JPS623642A - Particle counter - Google Patents

Particle counter

Info

Publication number
JPS623642A
JPS623642A JP60143641A JP14364185A JPS623642A JP S623642 A JPS623642 A JP S623642A JP 60143641 A JP60143641 A JP 60143641A JP 14364185 A JP14364185 A JP 14364185A JP S623642 A JPS623642 A JP S623642A
Authority
JP
Japan
Prior art keywords
light source
light
signal
sent
noise
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
Application number
JP60143641A
Other languages
Japanese (ja)
Inventor
Shigehide Kuhara
重英 久原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP60143641A priority Critical patent/JPS623642A/en
Publication of JPS623642A publication Critical patent/JPS623642A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent erroneous measurement by comparing a desired signal obtained by receiving a part of the light from a light source with a prescribed signal. CONSTITUTION:The light from a laser light source 1 is distributed in two directions by a beam splitter 2 and is sent to a particle detecting part 3 and a photodetector 4 of a light source noise monitor. The incident light of the detecting part 3 is scanned optically on a sample plate, and the scattered light from a sample is converted electrically and passes a particle counting and classifying circuit 5 and is displayed on a display device 6. The incident light of the photodetector 4 is converted to an electric signal and is sent to a noise component extracting circuit 7, and a desired noise component signal is detected as the electric signal. This signal is sent to a comparator 8 and is compared with a reference signal which is sent from a prescribed value generating circuit 9 and has a preliminarily determined prescribed magnitude. The noise level of the light source 1 is displayed on a display device 10 if it exceeds a reference value, thus preventing erroneous measurement due to noise.

Description

【発明の詳細な説明】 〔発明の技術分野〕 この発明は光学的手段を用いて粒子の数および大きさを
計測する粒子針鼠装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a particle needle device that measures the number and size of particles using optical means.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

光学的に粒子を計数、分類する装置において、光源の強
度および安定性が計測の精度(こ重要な影響を及ぼすこ
とが知られている。例えば電球等の光源は寿命末期時あ
るいは点灯初期時に光源強度がある規定値より低下する
ために、粒子の数および大きさを正確に計測することが
できなくなり。
In devices that optically count and classify particles, it is known that the intensity and stability of the light source have an important effect on the measurement accuracy. Since the intensity drops below a certain specified value, it becomes impossible to accurately measure the number and size of particles.

信頼性に欠ける面があった。また、レーザ光源は寿命末
期時にプラズマ放電によるノイズが発生するとともに、
出力値が規定値に達するまでの点灯初期時にプラズマ放
電によるノイズが発生することが知られている。このノ
イズは特に微小な粒子を計測するうえで障害となり、誤
計測を招く恐れがあった。
There was a lack of reliability. In addition, laser light sources generate noise due to plasma discharge at the end of their life, and
It is known that noise is generated due to plasma discharge at the initial stage of lighting until the output value reaches a specified value. This noise becomes an obstacle when measuring particularly small particles, and may lead to erroneous measurements.

〔発明の目的〕[Purpose of the invention]

この発明は上記の問題点を解決するためになされたもの
で、光源の強度ならびにノイズを監視して常に良好な光
を供給して誤計測を未然に防止することができる粒子計
数装置を提供することを目的とする。
This invention was made to solve the above problems, and provides a particle counting device that can monitor the intensity and noise of a light source to always supply good light and prevent erroneous measurements. The purpose is to

〔発明の概要〕[Summary of the invention]

この発明は光学的手段を用いて粒子の数および大きさを
計測する粒子計数装置において、光源からの光の少なく
とも一部を受光して得られた所望の信号をある規定の大
きさの信号と比較させて、その判定結果にもとづいて光
源の状態を監視できるようζこしたものである。
This invention relates to a particle counting device that measures the number and size of particles using optical means, in which a desired signal obtained by receiving at least a portion of light from a light source is converted into a signal of a certain prescribed size. This is done so that the state of the light source can be monitored based on the comparison result.

〔発明の効果〕〔Effect of the invention〕

この発明によれば光源の状態を監視して光源の経年変化
もしくは何らかの原因により生ずる出力低下やノイズ発
生を速やかに察知して誤計測を未然に防止することがで
きるため、計測精度を著しく向上させることができると
ともに信頼性を高めることができる。
According to this invention, it is possible to monitor the state of the light source and promptly detect a decrease in output or noise caused by aging of the light source or any other cause, thereby preventing erroneous measurements, thereby significantly improving measurement accuracy. It is possible to improve reliability.

〔発明の実施例〕 以下、図面を参照してこの発明の一実施例を説明する。[Embodiments of the invention] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

第1図はこの発明をレーザ光方式粒子計数装置に適用し
た例を示している。図において、1はコヒーレントな光
を発生するレーザ光源で、この光源1からのレーザ光は
ビームスプリッタ2により2方向に分配されて粒子検出
部3と光源ノイズモニタの受光器4に送られる。粒子検
出部3に入射した光は例えば血液等をのせた試料板上を
光学的に走査する。粒子検出部3では血球からの散乱光
を電気信号に変換し、その出力は従来装置と同様にして
粒子計数分類回路5を経て表示装置6に表示される。
FIG. 1 shows an example in which the present invention is applied to a laser beam type particle counting device. In the figure, reference numeral 1 denotes a laser light source that generates coherent light, and the laser light from this light source 1 is split into two directions by a beam splitter 2 and sent to a particle detector 3 and a light receiver 4 of a light source noise monitor. The light incident on the particle detection unit 3 optically scans a sample plate on which, for example, blood or the like is placed. The particle detection section 3 converts the scattered light from the blood cells into an electrical signal, and the output thereof is displayed on the display device 6 via the particle counting and classification circuit 5 in the same manner as in the conventional device.

一方、光源ノイズモニタの受光器4(こ入射した光は電
気信号に変換されたのち、ノイズ成分抽出回路7に送ら
れて所望するノイズ成分信号だけがレベルに応じた電気
信号として検出される。この信号は比較器8に送られ、
ここで規定値発生回路9かl″)送られてくる予め定め
られた規定の大きさの基準値信号と比較され、光源1の
ノ・イズレベルが基準値を超えたときに表示器10にそ
の結果が表示される。この表示器10は、例えばノイズ
レベルが基準値より低い正常状態時に緑色のランプを点
灯させ、ノイズレベルが基準値を超える異常状態時に赤
色ランプを点滅させて警報を発するようにすることがで
きる。
On the other hand, the light incident on the light receiver 4 of the light source noise monitor is converted into an electrical signal and then sent to the noise component extraction circuit 7, where only the desired noise component signal is detected as an electrical signal according to its level. This signal is sent to comparator 8,
Here, it is compared with a reference value signal of a predetermined size sent to the reference value generation circuit 9 or l''), and when the noise level of the light source 1 exceeds the reference value, the display 10 shows the signal. The result is displayed.The display 10 is configured to, for example, turn on a green lamp in a normal state where the noise level is lower than a reference value, and flash a red lamp to issue an alarm in an abnormal state where the noise level exceeds a reference value. It can be done.

したがって、このような構成によれば、経年変化または
始動時に発生するプラズマ放電に起因するノイズが基準
値を超えた異常状態になった場合に使用者に警告を促す
ことができるので、ノイズに起因する誤計測を未然に防
止することができもまた。使用中に警報が発せられると
、レーザ光源1の経年変化によるノイズが発生している
ことを知ることができ、レーザ光源の交換を適確に把揖
することができる。さらに、電源投入後、光源1の出力
が安定するまでの期間中使用者に警告を促すことができ
るので、これを持切状態を表示するウェイト信号として
利用することができる。
Therefore, according to such a configuration, it is possible to prompt a warning to the user when an abnormal state occurs in which noise caused by secular change or plasma discharge generated at startup exceeds the standard value, so that the user can be warned. It is also possible to prevent erroneous measurements. If an alarm is issued during use, it can be known that noise is occurring due to aging of the laser light source 1, and it is possible to accurately determine whether to replace the laser light source. Further, since a warning can be given to the user during the period after the power is turned on until the output of the light source 1 becomes stable, this can be used as a wait signal to indicate the out-of-service state.

次に、この発明の他実施例を第2図を用いて説明する。Next, another embodiment of the invention will be described with reference to FIG.

光源11からの光はビームスプリッタ12により2方向
に分配され粒子検出部13と光源強度モニタの受光器1
4に送られる。粒子検出部13からの出力は従来装置と
同様−こして粒子計数分類回路15を経て表示装置16
(こ表示される。
Light from a light source 11 is split into two directions by a beam splitter 12 and sent to a particle detector 13 and a light receiver 1 of a light source intensity monitor.
Sent to 4. The output from the particle detection section 13 is the same as in the conventional device - through the particle counting and classification circuit 15 and then sent to the display device 16.
(This is displayed.

一方、光源強度モニタの受光器16に入射した光は強度
に応じた電気信号として検出される。この信号は比較器
17に送られ、ここで規定値発生回路18から送られて
くる予め定められた規定の大きさの基準値信号と比較さ
れ、光源11の強度が基準値より低下したとき表示器1
9にその結果が表示される。この表示器工9は、例えば
光源強度が基準値を超える正常状態時に緑色ランプを点
灯させ、光源強度が基準値より低下した異常状態時に赤
ランプを点滅させて警報を発するようにすることができ
る。
On the other hand, the light incident on the light receiver 16 of the light source intensity monitor is detected as an electrical signal according to the intensity. This signal is sent to the comparator 17, where it is compared with a reference value signal of a predetermined size sent from the reference value generation circuit 18, and an indication is displayed when the intensity of the light source 11 has decreased below the reference value. Vessel 1
The results are displayed in 9. The display device 9 can, for example, turn on a green lamp in a normal state in which the light source intensity exceeds a reference value, and flash a red lamp to issue an alarm in an abnormal state in which the light source intensity falls below a reference value. .

したがって、このような構成lこよれば、経年変化また
は始動時に光源強度が基準値より低下し異常状態lこな
った場合lこ使用者に警告を促すことができるので、出
力低下1こ起因する誤計測を未然に防止することができ
る。また、警報により光源11の出力低下を知ることが
できるため、光源の交換を適確に把握することができる
。さらに上記実施例と同様に警報をウェイト信号として
利用することができる。
Therefore, according to such a configuration, if the light source intensity decreases from the reference value due to aging or startup, and an abnormal condition occurs, a warning can be prompted to the user, so that the output decreases due to the decrease in output. Erroneous measurements can be prevented. Furthermore, since the alarm can notify the user of a decrease in the output of the light source 11, it is possible to accurately determine whether to replace the light source. Furthermore, similar to the above embodiment, an alarm can be used as a wait signal.

なお、この発明は上記実施例に限定されるものではなく
、要旨を変更しない範囲において種々変形して実施する
ことができる。
Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without changing the gist.

例えば、上記実施例では光源からの光をビームスプIJ
 ツタで分配し一部を光源モニタ用受光器を介してモニ
タするようにしたが、光源からの光を全て検出部で受光
し、検出部の内部受光器を介してモニタすることもでき
る。この場合、粒子計測時以外の空いた時間に検出部の
内部受光器をモニタ側回路系に切換え接続することで容
易に実現することができる。
For example, in the above embodiment, the light from the light source is
Although the light is distributed by the ivy and a part of the light is monitored through the light receiver for monitoring the light source, it is also possible to receive all the light from the light source by the detection section and monitor it through the internal light receiver of the detection section. In this case, this can be easily realized by switching and connecting the internal light receiver of the detection section to the monitor side circuit system during free time other than during particle measurement.

