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WO2003036552A1 - Systeme de capteur ou de transducteur a distance et dispositif de communication mobile - Google Patents

Systeme de capteur ou de transducteur a distance et dispositif de communication mobile Download PDF

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Publication number
WO2003036552A1
WO2003036552A1 PCT/FI2002/000818 FI0200818W WO03036552A1 WO 2003036552 A1 WO2003036552 A1 WO 2003036552A1 FI 0200818 W FI0200818 W FI 0200818W WO 03036552 A1 WO03036552 A1 WO 03036552A1
Authority
WO
WIPO (PCT)
Prior art keywords
reader device
remote
frequency
mobile terminal
remote identification
Prior art date
Application number
PCT/FI2002/000818
Other languages
English (en)
Inventor
Timo Varpula
Heikki SEPPÄ
Original Assignee
Valtion Teknillinen Tutkimuskeskus
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valtion Teknillinen Tutkimuskeskus filed Critical Valtion Teknillinen Tutkimuskeskus
Publication of WO2003036552A1 publication Critical patent/WO2003036552A1/fr

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Classifications

    • 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
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10346—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the far field type, e.g. HF types or dipoles
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer

Definitions

  • the invention relates to a remote identification or sensor system according to the preamble of claim 1.
  • the invention also relates to a mobile terminal.
  • the invention is utilized in the identification objects and wireless remote reading of their specific data by electromagnetic signals.
  • a remote identification device by definition is a tag that is remotely readable by a radio-frequency signal and comprises an antenna, a circuit for generating the operating voltage, demodulator/modulator circuits of the radio- frequency signal and a memory.
  • the memory is adapted readable by means of RF signal.
  • Remote identification devices fall in different categories: passive and active, whereby the coupling may be inductive, capacitive or by radio frequency electric field.
  • Passive RFID transponders generate their operating power from the radio- frequency field of the incident interrogation signal. Active transponders contain an integral battery.
  • Inductively coupled remote identification devices typically operate at 125 kHz or 13.56 MHz.
  • the present invention concerns passive remote identification devices readable by an RF field.
  • the frequency bands allocated in Europe for this kind of communications are the 868 - 870 MHz band and the 2.4 - 2.4835 GHz band known as the ISM (Industrial Scientific Medical) band.
  • a remote sensor functions substantially in the same way as a remote identification device. Instead of the memory or in addition thereto, the sensor contains circuits for converting the reading of the measured variable (e.g., pressure, temperature and the like) into a form suitable for transmission. Due to wireless reading, remote sensors offer the benefit of operating wirelessly. In practice, sensor cabling and its installation frequently form an investment item much more expensive than the sensor itself.
  • the measured variable e.g., pressure, temperature and the like
  • the goal is to achieve a maximally large distance of read communication.
  • This maximum usable distance of communications is limited by the following factors: 1) authority regulations on the maximum permissible transmission power levels, 2) DC voltage and power consumption of the RFID transponder or remote sensor (only in passive transponders and sensors), 3) signal-to-noise ratio of reply reception at reader, and 4) spurious signals.
  • remote identification applications are generally permitted to operate on the above-mentioned frequency bands using a transmitted power level as low as max. 0.5 W (ERP on the 868 -870 MHz band and EIRP on the 2.45 GHz ISM band). In Finland, the maximum effective radiated power on the ISM band is only 0.1 W.
  • the limit of radiated power on the 915 MHz band is 1 W and, respectively, 4 W on the ISM band at 2.45 GHz.
  • the lower permissible ERP levels of European regulations set severe limitations to the maximum read distance and data transfer rate between the reader and the remote identification device.
  • a rough estimate of power consumption in the microcircuit is at least 5 ⁇ W when the data transfer rate is 4 kbit/s.
  • theoretical maximum read/write distance is limited to less than 4 meters on the 868 - 870 MHz band and to 1.2 meters on the ISM band.
  • the maximum read distances may remain still even substantially shorter than those cited above. Plausibly in the near future, however, a new band will be allocated around 800 MHz for remote identification applications permitting the use of about 2 W ERP. At this power level, there should be no major problem extending the read distance to 4 meters. Clearly, the higher the power level of the interrogation incident on the remote identification device the longer the maximum read distance.
  • the ERP levels permissible for mobile phones are much higher than those permitted for remote identification devices. For instance, the maximum permissible nominal output power of a mobile phone of the second output power class operating in the GSM900 network is 8 W. At this power level, the read distance of a remote identification device can be extended to about 15 m. As a reference, it must be noted herein that the frequency band allocated for GSM900 mobile phones covers 890 - 915 MHz.
  • ERP Equivalent Radiated Power It is an object of the present invention to overcome the above-described problems of the prior art and to provide an entirely novel type of remote identification or sensor sensor system.
  • the goal of the invention is achieved by way of selecting the operating frequency of the reader device to be compatible with the operating frequency of a mobile phone, whereby the antenna of the mobile phone may also be used at the operating frequency of the remote reader device.
  • it is desirable to set the operating frequency of the reader device as close as possible to the operating frequency of a mobile communications system. Good compatibility, however, may also be attained at frequencies falling close to the harmonics (N*f or f/N, N integer) of the operating frequency f of the mobile communications system.
  • the reader device is integrated with a mobile terminal.
  • the energy emitted by a mobile terminal at its normal operating frequency is used for generating the operating power of the interrogated remote identification device or remote sensor.
