JPS6050403A - Distance sensor - Google Patents
Distance sensorInfo
- Publication number
- JPS6050403A JPS6050403A JP15966183A JP15966183A JPS6050403A JP S6050403 A JPS6050403 A JP S6050403A JP 15966183 A JP15966183 A JP 15966183A JP 15966183 A JP15966183 A JP 15966183A JP S6050403 A JPS6050403 A JP S6050403A
- Authority
- JP
- Japan
- Prior art keywords
- light
- signals
- light beams
- optical fibers
- received
- 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
Links
- 239000013307 optical fiber Substances 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Optical Distance (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
この発明は光ファイバーの限定された投光角・受光角を
利用して、ファイバ一端面から対象面迄の距離を測定す
る距離センサに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a distance sensor that measures the distance from one end face of an optical fiber to a target surface by utilizing the limited light emission angle and light reception angle of an optical fiber.
本技術分野における概存の装置としては米国のＭＴＩ社
の「フォトニックセンサ−」がある。この装置の構成・
原理を第１図に示す。An example of an existing device in this technical field is the "Photonic Sensor" manufactured by MTI of the United States. Configuration of this device
The principle is shown in Figure 1.
この内容を簡単に説明すると次の通りである。A brief explanation of this content is as follows.
光ファイバーによって光伝送される一対の隣接した投光
、受光のエレメント（イ）、（ロ）は、その光学繊維の
開口により定まった投光角ならびに受光角をもち、測定
対象面に対し、それぞれ等価の円錐状の拡がりをもって
いる。全測定物面を一対のエレメント （イ）、（ロ）
から次第に離してい（と投光エレメントの光の円錐形（
ハ）が拡大され、より広い表面が照明されるため、その
反射光の影響を及ぼず隣接した受光エレメントの円錐領
域（反射有効面）（ニ）を増大し、その決果、距離に比
例した光量を得距離信号を？１ているものである。A pair of adjacent light emitting and light receiving elements (a) and (b) transmitted by an optical fiber have a light emitting angle and a light receiving angle determined by the aperture of the optical fiber, and are equivalent to each other with respect to the surface to be measured. It has a conical expansion. A pair of elements (a) and (b) cover the entire measuring object surface.
(and the cone of light of the illuminating element)
C) is enlarged and a wider surface is illuminated, so the conical area (reflective effective surface) of the adjacent light-receiving element (d) is increased without being affected by the reflected light, and as a result, the area is proportional to the distance. Obtain light intensity and distance signal? 1.
しかしながら従来のこの装置では、投光・受光を各１組
の光ファイバーで行なっており、対象面の反射率変動に
対応できない。However, in this conventional device, light is emitted and light is received by a pair of optical fibers, and it is not possible to cope with changes in the reflectance of the target surface.
本発明は上記の欠点に対して、発明されたもので、複数
組の投光用ファイバーによる対象面からの反坩虎天受光
用ファイバーを通して受光し各投光用ファイバーに対応
した受光量を分離し、それらの比を取ることにより対象
面の反射率変動や光ファイバーの屈曲や劣化による透過
率変動をキャンセルする事ができ、また距離が大きくな
る事による反射光量の減衰もキャンセルする事ができる
距離センサを提供せんとする。The present invention was invented in order to solve the above-mentioned drawbacks.The present invention receives light from the target surface through multiple sets of light-emitting fibers through the receiving fibers, and separates the amount of received light corresponding to each light-emitting fiber. However, by taking the ratio of these, it is possible to cancel reflectance fluctuations of the target surface and transmittance fluctuations due to bending and deterioration of the optical fiber, and it is also possible to cancel the attenuation of the amount of reflected light due to increasing distance. We are trying to provide a sensor.
本発明の要旨とするところは、複数組の投光用ファイバ
ーと各投光用乙アイバーに対応した光源と投光された光
の対象面からの反射光を受光する受光用ファイバーと受
光用ファイバーで受光された各投光用ファイバーによる
対象面からの反射光景を各々別個の電気信号に変換する
光電変換手段と各々の電気信号の比から対象面迄の距離
を計算する処理回路から構成舎れることを特徴とする光
さ
学式距離センサである。The gist of the present invention is to provide a plurality of sets of light emitting fibers, a light source corresponding to each light emitting eye bar, a light receiving fiber that receives the reflected light from the target surface of the emitted light, and a light receiving fiber. It consists of photoelectric conversion means that converts the reflected scenes from the target surface by each light projection fiber into separate electrical signals, and a processing circuit that calculates the distance to the target surface from the ratio of each electrical signal. This is an optical distance sensor characterized by the following.
以下第２図により本発明の一実施例を示す。An embodiment of the present invention will be shown below with reference to FIG.
（１）は２組の光ファイバーから構成される投光用光フ
ァイバーで、光源（２）は２つの発光ダイオード（ＬＥ
Ｄ）で、これらのＴ、 ＥＤは、２組の駆動回路（３）
によって点灯している。投光用ファイバー（１）から対
象面（４）に投光された光（９ａ）、（９ｂ）の反射光
の一部（１０ａ）、（１０ｂ）は受光用ファイバー（５
）を通じて光電変換素子（６）で受光され、電気信号Ｃ
に変換され２組の帯域フィルター（７）に入ノＪされる
。ここでの駆動信号Ａ、Ｂの周波数は相異なる様にされ
ており、帯域フィルタ（７）で各々の周波数の信号だけ
を検出するようにしているので帯域フィルタ（７）の出
力信号り、Ｅは光源（２）の２つのＬＥＤによる受光量
に比例した信号となる。(1) is a light emitting optical fiber consisting of two sets of optical fibers, and the light source (2) is two light emitting diodes (LE
D), these T and ED are two sets of drive circuits (3)
It is lit by. Some of the reflected lights (10a) and (10b) of the lights (9a) and (9b) projected from the light-emitting fiber (1) to the target surface (4) are reflected by the light-receiving fiber (5).
