JPH0290020A - Optical encoder - Google Patents
Optical encoderInfo
- Publication number
- JPH0290020A JPH0290020A JP24108288A JP24108288A JPH0290020A JP H0290020 A JPH0290020 A JP H0290020A JP 24108288 A JP24108288 A JP 24108288A JP 24108288 A JP24108288 A JP 24108288A JP H0290020 A JPH0290020 A JP H0290020A
- Authority
- JP
- Japan
- Prior art keywords
- light
- slit
- optical fiber
- slits
- disk
- 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
- 230000003287 optical effect Effects 0.000 title claims description 6
- 239000013307 optical fiber Substances 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract 2
- 238000006073 displacement reaction Methods 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Optical Transform (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は回転体の角ｊψや速度を光学的に検出する光学
式エンコーダに係り、％Ｉこ光ファイバそ用いたも０）
に好適な光学式エンコーダに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an optical encoder that optically detects the angle jψ and speed of a rotating body.
The present invention relates to an optical encoder suitable for.
エンコーダは、回転体の角度と速度８＋ｙＬ出するもの
であり、基準点用のｔｔ Ｅ Ｆ ４ｇ号や、基準点乃
）らの角度８ｔｉＩ２出するＰ ＯＳ信号等の相数の↑
＃報を出力し、ＰＭ業用ロボッ）、ＮＣ工作機械などの
Ｆ’Ａ分野で幅広くオリ用されている。また埃在では、
駆動６１５分から光中する゛ノイズによる誤動作を防ぐ
ために、センサ部Ｉこ尤ファイバを用いた光学式エンコ
ーダがめる。なおこの１４０】エンコータ１コバ、例え
ば特開昭６０−１９２２１５号が挙げられる。The encoder outputs the angle and speed of the rotating body 8+yL, and the phase number ↑ of the tt E F 4g for the reference point and the POS signal that outputs the angle 8tiI2 from the reference point.
It outputs # information and is widely used in the F'A field such as PM industry robots and NC machine tools. Also, in Kozai,
In order to prevent malfunctions due to noise in the light from the drive 615, an optical encoder using an optical fiber is installed in the sensor section I. An example of the encoder 140 is disclosed in Japanese Patent Application Laid-open No. 192215/1983.
上記従来技術（ま、発光ｔ１→にコリメータレンズ。 The above conventional technology (well, collimator lens for light emission t1→).
受光９１１７１こは集光レンズと固定スケールが必要で
あり、構成部品が多く経断的ではなかった。Light receiving 91171 requires a condensing lens and a fixed scale, has many components, and is not longitudinal.
本発明の目的は、レンズ系等の付属部品をなくすこと１
こより（Ｎ造を１頂単ｆこし、低価格でイ百頭性の硝い
光学式エンコーダを提供すること（こある。The purpose of the present invention is to eliminate accessory parts such as a lens system.
To provide a low-cost, high-performance optical encoder by converting the N-frame structure into a single-top single-F structure.
〔課ｊ用を解決するためυＪ手手段
上上記目的、慣用用円板に基準点のＲＥ Ｆ用スリット
と、基準点からの角度８表すＰＯ８用スリットを同一円
周上に設け、ＲＥＦ用スリスリット口面積をＰＯ８用ス
リットの開口面積の約２倍ｄし、発光用の光フアイバ８
１本、受光用の光ファイバをＲＥ ）用とＰＯ８用の２
水上し、光ファイバの開口角を利用して発光用の［７ア
イパから出た元を２本の受光用光ファイバで受けること
により達成さｎる〇
〔作用〕
発光用光ファイバから出た光は光ファイバの開口角で広
がり円板のスリットｔこ照射される。円板のスリットを
透通してきた光を２本の受光用光ファイバで受光するこ
とＩこより、レンズ系を使用しないで工／コーダを構成
することかできる。[In order to solve the υJ method for the above purpose, a slit for REF at the reference point and a slit for PO8 representing the angle 8 from the reference point are provided on the same circumference on the conventional disc, and the slit for REF is The slit opening area is approximately twice the opening area of the PO8 slit, and the optical fiber 8 for light emission is
1 optical fiber for light reception, 2 for RE ) and PO8
Achieved by floating on water and receiving the light emitted from the light emitting optical fiber using the aperture angle of the optical fiber with two light receiving optical fibers. Light emitted from the light emitting optical fiber. The beam spreads at the aperture angle of the optical fiber and is irradiated through the slit of the disk. By receiving the light that has passed through the slit of the disc using two light-receiving optical fibers, it is possible to construct a coder/coder without using a lens system.
