JPH05277080A - Bioelectric phenomenon detector - Google Patents
Bioelectric phenomenon detectorInfo
- Publication number
- JPH05277080A JPH05277080A JP4108642A JP10864292A JPH05277080A JP H05277080 A JPH05277080 A JP H05277080A JP 4108642 A JP4108642 A JP 4108642A JP 10864292 A JP10864292 A JP 10864292A JP H05277080 A JPH05277080 A JP H05277080A
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- differential amplifier
- living body
- dummy
- potential
- 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.)
- Granted
Links
- 238000012937 correction Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 230000010287 polarization Effects 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- GTKRFUAGOKINCA-UHFFFAOYSA-M chlorosilver;silver Chemical compound [Ag].[Ag]Cl GTKRFUAGOKINCA-UHFFFAOYSA-M 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 210000004556 brain Anatomy 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000003183 myoelectrical effect Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 210000004761 scalp Anatomy 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、脳波、筋電位、その他
の直流または超低周波の生体電気現象を検出する場合に
おいて、電極に発生する不要な電位の悪影響を除去する
ようにした生体電気現象検出装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to bioelectricity for eliminating adverse effects of unnecessary electric potentials generated in electrodes when detecting electroencephalograms, myoelectric potentials, and other bioelectrical phenomena of direct current or ultra-low frequency. The present invention relates to a phenomenon detection device.
【０００２】[0002]
【従来の技術】脳波を検出するための電極には、図５に
示すような生体電気検出用電極１０が最も広く使用され
てきている。この電極１０は、皿状の銀塩化銀電極部１
１を下面が開口したケース１４で包囲し、リード線１２
を外部へ導出したもので、生体１６に取付けるときに
は、ペースト１３を介在し、両面粘着カラー１５で固定
するなどの方法が取られている。2. Description of the Related Art A bioelectric detection electrode 10 as shown in FIG. 5 has been most widely used as an electrode for detecting an electroencephalogram. This electrode 10 is a dish-shaped silver-silver chloride electrode part 1
1 is surrounded by a case 14 having an opened lower surface, and the lead wire 12
When it is attached to the living body 16, the paste 13 is interposed and the double-sided adhesive collar 15 is used for fixing.
【０００３】脳波は、その信号レベルが数μＶ〜３００
μＶ程度の極めて小さな信号であり、これを検出すると
きに最もやっかいなのは、電極１０の取付けである。電
極１０の取付けが安定していないと、ノイズや筋電位が
混入して正確な測定をすることができない。電極１０の
取付け位置には、種々の方法があるが、現在最も多く使
われているのは、図４に示すような国際脳波学会が標準
法として認めているモントリオール法である。このよう
に多数の電極１０を頭皮上に取付け、図６の双極法、ま
たは、図７の単極法にて、電極間の電位変化を多チャン
ネル同時計測をする。The electroencephalogram has a signal level of several μV to 300 μV.
An extremely small signal of the order of μV, and the most troublesome when detecting this is the attachment of the electrode 10. If the attachment of the electrode 10 is not stable, noise and myoelectric potential are mixed and accurate measurement cannot be performed. There are various methods for attaching the electrode 10, but the most widely used at present is the Montreal method, which is recognized as a standard method by the International EEG Society as shown in FIG. In this way, a large number of electrodes 10 are mounted on the scalp, and the potential change between the electrodes is simultaneously measured on multiple channels by the bipolar method shown in FIG. 6 or the monopolar method shown in FIG.
