WO2023002882A1 - Dispositif de lecture d'informations - Google Patents

Dispositif de lecture d'informations Download PDF

Info

Publication number
WO2023002882A1
WO2023002882A1 PCT/JP2022/027399 JP2022027399W WO2023002882A1 WO 2023002882 A1 WO2023002882 A1 WO 2023002882A1 JP 2022027399 W JP2022027399 W JP 2022027399W WO 2023002882 A1 WO2023002882 A1 WO 2023002882A1
Authority
WO
WIPO (PCT)
Prior art keywords
reading
accommodation space
tag
open
information
Prior art date
Application number
PCT/JP2022/027399
Other languages
English (en)
Japanese (ja)
Inventor
有佑 増田
康平 榎本
Original Assignee
株式会社デンソーウェーブ
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 株式会社デンソーウェーブ filed Critical 株式会社デンソーウェーブ
Publication of WO2023002882A1 publication Critical patent/WO2023002882A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation

Definitions

  • the present disclosure relates to an information reader that reads information from wireless tags attached to articles housed in a housing space.
  • a wireless tag that records information about the article is attached to the article, and the wireless tag of the article is transmitted through an antenna arranged in the storage box.
  • Many technologies are used to read information from As a technique for reading information from a wireless tag of an article stored in this way, for example, a reading device disclosed in Patent Document 1 below is known.
  • This reading device includes a housing whose inner surface is formed of a radio wave reflecting material and an antenna housed inside the housing.
  • the distance between the surface and the bottom surface of the housing is adjusted as described above to suppress the effect of the null. , it is necessary to adjust the above distance each time an article is put in or taken out. For this reason, in the configuration in which a movable part or the like is provided for adjusting the distance as described above, not only does the power consumption required for adjusting the distance increase, but there is also a risk that the manufacturing cost will increase in order to ensure durability. be.
  • the present disclosure has been made to solve the above-described problems, and its purpose is to provide a configuration that can improve reading performance without providing a movable part or the like.
  • an information reading device reads information from wireless tags attached to articles housed in a housing space.
  • An information reading device includes a housing, a plurality of antennas, and a control section.
  • the housing has a housing body formed with an opening through which the article is put in and taken out, and a lid body that closes the opening to form the accommodation space. is configured to suppress The plurality of antennas are arranged in the accommodation space.
  • the control unit uses the plurality of antennas to perform reading processing for reading information from the wireless tag housed in the housing space.
  • the control unit includes an output frequency changing unit that changes the output frequency of the radio waves that are respectively output from the plurality of antennas, and a phase difference that changes the phase difference by changing the phase of the radio waves that are respectively output from the plurality of antennas. and a changing unit.
  • an article attached with a wireless tag is housed in the housing space formed by the housing so as to suppress radio wave leakage, and is housed in the housing space using a plurality of antennas arranged in the housing space.
  • the control unit performs reading processing for reading information from the wireless tag.
  • This control unit includes an output frequency changing unit that changes the output frequency of radio waves output from each of the plurality of antennas, and a phase difference changer that changes the phase difference by changing the phase of each of the radio waves that are output from the plurality of antennas. A part is provided.
  • the reading result obtained by the reading process can be changed each time the output frequency is changed or the phase difference is changed.
  • the output frequency changing unit changes the timing of changing the output frequency according to the number of wireless tags accommodated in the accommodation space.
  • the phase difference changer changes the timing of changing the phase difference according to the number of wireless tags accommodated in the accommodation space.
  • phase difference is changed at regular intervals, if there are a large number of wireless tags, the wireless tags are likely to be missed during the specified interval. If the number of pages is small, the reading time becomes long due to the wasteful time after the reading is completed. Therefore, by changing the timing of changing the phase difference according to the number of wireless tags accommodated in the accommodation space, it is possible to shorten the reading time while suppressing omissions in reading.
  • At least one wireless tag accommodated in the accommodation space is used as an open/close determination tag, and based on information obtained by intermittently performing reading processing on the open/close determination tag, the opening is determined.
  • the determination unit determines whether or not the lid is opened and closed so that the lid is closed again after the portion is opened. Then, the reading process is intermittently performed on the open/close determination tag until the determining unit makes an affirmative determination. A reading process is performed on the tag by the control unit.
  • the reading process for reading the wireless tags in the storage space should be performed not periodically, but at the timing when the stored wireless tags are replaced, that is, at the timing when the lid is opened and closed.
  • the open state where the opening is open radio waves leak outside the accommodation space compared to the closed state where the opening is closed.
