JPS59180408A - Optical position detector - Google Patents
Optical position detectorInfo
- Publication number
- JPS59180408A JPS59180408A JP5616583A JP5616583A JPS59180408A JP S59180408 A JPS59180408 A JP S59180408A JP 5616583 A JP5616583 A JP 5616583A JP 5616583 A JP5616583 A JP 5616583A JP S59180408 A JPS59180408 A JP S59180408A
- Authority
- JP
- Japan
- Prior art keywords
- light
- fiber bundle
- receiving fiber
- photoelectric converter
- light source
- 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
Classifications
-
- 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
- G01B11/028—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring lateral position of a boundary of the object
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、たとえば物体の変位や液体の液位等を光学的
手段によって検出する光学的位置検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical position detection device that detects, for example, the displacement of an object or the level of a liquid by optical means.
一般に、物体の変位や液体の液位等の被検体の位置を光
学的手段によって検出づ−る検出装置は、周知のＪ：う
に光の伝送媒体である光ファイバを用いたものが従来よ
り多用されている。In general, detection devices that use optical means to detect the position of a subject such as the displacement of an object or the level of a liquid are those that use optical fibers, which are the transmission medium for the well-known J: sea urchin light. has been done.
第１図は光フッフィバを用いた従来の検出装置の一例を
示す図で、通称゛″ピツ〜式″と称されているものであ
る。同図において１は光源、２８〜２ｅは被検体である
物体４の変位方向く矢印Ｘ）に沿って１列に配列された
複数の光ファイバ、３ａ〜３ｃはこれら光ファイバ２ａ
〜２ｅにそれぞれ対応する光電変換器で、たとえばフォ
トダイオード等が用いられている。すなわち、この検出
装置は物体４の変位方向に冶って１列に配列された光フ
ァイバ２８〜２ｅによって光源１からの光を受光し、光
ファイバ２８〜２ｅで受光した光を光電変換器３ａ〜３
ｅで電気信号に変換することにより、これらの光電変換
器３ａ〜３ｅの出力状態（オン・オフ状態）によって不
図示の検出部が物体４の端面位置を検出している。FIG. 1 is a diagram showing an example of a conventional detection device using an optical fiber, which is commonly referred to as a "pitch type". In the figure, 1 is a light source, 28 to 2e are a plurality of optical fibers arranged in a line along the direction of displacement of an object 4 (arrow X), and 3a to 3c are optical fibers 2a.
-2e, for example, a photodiode or the like is used as the photoelectric converter. That is, this detection device receives light from the light source 1 through the optical fibers 28 to 2e arranged in a row in the direction of displacement of the object 4, and converts the light received by the optical fibers 28 to 2e into the photoelectric converter 3a. ~3
By converting the signal into an electric signal at e, a detection section (not shown) detects the end surface position of the object 4 based on the output state (on/off state) of these photoelectric converters 3a to 3e.
ところが、このような従来の検出装置においては光電変
換器３ａ〜３ｅの出力状態によって被検体の位置を検出
していたので、被検体の連続した位置変化を高精度に検
出できないという欠点があった。However, in such conventional detection devices, the position of the subject was detected based on the output states of the photoelectric converters 3a to 3e, so there was a drawback that continuous positional changes of the subject could not be detected with high precision. .
本発明は上記の事情に基づいてなされたものであり、被
検体の連続した位置変化を高精度に検出できる光学的位
置検出装置を提供することを目的とするものである。The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to provide an optical position detection device that can detect continuous positional changes of a subject with high precision.
