| 摘要 |
In a road construction machine (1) with a machine frame (2), a chassis (4) carrying the machine frame (2) in a single plane, said chassis (4) moving on a ground surface (6) in the direction of travel (9) and comprising height adjustment devices (8) which adjust the position of the plane of the machine frame (2) in accordance with control signals of a levelling device (10), where the levelling device (10) measures the distance of the ground surface (6), at a current reference location (12) of the ground surface (6), to the machine frame (2) and controls the height adjustment devices (8) in such a fashion that the machine frame (2) is movable at an adjusted orthogonal distance to the reference location (12) of the ground surface (6), it is provided that a transmitter (15) is arranged at the machine frame (2) in a rigid fashion, and a receiver (16) is movable, parallel to and synchronously with the machine frame (2), next to the machine frame (2) along the current reference location (12), or that a receiver (16) is arranged at the machine frame (2) in a rigid fashion, and a transmitter (15) is movable, parallel to and synchronously with the machine frame (2), next to the machine frame (2) along the current reference location (12), where the transmitter (15) emits at least one measuring beam (17) representative of a reference plane (14), said measuring beam (17) being detectable by the receiver (16) and representing either a plane extending parallel to the machine frame (2) or a plane extending parallel to the ground surface (6) at the reference location (12), where the current distance of the machine frame (2) to the current reference location (12) is measurable from the detected position of the reference plane (14). |
