JP6971462B2 - Moisture detection device and resonance circuit tag for moisture detection used in this device - Google Patents

Moisture detection device and resonance circuit tag for moisture detection used in this device Download PDF

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JP6971462B2
JP6971462B2 JP2017119309A JP2017119309A JP6971462B2 JP 6971462 B2 JP6971462 B2 JP 6971462B2 JP 2017119309 A JP2017119309 A JP 2017119309A JP 2017119309 A JP2017119309 A JP 2017119309A JP 6971462 B2 JP6971462 B2 JP 6971462B2
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義幸 梶野
敬二 江澤
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システムジャパンセールス株式会社
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Description

本発明は、パッシブタイプの電磁誘導方式を利用した水分検知装置、及びこの装置に用いる水分検知用の共振回路タグに関するものであり、詳しくは、共振回路タグの共振、非共振状態の遷移を利用して共振回路タグ内に浸水する水分を確実に素早く検知できるようにした水分検知装置、及びこの装置に用いる水分検知用の共振回路タグに関するものである。 The present invention relates to a moisture detection device using a passive type electromagnetic induction method, and a resonance circuit tag for moisture detection used in this device. Specifically, the resonance and non-resonance state transitions of the resonance circuit tag are used. The present invention relates to a moisture detection device capable of reliably and quickly detecting the moisture infiltrating into the resonance circuit tag, and a resonance circuit tag for moisture detection used in this device.

従来からRFID(Radio Frequency Identification Device)技術を利用した水分検知装置及び水分検知用タグは、成人用或いは幼児用のおむつの排尿検知、自動車、飛行機等の液体漏れ検知、土壌、地下の水分検知、点滴漏れ、等に広く応用され、工業、産業、医療、介護・福祉を含む多方面の分野で実用化されている。 Conventionally, moisture detection devices and moisture detection tags using RFID (Radio Frequency Identification Device) technology have been used for diaper urination detection for adults and infants, liquid leakage detection for automobiles, airplanes, etc., soil and underground moisture detection, etc. It is widely applied to drip leakage, etc., and has been put to practical use in various fields including industry, industry, medical care, nursing care and welfare.

特に、おむつへの排尿検知応用は、排尿検知機能として高齢化、介護者の増大により需要が拡大し、一層利便性が高く、軽量、小型の製品が求められている。 In particular, for the application of urination detection to diapers, the demand for urination detection function is increasing due to the aging of the population and the increase in caregivers, and there is a demand for more convenient, lightweight and compact products.

おむつへ排尿検知を適用することで、排尿を検知し、適切におむつの取替・交換時期を通報することが可能となる。 By applying urination detection to diapers, it is possible to detect urination and appropriately notify the diaper replacement / replacement time.

これにより、おむつ利用者や介護される側は不快感を軽減することができ、利用者の不快感を取り除くだけでなく、排泄物の刺激から肌を守り、肌トラブルを防止することができると共に定期的におむつ交換チェックを行う必要がなくなり介護する側の負担軽減に役立ち、衛生的環境を維持することが可能となる As a result, the diaper user and the caregiver can reduce the discomfort, not only remove the discomfort of the user, but also protect the skin from the irritation of excrement and prevent skin troubles. It is not necessary to check the diaper change regularly, which helps reduce the burden on the caregiver and makes it possible to maintain a hygienic environment.

このようなRFID技術による水分検知技術としては、LC共振回路を形成するタグ部分とアンテナとの間を電磁誘導により共振結合し、共振周波数の変化を検知する方式が種々提案されている。 As a moisture detection technique based on such RFID technology, various methods have been proposed in which a tag portion forming an LC resonance circuit and an antenna are resonantly coupled by electromagnetic induction to detect a change in resonance frequency.

水分検知方式をおむつに応用した例としては、水分や排尿成分によりインピーダンス変化を電極構造を用いて検知する方式(特許文献1:特表2002−515975号:ノックス)や、キャパシタンス容量の変化を検知する方式(特許文献2:特開2001−1161732号:松下電工)等が提案されている。 Examples of applications of the moisture detection method to diapers include a method of detecting impedance changes due to moisture and urination components using an electrode structure (Patent Document 1: Japanese Patent Application Laid-Open No. 2002-515975: Knox) and detection of changes in capacitance capacity. (Patent Document 2: Japanese Patent Application Laid-Open No. 2001-1161732: Matsushita Electric Works) and the like have been proposed.

すなわち、特許文献1には、おむつ内に2本の電極を配設し、湿気による電極間の抵抗値(インピーダンス)低下に応答してアラーム音を発する構成が提案されている。 That is, Patent Document 1 proposes a configuration in which two electrodes are arranged in a diaper and an alarm sound is emitted in response to a decrease in resistance value (impedance) between the electrodes due to humidity.

しかし、このようなインピーダンスの変化を電極で検知する方式においては、装置が比較的大型となり、非接触タイプとして用いるには別途発信装置や共振装置が必要となるため、小型、軽量で、利便性を求められるおむつ等への適用には課題が多く存在する。 However, in the method of detecting such a change in impedance with electrodes, the device is relatively large, and a separate transmitter and resonance device are required to use it as a non-contact type, so it is compact, lightweight, and convenient. There are many problems in applying it to diapers and the like that require this.

特許文献2には、電磁誘導を利用してLC共振回路を検知タグで形成し、水分吸収により共振回路のキャパシタンス変化及び共振周波数の変化を利用して、水分検知を行う方式が提案されている。 Patent Document 2 proposes a method in which an LC resonance circuit is formed by a detection tag by using electromagnetic induction, and moisture detection is performed by utilizing a change in capacitance of the resonance circuit and a change in resonance frequency by water absorption. ..

このような電磁誘導方式によれば、LC共振回路によるタグと近くに配設されたアンテナとの間を電磁誘導により信号伝達できるため、非接触、非拘束タイプとすることが可能となり、かつ、小型、軽量のタグを構成することができるため、おむつ等の排尿検知に適している。 According to such an electromagnetic induction method, since a signal can be transmitted by electromagnetic induction between the tag by the LC resonance circuit and the antenna arranged nearby, it is possible to make a non-contact and non-constraining type, and Since a small and lightweight tag can be configured, it is suitable for detecting urination of diapers and the like.

しかし、特許文献2におけるLC共振回路の構成においては、排尿成分によりキャパシタンス又は共振周波数を急激に変化させることは困難であり、そのため排尿が生じても直ちに検知できなかったり、利用者の体動により検知スピードが異なったりして、確実な排尿検知が出来ないという課題があった。 However, in the configuration of the LC resonance circuit in Patent Document 2, it is difficult to suddenly change the capacitance or the resonance frequency by the urination component, so that even if urination occurs, it cannot be detected immediately or it depends on the body movement of the user. There was a problem that reliable urination detection could not be performed because the detection speed was different.

特表2002−515975号公報Special Table 2002-515975 Gazette 特開2001−161732号公報Japanese Unexamined Patent Publication No. 2001-161732

本発明は、前記特許文献2の水分検知装置の改良に関するものであり、パッシブ型共振LC回路で構成された共振回路タグにおける共振状態、非共振状態の遷移時を捉えて水分検知を行い、共振回路タグとアンテナとの間で、電磁誘導による信号伝達を行い水検知信号を出力する水分検知装置を構成し、かつ、共振回路タグを構成するコイルの上部をは水分調整層である絶縁層により覆う構成で水分(排尿)を確実に素早く検知することを可能とする水分検知装置を提供するものである。 The present invention relates to the improvement of the moisture detection device of Patent Document 2, and detects the transition of the resonance state and the non-resonance state in the resonance circuit tag configured by the passive resonance LC circuit to detect the moisture and resonate. A moisture detection device that transmits a signal by electromagnetic induction and outputs a water detection signal is configured between the circuit tag and the antenna, and the upper part of the coil that constitutes the resonance circuit tag is formed by an insulating layer that is a moisture adjustment layer. It provides a moisture detection device that enables reliable and quick detection of moisture (urination) with a covering configuration.

また、本発明は、出力される水分検知信号(排尿信号)を介護者が認識し、おむつ交換を行うまでの一定時間保持する機能を有する前記水分検知装置に用いる共振回路タグを提供するものである。 The present invention also provides a resonance circuit tag used in the moisture detection device having a function of recognizing an output moisture detection signal (urination signal) and holding the output moisture detection signal (urination signal) for a certain period of time until the diaper is changed. be.

本発明に係る水分検知装置は、誘電体を表電極、裏電極で挟持して構成されたコンデンサと、該コンデンサの表電極、裏電極と接続された矩形巻回パターン状のコイルとを具備し、前記コンデンサ、コイルの共振状態又は非共振状態の出力信号又は水分浸入に伴う前記コンデンサの表電極、裏電極の短絡に伴うキャパシタンス変化による共振状態、非共振状態の遷移時に対応した出力信号を出力する共振回路タグと、前記矩形巻回パターン状のコイルの上部を覆う薄膜絶縁材で形成した水分を一定期間保持する水分調整層である絶縁層と、前記共振回路タグのコイルと電磁誘導により結合し、前記共振回路タグからの出力信号に対応したアンテナ出力信号を送出するアンテナコイルを具備するアンテナと、前記共振回路タグの共振状態、非共振状態の遷移時に対応した前記アンテナからのアンテナ出力信号に応じて水分検知信号を出力する制御手段と、を有することを最も主要な特徴とする。 The moisture detection device according to the present invention includes a capacitor configured by sandwiching a dielectric between a front electrode and a back electrode, and a rectangular winding pattern coil connected to the front electrode and the back electrode of the capacitor. Outputs the output signal of the capacitor, the resonance state or the non-resonance state of the coil, or the output signal corresponding to the transition of the resonance state and the non-resonance state due to the capacitance change due to the short circuit of the front electrode and the back electrode of the capacitor due to the infiltration of moisture. coupling a resonant circuit tag, an insulating layer is moisture control layer that retains a certain period the water formed in the thin film insulating material covering the top of the rectangular winding pattern of the coil by the electromagnetic induction coil of the resonance circuit tag An antenna provided with an antenna coil that sends out an antenna output signal corresponding to the output signal from the resonance circuit tag, and an antenna output signal from the antenna corresponding to the transition between the resonance state and the non-resonance state of the resonance circuit tag. The most important feature is to have a control means for outputting a moisture detection signal according to the resonance.

