JPS6055225A - Rotary encoder - Google Patents
Rotary encoderInfo
- Publication number
- JPS6055225A JPS6055225A JP16363783A JP16363783A JPS6055225A JP S6055225 A JPS6055225 A JP S6055225A JP 16363783 A JP16363783 A JP 16363783A JP 16363783 A JP16363783 A JP 16363783A JP S6055225 A JPS6055225 A JP S6055225A
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical fiber
- rotary encoder
- light emitting
- signal
- 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 30
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 108091008695 photoreceptors Proteins 0.000 claims 4
- 230000008054 signal transmission Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、ロータリエンコーダに関し、一層詳細には
、多数のスリットが穿設された回転円板を介して間欠的
に送給されてくる発光素子からの光を光ファイバーによ
って受け、この光を離間する受光素子に伝送して電気的
信号として取り出すようにしたロータリエンコーダに関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary encoder, and more particularly, the present invention relates to a rotary encoder, and more specifically, it uses an optical fiber to transmit light from a light emitting element that is intermittently sent through a rotating disk having a large number of slits. The present invention relates to a rotary encoder that receives light, transmits the light to a separated light receiving element, and extracts it as an electrical signal.
位置検出、角度検出、速度や回転ムラの測定等のために
各種のロータリエンコーダが用いられている。ロータリ
エンコーダは、一般的には細かいスリットが穿設された
円板の回転により光源からの光を断続的に受光素子にぶ
つけてパルス信号を得るように構成したものである。Various rotary encoders are used for position detection, angle detection, measurement of speed and rotational unevenness, etc. A rotary encoder is generally configured so that light from a light source is intermittently impinged on a light receiving element to obtain a pulse signal by rotating a disk in which fine slits are formed.
然しなから、従来のロータリエンコーダでは、発光素子
並びに受光素子は、ロータリエンコーダの内部に配置さ
れており、しかもこれらの素子に付随する電気回路も同
様にエンコーダ、内に装着される構造が採用されてきた
。このため、ロータリエンコーダ全体としてもＯＡ機器
、ロボットの如（小型化をめる技術分野に十分に対応で
きない不都合があった。However, in conventional rotary encoders, the light emitting element and the light receiving element are arranged inside the rotary encoder, and the electric circuits associated with these elements are also installed inside the encoder. It's here. For this reason, the rotary encoder as a whole has the disadvantage of not being able to adequately respond to technical fields that require miniaturization, such as office automation equipment and robots.
さらにまた、受光素子と検知制御装置との間が相当距離
々間しているために、光信号から電気信号に変えられて
伝送される間に周囲のノイズの影響を受けやすく、この
ために、正確な制御を達成しようとする時、ノイズ除去
のための電気回路を新たに付設しなければならない等の
欠点があった。Furthermore, since there is a considerable distance between the light receiving element and the detection control device, it is easy to be affected by surrounding noise while the optical signal is converted into an electrical signal and transmitted. When trying to achieve accurate control, there are drawbacks such as the need to newly install an electric circuit for noise removal.
そこで、本発明者等は、鋭意考究を重ねた結果、近年、
情報伝達のために普及の著しい光ファイバーに着目し、
回転円板のスリットに対して光ファイバーの先端部を臨
ませ、発光素子からの断続的な光をこの光ファイバーで
受けた後、所定距離光信号のままで伝送し次いで光信号
を電気信号に変換するよう構成すれば、ロータリエンコ
ーダ自体が極めて小型化できると共に信号伝送途上にお
いて各種ノイズにも影響の蒙ることの少ない装置が得ら
れ、前記の不都合が一挙に解消することが判った。Therefore, as a result of extensive research, the present inventors have recently discovered
Focusing on optical fiber, which is rapidly becoming popular for information transmission,
The tip of the optical fiber is placed facing the slit of the rotating disk, and after receiving intermittent light from the light emitting element through the optical fiber, it is transmitted as an optical signal over a predetermined distance, and then the optical signal is converted into an electrical signal. It has been found that with such a configuration, the rotary encoder itself can be made extremely compact, and a device that is less affected by various noises during signal transmission can be obtained, and the above-mentioned disadvantages can be solved at once.
