JPS6443717A - Rotary encoder - Google Patents

Rotary encoder

Info

Publication number
JPS6443717A
JPS6443717A JP19991287A JP19991287A JPS6443717A JP S6443717 A JPS6443717 A JP S6443717A JP 19991287 A JP19991287 A JP 19991287A JP 19991287 A JP19991287 A JP 19991287A JP S6443717 A JPS6443717 A JP S6443717A
Authority
JP
Japan
Prior art keywords
code
belt
converted
circuit
psd
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
JP19991287A
Other languages
Japanese (ja)
Other versions
JPH0769190B2 (en
Inventor
Yasumasa Sakai
Hiroshi Kitajima
Maki Yamashita
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP19991287A priority Critical patent/JPH0769190B2/en
Publication of JPS6443717A publication Critical patent/JPS6443717A/en
Publication of JPH0769190B2 publication Critical patent/JPH0769190B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Optical Transform (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To measure a correct angle position by providing a rotary disk with an eccentric correction belt concentric with a recording belt and detecting the position of the eccentric correction belt by a position error element PSD provided at a position of 90 deg. from a code detection head. CONSTITUTION:A charge distribution of the recording belt 2 which indicates a Gray code pattern is stored in a CCD 14 with projection light from a laser diode LD 11 and then converted into a binary signal through a driving circuit 32 and a waveform shaping circuit 34. This read result contains a code detection error due to the eccentricity of the recording belt 2. Light emitted continuously by an LED 21, on the other hand, is led in an arithmetic circuit 36 through the eccentric correction belt 4 and PSD 22 and an analog signal which indicating the distance between the arrival point of a light spot and electric point center of the PSD 22. This output is A/D-converted 37 and sent as a code position error to an arithmetic circuit 35. The output of the circuit 34 is therefore converted into a parallel position signal and the number of codes corresponding to the code position error signal is found and the result is operated with a specific expression to correct the code.
JP19991287A 1987-08-12 1987-08-12 Rotary Encoder Expired - Lifetime JPH0769190B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19991287A JPH0769190B2 (en) 1987-08-12 1987-08-12 Rotary Encoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19991287A JPH0769190B2 (en) 1987-08-12 1987-08-12 Rotary Encoder

Publications (2)

Publication Number Publication Date
JPS6443717A true JPS6443717A (en) 1989-02-16
JPH0769190B2 JPH0769190B2 (en) 1995-07-26

Family

ID=16415670

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19991287A Expired - Lifetime JPH0769190B2 (en) 1987-08-12 1987-08-12 Rotary Encoder

Country Status (1)

Country Link
JP (1) JPH0769190B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012093253A (en) * 2010-10-27 2012-05-17 Tokyo Seimitsu Co Ltd Angle measuring method and angle measuring system
US8497469B2 (en) 2010-06-15 2013-07-30 Canon Kabushiki Kaisha Rotary encoder that detects rotation angle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8497469B2 (en) 2010-06-15 2013-07-30 Canon Kabushiki Kaisha Rotary encoder that detects rotation angle
JP2012093253A (en) * 2010-10-27 2012-05-17 Tokyo Seimitsu Co Ltd Angle measuring method and angle measuring system

Also Published As

Publication number Publication date
JPH0769190B2 (en) 1995-07-26

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