請求項1記載の発明によれば、共振回路タグへの水分浸水に伴うコンデンサの表電極、裏電極の短絡に応じた前記共振回路タグの共振状態、非共振状態の遷移時に対応した出力信号を電磁誘導により取得し、水分検知信号を出力することができ、かつ、コイルの上部を覆う薄膜絶縁材で形成した水分を一定期間保持する水分調整層である絶縁層を備える構成で、水分を確実に素早く検知することが可能でおむつ等に利用して好適な斬新な水分検知装置を実現し提供することができる。 According to the invention according to claim 1, the output signal corresponding to the transition of the resonance state and the non-resonance state of the resonance circuit tag corresponding to the short circuit of the front electrode and the back electrode of the capacitor due to the water immersion in the resonance circuit tag is obtained. It is configured to have an insulating layer that can be acquired by electromagnetic induction and output a moisture detection signal, and is a moisture adjusting layer that retains moisture formed by a thin film insulating material that covers the upper part of the coil for a certain period of time , ensuring moisture. It is possible to quickly detect and realize and provide a novel moisture detection device suitable for use in diapers and the like.

請求項2記載の発明によれば、誘電体を表電極と裏電極とで挟持して構成されたコンデンサと、該コンデンサの表電極、裏電極と接続されたコイルとを具備する構成の基に、水分浸入に伴う前記コンデンサの表電極、裏電極の短絡に伴うキャパシタンス変化を利用して前記コンデンサ、コイルによる共振状態、非共振状態の遷移時に対応した水分検知を示す出力信号を得ることができ、かつ、前記コンデンサの表電極を、複数の表電極により構成し、水分の浸水に応じて前記コンデンサの複数の表電極を短絡することで前記コンデンサのキャパシタンスを実質的に変化させるように構成して、おむつ用として好適な斬新な水分検知用の共振回路タグを実現し提供することができる。 According to the invention according to claim 2 , it is based on a configuration including a capacitor configured by sandwiching a dielectric between a front electrode and a back electrode, and a coil connected to the front electrode and the back electrode of the capacitor. It is possible to obtain an output signal indicating moisture detection corresponding to the transition of the resonance state and the non-resonance state by the capacitor and the coil by utilizing the capacitance change due to the short circuit of the front electrode and the back electrode of the capacitor due to the infiltration of water. In addition, the front electrode of the capacitor is composed of a plurality of front electrodes, and the capacitance of the capacitor is substantially changed by short-circuiting the plurality of front electrodes of the capacitor in response to the infiltration of moisture. Te, to achieve resonant circuit tag for suitable novel moisture detection as a diaper can be provided.

請求項3記載の発明によれば、誘電体を表電極と裏電極とで挟持して構成されたコンデンサと、該コンデンサの表電極、裏電極と接続されたコイルとを具備する構成の基に、水分浸入に伴う前記コンデンサの表電極、裏電極の短絡に伴うキャパシタンス変化を利用して前記コンデンサ、コイルによる共振状態、非共振状態の遷移時に対応した水分検知を示す出力信号を得ることができ、かつ、前記コイルの一端部を前記コンデンサの表電極に接続し、前記コイルの他端部には前記コンデンサの裏電極に接続するための導電材を用いた貫通孔部が設けられ、前記貫通孔部分で前記コイルの他端部と前記コンデンサの裏電極とを電気的に接続するとともに、水分が浸水されると前記貫通孔を介して当該水分が裏電極に達し、前記コンデンサの表電極と裏電極とを短絡状態にして前記コンデンサのキャパシタンスを実質的に変化させる構成として、水分検知を示す出力信号を得ることができ、おむつ用として好適な斬新な水分検知用の共振回路タグを実現し提供することができる。 According to the invention of claim 3, the base of the configuration includes a capacitor configured by sandwiching a dielectric between a front electrode and a back electrode, and a coil connected to the front electrode and the back electrode of the capacitor. It is possible to obtain an output signal indicating moisture detection corresponding to the transition between the resonance state and the non-resonance state by the capacitor and the coil by utilizing the capacitance change due to the short circuit of the front electrode and the back electrode of the capacitor due to the infiltration of water. In addition, one end of the coil is connected to the front electrode of the capacitor, and the other end of the coil is provided with a through hole portion using a conductive material for connecting to the back electrode of the capacitor. The other end of the coil and the back electrode of the capacitor are electrically connected at the hole portion, and when water is infiltrated, the water reaches the back electrode through the through hole and becomes the front electrode of the capacitor. An output signal indicating moisture detection can be obtained as a configuration that substantially changes the capacitance of the capacitor by short-circuiting the back electrode, and a novel resonance circuit tag for moisture detection suitable for diapers is realized. Can be provided.

図1は本発明の実施例に係る水分検知装置を構成する水分検知用の共振回路タグの構成を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing a configuration of a resonance circuit tag for moisture detection constituting the moisture detection device according to the embodiment of the present invention. 図2は図1のA−A線拡大断面図である。FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG. 図3は図1のB−B線拡大断面及び水分の浸入状態を示す概略図である。FIG. 3 is a schematic view showing an enlarged cross section taken along line BB of FIG. 1 and a state of water infiltration. 図4は本実施例に係る水分検知用の共振回路タグにおいてコンデンサの表電極及び裏電極が水分により短絡された状態を示す概略説明図である。FIG. 4 is a schematic explanatory view showing a state in which the front electrode and the back electrode of the capacitor are short-circuited by moisture in the resonance circuit tag for moisture detection according to this embodiment. 図5は本実施例に係る水分検知装置の全体構成を示す概略説明図である。FIG. 5 is a schematic explanatory view showing the overall configuration of the moisture detection device according to the present embodiment. 図6は本実施例に係る水分検知装置の概略回路構成図である。FIG. 6 is a schematic circuit configuration diagram of the moisture detection device according to this embodiment. 図7は本実施例に係る水分検知用の共振回路タグの第1変形例の概略構成図である。FIG. 7 is a schematic configuration diagram of a first modification of the resonance circuit tag for moisture detection according to this embodiment. 図8は本実施例に係る水分検知用の共振回路タグの第2変形例の概略構成図である。FIG. 8 is a schematic configuration diagram of a second modification of the resonance circuit tag for moisture detection according to this embodiment. 図9は水分検知用の共振回路タグの第2変形例を採用した場合の水分検知装置の概略回路構成図である。FIG. 9 is a schematic circuit configuration diagram of a moisture detection device when a second modification of the resonance circuit tag for moisture detection is adopted. 図10は本実施例による水分検知用の共振回路タグの第3変形例の概略構成図である。FIG. 10 is a schematic configuration diagram of a third modification of the resonance circuit tag for moisture detection according to the present embodiment.

本発明は、電磁誘導を利用したパッシブ型の共振回路タグにより水分を検知し、近くに配置されたアンテナを介して共振回路タグの共振状態、非共振状態の遷移を検知することで水分検知信号を出力する水分検知装置であって、水分検知を一層確実に実現できるようにしたものである。 In the present invention, moisture is detected by a passive resonance circuit tag using electromagnetic induction, and a moisture detection signal is detected by detecting the transition between the resonance state and the non-resonance state of the resonance circuit tag via an antenna arranged nearby. It is a moisture detection device that outputs moisture so that moisture detection can be realized more reliably.

多くのRFID技術に基づくタグ部分は、測定対象を特定し、対象物や人の識別情報や個人情報信号と結びつけて、信号の授受を記録したり、演算処理するためのICタグを保有しているが、本発明に係る共振回路タグは、ICタグを保有しておらず、コイル及びコンデンサからなる小型、軽量、バッテリーレスの簡略構成としている。 The tag part based on many RFID technologies has an IC tag for identifying the measurement target, linking it with the identification information of the object or person and the personal information signal, recording the transmission and reception of the signal, and performing arithmetic processing. However, the resonant circuit tag according to the present invention does not have an IC tag, and has a small, lightweight, battery-less simplified configuration composed of a coil and a capacitor.

また、本発明に係る共振回路タグは、誘電体基板上にコンデンサ用の電極、及び、コイルをエッチング等により薄膜状に形成するだけで構成できるため、極めて安価に小型、軽量の共振回路タグを得ることができる。 Further, since the resonance circuit tag according to the present invention can be configured only by forming an electrode for a capacitor and a coil in a thin film shape by etching or the like on a dielectric substrate, a compact and lightweight resonance circuit tag can be obtained at an extremely low cost. Obtainable.

本発明の共振回路タグの構成では、コイルとコンデンサにより構成された共振回路タグに水分が浸水するとコンデンサを構成している電極部分が水分により短絡され、コンデンサの容量性リアクタンスを変化させ、その共振状態の遷移時の共振回路タグの出力信号を電磁誘導により共振回路タグの近傍に配置されたアンテナに伝達し、更にアンテナに接続された制御手段である送受信コントローラにより共振状態の遷移時に対応する出力信号に応じた水分検知信号を出力する。 In the configuration of the resonant circuit tag of the present invention, when moisture infiltrates into the resonant circuit tag composed of the coil and the capacitor, the electrode portion constituting the capacitor is short-circuited by the moisture, the capacitive reactor of the capacitor is changed, and the resonance thereof. The output signal of the resonant circuit tag at the transition of the state is transmitted to the antenna arranged in the vicinity of the resonant circuit tag by electromagnetic induction, and the output corresponding to the transition of the resonant state is further performed by the transmission / reception controller which is the control means connected to the antenna. Outputs a moisture detection signal according to the signal.