従って、本発明の目的は、小型で廉価な、しかもノイズ
に影響されないロークリエンコーダを提供することにあ
る。Therefore, an object of the present invention is to provide a low-resolution encoder that is small, inexpensive, and unaffected by noise.
前記の目的を達成するために、本発明は、駆動軸により
回転する複数本のスリットが穿設された回転円板の一側
面に前記スリットに対応して発光体を配設すると共に回
転円板の他側面に前記発光体に対峙する受光体を配設し
、さらに前記受光体を受光素子を含む受光装置に接続す
ることを特徴とする。In order to achieve the above-mentioned object, the present invention provides a rotating disk which is rotated by a drive shaft and has a plurality of slits, and a light emitting body is disposed on one side of the rotating disk in correspondence with the slits. A light receiving body facing the light emitting body is disposed on the other side, and the light receiving body is further connected to a light receiving device including a light receiving element.
次に、本発明に係るロータリエンコーダにつき好適な実
施例を挙げ、添付の図面を参照しながら以下詳細に説明
する。Next, preferred embodiments of the rotary encoder according to the present invention will be described in detail with reference to the accompanying drawings.
第１図において、参照符号１０は、ロータリエンコーダ
を示し、このロータリエンコータ１０は、モータ等の回
転駆動軸１２に軸支された回転円板１４を含む。回転円
板１４には円周方向に多数のスリット１６が穿設されて
いると共にその一側面には前記スリット１６に対応して
発光素子１８を近設配置する。In FIG. 1, reference numeral 10 indicates a rotary encoder, and the rotary encoder 10 includes a rotating disk 14 supported by a rotary drive shaft 12 such as a motor. A large number of slits 16 are formed in the rotating disk 14 in the circumferential direction, and light emitting elements 18 are arranged close to one side of the rotary disk 14 in correspondence with the slits 16.
一方、前記回転円板１４の他側面には、同様にスリット
ｆ６に対応して光ファイバー２０の一方の端部を臨ませ
、他方の端部は、前記ロークリエンコーダ１０より外部
へ導出して受光装置２２に光学的に接続する。すなわち
、受光装置２２にはフォトトランジスタあるいはフォト
ダイオード等からなる受光素子２４を内装し、この受光
素子２４の受光面に前記光ファイバー２０の他端部を臨
ませる。On the other hand, one end of the optical fiber 20 faces the other side of the rotating disk 14 corresponding to the slit f6, and the other end is led out from the low-return encoder 10 to receive light. optically connected to device 22; That is, the light receiving device 22 includes a light receiving element 24 made of a phototransistor, a photodiode, etc., and the other end of the optical fiber 20 faces the light receiving surface of the light receiving element 24.
本発明は、基本的には以上のように構成されるものであ
って、次に、その作用について説明する。The present invention is basically constructed as described above, and its operation will be explained next.
図示しない電源回路から送給される電力によって発光素
子１８が発光し、その光を回転円板１４に照射すると高
速度で回転する回転円板１４のスリット１６によりその
光は断続的な光信号に変換される。この光信号は、光フ
ァイバー２０の一方の先端部で受光され、光フアイバー
２０内を伝送されて受光装置２２に導入される。前記受
光装置２２では、受光素子２４により電気信号に変換さ
れ外部に導出される。The light emitting element 18 emits light by power supplied from a power supply circuit (not shown), and when the light is irradiated onto the rotating disk 14, the light is converted into an intermittent optical signal by the slit 16 of the rotating disk 14, which rotates at high speed. converted. This optical signal is received at one end of the optical fiber 20, transmitted within the optical fiber 20, and introduced into the light receiving device 22. In the light receiving device 22, the light receiving element 24 converts the signal into an electrical signal and outputs it to the outside.
この実施例では、光信号から電気信号へ変換を行う受光
装置をロータリエンコーダの外部に配置構成したので、
ロータリエンコーダ自体の小型化が達成できるぽかりか
光ファイバーにより光のままで信号の伝送が行われるた
めにノイズの影響が回避できる利点がある。In this embodiment, the light receiving device that converts optical signals into electrical signals is arranged outside the rotary encoder.