本発明は上記の目的を達成するために、多数の同径光フ
ァイバを千鳥格子状または７１〜リツクス状に配列して
矩形状に形成した受光面を右する受光ファイバ束で受光
した光を光電変換器で受光量に応じた電気信号に変換し
、この電気信号の電圧値に基づいて光源と受光ファイバ
束の光路中に介在する被検体の位置を検出づ−るように
したことを特徴としている。In order to achieve the above object, the present invention has a rectangular light receiving surface formed by arranging a large number of optical fibers of the same diameter in a houndstooth pattern or a 71 to 60-thick pattern. A photoelectric converter converts the amount of received light into an electrical signal, and based on the voltage value of this electrical signal, the position of the object interposed in the optical path between the light source and the light-receiving fiber bundle is detected. It is said that
以下、本発明の一実施例を図面を参照して説明する。Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第２図は本発明の一実施例である光学的位置検出装置の
概略構成を示す図で、図中第１図と同一部分には同一符
号が付されている。同図において旬月１ｏは光源１から
の直接光を受光面１０ａより受光しＣ光電変換器３に導
く受光ファイバ束である。この受光ファイバ束１０の受
光面１０ａは例えば第３図に示すように多数の同径の光
ファイバ２ａ、２ｂ、２ｃ、・・・を千鳥格子状に密接
して配列し、全体が矩形状になるよう形成されている。FIG. 2 is a diagram showing a schematic configuration of an optical position detecting device according to an embodiment of the present invention, in which the same parts as in FIG. 1 are given the same reference numerals. In the figure, a light-receiving fiber bundle 1o receives direct light from a light source 1 through a light-receiving surface 10a and guides it to a C photoelectric converter 3. The light-receiving surface 10a of the light-receiving fiber bundle 10 has a large number of optical fibers 2a, 2b, 2c, . It is formed to be.
また光電変換器３は同図に承り如くリード線１１を介し
て検出部１２に接続されている。検出部１２は周知の構
成からなり、光電変換器３の出力変化、すなわち電圧変
化に基づいて物体４の位置を検出するものである。Further, the photoelectric converter 3 is connected to the detection section 12 via a lead wire 11 as shown in the figure. The detection unit 12 has a well-known configuration and detects the position of the object 4 based on changes in the output of the photoelectric converter 3, that is, changes in voltage.
次に本実施例の動作について説明する。Next, the operation of this embodiment will be explained.
第４図は物体４の位置に応じた光電変換器３の出力を承
り波形図である。同図に示すように、物体４の一端面が
光源１と受光ファイバ束１０の光路中に介在していない
ときはくＡからＢ）、光電変換器３の出力は最大レベル
を示し、一定となっている。つぎに物体４の一端面が光
源１と受光ファイバ束１０の光路の一端（Ｂ）に差しか
かると、光電変換器３の出力は被検体４が光源１と受光
ファイバ束１０の光路中（ＢがらＣ）を移動するにつれ
て出力レベルが低下１−る。FIG. 4 is a waveform diagram of the output of the photoelectric converter 3 according to the position of the object 4. As shown in the figure, when one end surface of the object 4 is not interposed in the optical path between the light source 1 and the receiving fiber bundle 10 (from A to B), the output of the photoelectric converter 3 shows the maximum level and remains constant. It has become. Next, when one end surface of the object 4 approaches one end (B) of the optical path between the light source 1 and the light-receiving fiber bundle 10, the output of the photoelectric converter 3 indicates that the object 4 is in the optical path (B) between the light source 1 and the light-receiving fiber bundle 10. The output level decreases as the position C) is moved.
つぎに物体４の一端面が光源１と受光ファイバ束１０の
光路終ｇｌ（Ｃ）に差しかかると、受光ファイバ束１０
には光源１からの直接光が物体４によって遮られるので
、光電変換器３の出力は最小レベル（０レベル）となる
。ここで、物体４が光源１と受光ファイバ束１ｏの光路
中に介在ジるとき（ＢからＣ）の受光ファイバ束１゜に
人的する光ｍ１からの入射光量は、被検体くの介在面積
に応じて線形的に変化覆る。したがって、この時（Ｂか
らＣ）の光電変換器３のＩＪｊ力変化は同図に示す如く
線形となる。Next, when one end surface of the object 4 approaches the end of the optical path gl (C) between the light source 1 and the light receiving fiber bundle 10, the light receiving fiber bundle 10
Since the direct light from the light source 1 is blocked by the object 4, the output of the photoelectric converter 3 is at the minimum level (0 level). Here, when the object 4 is interposed in the optical path of the light source 1 and the light receiving fiber bundle 1o (from B to C), the amount of light incident from the light m1 to the light receiving fiber bundle 1° is calculated by the intervening area of the subject. Changes linearly depending on the cover. Therefore, the IJj force change of the photoelectric converter 3 at this time (from B to C) becomes linear as shown in the figure.
