Title:
WHEEL VELOCITY SENSOR
Document Type and Number:
Japanese Patent JPS5734455
Kind Code:
A
Abstract:
PURPOSE: To obtain a rotary pulse corresponding to the normal rotational frequency only by slightly deviating the phase of slits on the inner and outer circumferences with an optical rotary disc.
CONSTITUTION: Slits on the inner circumference of a rotary disc 1 are delayed by 9° in the phase from those on the outer circumference so that the tail of the slits B overlaps the head of the slits C. Light passing through the slits converted with photoelectric converters 14 and 15 into two pulse trains b and c deviated in the phase. Input gate circuits 18 and 19 output status signals e, f, i and j according to the signals b and c. Thus, Memories 20 and 21 output a binary signal corresponding to the frequency of the normal rotation only.
Inventors:
YOSHIDA KENICHI
ITSUSHIKI NORIO
NISHIWAKI YOSHIKAZU
TSUNO KOUICHI
ITAI YASUO
ITSUSHIKI NORIO
NISHIWAKI YOSHIKAZU
TSUNO KOUICHI
ITAI YASUO
Application Number:
JP10967080A
Publication Date:
February 24, 1982
Filing Date:
August 09, 1980
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES
International Classes:
G01D5/36; G01P3/486; G01P13/04; (IPC1-7): G01D5/26; G01P3/486; G01P13/00