Speed detection apparatus for camera

Details Speed detection apparatus for camera Speed detection apparatus for camera

1991-06-25

1992-08-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250561, 354403, G01J 120

Patent

active

051361485

ABSTRACT:
A speed detection apparatus includes a projection unit for repetitively projecting a pulse beam toward an object. A light-receiving unit is arranged to be separated from the projection unit by a base length, receives the pulse beam reflected by the object, and generates an output according to the light-receiving position. A distance calculation unit calculates a distance signal according to a distance to the object upon reception of an output from the light-receiving unit. An integration circuit integrates the distance signal every time the pulse beam is projected. A speed calculation unit calculates a moving speed of the object on the basis of an output from the integration circuit.

REFERENCES:
patent: 4247761 (1981-01-01), Stein
patent: 4660955 (1987-04-01), Ishida et al.
patent: 4855585 (1989-08-01), Nonaka

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