許可すると、データ信号やレスポンス用 信号が電力供給用信号と重なり、非接触 ICカード 3がデータ信号やレスポンス用信 号を受信することができないので、電力供給用信号受信部 51が電力供給用信号を 受信していないとき、データ信号又はレスポンス用信号の送信許可を通知する。 [0046] When the power supply signal receiving unit 51 receives the power supply signal and the transmission of the data signal and the response signal is permitted, the status monitoring unit 52 supplies the data signal and the response signal with power. The contactless IC card 3 is connected to the data signal and response signal. Since the power supply signal receiving unit 51 does not receive the power supply signal, the transmission permission of the data signal or the response signal is notified.
[0047] データ通信装置 2のバッファ 53は、状況監視部 52から送信許可通知を受けるまで の間、増幅器 29により増幅された変調信号又は無変調信号を一次的に格納し、状 況監視部 52から送信許可通知を受けると、その変調信号又は無変調信号をサーキ ユレータ 31に出力する。  [0047] The buffer 53 of the data communication apparatus 2 temporarily stores the modulated signal or the non-modulated signal amplified by the amplifier 29 until the transmission permission notification is received from the status monitoring unit 52, and the status monitoring unit 52 When the transmission permission notification is received from, the modulated signal or non-modulated signal is output to the circulator 31.
データ通信装置 2のサーキユレータ 31は、バッファ 53から増幅後の変調信号又は 無変調信号を受けると、その変調信号又は無変調信号をアンテナ 32に出力する。 データ通信装置 2のアンテナ 32は、サーキユレータ 31から増幅後の変調信号又は 無変調信号を受けると、その変調信号又は無変調信号を空中に放射することにより、 その変調信号又は無変調信号を非接触 ICカード 3に送信する。  When receiving the amplified modulated signal or unmodulated signal from the buffer 53, the circulator 31 of the data communication apparatus 2 outputs the modulated signal or unmodulated signal to the antenna 32. When the antenna 32 of the data communication device 2 receives the modulated signal or the non-modulated signal after amplification from the circulator 31, the modulated signal or the non-modulated signal is radiated into the air to contact the modulated signal or the non-modulated signal without contact Send to IC card 3.
以下、上記実施の形態 1と同様であるため説明を省略する。  Hereinafter, the description is omitted because it is the same as that of the first embodiment.
[0048] 以上で明らかなように、この実施の形態 2によれば、パワー送信装置 1による電力供 給用信号の送信状況を監視し、そのパワー送信装置 1から電力供給用信号が送信さ れていないとき、データ信号又はレスポンス用信号を非接触 ICカード 3に送信し、あ るいは、非接触 ICカード 3からデータ信号を受信するように構成したので、上記実施 の形態 1と同様に、データ通信装置 2が電力供給用信号を非接触 ICカード 3に送信 することなぐ非接触 ICカード 3とデータ信号を送受信することができるようになり、デ ータ通信装置 2の低消費電力化を図ることができる効果を奏する。  As is apparent from the above, according to the second embodiment, the transmission state of the power supply signal by the power transmission device 1 is monitored, and the power supply signal is transmitted from the power transmission device 1. If not, the data signal or the response signal is transmitted to the non-contact IC card 3 or the data signal is received from the non-contact IC card 3. Therefore, as in the first embodiment, The data communication device 2 can send and receive data signals to and from the contactless IC card 3 without transmitting the power supply signal to the contactless IC card 3, thereby reducing the power consumption of the data communication device 2. There is an effect that can be achieved.
[0049] 実施の形態 3.  [0049] Embodiment 3.
上記実施の形態 2では、パワー送信装置 1による電力供給用信号の送信状況を監 視し、そのパワー送信装置 1から電力供給用信号が送信されていないとき、データ信 号又はレスポンス用信号を非接触 ICカード 3に送信するものについて示した力 一定 時間以上、パワー送信装置 1から電力供給用信号が送信されない場合、電力供給 用信号を非接触 ICカード 3に送信するようにしてもよい。  In Embodiment 2 described above, the transmission status of the power supply signal by the power transmission device 1 is monitored, and when the power transmission signal is not transmitted from the power transmission device 1, the data signal or the response signal is not displayed. When the power transmission signal is not transmitted from the power transmission device 1 for a certain period of time or more, the power supply signal transmitted to the contact IC card 3 may be transmitted to the non-contact IC card 3.
[0050] 即ち、データ通信装置 2の電力供給用信号受信部 51が、パワー送信装置 1から送 信される電力供給用信号を受信することができない場合、パワー送信装置 1が近くに 設置されていないことや、パワー送信装置 1が故障しているなどの状況が考えられ、 これらの状況下では、非接触 ICカード 3が駆動用の電力を得られず動作することが できない。 That is, when the power supply signal receiving unit 51 of the data communication device 2 cannot receive the power supply signal transmitted from the power transmission device 1, the power transmission device 1 is installed nearby. There may be situations where the power transmission device 1 is out of order, Under these circumstances, the contactless IC card 3 cannot operate because it cannot obtain driving power.
そこで、データ通信装置 2の電力供給用信号受信部 51がー定時間以上、パワー送 信装置 1から電力供給用信号を受信することができない場合、データ通信装置 2の 状況監視部 52が図 7に示すように、電力供給用の定型データの出力要求をデータ 送信器 23に出力する。  Therefore, when the power supply signal receiving unit 51 of the data communication device 2 cannot receive the power supply signal from the power transmission device 1 for a predetermined time or longer, the status monitoring unit 52 of the data communication device 2 performs FIG. As shown, the output request for the standard data for power supply is output to the data transmitter 23.
