JP2006029993A - Moisture detecting sensor and moisture detector - Google Patents

Moisture detecting sensor and moisture detector Download PDF

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JP2006029993A
JP2006029993A JP2004209522A JP2004209522A JP2006029993A JP 2006029993 A JP2006029993 A JP 2006029993A JP 2004209522 A JP2004209522 A JP 2004209522A JP 2004209522 A JP2004209522 A JP 2004209522A JP 2006029993 A JP2006029993 A JP 2006029993A
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wireless
tag
moisture
data
moisture detection
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Toshihisa Ikeda
俊久 池田
Teruo Yamamoto
照夫 山本
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a moisture detecting sensor having a simple constitution not adding a special circuit constitution and not taking a liquid in a circuit. <P>SOLUTION: An electromagnetic wave transmitting water absorbable substance having electromagnetic wave transmissivity and water absorbability is applied to or brought into contact with the whole or a part of a radio IC tag 11 subjected to waterproof or drip-proof treatment. By this method, the reading of data becomes possible only when a cover means 12 contains no moisture and the presence of moisture can be detected by an extremely simple constitution only composed of the general radio IC tag and the electromagnetic wave transmitting water absorbable substance. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、無線ＩＣタグを用いた水分検知センサおよび水分検知装置に関するものである。   The present invention relates to a moisture detection sensor and a moisture detection device using a wireless IC tag.

無線ＩＣタグは電池を内蔵しないが、読取手段が発生させる電磁波領域内に入ると電磁波により励起され、無線ＩＣタグに電源が供給され、さらに読取手段が発生する電磁波にはコマンドが含まれているので、そのコマンドを無線ＩＣタグが受け取ると、個別ＩＤを含むデータを読取手段に返答するという動作原理である。簡単な構成ながら電波で情報を発信することが出来るため、工場や流通関連での在庫管理をはじめとしてあらゆる分野で活用されており、既に無線ＩＣタグと液体センサを組み合わせたものも存在し、介護分野ではおむつの状態検出が行われており、特許文献１に示すように小型かつ安価で再利用可能な液体検知センサを提供することを目的として無線タグと水分検知センサから構成されたものがある。
特開２００４−０８５２７７号公報 The wireless IC tag does not contain a battery, but is excited by the electromagnetic wave when entering the electromagnetic wave region generated by the reading means, power is supplied to the wireless IC tag, and the electromagnetic wave generated by the reading means includes a command. Therefore, when the wireless IC tag receives the command, the operation principle is such that data including the individual ID is returned to the reading means. Because it can transmit information by radio waves with a simple configuration, it is used in various fields including factory and distribution related inventory management, and there are already combinations of wireless IC tags and liquid sensors. In the field, diaper state detection is performed, and as shown in Patent Document 1, there is one configured of a wireless tag and a moisture detection sensor for the purpose of providing a small, inexpensive and reusable liquid detection sensor. .
JP 2004-085277 A

しかしながら、この液体検査センサでは一般的に使用されている無線ＩＣタグ以外の特殊な回路構成が加えられており、しかも測定しようとする液体を回路構成内に取り込む構造になっているので、食料品や医薬品などを対象にすることは、化学面、物理面、衛生面、心理面などあらゆる面から問題が多く、こういった物に使用することは必ずしも適していなかった。   However, in this liquid inspection sensor, a special circuit configuration other than the commonly used wireless IC tag is added, and the liquid to be measured is taken into the circuit configuration. Targeting drugs and pharmaceuticals has many problems in all aspects including chemical, physical, hygiene, and psychological aspects, and it was not always suitable for use on such items.

