JPS55140105A - Photo encoder - Google Patents
Photo encoderInfo
- Publication number
- JPS55140105A JPS55140105A JP4751779A JP4751779A JPS55140105A JP S55140105 A JPS55140105 A JP S55140105A JP 4751779 A JP4751779 A JP 4751779A JP 4751779 A JP4751779 A JP 4751779A JP S55140105 A JPS55140105 A JP S55140105A
- Authority
- JP
- Japan
- Prior art keywords
- slit
- triangular waves
- output
- position detecting
- photo
- 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)
- Control Of Position Or Direction (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
PURPOSE: To obtain the interpolation between the minimum pitches of an incremental type encoder which is a digital type position detector without using an expensive analog-digital converter.
CONSTITUTION: Triangular waves are obtained when position detecting slits 2 are relatively moved for a photosensing part. By counting the number of the triangular waves, the number of openings of passed position detecting slits is obtained. When a wave reaches the position of the slit to be stayed, the difference between the discrete value and the sesired one, namely, position error volume, becomes zero. A region of one wave of the triangular waves exists in this section. When the position error volume becomes zero, the luminous intensity of a light emitting element 1 is changed by an oscillator OSC1 and photo-sensing output is obtained according to the area of the superposed part of a photo-sensing slit 3 and the position detecting slit 2 and the output is detected by an amplifier Amp 2 and converted into pulse width. The output pulse in an oscillator OSC2 is counted by a counter CNT through an AND gate AG which opened and closed by the pulse width.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4751779A JPS55140105A (en) | 1979-04-18 | 1979-04-18 | Photo encoder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4751779A JPS55140105A (en) | 1979-04-18 | 1979-04-18 | Photo encoder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55140105A true JPS55140105A (en) | 1980-11-01 |
Family
ID=12777294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4751779A Pending JPS55140105A (en) | 1979-04-18 | 1979-04-18 | Photo encoder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55140105A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57133303A (en) * | 1980-12-27 | 1982-08-18 | Heidenhain Gmbh Dr Johannes | Absolute length measuring or angle measuring apparatus |
JPS58118909A (en) * | 1982-01-06 | 1983-07-15 | Mitsutoyo Mfg Co Ltd | Photoelectric type encoder |
JPS59124872A (en) * | 1982-12-31 | 1984-07-19 | Fujitsu Ltd | Wire dot printer |
-
1979
- 1979-04-18 JP JP4751779A patent/JPS55140105A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57133303A (en) * | 1980-12-27 | 1982-08-18 | Heidenhain Gmbh Dr Johannes | Absolute length measuring or angle measuring apparatus |
JPH043487B2 (en) * | 1980-12-27 | 1992-01-23 | ||
JPS58118909A (en) * | 1982-01-06 | 1983-07-15 | Mitsutoyo Mfg Co Ltd | Photoelectric type encoder |
JPS59124872A (en) * | 1982-12-31 | 1984-07-19 | Fujitsu Ltd | Wire dot printer |
JPH0424235B2 (en) * | 1982-12-31 | 1992-04-24 | Fujitsu Ltd |
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