JPS55164364A - Multiphase optical tachometer - Google Patents
Multiphase optical tachometerInfo
- Publication number
- JPS55164364A JPS55164364A JP7234979A JP7234979A JPS55164364A JP S55164364 A JPS55164364 A JP S55164364A JP 7234979 A JP7234979 A JP 7234979A JP 7234979 A JP7234979 A JP 7234979A JP S55164364 A JPS55164364 A JP S55164364A
- Authority
- JP
- Japan
- Prior art keywords
- photodetectors
- shaft
- rotation
- emitting element
- light emitting
- 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
- Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
- Optical Transform (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
PURPOSE: To make it possible to discriminate easily the rotation speed and the rotation direction, by substituting the shaft of a rotary material for the slit of the rotary material and by making one light emitting element and plural photodetectors opposite to each other through the rotation axis.
CONSTITUTION: The tip of shaft 11 is cut off at 45° for the center, and the cut surface is made into mirror face A. When one light emitting element 12 and, for example, two photodetectors 13 and 14 are arranged horizontally, a light is irradiated to photodetectors 13 and 14 intermittently by rotation of shaft 11. The rotation speed as well as the rotation direction can be detected by the phase difference between output waveforms of photodetectors 13 and 14. In case that it is difficult to process shaft 11, a piece having the mirror face at 45° for the center may be fitted to the tip of shaft 11. Consequently, a tachometer which can discriminate the rotation speed and the rotation direction can be obtained easily by arranging one light emitting element and photodetectors corresponding to the number of phases.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7234979A JPS55164364A (en) | 1979-06-11 | 1979-06-11 | Multiphase optical tachometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7234979A JPS55164364A (en) | 1979-06-11 | 1979-06-11 | Multiphase optical tachometer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55164364A true JPS55164364A (en) | 1980-12-22 |
Family
ID=13486733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7234979A Pending JPS55164364A (en) | 1979-06-11 | 1979-06-11 | Multiphase optical tachometer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55164364A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6834174B2 (en) * | 2001-02-26 | 2004-12-21 | Canon Kabushiki Kaisha | Image forming apparatus and rotary body detection device |
JP2009017745A (en) * | 2007-07-09 | 2009-01-22 | Sanyo Electric Co Ltd | Geared motor having optical sensor |
-
1979
- 1979-06-11 JP JP7234979A patent/JPS55164364A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6834174B2 (en) * | 2001-02-26 | 2004-12-21 | Canon Kabushiki Kaisha | Image forming apparatus and rotary body detection device |
JP2009017745A (en) * | 2007-07-09 | 2009-01-22 | Sanyo Electric Co Ltd | Geared motor having optical sensor |
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