また、一層効果的、かつ、確実に水分を検知するために誘電体からなる基板に貫通孔が設けられており、この貫通孔を介して浸水する水分がコンデンサを構成している両電極を短絡状態とし、共振状態、非共振状態の遷移を実現する。 Further, in order to detect moisture more effectively and reliably, a through hole is provided in the substrate made of a dielectric, and the moisture infiltrating through the through hole short-circuits both electrodes constituting the capacitor. The state is set, and the transition between the resonance state and the non-resonance state is realized.

このような構成により、共振回路タグとアンテナとの電磁誘導結合を利用して非拘束状態で水分検知できるため、例えば、成人用おむつや幼児用おむつ等での排尿検知用途に好適に応用できる。 With such a configuration, moisture can be detected in an unconstrained state by using the electromagnetic induction coupling between the resonance circuit tag and the antenna, so that it can be suitably applied to, for example, urination detection applications in adult diapers, infant diapers and the like.

おむつ等への応用にあたっては、おむつ側に共振回路タグを取り付け、ベッド等のおむつの近傍領域にアンテナを配置することで、排尿検知用の水分検知装置を構成することができる。 For application to diapers and the like, a moisture detection device for urination detection can be configured by attaching a resonance circuit tag to the diaper side and arranging an antenna in a region near the diaper such as a bed.

また、本発明では、コンデンサの両電極面に水分を浸水させる貫通孔の両側に水分吸収体が配置されていることにより、本発明のおむつへの用においては、共振回路タグが上下左右のいかなる配置状態にあっても確実に水分(排尿)検知を実現でき、更におむつの交換が行われるか、介護者が水分検知信号(おむつ交換信号)を認識するまで一定時間水分検知信号の出力を維持し続けるように構成することができる。 Further, in the present invention, since the moisture absorbers are arranged on both sides of the through holes for allowing moisture to enter on both electrode surfaces of the capacitor, the resonance circuit tag can be used on any of the top, bottom, left and right for the diaper of the present invention. Moisture (urination) detection can be reliably realized even in the placed state, and the output of the moisture detection signal is maintained for a certain period of time until the diaper is replaced or the caregiver recognizes the moisture detection signal (diaper replacement signal). Can be configured to continue.

以下に、本発明の実施例に係る水分検知装置及びこの装置に用いる水分検知用の共振回路タグについて、図面を参照して詳細に説明する。 Hereinafter, the moisture detection device according to the embodiment of the present invention and the resonance circuit tag for moisture detection used in this device will be described in detail with reference to the drawings.

なお、いずれの図面も本発明の説明用に概略的な模式図として描かれており、実際の寸法や形状、構成は特に限定するものではない。 It should be noted that each of the drawings is drawn as a schematic schematic diagram for the purpose of explaining the present invention, and the actual dimensions, shape, and configuration are not particularly limited.

図1乃至図3は、本発明の実施例に係る水分検知装置11を構成する水分検知用の共振回路タグ1の構成を示すものである。
本実施例に係る水分検知用の共振回路タグ1は、平坦な誘電体基板(以下「基板」という)2の両面(表面、裏面)に各々表電極4a、裏電極4bを対向配置に設けて容量性リアクタンスを有するコンデンサ4を構成するとともに、前記基板2の表面に前記コンデンサ4の表電極4aと一端部が接続された矩形巻回パターン状の誘導性リアクタンスを有するコイル3を具備している。
1 to 3 show the configuration of the resonance circuit tag 1 for moisture detection constituting the moisture detection device 11 according to the embodiment of the present invention.
In the reactance circuit tag 1 for moisture detection according to the present embodiment, the front electrodes 4a and the back electrodes 4b are provided on both sides (front surface and back surface) of a flat dielectric substrate (hereinafter referred to as “substrate”) 2 in opposite arrangements. A capacitor 4 having a capacitive reactance is configured, and a coil 3 having an inductive reactance in a rectangular winding pattern in which one end is connected to a surface electrode 4a of the capacitor 4 is provided on the surface of the substrate 2. ..

また、前記コイル3の他端部はその他端部の領域に設けたLC接合点部5を介して前記基板2の裏面に配置された裏電極4bに接続しLC共振回路を形成している。 Further, the other end of the coil 3 is connected to the back electrode 4b arranged on the back surface of the substrate 2 via the LC junction 5 provided in the region of the other end to form an LC resonance circuit.

詳述すると、前記コンデンサ4の表電極4a及び裏電極4bは、前記基板2を挟持して、相対向した位置に配置されてコンデンサ4を形成し、前記コイル3とコンデンサ4とにより、共振回路タグ1を形成し、この共振回路タグ1の近傍に配置されたアンテナ50との間で電磁誘導結合を行うように構成している。 More specifically, the front electrode 4a and the back electrode 4b of the capacitor 4 sandwich the substrate 2 and are arranged at opposite positions to form the capacitor 4, and the coil 3 and the capacitor 4 form a resonance circuit. A tag 1 is formed, and an electromagnetic induction coupling is performed with an antenna 50 arranged in the vicinity of the resonance circuit tag 1.

前記コイル3、コンデンサ4の表電極4a、裏電極4bの作成態様は、アルミニウム、銅、チタン、銀、金等の導電性金属を用いた薄膜加工(エッチング処理等)のような加工がし易く、かつ、柔軟性を発揮するようなものが好ましい。 The mode of creating the front electrode 4a and the back electrode 4b of the coil 3 and the capacitor 4 is easy to process such as thin film processing (etching processing or the like) using a conductive metal such as aluminum, copper, titanium, silver, or gold. Moreover, it is preferable that the material exhibits flexibility.

前記LC接合点部5は、導電材からなる円筒状ハトメ状部材や中空リベット材などを使用しても良く、また、コイル3端部の導電性金属薄膜及び裏電極4b端部の導電性金属薄膜を、前記基板2の表面から裏面へかけてかしめ工法等により形成することで、この基板2と一体化されている。 For the LC junction portion 5, a cylindrical eyelet-shaped member made of a conductive material, a hollow rivet material, or the like may be used, and the conductive metal thin film at the end of the coil 3 and the conductive metal at the end of the back electrode 4b. The thin film is formed from the front surface to the back surface of the substrate 2 by a caulking method or the like to be integrated with the substrate 2.

前記LC接合点部5は、図3に示すように、前記基板2の表面側で前記コイル3の他端部と接合し、前記基板2を貫き、前記基板2の裏面側で前記裏電極4bと接合している。 As shown in FIG. 3, the LC junction portion 5 is bonded to the other end of the coil 3 on the front surface side of the substrate 2, penetrates the substrate 2, and has the back electrode 4b on the back surface side of the substrate 2. It is joined with.

また、前記LC接合点部5は、図3に示すように、前記コイル3の表面側から基板2の肉厚部を貫き前記裏電極4bの裏面側に至る水分浸水用の貫通孔5aを具備している。 Further, as shown in FIG. 3, the LC junction portion 5 includes a through hole 5a for water immersion that penetrates the thick portion of the substrate 2 from the front surface side of the coil 3 and reaches the back surface side of the back electrode 4b. doing.

また、前記LC接合点部5は、前記コイル3の他端部とコンデンサ4の裏電極4aとを接続することと、貫通孔5aを形成することの両方の機能を備えることが肝要となる。 Further, it is important that the LC junction portion 5 has both functions of connecting the other end of the coil 3 and the back electrode 4a of the capacitor 4 and forming a through hole 5a.

前記貫通孔5aは、例えば直径0.1mmから0.5mm程度のサイズが好ましく、また、この貫通孔5aは、電気的接続を確実とし、水分誘導を行い易くするためにLC接合点部5の領域で複数個形成する構成としても良い。 The through hole 5a preferably has a size of, for example, about 0.1 mm to 0.5 mm in diameter, and the through hole 5a is formed in the LC joint point portion 5 in order to ensure electrical connection and facilitate moisture induction. A plurality of regions may be formed.

図1に示す共振回路タグ1をおむつ等の水分検知用として用いる場合、おむつの排尿部分に共振タグ1を添着して使用する。 When the resonance circuit tag 1 shown in FIG. 1 is used for detecting moisture in a diaper or the like, the resonance tag 1 is attached to the urination portion of the diaper.

図2は、図1に示すコンデンサ4における矢印A−A線の断面を拡大したものであり、この共振回路タグ1をおむつへ装着した場合のおむつ側の表面材である吸水材(水分吸収材)24も併せて示している。 FIG. 2 is an enlargement of the cross section of the arrow AA line in the capacitor 4 shown in FIG. 1, and is a water absorbing material (moisture absorbing material) which is a surface material on the diaper side when the resonance circuit tag 1 is attached to the diaper. ) 24 is also shown.

また、図2において、同図の上部側は人肌側で、下部側はおむつ側である。人肌に接触する側にはポリオレフィンやポリエステル不織布等の素材からなる不織布21、吸水材21aが積層状態で接着層23aを用いて添着されて前記共振回路タグ1を保護しており、また、おむつ側は、おむつ側のポリオレフィンやポリエステル不織布等の素材からなる表面材24を接着層23bを用いて前記共振回路タグ1に添着して使用する。 Further, in FIG. 2, the upper side of the figure is the human skin side, and the lower side is the diaper side. A non-woven fabric 21 made of a material such as polyolefin or polyester non-woven fabric and a water-absorbing material 21a are attached to the side in contact with human skin using an adhesive layer 23a in a laminated state to protect the resonance circuit tag 1 and also to protect a diaper. On the side, a surface material 24 made of a material such as polyolefin or polyester non-woven fabric on the diaper side is attached to the resonance circuit tag 1 by using an adhesive layer 23b.