  • the remote identification device or remote sensor system is characterized by what is stated in the characterizing part of claim 1.
  • a mobile terminal according to the invention is characterized by what is stated in the characterizing part of claim 8.
  • the invention offers significant benefits.
  • a mobile telephone appears to serve as an ideal platform for integrating the relatively simple circuitry of reader electronic. Namely, a mobile phone as such already includes a battery serving as the power supply, a display and RF circuits for transmission and reception. Then if a remote identification device is built around a sensor, the mobile phone replaces the other major components of the sensor such as the sensor battery or respective power source and reader display. In this fashion, a mobile phone can be employed as a user interface toward low-cost remote sensors.
  • the high output power of a GSM phone facilitates remote read over a distance of 4 m and beyond or, alternatively, remote read of a power-hungry sensor at a close distance.
  • Remote identification devices may also be used for locating a mobile phone in interior spaces.
  • the remote identification device senses the field strength of the signal emitted by a GSM phone or an RFID reader, the measured signal strength value is stored in the memory of the RFID device and therefrom further during normal communication back to the GSM phone.
  • the server can compute the location of the mobile phone.
  • the computation could also take place in the mobile phone with the provision that the coordinate data of the remote identification devices are loaded into the mobile phone.
  • the method can reach a location uncertainty even smaller than 30 cm if the antennas of the remote identifica- tion devices are designed to receive signals in different polarizations. While large spaces may need a great number of remote identification devices, they are low-cost and easy-to-mount items.
  • FIG. 1 is an illustrative diagram of a conventional remote identification/sensor system
  • FIG. 2 is an illustrative diagram of a system according to the invention.
  • a remote identification device RFID transponder
  • RFID transponder is a miniature tag device comprising an antenna connected to a microcircuit with a memory that can respond by sending the contents of its memory by backscatter communications responsive to an interrogation signal received from an interrogating reader device when the transponder of the tag device is scanned by an RF signal emitted by the reader.
  • a passive RFID transponder has no battery, but instead it captures its operating power from the radio-frequency field of the interrogation signal sent toward its direction by the reader device. Energy transfer and information transmission between the remote identification device and the reader device may take place using a magnetic field, an electric field or an emitted radio- frequency signal.
  • the RFID transponder is responsive to the incident interrogation signal of the reader device by backscattering the RF signal emitted by the reader device, the response signal of the remote identification device is very weak. Hence, it is essential to achieve a maximally high signal-to-noise ratio and immunity to spurious signals in the communication between the remote identification device and the reader.
  • a typical remote identification system shown therein comprises a reader device 10 and a remote identification device 20 arranged to communicate wirelessly with each other.
  • reader device 10 includes a processor 11, a demodulator 12 and RF circuitry 13 with an antenna 14 for generating an RF signal and receiving the same.
  • the remote identification device 20 respectively comprises an antenna 21, a matching circuit 22, a rectifier and detector circuit 23 and a logic circuit 24. Cooperation of logic circuit 24 with matching circuit 22 takes care of the modulation functions.
  • the remote identification device 20 is typically constructed on a thin, laminated substrate, generally in a credit card size. Now referring to FIG.
  • a typical remote identification/sensor system comprises remote identification devices or sensors 1 with an integrated antenna 2 and a mobile terminal 4 complemented with reader means for remote read.
  • the mobile terminal 4 such as a mobile phone 4, respectively includes a reader means 5 and an antenna 3.
  • Other typical components of the mobile terminal 4 are a transmitter and a receiver, as well as the supplementary electronics circuitry thereof with software, and an antenna 3 suited for mobile communications at an operating frequency f 2 .
  • the mobile terminal includes a battery serving as a power source of electric energy supply for the electronics of the transmitter and receiver sections.
  • the present mobile terminals include also a display.
  • the mobile terminal 4 communicates at frequency fi and the reader at frequency f 2 .
  • the operating frequencies fi and f 2 are selected such that both systems can use the same antennas 2 and 3.
  • the type of antennas is selected to be sufficiently wideband for send/receive on both frequencies. Typically, the frequencies are selected to be quite close to each other.
  • a remote identification system may use the 869 MHz (f 2 ) frequency band, while the 890 - 915 Mhz (fj) frequency band is allocated for mobile terminal communications. If the mobile phone does not commumcate at the GSM frequencies fi when a remote identification device is being interrogated, the remote identification devices (RFID circuits thereof) can capture energy for their operating voltage from the RF field emitted by the mobile phone at the frequencies f 2 reserved for the remote identification system.
  • the operating power of the remote identification devices may alternatively be generated from the RF field emitted by the mobile phone at its communications frequency fj.
  • This optional operating mode obviously must then be taken into account when designing the antenna of the RFID device.
  • communications between the remote identification device or sensor 1 and the reader 5 takes place on the frequency band f 2 allocated for remote identification systems.
  • emissions at frequency fj only offer alternative source for generating electric energy in the remote identification device or sensor 1.
  • Attenua- tion values are so high that it is impossible to interrogate a remote identification device located in the core of a 2 m dia. newsprint roll on neither of the frequency bands at the power levels allocated for remote identification systems.
