WO2006030497A1 - 無線通信システム及び電力生成装置及び通信装置及び電力生成方法 - Google Patents
無線通信システム及び電力生成装置及び通信装置及び電力生成方法 Download PDFInfo
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- WO2006030497A1 WO2006030497A1 PCT/JP2004/013412 JP2004013412W WO2006030497A1 WO 2006030497 A1 WO2006030497 A1 WO 2006030497A1 JP 2004013412 W JP2004013412 W JP 2004013412W WO 2006030497 A1 WO2006030497 A1 WO 2006030497A1
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- Prior art keywords
- wave
- power generation
- transmitted
- power
- radio
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- Legal status (The legal status 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 status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/59—Responders; Transponders
-
- 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
- G06K19/0723—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 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
- G06K19/0724—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 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs the arrangement being a circuit for communicating at a plurality of frequencies, e.g. for managing time multiplexed communication over at least two antennas of different types
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
- H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
Definitions
- the present invention relates to a wireless communication system, a power generation device, a communication device, and a power generation method.
- the present invention relates to a wireless communication system including an interrogator that transmits radio waves and a responder that receives radio waves transmitted by the interrogator and generates operating power based on the received radio waves.
- a single interrogator also transmits a single carrier wave and supplies power to a responder (for example, Japanese Patent Laid-Open No. 4-147082: page 3-4) Page, Fig. 1).
- the transponder rectified a single carrier wave from the interrogator received by the antenna to obtain direct current power necessary for internal circuit operation.
- the transponder controls the antenna impedance based on the data to be transmitted, modulates by reflection, and transmits the data.
- the carrier wave modulated by the transponder is received and demodulated by the interrogator.
- the interrogator extracts the data transmitted by the responder.
- a wireless ID system can be constructed by transmitting a response identifier (ID: IDentification) as data from the response.
- ID response identifier
- Patent Document 1 Japanese Patent Laid-Open No. 4-147082
- An object of the present invention is to realize a wireless data communication system capable of long-distance communication between an interrogator and a responder.
- the wireless communication system of the present invention comprises:
- a plurality of communication devices each transmitting radio waves of at least one type of frequency, and a combined wave obtained by combining the radio waves transmitted by the plurality of communication devices are received, and electric power is generated based on the received combined waves Power generator and
- a radio wave having a frequency different from that of another communication device is transmitted.
- the plurality of communication devices include:
- a first communication device that transmits a first radio wave having a predetermined frequency
- a second communication device that transmits a second radio wave having a frequency different from that of the first radio wave
- a communication device that transmits multiple radio waves
- a power generation device that receives a combined wave in which a plurality of radio waves transmitted by the communication device are combined, and generates power based on the received combined wave;
- the communication device comprises:
- a plurality of radio waves having different frequencies are transmitted.
- the communication device comprises:
- a first radio wave having a predetermined frequency and a second radio wave having a frequency different from the first radio wave are transmitted.
- the power generation device of the present invention includes:
- It is characterized in that it receives a synthesized wave composed of a plurality of radio waves and generates electric power based on the received synthesized wave.
- the power generation device comprises:
- It is characterized by receiving a synthesized wave in which a plurality of radio waves having different frequencies are synthesized.
- the power generation device comprises: A radio wave is transmitted from each of a plurality of communication devices each transmitting a radio wave having a different frequency, and a combined wave obtained by combining the radio waves transmitted from each of the plurality of communication devices is received.
- the power generation device comprises:
- the first radio wave and the second radio wave are transmitted from the first communication device that transmits the first radio wave of the specified frequency and the second communication device that transmits the second radio wave having a frequency different from the first radio wave. It is characterized by receiving a synthesized wave in which the first radio wave and the second radio wave are synthesized.
- the power generation device includes:
- a communication device that transmits multiple radio waves with different frequencies. Transmitted with multiple radio waves with different frequencies, and receives a composite wave composed of multiple transmitted radio waves.
- the power generation device comprises:
- the first radio wave and the second radio wave are transmitted from the communication device that transmits the first radio wave with a predetermined frequency and the second radio wave with a frequency different from the first radio wave, and the transmitted first radio wave and second radio wave are It is characterized by receiving the synthesized wave.
- the power generation device comprises:
- a modulation unit that modulates and transmits a received synthesized wave with a modulation wavelength corresponding to predetermined data based on the generated power.
- the power generation device further includes:
- a data storage unit for storing predetermined data
- the modulator is a modulator
- the received composite wave is modulated and transmitted by a modulation wavelength corresponding to predetermined data stored in the data storage unit.
- a communication device that transmits radio waves to a power generation device that generates power using the received radio waves.
- the power generation device By transmitting a plurality of radio waves to the power generation device, the power generation device receives a synthesized wave in which the transmitted plurality of radio waves are synthesized, and based on the received synthesized wave, The power generation device generates power.
- the communication device comprises:
- Radio waves having different frequencies are transmitted as a plurality of radio waves to be transmitted to the power generation device.
- the communication device comprises:
- a first radio wave having a predetermined frequency and a second radio wave having a frequency different from the first radio wave are transmitted.
- the plurality of communication devices include:
- a communication device other than the predetermined communication device stops the transmission of the radio wave, and the predetermined communication device modulates the radio wave transmitted by the modulation device corresponding to the predetermined data to generate the power.
- the predetermined communication device modulates the radio wave transmitted by the modulation device corresponding to the predetermined data to generate the power.
- the power generation device includes:
- the modulated radio wave transmitted from the predetermined communication device is received and demodulated.
- Each of the plurality of communication devices includes:
- the power generation device includes:
- the power generation device includes:
- the received synthesized wave is demodulated based on the generated power.
- the communication device comprises:
- a plurality of radio waves transmitted by itself are synchronously modulated by the same modulation waveform, and the radio waves modulated in synchronization are transmitted to the power generation device,
- the power generation device includes:
- the power generation device comprises:
- the received synthesized wave is demodulated based on the generated power.
- the power generation method of the present invention includes:
- It is characterized in that it receives a synthesized wave composed of a plurality of radio waves and generates electric power based on the received synthesized wave.
- the responder since the responder receives the composite wave with the maximum amplitude increased, the DC power obtained by rectifying the received composite wave can be increased. Therefore, the communication distance between the responder and the interrogator can be increased.
- Embodiment 1 will be described with reference to FIG. 1 and FIG.
- the interrogator reader device 110 transmits carrier waves 130 and 131 having different frequencies, and the responder tag 120 receives the combined wave of the carrier waves 130 and 131 to generate operating power. It is an embodiment.
- the same reference numerals are assigned to components having similar functions, and description thereof may be omitted.
- FIG. 1 shows a configuration diagram of a wireless communication system 1000 according to the first embodiment.
- the wireless communication system 1000 includes a host computer 100 (hereinafter referred to as a host), a reader device 110 (an example of a communication device) as an interrogator, and a tag 120 (an example of a power generation device) as a responder. Composed.