  • the information obtained will change. For this reason, based on the information (received signal strength, etc.) obtained by reading processing performed intermittently on the open/close judgment tag, the lid is opened and closed so that the opening is closed again after being opened.
  • the opening is opened in consideration of information obtained by intermittent reading processing of the second open/close determination tag provided outside the accommodation space.
  • the determination unit determines whether or not the lid body is opened and closed so as to be closed again later. In this way, by considering the received signal strength of both the open/close determination tag inside the storage space and the second open/close determination tag outside the storage space, it is possible to improve the determination accuracy of the open/close determination of the lid. .
  • FIG. 11 is an explanatory diagram for explaining an overview of an information reading device that further utilizes a second opening/closing determination tag outside the housing space to determine the open/closed state of the housing in the second embodiment;
  • the information reading device 10 is a storage device that reads information about an article G stored in a storage space S provided in a housing 20 from a wireless tag (for example, an RFID tag) T attached to the article.
  • a wireless tag for example, an RFID tag
  • As the article G for example, a key that requires individual management is assumed, and the wireless tag T attached to each article G records readable information about the article. Therefore, by collectively reading the wireless tags T in the accommodation space S, information on the articles G accommodated in the accommodation space S can be obtained.
  • FIG. 1 and the like one of the plurality of articles G accommodated in the accommodation space S is illustrated together with the wireless tag T for convenience.
  • the housing 20 includes a housing body 21 formed with an opening 21a through which an article G is put in and taken out, and a lid body 22 forming an accommodation space S by closing the opening 21a.
  • the housing body 21 and the lid 22 are made of a material (for example, aluminum) that blocks radio waves or attenuates the radio wave intensity, thereby suppressing radio wave leakage from the accommodation space S. ing.
  • the housing body 21 is provided with two antennas 31 and 32 for reading the wireless tag T in the accommodation space S at a position inside the accommodation space S.
  • the antennas 31 and 32 are arranged so that the transmission directions of the transmission waves are substantially orthogonal to each other.
  • the housing body 21 is provided with a housing case or the like made of a material that does not attenuate the radio wave intensity, except for the opening 21a. It can be provided so as to cover the inner surface of the main body 21 .
  • the information reading device 10 also includes a control unit 40 for overall control, and a first communication unit 41 and a second communication unit 42 .
  • the first communication unit 41 is configured to perform wireless communication processing for reading the wireless tag T in the accommodation space S using the antenna 31 under the control of the control unit 40 .
  • the second communication unit 42 is configured to perform wireless communication processing for reading the wireless tag T in the accommodation space S using the antenna 32 under the control of the control unit 40 .
  • control unit 40 and the method of implementing the control process of the present disclosure may be implemented by a special-purpose computer, which is a processor programmed to perform at least one specific function that constitutes a computer program.
  • control unit 40 and the techniques for implementing control processing of the present disclosure may be implemented by special purpose hardware logic circuitry.
  • controller 40 and the techniques for implementing the control processes of the present disclosure may be implemented by a special purpose computer that is a combination of a processor executing a computer program and hardware logic circuitry.
  • the control unit 40 includes a reading unit that reads information from the wireless tag T housed in the housing space S using the antennas 31 and 32 . More specifically, when performing the reading process of reading the RFID tag T in the housing space S, the control unit 40 reads the reading result using the first communication unit 41 and the antenna 31 and the second communication unit 42 and the reading result read using the antenna 32 may be used, or the result of comparing both reading results may be used in order to improve the reading accuracy.
  • the control unit 40 includes an output frequency changing unit that changes the output frequency of radio waves output from the antennas 31 and 32, respectively.
  • the first communication unit 41 is controlled by the output frequency changing unit of the control unit 40 so as to change the output frequency of radio waves output from the antenna 31 .
  • the second communication unit 42 is controlled by the output frequency changing unit of the control unit 40 so as to change the output frequency of radio waves output from the antenna 32 .
  • the control unit 40 includes a phase difference changing unit that changes the phase of radio waves output from the antennas 31 and 32, respectively.
  • the first communication unit 41 is controlled by the phase difference changing unit of the control unit 40 so as to change the phase of the radio wave output from the antenna 31 .
  • the second communication unit 42 is controlled by the phase difference changing unit of the control unit 40 so as to change the phase of the radio wave output from the antenna 32 . Therefore, the phase difference between the phase of the radio wave output from the antenna 31 and the phase of the radio wave output from the antenna 32 can be changed by the control by the control unit 40 .
