WO2015113446A1 - Appareil et procédé d'élimination d'une zone de silence dans un réseau d'antennes rf - Google Patents

Appareil et procédé d'élimination d'une zone de silence dans un réseau d'antennes rf Download PDF

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Publication number
WO2015113446A1
WO2015113446A1 PCT/CN2014/093763 CN2014093763W WO2015113446A1 WO 2015113446 A1 WO2015113446 A1 WO 2015113446A1 CN 2014093763 W CN2014093763 W CN 2014093763W WO 2015113446 A1 WO2015113446 A1 WO 2015113446A1
Authority
WO
WIPO (PCT)
Prior art keywords
array
antenna
blind spot
rfid tag
antennas
Prior art date
Application number
PCT/CN2014/093763
Other languages
English (en)
Inventor
Zheng Shi
Ruipeng LI
Original Assignee
Zheng Shi
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
Priority claimed from PCT/CN2014/071850 external-priority patent/WO2014139349A1/fr
Application filed by Zheng Shi filed Critical Zheng Shi
Priority to CN201480004981.5A priority Critical patent/CN105103088A/zh
Priority to PCT/CN2015/072626 priority patent/WO2015131746A2/fr
Priority to US14/792,635 priority patent/US9399174B2/en
Publication of WO2015113446A1 publication Critical patent/WO2015113446A1/fr
Priority to US15/241,085 priority patent/US10105589B2/en

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F3/00—Board games; Raffle games
    • A63F3/00643—Electric board games; Electric features of board games
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03543—Mice or pucks
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F3/00—Board games; Raffle games
    • A63F3/00643—Electric board games; Electric features of board games
    • A63F2003/00662—Electric board games; Electric features of board games with an electric sensor for playing pieces
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F3/00—Board games; Raffle games
    • A63F3/00643—Electric board games; Electric features of board games
    • A63F2003/00662—Electric board games; Electric features of board games with an electric sensor for playing pieces
    • A63F2003/00665—Electric board games; Electric features of board games with an electric sensor for playing pieces using inductance
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F3/00—Board games; Raffle games
    • A63F3/00643—Electric board games; Electric features of board games
    • A63F2003/00678—Electric board games; Electric features of board games with circuits closed by mechanical means
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F9/00—Games not otherwise provided for
    • A63F9/24—Electric games; Games using electronic circuits not otherwise provided for
    • A63F2009/2483—Other characteristics
    • A63F2009/2485—Other characteristics using a general-purpose personal computer
    • A63F2009/2486—Other characteristics using a general-purpose personal computer the computer being an accessory to a board game
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/0304—Detection arrangements using opto-electronic means
    • G06F3/0317—Detection arrangements using opto-electronic means in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface
    • G06F3/0321—Detection arrangements using opto-electronic means in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface by optically sensing the absolute position with respect to a regularly patterned surface forming a passive digitiser, e.g. pen optically detecting position indicative tags printed on a paper sheet

