WO2006011233A1 - データ通信装置及びデータ通信方法 - Google Patents
データ通信装置及びデータ通信方法 Download PDFInfo
- Publication number
- WO2006011233A1 WO2006011233A1 PCT/JP2004/010960 JP2004010960W WO2006011233A1 WO 2006011233 A1 WO2006011233 A1 WO 2006011233A1 JP 2004010960 W JP2004010960 W JP 2004010960W WO 2006011233 A1 WO2006011233 A1 WO 2006011233A1
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- WO
- WIPO (PCT)
- Prior art keywords
- signal
- data
- frequency
- power supply
- communication device
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
Definitions
- the present invention relates to a data communication apparatus and a data communication method having a function of supplying power to a contactless wireless communication device (for example, contactless IC card, RF tag, electronic tag, keyless entry). is there.
- a contactless wireless communication device for example, contactless IC card, RF tag, electronic tag, keyless entry.
- 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 modulation signal output from the ASK modulator power And an antenna that transmits the modulated signal amplified by the amplifier to a non-contact wireless communication device.
- the amplifier amplifies the modulation signal so that the average power of the modulation signal transmitted from the antenna becomes constant.
- the non-contact type wireless communication device charges the built-in capacitor with the modulation signal (for example, refer to Non-Patent Document 1).
- the capacitor of the contactless wireless communication device can be charged by transmitting the modulation signal. it can.
- the peak power of the modulation signal transmitted from the antenna is not increased, so if the distance to the contactless wireless communication device is increased, the modulation signal Even if is transmitted, the capacitor of the non-contact wireless communication device cannot be charged.
- Non-Patent Document 1 MWE2003 Microwave Workshop Digest "Ultra-small RFID chip: Mu-chip” by Mitsuo Usami Hitachi, Ltd. Central Research Laboratories, 2003, pp. 235, 238
- the conventional data communication device is configured as described above, if the power of the modulation signal when charging the capacitor of the non-contact type radio communication device is increased, it is possible to reach the non-contact type radio communication device. Capacitors for non-contact wireless communication devices can be charged even when the distance is long. However, when another data communication device is installed in the vicinity, if the modulation signal power is increased when charging the capacitor of the non-contact wireless communication device, the modulation signal reaches the other data communication device. Therefore, there was a problem that could interfere with communication of other data communication devices.
- the present invention has been made to solve the above-described problems, and increases the chargeable distance to a non-contact wireless communication device that does not impede communication with other data communication devices.
- An object of the present invention is to obtain a data communication apparatus and a data communication method capable of performing the above. Disclosure of the invention
- the data communication device generates a data signal when transmitting data to the non-contact wireless communication device, while supplying power to the non-contact wireless communication device.
- FIG. 1 is a configuration diagram showing a data communication apparatus according to Embodiment 1 of the present invention.
- FIG. 2 is a flowchart showing a data communication method according to the first embodiment of the present invention.
- FIG. 3 is an explanatory diagram showing a cell arrangement according to the first embodiment of the present invention.
- FIG. 4 is an explanatory diagram showing the relationship between frequency and power.
- FIG. 5 is an explanatory diagram showing the amplitude of a transmission signal.
- FIG. 6 is a block diagram showing a data communication apparatus according to Embodiment 2 of the present invention.
- FIG. 7 is a block diagram showing a data communication apparatus according to Embodiment 3 of the present invention.
- FIG. 8 is a flowchart showing a data communication method according to Embodiment 3 of the present invention.
- FIG. 9 is an explanatory diagram showing the peak power of a transmission signal.
- FIG. 10 is a block diagram showing a data communication apparatus according to Embodiment 4 of the present invention.
- FIG. 1 is a configuration diagram showing a data communication apparatus according to Embodiment 1 of the present invention.
- the data communication apparatus 1 corresponds to, for example, a reader / writer apparatus, and an unmodulated signal for power supply, or Then, send the modulated signal as transmission data to the contactless IC card 2 as a transmission signal.
- the non-contact IC card 2 which is a non-contact type wireless communication device receives a non-modulated signal for power supply transmitted from the data communication device 1
- the built-in capacitor is charged by the signal, and thereafter the capacitor is charged to the capacitor.
- processing such as demodulation of a modulation signal that is transmission data transmitted from the data communication device 1 is performed.
- the data transmitter 11 of the data communication device 1 outputs transmission data such as a command to be transmitted to the contactless IC card 2 and fixed data for power supply.
- the RF signal oscillator 12 which is a radio frequency signal oscillator, has no modulation of the frequency f (first frequency) when the data output from the data transmitter 11 is transmission data such as a command.