The rotary encoder itself can be miniaturized, and signals are transmitted in the form of light using optical fibers, which has the advantage of avoiding the effects of noise.
第２図に本発明に係るロークリエンコーダの別の実施例
を示し、この実施例において、前記実施例と同一の参照
符号は、同一の構成要素を示すものとする。FIG. 2 shows another embodiment of the low-resolution encoder according to the present invention, and in this embodiment, the same reference numerals as in the previous embodiment indicate the same components.
この実施例では、発光素子をロータリエンコーダの外部
に配置した。すなわち、回転円板１４の一方の側面にそ
のスリット１６に対応して第２の光ファイバー３０の一
方の先端部を臨ませ、この光ファイバー３０の他方の先
端部をロータリエンコーダ１０の外部に配設された発光
素子１８に臨むように構成している。In this example, the light emitting element was placed outside the rotary encoder. That is, one tip of the second optical fiber 30 is made to face one side of the rotating disk 14 in correspondence with the slit 16, and the other tip of the optical fiber 30 is disposed outside the rotary encoder 10. It is configured so as to face the light emitting element 18.
従って、前記発光素子１８からの光は、光ファイバー３
０によって回転円板１４に送られ直接光ファイバー３０
からの光がスリット１６を通過して他の光ファイバー２
０により受光されることになる。Therefore, the light from the light emitting element 18 is transmitted to the optical fiber 3.
0 to the rotating disk 14 directly into the optical fiber 30
The light from the optical fiber passes through the slit 16 and connects to the other optical fiber 2.
0 will be received.
この実施例では、ロータリエンコーダ１０自体は、回転
円板と光ファイバーのみによって基本的に構成されてい
るために、小型化が一層促進されるし、電気的配線もエ
ンコーダ内では減らすことができるため製造工数も少な
くなる利点がある。In this embodiment, the rotary encoder 10 itself basically consists of only a rotating disk and an optical fiber, which further promotes miniaturization, and reduces electrical wiring within the encoder. This has the advantage of reducing man-hours.
第３図に本発明のさらにまた別の実施例を示す。この実
施例においても、第１図並びに第２図に示した参照符号
と同一の参照符号は、同一の構成要素をを示すものとす
る。FIG. 3 shows yet another embodiment of the present invention. Also in this embodiment, the same reference numerals as those shown in FIGS. 1 and 2 indicate the same components.
さて、この実施例では、従来装置と同様に発光素子１８
と受光素子４０とを回転円板１４を挟んで対峙させた。Now, in this embodiment, like the conventional device, the light emitting element 18
and the light-receiving element 40 were made to face each other with the rotating disk 14 in between.
そこで、受光素子４０には電気信号／光信号変換器４２
を接続すると共にこの変換器４２から光ファイバー４４
を導出してその端部を受光装置２２内の受光素子２４に
臨ませている。Therefore, the light receiving element 40 is equipped with an electrical signal/optical signal converter 42.
and an optical fiber 44 from this converter 42.
is led out, and its end portion faces the light receiving element 24 in the light receiving device 22.
従って、発光素子１８からの光は、スリット１６を介し
て断続的光信号となり、これは、受光素子４０で一旦電
気信号に変換された上で再び変換器４２で光信号に変え
られるものであるが、受光装置２２に対しては光ファイ
バー４４によってその信号が伝送されるために特にノイ
ズの影響の回避という点で顕著な効果を奏する。Therefore, the light from the light emitting element 18 becomes an intermittent optical signal via the slit 16, which is once converted into an electrical signal by the light receiving element 40 and then converted into an optical signal by the converter 42 again. However, since the signal is transmitted to the light receiving device 22 through the optical fiber 44, it is particularly effective in avoiding the influence of noise.
本発明によれば、以上のように簡単な構成でロークリエ
ンコーダの小型化が達成され、しかも信号伝送途上での
ノイズの影響が除去されるばかりか製造工数も削減でき
る等積々の効果を奏する。According to the present invention, the compactness of the low-resolution encoder can be achieved with the simple configuration as described above, and furthermore, the influence of noise during signal transmission can be eliminated, and the number of manufacturing steps can also be reduced. play.
