Electricity: motive power systems – Positional servo systems – With stabilizing features
Patent
1983-07-15
1985-03-05
Dobeck, B.
Electricity: motive power systems
Positional servo systems
With stabilizing features
318561, 318603, G05B 501
Patent
active
045033749
ABSTRACT:
Disclosed are a method and apparatus for providing speed information based on position pulses from a position detector for the purpose of controlling the speed of a motor. The invention includes a circuit for receiving the position pulses, and for counting the number N of pulses within a fixed period To. Measuring an interval T1 between a position pulse generated just prior to the fixed period To and the instant at which the period To begins and for measuring an interval T2 between the final position pulse generated in the period To and the instant at which the period To ends. The operation T=To+T1-T2 is performed to obtain the time T required for input of the position pulses, the time T is divided by the number N of pulses, and speed information V is obtained by performing the operation V=K.multidot.N/T, where K is a proportional constant.
REFERENCES:
patent: 3829785 (1974-08-01), Schroder et al.
patent: 3892952 (1975-07-01), Shibata et al.
patent: 4295171 (1981-10-01), Hirota
patent: 4315200 (1982-02-01), Yamada
patent: 4376914 (1983-03-01), Kimura
Dobeck B.
Fanuc Ltd.
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