  • interrogation becomes possible if the maximum permissible 8 W ERP level of GSM phones is used and, additionally, is focused on the RFID device by means of direc- tional antenna.
  • a mobile phone can serve a dual function by both providing operating power for an RFID device and supporting an automated logistics control system in a warehouse. With the help of the mobile phone, the information of a roll being transferred may be forwarded from, e.g., a moving truck to the computer running the warehouse inventory program.
  • a three-phase electric power transmission network is monitored by measuring phase-leg currents and line voltages in the terrain.
  • This task can be carried out readily using, e.g., a measurement method based on remote sensors in the fashion discussed below.
  • Passive voltage and current sensors attached to the high-potential conductors of the line are interrogated from the ground level by a reader connected to a mobile phone.
  • the measurement results are automatically sent over the GSM network to a monitoring relay station.
  • a plurality of similar monitoring systems of critical variables may be found in process industries. With the help of the novel sensors, installa- tion becomes easy inasmuch as no cabling is needed.
  • the earpiece of a mobile phone is also replaceable with a wirelessly operating micro- phone.
  • a small passive or battery-powered microphone is placed in the ear.
  • the mobile phone is hung on the user's belt thus minimizing the RF field intensity incident on the user's head.
  • the mobile phone identifies the RFID code of the remote microphone device and commands the device to generate a voice signal responsive to the digital data sent to the device on the remote identification system frequency band f 2 .
  • a typical service meter located in customer premises comprises a sensor, read electronics and a display. Additionally, the meter needs operating power that is supplied by the mains, a battery (or a rechargeable battery). Frequently, the sensor forms only a fraction of overall manufacturing cost of the meter.
  • a system can be established wherein a mobile phone can be used for reading measurement data so that the mobile phone (operating on an GSM or RFID frequency band) provides the operating power of the sensor device (thus substituting a battery), the processor of the mobile telephone set performs linearization and the like processing of the measurement data (thus substituting the processor of the sensor device) and the remotely interrogated measurement data can be displayed on the display of the mobile telephone (thus substituting the display of the service meter), complemented with the possibility of wirelessly sending forward the sensor measurement data (thus substituting the communications channel of the service meter).
  • a simple service meter now costing 50 FBVI to 500 FIM could be implemented at a production cost of 5 FDVI to 10 FIM.
  • An example of such a device is a hospital-grade thermometer.
  • Today, a modern thermometer that rapidly measures the patient's temperature from his/her ear by means of an infrared radiation sensor and costs about 500 FIM could be replaced at the cost of 5 FBVI with a disposable or reusable sensor pad made on a polymer substrate suitable for placing in the patient's mouth, armpit or on the skin under clothing. Then, there is only needed a mobile phone placed nearby for monitoring the patient's temperature.
  • the mobile phone When momtoring the temperature of babies, the mobile phone could be left alongside the baby patient and armed to issue an alarm if the baby patient's temperature exceed a predetermined limit. Also sweating, heart rate, etc. are measurable in the same fashion. Diapers can be sensed for their moisture content, the temperature of ham being baked can be measured prior to baking and when heating in the oven, etc. Obviously, the number of possible applications is huge. The method proposed herein is applicable to both consumer-related business and industrial purposes including product inspection and the like control/monitoring needs.
  • a corridor or similar relatively narrow space having a width of less than 6 m, for instance
  • plural low-cost remote identification device stickers each costing less than 10 FIM displaced at, e.g., 3 m from each other
  • a mobile phone can identify its location rather accurately. At its best, the location uncertainty is about 30 cm, while the greatest location error is about 1 m.
  • One alternative possibility is to design the RFID devices such that they can store their location relative to the coordinates of the building and sense the intensity of the RF field incident thereon. Next, the measurement values of the incident RF field are compressed by taking the logarithm thereof with the help of, e.g., a conversion table, before the values are stored in the memory of the RFID device.
  • the value of incident field strength can be transmitted using a word length of 4 bits only.
  • the location system outlined herein may not be the best possible conceivable by means of RF technology in interior premises, it yet excels by its extremely fast and cost-efficient installation for mobile phones equipped with an integral reader function of RFID devices inasmuch as RFID devices are very cheap and their location can be stored wirelessly in each of them immediately after their attachment.
  • the operating power to an RFID device or sensor may also be supplied by an external RF field such that emitted from a leaky cable.
  • an external RF field such that emitted from a leaky cable.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Selective Calling Equipment (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un système d'identification à distance ou de capteur. Ce système comprend un dispositif (5) de lecture capable d'émettre et de recevoir des informations sans fil, au moyen d'émissions électromagnétiques, et au moins un dispositif d'identification à distance ou un capteur (1), conçu pour générer son énergie de fonctionnement à partir d'un rayonnement électromagnétique incident, et communiquer sans fil avec le dispositif (5) de lecture par l'intermédiaire d'au moins une fréquence (f2). Ce dispositif (5) de lecture est intégré dans un terminal (4) mobile.
PCT/FI2002/000818 2001-10-23 2002-10-22 Systeme de capteur ou de transducteur a distance et dispositif de communication mobile WO2003036552A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20012051A FI20012051A7 (fi) 2001-10-23 2001-10-23 Etätunnistin- tai anturijärjestelmä, sekä matkaviestin
FI20012051 2001-10-23

