JPS5937466A - Optical measuring device - Google Patents
Optical measuring deviceInfo
- Publication number
- JPS5937466A JPS5937466A JP57149604A JP14960482A JPS5937466A JP S5937466 A JPS5937466 A JP S5937466A JP 57149604 A JP57149604 A JP 57149604A JP 14960482 A JP14960482 A JP 14960482A JP S5937466 A JPS5937466 A JP S5937466A
- Authority
- JP
- Japan
- Prior art keywords
- output
- light source
- light
- photoelectric converter
- measured
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
- G01R15/241—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using electro-optical modulators, e.g. electro-absorption
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は例えば電圧等の被測定量を光学的な変化とし
てとらえ、その変化から被測定量に比例した電気出力を
得るようにした光学的測定装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical measuring device that captures a quantity to be measured, such as voltage, as an optical change, and obtains an electrical output proportional to the quantity to be measured from the change.
ｌｑ ）
従来の光学的測定装置は光学系（光源、光伝送路、光セ
ンサ、光電変換器等）の異常を監視していないため、例
えば光源が劣化して測定装置の出力に異常をきたしても
、異常であることがわからなかった。特にこの測定装置
の出力を常時連続して使う場合は問題であった。lq) Conventional optical measurement devices do not monitor abnormalities in the optical system (light source, optical transmission line, optical sensor, photoelectric converter, etc.), so if the light source deteriorates and causes an abnormality in the output of the measurement device, for example. I didn't know anything was wrong either. This was especially a problem when the output of this measuring device was used continuously all the time.
この発明は上記のような従来のものの欠点を除去するた
めになされたもので、光源と光電変換器の出力とがある
一定の範囲内に入っているか否かを常時監視することに
より、異常の有無を使用者に知らせ、測定装置を正常な
状態で使用させることを目的としたものである。This invention was made to eliminate the drawbacks of the conventional ones as described above, and by constantly monitoring whether the output of the light source and the photoelectric converter are within a certain range, it is possible to detect abnormalities. The purpose of this is to inform the user of the presence or absence of the measurement device and to allow the user to use the measurement device in a normal condition.
以下図に示すこの発明の一実施例について説明する。図
はこの発明に係る光学的測定装置の一実施例を示す構成
図で、図において、（１）は例えばＬｌＣＤである光源
、（２）は光源（１）の駆動電流を検出するための第１
の検出抵抗、（３）は光源（１）の光を伝送するための
第１の光ファイバ、（４）は例えば電界中に設置され被
測定量である電圧に応じて第１の光ファイバ（３）から
の入射光を強度変化させる光センサ、（５）は光センサ
（４）の出射光を伝送するための第２の光ファイバ、（
６）は第２の光ファイバ（５）からの光を電気信号に変
換する例えばフォトダイオードである光電変換器、（７
）は光電変換器（６）の出力を検出する第２の検出抵抗
１（８）は第１の検出抵抗（２）の出力が第１の所定範
囲外になると出力を生じる第１のウィンドコンパレータ
、（９）は第２の検出抵抗（７）の出力の平均値を得る
平均値回路、（１０）は平均値回路（９）の出力が第２
の所定範囲外になると出力を生じる第２のウィンドコン
パレータ、（１１）は第１゜第２のウィンドコンパレー
タ（ｓ）ｔ （１０）ノ少なくとも何れか一方が出力を
生じると付勢されて出力を生じるオア回路、（１２）は
オア回路（１１）の出力によって付勢され装置が異常で
あることを表示する表示器、（１３）は第２の検出抵抗
（′７）の交流成分出力と平均値回路（９）の出力との
比によって例えば電圧である被測定量に比例した出力を
生じる処理回路である。An embodiment of the present invention shown in the drawings will be described below. The figure is a configuration diagram showing an embodiment of the optical measuring device according to the present invention. In the figure, (1) is a light source, for example, an LlCD, and (2) is a light source for detecting the driving current of the light source (1). 1
(3) is a first optical fiber for transmitting the light from the light source (1), (4) is installed in an electric field, and the first optical fiber ((4) is installed in an electric field and is connected to (3) is an optical sensor that changes the intensity of the incident light from the optical sensor (5), a second optical fiber for transmitting the output light from the optical sensor (4), (
6) is a photoelectric converter, for example a photodiode, which converts the light from the second optical fiber (5) into an electrical signal;
) is a first window comparator that produces an output when the output of the first detection resistor (2) is outside the first predetermined range. , (9) is an average value circuit that obtains the average value of the output of the second detection resistor (7), and (10) is an average value circuit that obtains the average value of the output of the second detection resistor (7).
