JP2964293B2 - Pulse wave detector - Google Patents
Pulse wave detectorInfo
- Publication number
- JP2964293B2 JP2964293B2 JP5044329A JP4432993A JP2964293B2 JP 2964293 B2 JP2964293 B2 JP 2964293B2 JP 5044329 A JP5044329 A JP 5044329A JP 4432993 A JP4432993 A JP 4432993A JP 2964293 B2 JP2964293 B2 JP 2964293B2
- Authority
- JP
- Japan
- Prior art keywords
- pulse wave
- phototransistor
- resistor
- impedance
- 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 - Fee Related
Links
- 239000003990 capacitor Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 230000000638 stimulation Effects 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Landscapes
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Electrotherapy Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は脈波より特定区間を検出
し、該特定区間上で電気刺激を出力する電気刺激装置な
どに用いられる脈波検出装置に関する。The present invention relates to detect certain interval from the pulse wave, the electric stimulation device I for outputting an electrical stimulation on the specific section
The present invention relates to a pulse wave detection device used for such devices .
【０００２】[0002]
【従来の技術】常時、脈波を検出し、この脈波信号から
特定区間主に拡張期間を検出し、この特定区間上で電気
刺激を出力し、この出力を腹部へ長時間加えることによ
って、血行促進並びに痩身効果を著しく行わしめる装置
が提案された。脈波の検出手段としては、様々な様式が
採用されているが、その中でもＬＥＤとフォトトランジ
スタの組み合わせによる光透過乃至反射型の手段が生体
の検出部位を選べば、比較的正確で簡単に脈波を検出で
きる点で好適である。2. Description of the Related Art By constantly detecting a pulse wave, detecting an expansion period mainly from a specific section from this pulse wave signal, outputting electrical stimulation on the specific section, and applying this output to the abdomen for a long time, Devices have been proposed that significantly enhance blood circulation and slimming effects. Various methods are used for detecting the pulse wave. Among them, if a light transmission or reflection type means using a combination of an LED and a phototransistor selects a detection part of a living body, the pulse wave is relatively accurate and simple. This is preferable in that waves can be detected.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、ＬＥＤ
とフォトトランジスタによる光透過型あるいは、光反射
型方式にあっては、皮膚の色等によって透過又は反射し
た光が減衰してしまい、脈波形の正確な検出が困難とな
り、後段に設けられた特定区間の分析、電気刺激の出力
する為の機能も不正確となった。又、透過乃至反射して
くる光の量が多すぎる場合、フォトトランジスタや増幅
器の出力が飽和してしまう為に、やはり脈波形の検出が
困難となった。しかしこの様な課題は、光電変換方式に
限らず圧電変換の方式等でも、同様のことが言えた。SUMMARY OF THE INVENTION However, LEDs
In the case of the light transmission type or the light reflection type using a phototransistor, the transmitted or reflected light is attenuated due to the color of the skin, etc., making it difficult to accurately detect the pulse waveform. Section analysis and the function for outputting electrical stimulation were also inaccurate. Also, when the amount of transmitted or reflected light is too large, the output of the phototransistor or the amplifier is saturated, which also makes it difficult to detect the pulse waveform. However, such a problem is not limited to the photoelectric conversion method, and the same can be said for a piezoelectric conversion method and the like.
【０００４】[0004]
【課題を解決するための手段】上記に鑑み本発明は、脈
波電気信号あるいは増幅した脈波電気信号を生成する
際、脈波電気信号の増幅量が、もし過大であれば、減少
方向へ、過小であれば増加方向へ脈波センサを構成する
フォトトランジスタの電源電流を調整することにより、
膚色等の外部要因に左右されることなく、常に安定した
脈波電気信号を得ることができる脈波検出装置を実現し
た。SUMMARY OF THE INVENTION In view of the above, the present invention relates to a method for generating a pulse wave electric signal or an amplified pulse wave electric signal , in which if the amplification amount of the pulse wave electric signal is excessive, it is reduced.
Configure the pulse wave sensor in the direction and, if too small, in the increasing direction
By adjusting the power supply current of the phototransistor ,
A pulse wave detector that can always obtain a stable pulse wave electric signal without being affected by external factors such as skin color has been realized.
【０００５】[0005]
【実施例】図１に示す実施例を示し説明する。(11)は、
ＬＥＤであり、上述したものと同一のものである。(12)
は、フォトトランジスタであり、ＬＥＤ(11)と同様上述
したものと同一である。(11)と(12)が脈波センサを構成
する。(13)(15)(17)は抵抗で、(16)(18)はコンデンサで
ある。(14)はＰチャネル型ＦＥＴである。(19)は電池で
あり、(20)はオペアンプである。オペアンプ(20)はアク
ティブフィルタ、増幅器等を構成する。ＬＥＤ(11)のア
ノードは抵抗を介して、電池(19)の(＋)側に、カソード
は電池(19)の(−)側に接続する。尚、電池(19)の(−)側
を接地として表現している。フォトトランジスタ(12)の
コレクタは抵抗(13)の一端と接続し、抵抗(13)の他端
は、ＦＥＴ(14)のドレイン、抵抗(15)(17)の一端、コン
デンサ(18)の一端、及びオペアンプ(20)の一入力端に接
続する。ＦＥＴ(14)のゲートには、抵抗(15)の他端、コ
ンデンサ(16)の一端が接続し、ＦＥＴ(14)のソースに
は、電池(19)の(＋)極が接続する。コンデンサ(16)の他
端、抵抗(17)の他端には、電池(19)の(＋)極が接続す
る。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIG. 1 will be described. (11)
LEDs, which are the same as those described above. (12)
Is a phototransistor, similar to the LED (11)
It is the same as what was done. (11) and (12) constitute the pulse wave sensor
I do. (13) (15) (17) are resistors, (16) (18) are capacitors
is there. (14) is a P-channel type FET. (19) is the battery
Yes, (20) is an operational amplifier. The operational amplifier (20)
The active filter and the amplifier are configured. LED (11)
The node is connected to the (+) side of the battery (19) via a resistor
Is connected to the (−) side of the battery (19). In addition, the (-) side of the battery (19)
Is expressed as grounding. Phototransistor (12)
The collector is connected to one end of the resistor (13), and the other end of the resistor (13)
Is the drain of the FET (14), one end of the resistors (15) and (17),
Connected to one end of the capacitor (18) and one input of the operational amplifier (20).
Continue. The other end of the resistor (15) is connected to the gate of the FET (14).
One end of the capacitor (16) is connected to the source of the FET (14).
Is connected to the (+) pole of the battery (19). Other capacitors (16)
The other end of the resistor (17) is connected to the (+) pole of the battery (19).
You.
【０００６】次に動作を説明する。人体の被測定部位にNext, the operation will be described. On the measured part of the human body
ＬＥＤ(11)とフォトトランジスタ(12)からなる脈波センPulse wave sensor consisting of LED (11) and phototransistor (12)
サSa
が装着される。ＬＥＤ(11)が出力する赤外線等の光線Is attached. Light rays such as infrared rays output by LED (11)
は人体を通過乃至反射することによって光量などが変化Changes the amount of light as it passes or reflects through the human body
する。この変化した光線は、フォトトランジスタ(12)にI do. This changed light is transmitted to the phototransistor (12).
収拾される。フォトトランジスタ(12)は、入力光量に応Will be recovered. The phototransistor (12) responds to the input light
じてコレクタエミッタ間のインピーダンスを変化させるThe impedance between the collector and emitter
。この時フォトトランジスタ(12)の入力光量が過多と . At this time, if the input light amount of the phototransistor (12) is excessive,
なると、コレクタエミッタ間のインピーダンスが低下すThe impedance between the collector and emitter decreases.