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WO2003036552A1 true WO2003036552A1 (fr) 2003-05-01

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2413734A (en) * 2004-04-30 2005-11-02 Motorola Inc Method of location for mobile communications
WO2006000620A1 (fr) * 2004-06-29 2006-01-05 Top Tunniste Oy Procede et dispositif pour utiliser un identificateur rfid pour identifier une marchandise en rouleau
GB2417649A (en) * 2005-07-22 2006-03-01 Laurence Carolan Remote control of devices by mobile telephone
WO2006056388A1 (fr) * 2004-11-22 2006-06-01 Giesecke & Devrient Gmbh Téléphone mobile
GB2425884A (en) * 2005-05-04 2006-11-08 Lontra Environmental Technolog Photovoltaic module
FR2897179A1 (fr) * 2006-02-07 2007-08-10 Schneider Electric Ind Sas Station de lecture/ecriture d'etiquettes electroniques
CN100448242C (zh) * 2004-04-22 2008-12-31 乐金电子(中国)研究开发中心有限公司 一种基于环境识别的移动电话模式自动设置方法
US7671721B2 (en) 2003-05-12 2010-03-02 Valtion Teknillinen Tutkimuskesus Remote sensor, device and method for activating selected remote sensor components
CN103235998A (zh) * 2013-04-17 2013-08-07 江苏太运集团有限公司 智能物流物联网传感系统
CN105160853A (zh) * 2015-09-06 2015-12-16 国网山东利津县供电公司 一种电力计量远程抄表故障巡查系统及方法
WO2019167206A1 (fr) * 2018-02-28 2019-09-06 三菱重工機械システム株式会社 Système et procédé de gestion de rouleau de papier vergé

