WO2006006201A1 - 無線タグおよび無線タグ用チップ - Google Patents
無線タグおよび無線タグ用チップ Download PDFInfo
- Publication number
- WO2006006201A1 WO2006006201A1 PCT/JP2004/009646 JP2004009646W WO2006006201A1 WO 2006006201 A1 WO2006006201 A1 WO 2006006201A1 JP 2004009646 W JP2004009646 W JP 2004009646W WO 2006006201 A1 WO2006006201 A1 WO 2006006201A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- control circuit
- power supply
- wireless tag
- temperature
- memory
- Prior art date
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0723—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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/022—Means for indicating or recording specially adapted for thermometers for recording
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0716—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising a sensor or an interface to a sensor
- G06K19/0717—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising a sensor or an interface to a sensor the sensor being capable of sensing environmental conditions such as temperature history or pressure
Definitions
- the present invention relates to a wireless tag that transmits and receives data wirelessly and a wireless tag chip that constitutes the wireless tag.
- wireless tags have attracted attention as key devices for realizing a ubiquitous network. Replacing barcodes used for product identification with wireless tags eliminates the need for manual barcode reading.
- the use of wireless tags dramatically improves the efficiency of goods management.
- the wireless tag can be used for the history of the manufacturing process (production process) of the article, the history of the management state during the distribution process, and the like only by identifying the article.
- Japanese Patent Publication No. 2003-333950 discloses a technique for attaching a wireless tag to livestock animals to control the body temperature of livestock animals. This type of wireless tag incorporates a temperature sensor to measure the temperature of livestock animals.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-333950
- An object of the present invention is to accurately measure the temperature of a measurement object to which a wireless tag is attached.
- the data control circuit demodulates received data received by the antenna. At the same time, the transmission data is modulated to be output from the antenna.
- the nonvolatile memory is accessed by the memory control circuit and stores temperature information measured by the temperature sensor.
- the power supply control circuit supplies the first power supply voltage to the temperature sensor in response to the temperature measurement request received via the antenna.
- the power supply control circuit supplies the second power supply voltage to the nonvolatile memory and the memory control circuit after the temperature sensor measures the temperature.
- the nonvolatile memory and the memory control circuit do not operate because the temperature sensor is not measuring the temperature because it does not receive the second power supply voltage.
- the nonvolatile memory and the memory control circuit do not generate heat. For this reason, the temperature sensor can accurately measure the temperature of the wireless tag and its surroundings without being affected by heat generated by the operation of the circuit in the wireless tag.
- the temperature sensor includes an element, an AZD conversion circuit, and a memory circuit.
- the value of the current flowing through the first electrode of the element varies with temperature.
- the voltage value generated at the first electrode of the element varies with temperature.
- the A ZD conversion circuit converts a current value or a voltage value into a digital value.
- the converted digital value is held in the memory circuit as temperature information.
- the memory control circuit reads the temperature information held in the memory circuit and writes the read temperature information to the nonvolatile memory. Since the temperature can be measured using the temperature characteristics of the element, a temperature sensor can be easily configured without using a complicated manufacturing process. As a result, the cost of the wireless tag and the wireless tag chip can be reduced.
- the rectifier circuit converts the radio wave received by the antenna into a DC voltage, and supplies the converted DC voltage as a main power supply voltage to the power supply control circuit.
- the power supply control circuit uses the main power supply voltage as the first and second power supply voltages. Therefore, the wireless tag can operate without mounting a notch or the like and can accurately measure the temperature.
- the power supply control circuit uses the main power supply voltage output from the notch. Used as the first and second supply voltage.
- the data control circuit operates by receiving the main power supply voltage. By incorporating a battery in the wireless tag, the data control circuit can always receive a temperature measurement request. Because it is not necessary to generate the main power supply voltage from the radio waves received by the antenna, the temperature of the object to be measured can be measured quickly using a wireless tag. Can do.