[0051] データ通信装置 2のデータ送信器 23は、状況監視部 52から電力供給用の定型デ ータの出力要求を受けると、電力供給用の定型データを RF信号発振器 24、切換ス イッチ 25， 28及びパルス変調器 26に出力するとともに、電力供給用信号の送信許 可通知をバッファ 53に出力する。  [0051] When the data transmitter 23 of the data communication device 2 receives the output request of the standard data for power supply from the status monitoring unit 52, the data transmitter 23 transmits the standard data for power supply to the RF signal oscillator 24 and the switching switch 25. , 28 and the pulse modulator 26, and the transmission permission notification of the power supply signal is output to the buffer 53.
データ通信装置 2の RF信号発振器 24は、データ送信器 23から電力供給用の定 型データを受けると、周波数 f の無変調信号を発振する。  The RF signal oscillator 24 of the data communication device 2 oscillates an unmodulated signal having a frequency f when receiving the standard data for power supply from the data transmitter 23.
[0052] データ通信装置 2の切換スィッチ 25は、データ送信器 23から電力供給用の定型デ ータを受けると、 RF信号発振器 24から発振された周波数 f の無変調信号をレベル 調整器 27に出力する。  [0052] When the switching switch 25 of the data communication device 2 receives the fixed data for power supply from the data transmitter 23, the unmodulated signal of the frequency f oscillated from the RF signal oscillator 24 is sent to the level adjuster 27. Output.
データ通信装置 2のレベル調整器 27は、 RF信号発振器 24から発振された周波数 f の無変調信号を受けると、その無変調信号のピーク電力を調整して、その無変調 信号のピーク電力をパルス変調器 26から出力される変調信号のピーク電力より大き くする。  When the level adjuster 27 of the data communication device 2 receives the unmodulated signal of the frequency f oscillated from the RF signal oscillator 24, the level adjuster 27 adjusts the peak power of the unmodulated signal and pulses the peak power of the unmodulated signal. Make it larger than the peak power of the modulation signal output from modulator 26.
データ通信装置 2の切換スィッチ 28は、データ送信器 23から電力供給用の定型デ ータを受けると、レベル調整器 27から出力された周波数 f の無変調信号を増幅器 29 に出力する。  When the switching switch 28 of the data communication device 2 receives the standard data for power supply from the data transmitter 23, it outputs the unmodulated signal of the frequency f output from the level adjuster 27 to the amplifier 29.
[0053] データ通信装置 2の増幅器 29は、切換スィッチ 28から周波数 f の無変調信号を受 けると、その無変調信号を増幅する。  [0053] When the amplifier 29 of the data communication device 2 receives the unmodulated signal of the frequency f from the switching switch 28, the amplifier 29 amplifies the unmodulated signal.
データ通信装置 2のバッファ 53は、電力供給用信号の送信許可通知を受け、かつ 、増幅器 29により増幅された無変調信号を受けると、その無変調信号をサーキユレ ータ 31に出力する。  When the buffer 53 of the data communication apparatus 2 receives the transmission permission notification of the power supply signal and receives the unmodulated signal amplified by the amplifier 29, the buffer 53 outputs the unmodulated signal to the circuit 31.
データ通信装置 2のサーキユレータ 31は、バッファ 53から増幅後の無変調信号を 受けると、その無変調信号をアンテナ 32に出力する。 The circulator 31 of the data communication device 2 receives the amplified non-modulated signal from the buffer 53. When received, the unmodulated signal is output to the antenna 32.
データ通信装置 2のアンテナ 32は、サーキユレータ 31から増幅後の無変調信号を 受けると、その無変調信号である電力供給用信号を空中に放射することにより、その 電力供給用信号を非接触 ICカード 3に送信する。  When receiving the amplified unmodulated signal from the circulator 31, the antenna 32 of the data communication device 2 radiates the power supply signal, which is the unmodulated signal, in the air, thereby transmitting the power supply signal to the contactless IC card. Send to 3.
以下、上記実施の形態 2と同様であるため説明を省略する。  The description below is omitted because it is the same as that of the second embodiment.
[0054] 以上で明らかなように、この実施の形態 3によれば、一定時間以上、パワー送信装 置 1から電力供給用信号が送信されない場合、電力供給用信号を非接触 ICカード 3 に送信するように構成したので、パワー送信装置 1から電力供給用信号が送信され ない状況下にあっても、非接触 ICカード 3とデータ信号を送受信することができる効 果を奏する。 As apparent from the above, according to the third embodiment, when the power supply signal is not transmitted from the power transmission device 1 for a certain time or longer, the power supply signal is transmitted to the non-contact IC card 3. Thus, even if the power transmission device 1 does not transmit the power supply signal, the data signal can be transmitted / received to / from the non-contact IC card 3.
[0055] 実施の形態 4. [0055] Embodiment 4.
上記実施の形態 1一 3では、パワー送信装置 1と非接触 ICカード 3が 1台ずつ設置 されているものについて示した力 例えば、大きな地下街に多数の非接触 ICカード 3 が設置される場合、通常、パワー送信装置 1も複数台設置される。  In the above Embodiments 1 to 3, the power shown for the power transmitter 1 and the non-contact IC card 3 installed one by one For example, when a large number of non-contact IC cards 3 are installed in a large underground shopping area, Usually, a plurality of power transmission devices 1 are also installed.
複数のパワー送信装置 1が設置される場合において、複数のパワー送信装置 1が 非同期に電力供給用信号を送信すると、非接触 ICカード 3が近接のパワー送信装 置 1から電力供給用信号を受信するほかに、他のパワー送信装置 1 (遠方のパワー 送信装置 1)からも電力供給用信号を受信することになる。  When multiple power transmitters 1 are installed, if multiple power transmitters 1 transmit power supply signals asynchronously, the non-contact IC card 3 receives the power supply signal from the adjacent power transmitter 1 In addition, the power supply signal is also received from another power transmission device 1 (distant power transmission device 1).