- a host hereinafter referred to as a host
- reader device 110 an example of a communication device
- tag 120 an example of a power generation device
- the host 100 controls the reader device 110.
- the reader device 110 transmits two types of carrier waves 130 (an example of a first radio wave) and carrier waves 131 (an example of a second radio wave) having different frequencies.
- the frequency of the carrier wave 130 is f0
- the frequency of the carrier 131 is fl (fO ⁇ fl).
- the tag 120 receives the combined wave of the carrier waves 130 and 131 transmitted from the reader device 110 and generates operating power.
- the tag 120 transmits a response 140 to the reader device 110.
- FIG. Figure 2 shows the sequence of operations for collecting the identifiers of tags.
- the host 100 requests the reader device 110 to search for the tag 120 existing around the reader device 110 and collect the identifiers (S101).
- the reader device 110 Upon receiving the request, the reader device 110 issues an inquiry to search for the tag 120 (S105). However, prior to this issuance, the tag 120 is charged (period during which charge is stored: S102 to S104). Therefore, the reader device 110 outputs a plurality of carrier waves 130 and 131 having different frequencies at the same time to supply power to the tag 120 (S102, S103).
- the tag 120 receives the combined radio wave (combined wave) of the carrier waves 130 and 131 and rectifies the received combined wave. As a result, the tag 120 obtains electric power necessary for the operation of the internal circuit (S104).
- the reader device 110 After the power storage period (S102-S104), the reader device 110 transmits inquiry request data (S105).
- the tag 120 receives the inquiry data request, interprets the inquiry data, and determines that the request is an identifier (S106).
- the reader device 110 transmits carrier waves 130 and 131 (S107).
- the tag 120 controls the antenna impedance based on the data to be transmitted and modulates the reflection based on the data to be transmitted, and transmits the tag 120 identifier as data (response). Equivalent to 140) (S108, S109).
- the reader device 110 Upon receiving the response 140 transmitted by the tag 120, the reader device 110 demodulates it and extracts the data transmitted by the tag 120 (S110).
- FIG. 3 is a diagram showing a waveform 200 of the carrier wave 130.
- FIG. 4 is a diagram showing a waveform 201 of the carrier wave 131.
- FIG. 5 is a diagram showing a combined waveform of the waveform 200 and the waveform 201.
- the amplitude of the carrier wave 130 having the frequency fO is 1.
- the waveform of carrier 130 is shown as waveform 200 in FIG.
- the waveform of the carrier 131 is shown as a waveform 201 in FIG.
- a waveform obtained by synthesizing the carriers 130 and 131 at the above point is shown as a synthesized waveform 210.
- the synthesized composite waveform 210 repeats amplitudes with period T. It can be seen that the maximum amplitude is the sum of the amplitudes of the original carrier waveforms 200 and 201.
- the sum of the amplitudes is “2”. This is true for any point around the reader device 110. This means that there is no point dependence when combining carriers of the same frequency compared to the point where the maximum amplitude is always the sum of the carriers and the point where the maximum amplitude is always zero (interference fringes are generated). , And is advantageous in terms of
- FIG. 6 is a diagram for explaining the output power of each of the carriers 130 and 131.
- a carrier wave 130 shows a frequency spectrum 220 (when not modulated).
- a carrier 131 indicates a frequency spectrum 221 (when not modulated).
- the figure shows the output power upper limit 230 (value P) defined by laws and regulations, for example.
- power required for the operation of the tag 120 is supplied by transmitting a single carrier wave (for example, only the carrier wave 130) from the reader device 110. When only the carrier wave 130 is transmitted, only the frequency spectrum 220 is obtained.
- the reader device 110 supplies a plurality of carriers 130 and 131 having different frequencies to supply power necessary for the operation of the tag 120.
- the frequency spectrum is a frequency spectrum 220 and a frequency spectrum 221.
- the output power of each carrier wave must be smaller than the value P of the output power upper limit 230 defined by law or the like.
- the output power of each of the carrier waves 130 and 131 is maintained to be equal to the carrier wave 130 in the conventional wireless data communication system while combining them to obtain a combined waveform 210 shown in FIG.
- the amplitude can be increased.
- the output power of each carrier wave from the reader device 110 is kept below a certain level.
- the maximum amplitude of the radio wave at any point around the reader device 110 can be increased while keeping it.
- the tag 120 can increase the DC power obtained by rectification by receiving the combined wave with the maximum amplitude increased. Therefore, the communication distance between the reader device 110 and the tag 120 can be increased.
- carrier waves 130 and 131 having different frequencies are transmitted from one reader device 110, and a combined wave of the carrier waves 130 and 131 is received by the tag 120 to generate power.
- the number of radio waves transmitted by the reader device and the frequency of radio waves can be freely selected.
- the reader device 110 may transmit a carrier wave having the same frequency.
- the reader apparatus 110 may be a system that transmits two carriers of frequency fO and two carriers of frequency fl.
- the tag 120 may be a system that receives a composite wave of a plurality of carrier waves transmitted from the reader device 110 and generates electric power from the received composite wave.
- the number and frequency of radio waves transmitted by the reader device can be freely selected.
- the reader device transmits a plurality of carrier waves.
- the tag receives a composite wave of a plurality of carriers, and generates power based on the received composite wave.
- the maximum amplitude of the combined wave becomes larger than the maximum amplitude of the carrier alone, so that the tag can obtain larger power than when the power is generated by the carrier alone.
- the reader device transmits a plurality of carrier waves having different frequencies.
- the tag receives a composite wave of a plurality of carrier waves having different frequencies, and generates power based on the received composite wave.
- the maximum amplitude of the combined wave is larger than the maximum amplitude of the carrier alone, so that the tag can obtain a larger amount of power than when the power is generated by the carrier alone.
- the reader device transmits two radio waves having different frequencies. Therefore, with a simple configuration, the power generated by the tag is increased and communication between the reader device and the tag is performed. The distance can be increased.
- the reader device according to Embodiment 1 transmits a plurality of carrier waves to the tag, thereby causing the tag to receive a combined wave in which the plurality of transmitted carrier waves are combined. Based on the received combined wave, the tag To generate power. In this case, since the maximum amplitude of the combined wave is larger than the maximum amplitude of a single carrier wave, the tag can acquire a larger power than when receiving a single carrier wave.
- the reader device of the first embodiment transmits carrier waves having different frequencies as a plurality of radio waves to be transmitted to the tag. Then, the combined wave of the carrier waves having different frequencies is received by the tag, and electric power is generated by the combined wave. In this case, since the maximum amplitude of the combined wave is larger than the maximum amplitude of a single carrier wave, the tag can acquire a larger power than when receiving a single carrier wave.
- the reader device of the first embodiment transmits a carrier wave 130 having a frequency fO and a carrier wave 131 having a frequency fl as a plurality of radio waves to be transmitted to the tag. For this reason, the tag receives the combined wave of the carrier wave 130 and the carrier wave 131 and generates power based on the received combined wave. Therefore, it is possible to acquire larger power than when receiving the carrier wave alone and generating power.