  • control unit 40 includes an output frequency changing unit that changes the output frequencies of the radio waves output from the antennas 31 and 32, and a phase difference that changes the phase of the radio waves output from the antennas 31 and 32. and a phase difference changing unit.
  • the first reading mode for changing the output frequency of the radio wave is selected.
  • a second read mode is employed that alters the phase difference.
  • the result of collating the information obtained from each wireless tag T via the antenna 31 when the output frequency of the radio wave output from the antenna 31 is sequentially changed and the information output from the antenna 32 are compared.
  • the read result is obtained by further collating the information obtained from each wireless tag T through the antenna 32 when the output frequency of the radio wave is sequentially changed.
  • both antennas 31 , 32 from each RFID tag T and the previously obtained result of comparison are further compared to obtain a reading result.
  • the article G (wireless tag T) stored in the storage space S can be specified.
  • the reading result in the first reading mode and the reading result in the second reading mode are further compared to obtain the articles G (wireless) stored in the storage space S.
  • a tag T) can also be specified.
  • the output frequency is not limited to being changed at regular intervals, but for example, the timing of changing the output frequency according to the number of RFID tags T accommodated in the accommodation space S may be changed. That is, the interval of one reading process, which corresponds to a fixed interval, may be changed according to the number of RFID tags T accommodated in the accommodation space S.
  • the output frequency changing unit of the control unit 40 adjusts the frequency according to the number of RFID tags T accommodated in the accommodation space S, for example, by increasing the interval at which the output frequency is changed as the number of RFID tags T increases. , the timing of changing the output frequency may be changed. As a result, it is possible to shorten the reading time while suppressing reading omissions and the like.
  • phase difference is not limited to being changed at regular intervals. You may change the timing.
  • phase difference is changed at regular intervals, reading failure of the RFID tags T during the regular interval is more likely to occur if the number of RFID tags T is large. If the number of is small, the reading time becomes long due to the wasteful time after the reading is completed. Therefore, by changing the timing of changing the phase difference according to the number of RFID tags T accommodated in the accommodation space S, it is possible to shorten the reading time while suppressing omissions in reading.
  • the antennas for reading the wireless tag T in the accommodation space S are not limited to the antennas 31 and 32 whose transmission directions of the transmission waves are substantially orthogonal to each other. Two antennas whose directions face each other or two antennas whose transmission directions of transmission waves are parallel to each other may be adopted, or three or more antennas may be adopted.
  • the reading process for reading the plurality of RFID tags T in the accommodation space S is performed at the timing when the RFID tags T to be accommodated are replaced, that is, at the timing when the lid 22 of the housing 20 is opened and closed. preferably.
  • an open/close sensor or the like that can detect the open/close state of the housing 20.
  • the number of parts increases, which not only increases the manufacturing cost, but also depends on restrictions such as the installation position of the open/close sensor. There is a possibility that the device itself will become large.
  • a wireless tag (hereinafter referred to as an open/close determination tag Tj) separately provided for open/close determination is arranged in the accommodation space S.
  • the lid is closed again after the opening 21a is opened, based on the received signal strength (RSSI) from the open/close determination tag Tj. 22 is in an open/closed state (hereinafter also referred to as an open/closed state of the housing 20). That is, the control unit 40 of the present embodiment uses at least one wireless tag accommodated in the accommodation space S as the open/close determination tag Tj, and reads the open/close determination tag Tj intermittently.
  • a judgment unit is provided for judging whether or not the lid body 22 is opened and closed so that the opening 21a is closed again after being opened, based on the information.
  • a control unit that determines whether or not the housing 20 is in the open/closed state based on the received signal strength (read result) when the open/close determination tag Tj is intermittently read.
  • the function of 40 may correspond to an example of a "determination unit".
  • a tag reading mode continuous operation mode for reading a plurality of RFID tags T in the accommodation space S and a low consumption mode (intermittent operation mode) for intermittently reading only the opening/closing judgment tag Tj are provided.
  • a tag reading mode continuous operation mode for reading a plurality of RFID tags T in the accommodation space S
  • a low consumption mode intermittently reading only the opening/closing judgment tag Tj are provided.
  • the reading process performed by the reading unit of the control unit 40 so as to switch between the low consumption mode and the tag reading mode will be described in detail below with reference to the timing chart shown in FIG. Note that in FIG. 3, the relationship between switching between the tag reading mode and the low consumption mode, the open/closed state (closed state or open state) of the housing 20, and the received signal strength of the response wave from the open/close determination tag Tj is shown as timing. It is shown in the chart.
