JP2006234716A - Sheet-like sensor device - Google Patents

Sheet-like sensor device Download PDF

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JP2006234716A
JP2006234716A JP2005052727A JP2005052727A JP2006234716A JP 2006234716 A JP2006234716 A JP 2006234716A JP 2005052727 A JP2005052727 A JP 2005052727A JP 2005052727 A JP2005052727 A JP 2005052727A JP 2006234716 A JP2006234716 A JP 2006234716A
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sensor
region
weft
sheet
lateral
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Tatsuji Ikeguchi
Koichi Ota
幸一 太田
達治 池口
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Aichi Prefecture
愛知県
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Abstract

PROBLEM TO BE SOLVED: To provide a sheet-like sensor that can measure pressure change on an un-uniform face and has high resolution of load distribution even at a low cost.
SOLUTION: This sheet-like sensor device has a sensor body formed of cloth including warps and wefts made of conductive fiber and non-conductive material for covering the surroundings of conductive fiber. The sensor body has a first voltage applying means for applying voltage to the warps included in a first longitudinal region in the longitudinal direction and the wefts included in a first lateral region in the lateral direction, and a first means for detecting variation in electrostatic capacity in an intersection section of the longitudinal region and the first lateral region.
COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明はシート状センサ装置に関する。 This invention relates to a sheet-like sensor unit.

従来は、不均一な面における圧力変化を測定する方法として、織物や編物等をシート状にして、それにセンサ機能を持たせることで圧力変化の測定を可能としていた。 Conventionally, as a method of measuring the pressure change in the uneven surface, the woven or knitted fabric or the like into a sheet, it was possible to measure the pressure changes by giving the sensor function. 特許文献1は、上下2枚のシート素地に感圧センサを組込み、荷重による抵抗値の変化を測定することにより圧力変化を測定している。 Patent Document 1 incorporates a pressure sensor in the upper and lower sheets green body, measures the pressure changes by measuring the changes in resistance due to load.
しかし、荷重分布の分解能が感圧センサの個数に依存するため、分解能を上げるためには感圧センサを増やさざるを得ず、コストがかかるという問題が生じる。 However, since the resolution of the load distribution is dependent on the number of the pressure-sensitive sensor, in order to increase the resolution inevitably increase the pressure sensor, the cost it takes arises.
特開2004−132765 Patent 2004-132765

そこで、従来のように不均一な面における圧力変化を測定でき、かつ、低コストでも荷重分布の分解能の良いシート状センサを提供する。 Therefore, as in the prior art can measure the pressure change in the uneven surface, and also provides a sheet-like sensor good resolution of the load distribution at a low cost.

本発明は上記課題を解決すべくなされたものである。 The present invention has been made to solve the above problems. すなわち、 That is,
導電性繊維と該導電性繊維の周囲を被覆する非導電性材料とからなるたて糸及びよこ糸を含む織物からなるセンサ本体、前記センサ本体において、縦方向の第1の縦領域に含まれる前記たて糸と横方向の第1の横領域に含まれる前記よこ糸とに電圧を印加する第1の電圧印加手段、及び前記第1の縦領域と第1の横領域との交差部分の静電容量の変化を検出する第1の手段、を備えてなるシート状センサ装置である。 Conductive fibers and conductive fibers sensor body comprising a fabric comprising warp and weft consisting of a non-conductive material covering the external surface of the said sensor body, said warp yarns included in the vertical first longitudinal region and first voltage applying means for applying a voltage to said weft contained in the first lateral region of the lateral, and the change in capacitance intersection between the first vertical region and the first lateral region first means for detecting a sheet-like sensor device including a.

