Patent ID: 9207077
Filing Date: 2015-12-08
Classification: G01C

Abstract:
1. A construction laser system comprising: a rotation laser having a laser unit and a rotatable deflection means for emitting a rotating laser beam, wherein the rotating laser beam defines a reference surface; a laser receiver for determining a position relative to the reference surface, having a laser beam detector designed for generating an output signal when the laser beam impinges on the laser beam detector; an evaluation unit for determining the position of the laser receiver relative to the reference surface; and an indicator for the position determined, in particular designed for indicating whether the laser receiver exactly coincides with the reference surface; and a controller for the laser unit, which controller is designed in such a way that a known emission pattern is generated over a sequence of a plurality of revolutions by varying the emission of the laser beam in a manner temporally coupled to the revolution duration of the deflection means; and wherein the evaluation unit is designed for identifying the reference surface on the basis of a sequence of output signals generated by the laser beam detector in each case when the rotating laser beam repeatedly successively impinges, which sequence corresponds to the known emission pattern.