Distance measurement device

Details Distance measurement device Distance measurement device

1995-10-02

1998-07-14

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

With photodetection

342105, 342110, G01C 308, G01S 1358

Patent

active

057812829

ABSTRACT:
A distance measurement device is provided which determines the measurement zone of an object and also determines the direction of movement of the object within the measurement zone. The distance measurement device comprises distance measurement means for measurement a distance to an object, judging means for judging which measurement zone from a plurality of measurement zones divided within the full distance measurement range of the distance measurement means that the object belongs to, storing means for storing the distance measurement result, movement detection means for comparing a current distance measurement result with a preceding distance measurement result stored in the storing means, determining whether the object has moved away from, toward, or remained stationary with respect to the distance measurement means in accordance with the comparison result, and output means for generating a first output signal in accordance with a judgement result of the judging means and a second output signal in accordance with a determination of the movement detection means.

REFERENCES:
patent: 4527894 (1985-07-01), Goede et al.
patent: 5049887 (1991-09-01), Henning et al.

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