Electronic altitude encoder

Details Electronic altitude encoder Electronic altitude encoder

1977-05-25

1979-01-23

Woodiel, Donald O.

Measuring and testing

Barometer

364433, G01L 700, G01C 2100

Patent

active

041354036

ABSTRACT:
An encoder is disclosed for providing an accurate digital representation of the altitude of an aircraft vehicle by comparing an output signal from a pressure transducer which is a function of the barometric pressure at the altitude of the vehicle with an internally generated waveform which represents a curve of altitude vs. barometric pressure on its X--Y axis. The waveform is generated by a closed loop having an integrator circuit for providing the waveform, a comparator, a filter, a voltage controlled oscillator, and a counter, which all maintain the amplitude of the waveform within precise limits. The output signal from the transducer and the wave form from the closed loop are compared by a second comparator to provide a signal which transfers temporary information in the counter to a storage device which provides a coded digital output of the altitude of the vehicle.

REFERENCES:
patent: 3729999 (1973-05-01), Shimomura
patent: 3958108 (1976-05-01), Shimonura
patent: 3958459 (1976-05-01), Shimomura

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