そこで、前記従来の課題を解決するために、本発明の水分検知センサおよび水分検知装置は、防水もしくは防滴処理がされた無線ＩＣタグを用いて、電磁波が透過可能かつ吸水性を有する電磁波透過吸水物質で前記無線ＩＣタグの全部または一部を覆うあるいは接するようにして、超短波あるいはマイクロ波領域の周波数帯を使用している。これは被覆手段が水分を含んでいない時にだけデータ読み出しが可能となり、回路構成内に液体を取り込むこともなく、水分検出のためのセンサを別途追加する必要もなく、一般的な無線ＩＣタグと電磁波透過吸水物質だけの極めて簡単な構成で水分の有無を検出できる。   Therefore, in order to solve the above-described conventional problems, the moisture detection sensor and the moisture detection device of the present invention are capable of transmitting an electromagnetic wave and having a water absorption property using a waterproof or drip-proof wireless IC tag. The whole or a part of the wireless IC tag is covered with or in contact with a water-absorbing substance, and a frequency band in the ultrashort wave or microwave region is used. Data can be read only when the covering means does not contain moisture, no liquid is taken into the circuit configuration, no additional sensor for moisture detection is required, and a general wireless IC tag is used. The presence or absence of moisture can be detected with a very simple configuration of only an electromagnetic wave transmission water absorbing material.

本発明の水分検知センサおよび水分検知装置は、回路構成の内部に液体を取り込むことなく、被覆手段が水分を含んでいない時にだけ電波で情報を発信することが出来るという超短波あるいはマイクロ波領域の周波数帯を使用し、電池を必要としないパッシブ型の無線ＩＣタグ自身の特性を利用しているので、一般的な無線ＩＣタブと電磁波透過吸水物質だけの簡単な構成で水分検出を行い、コスト的に有利な水分検出センサ、もしくは、水分検知装置を提供できる。   The moisture detection sensor and the moisture detection device of the present invention are capable of transmitting information by radio waves only when the coating means does not contain moisture without taking in liquid into the circuit configuration, and frequencies in the ultra-high frequency or microwave range. Because it uses the characteristics of a passive type wireless IC tag itself that uses a band and does not require a battery, it can detect moisture with a simple configuration using only a general wireless IC tab and an electromagnetic wave transmission water-absorbing substance. It is possible to provide a moisture detection sensor or a moisture detection device that is advantageous to the above.

第１の発明は、無線ＩＣタグと、前記無線ＩＣタグの全部または一部を覆うあるいは接するように設けられ、電磁波が透過可能かつ吸水性を有する被覆手段から構成された水分検知センサであり、前記無線ＩＣタグは超短波あるいはマイクロ波領域の周波数帯を使用し電池を必要としないパッシブ型であって前記無線ＩＣタグの持つ水分の影響を受けやすいという特性を持つので、被覆手段が水分を含まない時にだけ、前記無線ＩＣタグからデータ読み出しを出来るので、乾燥状態になったこと、あるいは、乾燥状態ではなくなったことが検知出来る。   The first invention is a moisture detection sensor comprising a wireless IC tag and a covering means that is provided so as to cover or touch all or a part of the wireless IC tag, and is capable of transmitting electromagnetic waves and having water absorption, Since the wireless IC tag is a passive type that uses a frequency band in the ultra-short wave or microwave region and does not require a battery and is easily affected by the moisture of the wireless IC tag, the covering means contains moisture. Since data can be read from the wireless IC tag only when there is no data, it can be detected that the device is in a dry state or no longer in a dry state.

第２の発明は、無線ＩＣタグと、前記無線ＩＣタグの全部または一部を覆うあるいは接するように設けられ、電磁波が透過可能かつ吸水性を有する被覆手段と、前記無線ＩＣタグからデータを読み取るデータ読取手段と、前記データ読取手段よりデータを受信する処理手段とから構成された水分検知装置であり、被測定物に直接接触することなく前記データ読取手段で被覆手段に水が含まれているかどうか検知でき、その情報は前記処理手段を通じて報知できる。   According to a second aspect of the present invention, the wireless IC tag is provided so as to cover or be in contact with all or part of the wireless IC tag, and is capable of transmitting electromagnetic waves and having water absorption properties, and reads data from the wireless IC tag. A moisture detecting apparatus comprising a data reading means and a processing means for receiving data from the data reading means, and whether the covering means includes water without contacting the object to be measured without directly contacting the object to be measured. Can be detected, and the information can be notified through the processing means.

