Angular position sensors

Details Angular position sensors Angular position sensors

1985-04-03

1987-08-04

Buczinski, Stephen C.

Optics: measuring and testing

Angle measuring or angular axial alignment

With photodetection remote from measured angle

356 1, G01B 1126, G01C 300

Patent

active

046842497

ABSTRACT:
An angular position sensor for sensing the relative angular position of a helmet worn by a passenger in an aircraft with respect to the aircraft is disclosed. The sensor includes three spaced linear photodetector arrays fixed to the aircraft, and a light source mounted on the helmet and arranged to produce a light beam which rotates cyclically about an axis in the helmet so as to successively irradiate a photodetector within each array within each cycle. A sensor attached to the helmet produces a time datum signal during each cycle. A computer uses the location within the arrays of the irradiated photodetectors, and the relative timing of the irradiations with respect to the time datum to provide the required azimuth, elevation and roll angles of the helmet.

REFERENCES:
patent: 3375375 (1968-03-01), Abbey et al.
patent: 4193689 (1980-03-01), Reymond et al.
patent: 4441809 (1984-04-01), Dudley et al.
patent: 4475814 (1984-10-01), Marche
patent: 4568182 (1986-02-01), Modjallal
Proceedings of S.I.D., vol. 19(1978) 4th Quarter, No. 4, pp. 181-185.

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