JPH0712348B2 - Photoelectric pulse wave detector - Google Patents
Photoelectric pulse wave detectorInfo
- Publication number
- JPH0712348B2 JPH0712348B2 JP2881287A JP2881287A JPH0712348B2 JP H0712348 B2 JPH0712348 B2 JP H0712348B2 JP 2881287 A JP2881287 A JP 2881287A JP 2881287 A JP2881287 A JP 2881287A JP H0712348 B2 JPH0712348 B2 JP H0712348B2
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- pulse wave
- light
- fingertip
- wave detector
- 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.)
- Expired - Lifetime
Links
- 239000004020 conductor Substances 0.000 claims description 20
- 210000000624 ear auricle Anatomy 0.000 claims description 5
- 239000000615 nonconductor Substances 0.000 claims description 4
- 239000008280 blood Substances 0.000 claims description 3
- 210000004369 blood Anatomy 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は血液循環機能を検査する脈波計の検出器に関す
るものである。Description: TECHNICAL FIELD The present invention relates to a pulse wave detector for examining blood circulation function.
従来の技術 従来、脈波の検出には最も一般的に、指尖，耳朶等の血
液量の増減を光の透過度によって検出する方式（光電式
脈波）が用いられており市販されている。この検出器
は、光源（ＷランプあるいはLED）からの光を、受光器
（CdS,CdSeなど）が指尖，耳朶を通して受光するもので
ある。そして受光量に応じた電気信号を表示部で脈波と
して記録，表示するものであった。2. Description of the Related Art Conventionally, the most commonly used pulse wave detection method is a method (photoelectric pulse wave) that detects an increase or decrease in blood volume of a fingertip, an earlobe, or the like by light transmittance, and is commercially available. . In this detector, light from a light source (W lamp or LED) is received by a light receiver (CdS, CdSe, etc.) through a fingertip or an earlobe. Then, an electric signal corresponding to the amount of received light is recorded and displayed as a pulse wave on the display unit.
発明が解決しようとする問題点 このような従来の構成では受光量に応じて生ずる電気信
号の変動分が数mVと極めて微小な電圧変化であるため、
指尖，耳朶等を検出器に入れると、浮遊ノイズ（50又は
60ヘルツが主体）が受光器に乗り、脈波のノイズとなっ
ている。したがって、ノイズ対策としては各種のフィル
ター回路を設けこれを除去しなければならない。Problems to be Solved by the Invention In such a conventional configuration, since the fluctuation of the electric signal generated according to the amount of received light is a very small voltage change of several mV,
If you put fingertips, earlobe, etc. in the detector, stray noise (50 or
60 Hz is the main), which gets on the receiver and becomes pulse wave noise. Therefore, as a measure against noise, various filter circuits must be provided and removed.
とくに、脈波を二次微分して加速度脈波として表示する
場合には、ノイズによる変化分が大きく効くため、ノイ
ズを極めて小さく（できれば無くす）する必要があっ
た。In particular, when the pulse wave is second-order differentiated and displayed as an acceleration pulse wave, the change due to noise is very effective, so it is necessary to reduce the noise extremely (if possible, eliminate it).
本発明はこのような従来の問題点を解消したもので、ノ
イズ対策を簡単な構成により行なった光電式脈波検出器
を提供するものである。The present invention solves the above-mentioned conventional problems, and provides a photoelectric pulse wave detector in which measures against noise are performed with a simple structure.
問題点を解決するための手段 本発明はこのような問題点を解決するために、受光器の
前面に導電体を設け、浮遊ノイズを受光器に乗せること
なく導電体に逃がし、このノイズを導電体を通して接地
させるものである。Means for Solving the Problems In order to solve such a problem, the present invention provides a conductor on the front surface of a light receiver, and allows stray noise to escape to the conductor without being carried on the light receiver, and the noise is conducted. It is intended to be grounded through the body.
作用 この構成により浮遊ノイズは導電体を通り、アースされ
るため受光器に何らの影響がなく、したがって、脈波の
ノイズとならずフィルター回路が低減あるいは不要とな
り検出器以後の脈波処理回路が極めて簡単になる。Action With this configuration, stray noise passes through the conductor and is grounded, so there is no effect on the light receiver. Therefore, it does not become noise of the pulse wave and the filter circuit is reduced or unnecessary and the pulse wave processing circuit after the detector is It will be extremely easy.
実施例 以下、本発明の一実施例について添付図面をもとに説明
する。図において、１は指尖又は耳朶の血液量の増減を
光の透過度によって検出する検出器で、光源２、受光器
３および光透過性の導電体４を検出器本体1aに内蔵して
いる。受光器３は接地された金属ケース3aの中に受光体
3bがあり、導電体４は導電体4aと非導電体4bとの重合体
からなっている。５は導電体4aと金属ケース3aを接着す
る導電性接着剤であり、導電体4aは導電性接着剤５、金
属ケース3aを通じて接地されている。６は検出器１に挿
入された指尖であり、７は受光体3bの電気信号を処理す
る処理部、８は処理部７からの出力により脈波を記録，
表示する表示部である。Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings. In the figure, reference numeral 1 is a detector for detecting an increase / decrease in blood volume of a fingertip or an earlobe based on the degree of light transmission. . The light receiver 3 is a grounded metal case 3a with a light receiver
3b, and the conductor 4 is made of a polymer of a conductor 4a and a non-conductor 4b. Reference numeral 5 is a conductive adhesive that bonds the conductor 4a and the metal case 3a, and the conductor 4a is grounded through the conductive adhesive 5 and the metal case 3a. 6 is a fingertip inserted into the detector 1, 7 is a processing unit for processing the electric signal of the photoconductor 3b, 8 is a pulse wave recorded by the output from the processing unit 7,
It is a display unit for displaying.
