Title:
DETECTOR FOR NUMBER OF REVOLUTION OF REVOLVING BODY
Document Type and Number:
Japanese Patent JPS57211512
Kind Code:
A
Abstract:
To determine the rotary speed of a toothed element (1), for example the starter gear of an internal combustion (IC) engine, or a toothed wheel coupled to a wheel of a vehicle for evaluation of the speed, and change in speed thereof, for use in a brake anti-block system, a magnetic field is generated, for example by a permanent magnet (3) which has both radial and tangential components with respect to the teeth (2) of the rotary element. A magnetic field dependent sensor (4) such as a Hall generator or a thin-film permalloy-type magneto-resistive sensor is positioned to respond to the tangential component of the magnetic field, to thereby eliminate shifts in the null or center line about which the field strength undulates as the disk rotates to permit ready evaluation of the output from the sensor by threshold circuitry.
Inventors:
PEETAA HAURAA
MANFURETSUDO ROOTOREI
EERITSUHI TSUAPURAA
MANFURETSUDO ROOTOREI
EERITSUHI TSUAPURAA
Application Number:
JP9505882A
Publication Date:
December 25, 1982
Filing Date:
June 04, 1982
Export Citation:
Assignee:
BOSCH GMBH ROBERT
International Classes:
G01P3/487; G01P3/488; G01D5/245; (IPC1-7): G01D5/20; G01P3/488