Definitions

  • the present invention relates to an RF antenna array for detecting an RFID tag. More specifically, the present invention relates to eliminating blind spot of a high frequency RF antenna array, allowing an RFID tag to be detected when placed anywhere on top of the RF antenna array that is within the communication range of the RF antenna array.
  • Radio frequency identification (RFID) technology has been used in a variety of applications such as tracking, security, transportation, retailing, industrial, and individual identification.
  • RFID technology has been used for detecting the presence of an object, identifying the object, or obtaining data associated with the object.
  • RFID tag is attached to an object and communicates wirelessly with an RFID reader.
  • the RFID reader typically drives a plurality of RF antennas to detect and identify RFID tags at different locations.
  • the antenna of the RFID reader emits RF signals to activate passive RFID tags within a reading range. Once activated by the RF energy, the passive RFID tags are configured to transmit a responding signal to the RFID reader.
  • the RFID tag obtains its energy through electromagnetic induction with the EM field generated by the RF antenna, and the communication range of the RFID tag is dependent on the intensity of the EM field. For an RF antenna in the shape of a square, since the electromagnetic wave radiates less effectively around its four corners, the intensity of the EM field is weak around the corners, and thus the RFID tag will be difficult to be detected and identified if it is placed in close proximity to any corners of the RF antenna.
  • a “blind spot” is formed as a result at the area encompassing borders of multiple RF antennas in the array.
  • the blind spot refers to an area on the surface of the RF antenna array, where an RFID tag fails to be detected.
  • an RFID tag placed elsewhere outside the blind spot within the effective communication range of the RF antenna array is detectable to the antenna array.
  • the present invention provides to an apparatus and method for eliminating the blind spot in high frequency (13.56 MHz) RF antenna arrays.
  • the present invention provides an apparatus and method for eliminating the blind spot of a high frequency (13.56 MHz) RF antenna array, allowing an RFID tag to be detected when placed anywhere on top of the RF antenna array and within the general reading range of the antenna array.
  • the high-frequency RF antenna array includes a first array of RF antenna placed on a first surface, an RFID reader that is connected to the first RF antenna array, and a second RF antenna placed on a second surface. Without the second RF antenna, a blind spot would have formed at an area encompassing borders of multiple RF antennas of the first array.
  • the second RF antenna is located directly below or above the blind spot of the first array, but not connected to any electrical path.
  • the high-frequency RF antenna array further includes a processor operatively linked to the RFID reader.
  • the processor is configured to determine that the RFID tag has been placed on top of the second RF antenna even though the second RF antenna is not electrically connected to the RFID reader. This is in contrast to the situation whereby if the second RF antenna is removed, the RFID tag placed at the same place will fail to be detected. Therefore, this high-frequency RF antenna array design is capable of reading a passive RFID tag throughout the surface area of the array within the communication range of the antennas without a blind spot.
  • the present invention is useful in improving the RF communication range and accuracy of a passive RFID system.
  • FIG. 1 is an exemplary schematic diagram illustrating the formation of the blind spot in an array of RF antennas in accordance with one embodiment of the present invention.
  • FIG. 2A is an exemplary schematic diagram of a birds-eye view of the high-frequency RF antenna array for reading a passive RFID tag in accordance with one embodiment of the present invention.
  • FIG. 2B is an exemplary schematic diagram of a cross-sectional view of the high-frequency RF antenna array with each layer separated for the purpose of illustration in accordance with one embodiment of the present invention.
  • FIG. 1 is an exemplary schematic diagram illustrating the formation of the blind spot in an array of RF antennas in accordance with one embodiment of the present invention.
  • an array of RF antennas 101 is embedded on a surface. Referring to the four antennas 102, 103, 104, and 105 located at the top left corner of the array, one can see that these antenna designs are in the square shape and each are connected to an RF reader (not shown in FIG. 1) .
  • One representative size of the antenna is 62mm ⁇ 62mm, and typically the distance between two adjacent RF antennas in the array is 2mm.
  • an RFID tag cannot be detected and identified by any RF antennas in the array if it is placed in close proximity to the corners of the RF antennas where the electromagnetic wave is not radiated effectively.
  • an RFID tag 108 is placed at the area 106 encompassing borders of the four corners of the RF antennas 102, 103, 104, and 105, a blind spot of the antenna array is formed as a result.
  • blind spots can also occur in areas encompassing adjacent borders of multiple RF antennas in arrays of different arrangements from what is being presented in this figure.
  • a two dimensional array of RF antennas with each of the antenna being a hexagon will likely form a blind spot at the area encompassing the adjacent corners of three antennas.
  • the antennas of the first array are deployed in a three dimensional, rather than two dimensional, surface, a blind spot is likely to form in the space that encompasses the corners of multiple antennas.
  • the present invention provides an apparatus and method for eliminating the blind spot in the first RF antenna array as illustrated in FIG. 1.
  • FIG. 2A is an exemplary schematic diagram of a birds-eye view of the high-frequency RF antenna array for reading a passive RFID tag in accordance with one embodiment of the present invention.
  • the high-frequency RF antenna array 201 includes a first array of high-frequency RF antenna placed on a first surface, an RFID reader that is connected to the first RF antenna array, and second RF antennas 206 placed on a second surface.
  • the RF antenna array further includes a processor operatively linked to the RFID reader (not shown in FIG. 3) .
  • the first array consists of at least four RF antennas of squares in shape, e.g., antennas 202, 203, 204, and 205 located at the top left corner of the array. If an RFID tag 210 is placed on the surface area of the antenna array and detected only by antenna 202, the processor is configured to determine that the RFID tag has been placed on top of the antenna 202. As previously described in FIG. 1, however, a blind spot of the antenna array is formed as a result at the area encompassing borders of the four corners of the four RF antennas 202-205. Once an RFID tag 211 is placed on the blind spot, it is not detected by any of the four RF antennas 202-205.
  • the second RF antennas 206 are also squares in shape placed on a second surface, with each of them located directly below or above the area encompassing borders of four adjacent corners of four RF antennas in the first array.
  • One representative size of the second RF antenna is 22mm ⁇ 22mm, a smaller size relative to the first RF antenna array.
  • the second RF antenna is not connected to any network or electrical path in any form. It consists of coils as well as electronic components such as electric capacitors and electric resistors. Therefore, an RFID tag cannot be detected by the second antenna independently because the second antenna is not operatively linked to the RF reader or the processor.
  • a second EM field in an opposite direction to the EM field generated by the first RF antenna array, is generated by a second RF antenna.
  • the second RF antenna can reach the optimal resonance with the first RF antenna array and thus enables the detection and identification of the RFID tags placed on the second RF antenna by the RF antennas in the first array.
  • the processor is configured to determine that the RFID tag has been placed on top of the second RF antenna. Therefore, this high-frequency RF antenna array is capable of reading a passive RFID tag throughout the surface area of the array within the communication range of the antennas without a blind spot.
  • the processor is configured to determine that the RFID tag has been placed on top of the second antenna 206, i.e., the area encompassing borders of the four adjacent corners of the four RF antennas 202-205. And this is in contrast to the situation whereby the RFID tag 211 placed at the same place will fail to be detected, if the second RF antenna 206 is removed, even though the second RF antenna 206 does not have electrical connection to the RFID reader.
  • this high-frequency RF antenna array is capable of reading a passive RFID tag throughout the surface area of the array within the communication range of the antennas without a blind spot.
  • FIG. 2B is an exemplary schematic diagram of a cross-sectional view of the high-frequency RF antenna array with each layer clearly spread for illustration sake in accordance with one embodiment of the present invention.
  • the bottom layer 207 is the substrate or base of the high frequency RG antenna array.
  • the first surface 209 embedded with the first antenna array is placed above the bottom layer 207.
  • the second surface 208 embedded with second RF antennas 206 In between the bottom layer 207 and the first surface 209 is the second surface 208 embedded with second RF antennas 206.
  • the second surface 208 can also be on top of the first surface 209. Therefore, each of the second RF antennas 206 is positioned directly below or above a blind spot of the first array.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • User Interface Of Digital Computer (AREA)
  • Toys (AREA)
  • Near-Field Transmission Systems (AREA)
  • Position Input By Displaying (AREA)

Abstract

La présente invention concerne un appareil et un procédé d'élimination d'une zone de silence d'un réseau d'antennes RF à haute fréquence, permettant de détecter une balise RFID lorsqu'elle est placée n'importe où en haut et à l'intérieur de la plage de communication du réseau d'antennes RF. Le réseau d'antennes RF comporte un premier réseau d'antennes RF placées sur une première surface et une seconde antenne RF placée sur une seconde surface. La seconde antenne RF est située directement au-dessous ou au-dessus de la zone englobant des bordures de multiples antennes dans le premier réseau, mais n'est connectée à aucun trajet électrique. Par l'intermédiaire de l'induction électromagnétique avec le champ EM généré par le premier réseau d'antennes RF, un second champ EM est formé par la seconde antenne RF, ce qui permet une détection et une identification de la balise RFID placée sur la zone de silence du premier réseau d'antennes RF. La présente invention est utile dans l'amélioration de la plage de communication RF et de la précision d'un système RFID passif.
PCT/CN2014/093763 2013-03-12 2014-12-12 Appareil et procédé d'élimination d'une zone de silence dans un réseau d'antennes rf WO2015113446A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201480004981.5A CN105103088A (zh) 2014-01-30 2014-12-12 消除rf天线阵列盲点的装置和方法
PCT/CN2015/072626 WO2015131746A2 (fr) 2014-03-06 2015-02-10 Système et procédé permettant de diriger le déplacement d'un objet sur une surface interactive suivant un chemin défini
US14/792,635 US9399174B2 (en) 2013-03-12 2015-07-07 Apparatus and method for eliminating blind spot in an RF antenna array
US15/241,085 US10105589B2 (en) 2014-03-06 2016-08-19 System and method for directing an object to move on an interactive surface through a defined path

