JPS5530603A - Position detector - Google Patents

Position detector

Info

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
Application number
JP10273078A
Other languages
Japanese (ja)
Other versions
JPS5752963B2 (en
Inventor
Hiroshi Horikawa
Shigeki Ogawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP10273078A priority Critical patent/JPS5530603A/en
Publication of JPS5530603A publication Critical patent/JPS5530603A/en
Publication of JPS5752963B2 publication Critical patent/JPS5752963B2/ja
Granted legal-status Critical Current

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
JP10273078A 1978-08-25 1978-08-25 Position detector Granted JPS5530603A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (11)

* Cited by examiner, † Cited by third party
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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