- Embodiment 2 will be described with reference to FIGS.
- a specific configuration of the above-described reader device 110 will be described.
- the reader device 110 transmits the carrier waves 130 and 131 using a single amplifier circuit 320 and a single antenna 330 will be described.
- the third embodiment to be described later a configuration in which carrier waves 130 and 131 are transmitted using a plurality of amplifier circuits 321 and 322 and a plurality of antennas 331 and 332 will be described.
- FIG. 7 is a configuration diagram of the reader device 110.
- the configuration of the reader device 110 will be described with reference to FIG.
- the reader device 110 includes a control circuit 300, oscillation Z modulation circuits 310 and 311, an amplification circuit 320, an antenna 330, a demodulation circuit 340, and a circulator 350.
- the control circuit 300 controls data transmission / reception and data transfer with the host 100.
- Oscillation Z modulation circuits 310 and 311 oscillate and modulate the carrier wave 130 and the carrier wave 131.
- the amplifier circuit 320 amplifies the outputs of the oscillation Z modulation circuits 310 and 311.
- the antenna 330 transmits and receives radio waves.
- Demodulator circuit 340 extracts data from response 140 received by antenna 330.
- Circulator 350 provides the output of amplifier circuit 320 to antenna 330, while antenna 350 The received signal from 330 is applied to the demodulation circuit 340.
- FIG. 8 is a flowchart showing an inquiry operation for searching for the tag 120 by the reader device 110. With reference to FIG. 8, this operation will be described.
- control circuit 300 Upon receiving a request from the host 100, the control circuit 300 starts controlling the oscillation Z modulation circuits 310 and 311 (S201).
- control circuit 300 instructs the oscillation Z modulation circuits 310 and 311 to generate signals that are the basis of the carrier waves 130 and 131 (S202).
- the oscillation Z modulation circuit 310 oscillates a signal of frequency fO, and at the same time, the oscillation Z modulation circuit 311 oscillates a signal of frequency fl (S203), and the amplification circuit 320 amplifies these signals (S204 ), Is applied to the circulator 350 force S antenna 330 (S205) and transmitted as antenna 330 force S carrier waves 130 and 131 (S206).
- FIG. 9 is a flowchart showing an operation when the reader device 110 receives the response 140 from the tag 120. This operation will be described with reference to FIG.
- the radio wave of response 140 is received by the antenna 330 (S301, S302), the circulator 350 gives the signal to the demodulation circuit 340 (S303), and the demodulation circuit 340 extracts the data (S304).
- the control circuit 300 generates the identifier of the tag 120 requested by the host 100 based on the data and transfers it to the host 100. (S305)
- a plurality of carrier waves 130 and 131 having different frequencies are simultaneously transmitted using a single amplifier circuit 320 and a single antenna 330, whereby each carrier wave output from the reader device 110 is output. While the power is kept below a certain level, the maximum amplitude of the radio wave at any point around the reader device 110 can be increased, and the DC power obtained by rectifying it with the tag 120 can be increased. Therefore, the communication distance between the reader device 110 and the tag 120 can be increased.
- FIG. 1 is a configuration diagram of a line communication system 2000.
- FIG. FIG. 11 is a configuration diagram of the reader device 111 according to the third embodiment.
- the configuration of the reader device 111 is different from the reader device 110 of the first embodiment. That is, the reader apparatus 110 of the first embodiment transmits the carrier waves 130 and 131 using the single amplifier circuit 320 and the single antenna 330.
- the reader device 111 of the third embodiment transmits the carrier waves 130 and 131 by the two amplifier circuits 321 and 322 and the two antennas 331 and 332.
- control circuit 300 As shown in FIG. 11, the control circuit 300, the oscillation Z modulation circuit 310, the oscillation Z modulation circuit 311, the demodulation circuit 340, and the circulator 350 are the same as those in FIG.
- the amplifier circuit 321 amplifies the output of the oscillation Z modulation circuit 310.
- the amplifier circuit 322 amplifies the output of the oscillation Z modulation circuit 311.
- the antenna 331 transmits the output of the amplifier circuit 321.
- the antenna 332 transmits the output of the amplifier circuit 322.
- the oscillation Z modulation circuit 310 oscillates the signal of the frequency fO, and at the same time, the oscillation Z modulation circuit 311 oscillates the signal of the frequency fl. This is the same as the device 110.
- Amplifier circuits 321 and 322 amplify each signal.
- the output of the amplifier circuit 321 is given to the antenna 331 via the circulator 350.
- the output of the amplifier circuit 322 is directly given to the antenna 332. Then, the antenna 331 transmits the carrier wave 130, and the antenna 3 32 transmits the carrier wave 131.
- the manner in which the tag 120 receives and operates the combined wave in which the carrier waves 130 and 131 are combined is the same as that of the first embodiment, and thus the description thereof is omitted.
- the operation of the reader device 111 when the antenna 140 receives the response 140 from the tag 120 and the demodulation circuit 340 demodulates it via the circulator 350 is the same as that in the second embodiment (FIG. 9). Is omitted.
- each carrier output power from the reader device is unified.
- the maximum amplitude of radio waves at any point around the reader device can be increased while keeping it below a certain level.
- the tag can increase DC power by rectifying radio waves having an increased maximum amplitude. Therefore, the communication distance between the reader device and the tag can be increased.
- the maximum amplitude of radio waves can be increased without increasing the output per amplifier circuit, thereby reducing the price of the reader device.
- Embodiment 4 is a wireless communication system that transmits a plurality of carrier waves 130 and 131 using a plurality of reader apparatuses.
- FIG. 12 is a configuration diagram of the wireless communication system 3000 according to the fourth embodiment.
- the wireless communication system 3000 includes a host 100, a reader device 401a (an example of a first communication device), a reader device 401b (an example of a second communication device), and a tag 120 (an example of a power generation device).
- the reader device 4 Ola transmits a carrier wave 130 (an example of a first radio wave).
- the reader device 401b transmits a carrier wave 131 (an example of a second radio wave).
- FIG. 13 is a configuration diagram of the reader device 401a.
- the reader device 401b is not shown because it has the same configuration as the reader device 401a.
- the reader device 401b includes a control circuit 300a, an oscillation Z modulation circuit 310a, an amplification circuit 320a, an antenna 330a, a demodulation circuit 340a, and a circulator 350a.
- the reader device 401b includes a control circuit 300b, an oscillation Z modulation circuit 310b, an amplification circuit 320b, an antenna 330b, a demodulation circuit 340b, and a circulator 350.
- the host device 100a, the reader devices 401a, 401b, and the reader devices 401a, 401b and the vicinity of the reader devices 401a, 401b are searched for, and a request is made to collect their identifiers.
- the reader devices 401a and 401b Upon receiving the request, the reader devices 401a and 401b issue an inquiry to search for the tag 120, and at that time, simultaneously output a plurality of carriers 130 and 131 having different frequencies.
- the reader device 401a Upon receiving a request from the host 100, the reader device 401a causes the control circuit 300a to oscillate. Control of the modulation circuit 310a is started.