また、上記実施例では、光源からの光をビームスプリッ
タで分配させたが、このビームスプリッタを用いずに検
出部内の光学系のレンス表面による反射光やもれ光を光
源モニタ用受光器を介してモニタすることもできる。
In addition, in the above embodiment, the light from the light source is distributed by the beam splitter, but instead of using this beam splitter, the reflected light and leakage light from the lens surface of the optical system in the detection section are transmitted through the light source monitor light receiver. It can also be monitored.

また、上記実施例では比較器の出力に基づいて判定結果
をランプの点滅により報知するようにしたが、ブザーや
計数分類結果を表示する表示装置を用いて報知せしめる
こともできる。
Further, in the above embodiment, the judgment result is notified based on the output of the comparator by flashing a lamp, but the notification can also be made by using a buzzer or a display device that displays the counting and classification results.

さらに、シシテム全体をコントロールするコントローラ
と組み合わせて、警報を発している時期状態時には計測
ができないように測定回路系をオフ制御させることもで
きる。
Furthermore, in combination with a controller that controls the entire system, it is also possible to turn off the measurement circuit system so that measurements cannot be made when an alarm is being issued.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例を示すブロック図、第2図
はこの発明の他実施例を示すブロック図である。
FIG. 1 is a block diagram showing one embodiment of the invention, and FIG. 2 is a block diagram showing another embodiment of the invention.

Claims (3)

【特許請求の範囲】[Claims] (1)光学的手段を用いて粒子の数および大きさを計測
する粒子計数装置において、光源からの光の少なくとも
一部を受光して所望する信号を検出する手段と、上記光
源に対応させて規定の大きさの基準信号を発する規定値
発生回路と、この規定値発生回路の出力と上記手段によ
り検出された出力を比較する比較器と、この比較器の出
力に基づいて判定結果を報知せしめる手段とを具備した
ことを特徴とする粒子計数装置。
(1) In a particle counting device that measures the number and size of particles using optical means, a means for detecting a desired signal by receiving at least a portion of light from a light source, and a means corresponding to the light source. A specified value generation circuit that emits a reference signal of a specified magnitude, a comparator that compares the output of this specified value generation circuit with the output detected by the above means, and a determination result based on the output of this comparator. A particle counting device characterized by comprising: means.
(2)所望する信号を検出する手段は光源からの光に含
まれているノイズ成分を検出することを特徴とする特許
請求の範囲第1項記載の粒子計数装置。
(2) The particle counting device according to claim 1, wherein the means for detecting the desired signal detects a noise component contained in the light from the light source.
(3)所望する信号を検出する手段は光源からの光の強
度を検出することを特徴とする特許請求の範囲第1項記
載の粒子計数装置。
(3) The particle counting device according to claim 1, wherein the means for detecting the desired signal detects the intensity of light from a light source.
JP60143641A 1985-06-29 1985-06-29 Particle counter Pending JPS623642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60143641A JPS623642A (en) 1985-06-29 1985-06-29 Particle counter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60143641A JPS623642A (en) 1985-06-29 1985-06-29 Particle counter

Publications (1)

Publication Number Publication Date
JPS623642A true JPS623642A (en) 1987-01-09

Family

ID=15343499

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60143641A Pending JPS623642A (en) 1985-06-29 1985-06-29 Particle counter

Country Status (1)

Country Link
JP (1) JPS623642A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015012004A1 (en) * 2013-07-23 2015-01-29 ソニー株式会社 Particle analysis device and particle analysis method
JP2018513971A (en) * 2015-04-02 2018-05-31 パーティクル・メージャーリング・システムズ・インコーポレーテッド Laser noise detection and mitigation in particle counters

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015012004A1 (en) * 2013-07-23 2015-01-29 ソニー株式会社 Particle analysis device and particle analysis method
JPWO2015012004A1 (en) * 2013-07-23 2017-03-02 ソニー株式会社 Particle analyzer and particle analysis method
US10031063B2 (en) 2013-07-23 2018-07-24 Sony Corporation Particle analysis apparatus and method for optically detecting particles
JP2018513971A (en) * 2015-04-02 2018-05-31 パーティクル・メージャーリング・システムズ・インコーポレーテッド Laser noise detection and mitigation in particle counters

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