以下、本発明の一実施例を第１図から第４図１こより説
明する。Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 4.
第１図は本発明の構成図である。光源１から出た光は元
ファイバ２で伝送され他端から回転円板３のスリット６
ａ、６ｂｉこ照射される。光ファイバ２から出た光はス
リン）６ｇ、６ｂにより断続した光となり光ファイバ４
ａ、４ｂによって受光装ｒｖｉ５ａ、５ｂに伝送され電
気信号に変換される。FIG. 1 is a block diagram of the present invention. The light emitted from the light source 1 is transmitted through the original fiber 2 and from the other end to the slit 6 of the rotating disk 3.
a, 6 bis is irradiated. The light emitted from the optical fiber 2 becomes intermittent light due to Surin) 6g and 6b, and is connected to the optical fiber 4.
a, 4b to the light receiving devices rvi5a, 5b, where it is converted into an electrical signal.
第２図（ａ）はＲＥＦ用スリット部を示す。元ファイバ
２から出た光は開口角２θで広がりＲＥＦ’用スリツ）
６ａを透過して受光用のＲＥＦ用元ファイバ４ａとＰＯ
８用元フ光ファイバの両方で受光される。第２図（ｂ）
はＰＯ３用スリット部を示したもので、元ファイバ２か
ら開口角２θで広がった光はＰＯ８用スリット６ｂを透
過し、ＰＯ８用元フ光ファイバのみ受光することができ
る。FIG. 2(a) shows the REF slit section. The light emitted from the original fiber 2 spreads at an aperture angle of 2θ (slit for REF')
REF original fiber 4a for light reception after passing through 6a and PO
The light is received by both of the original optical fibers. Figure 2(b)
1 shows a slit portion for PO3, and the light spread from the original fiber 2 at an aperture angle of 2θ is transmitted through the slit 6b for PO8, and can be received only by the original optical fiber for PO8.
第５図は回転円板の平面図を示す。FIG. 5 shows a plan view of the rotating disk.
次に出力さｎた信号８第４図１こより説明する。Next, the output signal 8 will be explained with reference to FIG. 4.
基準点であるＲＥＦ倍号１０からのＰＯ８偏号１】のパ
ルス数により回転角度を、ＰＯ８ｇＫ号１１のパルス幅
により回転速度を、またＲＥＦ信号１０が２ケ連続する
こ♂により原点座標８検出することができる。The rotation angle is determined by the number of pulses of PO8 polarization 1] from the reference point REF multiplication number 10, the rotation speed is determined by the pulse width of PO8gK number 11, and the origin coordinate 8 is detected by two consecutive REF signals 10. can do.
＃ｃ５図は回転円板２０を透明部材で惧成し、光透過部
２１以外に光連町部２２を設けた回転円板の平面図を示
す。−ｙｔ、ｓ断部２２ば、例ば黒色塗料のような光吸
収材料あるいは、腕曲のごとき光反射材料の印刷や、は
り合せで形成される。FIG. #c5 is a plan view of a rotating disk in which the rotating disk 20 is made of a transparent member and has a light connecting portion 22 in addition to the light transmitting portion 21. The -yt and s sections 22 are formed by printing or gluing a light-absorbing material such as black paint or a light-reflecting material such as a curved arm.
本発明によｎば、元ファイバの開口角のみを利用しレン
ズ系を使用しないので、低価格で提供できる。According to the present invention, only the aperture angle of the original fiber is used and no lens system is used, so it can be provided at a low price.
