Movatterモバイル変換


[0]ホーム

URL:


JPH0242316A - Rotary encoder - Google Patents

Rotary encoder

Info

Publication number
JPH0242316A
JPH0242316AJP19388388AJP19388388AJPH0242316AJP H0242316 AJPH0242316 AJP H0242316AJP 19388388 AJP19388388 AJP 19388388AJP 19388388 AJP19388388 AJP 19388388AJP H0242316 AJPH0242316 AJP H0242316A
Authority
JP
Japan
Prior art keywords
light
angle
light beam
mirror
resolution
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
Application number
JP19388388A
Other languages
Japanese (ja)
Inventor
Hideo Tachiki
立木 英雄
Toru Inoue
徹 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
NEC Engineering Ltd
Original Assignee
NEC Corp
NEC Engineering Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, NEC Engineering LtdfiledCriticalNEC Corp
Priority to JP19388388ApriorityCriticalpatent/JPH0242316A/en
Publication of JPH0242316ApublicationCriticalpatent/JPH0242316A/en
Pendinglegal-statusCriticalCurrent

Links

Landscapes

Abstract

PURPOSE:To easily vary the resolution by providing a mirror, a light receiving device, and a rod and adjusting the angle of incidence of a light beam on the mirror surface. CONSTITUTION:The knob 7 at a light emission part is rotated to vary the angle of incidence of the light beam on the mirror 4 from a light emitting device 2. Then the incident light beam is reflected repeatedly between the mirrors 4 and 5 and received by the light receiving device 3. This light receiving device 3 is fixed to a rotating shaft 1 by a rod 6, so the light beam is intermitted during rotation in proportion to the angle of rotation of the shaft 1. Further, the number of times of the intermittence of the light beam is counted to code the angle of rotation. At this time, the angle of mirror incidence is only increased by rotating the rotary knob 7 so as to increase the resolution. Thus, the resolution is easily varied.

Description

Translated fromJapanese

【発明の詳細な説明】〔産業上の利用分野〕本発明はロークリエンコーダ、特に発光器と受光器とを
用いた光学的手段によるロータリエンコーダに関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotary encoder, and particularly to a rotary encoder using optical means using a light emitter and a light receiver.

〔従来の技術〕[Conventional technology]

従来のロータリエンコーダは、外周にそって等間隔に配
置した光マスクを有する透明円板と、前記透明円板の中
心に固定したシャフトと、前記シャフトと並行に前記光
マスクをはさんで対向させた発光器と受光器とを含んで
構成される。
A conventional rotary encoder consists of a transparent disk having optical masks arranged at regular intervals along its outer periphery, a shaft fixed at the center of the transparent disk, and the optical masks facing each other in parallel with the shaft. The device includes a light emitter and a light receiver.

次に従来のロータリエンコーダについて図面を参照して
詳細に説明する。
Next, a conventional rotary encoder will be described in detail with reference to the drawings.

第3図は従来のロークリエンコーダの一例を示す斜視図
である。
FIG. 3 is a perspective view showing an example of a conventional low-resolution encoder.

第3図に示すロータリエンコーダは外周にそって等間隔
に配置した光マスク9を有する透明円板8と、透明円板
8の中心に固定したシャフト1と、シャフト1と並行に
光マスク9をはさんで対向させた発光器2と受光器3と
を含んでいる。
The rotary encoder shown in FIG. 3 includes a transparent disk 8 having optical masks 9 arranged at equal intervals along the outer circumference, a shaft 1 fixed at the center of the transparent disk 8, and an optical mask 9 arranged parallel to the shaft 1. It includes a light emitter 2 and a light receiver 3 which are placed opposite to each other.

第4図は、第3図に示す従来の一例の動作を説明する側
面図である。
FIG. 4 is a side view illustrating the operation of the conventional example shown in FIG.

透明円板8上に光マスク9がない場合には、発光器2か
ら発行された光は矢印で示す如く円板8を通過して受光
器3に受光される。
If there is no optical mask 9 on the transparent disk 8, the light emitted from the light emitter 2 passes through the disk 8 as indicated by the arrow and is received by the light receiver 3.

