Apparatus for computing the change in bearing of an object

Details Apparatus for computing the change in bearing of an object Apparatus for computing the change in bearing of an object

1978-09-27

1981-01-27

Atkinson, Charles E.

Boots, shoes, and leggings

324 83R, 324 83D, 235 92PS, G01R 2500

Patent

active

042478987

ABSTRACT:
Apparatus is described for computing the change in bearing of an object during a time period T from continuously-received signals E.sub.x and E.sub.y having amplitudes proportional to x and y components of the bearing of the object. A switch is operated under control of a two-phase clock to connect the signals E.sub.x and E.sub.y in respective phases to a summer. The output of the summer is filtered to derive a sine wave, which is then translated to a square wave. The phase difference between the square wave and an output of the clock is a measure of the bearing of the object. Means to determine the change in phase of the square wave during the time period T provides a measure of the change in bearing of the object.

REFERENCES:
patent: 3683345 (1972-08-01), Faulkes et al.
patent: 3706931 (1972-12-01), Subramanian
patent: 3854133 (1974-12-01), Cabion
patent: 3882501 (1975-05-01), Botzum et al.
patent: 3980948 (1976-09-01), Olive
patent: 4070618 (1978-01-01), Thomas
patent: 4112365 (1978-09-01), Larson et al.
patent: 4130793 (1978-12-01), Bridges et al.

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