JPS6140511A - Encoder - Google Patents
EncoderInfo
- Publication number
- JPS6140511A JPS6140511A JP16248684A JP16248684A JPS6140511A JP S6140511 A JPS6140511 A JP S6140511A JP 16248684 A JP16248684 A JP 16248684A JP 16248684 A JP16248684 A JP 16248684A JP S6140511 A JPS6140511 A JP S6140511A
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical fiber
- slit
- diffraction plate
- rotating body
- 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 14
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims 1
- 239000011651 chromium Substances 0.000 claims 1
- 230000006698 induction Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 241001553014 Myrsine salicina Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000009331 sowing 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
- G01D5/32—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 with attenuation or whole or partial obturation of beams of light
- G01D5/34—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
- G01D5/34715—Scale reading or illumination devices
- G01D5/34723—Scale reading or illumination devices involving light-guides
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
Description
【発明の詳細な説明】
０）産業上の利用分野
本発明はエンコーダに関するもので特にホトセンサを含
むエンコーダに関するものである。従来より知られてい
るホトセンサはホトインクラブタと反射型ホトセンサー
に区別されているが、本発明は後者すなわち反射型に関
連する。DETAILED DESCRIPTION OF THE INVENTION 0) Industrial Application Field The present invention relates to an encoder, and particularly to an encoder including a photo sensor. Conventionally known photosensors are classified into photoinclination photosensors and reflective type photosensors, and the present invention relates to the latter type, that is, the reflective type.
（ロ）従来技術
従来例のエンコーダは第３図に図示の様に通常光源が内
部に収納されている。すなわち発光素子ＬＤ％ＬＥＤ等
よりの光線はスリン）ｋ有する回転板２４．スリット付
固定板２６を介して受光素子（ホトトランジスター、Ｔ
）ＩＮ、Ｄ等）２８に到達する様に構成された内臓型で
ある。従ってこの様な構成に起因する必然的欠陥が発生
する。すなわち
（１） ＬＥＤやホトトランジスタ等の発光、受光素
子の寿命がくると取換えのためエンコーダを取りはずし
する必要があり、長寿命を補償できない。(B) Prior Art A conventional encoder normally has a light source housed inside, as shown in FIG. That is, the light rays from the light emitting elements LD% LED, etc. are transmitted through the rotary plate 24. A light receiving element (phototransistor, T
) IN, D, etc.) It is a built-in type configured to reach 28. Therefore, inevitable defects occur due to such a configuration. That is, (1) when the life of a light emitting or light receiving element such as an LED or a phototransistor reaches its end, the encoder must be removed for replacement, and a long life cannot be guaranteed.
（２）温度の高い部分は必然的に部品の寿命が短くなる
傾向がある。(2) High temperature areas tend to shorten the lifespan of parts.
（３）温度、湿度に起因する信号誤差を生じる。(3) Signal errors occur due to temperature and humidity.
（４）更に信号伝送するのに金属導体を利用している関
係上、外来誘導をうけやすいと共に伝送上の外来誘導に
より■、ＥＤ等に異常負荷がかかることもあり、！＊度
を向上させようとすれば、光の回折現象により検出不可
能となるばかりか構成上大型化し、寸法が全体に大きく
なる。(4) Furthermore, since metal conductors are used for signal transmission, they are susceptible to external induction, and external induction during transmission may cause an abnormal load on the ED, etc.! *If you try to improve the power, not only will it become impossible to detect due to the phenomenon of light diffraction, but the structure will also become larger and the overall dimensions will increase.
（）→ 発明の概要
本発明は前記の従来例に改良を加えたものでその概要を
添付第２図に図示する。■・Ｆ、Ｄ又はＴ、 ０等３２
の発光源より発光した光は、光ファイノ々ケーブル３４
ｆｆ：経由して干渉スリット金具えた回折板３６で回折
されて後、反射スリット部を具えた回転板３８の回転に
より、反射スリット部に反射したり又は反射せずにこれ
を通過したりする。このように反した光は干渉スリット
金具えた回折板３６で再び選別され、これを通過した光
は光ファイバケーブル４０に導かれて、ホトトランジス
タ又はＰＩＮ、］’）等の受光素子４２に到達し、信号
に変換される。発光素子、受光素子は外部に設け、この
両者の間に一対の光ファイバケーブル、回折板、回転体
（反射スリット部を有する）を介在させ、回転体で反射
した光を受光素子でうける構成を有するものである。( ) → Summary of the Invention The present invention is an improvement on the conventional example described above, and the outline thereof is shown in the attached FIG. 2. ■・F, D or T, 0 etc. 32
The light emitted from the light source is transmitted through the optical fiber cable 34.
