Arrangement for locating radiaring sources
Method and apparatus for determining position
Device for determining the spatial position of an object
Optical system for determining the position of a cursor Patent #: 4568182
ApplicationNo. 06/719287 filed on 04/03/1985
US Classes:356/139.03, Relative attitude indication along 3 axes with photodetection356/141.3, With unidirectional or planar source beam directed at the photodetecting station356/152.1With photodetection remote from measured angle
ExaminersPrimary: Buczinski, Stephen C.
Attorney, Agent or Firm
International ClassG01D 5/26 (20060101)
Foreign Application Priority Data1984-04-09 GB
AbstractAn 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.