Importance

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Abstract

With an electrooptical distance meter impulses of light are transmitted over the distance. The distance is found by counting the duration of gating signals which last between transmission and reception of the light impulses. 10,000 times of travel generated by a first digital circuit (16, 17, 18) are communicated to a second digital circuit (1, 19, 20) for storing and processing. The distance is computed by the second circuit (1, 19, 20) by forming a mean value from the more frequent counts. By evaluation of artificial gating signals of various durations and by generation of gating signals from the light impulses by means of various threshold levels an improved accuracy of distance measurement is achieved, even when measuring on natural, non cooperative objects.

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First Claim