ff: After being diffracted by the diffraction plate 36 equipped with an interference slit metal, the light is reflected at the reflection slit part or passes through it without being reflected by the rotation of the rotary plate 38 equipped with a reflection slit part. The reflected light is sorted again by the diffraction plate 36 equipped with an interference slit, and the light that has passed through this is guided to an optical fiber cable 40 and reaches a light receiving element 42 such as a phototransistor or PIN, ]'). , converted into a signal. The light-emitting element and the light-receiving element are provided outside, and a pair of optical fiber cables, a diffraction plate, and a rotating body (having a reflective slit part) are interposed between them, and the light-receiving element receives the light reflected by the rotating body. It is something that you have.
に）実施例
第１図は本発明に係わるエンコーダの断面図である。符
号１は後述する回転体６と共にベアリング１８に支承さ
れて回転する回転軸であり、ベアリング押え３はねじ２
により第１外部シェル４．ニ固定される。５は反射スリ
ット部を具えた回転体６を動かさないようにねじ１９に
より軸１に固定する役目をなす押え金である。干渉スリ
ット金具えた回折板７は前記回転体６に近接して設けら
れる。回転体６はガラス又は合成樹脂例えば透明プラス
チックよりなり、その表面に（回折板７の側に）ニッケ
ル又はクローム等の金属又は樹脂を蒸着又は接着し反射
体を形成し、等間隔に複数のスリットヲ設け、反射スリ
ット部を形成する。８は０リング、９は第１シエルと第
３シエル１３との間に介在する第２シエル、１０はフェ
ルール、１１はフェルール回転防止金具、１２はＯＩＪ
ソング１３は第゛３外部シェル、１４は０１Ｊング、１
５は光ファイバの押え金具、１６はワッシャ、１７はソ
゛ツシング％ １８はベアリング、１９はねじ、２０ａ
は光ファイバケーブル往路用、２０ｂは復路用光ファイ
バケーブルである。B) Embodiment FIG. 1 is a sectional view of an encoder according to the present invention. Reference numeral 1 is a rotating shaft that is supported by a bearing 18 and rotates together with a rotating body 6, which will be described later.
The first outer shell 4. D is fixed. Reference numeral 5 designates a presser foot that serves to fix the rotating body 6 provided with a reflective slit portion to the shaft 1 with a screw 19 so as not to move. A diffraction plate 7 equipped with interference slit metal is provided close to the rotating body 6. The rotating body 6 is made of glass or a synthetic resin, such as a transparent plastic, and a metal such as nickel or chrome or resin is vapor-deposited or adhered to the surface (on the side of the diffraction plate 7) to form a reflector, and a plurality of slits are formed at equal intervals. to form a reflective slit section. 8 is an O ring, 9 is a second shell interposed between the first shell and the third shell 13, 10 is a ferrule, 11 is a ferrule rotation prevention fitting, and 12 is an OIJ
Song 13 is the third outer shell, 14 is 01J song, 1
5 is an optical fiber holding fitting, 16 is a washer, 17 is a sowing percentage, 18 is a bearing, 19 is a screw, 20a
20b is an optical fiber cable for the outward route, and 20b is an optical fiber cable for the return route.
次に本笑施例の作用について説明する。ＬＤ又はＬＥＤ
等で発光した光は光ファイバケーブル２０ａ中を伝達し
フェルール１０申全通って固定板７の干渉スリットに到
達する。干渉スリットにおいて光は鋭いスポット径の小
さい光となる。回折板にはこの光が反射されないように
反射防止音節し。Next, the operation of this embodiment will be explained. LD or LED
The emitted light is transmitted through the optical fiber cable 20a, passes through the entire ferrule 10, and reaches the interference slit of the fixing plate 7. At the interference slit, the light becomes sharp and has a small spot diameter. The diffraction plate has anti-reflection syllables to prevent this light from being reflected.
