JPH053875A - Sensor for sweating - Google Patents
Sensor for sweatingInfo
- Publication number
- JPH053875A JPH053875A JP15297891A JP15297891A JPH053875A JP H053875 A JPH053875 A JP H053875A JP 15297891 A JP15297891 A JP 15297891A JP 15297891 A JP15297891 A JP 15297891A JP H053875 A JPH053875 A JP H053875A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- sweating
- sensor
- state
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は健康管理、体調監視等を
目的とした人体情報測定機器に関するものであり、特
に、発汗状態をセンシングする発汗センサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body information measuring device for health management, physical condition monitoring and the like, and more particularly to a perspiration sensor for sensing a perspiration state.
【０００２】[0002]
【従来の技術】近年、成人病予防・健康管理等に対する
関心は、人口の高齢化が進行している現在非常に大きい
ものとなっている。これに伴い、家庭や職場において簡
単に血圧、脈拍、体温等を測定する各種の人体情報機
器、例えば電子体温計、電子血圧計等が提供され、ま
た、血圧、脈拍および体温を総合評価する機器も提案さ
れている。さらに、従来の血圧、脈拍、体温測定のほか
に発汗量、活動量等のセンシングにより精神的、肉体的
活動状態を検出し、その結果に基づいての人体の異常状
態検知が必要性となってきている。しかしながら、発汗
状態をセンシングするポータブル機器の開発は余りなさ
れていない。従来の発汗状態のセンシング機器として
は、人体に装着したカプセルに乾燥窒素ガスを流入させ
その湿度の増加分から発汗量を測定するものや人体皮膚
表面近傍の湿度を大気湿度との差から検出する方法が主
であり、センシング手段としては湿度センサが利用（実
開昭６１−１０１０１４号公報）されている。我々は、
皮膚表面に電極を接触させて皮膚表面のインピーダンス
を測定することを提案した。2. Description of the Related Art In recent years, interest in prevention of adult diseases and health management has become very great at present with the aging of the population. Along with this, various human body information devices that easily measure blood pressure, pulse, body temperature, etc. at home and work, such as electronic thermometers, electronic blood pressure monitors, etc., are also provided, and there is also a device that comprehensively evaluates blood pressure, pulse and body temperature. Proposed. In addition to the conventional measurement of blood pressure, pulse, and body temperature, it is necessary to detect mental and physical activity states by sensing the amount of sweat, the amount of activity, etc., and to detect the abnormal state of the human body based on the results. ing. However, the development of a portable device that senses a sweating state has not been made much. As a conventional perspiration state sensing device, dry nitrogen gas is introduced into a capsule attached to the human body to measure the amount of perspiration from the increase in humidity, or a method of detecting the humidity near the human skin surface from the difference with atmospheric humidity. The humidity sensor is used as a sensing means (Japanese Utility Model Laid-Open No. 61-101014). we,
It was proposed to contact the electrode with the skin surface and measure the impedance of the skin surface.
【０００３】[0003]
【発明が解決しようとする課題】従来の湿度センサを用
いる発汗センサは大がかりな測定装置であり、また着脱
等測定に要する手間を考えると、これらは日常的に測定
機器装着者（以下、被測定者と称する）に装着して手軽
に測定するという観点からは不適当なものであった。さ
らに、従来の湿度センサは化学センサであり経時変化も
大きく測定誤差が大きかった。さらに、提案した皮膚の
インピーダンス測定は、非常に簡易に発汗状態を測定で
きるが、皮膚と電極間の水分が滞留して、汗の引きを検
知するのが困難であった。A conventional sweat sensor using a humidity sensor is a large-scale measuring device, and considering the labor required for measurement such as putting on and taking off, these are routinely worn by a person who wears a measuring device (hereinafter referred to as a measured object). It is unsuitable from the viewpoint of being easily attached to a person) and measuring easily. Further, the conventional humidity sensor is a chemical sensor, and its change with time is large and the measurement error is large. Furthermore, although the proposed impedance measurement of the skin can very easily measure the sweating state, it was difficult to detect the pull of sweat due to the retention of water between the skin and the electrode.
【０００４】[0004]
【課題を解決するための手段】本発明は、上述の課題を
解決するため、人体の皮膚インピーダンスを測定する、
検出電極の保持部に通気孔を設けることにより皮膚から
の水分の蒸発を促し電極を装着していない皮膚表面と同
様の発汗状態をセンシングするものである。すなはち、
運動、体温上昇により皮膚表面に発生した汗が電極間電
気抵抗を低下させることに基づくものであり、小型で簡
便な測定手段、測定法により発汗状態がセンシングでき
るものである。In order to solve the above problems, the present invention measures the skin impedance of the human body,
By providing a ventilation hole in the holding portion of the detection electrode, evaporation of water from the skin is promoted, and a perspiration state similar to that on the skin surface without the electrode is sensed. Sunahachi,
It is based on the fact that sweat generated on the skin surface due to exercise and increase in body temperature lowers the electric resistance between electrodes, and the sweating state can be sensed by a small and simple measuring means and measuring method.