次に円板8が回転して、発光器2の下に光マスり9がく
ると、発光器2の光は受光器3に受光されない。透明円
板8の回転角に比例して光の点滅が受光器3により検知
されるので点滅数を数えることにより回転角のコード化
が可能となる。
Next, when the disk 8 rotates and the light mass 9 comes under the light emitter 2, the light from the emitter 2 is not received by the light receiver 3. Since the blinking of light is detected by the light receiver 3 in proportion to the rotation angle of the transparent disk 8, the rotation angle can be coded by counting the number of blinks.

回転検出の分解能は、光マスク9のピッチdで決定され
る。
The resolution of rotation detection is determined by the pitch d of the optical mask 9.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来のロータリエンコーダは、光マスクのピッ
チが印刷の為固定となっているので、分解能を任意に変
更することが出来ないという欠点があった。
The above-mentioned conventional rotary encoder has a drawback in that the pitch of the optical mask is fixed for printing, and therefore the resolution cannot be changed arbitrarily.

〔課題を解決するための手段〕[Means to solve the problem]

本発明のロータリエンコーダは、同軸で対向する2個の
円筒状の鏡と、前記一方の鏡の鏡面と対向配置した受光
器と、前記受光器を一方の端に固定したロッドと、前記
ロッドの他方の端を固定するとともに2枚の鏡の軸上に
配置したシャフトと、前記一方の鏡面に対して任意角度
で光ビームを発光する発光部を含んで構成される。
The rotary encoder of the present invention includes two cylindrical mirrors coaxially facing each other, a light receiver disposed to face the mirror surface of the one mirror, a rod having the light receiver fixed to one end thereof, and a rod having the light receiver fixed to one end thereof. It is configured to include a shaft whose other end is fixed and which is arranged on the axis of the two mirrors, and a light emitting section that emits a light beam at an arbitrary angle with respect to the one mirror surface.

〔実施例〕次に、本発明の実施例について、図面を参照して詳細に
説明する。
[Example] Next, an example of the present invention will be described in detail with reference to the drawings.

第1図は本発明の一実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.

第1図に示すロータリエンコーダは、同軸で対向する2
個の円筒状の鏡4,5と、鏡4の鏡面と対向配置した受
光器3と、受光器3を一方の端に固定したロッド6と、
他方の端を固定するとともに2枚の鏡4.5の軸上に配
置したシャフト1と、一方の鏡面5に対して任意角度で
光ビームを発光する発光部とを含んで構成される。光ビ
ームの発光部は、一方の鏡面4の一ケ所にあけた穴にと
りつけられた発光器2とこの発光器2を任意角度に回転
させる回転つまみ7とを含んで構成される。
The rotary encoder shown in Figure 1 consists of two coaxially opposing rotary encoders.
cylindrical mirrors 4 and 5, a light receiver 3 disposed to face the mirror surface of the mirror 4, and a rod 6 with the light receiver 3 fixed to one end;
The shaft 1 has its other end fixed and is arranged on the axis of two mirrors 4.5, and a light emitting section that emits a light beam at an arbitrary angle with respect to one mirror surface 5. The light beam emitting section includes a light emitter 2 attached to a hole drilled at one place on one mirror surface 4 and a rotation knob 7 for rotating the light emitter 2 to an arbitrary angle.

次に第2図を用いて、第1図に示すロータリエンコーダ
の動作を説明する。
Next, the operation of the rotary encoder shown in FIG. 1 will be explained using FIG. 2.

発光部にある回転つまみ7を回転することにより発光器
2から鏡4に入射する光ビームの角度が変化する。入射
した光ビームは2つの鏡4と5の間を多重反射し、受光
器3に受光される。受光器3は、回転するシャフト1に
ロッド6で固定されているので、シャフト1の回転角度
に比例して、回転中に光ビームの断続が起きる。
By rotating the rotary knob 7 on the light emitting section, the angle of the light beam incident on the mirror 4 from the light emitter 2 changes. The incident light beam undergoes multiple reflections between the two mirrors 4 and 5 and is received by the light receiver 3. Since the light receiver 3 is fixed to the rotating shaft 1 with a rod 6, the light beam is interrupted during rotation in proportion to the rotation angle of the shaft 1.