上記構成により、センサ本体は、たて糸及びよこ糸を織物とすることで形成される。 With the above structure, the sensor body is formed by the warp and weft and woven. そのため、たて糸及びよこ糸は交差部分が生じる。 Therefore, the warp and weft occurs intersection. すなわち、たて糸の芯部とよこ糸の芯部との間に絶縁体(非導電性材料)が存在するコンデンサが形成される。 That is, the capacitor insulator (nonconductive material) is present between the core portion of the core and weft of the warp is formed. この状態で交差部分を加圧すると、たて糸とよこ糸との間に形成されるコンデンサの静電容量が増加する。 When pressurizing the intersection in this state, the capacitance of the capacitor formed between the warp and weft increases. この静電容量の変化を測定することで交差部分での圧力変化を測定することが可能となる。 It becomes possible to measure pressure changes in the intersection by measuring the change in capacitance.
また、交差部分へ物体が近づいたり、軽く触れる(圧力なし)ことにより交差部分の電界に乱れが生じたときにも静電容量が変化する。 Also, or approaching object to intersection, (no pressure) lightly touches that disturbance to an electric field intersections capacitance changes even when caused by. よって、交差部分での近接センサ若しくはタッチセンサとして使用することも可能である。 Therefore, it is also possible to use as a proximity sensor or a touch sensor in the intersection.
センサの分解能は縦領域又は横領域の面積に応じて簡単に調整できることになる。 Resolution of the sensor will be easily adjusted according to the area of ​​the vertical area or lateral area. また、たて糸、よこ糸が安価な導電性繊維の周囲を非導電性材料で被覆するだけで形成できるため、コストを上げることなく分解能の良いセンサを作成できる。 Moreover, warp, because the weft can be formed simply by covering the periphery of inexpensive conductive fibers of a non-conductive material, can create a good sensor resolution without increasing the cost.

以下、この発明の要素について説明する。 The following describes the elements of the present invention.
(導電性繊維、非導電性材料) (Conductive fibers, non-conductive material)
導電性繊維は、たて糸又はよこ糸の芯部に位置し、導電性繊維の周囲を非導電性材料で被覆する(図1A参照)。 Conductive fibers, located in the core of the warp or weft, to cover the periphery of the conductive fibers in a non-conductive material (see FIG. 1A). 導電性繊維の周囲を非導電性材料で被覆する方法は、導電性繊維の周囲に非導電性材料をらせん状に巻きつける方法の他、導電性繊維を中心部に配置しその周囲に非導電性材料が配置されるよう紡績又は紡糸する方法がある。 Method of coating the periphery of the conductive fibers of a non-conductive material, non-conductive and non-conductive material around the conductive fiber other methods winding spirally arranged conductive fibers in the center to the periphery there is a method of spinning or spinning to sexual material is placed.
導電性繊維の材質としては、ステンレスやカーボンなどを使用することができる。 The material of the conductive fibers can be used such as stainless steel or carbon. また、非導電性材料の材質としては、綿やポリエステルなどを使用することができる。 The material of the non-conductive material can be used such as cotton or polyester.
シート状センサは、たて糸及びよこ糸を織物とすることで形成される。 Sheet sensor is formed by the warp and weft and woven. そのため、たて糸及びよこ糸は交差部分が生じる(図1B参照)。 Therefore, the warp and weft occurs intersection (see FIG. 1B). すなわち、たて糸の芯部とよこ糸の芯部との間に絶縁体(非導電性材料)が存在するコンデンサを形成する。 That is, to form a capacitor dielectric (nonconductive material) is present between the core portion of the core and weft warp.
上記の状態で交差部分を加圧すると、各導電性繊維の間隔が短くなるため、たて糸とよこ糸との間に形成されるコンデンサの静電容量が増加する。 When pressurizing the intersection in the above state, the interval between the conductive fibers is shortened, the electrostatic capacitance of the capacitor formed between the warp and weft increases. この静電容量の変化を測定することで交差部分での圧力変化を測定することが可能である。 It is possible to measure pressure changes in the intersection by measuring the change in capacitance.

(静電容量の変化を検出する手段) (It means for detecting a change in capacitance)
静電容量の変化を検出し、圧力分布を測定するための測定装置12は、静電容量を測定するためのLCRメータ13、LCRメータ13で得られた静電容量から圧力を導き出す静電容量−圧力変換部及びシート状センサの静電容量を測定するタイミングを調整するタイミング調整部14から構成される(図2参照)。 Detecting a change in capacitance, measuring device 12 for measuring the pressure distribution, the capacitance deriving the pressure from the LCR meter 13, the capacitance obtained by the LCR meter 13 for measuring the capacitance - it consists of the timing adjusting unit 14 to adjust the timing of measuring the capacitance of the pressure converter unit and the sheet-like sensor (see Figure 2).

