Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1989-04-14
1990-12-04
Strecker, Gerard R.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
G01P 3489
Patent
active
049756427
ABSTRACT:
A system (apparatus and method) for measuring a revolution speed of a rotary member improves accuracy by estimating the speed during a unit operation period in response to pulse signals detected from the rotary member. When a pulse signal is not detected, the system obtains the revolution speed by selecting the lesser of a first estimated value and a second estimated value. The first estimated value is determined on the basis of the calculated revolution speed during the previous unit operation period and also the calculated acceleration during that previous operation period. The second estimated value is determined on the basis of a lapse time between a detected time of the last signal and the completion time of the current unit operation period. If a pulse is subsequently detected in the next unit operation period, the revolution speed is determined by comparing the toal number of pulses detected in the next unit operation period with the total time between the last pulse of the previous unit operation period and the last pulse of the next unit operation period.
REFERENCES:
patent: 4281388 (1981-07-01), Friend et al.
patent: 4355364 (1982-10-01), Gudat
patent: 4358828 (1982-11-01), Reid et al.
patent: 4408290 (1983-10-01), Kubo et al.
patent: 4409664 (1983-10-01), Skarvada
patent: 4470011 (1984-09-01), Masuda
patent: 4564917 (1986-01-01), Yamada et al.
patent: 4569027 (1986-02-01), Nakano et al.
patent: 4584528 (1986-04-01), Ohmae et al.
patent: 4667297 (1987-05-01), Kawai
patent: 4716535 (1987-12-01), Yoshida et al.
patent: 4811232 (1989-03-01), Hoashi et al.
Masao Ishikawa, "Electronic Speed Indicator for Vehicle", Patent Abstracts of Japan, Nov. 19, 1982, p. 156.
Matsumoto Tatsuji
Takata Koji
Edmonds Warren S.
Strecker Gerard R.
Sumitomo Electric Industries Ltd.
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