Coded data generation or conversion – Phase or time of phase change – Synchro or resolver signal
Patent
1987-09-17
1989-12-26
Shoop, Jr., William M.
Coded data generation or conversion
Phase or time of phase change
Synchro or resolver signal
341114, 318696, H03M 164
Patent
active
048901059
ABSTRACT:
A compass data converter converts 180X and 90X synchro compass data to 1/6 degree step data. 180X synchro data is converted by utilizing a 360X to 1/6 degree step data converter that divides the synchro rotation into six 60.degree. sectors providing a digital step data code representative thereof. A 180X converter further sub divides the 60.degree. sectors into 30.degree. sub sectors by selecting a synchro output in accordance with the step data code from the 360X converter and comparing the selected synchro output to ground to provide an additional step data digit. The converter for 90X data further sub-divides the 30.degree. sub-sectors into 15.degree. intervals by selecting two synchro outputs in accordance with the 360X step data code and the additional step data digit and scaling one of the selected synchro outputs to equal the other selected synchro output at the 15.degree. interval boundaries. A comparison of the selected unscaled synchro output and the selected scaled synchro output provides a fifth step data digit for the 90X code.
REFERENCES:
patent: 4031531 (1977-06-01), Rice et al.
patent: 4398353 (1983-08-01), Wesner
patent: 4401932 (1983-08-01), Hermansdorfer et al.
patent: 4430640 (1984-02-01), Hermansdorfer et al.
Bean Donald E.
Coleman Billy M.
Levine Seymour
Shoop Jr. William M.
Sperry Marine Inc.
Young Brian K.
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