前記不織布21は、吸水性と吸汗性を有し、その下部にある吸水材21aへ水を誘導する役割を有する。 The non-woven fabric 21 has water absorption and sweat absorption, and has a role of inducing water to the water absorption material 21a under the non-woven fabric 21.

上述したように、本実施例の共振回路タグ1は、基板2を挟んでコンデンサ4の表電極4a及び裏電極4bが薄膜形成され、表電極4aの上部(人肌側)には吸水材21aが接着層23aを介して添接着されている。 As described above, in the resonance circuit tag 1 of the present embodiment, the front electrode 4a and the back electrode 4b of the capacitor 4 are formed as thin films with the substrate 2 interposed therebetween, and the water absorbing material 21a is formed on the upper portion (human skin side) of the front electrode 4a. Is bonded via the adhesive layer 23a.

この吸水材21aは、ポリオレフィン吸水材、高分子吸水材又は紙(吸水紙)等の素材で構成され水分を吸収し、保持する役割を有する。 The water-absorbing material 21a is made of a material such as a polyolefin water-absorbing material, a polymer water-absorbing material, or paper (water-absorbing paper), and has a role of absorbing and retaining water.

前記不織布21は、吸水性だけでなく人肌に接するため吸水材21aへ水分を吸収させたあとは水分が逆戻りせず、速乾性をもたせるような素材で構成するため、不織布21と吸水材21aとはそれぞれ別の素材を用いるのが好ましいが、吸水性素材で構成すれば必ずしも別体にする必要もない。 Since the non-woven fabric 21 not only absorbs water but also comes into contact with human skin, the non-woven fabric 21 and the water-absorbing material 21a are made of a material that does not revert the water after being absorbed by the water-absorbing material 21a and has quick-drying properties. It is preferable to use different materials from each other, but it is not always necessary to use different materials if they are made of a water-absorbent material.

前記裏電極4bは、接着層23bによりおむつ側の表面材24に接着される。前述の接着層23a及び23bは、コンデンサ4の表電極4a、裏電極4bに水分を誘導する必要があるため全面に接着剤を塗布するのでなく離散させた状態で各電極面に撒布し吸水材21a、吸水材24と接着させ、水分が吸収されるとこの水分を表電極4aから裏電極4bへと誘導する。 The back electrode 4b is adhered to the surface material 24 on the diaper side by the adhesive layer 23b. Since it is necessary to induce moisture to the front electrode 4a and the back electrode 4b of the capacitor 4, the above-mentioned adhesive layers 23a and 23b are not coated with an adhesive on the entire surface but are sprayed on each electrode surface in a dispersed state to be a water absorbing material. 21a is adhered to the water absorbing material 24, and when the water is absorbed, the water is guided from the front electrode 4a to the back electrode 4b.

図3は図1のB−B線の断面を拡大して示すものである。 FIG. 3 is an enlarged cross section of the line BB of FIG. 1.

図3においては本実施例の共振回路タグ1をおむつ側へ添着させた状態を示しており、上部が人肌側で下部がおむつ側を示している。 FIG. 3 shows a state in which the resonance circuit tag 1 of this embodiment is attached to the diaper side, and the upper part shows the human skin side and the lower part shows the diaper side.

前記不織布21の下部には吸水材21aが配置されており、LC接合点部5はコイル3の端部と裏面電極4bとを接続すると共に、水分を表電極4aから裏電極4bへ誘導できるように基板2を貫通して貫通孔5aが設けられている。 A water absorbing material 21a is arranged in the lower part of the nonwoven fabric 21, so that the LC junction 5 connects the end of the coil 3 and the back surface electrode 4b and can guide moisture from the front electrode 4a to the back electrode 4b. Is provided with a through hole 5a through the substrate 2.

前記吸水材21aとおむつ側の吸水材24とは離散状態に散布された接着層23a及び23bにより各々表電極4a及び裏電極4bへそれぞれ密着状態で添着している。 The water-absorbing material 21a and the water-absorbing material 24 on the diaper side are adhered to the front electrode 4a and the back electrode 4b, respectively, by the adhesive layers 23a and 23b scattered in a discrete state.

また、コイル3の上部には水分調整層である絶縁層25が設けられている。 Further, an insulating layer 25, which is a moisture adjusting layer, is provided on the upper part of the coil 3.

この絶縁層25は、コンデンサ4の表電極4a及びLC接合点部(貫通孔5a)5以外の主としてコイル3を覆っている。 The insulating layer 25 mainly covers the coil 3 other than the surface electrode 4a of the capacitor 4 and the LC junction (through hole 5a) 5.

この絶縁層25は、水分(排尿成分)が導電性成分を含むため共振周波数が意図しない変化を起こすのを防止する。この絶縁層25はポリエチレン等の薄膜絶縁材で形成している。また、この絶縁層25は、前記吸水材21aとともに誘導した水分を一定時間保持する機能も有している。 The insulating layer 25 prevents the resonance frequency from unintentionally changing because the water content (urination component) contains a conductive component. The insulating layer 25 is made of a thin film insulating material such as polyethylene. Further, the insulating layer 25 also has a function of retaining the moisture induced together with the water absorbing material 21a for a certain period of time.

図3に示す共振回路タグ1において、排尿がおこなわれると同図に矢印で示す水分(排尿成分)は、不織布21から吸水材21aへ吸収され、表電極4aへ接触すると共に、貫通孔5aを介して下部にある吸水材24へと浸水する。 In the resonance circuit tag 1 shown in FIG. 3, when urination is performed, the water (urination component) indicated by the arrow in the figure is absorbed from the non-woven fabric 21 to the water absorbing material 21a, contacts the surface electrode 4a, and forms the through hole 5a. It is flooded into the water absorbing material 24 at the lower part through the water absorbing material 24.

そして、前記吸水材24へ誘導される水分は裏電極4bへ達し、前記コンデンサ4の表電極4aと裏電極4bとは短絡状態となり、この結果、前記共振回路タグ1のコイル3、コンデンサ4からなるLC共振回路は共振状態から非共振状態へ、又は、非共振状態から共振状態へて遷移する。 Then, the water induced to the water absorbing material 24 reaches the back electrode 4b, and the front electrode 4a and the back electrode 4b of the capacitor 4 are in a short-circuited state. As a result, from the coil 3 and the capacitor 4 of the resonance circuit tag 1. The LC resonance circuit transitions from a resonant state to a non-resonant state or from a non-resonant state to a resonant state.

図4は、本実施例に係る共振回路タグ1において、コンデンサ4の表電極4a及び裏電極4bが水分により短絡された状態を示す説明図である。 FIG. 4 is an explanatory diagram showing a state in which the front electrode 4a and the back electrode 4b of the capacitor 4 are short-circuited by water in the resonance circuit tag 1 according to the present embodiment.

前記貫通孔5aの周辺領域では、水分40が基板2の表面と裏面とを覆っているが、コイル3の上面に設けた絶縁層25により水分がコイル3のリアクタンスには影響を及ぼさないように構成している。 In the peripheral region of the through hole 5a, the moisture 40 covers the front surface and the back surface of the substrate 2, but the insulating layer 25 provided on the upper surface of the coil 3 prevents the moisture from affecting the reactance of the coil 3. It is composed.

前記貫通孔5aは、1mm以下の微小穴で形成されるため通常の状態では表面張力により水分が貫通孔5aを経て裏電極4b側に誘導されることは困難であるが、貫通孔5aの両側に前記吸水材21a及びおむつ側の吸水材24が存在することで、容易に水分は貫通孔5を経て裏電極4b側に誘導することができる。 Since the through hole 5a is formed of a minute hole of 1 mm or less, it is difficult for water to be guided to the back electrode 4b side through the through hole 5a by surface tension under normal conditions, but both sides of the through hole 5a. By the presence of the water absorbing material 21a and the water absorbing material 24 on the diaper side, moisture can be easily guided to the back electrode 4b side through the through hole 5.

なお、本実施例では、おむつ側の吸水材24を利用する構成としているが、これに替えて本実施例に係る共振回路タグ1自体に吸水材を別途付加する構成とすることも勿論可能である。 In this embodiment, the water absorbing material 24 on the diaper side is used, but it is of course possible to separately add the water absorbing material to the resonance circuit tag 1 itself according to the present embodiment. be.

図5は、本実施例に係る水分検知装置11の全体構成を示すものである。本実施例における共振回路タグ1は対象者のおむつ等の水分(排尿)検知箇所に添着されて使用され、また、共振回路タグ1の周辺領域にはアンテナ50が配置され、更に制御手段であるコントローラ51がアンテナ50に接続されて水分検知装置11が構成される。
そして、共振回路タグ1、アンテナ50間は電磁誘導により非接触、非拘束状態で信号伝達を行う構成としている。
FIG. 5 shows the overall configuration of the moisture detection device 11 according to this embodiment. The resonance circuit tag 1 in this embodiment is used by being attached to a moisture (urination) detection portion such as a diaper of a subject, and an antenna 50 is arranged in a peripheral region of the resonance circuit tag 1 and is a control means. The controller 51 is connected to the antenna 50 to form the moisture detection device 11.
The resonance circuit tag 1 and the antenna 50 are configured to transmit signals in a non-contact and unconstrained state by electromagnetic induction.

