JPH0433641A - Biodisplacement detector - Google Patents
Biodisplacement detectorInfo
- Publication number
- JPH0433641A JPH0433641A JP2140192A JP14019290A JPH0433641A JP H0433641 A JPH0433641 A JP H0433641A JP 2140192 A JP2140192 A JP 2140192A JP 14019290 A JP14019290 A JP 14019290A JP H0433641 A JPH0433641 A JP H0433641A
- Authority
- JP
- Japan
- Prior art keywords
- living body
- electrode
- change
- displacement
- electrode plate
- 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
- 239000011888 foil Substances 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 abstract description 28
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 230000010355 oscillation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 210000001015 abdomen Anatomy 0.000 description 3
- 230000000241 respiratory effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
Landscapes
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
この発明は、生体(被検体)の部分的変化、たとえば呼
吸運動、心臓の拍動などによる腹部、胸部などの一部の
動きを、静電容量の変化として検出する生体変位検出器
に関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention is capable of statically detecting partial changes in a living body (subject), such as movements of a portion of the abdomen or chest due to breathing movement, heartbeat, etc. This invention relates to a biological displacement detector that detects changes in capacitance.
(従来の技術)
従来のこの種生体変位検出器においても、生体変位を静
電容量の変化として検出するようにしたものが知られて
いる。(Prior Art) Among conventional biological displacement detectors of this type, one is known that detects biological displacement as a change in capacitance.
従来では、電極と生体との間の距離が、生体の部分的変
位によって変化することに着目し、前記距離の変化を1
両者間の静電容量の変化として取りだし、これから生体
の変位を検出するようにしている。Conventionally, focusing on the fact that the distance between the electrode and the living body changes due to partial displacement of the living body, the change in distance is calculated as 1.
The change in capacitance between the two is detected, and the displacement of the living body is detected from this.
(発明が解決しようとする課題)
しかしこのような検出手段によると、生体の変位に対す
る静電容量の変化は僅かであり、この変化から生体の変
位を正確に検出するのは極めて困難である。(Problem to be Solved by the Invention) However, according to such a detection means, the change in capacitance with respect to the displacement of the living body is slight, and it is extremely difficult to accurately detect the displacement of the living body from this change.
この発明は、生体の変位を静電容量の変化として検出す
るに当り、その検出感度を向上させることを目的とする
。The present invention aims to improve the detection sensitivity when detecting the displacement of a living body as a change in capacitance.
(課題を解決するための手段)
この発明は、可撓性かつ復元性の高い電極板と、前記電
極板に相対する、金属箔からなる電極箔と、前記電極板
と電極箔との間に介在される、可撓性かつ復元性の高い
誘電体シートとによって構成し。(Means for Solving the Problems) The present invention provides an electrode plate having high flexibility and resilience, an electrode foil made of metal foil facing the electrode plate, and a gap between the electrode plate and the electrode foil. It is composed of a flexible and highly resilient dielectric sheet interposed therebetween.
外圧の変化および生体(被検体)との間の距離変化を、
前記電極板と前記電極箔との間の静電容量の変化として
出力するようにしたことを特徴とする。Changes in external pressure and distance between the living body (subject) and
It is characterized in that the output is output as a change in capacitance between the electrode plate and the electrode foil.
(作用)
前記のようにして構成される検出器は、生体の任意の位
置、たとえば生体に直接にあるいは被服を介して間接的
に装着される。ここで生体の呼吸運動などによる変位が
発生すると、その変位が外圧となって、電極板と電極箔
との間の距離が変化し1両者の間の静電容量が変化する
。(Function) The detector configured as described above is attached to an arbitrary position of a living body, for example, directly on the living body or indirectly through clothing. When a displacement occurs due to breathing movement of the living body, the displacement becomes an external pressure, the distance between the electrode plate and the electrode foil changes, and the capacitance between the two changes.
また同時に生体の変位によって電極箔(または電極板)
と生体との間の距離が変化し、これによって電極箔と生
体との間の静電容量が変化する。At the same time, the electrode foil (or electrode plate) is changed due to the displacement of the living body.