  • the mode is switched to the low consumption mode, and the open/close determination tag Tj is read intermittently. Since the process of intermittently reading only the open/close determination tag Tj as a read object is performed, power saving can be achieved as compared with the process of continuously reading a plurality of wireless tags T.
  • FIG. 3 In the reading process in the low consumption mode, as shown in FIG. 3, if the blocked state is maintained, the received signal intensity of the tag Tj for open/close determination becomes a constant value.
  • the housing 20 is in the open/closed state based on the received signal strength of the tag Tj for open/close determination, and when the received signal strength of the tag Tj for open/close determination has hardly changed from the constant value. , it is determined that the housing 20 is not in the open/closed state, and the low consumption mode is maintained.
  • the mode is switched to the low consumption mode again, and the opening/closing determination tag Tj is read. Until the strength of the received signal changes as described above, only the open/close determination tag Tj is intermittently read.
  • the determination unit of the control unit 40 is obtained by intermittently performing the reading process on the opening/closing determination tag Tj housed in the housing space S. Based on the received signal intensity, it is determined whether or not the housing 20 is in an open/closed state in which the lid 22 is opened and closed so that the opening 21a is closed again after being opened. Then, the reading unit of the control unit 40 intermittently performs reading processing on the open/close determination tag Tj until an affirmative determination is made, and the tag Tj is accommodated in the accommodation space S for a predetermined period after the affirmative determination is made. All the wireless tags T are read.
  • the cover 22 is opened and closed so that the opening 21a is opened and then closed again, based on the received signal intensity and the like obtained by the reading process performed intermittently on the open/close determination tag Tj. It is possible to determine whether or not the housing 20 is in the opened/closed state. As a result, it is possible to determine whether or not the lid body 22 of the housing 20 is in the opened/closed state without using an open/close sensor or the like, and the lid body 22 is accommodated in the accommodation space S for a predetermined period after an affirmative determination is made. By performing the reading process for all the wireless tags T, it is possible to improve the reading performance and reduce the power consumption for the reading process.
  • the open/close determination tag Tj may be attached to the inside of the lid 22, for example, so that the change in received signal strength obtained when the lid 22 is opened or closed may be increased. Further, the open/close determination tag Tj is not limited to being provided separately from the RFID tag T attached to the article G to be managed, but is housed in the housing space S as a management object for each open/closed state of the housing 20. The wireless tag T attached to any one of the articles G may be used.
  • information such as received signal strength obtained by intermittent reading processing of the second open/close determination tag Tj2 provided outside the accommodation space S is also taken into consideration. It may be determined whether or not the housing 20 is in the open/closed state. In this way, by considering the received signal intensity of both the open/close determination tag Tj inside the accommodation space S and the second open/close determination tag Tj2 outside the accommodation space S, the lid 22 of the housing 20 can be opened/closed. It is possible to improve the determination accuracy of the determination.
  • the antennas for reading the plurality of wireless tags T and the open/close determination tag Tj in the accommodation space S are not limited to the two antennas 31 and 32.
  • one An antenna may be employed, and in this case, the output frequency and phase of the radio wave output from the antenna may not be changeable.
  • the information reading device 10 reads information from the wireless tag T attached to the article G accommodated in the accommodation space S.
  • the information reader 10 includes a housing 20 , an antenna, and a control section 40 .
  • the housing 20 has a housing body 21 formed with an opening 21a through which the article is taken in and out, and a lid body 22 that closes the opening to form the storage space. radio wave leakage is suppressed.
  • An antenna is arranged in the accommodation space.
  • the control unit 40 performs reading processing for reading information from the wireless tag housed in the housing space by controlling the antenna.
  • the control unit uses at least one wireless tag accommodated in the accommodation space as an open/close determination tag Tj, and based on the reading result when the open/close determination tag is intermittently subjected to the read processing, A determination unit is provided for determining whether or not the lid is opened and closed so that the opening is closed again after being opened.
  • the control unit intermittently performs the reading process on the opening/closing determination tag until the determination unit makes an affirmative determination, and for a predetermined period after the determination unit makes the affirmative determination, the storage space is read.
  • the reading process is performed on all the wireless tags accommodated in the .
  • Goods G to be managed in the present disclosure are not limited to keys that require individual management. It may be a temporarily stored product.
  • the housing 20 is not limited to being formed in a box shape so as to block radio waves or attenuate radio wave intensity by having a housing body 21 and a lid body 22. may be configured to be openable and closable to form a housing space that blocks radio waves or attenuates radio wave intensity.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