第３の発明は、２つ以上の無線ＩＣタグと、前記２つ以上の無線ＩＣタグの全部または一部を覆うあるいは接するように設けられ、電磁波が透過可能かつ吸水性を有する被覆手段から構成された水分検知センサであり、前記２つ以上の無線ＩＣタグのうちで直近に水分がないものだけからデータ読み出しが出来るので、被覆手段のどの部分に水分が含まれているのか、どの部分が乾燥しているのか、どの程度の割合で水分が含まれているのか、乾燥しているのかどうかを検知できる。   The third invention comprises two or more wireless IC tags and coating means provided so as to cover or be in contact with all or part of the two or more wireless IC tags, and capable of transmitting electromagnetic waves and having water absorption. Since the data can be read only from the two or more wireless IC tags that do not have moisture most recently, which part of the covering means contains moisture and which part Whether it is dry, how much water is contained, and whether it is dry can be detected.

第４の発明は、２つ以上の無線ＩＣタグと、前記２つ以上の無線ＩＣタグの全部または一部を覆うあるいは接するように設けられ、電磁波が透過可能かつ吸水性を有する被覆手段と、前記２つ以上の無線ＩＣタグからデータを読み取るデータ読取手段と、前記データ読取手段よりデータを受信する処理手段とから構成された水分検知装置であり、被測定物に直接接触することなく前記データ読取手段で、前記２つ以上の無線ＩＣタグのうちで直近に水分がないものだけからデータ読み出しが出来るので、被覆手段のどの部分に水分が含まれているのか、どの部分が乾燥しているのか、どの程度の割合で水分が含まれているのか、乾燥しているのかどうかを検知でき、その情報は前記処理手段を通じて報知できる。   4th invention is provided so that two or more radio | wireless IC tags may cover or touch all or a part of said two or more radio | wireless IC tags, electromagnetic wave can permeate | transmit, and it has a water absorption property, A moisture detection apparatus comprising data reading means for reading data from the two or more wireless IC tags and processing means for receiving data from the data reading means, wherein the data is not directly in contact with an object to be measured. Since the reading means can read data only from the two or more wireless IC tags that have no moisture in the immediate vicinity, which part of the covering means contains moisture and which part is dry. It is possible to detect whether the moisture content is contained or whether it is dry, and the information can be notified through the processing means.

第５の発明は、２．４５ＧＨｚ付近の周波数帯を用いる無線ＩＣタグを使用したことを特徴とする請求項１または３記載の水分検知センサであり、２．４５ＧＨｚ付近の周波数帯を用いる無線ＩＣタグを使用したので、周波数帯域の低い無線ＩＣタグよりも更に水分の影響を受けやすく、まわりに水分が多い時にはデータは読み取れなくなるので確実な水分検出が可能となる。   A fifth aspect of the present invention is the moisture detection sensor according to claim 1 or 3, wherein a wireless IC tag using a frequency band near 2.45 GHz is used, and the wireless IC uses a frequency band near 2.45 GHz. Since the tag is used, it is more susceptible to moisture than a wireless IC tag with a low frequency band, and data cannot be read when there is a lot of moisture in the surroundings, so that reliable moisture detection is possible.

以下、本発明の実施の形態について、図面を用いて一実施形態について詳細に説明する。なお、この実施の形態によって本発明が限定されるものではない。   Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

（実施の形態１）
図１は第１、および第２の発明の水分検知センサ、および、水分検知システムの構成一例を示す図であり、水分検知センサは無線ＩＣタグ１１の全部または一部を覆うあるいは接するように設けられた電磁波が透過可能かつ吸水性を有する被覆手段１２で構成されている。無線ＩＣタグ１１は電池を内蔵しないが、被覆手段１２が乾いている時には、読取手段１３が発生させる電磁波領域内に入ると、電磁波により励起され、無線ＩＣタグ１１に電源が供給される。 (Embodiment 1)
FIG. 1 is a diagram showing an example of the configuration of the moisture detection sensor and the moisture detection system of the first and second inventions, and the moisture detection sensor is provided so as to cover or touch all or part of the wireless IC tag 11. The coating means 12 is configured to be able to transmit the received electromagnetic wave and absorb water. The wireless IC tag 11 does not contain a battery. However, when the covering unit 12 is dry, the wireless IC tag 11 is excited by the electromagnetic wave when entering the electromagnetic wave region generated by the reading unit 13, and power is supplied to the wireless IC tag 11.