The distance between the electrode foil and the living body changes, thereby changing the capacitance between the electrode foil and the living body.
すなわち生体の変位は、電極板と電極箔との間の静電容
量の変化と、電極箔と生体との間の静電容量の変化とを
合算した変化として検出されることになる。これによっ
て生体の変化を高感度で検出することができるようにな
る。In other words, the displacement of the living body is detected as the sum of the change in capacitance between the electrode plate and the electrode foil and the change in the capacitance between the electrode foil and the living body. This makes it possible to detect changes in the living body with high sensitivity.
生体の呼吸運動などによる変位は繰り返される。Displacement due to breathing movement of the living body is repeated.
その吸気運動の際に外圧が加わったことによって、電極
箔、誘電体シートは変形される。しかし次の呼気運動に
よって外圧が解除されると、電極箔、誘電体シートは、
当初の状態に復元する。これによって各呼吸運動の繰返
しに応答して、生体の変位を静電容量の変化として取り
だすことができるようになる。The electrode foil and dielectric sheet are deformed by the application of external pressure during the intake movement. However, when the external pressure is released by the next expiratory movement, the electrode foil and dielectric sheet
Restore to original state. This makes it possible to extract the displacement of the living body as a change in capacitance in response to each repetition of respiratory movement.
(実施例)
この発明の実施例を図によって説明する。1は検出器の
核となる電極板で、薄い金属板(たとえば0.3mm程
度の燐青銅板、黄銅板など)、または0.511m+程
度のアクリル樹脂板の両面に金属膜をスパッタリングし
たものが使用され、可撓性かつ復元性が高いようにされ
である。(Example) An example of the present invention will be described with reference to the drawings. 1 is an electrode plate that is the core of the detector, and is a thin metal plate (for example, a phosphor bronze plate or brass plate of about 0.3 mm) or an acrylic resin plate of about 0.511 m+ with a metal film sputtered on both sides. It is used to make it highly flexible and resilient.
2は電極板1に摺面する電極箔で、後記する誘電体シー
トの可撓性、復元性を阻害しないように、厚さが10〜
15μ園程度の金gItNによって構成されである。Reference numeral 2 denotes an electrode foil that slides on the electrode plate 1, and has a thickness of 10 to 10 mm so as not to impede the flexibility and restorability of the dielectric sheet, which will be described later.
It is composed of about 15 μm of gold gItN.
3は電極板lと電極M2との間に介在される誘電体シー
トで、僅かな外圧の変化に電極箔2が対応して電極板1
との間の静電容量変化が出力できるように、可撓性かつ
復元性の高いものが使用される。たとえば厚さ約10μ
m程度のポリエチレンシートが使用される。Reference numeral 3 denotes a dielectric sheet interposed between the electrode plate 1 and the electrode M2, and the electrode foil 2 responds to slight changes in external pressure to cause the electrode plate 1 to
A highly flexible and resilient material is used so that changes in capacitance between the two can be output. For example, about 10μ thick
A polyethylene sheet with a diameter of about 100 m is used.
4は電極板1のリード線、5は電極箔2のリード線、6
は全体を保護絶縁し、一体化する外皮である。以上のよ
うにしてこの発明の検出器7が構成される。4 is the lead wire of the electrode plate 1, 5 is the lead wire of the electrode foil 2, 6
is the outer skin that protects, insulates, and integrates the whole. The detector 7 of the present invention is configured as described above.
図の例では電極板1の両面に誘電体シート3および電極
箔2を対面させているが、このようにしておくと、電極
板1からみて左右対称に誘電体シ、 −ト3、電極箔
2が存在するようになり、したがって検出器7をその表
裏を考慮することなく生体に装着しても、特性に差が現
れることがなくて都合がよい。In the example shown in the figure, the dielectric sheet 3 and the electrode foil 2 are made to face each other on both sides of the electrode plate 1, but if this is done, the dielectric sheet 3, the electrode foil 2, and the dielectric sheet 3 are placed symmetrically when viewed from the electrode plate 1. Therefore, even if the detector 7 is attached to a living body without considering its front and back sides, there will be no difference in characteristics, which is convenient.
