Automatic surveying apparatus using a laser beam
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United States of America Patent
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Jun 9, 1987
Grant Date -
N/A
app pub date -
May 21, 1984
filing date -
May 21, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An automatic surveying apparatus for surveying a route in tunneling work, for example, by directing a laser beam from a laser device onto a screen of a moving target to form a laser spot on the screen and detecting the positional coordinates of the laser spot on the screen by means of an image pick-up camera to obtain the positional deviation of the target with high accuracy. The angular deflections of the target can also be measured by use of a target composed of two screens and two image pick-up cameras.
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