- the data control circuit operates with a main power supply voltage. For this reason, the data control circuit starts operation immediately after the main power supply voltage is generated by the rectifier circuit and can receive the temperature measurement request.
- the distance between the temperature sensor and the data control circuit is longer than the distance between the temperature sensor and at least one of the memory control circuit and the nonvolatile memory.
- at least one of the memory control circuit and the nonvolatile memory is arranged between the temperature sensor and the data control circuit.
- the distance between the temperature sensor and the power supply control circuit is longer than the distance between the temperature sensor and at least one of the memory control circuit and the nonvolatile memory.
- at least one of the memory control circuit and the nonvolatile memory is arranged between the temperature sensor and the power supply control circuit. Therefore, the temperature sensor can be prevented from being affected by the heat generated by the data control circuit and the power supply control circuit. As a result, the wireless tag and its surrounding temperature can be accurately measured.
- FIG. 1 is a block diagram showing a first embodiment of a wireless tag and a wireless tag chip according to the present invention.
- FIG. 2 is a block diagram showing details of the temperature sensor shown in FIG.
- FIG. 3 A characteristic showing the temperature dependence of the drain current flowing in the nMOS transistor shown in Fig. 2.
- FIG. 4 is a timing chart showing the operation of the wireless tag of the first embodiment.
- FIG. 5 is a block diagram showing a main part of a wireless tag and a wireless tag chip according to a second embodiment of the present invention.
- FIG. 6 is a block diagram showing a third embodiment of the wireless tag and the wireless tag chip of the invention.
- FIG. 7 is a timing chart showing an operation of the wireless tag of the third embodiment.
- FIG. 1 shows a first embodiment of a wireless tag and a wireless tag chip of the present invention.
- the wireless tag is composed of a resin plate (not shown) on which the dipole antenna 100, the wireless tag chip 200, and the wireless tag chip 200 are mounted.
- the dipole antenna 100 is formed by printing a metal foil on a resin board.
- the wireless tag chip 200 is formed on a silicon substrate using a CMOS process.
- the thickness of the RFID tag chip 200 is set to 100 m by polishing the back surface of the silicon wafer. In this embodiment, the force that sets the thickness of the chip to 100 m. By further reducing the thickness of the chip, the thermal resistance in the direction along the surface of the silicon substrate increases. Therefore, it is possible to minimize the heat generated by the operation of the circuit from being transferred to other circuits through the silicon substrate.
- the wireless tag is attached to the fresh food product before shipment of the fresh food product (vegetables, meat, milk, etc.).
- the temperature of the fresh food measured during the distribution process after shipment is sequentially stored in the wireless tag. Temperature is measured in truck beds during transport of fresh food, in warehouses storing fresh food, and in showcases at shops.
- the temperature measurement is performed in response to a temperature measurement request sent from the reader Z writer 300 by radio.
- the Reader Z Writer 300 is installed in the truck bed, warehouse, showcase, etc. for measuring temperature.
- the communication between the reader Z writer 300 and the wireless tag is performed using a carrier frequency of, for example, 950-956 MHz (UHF band), and the communication distance is 1 to 15 m.
- the reader Z writer 300 transmits power and data to the wireless tag.
- the wireless tag chip 200 includes an antenna terminal 10 for connecting the dipole antenna 100, a rectifier circuit 12, a power supply control circuit 14, an operation control circuit 16, a ferroelectric memory (nonvolatile memory) 18, and a temperature sensor 20 And a data control circuit 22.
- the rectifier circuit 12 rectifies AC radio waves (AC current) received by the dipole antenna 100 to generate a DC voltage.
- the electric charge generated by the rectification is accumulated in a smoothing capacitor (not shown).
- the rectified voltage is smoothed by the smoothing capacitor, and a stable main power supply voltage VDD is generated on the power supply line.
- the power supply control circuit 14 is operable while receiving the main power supply voltage VDD supplied from the rectifier circuit 12.