【０００５】[0005]
【作用】本発明によれば、電極間に通気孔部を形成して
いるので発汗の始まり及び汗の引き状態を精度よく検知
でき、また人体に常時装着可能な小型ポータブル発汗セ
ンサが実現できる。According to the present invention, since the vent holes are formed between the electrodes, the onset of sweating and the state of sweating can be accurately detected, and a small portable sweat sensor that can be always worn on the human body can be realized.
【０００６】[0006]
【実施例】図１は本発明の一実施例による発汗センサの
概略構成を示すものであって、１はセラミックスからな
る電極保持部であり、これは樹脂、布等であってもよ
い。２は耐酸化性に優れた金からなる金属電極で体表面
に接触する露出電極であり、銀、白金、ステンレス、ニ
クロム等であってもよい。３はリード電極、４は電気回
路を各々示す。1 shows a schematic structure of a sweat sensor according to an embodiment of the present invention, in which reference numeral 1 denotes an electrode holding portion made of ceramics, which may be resin, cloth or the like. Reference numeral 2 denotes a metal electrode made of gold having excellent oxidation resistance, which is an exposed electrode that comes into contact with the body surface, and may be silver, platinum, stainless steel, nichrome, or the like. Reference numeral 3 indicates a lead electrode, and 4 indicates an electric circuit.
【０００７】露出電極２の形状は、体表面に接触し易い
ように凸状になっているのが好ましい。例えば、０．５
ｍｍ巾の金電極をプラスチックバンドの上に設けたもの
でもよい。電極間隔は０．５ｍｍ〜１０ｍｍ程度がよ
い。電極保持部１は、図１に示すように凹部をもうけ通
気孔部５を形成し、発汗した水分を逃がしてやるような
構造にしてある。The exposed electrode 2 preferably has a convex shape so as to easily contact the body surface. For example, 0.5
A gold electrode having a width of mm may be provided on a plastic band. The electrode interval is preferably about 0.5 mm to 10 mm. As shown in FIG. 1, the electrode holding portion 1 has a structure in which a concave portion is provided and a vent hole portion 5 is formed so that the water perspiration is released.
【０００８】さらに、電極保持部１に図２のように多孔
体６を使用することにより通気孔部となる凹部５以外に
も空気の通り道を増やし蒸発しやすくして、電極を装着
していない皮膚上と同様に汗の引きも精度良く検知でき
る。この場合、凹部５を多孔体６で埋めても測定は可能
であるが、多孔体表面に汗が淀んで測定制度および発汗
状態の変化に対する追随性が低下する場合がある。Further, by using the porous body 6 in the electrode holding portion 1 as shown in FIG. 2, the passage of the air is increased in addition to the concave portion 5 serving as the ventilation hole portion to facilitate evaporation and no electrode is attached. Sweat pull can be detected with high accuracy as well as on the skin. In this case, the measurement can be performed even if the concave portion 5 is filled with the porous body 6, but there is a case in which sweat stagnates on the surface of the porous body and the followability with respect to changes in measurement accuracy and perspiration state is reduced.
【０００９】なお、前記多孔体６は３次元のスポンジ状
でもよいが湿度センサ部へ直線状に連なる格子状の孔を
持つ場合応答性がよい。また材質はセラミックに限ら
ず、樹脂でもよい。ハニカム構造（孔径１００μｍ）の
セラミックスが、空気の透過率が高く適していた。The porous body 6 may be in the form of a three-dimensional sponge, but when it has lattice-shaped holes linearly connected to the humidity sensor, it has good responsiveness. Further, the material is not limited to ceramic and may be resin. Ceramics having a honeycomb structure (pore diameter 100 μm) were suitable because of high air permeability.