前記アンテナ50は共振回路タグ1の共振周波数の如何にもよるが、例えば、共振周波数13.56MHzの場合は、細い銅線等で小型化が可能となるために、フィルム状または線状に構成し、対象者が使用しているベッド等のシーツやマット類等の寝具内に配設されて前記共振回路タグ1の近傍や下部に配置され、おむつに添着された共振回路タグ1の出力信号を検知する。 The antenna 50 depends on the resonance frequency of the resonance circuit tag 1, but for example, in the case of a resonance frequency of 13.56 MHz, it is configured in a film shape or a linear shape so that it can be miniaturized with a thin copper wire or the like. However, the output signal of the resonance circuit tag 1 arranged in the bedding such as beds and mats used by the subject, near or below the resonance circuit tag 1, and attached to the diaper. Is detected.

また、前記コントローラ51は、アンテナ50により検出された共振回路タグ1からの共振状態の遷移をアンテナ50を介して捉え水分(排尿)検知信号を出力する。 Further, the controller 51 captures the transition of the resonance state from the resonance circuit tag 1 detected by the antenna 50 via the antenna 50 and outputs a moisture (urination) detection signal.

図6は、本実施例に係る水分検知装置11の全体構成、動作を示すものである。 FIG. 6 shows the overall configuration and operation of the moisture detection device 11 according to this embodiment.

図6ではコントローラ51に接続したアンテナ50と前記共振回路タグ1とが電磁誘導結合する状態を示している。 FIG. 6 shows a state in which the antenna 50 connected to the controller 51 and the resonance circuit tag 1 are electromagnetically induced and coupled.

前記コントローラ51は、送受信制御部61,符号化部62,複合化部63,発振器64を含み、アンテナ50の発信アンテナ部22aへアンテナ駆動信号を送り込み、共振回路タグ1における水分検知による共振状態の遷移時の出力信号をアンテナ50のアンテナコイルからなる受信アンテナ22bにより受信し対応するアンテナ出力信号を送受信制御部61に伝送し、これに応じて、送受信制御部61に設けた通信手段68により水分検知信号を発信するように構成している。 The controller 51 includes a transmission / reception control unit 61, a coding unit 62, a compounding unit 63, and an oscillator 64, sends an antenna drive signal to the transmitting antenna unit 22a of the antenna 50, and is in a resonance state due to moisture detection in the resonance circuit tag 1. The output signal at the time of transition is received by the receiving antenna 22b composed of the antenna coil of the antenna 50, and the corresponding antenna output signal is transmitted to the transmission / reception control unit 61, and accordingly, the water content is increased by the communication means 68 provided in the transmission / reception control unit 61. It is configured to transmit a detection signal.

前記送受信制御部61は、操作の初期化、共振周波数の制御、水分検知レベルの調整、記録等を行うための制御プログラム、マイクロコンピュータ、メモリー、操作部を備えている。
また、水分検知信号を介護者の携帯やコンピュータへ発信する通信手段68を備えている。
The transmission / reception control unit 61 includes a control program, a microcomputer, a memory, and an operation unit for initializing an operation, controlling a resonance frequency, adjusting a moisture detection level, recording, and the like.
Further, it is provided with a communication means 68 for transmitting a moisture detection signal to the caregiver's mobile phone or computer.

本実施例における水分検知装置11について更に詳述する。 The moisture detection device 11 in this embodiment will be described in more detail.

本実施例における水分検知装置11の操作は、利用者(介護者等)が監視開始すると、発振器64のスイッチ65が入り、発信アンテナ部22aに共振周波数(例えば13.56MHz)を中心周波数として発信する発振器(VCO(Voltage Controlled Oscillator))64より共振周波数からなる駆動信号が発信される。
共振回路タグ1におけるLC共振回路は、共振周波数が発振器64の発信周波数と共振状態となるように設計されている。この状態で共振回路タグ1が水分(排尿)を検知すると、LC共振回路におけるコンデンサ4の表電極4a、裏電極4bは短絡された形となり、共振状態は外れて、非共振状態に急激に遷移する。
In the operation of the moisture detection device 11 in this embodiment, when the user (caregiver or the like) starts monitoring, the switch 65 of the oscillator 64 is turned on, and the oscillator antenna portion 22a transmits the resonance frequency (for example, 13.56 MHz) as the central frequency. A drive signal having a resonance frequency is transmitted from an oscillator (VCO (Voltage Controlled Oscillator)) 64.
The LC resonance circuit in the resonance circuit tag 1 is designed so that the resonance frequency is in resonance with the transmission frequency of the oscillator 64. When the resonance circuit tag 1 detects moisture (urination) in this state, the front electrode 4a and the back electrode 4b of the capacitor 4 in the LC resonance circuit are short-circuited, the resonance state is removed, and the state suddenly shifts to the non-resonance state. do.

この共振周波数の変化に伴うLC共振回路の出力信号を前記受信アンテナ部22bにより検知し、復号化部63を介して送受信制御部61へ送り込む。 The output signal of the LC resonance circuit accompanying the change in the resonance frequency is detected by the receiving antenna unit 22b and sent to the transmission / reception control unit 61 via the decoding unit 63.

送受信制御部61では、前記受信アンテナ部22bからの出力信号が設定されたプログラムによりある一定値を超過すれば、これに即応して水分(排尿)検知信号を音声、光点滅等いずれかのアラート信号として発信する。 In the transmission / reception control unit 61, if the output signal from the reception antenna unit 22b exceeds a certain value by the set program, the moisture (urination) detection signal is immediately alerted to either voice or light blinking. Send as a signal.

この水分(排尿)検知信号は、電話回線等の通信手段68により、更には図示しないネットワーク網により、介護者や関係者へ通知される。 This moisture (urination) detection signal is notified to the caregiver and related persons by a communication means 68 such as a telephone line and further by a network network (not shown).

上述した実施例において、共振回路タグ1はアンテナ50と常に電磁誘導により特定の周波数(例えば13.56MHz)を中心とした電磁誘導結合状態を維持しており、水分が共振回路タグ1で検知されるとコンデンサ4の両電極が短絡され共振状態が外れ非共振状態となる変化をアンテナ50で検知して、送受信制御部61により水分検知信号を発信する構成となっている。 In the above-described embodiment, the resonance circuit tag 1 always maintains an electromagnetic induction coupling state centered on a specific frequency (for example, 13.56 MHz) by electromagnetic induction with the antenna 50, and moisture is detected by the resonance circuit tag 1. Then, both electrodes of the capacitor 4 are short-circuited, the resonance state is released, the change in the non-resonance state is detected by the antenna 50, and the water transmission / reception control unit 61 transmits the moisture detection signal.

このような実施例の構成では、常に共振回路タグ1がアンテナ50と電磁誘導により共振状態を維持していれば、水分検知信号が発信されないが、水分(排尿)がなくても何らかの理由により、例えば利用者がアンテナ50が配設されたベッドや寝具から離床したりした場合でも、共振回路タグ1が非共振状態となり、水分検知信号が誤発信される可能性がある。 In the configuration of such an embodiment, if the resonance circuit tag 1 always maintains the resonance state by the antenna 50 and electromagnetic induction, the moisture detection signal is not transmitted, but even if there is no moisture (urination), for some reason, For example, even when the user leaves the bed or bedding on which the antenna 50 is arranged, the resonance circuit tag 1 may be in a non-resonant state and a moisture detection signal may be erroneously transmitted.

このため、本実施例において、通常は共振タグ1を非共振状態とし、水分検知時点で共振状態に遷移させ、これに対応して水分検知信号を発信する構成とすることも可能である。通常は共振タグ1を非共振状態とし、水分検知時点で共振状態に遷移させるか、また、それとは逆に、通常は共振タグ1を共振状態とし、水分検知時点で非共振状態に遷移させるかは、利用目的や設計仕様に合わせて決定する。 Therefore, in this embodiment, it is also possible to set the resonance tag 1 to a non-resonant state, transition to a resonance state at the time of moisture detection, and transmit a moisture detection signal in response to this. Normally, the resonance tag 1 is set to the non-resonant state and transitions to the resonance state at the time of moisture detection, or conversely, the resonance tag 1 is normally set to the resonance state and transitions to the non-resonance state at the time of moisture detection. Is determined according to the purpose of use and design specifications.

(共振回路タグ1の第1変形例)
図7は、本実施例に係る共振回路タグ1の第1変形例である共振回路タグ70を示すものであり、図1に示す共振回路タグ1の場合と同一の要素には同一の符号を付して示す。
(First modification of resonant circuit tag 1)
FIG. 7 shows a resonance circuit tag 70 which is a first modification of the resonance circuit tag 1 according to the present embodiment, and the same reference numerals are given to the same elements as in the case of the resonance circuit tag 1 shown in FIG. Shown with.

図7に示す共振回路タグ70は、図1に示す共振回路タグ1におけるLC接合点部5における貫通孔5aに代えて、又はそれに追加して基板2に複数の貫通孔71又は複数の貫通孔72を設けたことが特徴である。 The resonance circuit tag 70 shown in FIG. 7 replaces or additionally has a plurality of through holes 71 or a plurality of through holes in the substrate 2 in place of or in addition to the through holes 5a in the LC junction 5 in the resonance circuit tag 1 shown in FIG. The feature is that 72 is provided.

前記貫通孔71は、コイル3で囲まれる内部領域に複数の貫通孔71を前記基板2を貫通してこの基板2の表面から裏面にかけて水分が誘導されるように設けている。 The through hole 71 is provided with a plurality of through holes 71 in an internal region surrounded by the coil 3 so as to penetrate the substrate 2 and induce moisture from the front surface to the back surface of the substrate 2.