静電容量の測定方法は特に限定されないが、例えば、LCRメータを用いて測定することができる。 Method of measuring capacitance is not particularly limited, for example, can be measured using an LCR meter. たて糸とよこ糸との交差部分で形成されるコンデンサに交流電流を流し、次にコンデンサの交流電圧を測定する。 The capacitor formed at the intersection of the warp and weft an alternating current flows, then measures the AC voltage of the capacitor. 交流電流と交流電圧とは静電容量に応じた位相差が生じるため、位相差より静電容量を測定することができる。 Since the phase difference alternating current and an AC voltage and is in accordance with the electrostatic capacitance is generated, it is possible to measure the capacitance of a phase difference.

センサ本体11は、複数のたて糸とよこ糸とにより形成される。 The sensor body 11 is formed by a plurality of warp and weft. 圧力測定の分解能を向上させる場合には、一本の糸毎の静電容量を測定することが好ましいが、データ処理速度を向上させるため、たて糸又はよこ糸の複数本を一つの観測領域としてデータ処理を行うことが望ましい。 When increasing the resolution of the pressure measurement, it is preferable to measure the capacitance of each single yarn, for improving the data processing speed, the data processing a plurality of warp or weft as one observation area be carried out is desirable.
センサ本体11への加圧の測定は次のとおりである。 Measurements of the pressure of the sensor main body 11 is as follows. まず、LCRメータ13により特定の縦領域11Taと特定の横領域11Yaとの間に交流電流を流し、その後交流電圧を測定する。 First, by LCR meter 13 an alternating current flows between the specific horizontal area 11Ya a specific longitudinal area 11TA, measuring the subsequent AC voltage. 次に、同じ縦領域11Taと隣の横領域11Ybとの間で同様に測定をしていく(図2参照)。 Next, go to the measurement in the same manner with the same longitudinal region 11Ta and the adjacent lateral regions 11Yb (see FIG. 2). この操作をセンサ本体11の全体について行うことで、センサ本体11に係る圧力分布を測定することができる。 By performing this operation for the entire sensor body 11, it is possible to measure the pressure distribution of the sensor body 11.
特定の領域から隣の領域への測定に順序は特に限定されず、横領域を固定しておき、縦領域のみを順に移動させてもよい。 Order to measure the area next to the particular region is not particularly limited, advance to secure the lateral area, only the vertical area may be moved sequentially.
特定の領域の静電容量の測定後、隣への領域の静電容量の測定はタイミング調整部により所定のタイミングで行われる。 After the measurement of the capacitance of a particular area, the measurement of the capacitance of the region to an adjacent is performed at a predetermined timing by the timing adjustment unit. このタイミングは圧力測定の目的やセンサの使用環境に応じて適宜調整される。 This timing is appropriately adjusted depending on the use environment of the object and a sensor of the pressure measurement.
図2の例では縦領域及び横領域はシート本体において、すき間なく連続しているが、これらの間にすき間を設けることもできる。 In the sheet body longitudinal region and the lateral regions in the example of FIG. 2, but continuously and without gaps, it can also be provided a gap between them. また、各領域を相互にオーバーラップさせることもできる。 It is also possible to overlap the regions together.

静電容量−圧力変換部15は、静電容量値から圧力値への変換機能、センサ本体11上の圧力分布図の作成等を行う。 Capacitance - pressure converter unit 15, conversion to the pressure value from the capacitance values, performs operations such as making the pressure distributions on the sensor body 11. LCRメータ13で測定された静電容量のデータは、タイミング調整部14からセンサ上の位置に関するデータが付与され、静電容量−圧力変換部15に渡される。 Data in measured capacitance with LCR meter 13, the data is applied from the timing adjusting unit 14 on the position on the sensor, the capacitance - is passed to the pressure converter 15. 静電容量−圧力変換部15は静電容量から圧力値に変換する。 Capacitance - pressure converter 15 converts the pressure value from the capacitance. 次に、位置に関するデータをもとにセンサ本体上の圧力分布を作成する。 Next, create a pressure distribution on the sensor body on the basis of the data relating to the position. 静電容量−圧力変換部15で得られたデータは、ネットワークを介してPC等で観測することができる。 Capacitance - data obtained by the pressure converter 15 can be observed with PC or the like via a network.