【０００４】脳波は、頭皮上に電極１０をペースト１３
を介して装着して測定するが、この脳波は、一般的に１
〜４Ｈｚ帯域（δ波）、４〜８Ｈｚ帯域（θ波）、８〜
１２Ｈｚ帯域（α波）、１２〜２５Ｈｚ帯域（β波）と
分類して論じられてきた。そのため、従来は、測定電極
間に発生した直流成分は、銀塩化銀電極部１１とペース
ト１３との間に発生した分極電圧と考え、ＣＲ増幅器を
用いて直流または超低周波成分を除去していた。The electroencephalogram is obtained by pasting the electrode 10 on the scalp 13
The brain wave is generally 1
~ 4 Hz band (δ wave), 4 ~ 8 Hz band (θ wave), 8 ~
It has been categorized and discussed as the 12 Hz band (α wave) and the 12 to 25 Hz band (β wave). Therefore, conventionally, the direct current component generated between the measurement electrodes is considered to be the polarization voltage generated between the silver-silver chloride electrode portion 11 and the paste 13, and the direct current or the super low frequency component is removed by using a CR amplifier. It was
【０００５】しかるに、近年、コンピュータ技術が普及
するにつれ、その研究内容が脳波成分中の１Ｈｚ以下の
帯域、すなわち、超低周波帯であるδ0領域にもおよ
び、かつδ0帯域にも有効な生体情報成分の存在が論じ
られるに至った。そのためには、増幅器の帯域を交流増
幅器（ＣＲ）のまま、その時定数を大きくするのみでな
く、積極的に直流増幅器化することが考えられている。However, as computer technology has become widespread in recent years, the content of research is effective not only in the band of 1 Hz or less in the electroencephalogram component, that is, in the δ 0 region, which is an extremely low frequency band, and also in the δ 0 band. The existence of bioinformation components has been discussed. For that purpose, it is considered that not only the time constant is increased while the band of the amplifier remains the AC amplifier (CR) but the amplifier is positively converted to the DC amplifier.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、生体電
気現象検出は、前述のように、電極を生体に装着して計
測するが、電極自体が電池であり、絶対ゼロ電位の電極
は存在せず、かつ、各電極の電池電圧は個別差を有して
いる。直流成分の生体電気現象の検出には、電極電池電
圧が存在しても変動なく安定であることが条件で、その
ための工夫は種々実施されているが、生体電位計測を完
全に実施するためには、ここの電極電池電圧を補正して
肝心の脳波そのものを測定する必要がある。この場合、
δ0波を分極電圧として除去すると、肝心の脳波情報を
測定することができないという問題があった。However, as described above, bioelectric phenomenon detection is performed by mounting electrodes on a living body, but the electrodes themselves are batteries, and there are no electrodes of absolute zero potential. In addition, the battery voltage of each electrode has an individual difference. The detection of the bioelectric phenomenon of the direct current component is required to be stable without fluctuation even if the electrode battery voltage is present, and various measures have been taken to achieve it. , It is necessary to correct the electrode battery voltage here and measure the essential EEG itself. in this case,
If the δ 0 wave is removed as a polarization voltage, there is a problem that the essential EEG information cannot be measured.
【０００７】本発明は、生体電気現象の中で極めて重要
なδ0波を正確に測定するために、直流増幅方式により
構成される脳波計などの生体電気現象計測装置におい
て、生体電気現象計測の前に個別の電極電池電圧を、ダ
ミー生体を用いて計測し、電極電池電圧差を予め補正
し、その後、生体電気現象を計測することにより生体の
直流成分より計測可能とする補正装置を提供することを
目的とするものである。In order to accurately measure the δ 0 wave, which is extremely important in bioelectric phenomena, the present invention provides a bioelectric phenomenon measuring device such as an electroencephalograph configured by a direct current amplification method. Provided is a correction device capable of measuring an individual electrode battery voltage using a dummy living body, correcting the electrode battery voltage difference in advance, and then measuring a bioelectric phenomenon from a DC component of the living body. The purpose is that.
【０００８】[0008]
【課題を解決するための手段】本発明は、複数の生体電
気検出用電極１０を装着するダミー生体２０と、このダ
ミー生体２０に装着された対をなす電極１０間の電位差
を検出して所定の電圧に補正する補正手段とからなり、
この補正手段は、ダミー生体２０に装着された対をなす
電極１０間の電位差を検出する第１の差動増幅器３１
と、この第１の差動増幅器３１の出力と補正回路３５か
ら帰還された出力との電位差を検出する第２の差動増幅
器３２と、順次出力電位を変化せしめて、前記第１の差
動増幅器３１の出力電位と所定の関係値に達したとき固
定的な電圧を出力する補正回路３５とを具備してなるこ
とを特徴とする生体電気現象検出用電極の補正装置であ
る。According to the present invention, a predetermined potential is detected by detecting a potential difference between a dummy living body 20 on which a plurality of bioelectricity detecting electrodes 10 are mounted and a pair of electrodes 10 mounted on the dummy living body 20. Compensation means for compensating to the voltage of
This correction means is a first differential amplifier 31 for detecting a potential difference between the pair of electrodes 10 mounted on the dummy living body 20.
A second differential amplifier 32 for detecting a potential difference between the output of the first differential amplifier 31 and the output fed back from the correction circuit 35, and the first differential amplifier 32 for sequentially changing the output potential. A correction device for a bioelectric phenomenon detection electrode, comprising: a correction circuit 35 that outputs a fixed voltage when the output potential of the amplifier 31 reaches a predetermined relational value.
