Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With towing
Patent
1981-12-21
1985-06-04
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
With towing
33363K, 250231SE, 367 19, G01S 380, G01C 1726
Patent
active
045218757
ABSTRACT:
A thin-line heading sensor is disclosed having an outside diameter of less than an inch which is accurate to within 1.degree. of arc. The invention includes a magnetic wheel having a reflective multifaceted perimeter. The facets are optically coded for identification. When the wheel is illuminated by a collimated beam of light, a beam is reflected onto an array of photodetectors. The photodetectors are coupled with an electronic circuit which decodes the position and pattern of illumination to determine the position of the magnetic wheel.
REFERENCES:
patent: 3577000 (1971-05-01), Warner
patent: 3888016 (1975-06-01), Fowler
patent: 3940609 (1976-02-01), Johnstun
patent: 3950859 (1976-04-01), Kramer
patent: 4047168 (1977-09-01), Fowler
patent: 4064435 (1977-12-01), Stebbins
patent: 4231111 (1980-10-01), Neeley
patent: 4304630 (1981-12-01), Tanner
patent: 4320293 (1982-03-01), Guretzky
Benman, Jr. William J.
Farley Richard A.
Hughes Aircraft Company
Karambelas Anthony W.
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