L'invention concerne un dispositif de lecture d'informations : un espace de réception (S) étant formé par une enceinte (20) de manière à empêcher une fuite d'ondes radioélectriques, et l'espace de réception recevant un article (G) portant une étiquette sans fil (T) ; et une unité de commande (40) exécutant un traitement de lecture lors duquel des antennes (31, 32) agencées dans l'espace de réception sont utilisées pour lire des informations à partir de l'étiquette sans fil reçue dans l'espace de réception. L'unité de commande comprend : une unité de modification de fréquence de sortie destinée à modifier une fréquence de sortie d'ondes radioélectriques émises à partir de chacune des antennes ; et une unité de modification de différence de phase destinée à modifier une différence de phase par modification des phases des ondes radioélectriques émises à partir de chacune des antennes. Grâce à cette configuration, il est possible d'améliorer les performances de lecture sans fournir de parties mobiles ou analogues.
PCT/JP2022/027399 2021-07-20 2022-07-12 Dispositif de lecture d'informations WO2023002882A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021119724A JP2023015763A (ja) 2021-07-20 2021-07-20 情報読取装置
JP2021-119724 2021-07-20

Publications (1)

Publication Number Publication Date
WO2023002882A1 true WO2023002882A1 (fr) 2023-01-26

Family

ID=84979154

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/027399 WO2023002882A1 (fr) 2021-07-20 2022-07-12 Dispositif de lecture d'informations

Country Status (2)

Country Link
JP (1) JP2023015763A (fr)
WO (1) WO2023002882A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007096821A (ja) * 2005-09-29 2007-04-12 Brother Ind Ltd 引き出し型収容器
WO2009075226A1 (fr) * 2007-12-10 2009-06-18 Omron Corporation Etiquette rfid, et système et procédé permettant la détection de changement d'environnement d'étiquette rfid
JP2010170478A (ja) * 2009-01-26 2010-08-05 Fujitsu Ltd アンテナ動作プログラム、アンテナ制御装置及び無線タグ読取ゲート
JP2011249890A (ja) * 2010-05-24 2011-12-08 Hitachi Ltd 無線通信システムおよび無線通信方法
JP2016149119A (ja) * 2014-11-26 2016-08-18 トムソン ライセンシングＴｈｏｍｓｏｎ Ｌｉｃｅｎｓｉｎｇ アクティビティを監視する装置および方法
WO2018116700A1 (fr) * 2016-12-22 2018-06-28 株式会社村田製作所 Système de gestion d'articles
JP2019061305A (ja) * 2017-09-22 2019-04-18 大日本印刷株式会社 防犯警報装置
JP2020077408A (ja) * 2018-11-08 2020-05-21 株式会社デンソーウェーブ 無線タグシステム
JP2020087373A (ja) * 2018-11-30 2020-06-04 パナソニックＩｐマネジメント株式会社 販売システム及び販売方法
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

