JPS5530603A - Position detector - Google Patents
Position detectorInfo
- Publication number
- JPS5530603A JPS5530603A JP10273078A JP10273078A JPS5530603A JP S5530603 A JPS5530603 A JP S5530603A JP 10273078 A JP10273078 A JP 10273078A JP 10273078 A JP10273078 A JP 10273078A JP S5530603 A JPS5530603 A JP S5530603A
- Authority
- JP
- Japan
- Prior art keywords
- scales
- resolution
- detected
- width
- pitch
- 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.)
- Granted
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Control Of Position Or Direction (AREA)
Abstract
PURPOSE: To improve the resolution in position detections by using the main and auxiliary scales having slightly different pitch intervals so that the coincident points between the two scales are electrically detected.
CONSTITUTION: There are provided both a main scale 1, which is formed with position marks having white and black stripes of width l alternately arranged at a pitch l, and an auxiliary scale 2 which is formed with white and black stripes of width l' at a pitch l'. If the coincident points between the two scales 1 and 2 are detected in accordance with the vernier principle, the reading can be performed with the resolution of l-l'. More specifically, if light receiving elements 5 and 6 scans the grid patterns, position signals corresponding to the patterns of the scales 1 and 2 are generated by a position signal generating circuit. If, now, an exclusive OR is taken between the two signals, such a pulse train can be obtained as has its pulse width minimized at the coincident point. As a result, by comparing the respective pulse widthes, the coincident points i can be detected. Thus, it is possible to enhance the resolution of the position detection.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10273078A JPS5530603A (en) | 1978-08-25 | 1978-08-25 | Position detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10273078A JPS5530603A (en) | 1978-08-25 | 1978-08-25 | Position detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5530603A true JPS5530603A (en) | 1980-03-04 |
JPS5752963B2 JPS5752963B2 (en) | 1982-11-10 |
Family
ID=14335360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10273078A Granted JPS5530603A (en) | 1978-08-25 | 1978-08-25 | Position detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5530603A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4441440A (en) * | 1982-12-14 | 1984-04-10 | The Singer Company | Push-button control module for a sewing machine |
US4442784A (en) * | 1982-12-14 | 1984-04-17 | The Singer Company | Vertically stacked components in a control module for a sewing machine |
JPS6057417A (en) * | 1983-09-08 | 1985-04-03 | Tohoku Metal Ind Ltd | Position control system |
EP2511670A3 (en) * | 2011-04-14 | 2014-08-20 | Canon Kabushiki Kaisha | Encoder |
EP2511666A3 (en) * | 2011-04-14 | 2014-08-20 | Canon Kabushiki Kaisha | Encoder |
EP2511669A3 (en) * | 2011-04-13 | 2014-08-20 | Canon Kabushiki Kaisha | Encoder |
EP2511668A3 (en) * | 2011-04-14 | 2014-08-20 | Canon Kabushiki Kaisha | Encoder |
-
1978
- 1978-08-25 JP JP10273078A patent/JPS5530603A/en active Granted
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4441440A (en) * | 1982-12-14 | 1984-04-10 | The Singer Company | Push-button control module for a sewing machine |
US4442784A (en) * | 1982-12-14 | 1984-04-17 | The Singer Company | Vertically stacked components in a control module for a sewing machine |
JPS6057417A (en) * | 1983-09-08 | 1985-04-03 | Tohoku Metal Ind Ltd | Position control system |
EP2511669A3 (en) * | 2011-04-13 | 2014-08-20 | Canon Kabushiki Kaisha | Encoder |
US9024251B2 (en) | 2011-04-13 | 2015-05-05 | Canon Kabushiki Kaisha | Encoder having a scale that includes block patterns |
EP2511670A3 (en) * | 2011-04-14 | 2014-08-20 | Canon Kabushiki Kaisha | Encoder |
EP2511666A3 (en) * | 2011-04-14 | 2014-08-20 | Canon Kabushiki Kaisha | Encoder |
EP2511668A3 (en) * | 2011-04-14 | 2014-08-20 | Canon Kabushiki Kaisha | Encoder |
US9121731B2 (en) | 2011-04-14 | 2015-09-01 | Canon Kabushiki Kaisha | Encoder having a scale with two areas in which an increasing direction of the amplitude of the energy distribution is opposite between the two areas for precisely obtaining a position of the scale |
US9127967B2 (en) | 2011-04-14 | 2015-09-08 | Canon Kabushiki Kaisha | Encoder having plural phase acquirers and a positional information acquirer for precisely obtaining a position of a scale |
US9354089B2 (en) | 2011-04-14 | 2016-05-31 | Canon Kabushiki Kaisha | Encoder |
Also Published As
Publication number | Publication date |
---|---|
JPS5752963B2 (en) | 1982-11-10 |
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