JPS5618712A - Azimuth transducer - Google Patents

Abstract

PURPOSE: To obtain a digital signal which has a prescribed relationship with an azimuth angle, by generating a pulse in a phase angle position corresponding to the azimuth angle and using the pulse to pick out and hold the clock count content of a counter.

CONSTITUTION: The output of a synchro transmitter 2 is supplied to a means 5 through a Scott-connected transformer 10 so that the output is changed into DC signals Vcosθ, Vsinθ corresponding to an azimuth angle θ. Both the DC signals are applied to a pulse generation means 6. A pulse pk of phase corresponding to the azimuth angle is produced by the means 6 from both the DC signals and reference signals Vcosωt, Vsinωt which have reference phases and are supplied from comparators 13a, 13b. Clock pulses of frequency integer times more than that of the reference signal Vsinωt are generated by a clock signal source 7 synchronously with the reference signal. The clock pulses counted by a counter 8. The count content of the counter is picked out into a holding means 9 by the pulse pk. As a result, a digital value having a prescribed relationship with the azimuth angle can be obtained independently of the type of a gyro 1.

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