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007096821A (ja) * 2005-09-29 2007-04-12 Brother Ind Ltd 引き出し型収容器
WO2009075226A1 (fr) * 2007-12-10 2009-06-18 Omron Corporation Etiquette rfid, et système et procédé permettant la détection de changement d'environnement d'étiquette rfid
JP2010170478A (ja) * 2009-01-26 2010-08-05 Fujitsu Ltd アンテナ動作プログラム、アンテナ制御装置及び無線タグ読取ゲート
JP2011249890A (ja) * 2010-05-24 2011-12-08 Hitachi Ltd 無線通信システムおよび無線通信方法
JP2016149119A (ja) * 2014-11-26 2016-08-18 トムソン ライセンシングＴｈｏｍｓｏｎ Ｌｉｃｅｎｓｉｎｇ アクティビティを監視する装置および方法
WO2018116700A1 (fr) * 2016-12-22 2018-06-28 株式会社村田製作所 Système de gestion d'articles
JP2019061305A (ja) * 2017-09-22 2019-04-18 大日本印刷株式会社 防犯警報装置
JP2020077408A (ja) * 2018-11-08 2020-05-21 株式会社デンソーウェーブ 無線タグシステム
JP2020087373A (ja) * 2018-11-30 2020-06-04 パナソニックＩｐマネジメント株式会社 販売システム及び販売方法
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

Also Published As

Publication number Publication date
JP2023015763A (ja) 2023-02-01

Similar Documents

Publication Publication Date Title
KR100737047B1 (ko) 태그 통신 관리 시스템
KR100704101B1 (ko) 태그 통신용 안테나, 태그 통신 장치, 태그 통신 시스템,태그 통신 장치의 스캔 조정 방법, 및 스캔 조정프로그램을 기록한 기록 매체
EP3912008B1 (fr) Dispositif de détection magnétique pour couvercle
WO2023002882A1 (fr) Dispositif de lecture d'informations
JP2007122600A (ja) 集積回路チップ及びｒｆｉｄシステム
JP2008219503A (ja) タグ通信装置及びタグ通信システム
US20180269572A1 (en) Movable antenna and inspection apparatus
JP2007137553A (ja) 物品保管装置
JP2018018195A (ja) 物品読取装置
JP5182548B2 (ja) タグ通信装置
EP2154634B1 (fr) Circuit d'optimisation de mise sous tension d'un transpondeur RFID
US20120044058A1 (en) Rfid tag and communication method
US20060125602A1 (en) Active multiplexer for a multiple antenna transceiver
EP3432192A1 (fr) Appareil de lecture d'étiquettes sans fil
US10401478B2 (en) Detecting presence, size, and direction of motion of an object using radio-frequency techniques
WO2009107565A1 (fr) Système de communication rfid
US20080094179A1 (en) Identification device for objects with a transponder and a corresponding method
KR101105587B1 (ko) 무선 통신 시스템 및 방법, 무선 통신 장치 및 방법
JP6805931B2 (ja) タグリーダ
US20220324656A1 (en) Article Transport Facility
EP3610354A1 (fr) Système informatique sensible à la situation énergétique
JP2007158546A (ja) パワーコントロール機能付きｒｆｉｄシステム
JP4992125B2 (ja) 携帯端末装置及び該携帯端末装置に用いられるアンテナ共振周波数調整方法
JP5080937B2 (ja) リーダライタ及びゲートシステム
JP4816320B2 (ja) 無線通信装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22845816

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE