Electricity: measuring and testing – Electrical speed measuring
Patent
1989-07-28
1991-02-12
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Electrical speed measuring
G01P 342
Patent
active
049927302
ABSTRACT:
A method of computing the rotating speed of a rotating body includes the steps of setting speed computation reference time periods with respect to a pulse train signal obtained from the output of a rotating speed sensor; measuring time length from the last pulse edge in the previous speed computation reference time period to the last pulse edge in the current speed computation reference time period; and computing the rotating speed of the rotating body on the basis of the result of the time length measurement. The time point when the previous procedure of speed computation terminated corresponds to the time point when the current procedure of speed computation starts, thus making it possible to achieve continuous speed computation. In this way, an enhanced accuracy can be achieved in speed measurement for low speed range, which leads to improved control performance in anti-lock control and traction control for the low speed range.
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patent: 4527248 (1985-07-01), Takase et al.
patent: 4531090 (1985-07-01), Hill
patent: 4609869 (1986-09-01), Metcalf
patent: 4885710 (1989-12-01), Hersberger et al.
Akebono Brake Industry Co. Ltd.
Edmonds Warren S.
Eisenzopf Reinhard J.
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