したがって、この光電変換器３の出力変化〈電圧変化）
を検出部１２で検出することにより光源１と受光ファイ
バ束１０の光路中（ＢからＣ）に介在Ｊる物体４の連続
した位置変化を高精度に検出できる。Therefore, the output change (voltage change) of this photoelectric converter 3
By detecting this with the detection unit 12, continuous positional changes of the object 4 interposed in the optical path (from B to C) between the light source 1 and the light-receiving fiber bundle 10 can be detected with high precision.
なお、本実施例では受光ファイバ束１０の受光面１０ａ
を多数の同径の光ファイバ２ａ。Note that in this embodiment, the light receiving surface 10a of the light receiving fiber bundle 10
A large number of optical fibers 2a having the same diameter.
２ｂ、２ｃ・・・を千鳥格子状に密接して配列したが、
第４図に示す如くマトリックス状に配列して矩形の受光
面１０ａを形成してもよい。2b, 2c... were arranged closely in a houndstooth pattern,
As shown in FIG. 4, they may be arranged in a matrix to form a rectangular light-receiving surface 10a.
また、光源１からの反射光を利用して物体４の位置を検
出づる場合は、第呑図に示すように配
に市ｌ：設し、物体４を反射率が異なるテーブル１３の
上に載せて検出り−ればよい。In addition, when detecting the position of the object 4 by using the reflected light from the light source 1, the object 4 is placed on the table 13 having a different reflectance as shown in the figure. All you have to do is detect it.
以上）ホべたように本発明によれは、多数の同径光ファ
イバを千鳥格子状またはマトリックス状に各々密接する
ように配列して矩形状に形成した受光面を右する受光フ
ァイバ束で受光した光を光電変換器により受光量に応じ
た電気信号に変換し、この電気信号の電圧値に基づいて
光源と受光ファイバ束の光路中に介在する被検体の位置
を検出部るようにしたので、被検体の連続した位置変化
を高精度に検出できるという効果が得られる。As mentioned above, according to the present invention, light is received by a bundle of light-receiving fibers on the right side of a light-receiving surface formed in a rectangular shape by arranging a large number of optical fibers of the same diameter in close proximity to each other in a houndstooth pattern or matrix pattern. The detected light is converted into an electrical signal according to the amount of light received by a photoelectric converter, and the position of the object interposed in the optical path between the light source and the receiving fiber bundle is detected based on the voltage value of this electrical signal. , the effect that continuous positional changes of the subject can be detected with high precision can be obtained.
第１図は従来の光学的位置検出装置の一例を示′１１概
略格成図、第２図〜第４図はいずれも本−発明の一実施
例を示し、第２図は光学的位置検出装置の概略構成図、
第３図は受光ファイバ束の受光面を示す第２図の×−Ｘ
′線側面図、第４図は光電変換器の出力変化を示４波形
図、第５図は受光フンフィバ束の受光面の他の例を示す
平面図、第６図は反射光を利用した場合の実施例を示Ｊ
平面図である。
１・・・光源、３・・・光電変換器、４・・・物体、１
０・・・受光ファイバ束。
出願人代理人 弁理士 鈴江武彦
第３図 第５図
第４図
第６図Fig. 1 shows an example of a conventional optical position detection device; Figs. 2 to 4 each show an embodiment of the present invention; Schematic configuration diagram of the device,
Figure 3 shows the light-receiving surface of the light-receiving fiber bundle.
