Geodetic instrument and related method

Details Geodetic instrument and related method Geodetic instrument and related method

2011-03-22

2011-03-22

Bennett, G. Bradley (Department: 2841)

Geometrical instruments

Straight-line light ray type

Level

Reexamination Certificate

active

07908752

ABSTRACT:
A geodetic instrument is disclosed, wherein an image sensor is used for locating the instrument above a desired point on the ground. The positioning of the image sensor with respect to the instrument vertical rotation axis is determined, or calibrated, using a method where two images are captured at different horizontal rotational positions for the instrument, and where the center pixel of the image sensor is related to the vertical rotation axis by means of image processing. It is also disclosed how reflecting elements, such as prisms, may be used for providing stereoscopic vision that can be used for determining the instrument height above the ground.

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patent: 2006/0021236 (2006-02-01), Endo
patent: 2009/0260240 (2009-10-01), Bernhard et al.
patent: 2010/0119161 (2010-05-01), Moeller
patent: 2010/0186243 (2010-07-01), Schumacher
patent: 2010/0232714 (2010-09-01), Moeller
patent: 0 971 207 (2000-01-01), None

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