- the pulse modulator 13 performs pulse modulation (for example, ASK modulation) on the non-modulated signal oscillated from the RF signal oscillator 12 in accordance with the data output from the data transmitter 11, and outputs it.
- the pulse modulator 13 pulse-modulates an unmodulated signal corresponding to the data and outputs it as a transmission signal, and outputs from the data transmitter 11
- the received data is standard data for power supply
- the non-modulated signal from the RF signal oscillator 12 is output as a transmission signal.
- the data transmitter 11, the RF signal oscillator 12, and the pulse modulator 13 constitute a signal generating means.
- the amplifier 14 When the data output from the data transmitter 11 is transmission data such as a command, the amplifier 14 amplifies the modulated signal output from the pulse modulator 13 with the first amplification factor, and the data transmitter 11 When the data output from is a standard data for power supply, the unmodulated signal output from the pulse modulator 13 is amplified with the second amplification factor (first amplification factor ⁇ second amplification factor). Thus, the peak power of the unmodulated signal is increased.
- the antenna 15 transmits the transmission signal amplified by the amplifier 14 to the non-contact IC card 2
- the antenna 15 constitutes transmission means.
- the antenna 21 of the non-contact IC card 2 receives a transmission signal transmitted from the data communication device 1 as a reception signal.
- the charging circuit 22 charges the capacitor 23 with the received signal received by the antenna 21.
- the demodulation circuit 24 performs processing such as demodulating the reception signal received from the transmission signal transmitted from the data communication device 1 using the electric charge stored in the capacitor 23 of the charging circuit 22 as a power source.
- FIG. 2 is a flowchart showing a data communication method according to the first embodiment of the present invention.
- the contactless IC card 2 is not equipped with a power source such as a battery, and cannot be activated unless it receives external power.
- the data transmitter 11 of the data communication device 1 outputs the standard data for power supply to the RF signal oscillator 12, the pulse modulator 13 and the amplifier 14 before outputting transmission data such as a command. (Step ST1).
- the standard data for power supply is not intended to convey information other than meaningful data such as control commands, for example, so the data content may be anything, but transmission data such as commands It is desirable that the data be clearly distinguishable from the data.
- step ST2 When the RF signal oscillator 12 of the data communication device 1 receives data from the data transmitter 11, It is confirmed whether the data is transmission data such as power, command, etc. (step ST2).
- the RF signal oscillator 12 When the RF signal oscillator 12 recognizes that the data output from the data transmitter 11 is standard data for power supply, the RF signal oscillator 12 oscillates an unmodulated signal having a frequency f (step ST3).
- interference may be caused by signals transmitted from other data communication devices 1.
- Different frequencies are assigned to each other.
- the data communication device 1 to which the frequencies of f 1, f 2 and f are assigned.
- the frequency of the modulation signal for data transmission and the frequency of the non-modulation signal for power supply are normally set to be the same as each other in the data communication device 1, as described later, If the power of the unmodulated pulse signal for power supply that slides the chargeable distance to the card 2 is increased, the unmodulated signal reaches the other data communication device 1 even if there is some distance, and the signal Interference occurs.
- the frequency f, f, f differs from the frequency f of the modulation signal for data transmission.
- the frequency f 1 2 3 is assigned to the unmodulated signal for power supply. Therefore, the electric
- the pulse modulator 13 of the data communication device 1 Upon receipt of data from the data transmitter 11, the pulse modulator 13 of the data communication device 1 confirms whether the data is the standard data for power supply and whether the data is transmission data such as a command. .
- the pulse modulator 13 determines that the data output from the data transmitter 11 is standard data for power supply, the pulse modulator 13 generates a non-modulated signal of frequency f oscillated from the RF signal oscillator 12.
- the signal is output to the amplifier 14 as a transmission signal.
- the amplifier 14 of the data communication device 1 receives the transmission signal from the pulse modulator 13, the power ⁇ command that the data output from the data transmitter 11 is the standard data for power supply. Check whether the transmission data is.
- the amplifier 14 When the amplifier 14 recognizes that the data output by the data transmitter 11 is the standard data for power supply, the amplifier 14 amplifies the transmission signal output from the pulse modulator 13 by the second amplification factor (step ST4). .
- the power supply signal output from the amplifier 14 is Peak power becomes extremely large.
- the antenna 15 of the data communication device 1 Upon receiving the amplified transmission signal from the amplifier 14, the antenna 15 of the data communication device 1 transmits the transmission signal to the contactless IC card 2 by radiating the transmission signal into the air (step ST5 ).