【０００９】[0009]
【作用】（１）ペースト１３を塗布して電極１０をダミ
ー生体２０に装着する。 （２）各電極１０とペースト１３の間で発生した分極電
圧が、第１の差動増幅器３１へ送られる。 （３）電極１０で発生した電位差は、第１の差動増幅器
３１で正または負の電位として出力し、第２の差動増幅
器３２の一方へ入力する。 （４）調整のためのトリガ信号によってカウンタ３９の
データをすべてクリアするとともに、発振器３８の発振
を開始させ、クロック信号をカウンタ３９にてカウント
する。(1) The paste 13 is applied and the electrode 10 is attached to the dummy living body 20. (2) The polarization voltage generated between each electrode 10 and the paste 13 is sent to the first differential amplifier 31. (3) The potential difference generated at the electrode 10 is output as a positive or negative potential by the first differential amplifier 31 and input to one of the second differential amplifiers 32. (4) All the data of the counter 39 is cleared by the trigger signal for adjustment, the oscillation of the oscillator 38 is started, and the clock signal is counted by the counter 39.
【００１０】（５）カウンタ３９の徐々にカウントアッ
プするディジタル信号がアナログ値に変換されて第２の
差動増幅器３２の他方に入力する。 （６）第２の差動増幅器３２では、第１の差動増幅器３
１とＤ／Ａ変換器４０の出力との差を検出して、増幅器
３３で増幅する。 （７）この増幅器３３の差の出力は、比較器３６で０電
位と比較され、増幅器３３の出力が０電位になると、フ
リップフロップ回路３７をリセットし、Ｄ／Ａ変換器４
０の出力は、そのまま保持した状態となる。 （８）このようにして各電極１０の分極電位を補正した
後、ダミー生体２０から外して生体１６に装着して測定
する。(5) The digital signal that is gradually counted up by the counter 39 is converted into an analog value and input to the other of the second differential amplifiers 32. (6) In the second differential amplifier 32, the first differential amplifier 3
The difference between 1 and the output of the D / A converter 40 is detected and amplified by the amplifier 33. (7) The difference output of the amplifier 33 is compared with 0 potential by the comparator 36, and when the output of the amplifier 33 becomes 0 potential, the flip-flop circuit 37 is reset and the D / A converter 4
The output of 0 is kept as it is. (8) After the polarization potential of each electrode 10 is corrected in this way, it is detached from the dummy living body 20 and mounted on the living body 16 for measurement.
【００１１】[0011]
【実施例】以下、本発明の一実施例を図面に基づき説明
する。２０は、ダミー生体で、このダミー生体２０は、
頭部と同様の形状となるような絶縁体芯材に、その表面
にやはり絶縁体の吸湿性物質で被覆し、生体と同様の性
質を有するような生理食塩水、グレブス液などを含浸さ
せたものである。ヘルメット状の電極ホルダー１８の内
側には、多数の生体電気検出用電極１０が取付けられて
いる。これらの電極１０は、銀塩化銀などの高安定性を
有するものからなり、前述した図４の取付け位置に対応
しており、顎バンドなどでペースト１３を介してダミー
生体２０の表面に密着させて装着される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 20 is a dummy living body, and this dummy living body 20 is
An insulator core material with a shape similar to that of the head was coated with a hygroscopic substance that is also an insulator on its surface, and was impregnated with physiological saline or Grubb's solution having the same properties as those of the living body. It is a thing. A large number of bioelectric detection electrodes 10 are attached to the inside of the helmet-shaped electrode holder 18. These electrodes 10 are made of a material having high stability such as silver-silver chloride, and correspond to the mounting position of FIG. 4 described above. Be installed.
【００１２】例えば、図６の双極法で測定するものとす
ると、左脳と右脳との中心線に対する左右対称点の生体
電気検出用電極１０を１対とする。具体的には、Ｆｐ１
とＦｐ２、Ｆ３とＦ４、Ｆ７とＦ８、Ｃ３とＣ４、Ｔ３
とＴ４、Ｐ３とＰ４、Ｔ５とＴ６、Ｏ１とＯ２とが対を
なす。なお、Ａ１とＡ２は不関電極である。For example, if the measurement is performed by the bipolar method shown in FIG. 6, a pair of bioelectric detection electrodes 10 at left and right symmetry points with respect to the center lines of the left and right brains are used. Specifically, Fp1
And Fp2, F3 and F4, F7 and F8, C3 and C4, T3
And T4, P3 and P4, T5 and T6, and O1 and O2 form a pair. A1 and A2 are indifferent electrodes.