本発明者らは、実験においてシート状センサの静電容量を測定したので、各パラメータを示す。 The present inventors have since measuring the capacitance of the sheet sensor in the experiment shows each parameter. 芯糸に金属繊維直径0.08mmを使用し、カバーリング糸にポリエステルフィラメント糸300Dを使用した。 Using the metal fiber diameter 0.08mm to core yarn was a polyester filament yarn 300D to covering yarn. 撚糸条件としてカバーリング糸を供給するメインスピンドル回転数8000rpm、芯糸送り出しローラーの速度8m/min、仮撚機構は未使用にして撚糸加工した糸をたて糸とよこ糸に使用して、たて糸を60本/6cm、よこ糸を32本/5cmの密度となるよう製織した。 Supplying covering yarn as a twisting condition main spindle speed 8000 rpm, the speed of the core yarn feeding roller 8m / min, false twist mechanism uses the yarn was twisted processed in the unused warp and weft, 60 present a warp / 6 cm, was woven to a density of 32/5 cm and weft. この織物のたて及びよこの導電性繊維に1V、500Hzの交流電圧を与えたとき65pFの静電容量を示し、この状態のまま手で押圧すると77pFに増加した。 The 1V to vertical and horizontal conductive fibers of the fabric, shows a capacitance of 65pF when given an AC voltage of 500 Hz, an increase in 77pF is pressed by hand in this state. また、1V、1MHzの交流電圧を与えたとき67pFの静電容量を示し、この状態のまま手を5cmの距離まで近づけると75pFに増加した。 Further, 1V, shows a capacitance of 67pF when given an AC voltage of 1 MHz, and increased hand in this state to 75pF brought close to a distance of 5 cm.

図3に本発明の実施例であるシート状センサ21を用いた患者モニタリングシステム20の概略図を示す。 The sheet sensor 21 is an embodiment of the present invention shows a schematic view of a patient monitoring system 20 used in FIG. シート状センサ21はケーブルを介してPC23に接続されており、遠隔による患者の監視を行うことができる。 Sheet sensor 21 is connected to the PC23 via the cable, it is possible to monitor the patient by the remote. シート状センサ21の静電容量は、測定装置22を用いて測定され、所定のデータ形式に変換してPC23に送られる。 The capacitance of the sheet sensor 21 is measured using a measuring device 22 and sent to the PC23 is converted into a predetermined data format. シート状センサ21(ベットシート)上に寝ている患者の圧力分布を観測することにより、患者の状況(現在、寝ているのかどうかなど)を確認することができる。 By observing the pressure distribution of a patient lying on the sheet-like sensor 21 (bet sheets), it is possible to check the patient's status (such as whether the currently, sleeping).

シート状センサ21は複数のたて糸及びよこ糸を織物とすることで形成される。 Sheet sensor 21 is formed by a plurality of warp and weft and woven. たて糸及びよこ糸は導電性繊維を芯部として、その周囲を非導電性材料で被覆する構成である。 Warp and weft as core conductive fibers, a structure that covers the periphery of a non-conductive material. そのため、たて糸及びよこ糸を織物とした場合、たて糸とよこ糸との交差部分には、たて糸の導電性繊維とよこ糸の導電性繊維との間に非導電性材料(絶縁体)が挟まれる形となる。 Therefore, when the warp and weft was woven, the intersections of the warp and weft, a form of non-conductive material (insulator) is sandwiched between the conductive fibers of a conductive fiber and weft of the warp . すなわち、たて糸とよこ糸との交差部分にはコンデンサが形成される。 That is, the intersections of the warp and weft capacitor is formed. コンデンサの静電容量は各導電性繊維間(たて糸の芯部とよこ糸の芯部の間)の距離に反比例して増加する。 The capacitance of the capacitor increases in inverse proportion to the distance between the conductive fibers (between the core portion of the core and weft warp). そのため、シート状センサ30を加圧すれば、各導電性繊維間の距離は狭まり、静電容量は増加する。 Therefore, if Assure pressure to the sheet sensor 30, the distance between the conductive fibers narrows, the capacitance increases. この静電容量の変化を観測することにより、ベットで寝ている患者のモニタリングを行うことができる。 By observing the change in the electrostatic capacitance, it is possible to perform monitoring of the patient lying in the bet.