読取手段１３が発生する電磁波にはコマンドが含まれているので、そのコマンドを無線ＩＣタグ１１が受け取ると、無線ＩＣタグ１１は応答信号を送信するので、個別ＩＤを含むデータを読取手段１３が読み取ることが出来る。一方、被覆手段１２が濡れている時には無線ＩＣタグ１１は電磁波領域内であっても電磁波により励起されないのでデータを読取手段１３は無線ＩＣタグ１１よりデータを読み出すことが出来ない。   Since the electromagnetic wave generated by the reading unit 13 includes a command, when the wireless IC tag 11 receives the command, the wireless IC tag 11 transmits a response signal, so that the reading unit 13 reads data including the individual ID. Can be read. On the other hand, when the covering unit 12 is wet, the wireless IC tag 11 is not excited by the electromagnetic wave even in the electromagnetic wave region, so that the data reading unit 13 cannot read the data from the wireless IC tag 11.

つまり、被覆手段１２が乾いている時だけデータを読み出せることになる。一例として、患者のおむつの中に水分検知センサを設置、患者の近くの電磁波領域内に読取手段１３を設置、看護人詰め所に処理手段１４を設置しておくと、患者のおむつが濡れた時点で水分検知センサの無線ＩＣタグ１１からデータが読み出せなくなるので、濡れたことを看護人に報知できる。すなわち、看護人詰め所にいながらにして患者のおむつの状態を検知することが出来る。一定時間ごとにおむつの状態を確認する手間が著しく省ける。   That is, data can be read only when the covering means 12 is dry. As an example, when the moisture detection sensor is installed in the patient's diaper, the reading means 13 is installed in the electromagnetic wave region near the patient, and the processing means 14 is installed in the nurse's pad, the patient's diaper gets wet. Since the data cannot be read from the wireless IC tag 11 of the moisture detection sensor, it is possible to notify the nurse that it has been wet. That is, it is possible to detect the state of the patient's diaper while staying at the nurse station. This saves you the trouble of checking the state of the diaper at regular intervals.

また、物干しで乾燥させようとするＧパンのポケットに水分検知センサを設置、物干し竿の近くの電磁波領域内に読取手段１３を設置、リビングルームに処理手段１４を設置しておくと、Ｇパンが乾燥した時点で水分検知センサの無線ＩＣタグ１１からデータが読み出せるようになるので、洗濯物が乾燥したことをリビングルームで知ることが可能となる。   In addition, if a moisture detection sensor is installed in the pocket of the G pan to be dried with the clothesline, the reading means 13 is installed in the electromagnetic field near the clothesline, and the processing means 14 is installed in the living room, the G bread Since the data can be read from the wireless IC tag 11 of the moisture detection sensor at the time of drying, it is possible to know in the living room that the laundry has dried.

（実施の形態２）
図２は第３、および第４の発明の水分検知センサ、および、水分検知システムの構成一例を示す図であり、水分検知センサは２つ以上の無線ＩＣタグ１１Ａ、１１Ｂ、１１Ｃ、１１Ｄの全部または一部を覆うあるいは接するように設けられた電磁波が透過可能かつ吸水性を有する被覆手段１２で構成されている。 (Embodiment 2)
FIG. 2 is a diagram showing an example of the configuration of the moisture detection sensor and the moisture detection system of the third and fourth inventions, and the moisture detection sensor includes all of two or more wireless IC tags 11A, 11B, 11C, and 11D. Or it is comprised by the coating | coated means 12 which can permeate | transmit the electromagnetic waves provided so that one part might be covered or may contact, and has water absorption.