勿論、この場合コイル3の上部に存在する絶縁層25は各貫通孔71を覆うことなく水分を各貫通孔71へ誘導するようにしている。 Of course, in this case, the insulating layer 25 existing on the upper part of the coil 3 guides moisture to each through hole 71 without covering each through hole 71.

また、前記各貫通孔72は、コンデンサ4の近傍に設けられて水分がコンデンサ4の表電極4a側から裏電極4b側へ誘導されるよう構成している。 Further, each of the through holes 72 is provided in the vicinity of the capacitor 4 so that moisture is guided from the front electrode 4a side of the capacitor 4 to the back electrode 4b side.

これらの各貫通孔71、72は、LC接合点部5の貫通孔5aと同じく0.1mmから0.5mm程度の穴を形成しているが、形状はいずれの形状でもかまわない。 Each of these through holes 71 and 72 forms a hole of about 0.1 mm to 0.5 mm like the through hole 5a of the LC joint point portion 5, but the shape may be any shape.

これら各貫通孔71、72が微小な大きさであるため前述した通り水分の表面張力により水分が表面から裏面へ浸透しないため、これらの各貫通孔71,72の表面及び裏面に吸水材21a及びおむつ側の吸水材24が添着され水分を誘導することが肝要となる。 Since each of the through holes 71 and 72 has a minute size, the water does not permeate from the front surface to the back surface due to the surface tension of the moisture as described above. It is important that the water absorbing material 24 on the diaper side is attached to induce moisture.

前記LC接合点部5に貫通孔5aを設ける場合は、前記コイル3の他端部とコンデンサ4の裏電極4aとを電気的に接続することと、貫通孔5aを形成することの両方の機能を備えることが必要となるが、LC接合点部5以外にも各貫通孔71又は72を設ける場合は、水分を誘導する機能のみが達成できれば、各貫通孔71又は72の穴の数、大きさ、形状等に制限はない。 When the through hole 5a is provided in the LC junction 5, both the functions of electrically connecting the other end of the coil 3 and the back electrode 4a of the capacitor 4 and forming the through hole 5a are functions. However, when each through hole 71 or 72 is provided in addition to the LC junction portion 5, the number and size of the holes in each through hole 71 or 72 can be achieved if only the function of inducing water can be achieved. There are no restrictions on the shape or the like.

第1変形例である共振回路タグ70では、LC接合点部5に貫通孔5aを設け、更に追加的に別の場所に各貫通孔71、72を設けているが、LC接合点部5に貫通孔5aを設けずに、別の場所に各貫通孔71、72だけを設けることでも前記コイル3の他端部と裏電極4bとを電気的に接続さえしておけば既述した実施例の場合と同様な作用、効果を発揮させることができる。 In the resonance circuit tag 70 which is the first modification, the through holes 5a are provided in the LC junction portion 5, and the through holes 71 and 72 are additionally provided in different places, but the LC junction portion 5 is provided with the through holes 71 and 72. In the above-described embodiment, even if only the through holes 71 and 72 are provided in different places without providing the through holes 5a, the other end of the coil 3 and the back electrode 4b are electrically connected as long as they are electrically connected. It is possible to exert the same action and effect as in the case of.

(共振回路タグ1の第2変形例)
前記共振回路タグ1の第2変形例である共振回路タグ80について図8、図9を参照して説明する。
(Second modification of resonant circuit tag 1)
The resonance circuit tag 80, which is a second modification of the resonance circuit tag 1, will be described with reference to FIGS. 8 and 9.

なお、図1、図7に示す共振回路タグ1、70の場合と同一の要素には同一の符号を付して示す。 The same elements as those of the resonance circuit tags 1 and 70 shown in FIGS. 1 and 7 are designated by the same reference numerals.

前記共振回路タグ80が通常は非共振状態を維持し、水分(排尿)を検知した際にコンデンサ4の表電極4a、裏電極4bを短絡させることにより共振状態とするには、その一例として、水分検知により短絡されるコンデンサ4に加えて、図8に示し、図9に等価的に示すように、追加的にコンデンサ4Aをこの共振回路タグ80の一部、例えばコイル3により囲まれる領域に付設し、コイル3とコンデンサ4AとでLC共振回路を形成する構成とする。 As an example, when the resonance circuit tag 80 normally maintains a non-resonant state and short-circuits the front electrode 4a and the back electrode 4b of the capacitor 4 when moisture (urination) is detected, the resonance circuit tag 80 is brought into a resonance state. In addition to the capacitor 4 short-circuited by moisture detection, as shown in FIG. 8 and equivalently shown in FIG. 9, an additional capacitor 4A is additionally placed in a part of the resonant circuit tag 80, for example, in a region surrounded by the coil 3. Attached, the LC resonance circuit is formed by the coil 3 and the capacitor 4A.

なお、この場合には、前記コイル3の他端部をコンデンサ4Aの表電極4cに、コンデンサ4Aの裏電極4dを前記コンデンサ4の裏電極4bに各々電気的に接続する。 In this case, the other end of the coil 3 is electrically connected to the front electrode 4c of the capacitor 4A, and the back electrode 4d of the capacitor 4A is electrically connected to the back electrode 4b of the capacitor 4.

更に詳述すると、図8、図9において、水分のない通常状態では、コイル3とコンデンサ4及び4Aとがアンテナ50との間で非共振状態を維持しており、水分(排尿)が共振回路タグ80により検知されるとコンデンサ4が短絡されて、実質的にコイル3とコンデンサ4AとでLC共振回路を形成する。 More specifically, in FIGS. 8 and 9, in a normal state without water content, the coil 3 and the capacitors 4 and 4A maintain a non-resonant state between the antenna 50 and the water content (urine) is a resonance circuit. When detected by the tag 80, the capacitor 4 is short-circuited, and the coil 3 and the capacitor 4A substantially form an LC resonance circuit.

つまり、このコイル3とコンデンサ4Aとで形成されるLC共振回路の出力信号をアンテナ50により検知することで、通常では非共振状態であるが水分検知時のみ共振状態であることを検知することが可能となる。 That is, by detecting the output signal of the LC resonance circuit formed by the coil 3 and the capacitor 4A by the antenna 50, it is possible to detect that the state is normally non-resonant but only at the time of moisture detection. It will be possible.

このように共振回路タグ80が通常は非共振状態で、水分検知時に共振状態に遷移するように構成するためには、前記コンデンサ4及び4Aからなる2個のコンデンサを基板2上に構成することで、コンデンサ4が水分により短絡されていない状態では、タグ80におけるキャパシタンス容量はコンデンサ4および4Aにより形成される状態を非共振状態に設定し、コンデンサ4が短絡され4Aのみで形成される状態を共振状態にすることができる。
図8においては、コンデンサを2個形成することでタグ80を非共振状態にする一例を示したが、コンデンサは複数個形成しても良い。
複数のコンデンサを形成することで、タグを通常非共振状態に保ち、水分検知によりいずれかのコンデンサを短絡させることで、タグを共振状態にして水分検知を行うことも可能である。
また、上記実施例では、タグ80が通常非共振状態から水分検知により共振状態へ遷移する例を示したが、複数のコンデンサによりタグ80が通常共振状態を形成し、水分検知により非共振状態と遷移させて水分検知を行うことも可能である。
In this way, in order to configure the resonance circuit tag 80 to transition to the resonance state when moisture is detected, which is normally in the non-resonance state, two capacitors composed of the capacitors 4 and 4A are configured on the substrate 2. In the state where the capacitor 4 is not short-circuited by water, the capacitance capacity in the tag 80 sets the state formed by the capacitors 4 and 4A to the non-resonant state, and the state in which the capacitor 4 is short-circuited and formed only by 4A. It can be in a resonance state.
In FIG. 8, an example is shown in which the tag 80 is brought into a non-resonant state by forming two capacitors, but a plurality of capacitors may be formed.
By forming a plurality of capacitors, the tag is normally kept in a non-resonant state, and by short-circuiting one of the capacitors by moisture detection, it is possible to put the tag in a resonant state and perform moisture detection.
Further, in the above embodiment, the example in which the tag 80 transitions from the normal non-resonant state to the resonance state by moisture detection is shown, but the tag 80 forms a normal resonance state by a plurality of capacitors and becomes a non-resonant state by moisture detection. It is also possible to make a transition and detect moisture.

図8は、これらを実現するために基板2上に2個のコンデンサ4及び4Aをパターンとして形成した例を示している。 FIG. 8 shows an example in which two capacitors 4 and 4A are formed as a pattern on the substrate 2 in order to realize these.

図8において、基板2の表面側にはコイル3、コンデンサ4の表電極4a、及びコンデンサ4Aの表電極4cがエッチング等の処理により薄膜成形されており、コイル3の一端部はコンデンサ4の表電極4aに接続され、コイル3の他端部はコンデンサ4Aの表電極4cに接続されてパターンを形成している。 In FIG. 8, the coil 3, the surface electrode 4a of the capacitor 4, and the surface electrode 4c of the capacitor 4A are thinly formed on the surface side of the substrate 2 by a process such as etching, and one end of the coil 3 is the front surface of the capacitor 4. It is connected to the electrode 4a, and the other end of the coil 3 is connected to the surface electrode 4c of the capacitor 4A to form a pattern.

また、前記基板2の裏面側には、前記表電極4a、表電極4cに基板2を挟んで各々対向する位置にコンデンサ4の裏電極4b及びコンデンサ4Aの裏電極4dがそれぞれパターンにて形成している。
そして、それぞれの裏電極4b及び4dは電気的に接続されてパターンを形成している。
Further, on the back surface side of the substrate 2, the back electrode 4b of the capacitor 4 and the back electrode 4d of the capacitor 4A are formed in a pattern at positions facing each other with the substrate 2 sandwiched between the front electrode 4a and the front electrode 4c. ing.
The back electrodes 4b and 4d are electrically connected to form a pattern.

また、共振回路タグ80のコイル3及びコンデンサ4Aの表電極4cは水分により誘導性リアクタンス及びキャパシタンスが変化しないようにこれらコイル3及びコンデンサ4aの表電極4cを覆うように絶縁層(水分調整層)81が施されており、更に基板2の裏面にもコンデンサ4Aの裏電極4dを覆うように絶縁層(水分調整層)が施されている。したがって、水分(排尿)は共振回路タグ80のコンデンサ4の部分のみに誘導される。 Further, the coil 3 of the resonance circuit tag 80 and the surface electrode 4c of the capacitor 4A have an insulating layer (moisture adjusting layer) so as to cover the surface electrode 4c of the coil 3 and the capacitor 4a so that the inductive reactance and the capacitance do not change due to moisture. 81 is provided, and an insulating layer (moisture adjusting layer) is also provided on the back surface of the substrate 2 so as to cover the back electrode 4d of the capacitor 4A. Therefore, water (urination) is induced only in the portion of the capacitor 4 of the resonant circuit tag 80.

前記コンデンサ4の近傍には貫通孔72が設けられており、コンデンサ4へ水分(排尿)が誘導されるとその水分(排尿)は前記貫通孔72を経てこのコンデンサ4の表電極4aから裏電極4bへと浸水し前記表電極4a、裏電極4b間を短絡し、従って、コンデンサ4が短絡された状態となる。 A through hole 72 is provided in the vicinity of the capacitor 4, and when water (urine) is induced in the capacitor 4, the water (urine) passes through the through hole 72 from the front electrode 4a of the capacitor 4 to the back electrode. The water enters 4b and short-circuits between the front electrode 4a and the back electrode 4b, so that the capacitor 4 is short-circuited.

これにより、前記共振回路タグ80は、コイル3とコンデンサ4AとでLC共振回路を形成する。 As a result, the resonant circuit tag 80 forms an LC resonant circuit with the coil 3 and the capacitor 4A.

この時の共振周波数を特定周波数(例えば13.56MHz)に設定しておけば、アンテナ50で前記共振回路タグ80の共振状態への遷移を検知し、この結果、水分(排尿)検知信号を取り出すことが可能となる。 If the resonance frequency at this time is set to a specific frequency (for example, 13.56 MHz), the antenna 50 detects the transition of the resonance circuit tag 80 to the resonance state, and as a result, the moisture (urination) detection signal is taken out. It becomes possible.

(共振回路タグ1の第3変形例)
前記共振回路タグ1の第3変形例である共振回路タグ90について図10を参照して説明する。
(Third modification example of resonance circuit tag 1)
The resonance circuit tag 90, which is a third modification of the resonance circuit tag 1, will be described with reference to FIG.

なお、図1に示す共振回路タグ1、図8に示す共振回路タグ80の場合と同一の要素には同一の符号を付して示す。 The same elements as in the case of the resonance circuit tag 1 shown in FIG. 1 and the resonance circuit tag 80 shown in FIG. 8 are designated by the same reference numerals.

図10に示す第3変形例である共振回路タグ90は、図1に示す共振回路タグ1、図8に示す共振回路タグ80の改良版であり、前記基板2の上に形成されたコンデンサ4の表電極4aに替えて分離配置の2個の表電極4a1、4a2で構成したこと、及び、同じく基板2の上に形成されたコンデンサ4Aの表電極4cに替えて分離配置の2個の表電極4c1、4c2で構成したこと主な特徴である。 The resonance circuit tag 90, which is a third modification shown in FIG. 10, is an improved version of the resonance circuit tag 1 shown in FIG. 1 and the resonance circuit tag 80 shown in FIG. 8, and is a capacitor 4 formed on the substrate 2. The two table electrodes 4a1 and 4a2 are separated from each other in place of the table electrode 4a in the above, and the two tables are separated from each other in place of the table electrode 4c of the capacitor 4A also formed on the substrate 2. The main feature is that it is composed of electrodes 4c1 and 4c2.

図10において、前記共振回路タグ90の基板2上にはコイル3、コンデンサ4の表電極4a1、4a2、及び、コンデンサ4Aの表電極4c1、4c2を形成している。 In FIG. 10, the coil 3, the table electrodes 4a1 and 4a2 of the capacitor 4, and the table electrodes 4c1 and 4c2 of the capacitor 4A are formed on the substrate 2 of the resonance circuit tag 90.

前記コイル3の一端部は、コンデンサ4の表電極4a2に接続し、コイル3の他端部は、コンデンサ4Aの表電極4c1にそれぞれ接続している。 One end of the coil 3 is connected to the front electrode 4a2 of the capacitor 4, and the other end of the coil 3 is connected to the front electrode 4c1 of the capacitor 4A.

前記基板2の裏面においては、コンデンサ4の表電極4a1、4a2に対向する箇所に当該コンデンサ4の裏電極4bを、また、コンデンサ4Aの表電極4c1、4c2に対向する箇所に当該コンデンサ4Aの裏電極4dを形成している。 On the back surface of the substrate 2, the back electrode 4b of the capacitor 4 is placed at a position facing the front electrodes 4a1 and 4a2 of the capacitor 4, and the back electrode 4A of the capacitor 4A is placed at a position facing the front electrodes 4c1 and 4c2 of the capacitor 4A. The electrode 4d is formed.

前記コンデンサ4の裏電極4bは、コンデンサ4Aの裏電極4dと前記基板2の裏側で接続している。 The back electrode 4b of the capacitor 4 is connected to the back electrode 4d of the capacitor 4A on the back side of the substrate 2.

すなわち、前記コンデンサ4の表電極は、隣接する2個の表電極4a1、4a2で構成し、また、前記コンデンサ4Aの表電極は、隣接する2つの表電極4c1、4c2で構成している。 That is, the table electrode of the capacitor 4 is composed of two adjacent table electrodes 4a1 and 4a2, and the table electrode of the capacitor 4A is composed of two adjacent table electrodes 4c1 and 4c2.

前記表電極4a1、4a2、前記表電極4c1、4c2は、それぞれ互いに隣接はしているが電気的には離間している。 The surface electrodes 4a1 and 4a2 and the surface electrodes 4c1 and 4c2 are adjacent to each other but electrically separated from each other.

この図10に示す共振回路タグ90においては、コンデンサ4及びコンデンサ4Aの両方の表電極を各々2個構成としているが、いずれか一方のみを複数の電極で構成しても良いし、複数の電極は3つ以上の更に多数の電極で構成しても良い。 In the resonance circuit tag 90 shown in FIG. 10, both the capacitor 4 and the capacitor 4A have two table electrodes, but only one of them may be composed of a plurality of electrodes or a plurality of electrodes. May be composed of three or more more electrodes.

また、各々のコンデンサ4及び4Aの表面には絶縁層(水分調整層)を形成しておらず水分が直接誘導されるような構成となっている。 Further, the surface of each of the capacitors 4 and 4A is not formed with an insulating layer (moisture adjusting layer), and the structure is such that moisture is directly induced.

第3変形例である共振回路タグ90において、通常状態(非浸水状態)にある場合は、前記コンデンサ4は、表電極4a2と裏電極4bとの間で基板2を挟んで容量性リアクタンスを形成し、また、前記コンデンサ4Aは、表電極4c1と裏電極4dとの間で基板2を挟んで容量性リアクタンスを形成している。 In the resonance circuit tag 90, which is a third modification, when the capacitor 4 is in a normal state (non-flooded state), the capacitor 4 forms a capacitive reactance with the substrate 2 sandwiched between the front electrode 4a2 and the back electrode 4b. Further, the capacitor 4A forms a capacitive reactance with the substrate 2 sandwiched between the front electrode 4c1 and the back electrode 4d.

そして、一旦水分が共振回路タグ90の表面上へ浸水すると、前記コンデンサ4の表電極4a1、4a2は水分により短絡され、また、前記コンデンサ4Aの表電極4c1、4c2は水分により短絡される。 Then, once the water is flooded onto the surface of the resonant circuit tag 90, the surface electrodes 4a1 and 4a2 of the capacitor 4 are short-circuited by the water, and the surface electrodes 4c1 and 4c2 of the capacitor 4A are short-circuited by the water.

これにより、コンデンサ4の容量リアクタンスは表電極4a1及び4a2と裏電極4bとの間で定まり、また、コンデンサ4Aの容量リアクタンスは表電極4c1及び4c2と裏電極4dとの間で定まる。 As a result, the capacitive reactance of the capacitor 4 is determined between the front electrodes 4a1 and 4a2 and the back electrode 4b, and the capacitive reactance of the capacitor 4A is determined between the front electrodes 4c1 and 4c2 and the back electrode 4d.

すなわち、共振回路タグ90における通常状態と水分浸水状態とで容量リアクタンスは実質的に変化することになる。 That is, the capacitive reactance of the resonant circuit tag 90 changes substantially between the normal state and the water inundation state.

このように共振回路タグ90を構成することにより、特に基板2に対して貫通孔を形成しなくても共振回路タグ90の表面における表電極の面積変化を利用した容量リアクタンスの変動によって、共振回路タグ90における共振状態、非共振状態の遷移を実現し既述した場合と同様にして水分検知信号を得ることが可能となる。 By configuring the resonance circuit tag 90 in this way, even if a through hole is not formed with respect to the substrate 2, the resonance circuit is caused by the fluctuation of the capacitive reactor using the change in the area of the table electrode on the surface of the resonance circuit tag 90. It is possible to realize the transition between the resonance state and the non-resonance state in the tag 90 and obtain the moisture detection signal in the same manner as described above.