[0056] ただし、他のパワー送信装置 1から送信される電力供給用信号は信号レベルが低 レ、ため、その電力供給用信号を整流しても駆動用の電力を取得することができず、 単なる雑音を受信したに過ぎないものになる。 However, since the power supply signal transmitted from the other power transmission device 1 has a low signal level, driving power cannot be obtained even if the power supply signal is rectified. It is just a reception of noise.
他のパワー送信装置 1から送信される電力供給用信号を受信している間は、雑音 を受信していることになるので、データ通信装置 2とのデータ信号の送受信が困難に なり、データ通信装置 2とデータ信号を送受信することが可能な期間が短くなる。  While receiving the power supply signal transmitted from the other power transmission device 1, noise is received. Therefore, transmission / reception of the data signal to / from the data communication device 2 becomes difficult, and data communication is performed. The period during which data signals can be transmitted / received to / from device 2 is shortened.
[0057] そこで、この実施の形態 4では、図 8に示すように、パワー送信装置 1における電力 供給用信号の送信を制御する制御装置 4を設置し、制御装置 4が複数のパワー送信 装置 1における電力供給用信号の送信タイミングを一致させるようにする。 Therefore, in the fourth embodiment, as shown in FIG. 8, a control device 4 that controls transmission of a power supply signal in the power transmission device 1 is installed, and the control device 4 includes a plurality of power transmission devices 1. The transmission timings of the power supply signals in are matched.
これにより、非接触 ICカード 3が近接のパワー送信装置 1から電力供給用信号を受 信している期間以外の期間中に、他のパワー送信装置 1から電力供給用信号を受信 することがなくなるので、データ通信装置 2とデータ信号を送受信することが可能な期 間を最大限長くすることができる効果を奏する。 As a result, the non-contact IC card 3 receives the power supply signal from the nearby power transmission device 1. Since the power supply signal is not received from the other power transmission device 1 during a period other than the transmission period, the period during which the data signal can be transmitted and received with the data communication device 2 is maximized. The effect which can be done is produced.
[0058] なお、この実施の形態 4では、制御装置 4が複数のパワー送信装置 1における電力 供給用信号の送信タイミングを制御するものについて示したが、複数のパワー送信 装置 1のメモリ 11に同一時刻を格納して、複数のパワー送信装置 1が同一時刻に電 力供給用信号を送信するようにしてもよい。 In the fourth embodiment, the control device 4 controls the transmission timing of the power supply signal in the plurality of power transmission devices 1, but is the same as the memory 11 of the plurality of power transmission devices 1. The time may be stored, and a plurality of power transmission devices 1 may transmit power supply signals at the same time.
[0059] 実施の形態 5. [0059] Embodiment 5.
図 9はこの発明の実施の形態 5によるデータ通信システムを示す構成図である。図 において、図 1と同一符号は同一または相当部分を示すので説明を省略する。 データ通信装置 5はデータ信号又はレスポンス用信号をパワー送信装置 6に送信 する一方、非接触 ICカード 3からデータ信号を受信する。  FIG. 9 is a block diagram showing a data communication system according to the fifth embodiment of the present invention. In the figure, the same reference numerals as those in FIG. The data communication device 5 transmits a data signal or a response signal to the power transmission device 6 while receiving a data signal from the non-contact IC card 3.
パワー送信装置 6は例えばショッピングモールや地下街の天井などに設置され、デ ータ通信装置 5から送信されたデータ信号又はレスポンス用信号を受信すると、電力 供給用信号を非接触 ICカード 3に送信してから、そのデータ信号又はレスポンス用 信号を非接触 ICカード 3に転送する。  The power transmission device 6 is installed on, for example, a shopping mall or the ceiling of an underground shopping center, and when receiving a data signal or a response signal transmitted from the data communication device 5, transmits a power supply signal to the non-contact IC card 3. Then, transfer the data signal or response signal to the contactless IC card 3.
[0060] 図 10はデータ通信装置 5の内部構成を示す構成図であり、図 11はパワー送信装 置 6の内部構成を示す構成図である。 FIG. 10 is a configuration diagram showing an internal configuration of the data communication device 5, and FIG. 11 is a configuration diagram showing an internal configuration of the power transmission device 6.
図において、信号受信器 61はデータ通信装置 5から送信されたデータ信号又はレ スポンス用信号を受信する信号受信手段を構成している。  In the figure, a signal receiver 61 constitutes a signal receiving means for receiving a data signal or a response signal transmitted from the data communication device 5.
電力供給用信号送信器 62は信号受信器 61がデータ信号又はレスポンス用信号を 受信すると、電力供給用信号をサーキユレータ 64に出力する電力供給用信号送信 手段を構成している。  The power supply signal transmitter 62 constitutes a power supply signal transmission means for outputting a power supply signal to the circulator 64 when the signal receiver 61 receives a data signal or a response signal.
信号転送器 63は電力供給用信号送信器 62から電力供給用信号が出力されたの ち、信号受信器 61により受信されたデータ信号又はレスポンス用信号をサーキユレ ータ 64に出力する転送手段を構成している。  The signal transmitter 63 constitutes transfer means for outputting the data signal or response signal received by the signal receiver 61 to the circuit 64 after the power supply signal is output from the power supply signal transmitter 62. is doing.