以上、本発明について好適な実施例を挙げて説明したが
、本発明は、この実施例に限定されるものではなく、本
発明の精神を逸脱しない範囲において種々の改良並びに
設計変更が可能であることは勿論である。Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and design changes can be made without departing from the spirit of the present invention. Of course.
図は、本発明に係るものであって、第１図は、ロータリ
エンコーダ内に受光用光ファイバーを配設した説明図、
第２図は、ロータリエンコーダ内に発光用光ファイバー
と受光用光ファイバーとを配設した説明図、第３図は、
ロータリエンコーダ内に受晃素子と電気信号／光信号変
換器を配設し、この変換器から光ファイバーを導出して
受光装置に接続した状態の説明図である。
１０・・ロークリエンコーダ
１２・・回転駆動軸 １４・・回転円板１６・・スリッ
ト １８・・発光素子
２０・・光ファイバー ２２・・受光装置２４・・受光
素子
３０・・光ファイバー ４０・・受光素子４２・・電気
信号／光信号変換器
４４・・光ファイバーThe figures relate to the present invention, and FIG. 1 is an explanatory diagram showing a light-receiving optical fiber arranged in a rotary encoder;
FIG. 2 is an explanatory diagram showing the arrangement of a light emitting optical fiber and a light receiving optical fiber in a rotary encoder, and FIG.
FIG. 2 is an explanatory diagram showing a state in which a sound receiving element and an electrical signal/optical signal converter are arranged in a rotary encoder, and an optical fiber is led out from the converter and connected to a light receiving device. 10..Rotary encoder 12..Rotation drive shaft 14..Rotating disk 16..Slit 18..Light emitting element 20..Optical fiber 22..Light receiving device 24..Light receiving element 30..Optical fiber 40..Light receiving element 42... Electric signal/optical signal converter 44... Optical fiber
Claims (4)
された回転円板の一側面に前記スリットに対応して発光
体を配設すると共に回転円板の他側面に前記発光体に対
峙する受光体を配設し、さらに前記受光体を受光素子を
含む受光装置に接続することを特徴とするロータリエン
コーダ。(1) A light emitting body is disposed on one side of a rotating disk that is rotated by a drive shaft and has a plurality of slits, corresponding to the slits, and a light emitting body is provided on the other side of the rotating disk, facing the light emitting body. A rotary encoder characterized in that a photoreceptor is provided, and the photoreceptor is further connected to a light-receiving device including a light-receiving element.
光体は、光フアイバーケーブルからなるロータリエンコ
ーダ。(2) In the device according to claim 1, the photoreceptor is a rotary encoder made of an optical fiber cable.
体は、発光素子に接続する光ファイバーからなるロータ
リエンコーダ。(3) In the device according to claim 1, the light emitter is a rotary encoder comprising an optical fiber connected to a light emitting element.
光体は、受光素子からなりこの受光素子に電気信号／光
信号変換器を接続すると共に前記電気信号／光信号変換
器の出力側から光ファイバーを導出してこれを受光装置
に接続してなるロータリエンコーダ。(4) In the device according to claim 1, the photoreceptor is composed of a photodetector, to which an electrical signal/optical signal converter is connected, and from the output side of the electrical signal/optical signal converter. A rotary encoder that derives an optical fiber and connects it to a light receiving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16363783A JPS6055225A (en) | 1983-09-06 | 1983-09-06 | Rotary encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16363783A JPS6055225A (en) | 1983-09-06 | 1983-09-06 | Rotary encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6055225A true JPS6055225A (en) | 1985-03-30 |
Family
ID=15777717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16363783A Pending JPS6055225A (en) | 1983-09-06 | 1983-09-06 | Rotary encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6055225A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5722511A (en) * | 1980-07-17 | 1982-02-05 | Fanuc Ltd | Pulse encoder |
-
1983
- 1983-09-06 JP JP16363783A patent/JPS6055225A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5722511A (en) * | 1980-07-17 | 1982-02-05 | Fanuc Ltd | Pulse encoder |
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