Leica Geosystems Ag

Andreas Buehlmann

Peter Arnold Stegmaier

Matthew Desmond

Werner Vitus Stempfhuber

Volker Kuch

Urs Steger

Peter A Stegmaier

Chronologically correlated position pairs are generated in a position determination method using a unit, particularly a working machine (), that changes its own position, having a GNSS receiver () and an optically measurable reference point (A) disposed in a spatially stationary manner, particularly an all-around prism (), and having a geodetic device with a distance- and angle-measuring functionality, particularly a tacheometer (). To this end, relative positions of the reference point (A) are determined in an interior reference system by optically measuring distance and at least one angle of the geodetic device to the reference point (A) and GNSS positions of the GNSS receiver in an exterior reference system. Equal times, or relative and GNSS positions allocated to a time frame are associated with each other, particularly in pairs, thus forming position pairs. In addition, the position pairs perform a derivation from a balanced relationship between the exterior and interior reference system, particularly from balanced transformation parameters, and determine the position of the unit, of the geodetic device, and/or of the measurable new point from said balanced relationship.

Position determination method

The invention relates to a sideways drift correction device for a mobile production machine comprising a removal of material and a tool for processing the removed material, having a sensor component and an evaluation component. The sensor component detects the structure of at least one part of the underground surface relative to which the production machine moves. The evaluation component determines the relative motion direction of a reference point on the production machine relative to the subsoil from the time-variable information of the underground surface, and derives steering correction information therefrom.

Sideways drift correction device

The aim of the invention is to monitor the travel way of a road processing machine that drives on a basic surface as well as the working height of a working part which is disposed thereon in a vertically adjustable manner. Said aim is achieved by detecting the three-dimensional position of a positional element, determining a direction of travel from at least two three-dimensional positions, and determining the working height of the working part. The determined direction of travel is compared to a setpoint direction while the working height is compared to a setpoint height. The positional element is placed in a position that is at a horizontal distance from the working part.

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Merligen am Thunersee, Switzerland

Andreas Buehlmann