第１図は本発明の一実施例の＃４構成、第２図はスリッ
トの〜丁面図で元ファイバとスリットの関係を示す説明
図、第５図は回転円板の平面図、第４図は出力イｇ号の
タイムチャート、第５図は回転円板を透明部材で構成し
たものの平面図である。
１・・・光源 ２・・・光ファイバ ５・・・回転円板
４ａ、４ｂ・・・光ファイバ ５ａ、５ｂ・・・受光装
置 ６ａ、６ｂ・・・スリット１０・・・ＲＥＦ信号１
１・・・ＰＯ８信号 ２０・・・回転円板 ２１・・・
光透過部２２・・・元通断部
代理人 弁理士 小 川 勝 男メー
元 源
２ 九 フフイハ
５ 回Ｉ云円ノ及
楚１図
弯
肩２図
（α）
４α ＲＥＦ用尤フフイハ
４ｂ、ＰＯ５用尤７γ４ハ
ｋ ＲＥＦＰｉｅ尤肢１
（ｂ）
５ｂ、 ＰＯ３用ダ克殻１
εユ Ｆ、ＥＦ用入り、Ｆ
Ｇｂ、ＰＯ５屑スリンｈFIG. 1 is a #4 configuration of an embodiment of the present invention, FIG. 2 is a cross-sectional view of the slit and is an explanatory diagram showing the relationship between the original fiber and the slit, FIG. 5 is a plan view of the rotating disk, and FIG. The figure is a time chart of output Ig, and FIG. 5 is a plan view of a rotary disk constructed of a transparent member. 1... Light source 2... Optical fiber 5... Rotating disk 4a, 4b... Optical fiber 5a, 5b... Light receiving device 6a, 6b... Slit 10... REF signal 1
1...PO8 signal 20...Rotating disk 21...
Light transmission section 22...Former agent of the communication section Patent attorney Masaru Ogawa Masaru Ogawa Gen 2 9 Fufuiha 5 times I Yuen no and Chu 1 Figure 2 (α) 4α For REF use Fufuiha 4b, PO5 Usage 7γ4 Hk REFPie addition 1 (b) 5b, PO3 use case 1 εyu F, EF use, F Gb, PO5 scrap sulinh
Claims (1)
るために複数のスリットを設けた円板と、前記円板のス
リットに光を照射するための光源と、前記光源から出た
光を前記円板のスリットに対して垂直に透過させるため
に設けた発光用光ファイバと、前記円板のスリットを透
過してきた光を受ける受光用光ファイバと、前記受光用
光ファイバから出た光を検出する受光装置から成る光学
式エンコーダにおいて、光透過部分のスリット面積が異
なる２種類の検出用スリットを同一円周上に設けたこと
を特徴とする光学式エンコーダ。1. A rotating shaft, a disc provided with a plurality of slits to detect the displacement amount and rotational speed of the shaft, a light source for irradiating the slits of the disc with light, and a light source emitted from the light source. A light-emitting optical fiber provided to transmit light perpendicularly to the slit in the disk, a light-receiving optical fiber for receiving the light transmitted through the slit in the disk, and a light-receiving optical fiber provided to transmit light perpendicularly to the slit in the disk; An optical encoder comprising a light receiving device for detecting light, characterized in that two types of detection slits having different slit areas in light transmitting portions are provided on the same circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24108288A JPH0290020A (en) | 1988-09-28 | 1988-09-28 | Optical encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24108288A JPH0290020A (en) | 1988-09-28 | 1988-09-28 | Optical encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0290020A true JPH0290020A (en) | 1990-03-29 |
Family
ID=17069024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24108288A Pending JPH0290020A (en) | 1988-09-28 | 1988-09-28 | Optical encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0290020A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5506404A (en) * | 1993-09-08 | 1996-04-09 | Milan-Kamski; W. J. | Retrofitting device providing automatic reading capability for metering systems |
-
1988
- 1988-09-28 JP JP24108288A patent/JPH0290020A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5506404A (en) * | 1993-09-08 | 1996-04-09 | Milan-Kamski; W. J. | Retrofitting device providing automatic reading capability for metering systems |
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