上述した本実施例においては、主としておむつ等の排尿検知を行う場合を例として説明したが、水分に限らず共振回路タグ90の浮遊静電容量やリアクタンスを変化させるような、排尿、油等の各種液体、その他の液体を含む流体の検知にも適用できるものである。 In the above-described embodiment, the case of detecting urination of a diaper or the like is mainly described as an example, but urination, oil, etc. that change the floating capacitance or reactance of the resonance circuit tag 90, not limited to water content, are described. It can also be applied to the detection of various liquids and fluids including other liquids.

従って、本発明は、上記実施例の態様そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化したり、上記実施例に開示されている複数の構成要素を適宜組み合わせたりすることにより種々の発明を完成できる。 Therefore, the present invention is not limited to the embodiment of the above embodiment as it is, and at the implementation stage, the components may be modified and embodied within a range not deviating from the gist thereof, or a plurality of components disclosed in the above embodiment may be disclosed. Various inventions can be completed by appropriately combining the components.

例えば、実施例に示される全構成要素から幾つかの構成要素を削除しても良い。更に、異なる実施の態様に亘る構成要素を適宜組み合わせても良い。 For example, some components may be removed from all the components shown in the examples. In addition, components from different embodiments may be combined as appropriate.

本発明に係る水分検知装置及び水分検知用の共振回路タグは、主として介護用及び病人用おむつへ適用することで素早く、確実に排尿を検知することができ、各種病院、医院等の医療施設や、各種介護施設等におけるおむつ装用者に関する水分検知システムとして広範に適用可能である。 The moisture detection device and the resonance circuit tag for moisture detection according to the present invention can detect urination quickly and surely by being applied mainly to diapers for long-term care and sick people, and can be used in medical facilities such as various hospitals and clinics. , Can be widely applied as a moisture detection system for diaper wearers in various nursing care facilities.

また、水分検知用共振回路タグは、小型、軽量で薄膜シート状に形成することが出来るため点滴漏れ検知、自動車、飛行機等の液体漏れ検知等の水分検知用として広く応用ができるものである。 Further, since the resonance circuit tag for moisture detection can be formed in the form of a thin film sheet with a small size and light weight, it can be widely applied for moisture detection such as drip leakage detection and liquid leakage detection of automobiles and airplanes.

1 水分検知用の共振回路タグ
2 基板
3 コイル
4 コンデンサ
4A コンデンサ
4a 表電極
4a1 表電極
4a2 表電極
4b 裏電極
4c 表電極
4c1 表電極
4c2 表電極
4d 裏電極
5 LC接合点部
5a 貫通孔
11 水分検知装置
21 不織布
21a 吸水材
22a 送信アンテナ部
22b 受信アンテナ部
23a 接着層
23b 接着層
24 吸水材(おむつ側の表面材)
25 絶縁層(水分調整層)
40 水分
50 アンテナ
51 コントローラ
61 送受信制御部
62 符号化部
63 復号化部
64 発振器
65 スイッチ
68 通信手段
70 共振回路タグ
71 貫通孔
72 貫通孔
80 共振回路タグ
81 絶縁層
90 共振回路タグ
1 Resonant circuit tag for moisture detection 2 Substrate 3 Coil 4 Capacitor 4A Capacitor 4a Table electrode 4a1 Table electrode 4a2 Table electrode 4b Back electrode 4c Table electrode 4c1 Table electrode 4c2 Table electrode 4d Back electrode 5 LC junction 5a Through hole 11 Moisture Detection device 21 Non-woven electrode 21a Water absorbing material 22a Transmitting antenna part 22b Receiving antenna part 23a Adhesive layer 23b Adhesive layer 24 Water absorbing material (surface material on the diaper side)
25 Insulation layer (moisture control layer)
40 Moisture 50 Antenna 51 Controller 61 Transmission / reception control unit 62 Coding unit 63 Decoding unit 64 Oscillator 65 Switch 68 Communication means 70 Resonance circuit tag 71 Through hole 72 Through hole 80 Resonance circuit tag 81 Insulation layer 90 Resonance circuit tag

Claims (3)

誘電体を表電極、裏電極で挟持して構成されたコンデンサと、該コンデンサの表電極、裏電極と接続された矩形巻回パターン状のコイルとを具備し、前記コンデンサ、コイルの共振状態又は非共振状態の出力信号又は水分浸入に伴う前記コンデンサの表電極、裏電極の短絡に伴うキャパシタンス変化による共振状態、非共振状態の遷移時に対応した出力信号を出力する共振回路タグと、
前記矩形巻回パターン状のコイルの上部を覆う薄膜絶縁材で形成した水分を一定期間保持する水分調整層である絶縁層と、
前記共振回路タグのコイルと電磁誘導により結合し、前記共振回路タグからの出力信号に対応したアンテナ出力信号を送出するアンテナコイルを具備するアンテナと、
前記共振回路タグの共振状態、非共振状態の遷移時に対応した前記アンテナからのアンテナ出力信号に応じて水分検知信号を出力する制御手段と、
を有することを特徴とする水分検知装置。
A capacitor configured by sandwiching a dielectric material between a front electrode and a back electrode, and a rectangular winding pattern coil connected to the front electrode and the back electrode of the capacitor are provided, and the capacitor, the resonance state of the coil, or the resonance state of the capacitor is provided. A resonance circuit tag that outputs an output signal in a non-resonant state or an output signal corresponding to a transition in a non-resonant state, a resonance state due to a capacitance change due to a short circuit between the front electrode and the back electrode of the capacitor due to water infiltration, and a resonance circuit tag.
An insulating layer that is a moisture adjusting layer that retains moisture formed by a thin film insulating material that covers the upper part of the rectangular winding pattern coil for a certain period of time.
An antenna provided with an antenna coil that is coupled to the coil of the resonance circuit tag by electromagnetic induction and sends out an antenna output signal corresponding to the output signal from the resonance circuit tag.
A control means for outputting a moisture detection signal according to the antenna output signal from the antenna corresponding to the transition between the resonance state and the non-resonance state of the resonance circuit tag.
A moisture detection device characterized by having.
誘電体を表電極、裏電極で挟持して構成されたコンデンサと、該コンデンサの表電極、裏電極と接続されたコイルとを具備し、前記コンデンサ、コイルの共振状態又は非共振状態の出力信号又は水分浸入に伴う前記コンデンサの表電極、裏電極の短絡に伴うキャパシタンス変化による共振状態、非共振状態の遷移時に対応した出力信号を出力する水分検知用の共振回路タグであって、A capacitor configured by sandwiching a dielectric between a front electrode and a back electrode, and a coil connected to the front electrode and the back electrode of the capacitor are provided, and an output signal in a resonant state or a non-resonant state of the capacitor and the coil is provided. Alternatively, it is a resonance circuit tag for moisture detection that outputs an output signal corresponding to the transition of the resonance state and the non-resonance state due to the capacitance change due to the short circuit of the front electrode and the back electrode of the capacitor due to the infiltration of water.
前記コンデンサの表電極は、複数の表電極により構成され、水分が前記コンデンサの複数の表電極を短絡することで前記コンデンサのキャパシタンスを実質的に変化させて共振回路タグの共振状態、非共振状態の遷移を行うことを特徴とする水分検知用の共振回路タグ。The front electrode of the capacitor is composed of a plurality of front electrodes, and moisture short-circuits the plurality of front electrodes of the capacitor to substantially change the capacitance of the capacitor, so that the resonance state and the non-resonance state of the resonance circuit tag are substantially changed. Resonance circuit tag for moisture detection, which is characterized by performing the transition of.
誘電体を表電極、裏電極で挟持して構成されたコンデンサと、該コンデンサの表電極、裏電極と接続されたコイルとを具備し、前記コンデンサ、コイルの共振状態又は非共振状態の出力信号又は水分浸入に伴う前記コンデンサの表電極、裏電極の短絡に伴うキャパシタンス変化による共振状態、非共振状態の遷移時に対応した出力信号を出力する水分検知用の共振回路タグであって、A capacitor configured by sandwiching a dielectric between a front electrode and a back electrode, and a coil connected to the front electrode and the back electrode of the capacitor are provided, and an output signal in a resonant state or a non-resonant state of the capacitor and the coil is provided. Alternatively, it is a resonance circuit tag for moisture detection that outputs an output signal corresponding to the transition of the resonance state and the non-resonance state due to the capacitance change due to the short circuit of the front electrode and the back electrode of the capacitor due to the infiltration of water.
前記コイルの一端部を前記コンデンサの表電極に接続し、前記コイルの他端部には前記コンデンサの裏電極に接続するための導電材を用いた貫通孔部が設けられ、前記貫通孔部分で前記コイルの他端部と前記コンデンサの裏電極とを電気的に接続するとともに、水分が浸水されると前記貫通孔を介して当該水分が裏電極に達し、前記コンデンサの表電極と裏電極とを短絡状態にして前記コンデンサのキャパシタンスを実質的に変化させて共振状態、非共振状態の遷移を行うことを特徴とする水分検知用の共振回路タグ。One end of the coil is connected to the front electrode of the capacitor, and the other end of the coil is provided with a through hole portion using a conductive material for connecting to the back electrode of the capacitor. The other end of the coil is electrically connected to the back electrode of the capacitor, and when water is infiltrated, the water reaches the back electrode through the through hole, and the front electrode and the back electrode of the capacitor are connected. A resonance circuit tag for moisture detection, characterized in that the capacitance of the capacitor is substantially changed in a short-circuit state to perform a transition between a resonance state and a non-resonance state.
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