Figure 4 is a four-waveform diagram showing output changes of the photoelectric converter, Figure 5 is a plan view showing another example of the light receiving surface of the light-receiving fiber bundle, and Figure 6 is a case where reflected light is used. An example of J
FIG. 1... Light source, 3... Photoelectric converter, 4... Object, 1
0... Light receiving fiber bundle. Applicant's agent Patent attorney Takehiko Suzue Figure 3 Figure 5 Figure 4 Figure 6
Claims (1)
に各々密接するように配列して形成した矩形状の受光面
を有する受光ファイバ束と、この受光ファイバ束の受光
領域内に介在する被検体に対して光を照射する光源と、
前記受光ファイバ束によって受光した光を受光量に応じ
た電気信号に変換する光電変換器と、この光電変換器で
得られた電気信号の信号値に基づいて前記受光ファイバ
束の受光領域内における被検体の位置を検出する検出手
段とを具備してなる光学的位置検出装置。A light-receiving fiber bundle having a rectangular light-receiving surface formed by arranging a plurality of optical fibers in close contact with each other in a houndstooth pattern or a matrix shape, and a subject interposed within the light-receiving area of this light-receiving fiber bundle. a light source that emits light;
a photoelectric converter that converts the light received by the light-receiving fiber bundle into an electrical signal according to the amount of light received; An optical position detection device comprising: detection means for detecting the position of a specimen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5616583A JPS59180408A (en) | 1983-03-31 | 1983-03-31 | Optical position detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5616583A JPS59180408A (en) | 1983-03-31 | 1983-03-31 | Optical position detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59180408A true JPS59180408A (en) | 1984-10-13 |
Family
ID=13019474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5616583A Pending JPS59180408A (en) | 1983-03-31 | 1983-03-31 | Optical position detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59180408A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996023199A1 (en) * | 1995-01-25 | 1996-08-01 | Industrial Innovation And Development Limited | Method and apparatus for detecting an object |
| CN102175159A (en) * | 2011-01-24 | 2011-09-07 | 中国科学院半导体研究所 | Multistage micro-displacement sensor probe with high accuracy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS529450B2 (en) * | 1974-02-09 | 1977-03-16 | ||
| JPS52126850A (en) * | 1976-04-16 | 1977-10-25 | Toshiba Corp | Method of indicating elevator position |
-
1983
- 1983-03-31 JP JP5616583A patent/JPS59180408A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS529450B2 (en) * | 1974-02-09 | 1977-03-16 | ||
| JPS52126850A (en) * | 1976-04-16 | 1977-10-25 | Toshiba Corp | Method of indicating elevator position |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996023199A1 (en) * | 1995-01-25 | 1996-08-01 | Industrial Innovation And Development Limited | Method and apparatus for detecting an object |
| CN102175159A (en) * | 2011-01-24 | 2011-09-07 | 中国科学院半导体研究所 | Multistage micro-displacement sensor probe with high accuracy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4439672A (en) | Control system for automated manipulator device | |
| US4523092A (en) | Fiber optic sensors for simultaneously detecting different parameters in a single sensing tip | |
| GB2133139A (en) | Touch sensitive device | |
| US4385028A (en) | System for controlling position and movement of manipulator device from absolute distance data standard | |
| JPS59180408A (en) | Optical position detector | |
| US4314760A (en) | Optical sensing device | |
| CN1094200C (en) | Detector for X-ray tomography apparatus | |
| JPS5819512A (en) | Detecting device for interface position | |
| JPS5828615A (en) | Measuring device for extent of shift | |
| JPH0210423Y2 (en) | ||
| JP3256764B2 (en) | Wide range position detector | |
| JPS62237329A (en) | Illuminance sensor | |
| JPS54116821A (en) | Photo detector | |
| JPS57108621A (en) | Photoelectric length measure | |
| JPS62225065A (en) | Contact type image sensor | |
| EP0240277A3 (en) | Photosensor | |
| JPS59180409A (en) | Optical position detecting device | |
| JPH1130531A (en) | Non-contact position and displacement measuring device | |
| JP2002148102A (en) | Detector and method for detecting liquid | |
| JPH0619248Y2 (en) | Read Sensor-Head | |
| JPS6113110A (en) | Vibration sensor | |
| KR100295605B1 (en) | Analog solar sensor | |
| JPS62195610A (en) | Photodetecting device | |
| JPS61266917A (en) | Encoder | |
| JPH04142415A (en) | Solar sensor |