JPH0552455B2 - - Google Patents
Info
- Publication number
- JPH0552455B2 JPH0552455B2 JP59217668A JP21766884A JPH0552455B2 JP H0552455 B2 JPH0552455 B2 JP H0552455B2 JP 59217668 A JP59217668 A JP 59217668A JP 21766884 A JP21766884 A JP 21766884A JP H0552455 B2 JPH0552455 B2 JP H0552455B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- section
- optical fiber
- fiber cable
- signal processing
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
- G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、道路トンネル内の煙霧透過率を測定
する光フアイバー応用の校正機能をもつた煙霧透
過率測定装置（以下VI計という）に関するもの
である。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a smoke transmittance measuring device (hereinafter referred to as VI meter) having a calibration function that uses optical fiber to measure the smoke transmittance in a road tunnel. .
従来例の構成とその問題点
従来のVI計では、トンネル内の煙霧透過率値
（以下VI値という）は少くとも１週間に一度位は
97％以上になることをもとにある一定期間、97％
未満を継続した場合に、約３％のVI値を上昇さ
せる校正方法であつた。しかし、長大トンネルで
は、97％以上にほとんどなることがなく、上記理
論が該当しない。したがつて従来の校正方法を有
したVI計では長大トンネルに適応できない。Configuration of the conventional example and its problems With the conventional VI meter, the smoke transmittance value (hereinafter referred to as VI value) inside the tunnel is calculated at least once a week.
97% for a certain period of time based on 97% or higher
This is a calibration method that increases the VI value by about 3% if the value continues to be less than 3%. However, in long tunnels, it rarely exceeds 97%, so the above theory does not apply. Therefore, VI meters with conventional calibration methods cannot be applied to long tunnels.
発明の目的
本発明は、長大トンネルにおいても適応できる
校正機能をもつたVI計を提供することを目的と
するものである。OBJECT OF THE INVENTION The object of the present invention is to provide a VI meter with a calibration function that can be applied even in long tunnels.
発明の構成
そのための構成として本発明の光フアイバー応
用の校正機能をもつた煙霧透過率測定装置は、少
なくとも投光部と、遮蔽板を具備する導光部と、
光電管を具備する受光部と、信号処理部と、光ス
イツチを具備し、上記導光部と並列に配設された
光フアイバーケーブルとからなり、通常測定時は
導光部の遮蔽板を開とするとともに光フアイバー
ケーブルの光スイツチをオフとし、一定周期毎に
行う較正時は導光部の遮蔽板を閉とするとともに
光フアイバーケーブルの光スイツチをオンとし、
投光部からの投射光を光フアイバーケーブルを通
して受光部へ伝送して光電管にて電気信号に変換
し信号処理部へ出力し、その信号処理部では受信
した信号をVI値に変換し、そのVI値がある設定
値以下になつた時に前記VI値を上昇させるよう
にして光フアイバー応用の校正機能をもつたVI
計を構成したものである。Structure of the Invention To achieve this, the smoke transmittance measuring device having a calibration function using optical fiber according to the present invention includes at least a light projecting section, a light guide section including a shielding plate,
It consists of a light receiving section equipped with a phototube, a signal processing section, and an optical fiber cable equipped with an optical switch and arranged in parallel with the light guide section. During normal measurement, the shielding plate of the light guide section is opened. At the same time, the optical switch of the optical fiber cable is turned off, and when calibration is performed at regular intervals, the shielding plate of the light guide section is closed and the optical switch of the optical fiber cable is turned on.
The projected light from the light emitter is transmitted to the light receiver through an optical fiber cable, converted into an electrical signal by a phototube, and output to the signal processing section.The signal processing section converts the received signal into a VI value, and converts the received signal into a VI value. A VI that has a calibration function for optical fiber application by increasing the VI value when the value falls below a certain set value.
It consists of a meter.
実施例の説明
以下本発明の一実施例について図面とともに説
明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
図において、Ａは投光部、Ｂは受光部、Ｃは信
号処理部、Ｄは導光部、１はランプ、２はレン
ズ、３は遮蔽板、４はマイクロレンズ、５は光電
管、６は増幅回路、７は光スイツチ、８は校正回
路、９は光フアイバーケーブルである。 In the figure, A is a light projector, B is a light receiver, C is a signal processing unit, D is a light guide, 1 is a lamp, 2 is a lens, 3 is a shielding plate, 4 is a microlens, 5 is a phototube, and 6 is a phototube. 7 is an optical switch, 8 is a calibration circuit, and 9 is an optical fiber cable.
そしてその動作は、信号処理部Ｃにて一定周期
毎に校正機能を動作させる。通常測定時は、遮蔽
板３を開いて投光部Ａからの投射光は受光部Ｂに
て、電気信号に変換させ、信号処理部Ｃにてトン
ネル内のVI値に変換し測定する。この間、光ス
イツチ７をオフにし光フアイバーケーブル９によ
る光は受光部Ｂへは投射されない。 The operation is performed by operating the calibration function in the signal processing section C at regular intervals. During normal measurement, the shielding plate 3 is opened and the projected light from the light projecting section A is converted into an electrical signal at the light receiving section B, and then converted into a VI value in the tunnel at the signal processing section C for measurement. During this time, the optical switch 7 is turned off and the light from the optical fiber cable 9 is not projected onto the light receiving section B.
