WO2006021990A1 - 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 - Google Patents
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 Download PDFInfo
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- 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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- Prior art keywords
- signal
- data
- communication device
- power supply
- data communication
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Classifications
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2004/012122 WO2006021990A1 (ja) | 2004-08-24 | 2004-08-24 | 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2004/012122 WO2006021990A1 (ja) | 2004-08-24 | 2004-08-24 | 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 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006021990A1 true WO2006021990A1 (ja) | 2006-03-02 |
Family
ID=35967213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/012122 Ceased WO2006021990A1 (ja) | 2004-08-24 | 2004-08-24 | 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 |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2006021990A1 (ja) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09171542A (ja) * | 1995-12-19 | 1997-06-30 | Tokimec Inc | 通信装置 |
| JPH1166250A (ja) * | 1997-08-27 | 1999-03-09 | Toshiba Corp | 非接触情報記録媒体を用いた情報伝送システム |
| JP2001022905A (ja) * | 1999-07-08 | 2001-01-26 | Hitachi Maxell Ltd | Icカード装置 |
| JP2004054515A (ja) * | 2002-07-18 | 2004-02-19 | Sony Corp | 無線タグシステム、リーダライタおよびデータ書込・読出方法 |
-
2004
- 2004-08-24 WO PCT/JP2004/012122 patent/WO2006021990A1/ja not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09171542A (ja) * | 1995-12-19 | 1997-06-30 | Tokimec Inc | 通信装置 |
| JPH1166250A (ja) * | 1997-08-27 | 1999-03-09 | Toshiba Corp | 非接触情報記録媒体を用いた情報伝送システム |
| JP2001022905A (ja) * | 1999-07-08 | 2001-01-26 | Hitachi Maxell Ltd | Icカード装置 |
| JP2004054515A (ja) * | 2002-07-18 | 2004-02-19 | Sony Corp | 無線タグシステム、リーダライタおよびデータ書込・読出方法 |
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