JPS55101010A - Photoelectric type position detecting system - Google Patents

Photoelectric type position detecting system

Info

Publication number
JPS55101010A
JPS55101010A JP703979A JP703979A JPS55101010A JP S55101010 A JPS55101010 A JP S55101010A JP 703979 A JP703979 A JP 703979A JP 703979 A JP703979 A JP 703979A JP S55101010 A JPS55101010 A JP S55101010A
Authority
JP
Japan
Prior art keywords
detection output
photo
emitting element
light emitting
reference voltage
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
JP703979A
Other languages
Japanese (ja)
Inventor
Sukenobu Shimizu
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 JP703979A priority Critical patent/JPS55101010A/en
Priority to CA335,542A priority patent/CA1127304A/en
Priority to GB7931769A priority patent/GB2042181B/en
Priority to US06/075,421 priority patent/US4300390A/en
Priority to FR7923022A priority patent/FR2447539B1/fr
Priority to DE19792937426 priority patent/DE2937426A1/en
Publication of JPS55101010A publication Critical patent/JPS55101010A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To remove an influence of the variation in the peak value of photo detection output by fixing a reference voltage by the peak-detection output of photo detection output of a photo detector, and then by level-slicing the photo detection output by this reference voltage.
CONSTITUTION: Light, emitted by light emitting element 3, after passing through the slit of rotary disk 2 is detected by photo detector 4. The output of photo detector 4 is supplied to level slicer circuit LS and to amplifier A at the same time, and diode D and capacitor C detect its peak value, which is voltage-divided by R2 and R3 and supplied to level slicer circuit LS as reference voltage es. Further, the abovementioned peak value is fed back to light emitting element 3 by way of amplifier DA to stabilize a current through light emitting element 3.
COPYRIGHT: (C)1980,JPO&Japio
JP703979A 1979-01-24 1979-01-26 Photoelectric type position detecting system Pending JPS55101010A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP703979A JPS55101010A (en) 1979-01-26 1979-01-26 Photoelectric type position detecting system
CA335,542A CA1127304A (en) 1979-01-24 1979-09-13 Apparatus for determining positional coordinates utilizing the terrestrial magnetism as a directional reference
GB7931769A GB2042181B (en) 1979-01-24 1979-09-13 Determining positional coordinates utilising the terrestrial magnetism as a directional reference
US06/075,421 US4300390A (en) 1979-01-24 1979-09-14 Apparatus for determining positional coordinates utilizing the terrestrial magnetism as a directional reference
FR7923022A FR2447539B1 (en) 1979-01-24 1979-09-14
DE19792937426 DE2937426A1 (en) 1979-01-24 1979-09-15 ARRANGEMENT FOR DETERMINING THE LOCAL COORDINATES OF A MOVING OBJECT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP703979A JPS55101010A (en) 1979-01-26 1979-01-26 Photoelectric type position detecting system

Publications (1)

Publication Number Publication Date
JPS55101010A true JPS55101010A (en) 1980-08-01

Family

ID=11654896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP703979A Pending JPS55101010A (en) 1979-01-24 1979-01-26 Photoelectric type position detecting system

Country Status (1)

Country Link
JP (1) JPS55101010A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5826208A (en) * 1981-08-08 1983-02-16 Fujitsu Ltd Detector for position and speed
JPS61502211A (en) * 1984-05-22 1986-10-02 カ−　チヤネン−　エレクトロ−ニク　アクチエン　ゲゼルシヤフト electronic compass
JPS63231216A (en) * 1987-03-20 1988-09-27 Fujitsu Ltd Automatic setting system for slice level of sensor circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5826208A (en) * 1981-08-08 1983-02-16 Fujitsu Ltd Detector for position and speed
JPS61502211A (en) * 1984-05-22 1986-10-02 カ−　チヤネン−　エレクトロ−ニク　アクチエン　ゲゼルシヤフト electronic compass
JPS63231216A (en) * 1987-03-20 1988-09-27 Fujitsu Ltd Automatic setting system for slice level of sensor circuit

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