この光ビームの断続回数をカウントすることにより回転
角度をコード化することが可能である。
By counting the number of times this light beam is interrupted, it is possible to code the rotation angle.

分解能を上げるには回転つまみ7を回転させて鏡面入射
角を大きくすればよい。
In order to increase the resolution, the rotation knob 7 can be rotated to increase the specular incidence angle.

〔発明の効果〕〔Effect of the invention〕

本発明のロータリエンコーダは、鏡面に対する光ビーム
の入射角を調整可能とすることにより分解能を容易に可
変とすることが出来るという効果がある。
The rotary encoder of the present invention has the advantage that the resolution can be easily varied by making it possible to adjust the angle of incidence of the light beam with respect to the mirror surface.

5・・・鏡、6・・・ロッド、7・・・回転つまみ、8
・・・透明円板、9・・・光マスク。
5...Mirror, 6...Rod, 7...Rotary knob, 8
...Transparent disk, 9...Light mask.

Claims (1)

Translated fromJapanese
【特許請求の範囲】[Claims]同軸で対向する2個の円筒状の鏡と、前記一方の鏡の鏡
面と対向配置した受光器と、前記受光器を一方の端に固
定したロッドと、前記ロッドの他方の端を固定するとと
もに2枚の鏡の軸上に配置したシャフトと、前記一方の
鏡面に対して任意角度で光ビームを発光する発光部を含
むことを特徴とするロータリエンコーダ。
two cylindrical mirrors coaxially facing each other, a light receiver disposed opposite to the mirror surface of the one mirror, a rod having the light receiver fixed to one end, and the other end of the rod being fixed; A rotary encoder comprising: a shaft disposed on the axis of two mirrors; and a light emitting section that emits a light beam at an arbitrary angle with respect to the one mirror surface.
JP19388388A1988-08-021988-08-02Rotary encoderPendingJPH0242316A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP19388388AJPH0242316A (en)1988-08-021988-08-02Rotary encoder

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP19388388AJPH0242316A (en)1988-08-021988-08-02Rotary encoder

Publications (1)

Publication NumberPublication Date
JPH0242316Atrue JPH0242316A (en)1990-02-13

Family

ID=16315320

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP19388388APendingJPH0242316A (en)1988-08-021988-08-02Rotary encoder

Country Status (1)

CountryLink
JP (1)JPH0242316A (en)

Similar Documents

PublicationPublication DateTitle
US4533830A (en)Optical encoder with a shutter clutched for directional movement
JP4780825B2 (en) Rotation angle sensor for rotating members
JP3203643B2 (en) Reflective encoder
JPH05203465A (en)Rotary encoder
GB2283811A (en)Encoder
KR900004781B1 (en)Light-reflector type encoding method and the encoder
US3226557A (en)Photosensitive scanner for detecting radiation from any azimuthal angle
JP4890190B2 (en) Encoder
JP3509830B2 (en) Optical rotary encoder
JPH0242316A (en)Rotary encoder
US5508088A (en)Timing device and method of manufacture therefor
JPS59226822A (en)Rotary encoder
US3714448A (en)Light weight, low torque, inexpensive drum type optical digital shaft angle encoder
US4555625A (en)Precision drum encoder
US5672865A (en)Timing device for controlling machinery and other servomechanical devices and method of manufacture therefor
US4123148A (en)Reflective laser line generator
JPH08166257A (en)Rotary encoder and rotary disk used in this rotary encoder
JPH0747693Y2 (en) Rotary encoder
JP3095759B2 (en) Optical movement detector
JP4624720B2 (en) counter
JPS6381212A (en) rotary encoder
JPH06185957A (en)Rotational angle measuring instrument
AU1842799A (en)Reading-out equipment for a number barrel mechanism
JPS60259909A (en) optical potentiometer
JP2540113B2 (en) Encoder

[8]ページ先頭

©2009-2025 Movatter.jp