【００１０】図２に示すように、手首の体表面上にバン
ド７を用いて上記発汗センサを露出電極部２が体表面に
接触するように固定し、１０ｋＨｚの測定周波数、平均
印加電圧０Ｖ、電圧振幅０．５Ｖによりインピーダンス
を測定した。図３に室温を上げたときの発汗状態とイン
ピーダンスを示す。乾燥状態とは皮膚表面を乾いた状
態、発汗状態初期とは発汗により汗が若干にじんできた
状態、発汗状態とは汗で皮膚表面が濡れた状態をさす。
図３から明らかなように発汗状態は本発明の皮膚表面の
インピーダンスを測定することにより精度良く評価でき
ることが分った。また、測定ばらつきも小さく安定した
値が得られた。従来の定電流法や定電圧法による電気抵
抗測定においては、発汗状態と乾燥状態の差異は分るが
細かい発汗状態を評価するには測定値がばらつき過ぎて
不可能であった。さらに、図４に室温を低下させて汗が
引いた場合のインピーダンス変化を示したが、通気孔部
５のないセンサでは、インピーダンスの戻りが通気孔部
を設けたセンサより悪かった。これは、センサと皮膚間
の汗が保持され蒸発できないことが原因と考えられる。
以上より、通気孔部５を付加することにより発汗の出
現、汗の引き状態を精度よく検出することが可能となっ
た。As shown in FIG. 2, the perspiration sensor is fixed on the body surface of the wrist using a band 7 so that the exposed electrode portion 2 is in contact with the body surface, and the measurement frequency is 10 kHz and the average applied voltage is 0 V. The impedance was measured with a voltage amplitude of 0.5V. FIG. 3 shows the sweating state and the impedance when the room temperature is raised. The dry state means a state where the skin surface is dry, the initial sweating state means a state where sweat is slightly bleeding due to sweating, and the sweating state means a state where the skin surface is wet with sweat.
As is clear from FIG. 3, it was found that the sweating state can be evaluated with high accuracy by measuring the impedance of the skin surface of the present invention. In addition, the measurement variation was small and stable values were obtained. In the conventional electric resistance measurement by the constant current method or the constant voltage method, the difference between the sweating state and the dry state is known, but it is impossible to evaluate the fine sweating state because the measured values are too varied. Furthermore, FIG. 4 shows the impedance change when the room temperature is lowered and sweat is drawn, but in the sensor without the vent hole portion 5, the impedance return was worse than that in the sensor provided with the vent hole portion. It is considered that this is because the sweat between the sensor and the skin is retained and cannot evaporate.
As described above, the appearance of sweating and the pulling state of sweat can be accurately detected by adding the vent holes 5.
【００１１】なお、測定周波数については１０Ｈｚから
１０ＭＨｚまでの範囲で評価することができた。周波数
が高くなるに連れてインピーダンスの値が小さくなるが
ばらつきも小さくなるのでインピーダンスの変化を追い
かけることで発汗を評価できる。本実験に用いたセンサ
ヘッドの場合、測定周波数が２０ＫＨｚ以下では乾燥状
態は測定不能であり、発汗状態において観測可能とな
る。The measurement frequency could be evaluated in the range of 10 Hz to 10 MHz. As the frequency becomes higher, the impedance value becomes smaller, but the variation becomes smaller, so that sweating can be evaluated by following the impedance change. In the case of the sensor head used in this experiment, when the measurement frequency is 20 KHz or less, the dry state cannot be measured and can be observed in the sweating state.
【００１２】電極保持部のセラミックスをテフロン加工
により撥水処理して発汗センサを実施例１と同様に作製
した。処理をしないで作製したセンサでは、通気孔部の
高さが十分でない場合、多孔質の内部に汗がトラップさ
れインピーダンスが大きく低下し、皮膚上の湿り具合い
を検出できない場合があったが、処理をすることで汗が
はじかれるため、別のパスができることなく、精度良く
発汗状態を測ることができた。撥水処理としては、シリ
コンコーティングした樹脂を用いても同様な効果が得ら
れた。また、疎水性の樹脂で電極保持部を形成してもよ
い。A perspiration sensor was produced in the same manner as in Example 1 by subjecting the ceramic of the electrode holding portion to a water repellent treatment by Teflon processing. In the sensor made without treatment, when the height of the vent hole was not sufficient, sweat was trapped inside the porous body and the impedance dropped significantly, and the wetness on the skin could not be detected. Since the sweat was repelled by doing, I was able to measure the sweating condition accurately without making another pass. As the water repellent treatment, the same effect was obtained even when a silicone-coated resin was used. Further, the electrode holding part may be formed of a hydrophobic resin.
【００１３】本発明の発汗センサの取り付け位置は、時
計バンドの内側、指輪、ヘアバンド等体表面に接触でき
る位置であれがよく特に限定されるものではないが、装
着位置として、ポータブル手首装着型がより正確に発汗
状態を検知できた。The attachment position of the perspiration sensor of the present invention is not particularly limited as long as it can contact the inside of the watch band, the ring, the hair band or the like, but is not particularly limited. Was able to detect the sweating state more accurately.