- the antenna 21 of the non-contact IC card 2 is connected to the frequency f transmitted from the data communication device 1.
- the charging circuit 22 of the contactless IC card 2 is such that the antenna 21 receives an unmodulated signal having a frequency f.
- the data transmitter 11 of the data communication apparatus 1 transmits an unmodulated signal having the frequency f from the antenna 15 as described above, the data transmitter 11 transmits the transmission data such as a command to the RF signal oscillator 12, the filter.
- the RF signal oscillator 12 of the data communication device 1 confirms whether the data is transmission data such as power, command, etc. Step ST2).
- the RF signal oscillator 12 When the RF signal oscillator 12 recognizes that the data output from the data transmitter 11 is transmission data such as a command, the RF signal oscillator 12 assigns an unmodulated signal of, for example, a frequency f assigned in advance.
- the pulse modulator 13 of the data communication apparatus 1 Upon receiving data from the data transmitter 11, the pulse modulator 13 of the data communication apparatus 1 confirms whether the data is the standard data for power supply and whether the data is transmission data such as a command. .
- the pulse modulator 13 When the pulse modulator 13 recognizes that the data output from the data transmitter 11 is transmission data such as a command, the pulse modulator 13 generates an RF signal oscillator according to the transmission data such as the command.
- the non-modulated signal of the frequency oscillated from 12 is subjected to pulse modulation (for example, ASK modulation), and the modulated signal is output to the amplifier 14 as a transmission signal.
- pulse modulation for example, ASK modulation
- the data output from the data transmitter 11 is transmission data such as a power ⁇ command that is the standard data for power supply. Check if it is.
- the amplifier 14 When the amplifier 14 recognizes that the data output from the data transmitter 11 is transmission data such as a command, the amplifier 14 amplifies the modulated signal output from the pulse modulator 13 with the first amplification factor (step ST8).
- the first amplification factor is smaller than the second amplification factor in the case of standard data for power supply, as shown in FIG.
- the antenna 15 of the data communication device 1 transmits the transmission signal to the non-contact IC card 2 by radiating the transmission signal into the air (step ST5). ).
- the antenna 21 of the non-contact IC card 2 receives the transmission signal of the frequency f transmitted from the data communication device 1 as a reception signal.
- the demodulation circuit 24 of the non-contact IC card 2 performs processing such as demodulating the received signal of the frequency f received by the antenna 21 by using the electric charge stored in the capacitor 23 of the charging circuit 22 as a power source. To do.
- the modulated signal for data transmission is
- the pulse modulator 13, and the amplifier 14 receive data from the data transmitter 11, whether the data is standard data for power supply, a command, etc. I showed you what to check to see if it ’s sent data.
- a control signal indicating whether the data transmitter 11 is a standard data for power supply or transmission data such as a command to the RF signal oscillator 12, the pulse modulator 13 and the amplifier 14, the RF signal oscillator 12 oscillates an unmodulated signal of frequency or frequency f according to the control signal, and the amplifier 14 performs first or second increase according to the control signal.
- FIG. 6 is a block diagram showing a data communication apparatus according to Embodiment 2 of the present invention.
- the RF signal oscillator 16 which is a radio frequency signal oscillator oscillates an unmodulated signal having a frequency f
- the RF signal oscillator 17 oscillates an unmodulated signal having a frequency f.
- the switching switch 18 pulses an unmodulated signal having the frequency f oscillated from the RF signal oscillator 16.
- the unmodulated signal of frequency f oscillated from the RF signal oscillator 17 is pulsed.
- the data transmitter 11, the RF signal oscillators 16 and 17, the switching switch 18 and the pulse modulator 13 constitute signal generating means.
- the RF signal oscillator 12 when the RF signal oscillator 12 receives data from the data transmitter 11, it is confirmed whether the data is standard data for power supply or transmission data such as a command. Oscillate an unmodulated signal of frequency f or an unmodulated signal of frequency f
- the force switch 18 shown in the figure confirms whether the data output from the data transmitter 11 is the standard data for power supply and whether it is the transmission data of commands, etc., and the RF signal oscillator 16 or RF It is also possible to output an unmodulated signal of frequency f or an unmodulated signal of frequency f oscillated from the signal oscillator 17 to the pulse modulator 13.
- FIG. 7 is a block diagram showing a data communication apparatus according to Embodiment 3 of the present invention.
- the switching switch 31 When the transmission data is output from the data transmitter 11, the switching switch 31 outputs the non-modulated signal of the frequency oscillated from the RF signal oscillator 12 to the pulse modulator 32, and instructs the data transmitter 11 to supply power.