【００１３】前記各１対と不関電極Ａ１（またはＡ２）
とは、第１チャンネル補正手段３０ａから第ｎチャンネ
ル補正手段３０ｎまでの第１の差動増幅器３１にそれぞ
れ接続される。各第１の差動増幅器３１は、第２の差動
増幅器３２、多段の増幅器３３を介して出力端子３４に
接続されるとともに、補正回路３５に接続される。この
補正回路３５は、比較器３６、フリップフロップ回路３
７、発振器３８を介してカウンタ３９に接続され、この
カウンタ３９は、Ｄ／Ａ変換器４０を介して前記第２の
差動増幅器３２の他方の出力側に接続されている。Each pair and the indifferent electrode A1 (or A2)
Are respectively connected to the first differential amplifiers 31 from the first channel correction means 30a to the nth channel correction means 30n. Each first differential amplifier 31 is connected to the output terminal 34 via the second differential amplifier 32 and the multistage amplifier 33, and is also connected to the correction circuit 35. The correction circuit 35 includes a comparator 36 and a flip-flop circuit 3.
7. A counter 39 is connected via an oscillator 38, and the counter 39 is connected to the other output side of the second differential amplifier 32 via a D / A converter 40.
【００１４】以上のような構成おける動作を説明する。 （１）ヘルメット状電極ホルダー１８に取付けられた電
極１０を、ペースト１３を塗布してダミー生体２０に被
せ、脳波検出と同一状態に装着する。 （２）電極１０では、銀塩化銀などの電極部１１とペー
スト１３との間にブラウン現象にて分極電圧が発生し、
この電圧が第１の差動増幅器３１へ送られる。The operation of the above configuration will be described. (1) The electrode 10 attached to the helmet-shaped electrode holder 18 is coated with the paste 13 and covered with the dummy living body 20, and is mounted in the same state as the brain wave detection. (2) In the electrode 10, a polarization voltage is generated by the Brown phenomenon between the electrode portion 11 such as silver-silver chloride and the paste 13,
This voltage is sent to the first differential amplifier 31.
【００１５】（３）ここで、Ｐ３に装着された電極１０
とＰ４に装着された電極１０とは、電極の状態、ペース
ト１３の塗布状態等で違いが生じ、全く同一の電位が発
生することはありえないので、Ｐ３とＰ４の電極１０で
発生した電位差は、第１の差動増幅器３１で正または負
の電位として出力し、第２の差動増幅器３２の一方へ入
力する。 （４）第１チャンネル補正手段３０ａのトリガ入力端子
４１に外部から調整のためのトリガ信号を入力する。(3) Here, the electrode 10 attached to P3
Since the electrodes 10 mounted on P4 and P4 are different from each other in the state of the electrodes, the coating state of the paste 13, and the like, the same potential cannot be generated. Therefore, the potential difference generated between the electrodes 10 of P3 and P4 is The first differential amplifier 31 outputs it as a positive or negative potential and inputs it to one of the second differential amplifiers 32. (4) A trigger signal for adjustment is externally input to the trigger input terminal 41 of the first channel correction means 30a.
【００１６】（５）このトリガ信号によってカウンタ３
９のデータをすべてクリアするとともに、フリップフロ
ップ回路３７のセット端子に入力して発振器３８の発振
を開始させ、クロック信号をカウンタ３９に送り、新た
にカウントを開始する。 （６）カウンタ３９の徐々にカウントアップするディジ
タル信号がＤ／Ａ変換器４０でアナログ値に変換され
て、第２の差動増幅器３２の他方に入力する。この場
合、Ｄ／Ａ変換器４０の出力は、１対の電極間に発生す
る電位より負側に充分大きな電位、例えば−５００ｍＶ
から正側に次第に増加するものとする。(5) The counter 3 is activated by this trigger signal.
While clearing all the data of 9, the data is input to the set terminal of the flip-flop circuit 37 to start the oscillation of the oscillator 38, the clock signal is sent to the counter 39, and the counting is newly started. (6) The digital signal of the counter 39 which is gradually counted up is converted into an analog value by the D / A converter 40 and input to the other of the second differential amplifiers 32. In this case, the output of the D / A converter 40 is a potential sufficiently larger on the negative side than the potential generated between the pair of electrodes, for example, -500 mV.