A second window comparator (11) that generates an output when the voltage is outside a predetermined range is energized and outputs when at least one of the first and second window comparators (s) and (10) generates an output. The generated OR circuit, (12) is an indicator energized by the output of the OR circuit (11) to indicate that the device is abnormal, and (13) is the AC component output of the second detection resistor ('7) and the average. This is a processing circuit that generates an output proportional to a measured quantity, such as a voltage, depending on the ratio with the output of the value circuit (9).
次に動作について説明する。光源（１）はその駆動電流
に応じた輝度を発する。このため駆動電流が一定になる
ように設定しておけば、一定の光が第１の光ファイバ（
３）に伝搬し、光センサ（４）に入射する。光センサ（
４）は例えば電界中に設置され、被測定量である電圧に
応じて第１の光ファイバ（３）からの入射光を強度変化
して出射する。Next, the operation will be explained. The light source (1) emits brightness according to its driving current. Therefore, if the drive current is set to be constant, a constant amount of light will be transmitted to the first optical fiber (
3) and enters the optical sensor (4). Optical sensor (
4) is installed, for example, in an electric field, and emits the incident light from the first optical fiber (3) with the intensity changed depending on the voltage as the measured quantity.
光センサ（４）としては、例えば偏光子、光弾性素子、
検光子等で構成される加速度センサで、振動加速度によ
り一定の入射光が輝度変調されて出射されるものが用い
られる。光センサ（４）からの出射光は第２の光ファイ
バ（５）を伝搬して光電変換器（６）に照射され、光電
変換器（６）はその照射された光に応じた電流を第２の
検出抵抗（η１こ流して電圧に変換する。この電圧の平
均値を平均値回路（９）で求める。また１この平均値に
対する第２の検出抵抗（７）に現われる電圧の交流成分
の比は、光センサ（４）における変調度が一定であるた
め、光源（１）の劣化並びに第１．第２の光ファイバ（
３） 、 （５）の伝搬損失の変化等で光量が変化して
も一定となる。従って、処理回路（１３）において第２
の検出抵抗（７）に現われる電圧の交流成分を平均値回
路（９）で求められる平均値で割算することにより、常
に正確な被測定量である電圧を求めることができる〇
次に、光源（１）または光電変換器（６）が断線、ショ
ートした場合、処理回路（１３）の出力が異常な値とな
る。また光源（１）が大きく劣化したり、第１．第２の
光ファイノ、資３） 、 （５）等で伝搬損失が異常に
大きくなった場合、処理回路（１３）では補償しきれず
精度が悪くなる。従って、光源（１）の駆動電流を第１
の検出抵抗（２）で電圧に変換し１この電圧が第１の所
定範囲（補償できる範囲）以外であると、第１のウィン
ドコンパレータ（８）が付勢されて出力を生じ、オアゲ
ー） （１１）を付勢して表示器（１２）に異常を表示
させるようにしている。また光電変換器（６）側におい
ても、平均値回路（９）の出力が第２の所定範囲（補償
できる範囲）以外であると、第２のウィンドコンパレー
タ（８）が付勢されて出力を生じ、オアゲー）（１１）
を付勢して表示器（１２）に異常を表示させる。すなわ
ち第１．第２の検出抵抗（２） 、 （７）に現われる
電圧は、光源（１）、光電変換器（６）が断線すれば零
になるし、ショートすれば異常に高くなる。また光源（
１）が劣化したり１第１、第２の光ファイバ（３） 、
（５）等で伝搬損失が異常に大きくなっても、光電変
換器（６）側の出力は低下する。従って１第１．第２の
ウィンドコンパレータ（８） 、 （１０）において第
１の検出抵抗（２）、平均値回路（９）の出力が第１．
第２の所定範囲外になることを検出して、異常を検出す
ることができる。As the optical sensor (4), for example, a polarizer, a photoelastic element,
An acceleration sensor composed of an analyzer or the like, which outputs a certain amount of incident light after modulating its brightness based on vibration acceleration, is used. The light emitted from the optical sensor (4) propagates through the second optical fiber (5) and is irradiated onto the photoelectric converter (6), which converts the current in accordance with the irradiated light into the second optical fiber. 2 detecting resistor (η1) and converting it into a voltage. The average value of this voltage is determined by the average value circuit (9). Also, the AC component of the voltage appearing at the second detecting resistor (7) with respect to this average value is Since the degree of modulation in the optical sensor (4) is constant, the ratio is determined by the deterioration of the light source (1) and the difference between the first and second optical fibers (
3) It remains constant even if the light amount changes due to changes in propagation loss in (5). Therefore, in the processing circuit (13), the second
By dividing the alternating current component of the voltage appearing at the detection resistor (7) by the average value determined by the average value circuit (9), the voltage, which is the quantity to be measured, can always be determined accurately. Next, the light source (1) or the photoelectric converter (6) is disconnected or short-circuited, the output of the processing circuit (13) becomes an abnormal value. In addition, the light source (1) may be significantly deteriorated, or the light source (1) may be significantly deteriorated. If the propagation loss becomes abnormally large in the second optical fiber, 3), (5), etc., the processing circuit (13) cannot compensate for it and the accuracy deteriorates. Therefore, the driving current of the light source (1) is
If this voltage is outside the first predetermined range (compensable range), the first window comparator (8) is energized and produces an output. 11) to display an abnormality on the display (12). Also, on the photoelectric converter (6) side, if the output of the average value circuit (9) is outside the second predetermined range (compensable range), the second window comparator (8) is energized to reduce the output. arising, or game) (11)
is energized to display an abnormality on the display (12). That is, the first. The voltage appearing across the second detection resistors (2) and (7) will become zero if the light source (1) and photoelectric converter (6) are disconnected, and will become abnormally high if they are short-circuited. Also, the light source (
1) may deteriorate or the first and second optical fibers (3) may deteriorate.