- the power supply control circuit 14 is connected to the reader Z writer via the data control circuit 22.
- the main power supply voltage VDD is sequentially output as the first power supply voltage VDD1 and the second power supply voltage VDD2.
- the power supply control circuit 14 has a function of maintaining the values of the first power supply voltage VDD1 and the second power supply voltage VDD2 constant regardless of the temperature.
- the operation control circuit 16 controls the operation of the entire wireless tag.
- the operation control circuit 16 also operates as a memory control circuit that accesses the strong dielectric memory 18 (performs a write operation and a read operation).
- the operation control circuit 16 is operable while receiving the second power supply voltage VDD2.
- the ferroelectric memory 18 has unique information on the item with the wireless tag (for example, in the case of food products, the production area, producer name, shipping date, etc.) ) And a temperature control area for writing the temperature of foodstuffs measured every 10 minutes in the distribution / distribution process.
- the ferroelectric memory 18 is operable while receiving the second power supply voltage VDD2.
- the data written in the ferroelectric memory 18 is read by the reader Z writer 300.
- the temperature sensor 20 starts operating upon receiving the supply of the first power supply voltage VDD1, and measures the temperature of the wireless tag. Temperature information TPI indicating the temperature of the wireless tag is written into the ferroelectric memory 18 via the operation control circuit 16.
- the data control circuit 22 includes a data demodulation circuit 24, a data modulation circuit 26, and a clock extraction circuit 28.
- the data demodulation circuit 24 demodulates data received via the dipole antenna 100 and outputs the demodulated data DT to the operation control circuit 16.
- the data supplied to the wireless tag includes foodstuff specific information and temperature measurement requests.
- the data modulation circuit 26 modulates the data DT from the operation control circuit 16.
- the modulated data is output to the reader / writer 300 via the dipole antenna 100.
- the clock extraction circuit 28 also extracts the clock from the radio wave power received by the dipole antenna 100 and outputs the extracted clock to the operation control circuit 16.
- the operation control circuit 16 and the ferroelectric memory 18 are arranged between the temperature sensor 20, the data control circuit 22, and the power supply control circuit 14. That is, the distance between the temperature sensor 20 and the data control circuit 22 and the distance between the temperature sensor 20 and the power supply control circuit 14 are The distance between the temperature sensor 20 and the operation control circuit 16 and the ferroelectric memory 18 is longer. Specifically, the temperature sensor 20 and the data control circuit 22, and the temperature sensor 20 and the power supply control circuit 14 are formed at a distance of 50 m or more.
- the data control circuit 22 and the power supply control circuit 14 are circuits necessary for receiving a temperature measurement request, and must be operated before the temperature sensor 20 starts operating. By installing a circuit that operates faster than the temperature sensor 20 on the RFID tag chip 200 away from the temperature sensor 20, the temperature sensor 20 is affected by the heat generated by the data control circuit 22 and the power supply control circuit 14. Can be prevented. Further, as described above, even by reducing the thickness of the silicon substrate, it is difficult to be affected by the heat generated from the data control circuit 22 and the power supply control circuit 14. As a result, the temperature of an article such as food can be accurately measured.
- FIG. 2 shows details of the temperature sensor 20 shown in FIG.
- the temperature sensor 20 includes a current monitor circuit 30, an AZD conversion circuit 32, a latch circuit 34 (memory circuit), and an nMOS transistor NM1.
- the drain and gate of the nMOS transistor NM1 are connected to the first power supply voltage line VDD1 via the current monitor circuit 30.
- the source of the nMOS transistor NM1 is connected to the ground line VSS.
- the gate voltage VG of the nMOS transistor NM1 is constant regardless of the temperature equal to the first power supply voltage VDD1. For this reason, the gate-source voltage of the nMOS transistor NM1 is constant.
