The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 1994
Filed:
Sep. 23, 1992
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A torque detecting system for detecting the torque acting on a rotational member has first and second magnetic heads provided spaced from each other in the axial direction of the rotational member, and a third magnetic head provided spaced from the first magnetic head by a predetermined angle .theta.o in a circumferential direction of the rotational member. First and second magnetic layers are provided on the peripheral of the rotational member and position signals are recorded on the respective magnetic layers through the first and second magnetic heads while the rotational member is rotating under no load. The position signals recorded on the magnetic layers are reproduced through the first to third magnetic heads while the rotational member is rotating under load. The phase difference .DELTA.t between the position signals reproduced by the first and second magnetic heads is detected and at the same time the time difference t between the position signals reproduced by the first and third magnetic heads is detected. The angle of torsion .theta. of the rotational member and the torque T thereon are calculated by use of the time difference t and the phase difference .DELTA.t.