光は一方向にのみ通過する。前記回折板干渉スリツｌｔ
−通過した光は、回転体６の反射スリット部において回
転体の回転位置により反射されたり。Light passes in one direction only. Said diffraction plate interference slit lt
- The transmitted light is reflected by the rotating position of the rotating body at the reflection slit portion of the rotating body 6.
反射されなかったりするが、反射されない場合の通過光
は全て回転体に吸収されるようになるために反射防止を
回転体の反射部の裏面に一様に施す。Although it may not be reflected, all of the passing light that is not reflected is absorbed by the rotating body, so anti-reflection is applied uniformly to the back surface of the reflective part of the rotating body.
反射した光は回折板６の干渉スリットで再び選別され、
ここ全通過した光は復路用光ファイバケーブル２０ｂに
導かれ、この中を伝送さ、れて、受光器（例えばホ））
ランジスタ）まで導かれ、信号に変換される。The reflected light is sorted again by the interference slit of the diffraction plate 6,
All the light that has passed through here is guided to the return optical fiber cable 20b, transmitted through it, and sent to a light receiver (for example, E).
transistor) and is converted into a signal.
（ホ）効果 前記従来例と比較して次の様な特長、効果を有する。(e) Effect It has the following features and effects compared to the conventional example.
（１）構造が簡単で製作が容易である。(1) It has a simple structure and is easy to manufacture.
（２）構成部品数が少なく、小さくできるので、全体が
小型化される。(2) Since the number of component parts is small and the size can be reduced, the overall size can be reduced.
（３）ＬＤ又はＬＥＤの発光、受光素子をエンコーダ本
体と別に離して配置しているので、温度、湿度等の変化
や外部誘導に影響されない。(3) Since the LD or LED light emitting and light receiving elements are placed separately from the encoder body, they are not affected by changes in temperature, humidity, etc., or external induction.
（４）採用する光スポツト径が小さいので高精度の検出
ができる。(4) Since the optical spot diameter used is small, highly accurate detection is possible.
（５）伝送に光ファイバケーブルを採用しているので、
外米誘導、その他電気伝送の場合に生じる不具合ヲ彦＜
すことができる。(5) Optical fiber cable is used for transmission, so
Problems that may occur in the case of foreign guidance or other electrical transmission.<
can be done.
（６） ＬＥＤ％ＬＤ％等の発光、受光素子の寿命が
きてもこれらの部品全取換えるだけで、エンコーダ全体
をとり外す必要がないので長寿命が補償される。(6) Even when the lifespan of the light emitting and light receiving elements such as LED%LD% etc. is reached, a long lifespan is ensured by simply replacing all of these parts and there is no need to remove the entire encoder.
（７）精度が低い場合でも従来のエンコーダと同原理に
工り対応できる。(7) Even if the accuracy is low, it can be processed using the same principle as conventional encoders.
第１図は本発明に係わるエンコーダの断面図。
第２図は本発明の原理を示す路線配設図。
第３図は従来例のエンコーダの原理を示す路線配設図で
ある。
１・・・回転軸
６・・・回転体
７・・・回斤板
１０・・・フェルール
１１・・・フェルール回転防止金具
２０ａ・・・光ファイバ（往路用）
２０ｂ・・・ 〃 （復路用
特許出願人 株式会社デルファイ
代理人 弁理士 小 林 栄−〜吟すＣψト
ロ０？＝対口
第２図
３４ フチイノぐケーフ″ル
第３図
手続補正書
昭和５９年８月２２日
昭和 ５９年特 許 願第 １６２４８６号２、発明
の名称 エンコーダ
３、 補正をする者
事件との関係 特許出願人
４、代理人〒１６０
５、補正命令の日付
６、 補正により増加する発明の数
１７、補正の対象FIG. 1 is a sectional view of an encoder according to the present invention. FIG. 2 is a route layout diagram showing the principle of the present invention. FIG. 3 is a route layout diagram showing the principle of a conventional encoder. 1... Rotating shaft 6... Rotating body 7... Rotating plate 10... Ferrule 11... Ferrule rotation prevention fitting 20a... Optical fiber (for outward trip) 20b... (For return trip) Patent Applicant: Delphi Co., Ltd. Agent Patent Attorney: Sakae Kobayashi - ~ Ginsu Cψ Toro 0? Patent Application No. 162486 2, Title of the invention Encoder 3, Relationship with the case of the person making the amendment Patent applicant 4, Attorney 〒160 5, Date of amendment order 6, Number of inventions increased by the amendment
17. Subject of correction
Claims (1)
りの光が往路用光ファイバをへて回折される干渉スリッ
トを具えた回折板と前記光がその回転に応じて反射又は
通過自在の反射スリット部を具えた回転体と前記回転体
で反射して前記回折板を通過して光が導かれる復路用光
ファイバケーブルとを有するエンコーダ。 ２、ガラス又は透明合成樹脂よりなり、その上面にニッ
ケル又はクローム等の金属を蒸着又は接着し、前記金属
に等間隔に複数のスリットを設けた反射スリット部を有
する回転体を具えた特許請求の範囲第１項に記載のエン