【００１４】[0014]
【発明の効果】以上のように、本発明においては被測定
者の発汗状態を精度良く評価することを可能とする。As described above, according to the present invention, it is possible to accurately evaluate the sweating state of the person to be measured.
【図１】本発明の一実施例の発汗センサの断面図FIG. 1 is a sectional view of a perspiration sensor according to an embodiment of the present invention.
【図２】本発明の異なる実施例の発汗センサの断面図FIG. 2 is a sectional view of a sweat sensor according to another embodiment of the present invention.
【図３】本発明の実施例の発汗センサの応答特性図FIG. 3 is a response characteristic diagram of the sweat sensor of the embodiment of the present invention.
【図４】本発明の実施例の発汗センサの応答特性図FIG. 4 is a response characteristic diagram of the sweat sensor of the embodiment of the present invention.
１ センサヘッド基材 ２ 露出電極 ３ リード電極 ４ 電気回路部 ５ 通気孔部 ６ 多孔体 ７ バンド 1 Sensor head base material 2 exposed electrode 3 lead electrode 4 Electric circuit section 5 ventilation holes 6 Porous body 7 bands
───────────────────────────────────────────────────── フロントページの続き (72)発明者 有田 浩二 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Koji Arita 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Sangyo Co., Ltd.
Claims (4)
部が、少なくとも２個以上の露出電極を具備し、前記電
極保持部とおよび前記電極間に通気孔部を形成し、、前
記電極間の皮膚表面のインピ−ダンスを測定して発汗状
態を検知することを特徴とする発汗センサ。1. A sensor head part that comes into contact with the skin surface of a human body is provided with at least two exposed electrodes, and a vent hole part is formed between the electrode holding part and the electrode, and between the electrodes. A perspiration sensor characterized by detecting the perspiration state by measuring the impedance of the skin surface.
したことを特徴とする請求項１記載の発汗センサ。2. The perspiration sensor according to claim 1, wherein a porous body is provided between the exposed electrodes to form a ventilation hole portion.
成したことを特徴とする請求項２記載の発汗センサ。3. The perspiration sensor according to claim 2, wherein a concave portion is formed on a surface of the porous body which is in contact with human skin.
特徴とする請求項１、２または３記載の発汗センサ。4. The perspiration sensor according to claim 1, 2 or 3, wherein the surface of the electrode holding portion is made hydrophobic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15297891A JPH053875A (en) | 1991-06-25 | 1991-06-25 | Sensor for sweating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15297891A JPH053875A (en) | 1991-06-25 | 1991-06-25 | Sensor for sweating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH053875A true JPH053875A (en) | 1993-01-14 |
Family
ID=15552292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15297891A Pending JPH053875A (en) | 1991-06-25 | 1991-06-25 | Sensor for sweating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH053875A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2170024A1 (en) * | 2000-11-30 | 2002-07-16 | Univ Valladolid | Cyclical measuring system of physical and mechanical parameters used during physical exertion in sportsmen in general but particularly in cyclists |
| JP2009505712A (en) * | 2005-09-02 | 2009-02-12 | ザ プロクター アンド ギャンブル カンパニー | How to measure skin moisture |
| JP2009508543A (en) * | 2005-09-02 | 2009-03-05 | ザ プロクター アンド ギャンブル カンパニー | How to measure moisture as a predictor of scalp health |
| JP2020044129A (en) * | 2018-09-19 | 2020-03-26 | マツダ株式会社 | Sweat detection device |
| WO2022191323A1 (en) * | 2021-03-11 | 2022-09-15 | 国立大学法人東京大学 | Skin resistance measurement device, skin responsiveness assessment method, and behavior/emotion determination method |
-
1991
- 1991-06-25 JP JP15297891A patent/JPH053875A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2170024A1 (en) * | 2000-11-30 | 2002-07-16 | Univ Valladolid | Cyclical measuring system of physical and mechanical parameters used during physical exertion in sportsmen in general but particularly in cyclists |
| JP2009505712A (en) * | 2005-09-02 | 2009-02-12 | ザ プロクター アンド ギャンブル カンパニー | How to measure skin moisture |
| JP2009508543A (en) * | 2005-09-02 | 2009-03-05 | ザ プロクター アンド ギャンブル カンパニー | How to measure moisture as a predictor of scalp health |
| JP2020044129A (en) * | 2018-09-19 | 2020-03-26 | マツダ株式会社 | Sweat detection device |
| WO2022191323A1 (en) * | 2021-03-11 | 2022-09-15 | 国立大学法人東京大学 | Skin resistance measurement device, skin responsiveness assessment method, and behavior/emotion determination method |
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