[0061] サーキユレータ 64は電力供給用信号送信器 62から出力された電力供給用信号又 は信号転送器 63から出力されたデータ信号又はレスポンス用信号をアンテナ 65に 出力する一方、アンテナ 65により受信されたデータ信号又はレスポンス用信号を信 号受信器 61に出力する。 The circulator 64 receives the power supply signal output from the power supply signal transmitter 62 or the data signal or response signal output from the signal transfer unit 63 to the antenna 65. On the other hand, the data signal or response signal received by the antenna 65 is output to the signal receiver 61.
アンテナ 65はサーキユレータ 64から出力された電力供給用信号、データ信号又は レスポンス用信号を非接触 ICカード 3に送信する一方、データ通信装置 5から送信さ れたデータ信号又はレスポンス用信号を受信する。  The antenna 65 transmits the power supply signal, data signal, or response signal output from the circulator 64 to the contactless IC card 3, while receiving the data signal or response signal transmitted from the data communication device 5.
なお、サーキユレータ 64及びアンテナ 65は、信号受信手段、電力供給用信号送信 手段及び転送手段を構成してレ、る。  The circulator 64 and the antenna 65 constitute signal receiving means, power supply signal transmitting means and transfer means.
[0062] 次に動作について説明する。 Next, the operation will be described.
データ通信装置 5のデータ送信器 23は、コマンドなどの送信データを非接触 IC力 ード 3に送信する場合、コマンドなどの送信データを切換スィッチ 25， 28及びパルス 変調器 26に出力する。  The data transmitter 23 of the data communication device 5 outputs the transmission data such as the command to the switching switches 25 and 28 and the pulse modulator 26 when transmitting the transmission data such as the command to the non-contact IC force 3.
データ通信装置 5の RF信号発振器 24は、周波数 f の無変調信号を発振する。  The RF signal oscillator 24 of the data communication device 5 oscillates an unmodulated signal having a frequency f.
2  2
[0063] データ通信装置 5の切換スィッチ 25は、データ送信器 23からデータを受けると、そ のデータがコマンドなどの送信データであるの力、レスポンス用の定型データである のかを確認する。  [0063] When receiving data from the data transmitter 23, the switching switch 25 of the data communication device 5 confirms whether the data is transmission data such as a command and whether it is standard data for response.
切換スィッチ 25は、データ送信器 23から出力されたデータが送信データであると 認定すると、 RF信号発振器 24から発振された周波数 f の無変調信号をパルス変調  When the switch 25 recognizes that the data output from the data transmitter 23 is transmission data, the switching switch 25 performs pulse modulation on the unmodulated signal having the frequency f oscillated from the RF signal oscillator 24.
2  2
器 26に出力する。  Output to device 26.
[0064] データ通信装置 5のパルス変調器 26は、データ送信器 23からデータを受けると、 そのデータがコマンドなどの送信データであるの力、レスポンス用の定型データであ るの力を確認する。  [0064] Upon receiving data from the data transmitter 23, the pulse modulator 26 of the data communication device 5 confirms the force that the data is transmission data such as a command and the force is response standard data. .
パルス変調器 26は、データ送信器 23から出力されたデータがコマンドなどの送信 データであると認定すると、そのコマンドなどの送信データに応じて、 RF信号発振器 24から発振された周波数 f の無変調信号をパルス変調 (例えば、 ASK変調）し、そ  When the pulse modulator 26 recognizes that the data output from the data transmitter 23 is transmission data such as a command, the pulse modulator 26 performs non-modulation of the frequency f oscillated from the RF signal oscillator 24 according to the transmission data such as the command. Pulse-modulate the signal (for example, ASK modulation)
2  2
の変調信号を切換スィッチ 28に出力する。  The modulation signal is output to the switch 28.
[0065] データ通信装置 5の切換スィッチ 28は、データ送信器 23からデータを受けると、そ のデータがコマンドなどの送信データであるのカ レスポンス用の定型データである のかを確認する。 切換スィッチ 28は、データ送信器 23から出力されたデータがコマンドなどの送信デ ータであると認定すると、パルス変調器 26から出力された変調信号を増幅器 29に出 力する。 [0065] Upon receiving data from the data transmitter 23, the switching switch 28 of the data communication device 5 confirms whether the data is transmission data such as a command or the like, and is standard data for response. When the switch 28 recognizes that the data output from the data transmitter 23 is transmission data such as a command, the switch 28 outputs the modulation signal output from the pulse modulator 26 to the amplifier 29.
データ通信装置 5の増幅器 29は、切換スィッチ 28から変調信号を受けると、その変 調信号を増幅する。  When receiving the modulation signal from the switching switch 28, the amplifier 29 of the data communication device 5 amplifies the modulation signal.
[0066] データ通信装置 5のサーキユレータ 31は、増幅器 29から増幅後の変調信号を受け ると、その変調信号をアンテナ 32に出力する。  [0066] When the circulator 31 of the data communication device 5 receives the amplified modulated signal from the amplifier 29, it outputs the modulated signal to the antenna 32.
データ通信装置 5のアンテナ 32は、サーキユレータ 31から増幅後の変調信号を受 けると、その変調信号をデータ信号として空中に放射することにより、周波数 f の変調  When receiving the amplified modulated signal from the circulator 31, the antenna 32 of the data communication device 5 radiates the modulated signal into the air as a data signal, thereby modulating the frequency f.
2 信号をパワー送信装置 6に送信する。  2 Transmit the signal to the power transmitter 6.
[0067] パワー送信装置 6の信号受信器 61は、データ通信装置 5から送信された周波数 f [0067] The signal receiver 61 of the power transmission device 6 includes the frequency f transmitted from the data communication device 5.