- an unmodulated signal of frequency f oscillated from the RF signal oscillator 12 is output to the level adjuster 33.
- the pulse modulator 32 performs pulse modulation (for example, ASK modulation) on the non-modulated signal of the frequency f oscillated from the RF signal oscillator 12 according to the transmission data output from the data transmitter 11, and modulates the modulated signal.
- a transmission signal that is a signal is output.
- the level adjuster 33 is a pin for the unmodulated signal of frequency f oscillated from the RF signal oscillator 12.
- the peak power of the transmission signal is adjusted to be larger than the peak power of the transmission signal output from the pulse modulator 32.
- the switching switch 34 When the transmission data is output from the data transmitter 11, the switching switch 34 outputs the modulation signal output from the pulse modulator 32 to the amplifier 35, and the data transmitter 11 also instructs the supply of power. Is output, the unmodulated signal output from the level adjuster 33 is output to the amplifier 35.
- the amplifier 35 amplifies the modulated signal or the unmodulated signal output from the switching switch 34.
- the data transmitter 11, the RF signal oscillator 12, and the pulse modulator 32 constitute a signal generation unit.
- the switching means 31 and 34, the level adjuster 33 and the amplifier 35 constitute an amplifying means.
- FIG. 8 is a flowchart showing a data communication method according to the third embodiment of the present invention.
- the contactless IC card 2 is not equipped with a power source such as a battery, and cannot be activated unless it receives external power.
- the data transmitter 11 of the data communication apparatus 1 transmits data instructing the supply of power to the RF signal oscillator 12, the switching switches 31, 34 and 34 before outputting transmission data such as commands. And output to the pulse modulator 32 (step ST11).
- the data instructing the supply of power may be any data content as long as it can be clearly distinguished from the transmission data transmitted to the non-contact IC card 2.
- the RF signal oscillator 12 of the data communication apparatus 1 checks whether the data is transmission data such as a power command indicating the power supply. (Step ST12).
- the RF signal oscillator 12 When the RF signal oscillator 12 recognizes that the data output from the data transmitter 11 is data instructing power supply, the RF signal oscillator 12 oscillates an unmodulated signal having a frequency f (step ST13).
- the switching switch 31 of the data communication device 1 receives data from the data transmitter 11, the switching switch 31 determines whether the data is data for instructing the supply of power, or transmission data such as a command. Check.
- the switching switch 31 determines that the data output from the data transmitter 11 is data indicating power supply, the switching switch 31 generates a non-modulated signal of frequency f oscillated from the RF signal oscillator 12.
- the level adjuster 33 of the data communication device 1 receives the non-modulated signal having the frequency f oscillated from the RF signal oscillator 12, the level adjuster 33 adjusts the peak power of the non-modulated signal and
- the peak power of the signal is made larger than the peak power of the modulation signal output from the pulse modulator 32 (step ST14).
- the peak power of the unmodulated signal oscillated from the RF signal oscillator 12 is adjusted so that the peak power of the unmodulated signal for power supply is larger than the peak power of the modulated signal for data transmission.
- the switching switch 34 of the data communication device 1 receives data from the data transmitter 11, it determines whether the data is data for instructing the supply of power, or is transmission data such as a command. Check.
- the switching switch 34 When the switching switch 34 recognizes that the data output from the data transmitter 11 is data indicating the supply of power, the switching switch 34 outputs the non-modulated signal of the frequency f output from the level adjuster 33.
- the amplifier 35 of the data communication apparatus 1 receives an unmodulated signal having a frequency f from the switching switch 34.
- the unmodulated signal is amplified (step ST15).
- the antenna 15 of the data communication device 1 radiates the transmission signal into the air to transmit the transmission signal to the non-contact IC card 2 (step ST16).
- the antenna 21 of the contactless IC card 2 transmits the frequency f transmitted from the data communication device 1.
- the charging circuit 22 of the contactless IC card 2 is such that the antenna 21 receives a reception signal having a frequency f.
- the capacitor 23 is charged by the received signal.
- the RF signal oscillator 12 of the data communication device 1 confirms whether the data is transmission data such as a command that is data instructing power supply ( Step ST12).
- the RF signal oscillator 12 When the RF signal oscillator 12 recognizes that the data output from the data transmitter 11 is transmission data such as a command, the RF signal oscillator 12 oscillates an unmodulated signal having a frequency f (step ST17).
- the switch 31 of the data communication device 1 receives data from the data transmitter 11, it confirms that the data is transmission data such as a command that is data instructing the supply of power. To do.
- the switching switch 31 When the switching switch 31 recognizes that the data output from the data transmitter 11 is transmission data such as a command, the switching switch 31 generates an unmodulated signal of frequency f oscillated from the RF signal oscillator 12.
