Abstract: A method for determining a reference station setup point for setting up a reference station includes moving a construction machine to a waypoint. At this waypoint, position data describing the position of a construction machine reference point on the construction machine are determined on the basis of the satellite signals of a global navigation satellite system and the correction signals of a reference station already set up on site in the vicinity of the earthmoving machine. The position data describing the position of the reference station setup point are determined based on the position data describing the position of the construction machine reference point on the construction machine at this waypoint and on the basis of a specified spatial relationship between the construction machine reference point and the point specified as the reference station setup point on the ground surface.

Abstract: A system of differential working is provided wherein a controller of a construction machine is provided with a working depth data set and with a design surface data set. A location of the construction machine within a reference system external to the construction machine is determined, for example using a global navigation satellite system. The controller may determine the desired working depth at the current locations of the ends of the working implement from the working depth data set. The controller may determine the desired cross-slope at the current location of the working implement from the design surface data set. The desired working depths and the desired cross-slope may be communicated to a grade control system of the controller.

Abstract: A construction machine uses a controller configured to determine a cross-sectional profile of a design surface at a selected position and orientation of a milling drum of the construction machine. The controller automatically determines a preferred sensor sub-set from a plurality of possible sensor sub-sets selected from a set of available sensors. The preferred sensor sub-set must be usable to create at least a portion of the cross-sectional profile of the design surface. The controller automatically maintains or switches control of the milling depth to use the preferred sensor sub-set.

Abstract: A system is provided for determining the plausibility that a current ground surface on which a construction machine is located conforms to a prior survey of that ground surface. A controller is provided with a digital model defined within a reference system external to the construction machine. The controller determines a current relative orientation and an expected relative orientation, of at least one sensor pair of a plurality of distance sensors, relative to each other and relative to a reference plane defined in the digital model. The controller compares those orientations to confirm whether the current relative orientation conforms to the expected relative orientation.

Abstract: A system is provided for determining the plausibility that a current ground surface on which a construction machine is located conforms to a prior survey of that ground surface. A controller is provided with a digital model defined within a reference system external to the construction machine. The controller determines a current relative orientation and an expected relative orientation, of at least one sensor pair of a plurality of distance sensors, relative to each other and relative to a reference plane defined in the digital model. The controller compares those orientations to confirm whether the current relative orientation conforms to the expected relative orientation.

Abstract: A construction machine uses a controller configured to determine a cross-sectional profile of a design surface at a selected position and orientation of a milling drum of the construction machine. The controller automatically determines a preferred sensor sub-set from a plurality of possible sensor sub-sets selected from a set of available sensors. The preferred sensor sub-set must be usable to create at least a portion of the cross-sectional profile of the design surface. The controller automatically maintains or switches control of the milling depth to use the preferred sensor sub-set.

Abstract: A construction machine uses a controller configured to determine a cross-sectional profile of a design surface at a selected position and orientation of a milling drum of the construction machine. The controller automatically determines a preferred sensor sub-set from a plurality of possible sensor sub-sets selected from a set of available sensors. The preferred sensor sub-set must be usable to create at least a portion of the cross-sectional profile of the design surface. The controller automatically maintains or switches control of the milling depth to use the preferred sensor sub-set.

Abstract: A system of differential working is provided wherein a controller of a construction machine is provided with a working depth data set and with a design surface data set. A location of the construction machine within a reference system external to the construction machine is determined, for example using a global navigation satellite system. The controller may determine the desired working depth at the current locations of the ends of the working implement from the working depth data set. The controller may determine the desired cross-slope at the current location of the working implement from the design surface data set. The desired working depths and the desired cross-slope may be communicated to a grade control system of the controller.