センサ本体は、複数のたて糸とよこ糸とにより形成される。 The sensor body is formed by a plurality of warp and weft. 圧力測定の分解能を向上される場合には、一本の糸毎の静電容量を測定することが好ましいが、データ処理速度を向上させるため、たて糸又はよこ糸の複数本を一つの観測領域としてデータ処理を行う。 If that improve the resolution of the pressure measurement, it is preferable to measure the capacitance of each single yarn, for improving the data processing speed, data a plurality of warp or weft as one observation area processing is carried out.
センサ本体への加圧の測定はLCRメータにより特定の縦領域と特定の横領域との間に交流電流を流し、その後交流電圧を測定する。 Measurements of the pressure of the sensor body is an alternating current flows between the specific horizontal area and a specific longitudinal area with a LCR meter, measuring the subsequent AC voltage. 次に、隣の縦領域と隣の横領域との間で同様に測定をしていく。 Next, go to the similarly measured between the longitudinal region and the adjacent lateral regions next. この操作をセンサ全体について行うことで、センサ本体に係る圧力分布を測定することができる。 By performing this operation for the entire sensor can measure the pressure distribution of the sensor body.
特定の領域の静電容量の測定後、隣への領域の静電容量の測定はタイミング調整部により所定のタイミングで行われる。 After the measurement of the capacitance of a particular area, the measurement of the capacitance of the region to an adjacent is performed at a predetermined timing by the timing adjustment unit.
この動作をシート全体に亘って行い、シート上における圧力分布を測定することができる。 This operation is performed over the entire sheet, it is possible to measure the pressure distribution on the sheet.
得られたデータは所定のデータ形式に変換してPC23に送られる。 The resulting data is sent to PC23 converted into a predetermined data format. シート状センサにおける圧力分布を取得したPC23では、リアルタイムで患者の状況を確認することができる。 In PC23 were obtained pressure distribution in the sheet-like sensor, it is possible to check the status of the patient in real time.

以上のように、患者のモニタリングシステムとしてシート状センサを使用することにより、遠隔による患者の状況確認を行うことができる。 As described above, by using a sheet sensor as a patient monitoring system, it is possible to perform the status check of the patient by the remote. 深夜における患者の状況確認や、独居老人の状況確認に使用できる。 Status check and of the patients in the middle of the night, can be used for status check of elderly people living alone.
また、このシート状センサをホテルなど大規模な建物の室内や廊下のカーペットに使用し、客の移動を把握したり夜間侵入者を監視することも可能である。 In addition, the sheet-like sensor is used in large-scale building of the room and the hallway carpet and hotels, it is also possible to monitor the nighttime intruder or to understand the movement of tourists.

図4は本発明の別の実施例であるシート状センサ31を用いた折り畳み式キーボード30の概略図である。 Figure 4 is a schematic view of a folding keyboard 30 using the sheet sensor 31 is an alternative embodiment of the present invention. シート状センサ31はPC33とケーブルにより接続される。 Sheet sensor 31 is connected by PC33 and cable. シート状センサ31の静電容量は測定装置32により測定され、、所定のデータ形式に変換され、PC33に送られる。 The capacitance of the sheet sensor 31 is measured by the measuring device 32 is converted into a ,, a predetermined data format and sent to the PC 33. シート状センサ31の大きさは、市販のキーボードの大きさと同程度である。 The size of the sheet-like sensor 31 is comparable to the size of commercially available keyboards. キーの配置も通常のものと同じである。 The arrangement of the keys is the same as a normal thing.

シート状センサ31の内部構成は実施例1と同様であるため説明を省略する。 It omitted because the internal configuration of a sheet-like sensor 31 is the same as in Example 1. シート状センサ31には、キーが配置されており、各キーの区別は、各キーに対応する縦領域と横領域により判断される。 The sheet sensor 31, the key is arranged, distinction each key is determined by the vertical area and the lateral region corresponding to each key. キーへの加圧の検出方法は実施例1と同様であるため説明を省略する。 Detection method for application of pressure to the key is omitted because it is similar to that of Example 1.

上記構成により、シート状センサ31上に割り振られたキーを加圧することで、PC上でのキー操作を可能とすることができる。 With the above configuration, by pressurizing the keys allocated on the sheet-like sensor 31, it is possible to enable key operations on the PC.
これにより、デスク上でスペースを占領するキーボードを、使用しない場合には折り畳んで保管することも可能となる。 As a result, the keyboard to occupy a space on the desk, it is also possible to store folded when not in use.
また、シート状センサを使用した電卓、ピアノの鍵盤等にも応用することが可能である。 Further, calculator using a sheet sensor, but may also be applied to the keyboard of a piano.