2 の変調信号 (データ信号)を受信する。  2 Modulation signal (data signal) is received.
パワー送信装置 6の電力供給用信号送信器 62は、信号受信器 61が周波数 f の変  The power transmitter signal transmitter 62 of the power transmitter 6 has the signal receiver 61 that changes the frequency f.
2 調信号 (データ信号)を受信すると、周波数 f の無変調信号 (電力供給用信号)をサ ーキユレータ 64に出力する。  When a bi-level signal (data signal) is received, an unmodulated signal (power supply signal) of frequency f is output to the circulator 64.
パワー送信装置 6のサーキユレータ 64は、電力供給用信号送信器 62から周波数 f  The circulator 64 of the power transmitter 6 receives the frequency f from the signal transmitter 62 for power supply.
1 の無変調信号 (電力供給用信号)を受けると、周波数 f の無変調信号 (電力供給用 信号）をアンテナ 65に出力する。  When 1 unmodulated signal (power supply signal) is received, an unmodulated signal (power supply signal) of frequency f is output to antenna 65.
パワー送信装置 6のアンテナ 65は、サーキユレータ 64から周波数 f の無変調信号（ 電力供給用信号)を受けると、その無変調信号を空中に放射することにより、その無 変調信号を非接触 ICカード 3に送信する。  When receiving an unmodulated signal (power supply signal) having a frequency f from the circulator 64, the antenna 65 of the power transmitter 6 radiates the unmodulated signal into the air, thereby causing the non-modulated signal to be contactless. Send to.
[0068] 非接触 ICカード 3のアンテナ 41は、パワー送信装置 1から送信された周波数 f の無 変調信号 (電力供給用信号)を受信する。 [0068] The antenna 41 of the non-contact IC card 3 receives the non-modulated signal (power supply signal) of the frequency f transmitted from the power transmitter 1.
非接触 ICカード 3の充電回路 42は、アンテナ 41の受信信号が周波数 f の無変調 信号 (電力供給用信号)であれば、その無変調信号を整流して駆動用電力を取得し If the reception signal of the antenna 41 is an unmodulated signal (power supply signal) with a frequency f, the charging circuit 42 of the non-contact IC card 3 rectifies the unmodulated signal to obtain driving power.
、その駆動用電力をコンデンサ 43に蓄積する。 The driving power is stored in the capacitor 43.
[0069] パワー送信装置 6の信号転送器 63は、電力供給用信号送信器 62から電力供給用 信号が出力されたのち、信号受信器 61により受信された周波数 f の変調信号 (デー タ信号）をサーキユレータ 64に出力する。 [0069] The signal transmitter 63 of the power transmitter 6 outputs a modulated signal (data) of the frequency f received by the signal receiver 61 after the power supply signal is output from the power supply signal transmitter 62. Output to the circulator 64.
パワー送信装置 6のサーキユレータ 64は、信号転送器 63から周波数 f の変調信号  The circulator 64 of the power transmitter 6 receives the modulated signal of frequency f from the signal transmitter 63.
2  2
(データ信号)を受けると、その変調信号 (データ信号)をアンテナ 65に出力する。 パワー送信装置 6のアンテナ 65は、サーキユレータ 64から周波数 f の変調信号（デ  When (data signal) is received, the modulated signal (data signal) is output to antenna 65. The antenna 65 of the power transmitter 6 receives a modulated signal (de
2  2
ータ信号)を受けると、その変調信号を空中に放射することにより、その変調信号を非 接触 ICカード 3に送信する。  The modulated signal is transmitted to the contactless IC card 3 by radiating the modulated signal into the air.
[0070] 非接触 ICカード 3のアンテナ 41は、パワー送信装置 6から送信された周波数 f の変 [0070] The antenna 41 of the non-contact IC card 3 is used to change the frequency f transmitted from the power transmitter 6.
2 調信号 (データ信号)を受信する。  2 Receives a key signal (data signal).
非接触 ICカード 3の変復調回路 44は、アンテナ 41の受信信号が周波数 f の変調  The modulation / demodulation circuit 44 of the contactless IC card 3 modulates the received signal of the antenna 41 with the frequency f.
2 信号 (データ信号)であれば、充電回路 42のコンデンサ 43に蓄積された電力を利用 して駆動し、その変調信号力 コマンドなどのデータを復調し、そのデータに応じた 処理を実施する。  If it is a two-signal (data signal), it is driven using the power stored in the capacitor 43 of the charging circuit 42, the data such as the modulation signal force command is demodulated, and processing according to the data is performed.
[0071] 次に、データ通信装置 5のデータ送信器 23は、非接触 ICカード 3からデータ信号 を受信する場合、レスポンス用の定型データを切換スィッチ 25， 28及びパルス変調 器 26に出力する。  Next, when receiving a data signal from the non-contact IC card 3, the data transmitter 23 of the data communication device 5 outputs standard data for response to the switching switches 25 and 28 and the pulse modulator 26.
データ通信装置 5の RF信号発振器 24は、周波数 f の無変調信号を発振する。  The RF signal oscillator 24 of the data communication device 5 oscillates an unmodulated signal having a frequency f.
2  2
[0072] データ通信装置 5の切換スィッチ 25は、データ送信器 23からデータを受けると、そ のデータがコマンドなどの送信データであるの力、レスポンス用の定型データである のかを確認する。  [0072] Upon receiving data from the data transmitter 23, the switching switch 25 of the data communication device 5 confirms whether the data is transmission data such as a command and whether it is standard data for response.
