The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 2004
Filed:
Jan. 17, 2003
Paul Benz, Diepoldsau, CH;
Markus Geser, Goldach, CH;
Roland Graf, Untereggen, CH;
Bruno Pfiffner, Hochwiese, CH;
Marcel Buerki, Au, CH;
Marco Landert, Speicher, CH;
Markus Hammerer, Fraxern, AT;
Jürg Hinderling, Marbach, CH;
Günther Hanns, Widnau, CH;
Gerhard Bayer, Lindau, DE;
Leica Geosystems, AG, Heerbrugg, CH;
Abstract
In geodetic measuring systems and measuring devices ( ) there exists a need to find and detect, rapidly and automatically, marker points to be measured that are provided with a marker (retro reflector) ( ). For the rapid detection, identification and determination of the horizontal angles of such a marker, even at greater distances, electromagnetic radiation in the form of a vertical fan ( ) is transmitted by a transmitter unit ( ) whose radiation is received, after reflection from the marker, by a receiving unit with a view field in the form of a vertical fan. By analyzing the signal strength and the apparent object size, a plausibility test and a reliable suppression of foreign or interference markers can be achieved. Such a marker searching device is marked by a selective analysis of specific characteristics of a marker detected. On the basis of the plausibility test, a rapid, certain and robust location of markers is possible.