Leica Geosystems Ag

Beamrider Limited

Christian Betschon

Peter Kipfer

Bernd Walser

Bernhard Braunecker

Beat Aebischer

Iain McGuffie

Bernhard G&auml;chter

Ernst Ramseier

Georg Orawez

Esther Rutishauser

Jeremy Nicholls

An application controller for an application unit, for marking substances comprises a radiation sensor, by means of which the relative position of the application unit relative to a reference plane may be determined. The relative position of the application unit can be determined by means for recording the orientation of the application unit controller relative to the reference plane from the association of position with orientation information, such that control instructions, in particular for positional correction may be generated by the application unit controller. The position of the application unit can be adjusted by an actuator device according to the control instructions.

Application controller

A reference beam generator () for guiding a field marker for ground markings has a support element () which can be positioned in a defined manner relative to the Earth's surface, a laser diode and beam guidance means for the emission of the radiation (LS) to at least one reference target (), the radiation (LS) being emitted with an asymmetrical beam cross-section (), in particular in the form of a fan, and the beam guidance means being adjustable in a defined manner relative to the support element (). The radiation (LS) can be aligned with the reference target () by an optical detection component for detecting and providing the radiation reflected by the reference target, in particular a telescope ().

Reference beam generator and system for producing guide beams for field markers

To measure the distance to targets, local maxima exceeding a threshold (&egr;) and being associated with a correlation function (f) are determined, the reference values of which are obtained from scalar products of a received signal (e), produced by reflections of an optical pulse by the targets, and number of comparison functions, copies of a reference function (r) which are shifted as a function of time, and the transit times of the reflections are derived from the time-related shifts of the corresponding comparison functions. By interpolation with respect to the time-related shifts or optimization thereof, for example by adjusting them so that the orthogonal distance of the received signal (e) from the vector space which is spanned by the corresponding comparison functions is a minimum, the transit times can be determined even more accurately.

Method for measuring the distance to at least one target

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Heiden, Switzerland

Christian Betschon