この発明は、上記発明の実施の形態及び実施例の説明に何ら限定されるものではない。 This invention is not intended to be limited to the description of embodiments and examples of the invention. 特許請求の範囲の記載を逸脱せず、当業者が容易に想到できる範囲で種々の変形態様もこの発明に含まれる。 Without departing from the description of the claims, various modifications within a range that a person skilled in the art can easily conceive also included in the present invention.

図1は本発明のセンサ本体を構成する糸の構成図(A)及び、たて糸とよこ糸との交差部分の断面図(B)である。 Figure 1 is a block diagram of the thread of the sensor body of the present invention (A) and a cross-sectional view of the intersection between the warp and weft (B). 図2はシート状センサを使用した圧力分布測定システムの構成図である。 Figure 2 is a block diagram of the pressure distribution measurement system using a sheet-like sensor. 図3は実施例である患者モニタリングシステムの概略図である。 Figure 3 is a schematic diagram of a patient monitoring system which is Embodiment. 図4は他の実施例である折り畳み式キーボードの概略図である。 Figure 4 is a schematic view of a folding keyboard, which is another embodiment.

符号の説明 DESCRIPTION OF SYMBOLS

1 たて糸又はよこ糸2 導電性繊維3 非導電性材料11 21 31 シート状センサ11Ta 11Tb 縦領域11Ya 11Yb 横領域12 22 32 測定装置 1 warp or weft 2 conductive fiber 3 non-conductive material 11 21 31 sheet sensor 11TA 11TB longitudinal region 11Ya 11Yb lateral region 12 22 32 measuring device

Claims (3)

  1. 導電性繊維と該導電性繊維の周囲を被覆する非導電性材料とからなるたて糸及びよこ糸を含む織物からなるセンサ本体、 Sensor body made of a fabric comprising warp and weft consisting of a non-conductive material covering the external surface of the conductive fiber and conductive fibers,
    前記センサ本体において、縦方向の第1の縦領域に含まれる前記たて糸と横方向の第1の横領域に含まれる前記よこ糸とに電圧を印加する第1の電圧印加手段、及び 前記第1の縦領域と第1の横領域との交差部分の静電容量の変化を検出する第1の手段、 In the sensor main body, a first voltage applying means for applying a voltage to said weft contained in the first lateral region of the warp and weft direction included in the vertical first longitudinal region, and the first first means for detecting a change in capacitance of the intersection of the longitudinal region and the first lateral regions,
    を備えてなるシート状センサ装置。 Sheet sensor device including a.
  2. 前記センサ本体において、縦方向の第2の縦領域に含まれる前記たて糸と横方向の第2の横領域に含まれる前記よこ糸とに電圧を印加する第2の電圧印加手段及び、 In the sensor main body, the second voltage applying means for applying a voltage to said weft in the second lateral region of the warp and weft direction included in the vertical direction second longitudinal regions and,
    前記第2の縦領域と第2の横領域との交差部分の静電容量の変化を検出する第2の手段、 Second means for detecting a change in capacitance of the intersection between the second longitudinal region and a second lateral region,
    を備えてなる請求項1に記載のシート状センサ装置。 Sheet sensor device according to claim 1 comprising comprises a.
  3. 前記センサ本体は複数の縦領域と複数の横領域、を備え、 The sensor body includes a plurality of longitudinal areas and a plurality of lateral areas, and
    所定のタイミングで所定の前記縦領域と所定の前記横領域とを選択し、選択された縦領域に含まれるたて糸と選択された横領域に含まれるよこ糸とに電圧を印加する手段、及び 前記選択された縦領域と前記選択された横領域との静電容量の変化を検出する手段、 Select a predetermined said longitudinal region and predetermined the lateral region at a predetermined timing, means, and said selecting a voltage is applied to the weft included in the warp and the selected lateral areas included in the selected longitudinal regions It means for detecting a change in capacitance between the longitudinal region and the selected lateral region that is,
    を備えてなる請求項1に記載のシート状センサ装置。 Sheet sensor device according to claim 1 comprising comprises a.
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