Omnidirectional airspeed system

Details Omnidirectional airspeed system Omnidirectional airspeed system

1980-05-15

1982-11-23

Gruber, Felix D.

Boots, shoes, and leggings

73178R, 73182, 364440, G01C 2110, G06F 1520

Patent

active

043608884

ABSTRACT:
A microprocessor receives sensor signals and produces signals proportional to total, longitudinal and lateral air speed. An omnidirectional air speed sensor uses pressure samplers on a rotating arm to produce a sinusoidal pressure differential signal related to air speed. An interrupter disc rotating with the arm periodically exposes an opto-electric sensor to light to produce a pulse phase reference signal. In one embodiment, the pulse signal operates a first ramp generator to produce an arm RPM signal and operates a second ramp generator in conjunction with the sinusoidal signal to produce an azimuth reference signal. The RPM and azimuth signals are fed to a processor to resolve the air speed into longitudinal and lateral components. In the preferred embodiment, the processor receives the pulse signal and produces a pair of out-of-phase square wave signals which control chopper modulators which demodulate the sinusoidal signal to produce signals proportional to lateral and longitudinal speed.

REFERENCES:
patent: 3332282 (1967-07-01), Daw
patent: 3400584 (1968-09-01), Beilman
patent: 3584783 (1971-06-01), Kobori
patent: 3726139 (1973-04-01), Beilman
patent: 4065957 (1978-01-01), Beilman
patent: 4074570 (1978-02-01), Beilman et al.
patent: 4163387 (1979-08-01), Schroeder
patent: 4181962 (1980-01-01), West, Jr. et al.

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