JPS6450913A - Correcting system of signal output of optical encoder - Google Patents

Correcting system of signal output of optical encoder

Info

Publication number
JPS6450913A
JPS6450913A JP62207876A JP20787687A JPS6450913A JP S6450913 A JPS6450913 A JP S6450913A JP 62207876 A JP62207876 A JP 62207876A JP 20787687 A JP20787687 A JP 20787687A JP S6450913 A JPS6450913 A JP S6450913A
Authority
JP
Japan
Prior art keywords
phases
phase
signals
signal
light
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
Application number
JP62207876A
Other languages
Japanese (ja)
Inventor
Kazunori Aoki
Tsutomu Hojo
Kiyoshi Wakayama
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.)
Delphi Co Ltd
Original Assignee
Delphi Co Ltd
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 Delphi Co Ltd filed Critical Delphi Co Ltd
Priority to JP62207876A priority Critical patent/JPS6450913A/en
Publication of JPS6450913A publication Critical patent/JPS6450913A/en
Pending legal-status Critical Current

Links

Landscapes

  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Optical Transform (AREA)

Abstract

PURPOSE:To obtain a signal having a certain amplitude invariably and being free from central drift even when an output signal is varied, by using signals obtained by applying arithmetic processings using specific formulas to signals of phase A taken out of an encoder and phases A' and B which are inverted thereto in phase by 180 deg. and different in phase by 90 deg. therefrom. CONSTITUTION:A light from a light-emitting element 6 is inputted to forwarding fibers 4 of phases A, A' and B and reaches a reflection-type encoder sensor unit 1 through an optical fiber cable 2. The light reflected with the rotation of a rotary slit plate of the unit is transmitted through backing fibers and converted into output voltages VA, VA' and VB by photodetecting circuits 9a, 9a' and 9b provided with photodetectors 7a, 7a' and 7b corresponding to the phases A, A' and B respectively. By using for these voltages the signals computed by an arithmetic processing circuit 10 so that the formula I using mark theta as a rotational angle of the rotary plate be established, a signal having a fixed peak value and being free from central drift can be obtained.
JP62207876A 1987-08-21 1987-08-21 Correcting system of signal output of optical encoder Pending JPS6450913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62207876A JPS6450913A (en) 1987-08-21 1987-08-21 Correcting system of signal output of optical encoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62207876A JPS6450913A (en) 1987-08-21 1987-08-21 Correcting system of signal output of optical encoder

Publications (1)

Publication Number Publication Date
JPS6450913A true JPS6450913A (en) 1989-02-27

Family

ID=16547018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62207876A Pending JPS6450913A (en) 1987-08-21 1987-08-21 Correcting system of signal output of optical encoder

Country Status (1)

Country Link
JP (1) JPS6450913A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205216A (en) * 1984-03-30 1985-10-16 Hitachi Ltd Position detection apparatus using moire fringes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205216A (en) * 1984-03-30 1985-10-16 Hitachi Ltd Position detection apparatus using moire fringes

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