- the drain current ID flowing to the drain (first electrode) of the nMOS transistor NM1 increases as the temperature increases and decreases as the temperature decreases.
- the temperature sensor 20 is easily realized using a general CMOS process.
- the current monitor circuit 30 converts the drain current ID into a voltage value VTP, and outputs the converted voltage value VTP to the AZD conversion circuit 32.
- the AZD conversion circuit 32 converts the voltage value VTP to the digital value TP, and outputs the converted digital value TP to the latch circuit 34. That is, the AZD conversion circuit 32 converts the drain current ID that changes depending on the temperature of the wireless tag into a digital value TP.
- the latch circuit 34 holds the digital value TP as temperature information TPI indicating the temperature of the wireless tag, and outputs the held temperature information TPI to the operation control circuit 16 shown in FIG.
- FIG. 3 shows the temperature dependence of the drain current ID flowing through the nMOS transistor NM1 shown in FIG.
- FIG. 4 shows the operation of the wireless tag of the first embodiment.
- the operation shown in FIG. 4 is performed, for example, by the reader Z writer 300 installed in the truck bed transmitting a power and temperature measurement request to each wireless tag every 10 minutes.
- power and temperature measurement requests are sent to the wireless tag at similar intervals.
- the rectifier circuit 12 of the wireless tag receives the radio wave (electric power) from the reader Z writer 300 and generates the main power supply voltage VDD (FIG. 4 (a)).
- the power supply control circuit 14 and the data control circuit 22 are activated in response to the main power supply voltage VDD and become operable.
- the data control circuit 22 outputs a request signal REQ to the power supply control circuit 14 (FIG. 4 (b)).
- the nMOS transistor NM 1 of the temperature sensor 20 shown in FIG. 2 receives the first power supply voltage VDD1 at its drain and gate, and generates a drain current ID corresponding to the temperature of the wireless tag (FIG. 4 (d)).
- the current monitor circuit 30 converts the drain current ID into a voltage VTP (Fig. 4 (e)).
- the AZD conversion circuit 32 converts the voltage value VTP into a digital value TP.
- the latch circuit 34 latches the digital value TP and outputs the latched value as temperature information TP I (FIG. 4 (f)).
- the operation control circuit 16 shown in FIG. 1 writes the temperature information TPI received from the temperature sensor 20 into the ferroelectric memory 18 (FIG. 4 (h)). In the ferroelectric memory 18, temperature information TPI is sequentially written for each temperature measurement request.
- the wireless tag transmits / receives necessary data to / from the reader Z writer 300 and accesses the ferroelectric memory 18.
- the necessary data are the time when the temperature measurement request is issued, the measurement location, and the like.
- the reader Z writer 300 ends the transmission of power.
- the rectifier circuit 12 stops outputting the main power supply voltage VDD (FIG. 4 (i)).
- the wireless tag stops operating when the main power supply voltage VDD stops.
- the temperature sensor 20 before the second power supply voltage VDD2 is supplied to the operation control circuit 16 and the ferroelectric memory 18, the temperature sensor 20 is operated and the temperature is measured. Therefore, the temperature sensor 20 can accurately measure the temperature of the fresh food product without being affected by heat generated by the operation of the operation control circuit 16 and the ferroelectric memory 18.
- the temperature sensor 20 can be easily configured using only an existing CMOS process without using a complicated manufacturing process. As a result, the cost of the wireless tag and the wireless tag chip can be reduced.
- the wireless tag By converting the radio wave (power) received by the dipole antenna 100 into the main power supply voltage VDD using the rectifier circuit 12, the wireless tag can be operated without mounting a notch and the like, and Accurate temperature can be measured.
- the data control circuit 22 can start operation immediately after the rectifier circuit 12 generates the main power supply voltage VDD, and can receive a temperature measurement request. .
- FIG. 5 shows a main part of a second embodiment of the wireless tag and the wireless tag chip of the present invention. The same elements as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the RFID tag chip of this embodiment has a temperature sensor 20A instead of the temperature sensor 20 of the first embodiment.
