Orientation monitoring apparatus

Details Orientation monitoring apparatus Orientation monitoring apparatus

1990-09-20

1991-10-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250561, 356141, G01N 2186, G01V 904

Patent

active

050597817

ABSTRACT:
The orientation of a helmet is monitored by illuminating the cockpit volume by a moving interference pattern produced by three beams. The sensors detect the varying phase to produce outputs which are compared to determine the orientation of the helmet.

REFERENCES:
patent: 4956794 (1990-09-01), Zeeui et al.

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