コーダ。[Claims] 1. A light emitting element and a light receiving element are disposed outside, and a diffraction plate is provided with an interference slit through which light from the light emitting element is diffracted through an outbound optical fiber, and the light is rotated. 1. An encoder comprising: a rotating body having a reflective slit portion that can be reflected or passed through depending on the rotational body; and a return optical fiber cable through which light is guided after being reflected by the rotating body and passing through the diffraction plate. 2. A rotating body made of glass or transparent synthetic resin, with a metal such as nickel or chromium deposited or adhered on its upper surface, and having a reflective slit section with a plurality of equally spaced slits in the metal. The encoder according to range 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16248684A JPS6140511A (en) | 1984-07-31 | 1984-07-31 | Encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16248684A JPS6140511A (en) | 1984-07-31 | 1984-07-31 | Encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6140511A true JPS6140511A (en) | 1986-02-26 |
Family
ID=15755527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16248684A Pending JPS6140511A (en) | 1984-07-31 | 1984-07-31 | Encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6140511A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02177993A (en) * | 1988-12-29 | 1990-07-11 | Yokoyama Kogyo Sewing Mach Kk | Formation of hole darning opening for cloth |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5687818A (en) * | 1979-12-19 | 1981-07-16 | Ishikawajima Harima Heavy Ind Co Ltd | Reflex type position detector |
| JPS57111509A (en) * | 1980-12-29 | 1982-07-12 | Nippon Telegr & Teleph Corp <Ntt> | Fine space positioning device of information retrieval device |
-
1984
- 1984-07-31 JP JP16248684A patent/JPS6140511A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5687818A (en) * | 1979-12-19 | 1981-07-16 | Ishikawajima Harima Heavy Ind Co Ltd | Reflex type position detector |
| JPS57111509A (en) * | 1980-12-29 | 1982-07-12 | Nippon Telegr & Teleph Corp <Ntt> | Fine space positioning device of information retrieval device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02177993A (en) * | 1988-12-29 | 1990-07-11 | Yokoyama Kogyo Sewing Mach Kk | Formation of hole darning opening for cloth |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3203643B2 (en) | Reflective encoder | |
| US4808812A (en) | Composite type light sensor having plural sensors with different light receiving angle optical characteristics | |
| US7034282B2 (en) | Optical rotary encoder | |
| US5483059A (en) | Signal processing method using comparator level adjustment in a displacement measuring device | |
| US8704154B2 (en) | Non-contact probe with an optical filter and measuring machine including the same | |
| US7589317B2 (en) | Optical encoder having lens integrally molded with housing | |
| CN101300462A (en) | Opto-electrical angle measuring apparatus | |
| JPS6140511A (en) | Encoder | |
| WO2014192554A1 (en) | Illumination device and reflection-characteristics measurement device | |
| TWI740037B (en) | Light receiving module and encoder for encoder | |
| US4795899A (en) | Illumination sensor with attenuating diffuser | |
| JPS6140510A (en) | Encoder | |
| JP3694800B2 (en) | Optical encoder | |
| JPH0562881U (en) | Reflective photoelectric switch | |
| JPH0755506A (en) | Photoelectric encoder | |
| JPH0529850B2 (en) | ||
| JPH11142187A (en) | Rotary encoder | |
| US20220178682A1 (en) | Optical Rotary Sensor | |
| JPH04238223A (en) | Position detecting device | |
| JPH0257678B2 (en) | ||
| JP2000221057A (en) | Photo-sensor | |
| JPH0197814A (en) | Optical displacement detector | |
| JPH0326773B2 (en) | ||
| CN117470284A (en) | Optical analog potentiometer | |
| JPS61246621A (en) | Encoder |