JPH0327314U - - Google Patents
Info
- Publication number
- JPH0327314U JPH0327314U JP8757189U JP8757189U JPH0327314U JP H0327314 U JPH0327314 U JP H0327314U JP 8757189 U JP8757189 U JP 8757189U JP 8757189 U JP8757189 U JP 8757189U JP H0327314 U JPH0327314 U JP H0327314U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- magnitude
- encoder
- output
- 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
Landscapes
- Optical Transform (AREA)
Description
第１図はこの考案の一実施例を示す回路図、第
２図は読取り装置の原理構成図、第３図は従来の
エンコーダ装置を示す回路図、第４図及び第５図
はそれの各部信号波形を示すタイムチヤートであ
る。
図において、４……エンコーダドラム、５……
ホトカプラ、８……ホトダイオード、９……ホト
トランジスタ、１３……波形整形回路、１５……
逓倍回路、１６……デユーテイ比検出回路、２１
……光電流制御回路である。図中同一符号は同一
あるいは相当部分を示す。
Fig. 1 is a circuit diagram showing an embodiment of this invention, Fig. 2 is a diagram showing the basic configuration of a reading device, Fig. 3 is a circuit diagram showing a conventional encoder device, and Figs. 4 and 5 are its respective parts. This is a time chart showing signal waveforms. In the figure, 4...encoder drum, 5...
Photocoupler, 8... Photodiode, 9... Phototransistor, 13... Waveform shaping circuit, 15...
Multiplier circuit, 16...Duty ratio detection circuit, 21
...This is a photocurrent control circuit. The same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
ム、このエンコーダドラムのスリツト位置の両側
にホトダイオードとホトトランジスタが配置され
、上記ホトダイオードから上記エンコーダドラム
のスリツトを透過した光に応じた信号電圧が上記
ホトトランジスタから取出されるホトカプラ、上
記エンコーダドラムの回転に伴うこのホトカプラ
の出力信号電圧と所定の直流電圧とを比較し、こ
の直流電圧との大小に応じた２値レベルの矩形波
電圧を出力する波形整形回路、及びこの波形整形
回路の出力矩形波電圧のエツジ部においてパルス
信号を出力する逓倍回路を備えたエンコーダ装置
において、上記波形整形回路の出力矩形波電圧の
デユーテイ比に応じた大きさの直流電圧を取出す
デユーテイ比検出回路と、このデユーテイ比検出
回路の出力電圧値と所定直流電圧値との差の大き
さに逆比例して上記ホトカプラのホトダイオード
電流の大きさを制御する光電流制御回路とを設け
たことを特徴とするエンコーダ装置。 An encoder drum has a large number of slits on its circumference, a photodiode and a phototransistor are arranged on both sides of the slit position of this encoder drum, and a signal voltage corresponding to the light transmitted from the photodiode through the slit of the encoder drum is applied to the phototransistor. Waveform shaping that compares the output signal voltage of this photocoupler with a predetermined DC voltage as the encoder drum rotates, and outputs a binary level rectangular wave voltage depending on the magnitude of the DC voltage. In an encoder device comprising a circuit and a multiplier circuit that outputs a pulse signal at the edge portion of the output rectangular wave voltage of the waveform shaping circuit, the DC voltage has a magnitude corresponding to the duty ratio of the output rectangular wave voltage of the waveform shaping circuit. and a photocurrent control circuit that controls the magnitude of the photodiode current of the photocoupler in inverse proportion to the magnitude of the difference between the output voltage value of the duty ratio detection circuit and a predetermined DC voltage value. An encoder device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8757189U JPH0327314U (en) | 1989-07-26 | 1989-07-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8757189U JPH0327314U (en) | 1989-07-26 | 1989-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0327314U true JPH0327314U (en) | 1991-03-19 |
Family
ID=31637213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8757189U Pending JPH0327314U (en) | 1989-07-26 | 1989-07-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0327314U (en) |
-
1989
- 1989-07-26 JP JP8757189U patent/JPH0327314U/ja active Pending
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