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CNPCT/CN2014/071850 2014-01-30
PCT/CN2014/071850 WO2014139349A1 (fr) 2013-03-12 2014-01-30 Système et procédé d'identification et de localisation d'un objet relativement à une surface interactive
PCT/CN2014/072961 WO2014139369A1 (fr) 2013-03-12 2014-03-06 Système et procédé d'identification et de localisation d'objet relativement à une surface interactive
CNPCT/CN2014/072961 2014-03-06
PCT/CN2014/079892 WO2015113359A1 (fr) 2013-03-12 2014-06-13 Système et procédé d'identification de l'identifiant et de l'emplacement d'un objet par rapport à une surface interactive
CNPCT/CN2014/079892 2014-06-13
CNPCT/CN2014/080495 2014-06-23
PCT/CN2014/080495 WO2015113365A1 (fr) 2014-01-30 2014-06-23 Système et procédé de reconnaissance d'id, d'orientation et de position d'un objet par rapport à une surface interactive

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/080495 Continuation-In-Part WO2015113365A1 (fr) 2013-03-12 2014-06-23 Système et procédé de reconnaissance d'id, d'orientation et de position d'un objet par rapport à une surface interactive

Related Child Applications (3)

Application Number Title Priority Date Filing Date
PCT/CN2014/072961 Continuation-In-Part WO2014139369A1 (fr) 2013-03-12 2014-03-06 Système et procédé d'identification et de localisation d'objet relativement à une surface interactive
PCT/CN2015/072626 Continuation-In-Part WO2015131746A2 (fr) 2014-03-06 2015-02-10 Système et procédé permettant de diriger le déplacement d'un objet sur une surface interactive suivant un chemin défini
US14/792,635 Continuation-In-Part US9399174B2 (en) 2013-03-12 2015-07-07 Apparatus and method for eliminating blind spot in an RF antenna array

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WO2015113446A1 true WO2015113446A1 (fr) 2015-08-06

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Application Number Title Priority Date Filing Date
PCT/CN2014/080495 WO2015113365A1 (fr) 2013-03-12 2014-06-23 Système et procédé de reconnaissance d'id, d'orientation et de position d'un objet par rapport à une surface interactive
PCT/CN2014/090890 WO2015113431A1 (fr) 2013-03-12 2014-11-12 Système et procédé de reconnaissance d'objets à détection de capacité continue
PCT/CN2014/091918 WO2015113440A1 (fr) 2013-03-12 2014-11-21 Système et procédé permettant de changer l'état d'un élément d'interface utilisateur marqué sur des objets physiques
PCT/CN2014/093763 WO2015113446A1 (fr) 2013-03-12 2014-12-12 Appareil et procédé d'élimination d'une zone de silence dans un réseau d'antennes rf

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Application Number Title Priority Date Filing Date
PCT/CN2014/080495 WO2015113365A1 (fr) 2013-03-12 2014-06-23 Système et procédé de reconnaissance d'id, d'orientation et de position d'un objet par rapport à une surface interactive
PCT/CN2014/090890 WO2015113431A1 (fr) 2013-03-12 2014-11-12 Système et procédé de reconnaissance d'objets à détection de capacité continue
PCT/CN2014/091918 WO2015113440A1 (fr) 2013-03-12 2014-11-21 Système et procédé permettant de changer l'état d'un élément d'interface utilisateur marqué sur des objets physiques

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EP (2) EP3100142A1 (fr)
WO (4) WO2015113365A1 (fr)

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CN106816046A (zh) * 2015-11-27 2017-06-09 施政 一种交互板型语言学习装置
CN107305444A (zh) * 2016-04-19 2017-10-31 施政 探测系统和方法
US9589161B1 (en) * 2016-05-13 2017-03-07 Kazoo Technology (Hong Kong) Limited Substrate with electrically conductive patterns that are readable
CN106422297B (zh) * 2016-10-20 2022-09-13 中南大学 围棋自动上子机构

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WO2015113431A1 (fr) 2015-08-06
WO2015113440A1 (fr) 2015-08-06
WO2015113365A1 (fr) 2015-08-06
EP3100148A1 (fr) 2016-12-07
EP3100142A1 (fr) 2016-12-07

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