) is received by the photoelectric conversion element (6), and the electric signal C
and input into two sets of bandpass filters (7). The frequencies of the drive signals A and B here are different from each other, and only the signals of each frequency are detected by the bandpass filter (7), so the output signal of the bandpass filter (7) and E is a signal proportional to the amount of light received by the two LEDs of the light source (2).
光電変換素子と２組の帯域フィルタにより受光用ファイ
バーで受光された各投光用ファイバーによる対象面から
の反射光量を各々別個の電気信号に変換する光電変換手
段を構成しているのである。The photoelectric conversion element and two sets of bandpass filters constitute a photoelectric conversion means that converts the amount of light received by the light receiving fiber and reflected from the target surface by each light emitting fiber into separate electrical signals.
これらの信号り、Ｅは対象面（４）の反４・１率が変動
しても同じ比率を保ったまま変化し、その比率は光フア
イバ一端面と対象面間の距離によって変化する。（８）
は演算処理回路で、信号り、Ｅの比率から対象面（４）
までの距離をめて距離信号Ｆを出力する。These signals, E, change while maintaining the same ratio even if the inverse 4.1 ratio of the target surface (4) changes, and the ratio changes depending on the distance between one end surface of the optical fiber and the target surface. (8)
is an arithmetic processing circuit that calculates the target surface (4) from the ratio of the signal and E.
The distance signal F is output.
この発明の距離センサは、上述の如く２組の光源の光を
別々の投光用の光ファイノく−によって対象面に投光し
、その反射光を別の受光用光ファイバーを通して受光し
、各々の光源からの受光量信号の比率から距離をめてい
る為対象面の反射率が変動しても、受光量信号の比率は
変化せず、距離測定には影響しない。という効果がある
。As described above, the distance sensor of the present invention projects the light from two sets of light sources onto the target surface using separate optical fibers for projecting light, receives the reflected light through another optical fiber for receiving light, and receives the reflected light from each set of light sources through separate optical fibers for receiving light. Since the distance is determined based on the ratio of the received light amount signal from the light source, even if the reflectance of the target surface changes, the ratio of the received light amount signal does not change and does not affect the distance measurement. There is an effect.
）は（ａ）のＡ−Ａ面を、第２図（Ｃ）は（ａ）のＢ−
Ｂ面を示す。
第１図
第２図
（αン
Ｃ・) is the A-A side of (a), and Figure 2 (C) is the B- side of (a).
Side B is shown. Figure 1 Figure 2 (αnC・
Claims (1)
に対応した光源と投光された光の対象面からの反射光を
受光する受光用ファイバーと受光用ファイバーで受光さ
れた各投光用ファイバーによる対象面からの反射光取を
各々別個の電気信号に変換する光電変換手段と各々の電
気信号の比から対象面迄の距離を計算する処理回路から
構成されることを特徴とする光学式距離センサ。(1) Multiple sets of light emitting fibers, a light source corresponding to each light emitting fiber, a light receiving fiber that receives the reflected light from the target surface of the emitted light, and each light emitting light received by the light receiving fiber. An optical system characterized by comprising a photoelectric conversion means for converting the reflected light from the target surface by the optical fiber into separate electrical signals, and a processing circuit that calculates the distance to the target surface from the ratio of each electrical signal. distance sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15966183A JPS6050403A (en) | 1983-08-30 | 1983-08-30 | Distance sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15966183A JPS6050403A (en) | 1983-08-30 | 1983-08-30 | Distance sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6050403A true JPS6050403A (en) | 1985-03-20 |
Family
ID=15698575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15966183A Pending JPS6050403A (en) | 1983-08-30 | 1983-08-30 | Distance sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050403A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62110103A (en) * | 1985-04-30 | 1987-05-21 | メタテツク コ−ポレイシヨン | Optical fiber converter |
| FR2591330A1 (en) * | 1985-12-11 | 1987-06-12 | Crouzet Sa | Optoelectronic sensor of position and movement |
| JPH0440314A (en) * | 1990-06-05 | 1992-02-10 | Stanley Electric Co Ltd | Optical measuring instrument |
| WO1997017589A1 (en) * | 1995-11-03 | 1997-05-15 | Vincenzo Arrichiello | Method for measurement of distance of optoelectronic type and devices for the implementation of said method |
-
1983
- 1983-08-30 JP JP15966183A patent/JPS6050403A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62110103A (en) * | 1985-04-30 | 1987-05-21 | メタテツク コ−ポレイシヨン | Optical fiber converter |
| FR2591330A1 (en) * | 1985-12-11 | 1987-06-12 | Crouzet Sa | Optoelectronic sensor of position and movement |
| JPH0440314A (en) * | 1990-06-05 | 1992-02-10 | Stanley Electric Co Ltd | Optical measuring instrument |
| WO1997017589A1 (en) * | 1995-11-03 | 1997-05-15 | Vincenzo Arrichiello | Method for measurement of distance of optoelectronic type and devices for the implementation of said method |
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