なおこの構成に代えて、電極板1の一方の面にのみ誘電
体シート3、電極[2を対面させた構成でも、もちろん
良い。Note that instead of this configuration, a configuration in which the dielectric sheet 3 and the electrode [2] are made to face only one surface of the electrode plate 1 may also be used.
検出器7は生体の任意の位置に、たとえば生体と被服と
の間に挟むように直接的に、あるいは被服間に挟むよう
に間接的に装着される。また電極板1、電極箔2は検出
器駆動発振回路に接続される。このとき電極板1は生体
と同電位となる。The detector 7 is attached to an arbitrary position on the living body, for example, directly by being sandwiched between the living body and clothing, or indirectly by being sandwiched between clothing. Further, the electrode plate 1 and the electrode foil 2 are connected to a detector drive oscillation circuit. At this time, the electrode plate 1 has the same potential as the living body.
ここで生体の呼吸運動、心臓の拍動による腹部あるいは
胸部の動きによって、生体に変位が発生すると、その変
位が外圧となって、電極板1と電極i2との間の距離が
変化し、両者の間の静電容量が変化する。When a displacement occurs in the living body due to the breathing movement of the living body or movement of the abdomen or chest due to the heartbeat, the displacement becomes external pressure and the distance between the electrode plate 1 and the electrode i2 changes, causing both The capacitance between changes.
また同時に前記した生体の変位によって電極箔2(また
は電極板1)と生体との間の距離が変化し、これによっ
て電極箔2と生体との間の静電容量が変化する。At the same time, the distance between the electrode foil 2 (or electrode plate 1) and the living body changes due to the above-mentioned displacement of the living body, thereby changing the capacitance between the electrode foil 2 and the living body.
このようにして生体の変位は、電極板1と電極M2との
間の静電容量の変化と、電極箔2と生体との間の静電容
量の変化とを合算した変化として検出されることになる
。これによって生体の変化を高感度で検出することがで
きるようになる。In this way, the displacement of the living body is detected as a change in the capacitance between the electrode plate 1 and the electrode M2 and the capacitance between the electrode foil 2 and the living body. become. This makes it possible to detect changes in the living body with high sensitivity.
生体の前記した呼吸運動などによる変位は繰り返される
。その吸気運動の際に外圧が加わったことによって、電
極@2、誘電体シート3は変形される。しかし次の呼気
運動によって外圧が解除されと、電極箔2、誘電体シー
ト3は、当初の状態に復元する。これによって各呼吸運
動の繰返しに応答して、生体の変位を静電容量の変化と
して取りだすことができるようになる。The displacement caused by the above-mentioned breathing movement of the living body is repeated. The electrode @2 and the dielectric sheet 3 are deformed by the application of external pressure during the intake movement. However, when the external pressure is released by the next exhalation movement, the electrode foil 2 and dielectric sheet 3 return to their original states. This makes it possible to extract the displacement of the living body as a change in capacitance in response to each repetition of respiratory movement.
第3図に検出器駆動発振回路の一例を示す。図の例はハ
ートレー発振回路を使用したもので、検出器7は共振コ
イル11と並列に接続される。このとき電極箔2は高電
位側に、電極板1は接地電位側に接続される。FIG. 3 shows an example of a detector drive oscillation circuit. The illustrated example uses a Hartley oscillation circuit, and the detector 7 is connected in parallel with the resonant coil 11. At this time, the electrode foil 2 is connected to the high potential side, and the electrode plate 1 is connected to the ground potential side.
検出器7の静電容量が変化すると、発振周波数が変化し
、これがトランジスタ12の負荷コイル13によって発
振振幅変化に変換されて、バッファトランジスタ14に
伝達される(第4図の波形図を参照。)。When the capacitance of the detector 7 changes, the oscillation frequency changes, which is converted into an oscillation amplitude change by the load coil 13 of the transistor 12 and transmitted to the buffer transistor 14 (see the waveform diagram in FIG. 4). ).
バッファトランジスタ14は第5図の波形図に示すよう
に、発振振幅変化を検波増幅し出力する。The buffer transistor 14 detects and amplifies the oscillation amplitude change and outputs it, as shown in the waveform diagram of FIG.
第5図の波形図は、検出器7を腹部付近に装着して呼吸
運動を検出したときの出力波形図である。The waveform diagram in FIG. 5 is an output waveform diagram when the detector 7 is attached near the abdomen to detect respiratory motion.
(発明の効果)
以上詳述したようにこの発明によれば、生体の変位に基
づいて、検出器に与えられる外圧の変化による静電容量
の変化、および検出器とこれを装着した生体との間の静
電容量の変化の合成を、互いに対面する2極をもつ検出
器の静電容量変化として出力することができ、したがっ
て従来構成に比較して高感度で生体変位の変化を検出す
ることができる効果を奏する。(Effects of the Invention) As detailed above, according to the present invention, based on the displacement of the living body, changes in capacitance due to changes in external pressure applied to the detector, and changes in the capacitance between the detector and the living body wearing it, are detected. The combination of changes in capacitance between the two electrodes can be output as a change in capacitance of a detector with two poles facing each other. Therefore, changes in biological displacement can be detected with higher sensitivity than with conventional configurations. It produces the effect that can be achieved.
第1図はこの発明の実施例を示す正面図、第2図は同断
面図、第3図は検出器駆動発振回路の一例を示す回路図
、第4図、第5図は同動作説明用の波形図である。Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a sectional view thereof, Fig. 3 is a circuit diagram showing an example of a detector drive oscillation circuit, and Figs. 4 and 5 are for explanation of the same operation. FIG.
Claims (1)
る、金属箔からなる電極箔と、前記電極板と電極箔との
間に介在される、可撓性かつ復元性のある誘電体シート
とからなり、外圧の変化および被検体との間の距離変化
を、前記電極板と前記電極箔との間の静電容量の変化と
して出力する生体変位検出器。a flexible and restorable electrode plate, an electrode foil made of metal foil opposite to the electrode plate, and a flexible and restorable dielectric interposed between the electrode plate and the electrode foil. a body sheet, and outputs changes in external pressure and changes in distance from the subject as changes in capacitance between the electrode plate and the electrode foil.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2140192A JPH0433641A (en) | 1990-05-30 | 1990-05-30 | Biodisplacement detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2140192A JPH0433641A (en) | 1990-05-30 | 1990-05-30 | Biodisplacement detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0433641A true JPH0433641A (en) | 1992-02-05 |
Family
ID=15263054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2140192A Pending JPH0433641A (en) | 1990-05-30 | 1990-05-30 | Biodisplacement detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0433641A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7052469B2 (en) | 2002-11-25 | 2006-05-30 | Sanyo Electric Co., Ltd. | Heart beat/respiration measuring device |
WO2015156174A1 (en) * | 2014-04-09 | 2015-10-15 | バンドー化学株式会社 | Sensor device |
JP2016019588A (en) * | 2014-07-14 | 2016-02-04 | 国立研究開発法人産業技術総合研究所 | Biological signal detector |
-
1990
- 1990-05-30 JP JP2140192A patent/JPH0433641A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7052469B2 (en) | 2002-11-25 | 2006-05-30 | Sanyo Electric Co., Ltd. | Heart beat/respiration measuring device |
WO2015156174A1 (en) * | 2014-04-09 | 2015-10-15 | バンドー化学株式会社 | Sensor device |
JP6053988B2 (en) * | 2014-04-09 | 2016-12-27 | バンドー化学株式会社 | Sensor device |
TWI642408B (en) * | 2014-04-09 | 2018-12-01 | 日商阪東化學股份有限公司 | Sensing device |
EP3868295A1 (en) * | 2014-04-09 | 2021-08-25 | Bando Chemical Industries, Ltd. | Method of tracing a deformation of a surface of a living body |
JP2016019588A (en) * | 2014-07-14 | 2016-02-04 | 国立研究開発法人産業技術総合研究所 | Biological signal detector |
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