る。コレクタエミッタ間のインピーダンスが低下するYou. Impedance between collector and emitter decreases
と、ＦＥＴ(14)のゲート電圧が低下し、ＦＥＴのドレイAnd the gate voltage of the FET (14) drops,
ンソース間のインピーダンスが高くなる。ドレインソーSource-to-source impedance increases. Drain saw
ス間のインピーダンスが高なると、フォトトランジスタWhen the impedance between the transistors increases, the phototransistor
(12)へ供給する電流が規制され増幅量が低下する。逆にThe current supplied to (12) is regulated, and the amount of amplification decreases. vice versa
フォトトランジスタ(12)に対する入力光量が減少するとWhen the input light quantity to the phototransistor (12) decreases
コレクタエミッタ間のインピーダンスが高くなり、ＦＥThe impedance between the collector and the emitter increases, and the FE
Ｔ(14)のゲート電圧が上昇するため、ＦＥＴ(14)のドレSince the gate voltage of T (14) rises, the drain of FET (14)
インソース間のインピーダンスが下がり、フォトトランThe impedance between the in-sources decreases,
ジスタ(12)へ供給する電流が増加し、増幅量が上昇すThe current supplied to the resistor (12) increases, and the amount of amplification increases
る。この様にフォトトランジスタ(12)が入力する光量にYou. In this way, the amount of light input by the phototransistor (12)
応じてフォトトランジスタ(12)へ流す電流を変化させるChange the current flowing to the phototransistor (12) accordingly
実施例は、非常にコンパクトな構成をとることができ、Embodiments can take a very compact configuration,
しかも増幅率の制御も正確に行える等、実用上極めて好In addition, the amplification rate can be controlled accurately, and
ましい一例である。This is a good example.
【０００７】[0007]
【発明の効果】以上、詳述の如く本発明によれば、皮膚
の色等による脈波検出が不安定となることを解消し、脈
波信号を常に安定して且つ正確に検出でき、脈波信号中
からの拡張期の検出、並びに電気刺激の正確なタイミン
グも可能とする等の効果を有する。As described above, according to the present invention, pulse wave detection due to skin color and the like can be prevented from becoming unstable, and a pulse wave signal can always be detected stably and accurately. This has effects such as detection of diastole from the wave signal and accurate timing of electrical stimulation.
【図１】 本発明の実施例を示す図。FIG. 1 is a diagram showing an embodiment of the present invention.
【符号の説明】11 ＬＥＤ 12 フォトトランジスタ 13 抵抗器 14 ＦＥＴ 15 抵抗 16 コンデンサ 17 抵抗 18 コンデンサ 19 電池 20 オペアンプ [Description of Signs] 11 LED 12 Phototransistor 13 Resistor 14 FET 15 Resistor 16 Capacitor 17 Resistor 18 Capacitor 19 Battery 20 Operational amplifier
Claims (1)
波検出部、前記フォトトランジスタのコレクタエミッタ
間のインピーダンスに基づき、当該フォトトランジスタ
へ供給される電源電流を調整する手段を有する脈波検出
装置。1. A pulse wave detecting apparatus comprising: a pulse wave detecting section having a phototransistor in a light receiving section; and means for adjusting a power supply current supplied to the phototransistor based on an impedance between a collector and an emitter of the phototransistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5044329A JP2964293B2 (en) | 1993-02-10 | 1993-02-10 | Pulse wave detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5044329A JP2964293B2 (en) | 1993-02-10 | 1993-02-10 | Pulse wave detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06233827A JPH06233827A (en) | 1994-08-23 |
| JP2964293B2 true JP2964293B2 (en) | 1999-10-18 |
Family
ID=12688474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5044329A Expired - Fee Related JP2964293B2 (en) | 1993-02-10 | 1993-02-10 | Pulse wave detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2964293B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5889240A (en) * | 1981-11-20 | 1983-05-27 | 松下電工株式会社 | Circuit for detecting pulse |
| JPS62197036A (en) * | 1986-02-26 | 1987-08-31 | 松下電器産業株式会社 | accelerometer plethysmometer |
| JPH069618B2 (en) * | 1989-02-01 | 1994-02-09 | 株式会社アドバンス | Electrical stimulator |
-
1993
- 1993-02-10 JP JP5044329A patent/JP2964293B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06233827A (en) | 1994-08-23 |
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