上記構成においてその動作を説明すると、光源２から出
た光は指尖６を通過して、さらに導電体４を通過して金
属ケース3aの指尖６に対向する位置に設けた開口部を通
って受光部3bに至り、それに応じた電気信号を発生す
る。生じた電気信号は処理部７で処理され、脈波として
表示部８で表示，記録される。この時、人体を介して、
あるいは直接、受光部３にのってくる浮遊ノイズは指尖
から導電体４の導電部4aに乗り、導電性接着剤５、金属
ケース3aを通ってアースされる。すなわち、受光部3bは
シールドされていることになり、受光部3bに生ずる電気
信号は浮遊ノイズのないものとなる。したがって処理部
７にはフィルター回路などがほとんど必要なくなり、極
めて簡単なものとなる。The operation of the above configuration will be described. Light emitted from the light source 2 passes through the fingertip 6 and further passes through the conductor 4 and an opening provided at a position facing the fingertip 6 of the metal case 3a. To reach the light receiving portion 3b, and generate an electric signal in accordance therewith. The generated electric signal is processed by the processing unit 7, and is displayed and recorded as a pulse wave on the display unit 8. At this time, through the human body,
Alternatively, the stray noise that directly reaches the light receiving portion 3 travels from the fingertip to the conductive portion 4a of the conductor 4, passes through the conductive adhesive 5, and the metal case 3a and is grounded. That is, the light receiving portion 3b is shielded, and the electric signal generated in the light receiving portion 3b has no stray noise. Therefore, the processing unit 7 hardly requires a filter circuit or the like, which is extremely simple.
なお、導電体４は開口部の大きい金属メッシュなどでも
良いが、導電体4aが露出していると、指尖等にふれるこ
ともあるので、指尖側は絶縁されていることが望まれる
ため非導電体4bとしている。そして、導電体４はフィル
ム状のものであり、光透過度のよいものを採用してい
る。Note that the conductor 4 may be a metal mesh having a large opening or the like, but if the conductor 4a is exposed, it may touch the fingertip or the like, so it is desirable that the fingertip side is insulated. The non-conductor 4b is used. The conductor 4 is in the form of a film and has a high light transmittance.
発明の効果 以上のように本発明によれば指尖に対向する受光器の前
面に光透過性の導電体を設け、これを接地したため光電
式脈波の検出器そのものをシールドすることができ、浮
遊ノイズの影響を確実に取り除くことができ、脈波の処
理回路が極めて簡単で正確な測定が可能となるものであ
る。また、光透過性の導電体を、導電体と非導電体の重
合体で構成したことにより、指尖との間の絶縁性を確保
することができ、安全な脈波検出が行えるようになる。As described above, according to the present invention, a light-transmissive conductor is provided on the front surface of the light receiver facing the fingertip, and the detector of the photoelectric pulse wave itself can be shielded because it is grounded, The influence of stray noise can be reliably removed, and the pulse wave processing circuit becomes extremely simple and accurate can be measured. In addition, since the light-transmissive conductor is composed of a polymer of a conductor and a non-conductor, insulation between the fingertip and the fingertip can be secured, and safe pulse wave detection can be performed. .
図は本発明の一実施例を示す検出器の断面図である。 １……検出器、２……光源、３……受光器、４……導電
体。FIG. 1 is a sectional view of a detector showing an embodiment of the present invention. 1 ... Detector, 2 ... Light source, 3 ... Photoreceiver, 4 ... Conductor.
Claims (2)
によって検出する光源および受光器を備え、前記受光器
の前面には光透過性の導電体を設け、この導電体を接地
してなる光電式脈波検出器。1. A light source and a light receiver for detecting an increase / decrease in blood volume of a fingertip or an earlobe based on light transmittance, and a light-transmissive conductor is provided on the front surface of the light receiver, and the conductor is grounded. Photoelectric pulse wave detector.
重合して構成した特許請求の範囲第１項記載の光電式脈
波検出器。2. A photoelectric pulse wave detector according to claim 1, wherein the light-transmissive conductor is formed by superposing a conductor and a non-conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2881287A JPH0712348B2 (en) | 1987-02-10 | 1987-02-10 | Photoelectric pulse wave detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2881287A JPH0712348B2 (en) | 1987-02-10 | 1987-02-10 | Photoelectric pulse wave detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63194638A JPS63194638A (en) | 1988-08-11 |
| JPH0712348B2 true JPH0712348B2 (en) | 1995-02-15 |
Family
ID=12258821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2881287A Expired - Lifetime JPH0712348B2 (en) | 1987-02-10 | 1987-02-10 | Photoelectric pulse wave detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0712348B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017110291A1 (en) * | 2015-12-22 | 2017-06-29 | 京セラ株式会社 | Measuring sensor package and measuring sensor |
-
1987
- 1987-02-10 JP JP2881287A patent/JPH0712348B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63194638A (en) | 1988-08-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |