Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1994-02-01
1996-04-02
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
180169, 356 501, G01C 308, B60T 716, B62D 124
Patent
active
055045707
ABSTRACT:
Disclosed is a distance measuring apparatus having a clock generating element, a light emitting element, a light receiving element, a sample pulse generating element, a sample hold element and a processing element. The clock generating element generates a clock pulse at a predetermined time interval. The light emitting element generates a pulse beam in synchronism with the clock pulse. The light receiving element receives a reflected pulse beam from an object and converts it into an electric signal. The sample pulse generating element generates a sample pulse at a timing delayed by a predetermined minute time from a generating time of the clock pulse within one measuring period. The sample hold element effects sampling of an output signal from the light receiving element with the sample pulse. The processing element calculates a distance to the object by detecting it from the output signal of the sample hold element and from the delay time of the sample pulse. The processing element stops a generation of the pulse beam by the light emitting element with the measuring period determines an existence or non-existence of interference from the other light source exclusive of the light emitting element.
REFERENCES:
patent: 3900261 (1975-08-01), Wingate
patent: 4344705 (1982-08-01), Kompa et al.
patent: 5126555 (1992-06-01), Hawryluk
patent: 5262837 (1993-11-01), Shyy
Buczinski Stephen C.
Mitsubishi Denki & Kabushiki Kaisha
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