図中、被覆手段１２の破線で示された部分は水分を含んでいることを表現している。図においては無線ＩＣタグ１１Ｄのデータが読み取れないことになる。それ以外の無線ＩＣタグ１１Ａ、１１Ｂ、１１Ｃからはデータが読み出せることになる。つまり、被覆手段１２のどの部分が乾いているのか、どの部分に水分が含まれるのか、どの程度の割合が濡れているのかということが検知できる。   In the figure, the portion of the covering means 12 indicated by the broken line expresses that it contains moisture. In the figure, the data of the wireless IC tag 11D cannot be read. Data can be read from the other wireless IC tags 11A, 11B, and 11C. That is, it can be detected which part of the covering means 12 is dry, which part contains moisture, and what percentage is wet.

実施の形態１と同様に読取手段１３で読み出した無線ＩＣタグ１１Ａ、１１Ｂ、１１Ｃのデータを処理手段１４に送信し、乾燥状態を報知する水分検知装置として使用することも出来る。部分的に乾燥、つまり生乾き状態ということも検知できるので実施の形態１で示した洗濯物を生乾きで引き上げてアイロンを掛けるといった用途に使っても構わない。   Similarly to the first embodiment, the data of the wireless IC tags 11A, 11B, and 11C read by the reading unit 13 can be transmitted to the processing unit 14 and used as a moisture detection device that notifies the dry state. Since it is also possible to detect that it is partially dry, that is, a state of being freshly dried, the laundry shown in Embodiment 1 may be used for purposes such as pulling up the clothes by dry drying and ironing.

なお、実施の形態１、２のいずれにおいても無線ＩＣタグ１１には、現時点の日本でこの分野に使える周波数のうち、最も周波数帯の高いマイクロ波領域（２．５４ＧＨｚ）の物を用いることが効果的である。これは他の周波数帯の無線ＩＣタグよりも水の影響を受けやすく、水分により敏感に反応する。水分検出には２．５４ＧＨｚ帯の無線ＩＣタグが現時点で最適である。   Note that, in any of the first and second embodiments, the wireless IC tag 11 uses a microwave region (2.54 GHz) having the highest frequency band among the frequencies that can be used in this field in Japan at present. It is effective. This is more susceptible to water than wireless IC tags in other frequency bands, and reacts more sensitively to moisture. A wireless IC tag in the 2.54 GHz band is optimal for moisture detection at the present time.

なお、本実施例では非常に限られた用途だけを例として用いているが、乾燥あるいは水分を含んでいる状態を検知する場合に、基本的に第１〜第５で説明した発明は適用可能であり、いずれの場合にも同様の効果を有するものである。   In this embodiment, only a very limited application is used as an example. However, the invention described in the first to fifth aspects is basically applicable when detecting a dry or moisture-containing state. In both cases, the same effect is obtained.

本発明は、電磁波が透過可能かつ吸水性を有する電磁波透過吸水物質で無線ＩＣタグの全部または一部を覆うあるいは接するようにしたものであって、超短波あるいはマイクロ波領域の周波数帯を使用した電池を必要としないパッシブ型あって、被覆手段が水分を含んでいない時にだけデータ読み出しが可能となり、水分検出のためのセンサを別途追加する必要もなく、一般的な無線ＩＣタグと電磁波透過吸水物質だけの極めて簡単な構成で水分の有無を検出する水分検出センサを提供可能で、前記水分検出センサの無線ＩＣタグデータを読み出す読取手段とそのデータを受信し報知する処理手段により水分検出装置を構成することが出来る。   The present invention covers an all or part of a wireless IC tag with an electromagnetic wave transmitting water-absorbing substance that is capable of transmitting electromagnetic waves and has water absorption, and uses a frequency band in the ultra-short wave or microwave region. Is a passive type that does not require water, and data can be read only when the coating means does not contain moisture, and there is no need to add a separate sensor for moisture detection. It is possible to provide a moisture detection sensor that detects the presence or absence of moisture with an extremely simple configuration, and a moisture detection device is configured by reading means for reading out the wireless IC tag data of the moisture detection sensor and processing means for receiving and notifying the data I can do it.

また、液体は水に限らない。電波透過吸水物質は例えば布、綿である。   The liquid is not limited to water. The radio wave transmitting water absorbing material is, for example, cloth or cotton.

