Optics: measuring and testing – Angle measuring or angular axial alignment – Apex of angle at observing or detecting station
Patent
1996-10-03
1998-11-10
Buczinski, Stephen C.
Optics: measuring and testing
Angle measuring or angular axial alignment
Apex of angle at observing or detecting station
3561415, 35613903, G01B 1126, G01C 100
Patent
active
058352090
ABSTRACT:
A relative-angle detection apparatus which has an infrared-signal transmitting unit and an infrared-signal receiving unit. The transmitting unit includes a first light-emitting device array formed of a plurality of light-emitting devices disposed in a direction substantially coinciding with the fiducial axis for angle detection, and a second light-emitting device array formed of a plurality of light-emitting devices located to be slightly angled in the different directions with respect to the axis. The devices of the first light-emitting device array generate a continously-output first infrared signal in which an infrared signal is intermittently modulated by a first frequency and also modulated by a second frequency higher than the first frequency. The devices of the second light-emitting device array generate a second infrared signal in which an infrared signal is modulated by the first frequency and also divided into a plurality of signals so as to be output at different timings. The receiving unit detects and amplifies the first frequency contained in the first and second infrared signals and executes signal-processing on the amplified first frequency, thereby detecting the angle of the transmitting unit relative to the receiving unit.
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Saito Junichi
Uchio Masatoshi
Umeda Yuichi
Yamagata Kazuyoshi
Alps Electric Co. ,Ltd.
Buczinski Stephen C.
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