Even if the propagation loss becomes abnormally large due to (5) or the like, the output on the photoelectric converter (6) side will decrease. Therefore, 1st. In the second window comparators (8) and (10), the outputs of the first detection resistor (2) and the average value circuit (9) are connected to the first.
An abnormality can be detected by detecting that it is outside the second predetermined range.
なお、上記実施例では電圧の測定について述べたが、そ
の他湿度等の物理量の測定であってもよい。In the above embodiment, voltage measurement was described, but other physical quantities such as humidity may also be measured.
以上のようにこの発明によれば〜光学系の異常を常時監
視することにより、常に信頼できる正確な被測定量に応
じた出力を得ることができ、異常時には異常を表示する
ことができる効果を有する。As described above, according to the present invention, by constantly monitoring abnormalities in the optical system, it is possible to obtain reliable and accurate output according to the measured quantity at all times, and when an abnormality occurs, it is possible to display the abnormality. have
（７）
図はこの発明に係る光学的測定装置の一実施例を示す構
成図である。
図において、（１）は光源、（２）は第１の検出抵抗、
（３）は第１の光ファイバ１（滲は光センサ−（５）は
第２の光ファイバ、（６）は光電変換器、（′７）は第
２の検出抵抗、（８）は第１のウィンドコンパレータ１
（９）は平均値回路、（１０）は第２のウィンドコンパ
レーター、（１１）はオア回路、（１２）は表示器、（
１３）は処理回路である。
代理人 弁理士 葛 野 信 −（８）
手続補正書（自発）
特許庁長官殿
１、事件の表示 特願昭５７−１４９６０４号２
、発明の名称
光学的測定装置
３、補正をする者
（１）
５、補正の対象
明細書の発明の詳細な説明の欄
６、補正の自答
（１）明細書中箱２頁第１７行に「電圧等」とあるのを
「加速度等」と訂正する。
（２）同第３頁第１９行に「電界中に」とあるのを「被
測定物に」と訂正する。
（３）同第３頁第１９行に「電圧」とあるのを「加速度
」と訂正する。
（４）同第４頁第１８行に「電圧」とあるのを「加速度
」と訂正する。
（５）同第５頁第４行に「電界中に」とあるのを「被測
定物に」と訂正する。
（６）同第５頁第５行に「電圧」とあるのを「加速度」
と訂正する。
（７）同第６頁第３行〜第４行に「電圧」とあるのを゛
「加速度」と訂正する。
（８）同９４７頁第１２行に「電圧」とあるのを「加速
度」と訂正する。
（９）同第７亘第１３行に「温度等」とあるのを「温度
、電圧等」と訂正する。
以上(7) The figure is a configuration diagram showing an embodiment of the optical measuring device according to the present invention. In the figure, (1) is a light source, (2) is a first detection resistor,
(3) is the first optical fiber 1 (the light sensor is the optical sensor, (5) is the second optical fiber, (6) is the photoelectric converter, ('7) is the second detection resistor, and (8) is the second optical fiber. 1 window comparator 1
(9) is the average value circuit, (10) is the second window comparator, (11) is the OR circuit, (12) is the display, (
13) is a processing circuit. Agent Patent Attorney Shin Kuzuno - (8) Procedural Amendment (Voluntary) Commissioner of the Japan Patent Office 1, Indication of Case Patent Application No. 149604/1982 2
, Title of the invention Optical measuring device 3, Person making the amendment (1) 5. Column 6 for detailed explanation of the invention in the specification to be amended, Self-answer for the amendment (1) Box 2, line 17 of the specification Correct "voltage, etc." to "acceleration, etc." (2) On page 3, line 19, the phrase "in the electric field" is corrected to "in the object to be measured." (3) On page 3, line 19, the word "voltage" is corrected to "acceleration." (4) On page 4, line 18, "voltage" is corrected to "acceleration." (5) In the fourth line of page 5, the phrase "in an electric field" is corrected to "in the object to be measured." (6) In the 5th line of page 5, replace ``voltage'' with ``acceleration.''