校正時は、遮蔽板３を閉じ、光スイツチ７をオ
ンにしてマイクロレンズ４を受光した投光部Ａの
投射光を光スイツチ７を通して受光部Ｂへ伝送
し、受光部Ｂにて電気信号に変換させる。信号処
理部Ｃでは校正時、このVI値がある設定値未満
ならば、校正回路８の増幅度をVI値が設定値以
上になるまで上昇させ、設定値以上になれば校正
回路８の校正を終了する。これによりランプ１の
劣化、レンズ２面の汚れ、および光電管５の劣化
によるVI値の低下分を、信号処理部Ｃの校正回
路８の増幅により補正することができる。 During calibration, the shielding plate 3 is closed, the optical switch 7 is turned on, and the projected light from the light projecting section A that has been received by the microlens 4 is transmitted to the light receiving section B through the optical switch 7, and the light receiving section B converts it into an electrical signal. Convert. At the time of calibration, in the signal processing section C, if this VI value is less than a certain set value, the amplification degree of the calibration circuit 8 is increased until the VI value exceeds the set value, and when the VI value exceeds the set value, the calibration of the calibration circuit 8 is performed. finish. Thereby, the decrease in the VI value due to deterioration of the lamp 1, dirt on the surface of the lens 2, and deterioration of the phototube 5 can be corrected by the amplification of the calibration circuit 8 of the signal processing section C.
発明の効果
以上のような構成により本発明は、ほとんど
VI値が100％付近に上昇することのない長大トン
ネルにおいても適応できる校正機能であり、従来
以上に正確なVI値が測定できるものである。Effects of the Invention With the above configuration, the present invention can achieve almost all
This is a calibration function that can be applied even in long tunnels where the VI value does not rise to around 100%, making it possible to measure VI values more accurately than before.
図は本発明による煙霧透過率測定装置の一実施
例のブロツク図である。
Ａ……投光部、Ｂ……受光部、Ｃ……信号処理
部、Ｄ……導光部、１……ランプ、２……レン
ズ、３……遮蔽板、４……マイクロレンズ、５…
…光電管、６……増幅回路、７……光スイツチ、
８……校正回路、９……光フアイバーケーブル。
The figure is a block diagram of an embodiment of a smoke transmittance measuring device according to the present invention. A... Light projecting section, B... Light receiving section, C... Signal processing section, D... Light guiding section, 1... Lamp, 2... Lens, 3... Shielding plate, 4... Micro lens, 5 …
...Phototube, 6...Amplification circuit, 7...Optical switch,
8...Calibration circuit, 9...Optical fiber cable.
Claims (1)
部と、光電管を具備する受光部と、信号処理部
と、光スイツチを具備し、前記導光部と並列に配
設された光フアイバーケーブルとからなる煙霧透
過率測定装置であつて、通常測定時は前記導光部
の遮蔽板を開とするとともに前記光フアイバーケ
ーブルの光スイツチをオフとし、一定周期毎に行
う較正時は前記導光部の遮蔽板を閉とするととも
に前記光フアイバーケーブルの光スイツチをオン
とし、前記投光部からの投射光を前記光フアイバ
ーケーブルを通して前記受光部へ伝送して光電管
にて電気信号に変換し、前記信号処理部へ出力
し、その信号処理部では受信した信号を煙霧透過
率値に変換し、その煙霧透過率値がある設定値未
満になつた時に前記煙霧透過率値を上昇させる光
フアイバー応用の校正機能をもつた煙霧透過率測
定装置。1. An optical fiber cable that includes at least a light projecting section, a light guiding section including a shielding plate, a light receiving section including a phototube, a signal processing section, and an optical switch, and is arranged in parallel with the light guiding section. A smoke transmittance measuring device comprising: during normal measurement, the shielding plate of the light guide section is opened and the optical switch of the optical fiber cable is turned off, and when calibration is performed at regular intervals, the light guide section is opened. closing the shielding plate of the part and turning on the optical switch of the optical fiber cable, transmitting the projected light from the light projecting part to the light receiving part through the optical fiber cable and converting it into an electrical signal by a phototube, Optical fiber application that outputs the signal to the signal processing section, the signal processing section converts the received signal into a smoke transmittance value, and increases the fog transmittance value when the smoke transmittance value becomes less than a certain set value. A smoke transmittance measurement device with a calibration function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59217668A JPS6196442A (en) | 1984-10-17 | 1984-10-17 | Fog transmittance measurement device with optical fiber calibration function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59217668A JPS6196442A (en) | 1984-10-17 | 1984-10-17 | Fog transmittance measurement device with optical fiber calibration function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6196442A JPS6196442A (en) | 1986-05-15 |
| JPH0552455B2 true JPH0552455B2 (en) | 1993-08-05 |
Family
ID=16707845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59217668A Granted JPS6196442A (en) | 1984-10-17 | 1984-10-17 | Fog transmittance measurement device with optical fiber calibration function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6196442A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6948523B2 (en) * | 2017-11-30 | 2021-10-13 | パナソニックＩｐマネジメント株式会社 | Haze transmittance measuring device and smoke transmittance measuring method using it |
-
1984
- 1984-10-17 JP JP59217668A patent/JPS6196442A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6196442A (en) | 1986-05-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |