Apparatus for detecting air disturbances created by low level wi

Details Apparatus for detecting air disturbances created by low level wi Apparatus for detecting air disturbances created by low level wi

1980-08-04

1982-08-03

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250342, 374123, G01J 100

Patent

active

043429122

ABSTRACT:
Apparatus is described for detecting air disturbances created by low level wind shear. The apparatus includes optics for directing infrared radiation towards a continuously rotating chopper wheel having a plurality of infrared filters which have effectively different distance sensitivities and therefrom to a radiation sensor which produces an analog output signal that is demodulated by a synchronous demodulator. The demodulated signal is then routed through a gated integrator to a selective multiplexing circuit which has a plurality of output channels and is controlled by an electronic detector connected with the chopper wheel. Each channel includes a low pass filter and the outputs therefrom are coupled to a signal processor which thus receives periodically updated information to provide a display indicative of sensed air disturbances due to low level wind shear.

REFERENCES:
patent: 3696670 (1972-10-01), Collis
patent: 3856402 (1974-12-01), Low et al.
patent: 3935460 (1976-01-01), Flint
patent: 4266130 (1981-05-01), Kuhn

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