ROTATION ANGLE DETECTION DEVICE AND ROTATION ANGLE DETECTION METHOD

PROBLEM TO BE SOLVED: To provide a rotation angle detection device and a rotation angle detection method which reduce power consumption. SOLUTION: A magnetic resistance element 11 outputs a signal changing in one period at every rotation at a prescribed angle of a steering shaft, repeatedly followin...

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Bibliographic Details
Main Authors ARAKI MOTOHISA, KONDO SEIJI, NITTA SHIGENORI, FUTAMURA YASUHIKO, UMEHARA KEIICHI, ITO SHIGEJI
Format Patent
LanguageEnglish
Published 26.08.2004
Edition7
Subjects
ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS
LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
MEASURING
MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE
MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
MOTOR VEHICLES
PERFORMING OPERATIONS
PHYSICS
TARIFF METERING APPARATUS
TESTING
TRAILERS
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To provide a rotation angle detection device and a rotation angle detection method which reduce power consumption. SOLUTION: A magnetic resistance element 11 outputs a signal changing in one period at every rotation at a prescribed angle of a steering shaft, repeatedly following rotation of a rotator. A microcomputer 12 calculates the rotation angle of the steering shaft based on a signal period and a signal value from the magnetic resistance element 11. The microcomputer 12 operates the magnetic resistance element 11 in a prescribed basic sampling period in the engine stop state, and changes the sampling period according to the rotation speed of the steering shaft so that a constant rotation angle can be always detected when the rotation of the steering shaft is detected. COPYRIGHT: (C)2004,JPO&NCIPI
Bibliography:Application Number: JP20030028627