Patent ID: 6916070

Claim:
Laser-regulating means for a construction machine for adjusting the height of a height-adjustable machining tool, comprising a first laser measuring head, a second laser measuring head, and a third laser measuring head, which are arranged at the construction machine, with the first laser measuring head and the second laser measuring head being arranged at a first angle to each other, with the first laser measuring head and the third laser measuring head being arranged at a second angle to each other, with the first angle and the second angle being selected such that a first measuring point of the first laser measuring head, a second measuring point of the second laser measuring head, and a third measuring point of the third laser measuring head are spaced from each other on a reference surface, with the first measuring point, the second measuring point, and the third measuring point being arranged essentially behind each other in the direction of motion of the construction machine; and an evaluating means, which, depending on output signals of the first laser measuring head, the second laser measuring head, and the third laser measuring head, determines a first distance of the first laser measuring head from the reference surface, a second distance of the second laser measuring head from the reference surface, and a third distance of the third laser measuring head from the reference surface, on the basis of the determined distances and the known geometric arrangement of the first laser measuring head, the second laser measuring head, and the third laser measuring head relative to the machining tool, calculates the height of the machining tool relative to the reference surface and, depending on the calculated height and a target height, generates a height-control signal for the machining tool.