- Other configurations are the same as those of the wireless tag and the wireless tag chip of the first embodiment. That is, the wireless tag includes the dipole antenna 100 shown in FIG. 1, the wireless tag chip, and a resin plate (not shown) on which these components are mounted.
- the wireless tag chip includes an antenna terminal 10, a rectifier circuit 12, a power supply control circuit 14, an operation control circuit 16, a ferroelectric memory 18, a temperature sensor 20A, and a data control circuit 22.
- the wireless tag is attached to the fresh food product before shipment of the fresh food product (vegetables, meat, milk, etc.), for example.
- the temperature of the fresh food product measured in the distribution process after shipment is sequentially stored in the wireless tag.
- the temperature sensor 20A has a voltage monitor circuit 30A instead of the current monitor circuit 30 of the first embodiment.
- the other configuration of the temperature sensor 20A is the same as that of the temperature sensor 20 of the first embodiment. That is, the temperature sensor 20A includes an nMOS transistor NM1, a voltage monitor circuit 30A, an AZD conversion circuit 32, and a latch circuit 34.
- the source of the nMOS transistor NM1 is connected to the ground line VSS.
- the drain and gate of the nMOS transistor NM1 are connected to the first power supply voltage line VDD1.
- the nMOS transistor NM1 operates as a diode.
- the rectifier circuit 12 that outputs the main power supply voltage VDD also operates as a constant current source. Since the constant current IC is supplied to the nMOS transistor NM1, the drain voltage VD (drain-source voltage) of the nMOS transistor NM1 changes depending on the temperature.
- the voltage monitor circuit 30A converts the drain voltage VD into a voltage value VTP, and outputs the converted voltage value VTP to the AZD conversion circuit 32.
- the AZD conversion circuit 32 converts the voltage value VTP into the digital value TP, and outputs the converted digital value TP to the latch circuit 34.
- the latch circuit 34 holds the digital value TP as temperature information TPI indicating the temperature of the wireless tag, and outputs the temperature information TPI to the operation control circuit 16 shown in FIG. In this embodiment as well, the same effect as in the first embodiment described above can be obtained.
- FIG. 6 shows a third embodiment of the wireless tag and the wireless tag chip of the present invention.
- the same elements as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the wireless tag of this embodiment has a notch 36 in addition to the dipole antenna 100 and the wireless tag chip 200B.
- the wireless tag chip 200B is configured by omitting the rectifier circuit 12 of the first embodiment.
- Other configurations are the same as those of the wireless tag and the wireless tag chip of the first embodiment. That is, the RFID tag chip 200B has an antenna terminal 10, a power supply control circuit 14, an operation control circuit 16, a ferroelectric memory 18, a temperature sensor 20A, and a data control circuit 22.
- the wireless tag is attached to the fresh food product before shipment of the fresh food product (vegetable, meat, milk, etc.), for example.
- the temperature of the fresh food product measured in the distribution process after shipment is sequentially stored in the wireless tag.
- Power supply control circuit 14 and data control circuit 22 receive main power supply voltage VDD from battery 36 through power supply terminal PS. Therefore, the power supply control circuit 14 and the data control circuit 22 always operate without receiving a radio wave as a power source from the reader Z writer 300.
- FIG. 7 shows the operation of the wireless tag of the third embodiment. Detailed descriptions of the same operations as those in FIG. 4 described above are omitted.
- the operation shown in FIG. 7 is performed, for example, by the reader Z writer 300 installed in the truck bed transmitting power and temperature measurement requests to each wireless tag every 10 minutes. Power and temperature measurement requests are sent to the RFID tag at similar intervals in the warehouse and showcase.
- the same effect as that of the first embodiment described above can be obtained. Furthermore, in this embodiment, a battery 36 is built in the wireless tag, and the main power supply voltage VDD output from the battery 36 is used as the first and second power supply voltages VDD1 and VDD2. For this reason, the data control circuit 22 can always receive a temperature measurement request. Since there is no need to generate the main power supply voltage VDD from radio waves received by the antenna, the temperature of fresh food products can be measured quickly using a wireless tag.
- a temperature sensor is formed using a metal whose resistance (current-voltage characteristics) changes with temperature, an amorphous material such as tungsten silicon nitride, a ferroelectric material such as PZT, or a diode using a PN junction. May be. Since these types of materials and devices are already commonly used in semiconductor manufacturing, they can be easily built into RFID tag chips without the addition of new manufacturing processes.
- the example in which the constant voltage VG is applied between the gate and the source of the nMOS transistor NM1 and the temperature is measured by the drain current ID that changes depending on the temperature has been described.
- the invention is not limited to the powerful embodiments.
- a constant current may be applied to the drain of the nMOS transistor NM1, and the temperature may be measured by a gate voltage that varies depending on the temperature.
- the example in which the constant current IC is applied to the drain of the nMOS transistor NM1 and the temperature is measured by the drain voltage VD that varies depending on the temperature has been described.
- the invention is not limited to the powerful embodiments.
- a constant voltage may be applied between the drain and the source of the nMOS transistor NM1, and the temperature may be measured by a drain current that varies depending on the temperature.
- the example in which the communication between the reader Z writer 300 and the wireless tag is performed using the carrier frequency of 950-956 MHz has been described.
- the present invention is not limited to such an embodiment. It is not specified.
- communication between the reader Z writer 300 and the wireless tag may be performed using a carrier frequency (electromagnetic field) of 13.56 MHz.
- dipole antenna
- a coil-like antenna that is not 100 is mounted on the wireless tag.
- the example in which the dipole antenna 100 is mounted on the wireless tag has been described.
- the invention is not limited to the powerful embodiments. For example, you can mount a Notch antenna on a wireless tag! / ⁇ .
- the present invention By applying the present invention to a wireless tag and a wireless tag chip, the temperature of the wireless tag and its surroundings can be accurately measured.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2006527643A JP4214163B2 (ja) | 2004-07-07 | 2004-07-07 | 無線タグおよび無線タグ用チップ |
PCT/JP2004/009646 WO2006006201A1 (ja) | 2004-07-07 | 2004-07-07 | 無線タグおよび無線タグ用チップ |
US11/599,339 US7554448B2 (en) | 2004-07-07 | 2006-11-15 | RFID transponder and RFID transponder chip |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/009646 WO2006006201A1 (ja) | 2004-07-07 | 2004-07-07 | 無線タグおよび無線タグ用チップ |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/599,339 Continuation US7554448B2 (en) | 2004-07-07 | 2006-11-15 | RFID transponder and RFID transponder chip |
Publications (1)
Publication Number | Publication Date |
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WO2006006201A1 true WO2006006201A1 (ja) | 2006-01-19 |
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PCT/JP2004/009646 WO2006006201A1 (ja) | 2004-07-07 | 2004-07-07 | 無線タグおよび無線タグ用チップ |
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US (1) | US7554448B2 (ja) |
JP (1) | JP4214163B2 (ja) |
WO (1) | WO2006006201A1 (ja) |
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CN102129591B (zh) * | 2011-03-04 | 2013-11-06 | 电子科技大学 | 一种低功耗的有源rfid传感标签及其控制方法 |
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CN103604529A (zh) * | 2013-11-25 | 2014-02-26 | 中国南方电网有限责任公司超高压输电公司天生桥局 | 非接触式换流阀温度在线监测方法及装置 |
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Also Published As
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US20070057771A1 (en) | 2007-03-15 |
JP4214163B2 (ja) | 2009-01-28 |
US7554448B2 (en) | 2009-06-30 |
JPWO2006006201A1 (ja) | 2008-04-24 |
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