- the pulse modulator 32 of the data communication device 1 receives transmission data from the data transmitter 11 and receives an unmodulated signal of the frequency f oscillated from the RF signal oscillator 12, the pulse modulator 32 responds to the transmission data. Then, the unmodulated signal is subjected to pulse modulation (for example, ASK modulation), and the pulse modulated signal is output to the switch 34 (step ST18).
- pulse modulation for example, ASK modulation
- the switch 34 of the data communication device 1 When the switching switch 34 of the data communication device 1 receives data from the data transmitter 11, the switch 34 Confirm that the power of the data is the data that instructs the power supply.
- the switch 34 When the switch 34 recognizes that the data output from the data transmitter 11 is transmission data such as a command, the switch 34 outputs the modulation signal output from the pulse modulator 32 to the amplifier 35.
- the amplifier 35 of the data communication device 1 Upon receiving the modulation signal from the switch 34, the amplifier 35 of the data communication device 1 amplifies the modulation signal (step ST15).
- the antenna 15 of the data communication apparatus 1 When receiving the amplified transmission signal from the amplifier 17, the antenna 15 of the data communication apparatus 1 radiates the transmission signal into the air, thereby transmitting the transmission signal to the non-contact IC card 2 (step ST16).
- the antenna 21 of the non-contact IC card 2 receives the transmission signal of the frequency f transmitted from the data communication device 1 as a reception signal.
- the demodulation circuit 24 of the non-contact IC card 2 performs processing such as demodulating the received signal of the frequency f received by the antenna 21 by using the electric charge stored in the capacitor 23 of the charging circuit 22 as a power source. To do.
- the peak power of the non-modulated signal is Since it is amplified to be larger than the peak power of the modulation signal, a frequency f different from the frequency f of the modulation signal for data transmission is assigned to the unmodulated signal for power supply.
- the peak power of the unmodulated signal at the time of power supply is constant.
- the peak power of the unmodulated signal need not be constant.
- the power level at the rise and fall of the RF signal may have a slope.
- Embodiment 4 when the RF signal oscillator 12 receives data from the data transmitter 11, it is confirmed whether the data is transmission data such as a command or a command indicating the power supply. Oscillates unmodulated signal of frequency f or unmodulated signal of frequency f
- R which oscillates an unmodulated signal of frequency f
- An F signal oscillator 16 and an RF signal oscillator 17 that oscillates an unmodulated signal having a frequency f are provided.
- the switching switch 34 According to the data output from the data transmitter 11 by the switching switch 34, either the modulated signal output from the pulse modulator 32 or the unmodulated signal output from the level adjuster 33 is supplied to the amplifier 35.
- the output S can be achieved with the same effect as in the third embodiment.
- the modulated signal for data transmission is amplified and transmitted at the first amplification factor
- the unmodulated signal for power supply is amplified by the second amplification larger than the first amplification factor. It is explained that it is amplified at a rate and transmitted.
- the peak power of the unmodulated signal at the time of power supply is kept high, and transmission is turned ON / OFF to It can be operated so that the average power during supply and data transmission is constant.
- the peak power of the non-modulated signal at the time of power supply is kept large, and the power value at the time of power supply is changed so that the average power at the time of power supply and data transmission is constant. Just do it.
- the data communication device and the data communication method according to the present invention are not equipped with a power source such as a battery, and cannot be activated unless power is supplied from the outside. Suitable for use in non-contact wireless communication devices.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010033107A1 (de) | 2010-08-02 | 2012-02-02 | Aj Innuscreen Gmbh | Nachweis spezifischer Nukleinsäuresequenzen mittels Fluoreszenzlöschung |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH09148971A (ja) * | 1995-11-27 | 1997-06-06 | Matsushita Electric Works Ltd | 移動体識別装置 |
JP2001067449A (ja) * | 1985-06-03 | 2001-03-16 | Nippon System Kenkyusho:Kk | 非接触伝送装置 |
-
2004
- 2004-07-30 WO PCT/JP2004/010960 patent/WO2006011233A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001067449A (ja) * | 1985-06-03 | 2001-03-16 | Nippon System Kenkyusho:Kk | 非接触伝送装置 |
JPH09148971A (ja) * | 1995-11-27 | 1997-06-06 | Matsushita Electric Works Ltd | 移動体識別装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010033107A1 (de) | 2010-08-02 | 2012-02-02 | Aj Innuscreen Gmbh | Nachweis spezifischer Nukleinsäuresequenzen mittels Fluoreszenzlöschung |
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