I am corrected. (7) On page 6, lines 3 and 4, the word ``voltage'' is corrected to ``acceleration.'' (8) On page 947, line 12, the word "voltage" is corrected to "acceleration." (9) In the 7th line, line 13, "temperature, etc." is corrected to "temperature, voltage, etc."that's all
Claims (1)
記光センサに光を供給する光源、前記光センサからの出
射光を受は前記出射光を電気信号に変換する光電変換器
、前記光電変換器の出力から前記被測定量に対応した電
気出力を取出す処理回路を備え、前記光源の駆動電流値
および前記光電変換器の電気出力の前記被測定量の変化
番こ対する平均値を監視することにより、光学系の異常
を検出するようにしたことを特徴とする光学的測定装置
。 ２、光源は、第１の検出抵抗に直列接続され、前記第１
の検出抵抗の電圧降下が第１のウィンドコンパレータに
おいて第１の所定範囲内にあるか否かを判別するように
した特許請求の範囲第１項記載の光学的測定装置。 ３、 光電変換器は、第２の検出抵抗に直列接続（１） され、前記第２の検出抵抗の電圧降下は平均値回路で平
均値が求められた後、前記平均値が第２のウィンドコン
パレータにおいて第２の所定範囲内にあるか否かを判別
するようにした特許請求の範囲第１項または第２項記載
の光学的測定装置。 ４、処理回路は、第２の検出抵抗の電圧降下の交流成分
を平均値回路の平均値で割って被測定量に応じた出力を
得るようにした特許請求の範囲第１項ないし第３項の何
れか−に記載の光学的測定装置。 ５、 第１．第２のウィンドコンパレータの出力載の光
学的測定装置。[Scope of Claims] 1. An optical sensor that modulates the intensity of light according to the amount to be measured, a light source that supplies light to the optical sensor, a receiver that receives light emitted from the optical sensor, and converts the emitted light into an electrical signal. a photoelectric converter, comprising a processing circuit that extracts an electrical output corresponding to the measured quantity from the output of the photoelectric converter, and a processing circuit that extracts an electrical output corresponding to the measured quantity from the output of the photoelectric converter, and a change number of the driven current value of the light source and the electrical output of the photoelectric converter in the measured quantity. An optical measuring device characterized in that an abnormality in an optical system is detected by monitoring the average value of the measured values. 2. The light source is connected in series to the first detection resistor, and the light source is connected in series to the first detection resistor.
2. The optical measuring device according to claim 1, wherein the first window comparator determines whether or not the voltage drop across the detection resistor is within a first predetermined range. 3. The photoelectric converter is connected in series to a second detection resistor (1), and the voltage drop across the second detection resistor is averaged by an average value circuit, and then the average value is determined by a second window. 3. The optical measuring device according to claim 1, wherein the comparator determines whether or not the second predetermined range is within the second predetermined range. 4. The processing circuit divides the alternating current component of the voltage drop of the second detection resistor by the average value of the average value circuit to obtain an output according to the measured quantity. The optical measurement device according to any one of -. 5. 1st. Optical measuring device on the output of the second window comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57149604A JPS5937466A (en) | 1982-08-26 | 1982-08-26 | Optical measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57149604A JPS5937466A (en) | 1982-08-26 | 1982-08-26 | Optical measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5937466A true JPS5937466A (en) | 1984-02-29 |
| JPH0472181B2 JPH0472181B2 (en) | 1992-11-17 |
Family
ID=15478832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57149604A Granted JPS5937466A (en) | 1982-08-26 | 1982-08-26 | Optical measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5937466A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5434624U (en) * | 1977-08-12 | 1979-03-07 | ||
| JPS557604A (en) * | 1978-06-20 | 1980-01-19 | Komatsu Ltd | Detector for displacement |
| JPS5781776A (en) * | 1980-11-10 | 1982-05-21 | Mitsubishi Electric Corp | Facsimile equipment |
| JPS5781766A (en) * | 1980-11-11 | 1982-05-21 | Ricoh Co Ltd | Storage system of picture information |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5177279A (en) * | 1974-12-27 | 1976-07-05 | Fujitsu Ltd | PIIKUTENKENSHUTSUKAIRO |
-
1982
- 1982-08-26 JP JP57149604A patent/JPS5937466A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5434624U (en) * | 1977-08-12 | 1979-03-07 | ||
| JPS557604A (en) * | 1978-06-20 | 1980-01-19 | Komatsu Ltd | Detector for displacement |
| JPS5781776A (en) * | 1980-11-10 | 1982-05-21 | Mitsubishi Electric Corp | Facsimile equipment |
| JPS5781766A (en) * | 1980-11-11 | 1982-05-21 | Ricoh Co Ltd | Storage system of picture information |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0472181B2 (en) | 1992-11-17 |
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