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WO1993016531A1 (fr) * 1992-02-14 1993-08-19 Saab-Scania Combitech Aktiebolag Systeme de transmission de donnees a hyperfrequences et dispositif de communication destine a etre utilise avec un tel systeme
JPH08191257A (ja) * 1995-01-11 1996-07-23 Nippon Telegr & Teleph Corp <Ntt> ネットワーク設備保守管理システム
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EP0871276A2 (fr) * 1997-04-07 1998-10-14 Franken Plastik GmbH Réseau de distribution avec dispositif de gestion
WO2001006401A1 (fr) * 1999-07-15 2001-01-25 Pinpoint Corporation Procede et appareil de lecture d'etiquette d'identification mobile
WO2001039103A1 (fr) * 1999-11-29 2001-05-31 Tagmaster Ab Unite portable de communications
JP2001338385A (ja) * 2000-05-29 2001-12-07 Lintec Corp 位置処理システム

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WO1993016531A1 (fr) * 1992-02-14 1993-08-19 Saab-Scania Combitech Aktiebolag Systeme de transmission de donnees a hyperfrequences et dispositif de communication destine a etre utilise avec un tel systeme
JPH08191257A (ja) * 1995-01-11 1996-07-23 Nippon Telegr & Teleph Corp <Ntt> ネットワーク設備保守管理システム
US5745049A (en) * 1995-07-20 1998-04-28 Yokogawa Electric Corporation Wireless equipment diagnosis system
EP0871276A2 (fr) * 1997-04-07 1998-10-14 Franken Plastik GmbH Réseau de distribution avec dispositif de gestion
WO2001006401A1 (fr) * 1999-07-15 2001-01-25 Pinpoint Corporation Procede et appareil de lecture d'etiquette d'identification mobile
WO2001039103A1 (fr) * 1999-11-29 2001-05-31 Tagmaster Ab Unite portable de communications
JP2001338385A (ja) * 2000-05-29 2001-12-07 Lintec Corp 位置処理システム

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PATENT ABSTRACTS OF JAPAN vol. 200, no. 204 4 August 2002 (2002-08-04) *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7671721B2 (en) 2003-05-12 2010-03-02 Valtion Teknillinen Tutkimuskesus Remote sensor, device and method for activating selected remote sensor components
CN100448242C (zh) * 2004-04-22 2008-12-31 乐金电子(中国)研究开发中心有限公司 一种基于环境识别的移动电话模式自动设置方法
GB2413734B (en) * 2004-04-30 2006-11-15 Motorola Inc Apparatus and method of localisation for mobile communications
GB2413734A (en) * 2004-04-30 2005-11-02 Motorola Inc Method of location for mobile communications
WO2006000620A1 (fr) * 2004-06-29 2006-01-05 Top Tunniste Oy Procede et dispositif pour utiliser un identificateur rfid pour identifier une marchandise en rouleau
WO2006056388A1 (fr) * 2004-11-22 2006-06-01 Giesecke & Devrient Gmbh Téléphone mobile
GB2425884A (en) * 2005-05-04 2006-11-08 Lontra Environmental Technolog Photovoltaic module
GB2417649A (en) * 2005-07-22 2006-03-01 Laurence Carolan Remote control of devices by mobile telephone
FR2897179A1 (fr) * 2006-02-07 2007-08-10 Schneider Electric Ind Sas Station de lecture/ecriture d'etiquettes electroniques
US8269611B2 (en) 2006-02-07 2012-09-18 Schneider Electric Industries Sas Electronic tag reading/writing station
CN103235998A (zh) * 2013-04-17 2013-08-07 江苏太运集团有限公司 智能物流物联网传感系统
CN105160853A (zh) * 2015-09-06 2015-12-16 国网山东利津县供电公司 一种电力计量远程抄表故障巡查系统及方法
WO2019167206A1 (fr) * 2018-02-28 2019-09-06 三菱重工機械システム株式会社 Système et procédé de gestion de rouleau de papier vergé
JPWO2019167206A1 (ja) * 2018-02-28 2021-02-04 三菱重工機械システム株式会社 原紙ロール管理システム及び原紙ロール管理方法
EP3748398A4 (fr) * 2018-02-28 2021-05-19 Mitsubishi Heavy Industries Machinery Systems, Ltd. Système et procédé de gestion de rouleau de papier vergé

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Publication number Publication date
FI20012051L (fi) 2003-04-24
FI20012051A7 (fi) 2003-04-24
FI20012051A0 (fi) 2001-10-23

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