Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1984-02-06
1987-08-18
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307515, 324208, 340679, H03K 500, H03K 526, G01B 714, G08B 2100
Patent
active
046879528
ABSTRACT:
A magnetic transducer (10) mounted on a turbine engine forms a sinusoidal signal N.sub.1 as the teeth of a gear (14) attached to the engine shaft pass the head of the magnetic transducer. One tooth of the gear is a "short tooth", having its tip slightly shaved, and acts as a reference point from which angular deviation is measured. The sinusoidal signal N.sub.1 is first presented to a AGC (24) to maintain the peak-to-peak amplitude of the sinusoidal signal within a predetermined range. A pulse generator (32) forms a spike pulse each time the short tooth passes the magnetic transducer (10). A comparator circuit (40) uses the spike pulse to enable a one shot (44) creating a reference pulse of a specific length. A counter circuit (48), clocked by a zero axis detector (50), is provided for ensuring that only one reference pulse is generated for each rotation of the gear (14).
REFERENCES:
patent: 3727202 (1972-01-01), Fort
patent: 3930201 (1974-09-01), Ackermann et al.
patent: 4060707 (1976-03-01), Olsson et al.
patent: 4072893 (1976-06-01), Huwyler
patent: 4238960 (1978-11-01), Curtis et al.
patent: 4419894 (1983-12-01), Matumoto
Miller Stanley D.
Phan Trong Quang
United Technologies Corporation
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