本発明の実施の形態１における水分検出センサとシステム構成の一例図1 is a diagram showing an example of a moisture detection sensor and a system configuration according to Embodiment 1 of the present invention. 本発明の実施の形態２における水分検出センサとシステム構成の一例図Example of moisture detection sensor and system configuration in Embodiment 2 of the present invention

符号の説明Explanation of symbols

１１ 無線ＩＣタグ
１２ 電磁波透過吸水物質（被覆手段）
１３ 読取手段
１４ 処理手段 11 wireless IC tag 12 electromagnetic wave transmission water absorbing substance (coating means)
13 Reading means 14 Processing means

Claims (5)

無線ＩＣタグと、前記無線ＩＣタグの全部または一部を覆うあるいは接するように設けられ、電磁波が透過可能かつ吸水性を有する被覆手段とから構成された水分検知センサ。 A moisture detection sensor comprising: a wireless IC tag; and a covering means provided so as to cover or be in contact with all or part of the wireless IC tag, and capable of transmitting electromagnetic waves and having water absorption. 無線ＩＣタグと、前記無線ＩＣタグの全部または一部を覆うあるいは接するように設けられ、電磁波が透過可能かつ吸水性を有する被覆手段と、前記無線ＩＣタグからデータを読み取るデータ読取手段と、前記データ読取手段よりデータを受信する処理手段とから構成された水分検知装置。 A wireless IC tag, a covering means provided so as to cover or touch all or a part of the wireless IC tag, and capable of transmitting electromagnetic waves and having water absorption; a data reading means for reading data from the wireless IC tag; A moisture detection apparatus comprising processing means for receiving data from a data reading means. ２つ以上の無線ＩＣタグと、前記２つ以上の無線ＩＣタグの全部または一部を覆うあるいは接するように設けられ、電磁波が透過可能かつ吸水性を有する被覆手段とから構成された水分検知センサ。 Moisture detection sensor comprising two or more wireless IC tags and a covering means provided so as to cover or be in contact with all or part of the two or more wireless IC tags and capable of transmitting electromagnetic waves and having water absorption . ２つ以上の無線ＩＣタグと、前記２つ以上の無線ＩＣタグの全部または一部を覆うあるいは接するように設けられ、電磁波が透過可能かつ吸水性を有する被覆手段と、前記２つ以上の無線ＩＣタグからデータを読み取るデータ読取手段と、前記データ読取手段よりデータを受信する処理手段とから構成された水分検知装置。 Two or more wireless IC tags, covering means provided so as to cover or touch all or part of the two or more wireless IC tags, and capable of transmitting electromagnetic waves and having water absorption properties; and the two or more wireless IC tags A moisture detection apparatus comprising data reading means for reading data from an IC tag and processing means for receiving data from the data reading means. ２．４５ＧＨｚ付近の周波数帯を用いる無線ＩＣタグを使用したことを特徴とする請求項１または３記載の水分検知センサ。 4. The moisture detection sensor according to claim 1, wherein a wireless IC tag using a frequency band near 2.45 GHz is used.
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JP2006201068A (en) * 2005-01-21 2006-08-03 Toppan Forms Co Ltd Moisture detecting member, and water leakage detection method
JP4500169B2 (en) * 2005-01-21 2010-07-14 トッパン・フォームズ株式会社 Moisture detection member and leak detection method
JP2014190857A (en) * 2013-03-27 2014-10-06 Denso Wave Inc Water content estimation system and radio tag reader
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JPWO2017094794A1 (en) * 2015-12-02 2018-10-04 株式会社村田製作所 Sanitary goods with RFID tags for moisture detection
US11357668B2 (en) 2015-12-02 2022-06-14 Murata Manufacturing Co., Ltd. Sanitary article equipped with moisture-detecting RFID tag
JP2018192080A (en) * 2017-05-19 2018-12-06 ダイオーエンジニアリング株式会社 Wet detection system of paper diaper
JP2019037292A (en) * 2017-08-22 2019-03-14 ダイオーエンジニアリング株式会社 Absorbent article
JP2019188159A (en) * 2019-05-20 2019-10-31 大王製紙株式会社 Wet detection system of paper diaper
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