切換スィッチ 25は、データ送信器 23から出力されたデータがレスポンス用の定型 データであると認定すると、 RF信号発振器 24から発振された周波数 f の無変調信  When the switch 25 recognizes that the data output from the data transmitter 23 is the standard data for response, the switching switch 25 generates a non-modulated signal of frequency f oscillated from the RF signal oscillator 24.
2  2
号をレベル調整器 27に出力する。  Is output to level adjuster 27.
データ通信装置 5のレベル調整器 27は、 RF信号発振器 24から発振された周波数 f の無変調信号を受けると、その無変調信号のピーク電力を調整して、その無変調 When the level adjuster 27 of the data communication device 5 receives the non-modulated signal of the frequency f oscillated from the RF signal oscillator 24, the level adjuster 27 adjusts the peak power of the non-modulated signal and
2 2
信号のピーク電力をパルス変調器 26から出力される変調信号のピーク電力より大き くする。  Make the peak power of the signal larger than the peak power of the modulation signal output from the pulse modulator 26.
[0073] データ通信装置 5の切換スィッチ 28は、データ送信器 23からデータを受けると、そ のデータがコマンドなどの送信データであるのカ レスポンス用の定型データである のかを確認する。 [0073] When the data switch 23 of the data communication device 5 receives data from the data transmitter 23, it is standard data for response that the data is transmission data such as a command. Check if
切換スィッチ 28は、データ送信器 23から出力されたデータがレスポンス用の定型 データであると認定すると、レベル調整器 27から出力された無変調信号を増幅器 29 に出力する。  When the switch 28 recognizes that the data output from the data transmitter 23 is the standard data for response, it outputs the unmodulated signal output from the level adjuster 27 to the amplifier 29.
データ通信装置 5の増幅器 29は、切換スィッチ 28から無変調信号を受けると、その 無変調信号を増幅する。  When receiving an unmodulated signal from the switch 28, the amplifier 29 of the data communication device 5 amplifies the unmodulated signal.
[0074] データ通信装置 5のサーキユレータ 31は、増幅器 29から増幅後の無変調信号を受 けると、その無変調信号をアンテナ 32に出力する。 When the circulator 31 of the data communication apparatus 5 receives the amplified unmodulated signal from the amplifier 29, it outputs the unmodulated signal to the antenna 32.
データ通信装置 5のアンテナ 32は、サーキユレータ 31から増幅後の無変調信号を 受けると、その無変調信号をレスポンス用信号として空中に放射することにより、周波 数 f の無変調信号をパワー送信装置 6に送信する。  When receiving the amplified unmodulated signal from the circulator 31, the antenna 32 of the data communication device 5 radiates the unmodulated signal into the air as a response signal, thereby transmitting the unmodulated signal of frequency f to the power transmitting device 6. Send to.
2  2
[0075] パワー送信装置 6の信号受信器 61は、データ通信装置 5から送信された周波数 f  [0075] The signal receiver 61 of the power transmission device 6 receives the frequency f transmitted from the data communication device 5.
2 の無変調信号 (レスポンス用信号)を受信する。  2 Unmodulated signal (response signal) is received.
パワー送信装置 6の電力供給用信号送信器 62は、信号受信器 61が周波数 f の無  The signal transmitter 62 for power supply of the power transmitter 6 has a signal receiver 61 with a frequency f.
2 変調信号 (レスポンス用信号)を受信すると、周波数 f の無変調信号 (電力供給用信  2 When a modulated signal (response signal) is received, an unmodulated signal with frequency f (power supply signal)
1  1
号）をサーキユレータ 64に出力する。  Is output to the circulator 64.
パワー送信装置 6のサーキユレータ 64は、電力供給用信号送信器 62から周波数 f  The circulator 64 of the power transmitter 6 receives the frequency f from the signal transmitter 62 for power supply.
1 の無変調信号 (電力供給用信号)を受けると、周波数 f の無変調信号 (電力供給用 信号）をアンテナ 65に出力する。  When 1 unmodulated signal (power supply signal) is received, an unmodulated signal (power supply signal) of frequency f is output to antenna 65.
パワー送信装置 6のアンテナ 65は、サーキユレータ 64から周波数 f の無変調信号（ 電力供給用信号)を受けると、その無変調信号を空中に放射することにより、その無 変調信号を非接触 ICカード 3に送信する。  When receiving an unmodulated signal (power supply signal) having a frequency f from the circulator 64, the antenna 65 of the power transmitter 6 radiates the unmodulated signal into the air, thereby causing the non-modulated signal to be contactless. Send to.
[0076] 非接触 ICカード 3のアンテナ 41は、パワー送信装置 6から送信された周波数 f の無 変調信号 (電力供給用信号)を受信する。 The antenna 41 of the non-contact IC card 3 receives the non-modulated signal (power supply signal) having the frequency f transmitted from the power transmission device 6.
非接触 ICカード 3の充電回路 42は、アンテナ 41の受信信号が周波数 f の無変調 信号 (電力供給用信号)であれば、その無変調信号を整流して駆動用電力を取得し If the reception signal of the antenna 41 is an unmodulated signal (power supply signal) with a frequency f, the charging circuit 42 of the non-contact IC card 3 rectifies the unmodulated signal to obtain driving power.
、その駆動用電力をコンデンサ 43に蓄積する。 The driving power is stored in the capacitor 43.
[0077] パワー送信装置 6の信号転送器 63は、電力供給用信号送信器 62から電力供給用 信号が出力されたのち、信号受信器 61により受信された周波数 f の無変調信号 (レ [0077] The signal transfer unit 63 of the power transmission device 6 is supplied with power from the power supply signal transmitter 62. After the signal is output, the unmodulated signal (recorded) of frequency f received by the signal receiver 61
2  2
スポンス用信号）をサーキユレータ 64に出力する。  (Sponsoring signal) is output to the circulator 64.
パワー送信装置 6のサーキユレータ 64は、信号転送器 63から周波数 f の無変調信  The circulator 64 of the power transmitter 6 receives an unmodulated signal of frequency f from the signal transmitter 63.
2  2
号（レスポンス用信号)を受けると、そのレスポンス用信号をアンテナ 65に出力する。 パワー送信装置 6のアンテナ 65は、サーキユレータ 64から周波数 f の無変調信号（  When the signal (response signal) is received, the response signal is output to the antenna 65. The antenna 65 of the power transmitter 6 receives an unmodulated signal (frequency f) from the circulator 64.
2  2
レスポンス用信号)を受けると、その無変調信号を空中に放射することにより、その無 変調信号を非接触 ICカード 3に送信する。  When the response signal is received, the non-modulated signal is transmitted to the non-contact IC card 3 by radiating the non-modulated signal into the air.
[0078] 非接触 ICカード 3のアンテナ 41は、データ通信装置 5から送信された周波数 f の無 [0078] The antenna 41 of the non-contact IC card 3 is connected to the non-contact of the frequency f transmitted from the data communication device 5.
2 変調信号 (レスポンス用信号)を受信する。  2 Receive the modulation signal (response signal).
非接触 ICカード 3の変復調回路 44は、アンテナ 41の受信信号が周波数 f の無変  The modulation / demodulation circuit 44 of the non-contact IC card 3 has the same frequency as the received signal of the antenna 41.
2 調信号であれば、充電回路 42のコンデンサ 43に蓄積された電力を利用して駆動し、 データ通信装置 5宛のデータを変調し、周波数 f の変調信号をアンテナ 41に出力す  If it is a two-tone signal, it is driven using the power stored in the capacitor 43 of the charging circuit 42, modulates the data addressed to the data communication device 5, and outputs a modulated signal of frequency f to the antenna 41.
2  2
る。  The
これにより、非接触 ICカード 3から周波数 f の変調信号がデータ信号としてデータ  As a result, the modulation signal of frequency f is sent from non-contact IC card 3 as a data signal.
2  2
通信装置 5に送信される。  Sent to communication device 5.
[0079] データ通信装置 5のアンテナ 32は、非接触 ICカード 3から送信されたデータ信号で ある周波数 f の変調信号を受信する。 [0079] The antenna 32 of the data communication device 5 receives the modulation signal of the frequency f that is a data signal transmitted from the non-contact IC card 3.
2  2
データ通信装置 5の復調回路 33は、アンテナ 32により受信された変調信号カ デ ータを復調する。  The demodulation circuit 33 of the data communication device 5 demodulates the modulated signal data received by the antenna 32.
[0080] 以上で明らかなように、この実施の形態 5によれば、パワー送信装置 6がデータ通 信装置 5から送信されたデータ信号又はレスポンス用信号を受信すると、電力供給 用信号を非接触 ICカード 3に送信してから、そのデータ信号又はレスポンス用信号を 非接触 ICカード 3に転送するように構成したので、データ通信装置 5が電力供給用 信号を非接触 ICカード 3に送信することなぐ非接触 ICカード 3とデータ信号を送受 信することができるようになり、データ通信装置 5の低消費電力化を図ることができる 効果を奏する。  As apparent from the above, according to the fifth embodiment, when the power transmission device 6 receives the data signal or the response signal transmitted from the data communication device 5, the power supply signal is contactless. Since the data signal or response signal is transmitted to the non-contact IC card 3 after being transmitted to the IC card 3, the data communication device 5 must transmit the power supply signal to the non-contact IC card 3. The data signal can be transmitted / received to / from the contactless IC card 3 and the data communication device 5 can achieve low power consumption.
産業上の利用可能性  Industrial applicability
[0081] 以上のように、この発明に係るデータ通信システムは、電池などの電力源を搭載し ておらず、外部から電力の供給を受けない限り、起動することができない非接触型無 線通信機器などに用いるのに適してレ、る。 [0081] As described above, the data communication system according to the present invention is equipped with a power source such as a battery. It is suitable for use in non-contact wireless communication devices that cannot be activated unless externally supplied with power.

Claims

請求の範囲 The scope of the claims
[1] 非接触型無線通信機器に電力を供給する際、電力供給用信号を上記非接触型無 線通信機器に送信するパワー送信装置と、上記非接触型無線通信機器にデータを 送信する際にデータ信号を生成し、上記パワー送信装置から電力供給用信号が送 信されていないとき、そのデータ信号を上記非接触型無線通信機器に送信するとと もに、上記非接触型無線通信機器からデータ信号を受信するデータ通信装置とを備 えたデータ通信システム。  [1] When supplying power to a non-contact wireless communication device, a power transmission device that transmits a power supply signal to the non-contact wireless communication device, and when transmitting data to the non-contact wireless communication device When a power supply signal is not transmitted from the power transmission device, the data signal is transmitted to the non-contact wireless communication device and the non-contact wireless communication device. A data communication system comprising a data communication device for receiving a data signal.
[2] データ通信装置は、予めパワー送信装置から電力供給用信号が送信される時刻を 認識し、その時刻以外の時刻にデータ信号を送受信することを特徴とする請求項 1 記載のデータ通信システム。  2. The data communication system according to claim 1, wherein the data communication device recognizes in advance the time at which the power supply signal is transmitted from the power transmission device and transmits / receives the data signal at a time other than that time. .