- control circuit 300a instructs the oscillation Z modulation circuit 310a to generate a signal that is the source of the carrier wave 130 (or 131), and the control circuit 300b transmits the signal to the oscillation Z modulation circuit 310b.
- the generation of a signal that is the basis of the carrier 131 is instructed.
- the oscillation Z modulation circuit 310a of the reader device 401a oscillates a signal of frequency fO
- the amplification circuit 320a amplifies this signal
- the circulator 350a gives the antenna 330a
- the antenna 330a transmits it as the carrier wave 130.
- the oscillation Z modulation circuit 310b of the reader device 401b oscillates a signal of frequency fl
- the amplification circuit 320b amplifies this signal
- the circulator 350b provides the antenna 330b
- the antenna 330b transmits as the carrier wave 131.
- the tag 120 receives the combined wave in which the carrier waves 130 and 131 transmitted from the reader devices 401a and 401b are combined.
- the subsequent operation that is, the operation in which the tag 120 receives the composite wave and the reader device 401a and 401b receives the response 140 from the tag 120 is the same as in the first and second embodiments, and thus the description thereof is omitted. .
- the carrier waves 130 and 131 having different frequencies are transmitted from the two reader devices 401a and 401b, and the combined wave is received by the tag 120 to generate power.
- the number of reader devices is not limited to two.
- the frequency of the radio wave transmitted by the reader device may be freely determined.
- Each of the plurality of reader devices may transmit radio waves having at least one type of frequency.
- the tag 120 may be a system that receives a combined wave in which radio waves transmitted from a plurality of reader devices are combined and generates electric power based on the received combined wave.
- the frequency transmitted by the plurality of reader devices is not limited. For example, two The reader device may transmit a carrier wave having the same frequency.
- the sum of the carrier waves is always zero.
- a system in which two of the four reader devices transmit a carrier wave having a frequency fO and the remaining two devices transmit a carrier wave having a frequency fl may be used.
- a system in which three reader devices transmit a carrier wave having a frequency fO and the other one transmits a carrier wave having a frequency fl may be used.
- the tag 120 may receive a composite wave, and the received composite wave power may be a system that generates electric power. In this way, the number of reader devices and the frequency of radio waves transmitted by the reader device can be freely selected.
- each of the plurality of reader devices that transmits radio waves of at least one type of frequency, and the combined wave obtained by combining the radio waves transmitted by the plurality of reader devices Since the power generation device that generates power based on the received composite wave is provided, the maximum amplitude of the composite wave becomes larger than the maximum amplitude of the single radio wave, so that the tag generates power with the single radio wave. Larger power can be obtained than when it is generated.
- each of the plurality of reader devices may transmit radio waves having a frequency different from that of radio waves transmitted by other reader devices.
- the tag receives a composite wave of a plurality of radio waves having different frequencies, and generates power based on the received composite wave.
- the maximum amplitude of the combined wave becomes larger than the maximum amplitude of the single radio wave, and the tag can obtain a large amount of power compared to the case where the power is generated by the single radio wave.
- the plurality of reader devices are configured by a reader device that transmits carrier wave 130 and a reader device that transmits carrier wave 131.
- the tag receives a combined wave of the carrier wave 130 and the carrier wave 131 having different frequencies, and generates electric power based on the received combined wave.
- the maximum amplitude of the combined wave is larger than the maximum amplitude of a single carrier wave, and thus the tag can obtain a larger amount of power than when generating power with a single carrier wave.
- Embodiment 5 will be described with reference to FIGS.
- the tag The generation of power by 120 will be described. That is, an operation of receiving a combined wave of a plurality of carrier waves with different tags 120 and obtaining operating power of the circuit from the received combined wave cover will be described.
- FIG. 14 is a configuration diagram of the tag 120.
- the tag 120 includes a power circuit 410 that supplies power to each circuit, a demodulator circuit 420 that extracts data from the received radio wave power, a modulation circuit 430 that puts data in the response 140 (an example of a modulation unit), and an identifier ( Memory 440 (an example of a data storage unit) that stores (predetermined data), a control circuit 450 that controls each circuit, and an antenna 490 that transmits and receives radio waves.
- FIG. 15 shows a configuration example of the power supply circuit 410.
- the power supply circuit 410 includes a signal input 455 for inputting a reception signal from the antenna 490, diodes 460 and 461, capacitors 470 and 471, and power outputs 480 (positive electrode) and 481 (negative electrode).
- FIG. 16 is a flowchart of the operation in which the tag 120 generates power.
- the operation in which the power supply circuit 410 generates power will be described with reference to FIG.
- the case of the wireless communication system 1 000 according to the first embodiment is assumed.
- the reader device 110 When issuing an inquiry to the tag 120, the reader device 110 simultaneously transmits a plurality of carriers 130 and 131 having different frequencies in order to supply power to the tag 120 during the period of power storage. Output (S401). At this time, for example, if the received waveform components of the carrier waves 130 and 131 in the tag 120 are the waveform 200 in FIG. 3 and the waveform 201 in FIG. 4, respectively, the combined waveform becomes the combined waveform 210 in FIG.
- the tag 120 receives the combined wave of the carrier waves 130 and 131 with the antenna 490 (S402).
- DC power is generated and stored by rectification in the power supply circuit 410 and used as an operating power supply for each circuit of the tag 120 (S403). At this time, if the operating power supply voltage output from the power supply circuit 410 does not exceed a certain level (for example, 1 volt), each internal circuit of the tag 120 cannot operate.
- a certain level for example, 1 volt
- the operation of the power supply circuit 410 will be described.
- the received signal (combined wave) received by the antenna 490 is given to the signal input 455. Then, it is rectified from the diodes 460 and 461 and stored in the capacitors 470 and 471. As a result, power for operation of the internal circuit of the tag 120 is supplied from the power output 480, 481.
- the tag 120 receives the combined wave and generates electric power based on the received combined wave.
- the operation of the tag 120 can also be implemented as a form of power generation method. In other words, in a power generation method that generates power using received radio waves, a power generation method that receives a composite wave that is a combination of multiple radio waves and generates power based on the received composite wave. Can be implemented.
- the operation of the tag 120 is as described above.
- a power source necessary for the operation of each circuit is obtained from a combined waveform 210 obtained by combining the waveforms 200 and 201 of the carrier waves 130 and 131 during the period of storage. Therefore, by synthesizing a plurality of carrier waves having different frequencies, the amplitude of the combined wave increases as compared with the amplitude of the carrier wave.
- the tag can increase the DC power obtained by rectifying the synthesized wave. Therefore, the communication distance between the reader device and the tag can be increased.
- the operation of the diode in the power supply circuit is generally more efficient as the amplitude of the input signal is larger.
- the combined wave which is composed of multiple carriers with different frequencies, has an increased amplitude compared to the carrier wave. For this reason, the tag can improve the conversion efficiency to DC power by receiving the synthesized wave. Therefore, the communication distance between the reader device and the tag can be increased so much.
- the tag of the fifth embodiment receives a combined wave in which a plurality of radio waves are combined, and generates electric power based on the received combined wave. For this reason, since the maximum amplitude of the combined wave is larger than the maximum amplitude of a single radio wave, the tag can obtain more power than when receiving a single radio wave.
- the tag according to the fifth embodiment receives a combined wave in which a plurality of radio waves having different frequencies are combined, and generates electric power based on the received combined wave having a different frequency. For this reason, since the maximum amplitude of the combined wave is larger than the maximum amplitude of a single radio wave, the tag can acquire a larger power than when receiving a single radio wave.
- the tag according to the fifth embodiment transmits a combined wave, in which radio waves are transmitted from each of a plurality of reader devices that transmit radio waves having different frequencies, and the radio waves transmitted from each of the plurality of reader devices are combined. Receive. Then, the tag generates power based on the received composite wave. For this reason, the maximum amplitude of the combined wave is larger than the maximum amplitude of a single radio wave. Therefore, the tag can acquire larger power than when receiving a single radio wave.
- the tag of the fifth embodiment is transmitted by transmitting the carrier 130 and the carrier 131 from the reader device that transmits the carrier wave 130 of the frequency fO and the reader device that transmits the carrier wave 131 of the frequency fl.
- a combined wave in which 130 and the carrier 131 are combined is received.
- a tag produces
- the tag of Embodiment 5 is a reader device that transmits a plurality of radio waves having different frequencies.
- the tag receives a plurality of radio waves having different frequencies and receives a synthesized wave obtained by synthesizing the plurality of transmitted radio waves. .
- a tag produces
- the tag of Embodiment 5 is transmitted from carrier device 130 and carrier 131 transmitted from a reader device that transmits carrier 130 of frequency fO and carrier 131 of frequency fl. And a synthesized wave synthesized.
- the tag generates power based on the received composite wave. For this reason, since the maximum amplitude of the combined wave is larger than the maximum amplitude of a single radio wave, the tag can acquire larger power than when receiving a single radio wave.
- the tag 120 receives the combined wave of the carrier waves 130 and 131, modulates the received combined wave with the modulation waveform corresponding to the identifier held by the tag 120, and transmits it to the reader device 110. It is a form.
- the wireless communication system 1000 of Embodiment 1 is assumed. The same applies to the radio communication system 2000 according to the third embodiment and the radio communication system 3000 according to the fourth embodiment.
- the tag 120 has the configuration shown in FIGS. An outline of modulation by the tag 120 will be described with reference to FIG.
- the reader device 110 modulates the carrier wave by the oscillation Z modulation circuit 310 under the control of the control circuit 300 after the period during which the tag 120 is charged, and the data (command) indicating the inquiry request is generated.
- Send Figure 2: S105.
- the tag 120 receives this by the antenna 490, extracts the data by the demodulation circuit 420, and interprets the data by the control circuit 450.
- the request is an identifier inquiry request (S106).
- the reader device 110 transmits the carrier waves 130 and 131 through the oscillation Z modulation circuit 310, the amplification circuit 320, the antenna 330, and the circulator 350 under the control of the control circuit 300.
- the tag 120 the combined wave of the carrier waves 130 and 131 is received by the antenna 490 (S107).
- the control circuit 450 gives the identifier stored in the memory 440 to the modulation circuit 430.
- the modulation circuit 430 modulates and transmits the carrier wave (synthetic wave) received by the antenna 490 by controlling the impedance of the antenna 490 (S108). As a result, a response 140 is transmitted from the antenna 490 and reaches the reader device 110.
- FIG. 17 is a diagram showing a composite waveform 500 of the composite wave (the composite wave of the carrier waves 130 and 131) received by the tag 120.
- FIG. This synthesized waveform 500 corresponds to a long time of the synthesized waveform 210 shown in FIG. 5, and corresponds to the cycle T force of the magnitude of the synthesized waveform amplitude in FIG.
- FIG. 18 is a diagram showing a modulation waveform 510 applied to the composite waveform 500 of the composite wave.
- FIG. 19 shows a response waveform 511 obtained by modulating the composite waveform 500 with the modulation waveform 510. This response waveform 511 is transmitted from the tag 120.
- the modulation circuit 430 of the tag 120 shown in FIG. 14 controls the impedance of the antenna 490 by the modulation waveform 510 corresponding to the data (identifier) to be transmitted.
- the modulation of the composite waveform 500 received by the antenna 490 results in the response waveform 511 being transmitted from the antenna 490 (the amplitude of the response waveform 511 is (Depends on gain of antenna 490).
- the response waveform 511 corresponds to the response 140 of the tag 120.
- the response 140 is received by the antenna 330, and the circulator 350 provides the demodulation circuit 340 with the demodulation circuit 340.
- Path 340 demodulates the data and control circuit 300 obtains the tag 120 identifier.
- the demodulation circuit 340 may extract only frequency components near the frequency fO of the carrier wave 130 from the response waveform 511, and perform normal demodulation based on the result.
- the present invention is not limited to this method, and other demodulation methods may be used.
- the synthesized wave is modulated using the modulation wavelength 510 corresponding to the identifier (an example of the predetermined data) stored in the memory 440 (data storage unit).
- the data (predetermined data) modulated by the modulation circuit 430 is not limited to the data stored in the memory 440.
- the modulation circuit 430 may modulate and transmit the synthesized wave using the modulation wavelength corresponding to the received sensor value (an example of predetermined data).
- the tag of the sixth embodiment modulates and transmits a combined wave of a plurality of carrier waves transmitted by the reader device.
- the reader device receives and demodulates the modulated composite wave transmitted by the tag. Thereby, data transfer can be performed.
- the tag since the tag modulates the received composite wave, the amplitude of the radio wave used for data transfer can be increased. Therefore, the communication distance between the reader device and the tag can be increased.
- Embodiment 7 relates to a system in which a plurality of reader devices transmit a plurality of carrier waves, and each reader device synchronizes to transmit predetermined data to a tag 120.
- FIG. 20 is a configuration diagram of the wireless communication system 4000 according to the seventh embodiment.
- the wireless communication system 4000 is characterized in that the reader device 600a and the reader device 600b are synchronized with the wireless communication system 3000 of the fourth embodiment.
- the wireless communication system 4000 includes a host 100, reader devices 600a and 600b, and a tag 120.
- the reader devices 600a and 600b have a synchronization function.
- a synchronization signal 610 for synchronizing the reader devices 600a and 600b is transmitted from the reader device 600a to the reader device 600b. Details of the synchronization will be described later.
- FIG. 21 is a diagram illustrating a configuration example of the reader device 600a and the reader device 600b.
- the oscillation Z modulation circuit 310a, the amplification circuit 320a, the antenna 330a, the demodulation circuit 340a, and the circulator 350a are the same as those in FIG. Also, oscillation Z modulation circuit 310b
- the circulator 350b has the same function as the oscillation Z modulation circuit 310a-circulator 350a.
- the control circuit 620a and the control circuit 620b have a synchronization function.