From the positive side to the positive side.
【００１７】（７）第２の差動増幅器３２では、第１の
差動増幅器３１とＤ／Ａ変換器４０の出力との差を検出
して、増幅器３３で増幅する。 （８）この差の出力は、比較器３６へ送られる。そし
て、この比較器３６で０電位と比較し、増幅器３３の出
力も０電位になると、比較器３６から出力があらわれ
て、フリップフロップ回路３７をリセットする。このと
き、Ｄ／Ａ変換器４０の出力は、そのときの出力電圧の
まま保持した状態となる。(7) The second differential amplifier 32 detects the difference between the first differential amplifier 31 and the output of the D / A converter 40, and the amplifier 33 amplifies the difference. (8) The output of this difference is sent to the comparator 36. Then, the comparator 36 compares with 0 potential, and when the output of the amplifier 33 also becomes 0 potential, an output appears from the comparator 36 to reset the flip-flop circuit 37. At this time, the output of the D / A converter 40 is kept at the output voltage at that time.
【００１８】（９）第２チャンネル補正手段３０ｂから
第ｎチャンネル補正手段３０ｎまでも同時に、または、
順次、同様の動作が行なわれる。 （１０）このようにして各電極の分極電位を補正した
後、ダミー生体２０から外して生体に装着して測定す
る。(9) From the second channel correcting means 30b to the nth channel correcting means 30n at the same time, or
Similar operations are sequentially performed. (10) After the polarization potential of each electrode is corrected in this manner, the electrode is removed from the dummy living body 20 and mounted on the living body for measurement.
【００１９】前記実施例では、補正手段３０ａないし３
０ｎは、補正回路３５により自動的に補正するようにし
たが、これに限られるものではなく、この補正回路３５
は、手動によりボリュームのつまみを回動して補正する
ものであってもよい。前記実施例では、電極１０をヘル
メット状電極ホルダー１８に装着したままで補正できる
ようにするため、ダミー生体２０を頭部と同様の形状と
したが、これに限られるものではなく、図３に示すよう
に、電極１０の数が少ない場合には、ヘルメット状電極
ホルダー１８から外して筐体２１に設けたダミー生体２
０に１個ずつ並べて１対毎に組み合わせて調整するよう
にしてもよい。In the above embodiment, the correction means 30a to 3
0n is automatically corrected by the correction circuit 35, but the present invention is not limited to this.
Alternatively, the knob of the volume may be manually rotated for correction. In the above-described embodiment, the dummy living body 20 has the same shape as the head so that the electrode 10 can be corrected while being attached to the helmet-shaped electrode holder 18. However, the shape of the dummy living body 20 is not limited to this. As shown, when the number of electrodes 10 is small, the dummy living body 2 removed from the helmet-shaped electrode holder 18 and provided in the housing 21
It is also possible to arrange them one by one and adjust them by combining them one by one.
【００２０】前記実施例では、双極法の場合について説
明したが、単極法の場合でも同様である。前記実施例で
は、脳波検出用電極の場合について説明したが、その他
の生体電気現象検出用電極の場合でも同様である。In the above embodiment, the case of the bipolar method has been described, but the same applies to the case of the unipolar method. In the above-described embodiment, the case of the electroencephalogram detection electrode has been described, but the same applies to the case of other bioelectric phenomenon detection electrodes.
【００２１】[0021]
【発明の効果】本発明は、複数の生体電気検出用電極１
０を装着するダミー生体２０と、このダミー生体２０に
装着された対をなす電極１０間の電位差を検出して所定
の電圧に補正する補正手段とを具備してなるので、最近
注目されてきている直流または超低周波信号が正確に検
出できるとともに、多数の生体電気検出用電極１０が有
する固有の分極電位を簡単に調整できるものである。INDUSTRIAL APPLICABILITY The present invention has a plurality of bioelectrical detection electrodes 1.
Since it is equipped with a dummy living body 20 to which 0 is attached and a correction unit that detects a potential difference between the pair of electrodes 10 attached to the dummy living body 20 and corrects it to a predetermined voltage, it has recently been noticed. It is possible to accurately detect a direct current or an ultra-low frequency signal that is present and to easily adjust the peculiar polarization potential of many bioelectric detection electrodes 10.
【図１】本発明による生体電気現象検出装置の一実施例
を示す電気回路図である。FIG. 1 is an electric circuit diagram showing an embodiment of a bioelectrical phenomenon detection device according to the present invention.