[3] データ通信装置は、パワー送信装置による電力供給用信号の送信状況を監視し、 そのパワー送信装置力 電力供給用信号が送信されていないとき、データ信号を送 受信することを特徴とする請求項 1記載のデータ通信システム。  [3] The data communication device monitors the transmission status of the power supply signal by the power transmission device, and transmits and receives the data signal when the power transmission device power supply signal is not transmitted. The data communication system according to claim 1.
[4] データ通信装置は、一定時間以上、パワー送信装置から電力供給用信号が送信さ れない場合、電力供給用信号を非接触型無線通信機器に送信することを特徴とする 請求項 3記載のデータ通信システム。  [4] The data communication device transmits the power supply signal to the non-contact wireless communication device when the power transmission signal is not transmitted from the power transmission device for a certain time or longer. Data communication system.
[5] 複数のパワー送信装置が設置される場合、複数のパワー送信装置は同時に電力 供給用信号を送信することを特徴とする請求項 1記載のデータ通信システム。  5. The data communication system according to claim 1, wherein when a plurality of power transmission devices are installed, the plurality of power transmission devices simultaneously transmit power supply signals.
[6] 非接触型無線通信機器にデータを送信する際にデータ信号を生成し、そのデータ 信号を送信するとともに、上記非接触型無線通信機器からデータ信号を受信するデ ータ通信装置と、上記データ通信装置から送信されたデータ信号を受信すると、電 力供給用信号を上記非接触型無線通信機器に送信してから、そのデータ信号を上 記非接触型無線通信機器に転送するパワー送信装置とを備えたデータ通信システ ム。  [6] A data communication device that generates a data signal when transmitting data to the contactless wireless communication device, transmits the data signal, and receives the data signal from the contactless wireless communication device; When a data signal transmitted from the data communication device is received, a power transmission signal is transmitted to the contactless wireless communication device after the power supply signal is transmitted to the contactless wireless communication device. A data communication system equipped with a device.
[7] 非接触型無線通信機器にデータを送信する際にデータ信号を生成するデータ信 号生成手段と、上記非接触型無線通信機器力 データ信号を受信する際にレスボン ス用信号を生成するレスポンス用信号生成手段と、パワー送信装置から電力供給用 信号が送信されていないとき、上記データ信号生成手段により生成されたデータ信 号又は上記レスポンス用信号生成手段により生成されたレスポンス用信号を送信す る送信手段と、上記送信手段によりレスポンス用信号が送信されているとき、上記非 接触型無線通信機器からデータ信号を受信する受信手段とを備えたデータ通信装 置。 [7] Data signal generating means for generating a data signal when data is transmitted to the non-contact type wireless communication device, and a response signal when receiving the non-contact type wireless communication device power data signal. When the power supply signal is not transmitted from the response signal generation means and the power transmission device, the data signal generated by the data signal generation means is generated. Or a response signal generated by the response signal generator, and a data signal is received from the contactless wireless communication device when the response signal is transmitted by the transmitter. A data communication device comprising a receiving means.
[8] 非接触型無線通信機器にデータを送信する際にデータ信号を生成する一方、上 記非接触型無線通信機器からデータ信号を受信する際にレスポンス用信号を生成 し、パワー送信装置から電力供給用信号が送信されていないとき、そのデータ信号 又はレスポンス用信号を送信し、そのレスポンス用信号を送信しているとき、上記非 接触型無線通信機器からデータ信号を受信するデータ通信方法。  [8] While a data signal is generated when data is transmitted to the non-contact type wireless communication device, a response signal is generated when the data signal is received from the non-contact type wireless communication device. A data communication method for transmitting a data signal or a response signal when a power supply signal is not transmitted, and receiving a data signal from the non-contact wireless communication device when transmitting the response signal.
[9] データ通信装置から送信されたデータ信号又はレスポンス用信号を受信する信号 受信手段と、上記信号受信手段がデータ信号又はレスポンス用信号を受信すると、 電力供給用信号を非接触型無線通信機器に送信する電力供給用信号送信手段と 、上記電力供給用信号送信手段により電力供給用信号が送信されたのち、上記信 号受信手段により受信されたデータ信号又はレスポンス用信号を上記非接触型無線 通信機器に転送する転送手段とを備えたパワー送信装置。  [9] A signal receiving unit that receives a data signal or a response signal transmitted from the data communication device; and when the signal receiving unit receives the data signal or the response signal, the power supply signal is transmitted to the contactless wireless communication device. Power supply signal transmitting means for transmitting to the power supply signal transmitting means, and after the power supply signal is transmitted by the power supply signal transmitting means, the data signal or response signal received by the signal receiving means is transmitted to the non-contact wireless A power transmission device comprising transfer means for transferring to a communication device.
PCT/JP2004/012122 2004-08-24 2004-08-24 Data communication system, data communication apparatus, data communication method, and power transmission apparatus WO2006021990A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09171542A (en) * 1995-12-19 1997-06-30 Tokimec Inc Communication equipment
JPH1166250A (en) * 1997-08-27 1999-03-09 Toshiba Corp Information transmission system using non-contact information recording medium
JP2001022905A (en) * 1999-07-08 2001-01-26 Hitachi Maxell Ltd Ic card apparatus
JP2004054515A (en) * 2002-07-18 2004-02-19 Sony Corp Radio tag system, reader/writer and data writing/reading method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09171542A (en) * 1995-12-19 1997-06-30 Tokimec Inc Communication equipment
JPH1166250A (en) * 1997-08-27 1999-03-09 Toshiba Corp Information transmission system using non-contact information recording medium
JP2001022905A (en) * 1999-07-08 2001-01-26 Hitachi Maxell Ltd Ic card apparatus
JP2004054515A (en) * 2002-07-18 2004-02-19 Sony Corp Radio tag system, reader/writer and data writing/reading method

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