- FIG. 22 is a sequence showing an inquiry operation for searching for the tag 120 from the reader devices 600a and 600b. This operation will be described with reference to FIG.
- the control circuit 6 20a of the reader device 600a Upon receiving a request from the host 100 (S501, S502), the control circuit 6 20a of the reader device 600a starts controlling the oscillation Z modulation circuit 310a (S503), and similarly, the control circuit 620b of the reader device 600b. Starts control of the oscillation Z modulation circuit 310b (S504).
- control circuit 620a of the reader device 600a outputs the operation timing of the oscillation Z modulation circuit 310a as the “synchronization signal 610” and controls the timing of the oscillation Z control circuit 310a (S505, S506).
- the control circuit 620b of the reader device 600b inputs the “synchronization signal 610” and controls the operation timing of the oscillation Z modulation circuit 310b based on the input “synchronization signal 610” (S5 07).
- the oscillation Z modulation circuit 310a of the reader device 600a and the oscillation Z modulation circuit 310b of the reader device 600b operate in synchronization.
- the reader devices 600a and 600b output the carrier waves 130 and 131 in synchronization.
- this synchronization for example, in order to avoid radio wave interference in the state transition to the period in which data transmission is performed for the period power for power storage, it is possible to stop the output of the carrier 131 and perform data transfer using only the carrier 130 . That is, by synchronizing the stop timing of the carrier 131 with the data transmission start timing by the carrier wave 130, it is possible to transmit only the modulated carrier 130 and transmit data to the tag 120 without interference. This will be described in more detail with reference to FIG.
- FIG. 23 is a diagram illustrating a case where the output of the carrier wave 131 is stopped and the data transfer is performed using only the carrier wave 130 by synchronizing the operation states of the reader devices 600a and 600b.
- the horizontal axis indicates the passage of time.
- an initial storage state 700—response reception state 700 is shown. That is, the initial storage state 700 to the tag 120, the command transmission state 701 to the tag 120, the re-storage state 702 to the tag 120, the response 140 from the tag 120 is received, the response reception state 703, the re-storage state to the tag 120 704, response 140 from tag 120 received
- the response reception status 705 is shown.
- the initial power storage state 700 and the re-power storage states 702 and 704 correspond to steps for supplying power to the tag 120.
- the command transmission state 701 corresponds to a step of transmitting data to the tag 120.
- code A710 to code D715 indicate code changes of the synchronization signal 610.
- the code of the synchronization signal 610 in response to a change in the operating state, includes a code A710 indicating the initial power storage state 700, a code B711 indicating the command transmission state 701, a code C712 indicating the recharge state 702, and a response receiving state.
- the code changes to a code D713 indicating 703, a code C714 indicating the re-storage state 704, and a code D715 indicating the response reception state 705.
- unmodulated transmission 720-unmodulated transmission Z data reception 725 indicates a temporal transition of the operation of reader device 600a.
- the reader device 600a transmits the carrier wave without modulating it in order to store electricity in the tag 120.
- the reader device 600a modulates the carrier wave 130 for command transmission.
- the reader device 600a supplies a carrier wave necessary for the tag 120 to transmit data, and receives data from the tag 120.
- Unmodulated transmission 730 Unmodulated transmission 735 indicates a time transition of the operation of the reader device 600b.
- the reader device 600b transmits the carrier wave 131 without modulation in order to store power in the tag 120.
- the reader device 600b stops the output of the carrier wave 131 in order to avoid interference with command transmission from the reader device 600a.
- the reader device 60 Ob supplies the carrier necessary for the tag 120 to transmit data.
- the control circuit 620a controls the oscillation Z modulation circuit 310a to output the carrier wave 130 having the frequency f0 without modulation (unmodulated transmission 720).
- the code A710 is output as the synchronization signal 610 from the control circuit 620a of the reader device 600a.
- the control circuit 620b inputs the code A710 as the synchronization signal 610.
- the control circuit 620b controls the oscillation Z modulation circuit 310b to output the carrier 131 having the frequency f 1 without modulation (unmodulated transmission 730).
- the control circuit 620a is activated.
- a carrier wave 130 which has been subjected to data modulation with a command to be output is output (modulation transmission 721).
- the control circuit 620a of the reader device 600a outputs the code B711 as the synchronization signal 610.
- the control circuit 620b inputs the code B711 as the synchronization signal 610.
- the control circuit 620b controls the oscillation Z modulation circuit 310b to stop the output of the carrier 131 (transmission stop 731).
- the reader device 600a when the re-charge state 702 is entered, the reader device 600a outputs the carrier wave 130 without modulation (unmodulated transmission 722), and outputs the code C712 as the synchronization signal 610.
- the code C712 is input as the synchronization signal 610, and the carrier wave 131 is output unmodulated (unmodulated transmission 732).
- reader device 600a outputs carrier wave 130 without modulation and receives response 140 from tag 120 (unmodulated transmission Z data reception 723), and receives a synchronization signal.
- the code D713 is output as 610.
- the code D713 is input as the synchronization signal 610, and the carrier wave 131 is output unmodulated (unmodulated transmission 733).
- the operation when moving to the recharge state 704 is the same as in the recharge state 702 (however, the code C714, the unmodulated transmission 724, and the unmodulated transmission 734).
- the operation when moving to the response reception state 705 is the same as that in the response reception state 703 (however, the code D 715, the unmodulated transmission Z data reception 725, and the unmodulated transmission 735).
- Embodiment 8 relates to an embodiment in which reader devices 600a and 600b transmit data using carrier waves 130 and 131, respectively.
- the system configuration is the same as that of wireless communication system 4000 of the seventh embodiment.
- the reader device 600b is stopped in the case of data transmission.
- the eighth embodiment is characterized in that, in data transmission, both reader apparatuses 600a and 600b transmit data using carrier waves 130 and 131, respectively.
- the mode in which the carrier waves 130 and 131 having different frequencies are simultaneously transmitted in the operation state other than the command transmission state 701 in which a command is transmitted from the reader device 600a to the tag 120 has been described.
- the transmission of the carrier wave 131 by the reader device 600b is stopped and transmitted (transmission stopped state 731).
- the power source power obtained by the tag 120 can be increased so much.
- the modulated carriers 130 and 131 having different frequencies in the command transmission state 701 are simultaneously transmitted, and the tag 120 receives the combined wave of the modulated carriers 130 and 131, and A case where power is generated from the received composite wave will be described.
- FIG. 24 is a diagram illustrating a modulation waveform 520 that modulates the carrier waves 130 and 131.
- FIG. 25 is a diagram showing a combined waveform 521 of a combined wave in which the carrier wave 130 modulated with the modulation waveform 520 and the carrier wave 131 modulated with the modulation waveform 520 are combined.
- FIG. 26 is a flowchart for explaining the operation when the reader apparatuses 600a and 600b transmit data using the carrier waves 130 and 131, respectively.
- the reader devices 600a and 600b Upon receiving a request from the host 100, the reader devices 600a and 600b operate in the same manner as in the seventh embodiment up to the initial power storage state 700. In the subsequent command transmission state 701, the reader devices 600a and 600b transmit data synchronously. At this time, the reader device 600a transmits a modulation waveform 520 corresponding to transmission data (command or the like) to the reader device 600b as a synchronization signal 610 in addition to the code B711 indicating the operation state.
- the control circuit 620a controls the oscillation Z modulation circuit 310a so that the oscillation Z modulation circuit 310a modulates the carrier wave 130 using the modulation waveform 520 and transmits data. At that time, the control circuit 620a of the reader device 600a uses the modulation waveform 520 described above. It outputs as a period signal 610 (S601, S602).
- the control circuit 620b inputs the modulation waveform 520 as the synchronization signal 610. Based on the input modulation waveform 520, the control circuit 620b modulates the carrier 131 in the oscillation Z modulation circuit 31 Ob and transmits data (S603).
- the reader devices 600a and 600b transmit the modulated carriers 130 and 131 (S604).
- the tag 120 receives this synthesized wave and generates electric power using the received synthesized wave. Further, the tag 120 receives this composite wave and demodulates transmission data (command or the like) by the demodulation circuit 420.
- the reader device can perform data transmission to the tag with the reader device power by synchronizing and modulating a plurality of carrier waves to be transmitted. Further, since the amplitude of the radio wave received by the tag during that period can be increased, the communication distance between the reader device and the tag can be increased. Furthermore, since the tag receives the combined wave having an increased amplitude and rectifies the received combined wave to obtain power, the acquired power can be increased. Therefore, the communication distance between the reader device and the tag can be increased.
- the case has been described in which the reader device 600a and the reader device 600b are synchronized with each other in the configuration of the wireless communication system 4000 shown in FIG. That is, the case where a plurality of reader devices are synchronized has been described.
- a single reader device may synchronize the transmission of the carrier waves 130 and 131. Even when a single reader device synchronizes, the same effect as in the case of a plurality of reader devices can be obtained.
- the reader device 600b when the reader device 600a transmits data, the reader device 600b stops transmitting the carrier wave 131 by synchronizing. Also in the case of a single reader device, transmission of the carrier 131 can be stopped as in the seventh embodiment. That is, in the reader device 110 in FIG. 7 and the reader device 111 shown in FIG. 11, each control circuit 300 transmits the carrier wave 130 by the oscillation Z modulation circuit 310 and the carrier wave 131 by the oscillation Z modulation circuit 311. Control to synchronize with the transmission of. Due to the synchronization control by the control circuit 300, the transmission of the oscillation Z modulation circuit 311 is stopped, and only the oscillation Z modulation circuit 310 receives the data. By performing data transmission, a system similar to that of Embodiment 7 can be obtained by a single reader device.
- each control circuit 300 performs transmission of the carrier wave 130 by the oscillation Z modulation circuit 310 and transmission of the carrier wave 131 by the oscillation Z modulation circuit 311. Perform control to synchronize.
- Each control circuit 300 causes the oscillation Z modulation circuit 310 and the oscillation Z modulation circuit 311 to modulate the carrier wave 130 and the carrier wave 131 in synchronization using the modulation waveform 520. Control of synchronized modulation by the control circuit 300 allows data transmission by both of the carriers 130 and 131. Therefore, a system similar to that of Embodiment 8 can be obtained with a single reader device.
- a plurality of carrier waves are synthesized for the purpose of increasing the communication distance by increasing the amplitude, but instead of increasing the amplitude, the output of the reader device may be reduced to reduce the cost.
- the carrier wave transmitted by the reader device which is necessary for supplying the operation power to the tag and for the tag to transmit data, may or may not be modulated.
- the modulation method of the carrier used by the reader device for data transmission is not limited. For example, amplitude modulation, frequency modulation, or the like may be used, or modulation may be performed using a plurality of carriers. Also, the modulation method of the carrier used by the tag for data transmission is not limited. [0118] Further, the method of synchronizing a plurality of carriers is not limited to the above, and may be another method. For example, the synchronization signal may be wired or wireless.
- the configurations of the communication device and the tag are not limited to the above, and may be other configurations.
- the transmitting antenna and the receiving antenna may have different configurations, or the transmitting device and the receiving device may have different configurations.
- the reader device may be provided with a function of writing data to a tag or a function of erasing data.
- the tag may have a function of transferring data other than the identifier! ,.
- the configuration of the wireless communication system is not limited to the above, and the number of hosts, reader devices, and tags may be any combination. Also, the connection between the host and the reader device can be made by any method, for example, a dedicated line or a wireless or wired network.
- a function equivalent to the host may be incorporated in the reader device.
- the present invention is not limited to a wireless ID system using a tag, and may be another configuration such as a non-contact IC card system.
- an interrogator having a function of transmitting radio waves and supplying power to a responder (tag) and a function of receiving data on the responder (tag).
- a responder that receives radio wave power received from the interrogator (reader device) and transmits data, and responds by simultaneously transmitting multiple carriers of different frequencies. Power is supplied to the device (tag).
- the interrogator transmits a plurality of carriers using a single amplifier that amplifies the carrier and a single antenna that transmits the carrier. It is characterized by.
- the interrogator transmits a plurality of carrier waves using a plurality of amplifiers that amplify the carrier waves.
- the radio communication system of the above embodiment is characterized in that the interrogator (reader apparatus) transmits a plurality of carrier waves using a plurality of antennas that transmit the carrier waves.
- the wireless communication system of the above embodiment is characterized in that a plurality of carrier waves are transmitted using a plurality of interrogators (reader devices).
- the radio communication system of the above embodiment is characterized in that the responder (tag) obtains the operating power of the circuit from the combined wave of a plurality of carrier waves transmitted by the interrogator (reader device).
- the responder (tag) modulates a plurality of carrier waves transmitted by the interrogator (reader device), and the interrogator (reader device) demodulates the modulated carrier waves.
- the interrogator reader device
- the wireless communication system of the above embodiment is characterized in that it has a function of changing a plurality of carrier waves transmitted by an interrogator (reader device) in synchronization.
- the step of supplying power from the interrogator (reader device) to the responder (tag) and the data transmission from the interrogator (reader device) to the responder (tag) A step of supplying power to the responder (tag) by a plurality of carriers in the step of supplying power, and one of the plurality of carriers in the step of transmitting data.
- the data communication is performed by modulating the signal, and the other carrier waves are stopped in synchronization with the shift to the step of data transmission.
- the step of supplying power from the interrogator (reader device) to the responder (tag) and the data from the interrogator (reader device) to the responder (tag) A step of performing transmission,
- the responder In the step of supplying power, the responder is supplied with power by a plurality of carriers, and in the step of transmitting data, the data transmission is performed by modulating the plurality of carriers in synchronization. .
- the wireless data communication method of the above embodiment has an interrogator (reader device) having a function of transmitting electric waves and supplying power to a responder (tag) and a function of receiving data of the responder (tag). ) And a responder (tag) that obtains the radio wave power received from the interrogator (reader device) and transmits data, and responds by simultaneously transmitting multiple carriers of different frequencies. It is characterized by supplying power to the (tag).
- FIG. 1 is a configuration diagram of a wireless communication system 1000 according to a first embodiment.
- FIG. 3 is a diagram showing a waveform 200 of a carrier wave 130 in Embodiment 1.
- FIG. 3 is a diagram showing a waveform 200 of a carrier wave 130 in Embodiment 1.
- FIG. 4 shows a waveform 201 of a carrier wave 131 in the first embodiment.
- FIG. 5 is a diagram showing a combined waveform 210 of a waveform 200 and a waveform 201 in the first embodiment.
- FIG. 6 is a diagram for explaining output power of carrier waves 130 and 131 by reader apparatus 110 in the first embodiment.
- FIG. 7 is a configuration diagram of a reader device 110 according to the second embodiment.
- FIG. 8 is a flowchart showing an operation of the reader device 110 in the second embodiment.
- FIG. 9 is a flowchart showing the operation of the reader device 110 in the second embodiment.
- FIG. 10 is a configuration diagram of a wireless communication system 2000 according to the third embodiment.
- FIG. 11 is a configuration diagram of a reader device 111 in the third embodiment.
- FIG. 12 is a configuration diagram of a wireless communication system 3000 according to the fourth embodiment.
- FIG. 13 is a configuration diagram of a reader device 401a according to the fourth embodiment.
- FIG. 14 is a configuration diagram of a tag 120 in the fifth embodiment.
- FIG. 15 is a diagram showing a configuration example of a power supply circuit 410 of the tag 120 in the fifth embodiment.
- FIG. 16 is a flowchart showing the operation of the tag 120 in the fifth embodiment.
- FIG. 17 is a diagram showing a composite waveform 500 in the sixth embodiment.
- FIG. 18 shows a modulation waveform 510 in the sixth embodiment.
- FIG. 19 shows a response waveform 511 in the sixth embodiment.
- FIG. 20 is a configuration diagram of a wireless communication system 4000 in the seventh embodiment.
- FIG. 21 is a diagram for explaining synchronization between the reader device 600a and the reader device 600b in the seventh embodiment.
- Embodiment 7 is a diagram for explaining synchronization between the reader device 600a and the reader device 600b in the seventh embodiment.
- FIG. 22 is a sequence diagram showing an operation of radio communication system 4000 in the seventh embodiment.
- FIG. 24 is a diagram showing a modulation waveform 520 in the eighth embodiment.
- FIG. 25 is a diagram showing a composite waveform 521 in the eighth embodiment.
- FIG. 26 shows an operation sequence of reader devices 600a and 600b in the eighth embodiment.
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Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006534981A JP4271237B2 (ja) | 2004-09-15 | 2004-09-15 | 無線通信システム及び電力生成装置及び通信装置 |
| PCT/JP2004/013412 WO2006030497A1 (ja) | 2004-09-15 | 2004-09-15 | 無線通信システム及び電力生成装置及び通信装置及び電力生成方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2004/013412 WO2006030497A1 (ja) | 2004-09-15 | 2004-09-15 | 無線通信システム及び電力生成装置及び通信装置及び電力生成方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006030497A1 true WO2006030497A1 (ja) | 2006-03-23 |
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|---|---|---|---|
| PCT/JP2004/013412 Ceased WO2006030497A1 (ja) | 2004-09-15 | 2004-09-15 | 無線通信システム及び電力生成装置及び通信装置及び電力生成方法 |
Country Status (2)
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| JP (1) | JP4271237B2 (ja) |
| WO (1) | WO2006030497A1 (ja) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2306653C1 (ru) * | 2006-04-20 | 2007-09-20 | Олег Валерьевич Белянин | Беспроводная зарядная система с обратной связью |
| JP2009021848A (ja) * | 2007-07-12 | 2009-01-29 | Denso Wave Inc | Rfidタグシステム,タグリーダ,同期装置 |
| JP2009129445A (ja) * | 2007-11-27 | 2009-06-11 | Korea Electronics Telecommun | Rfidリーダー管理装置及び方法 |
| JP2011234414A (ja) * | 2011-07-27 | 2011-11-17 | Toshiba Corp | 遠隔制御システム、電子機器及び電子機器の制御方法 |
| JP2020088923A (ja) * | 2018-11-16 | 2020-06-04 | 株式会社村田製作所 | 環境発電装置 |
| JP2021043830A (ja) * | 2019-09-13 | 2021-03-18 | 東芝テック株式会社 | 無線タグ読取装置 |
| WO2026048018A1 (ja) * | 2024-08-30 | 2026-03-05 | 1Finity株式会社 | 受信装置、送信装置、及び無線電力伝送システム |
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| KR101784683B1 (ko) * | 2015-04-16 | 2017-10-13 | (주)티엘씨테크놀로지 | 효율적인 무선전력 전송을 이용한 열차위치검지시스템 및 그 방법 |
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| JPH08149867A (ja) * | 1991-09-12 | 1996-06-07 | Chushiro Shindo | 電力エネルギー増大装置 |
| JP2003134698A (ja) * | 2001-10-16 | 2003-05-09 | Mitsubishi Electric Corp | 宇宙太陽光発電システム |
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| RU2306653C1 (ru) * | 2006-04-20 | 2007-09-20 | Олег Валерьевич Белянин | Беспроводная зарядная система с обратной связью |
| WO2007123433A1 (fr) * | 2006-04-20 | 2007-11-01 | Oleg Valerievich Belyanin | Système de chargement sans fil avec rétroaction |
| JP2009021848A (ja) * | 2007-07-12 | 2009-01-29 | Denso Wave Inc | Rfidタグシステム,タグリーダ,同期装置 |
| JP2009129445A (ja) * | 2007-11-27 | 2009-06-11 | Korea Electronics Telecommun | Rfidリーダー管理装置及び方法 |
| US8299898B2 (en) | 2007-11-27 | 2012-10-30 | Electronics And Telecommunications Research Institute | Apparatus and method for managing radio frequency indentification reader |
| JP2011234414A (ja) * | 2011-07-27 | 2011-11-17 | Toshiba Corp | 遠隔制御システム、電子機器及び電子機器の制御方法 |
| JP2020088923A (ja) * | 2018-11-16 | 2020-06-04 | 株式会社村田製作所 | 環境発電装置 |
| JP2021043830A (ja) * | 2019-09-13 | 2021-03-18 | 東芝テック株式会社 | 無線タグ読取装置 |
| JP7449057B2 (ja) | 2019-09-13 | 2024-03-13 | 東芝テック株式会社 | 無線タグ読取装置 |
| WO2026048018A1 (ja) * | 2024-08-30 | 2026-03-05 | 1Finity株式会社 | 受信装置、送信装置、及び無線電力伝送システム |
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| Publication number | Publication date |
|---|---|
| JP4271237B2 (ja) | 2009-06-03 |
| JPWO2006030497A1 (ja) | 2008-05-08 |
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