【図２】ダミー生体への電極の装着状態を示す説明図で
ある。FIG. 2 is an explanatory diagram showing a state in which electrodes are attached to a dummy living body.
【図３】ダミー生体の他の例を示す断面図である。FIG. 3 is a cross-sectional view showing another example of a dummy living body.
【図４】電極の装着方法の説明図である。FIG. 4 is an explanatory diagram of a method of mounting electrodes.
【図５】皿状電極の断面図である。FIG. 5 is a cross-sectional view of a dish-shaped electrode.
【図６】双極法の説明図である。FIG. 6 is an explanatory diagram of a bipolar method.
【図７】単極法の説明図である。FIG. 7 is an explanatory diagram of a monopolar method.
１０…生体電気検出用電極、１１…銀塩化銀などの電極
部、１２…リード線、１３…ペースト、１４…ケース、
１５…両面粘着カラー、１６…生体、１８…ヘルメット
状電極ホルダー、２０…ダミー生体、２１…筐体、３０
ｎ…第ｎチャンネル補正手段、３１…第１の差動増幅
器、３２…第２の差動増幅器、３３…増幅器、３４…出
力端子、３５…補正回路、３６…比較器、３７…フリッ
プフロップ回路、３８…発振器、３９…カウンタ、４０
…Ｄ／Ａ変換器、４１…トリガ入力端子。10 ... Electrode for bioelectricity detection, 11 ... Electrode part such as silver-silver chloride, 12 ... Lead wire, 13 ... Paste, 14 ... Case,
15 ... Double-sided adhesive color, 16 ... Living body, 18 ... Helmet-shaped electrode holder, 20 ... Dummy living body, 21 ... Housing, 30
n ... Channel correction means, 31 ... First differential amplifier, 32 ... Second differential amplifier, 33 ... Amplifier, 34 ... Output terminal, 35 ... Correction circuit, 36 ... Comparator, 37 ... Flip-flop circuit , 38 ... Oscillator, 39 ... Counter, 40
... D / A converter, 41 ... Trigger input terminal.
Claims (3)
るダミー生体２０と、このダミー生体２０に装着された
対をなす電極１０間の電位差を検出して所定の電圧に補
正する補正手段とを具備してなることを特徴とする生体
電気現象検出装置。1. A dummy living body 20 to which a plurality of bioelectricity detecting electrodes 10 are attached, and a correction means for detecting a potential difference between a pair of electrodes 10 attached to the dummy living body 20 and correcting the potential difference to a predetermined voltage. A bioelectric phenomenon detection device comprising:
た対をなす電極１０間の電位差を検出する第１の差動増
幅器３１と、この第１の差動増幅器３１の出力と補正回
路３５から帰還された出力との電位差を検出する第２の
差動増幅器３２と、順次出力電位を変化せしめて、前記
第１の差動増幅器３１の出力電位と所定の関係値に達し
たとき固定的な電圧を出力する補正回路３５とからなる
請求項１記載の生体電気現象検出装置。2. The correcting means includes a first differential amplifier 31 for detecting a potential difference between a pair of electrodes 10 mounted on a dummy living body 20, an output of the first differential amplifier 31, and a correcting circuit 35. A second differential amplifier 32 for detecting a potential difference from the output fed back from the first differential amplifier 32, and the output potential of the first differential amplifier 31 is changed to a fixed value when a predetermined relation value is reached. The bioelectric phenomenon detection device according to claim 1, further comprising a correction circuit 35 that outputs a different voltage.
ット状電極ホルダー１８に取付けたまま、頭部形状のダ
ミー生体２０に装着するようにした請求項１または２記
載の生体電気現象検出装置。3. The bioelectrical phenomenon detection device according to claim 1, wherein the plurality of bioelectrical detection electrodes 10 are attached to the head-shaped dummy living body 20 while being attached to the helmet-shaped electrode holder 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04108642A JP3103427B2 (en) | 1992-04-01 | 1992-04-01 | Bioelectricity detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04108642A JP3103427B2 (en) | 1992-04-01 | 1992-04-01 | Bioelectricity detector |
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| Publication Number | Publication Date |
|---|---|
| JPH05277080A true JPH05277080A (en) | 1993-10-26 |
| JP3103427B2 JP3103427B2 (en) | 2000-10-30 |
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| JP04108642A Expired - Fee Related JP3103427B2 (en) | 1992-04-01 | 1992-04-01 | Bioelectricity detector |
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