Construction laser system having a rotation laser and a laser receiver, with functionality for automatic determination of the laser receiver direction

A method for laser receiver direction determination, the method being adapted for use with a laser system that includes:

• a rotation laser, having a laser unit and a continuously rotatable deflection means, for emission of a rotating laser beam such that the rotating laser beam defines a reference surface;
• a laser receiver having a laser beam detector extending at least over a one-dimensional region on the laser receiver, so that the laser receiver is formed in order to generate an output signal as a function of incidence of the laser beam on the laser beam detector;
• and
• a memory that stores:
• a plurality of defined rotation angle ranges relating to rotation of the deflection means;
• and
• a digital code respectively assigned uniquely to the respective rotation angle ranges, the digital code including a state value sequence based on a defined sequence of states relating to the laser beam, the states being taken from a set of at least two defined different discrete states relating to the laser beam,
• wherein the method comprises:
• controlling, synchronously with the deflection means rotation, the emission of the laser beam in relation to the at least two different discrete states, such that, in the respective rotation angle ranges, the sequence of states relating to the laser beam, which corresponds to the respective rotation angle range, is respectively generated in the course of a series of rotational passes of the deflection means, by successively occurring crossings of the respective rotation angle range;
• acquiring an output signal sequence of successively arriving output signals;
• identifying a state value sequence among the stored state value sequences, which corresponds to the output signal sequence;
• and
• determining a laser receiver direction in which the laser receiver lies in sight of the rotation laser, as a function of that rotation angle range which is assigned to the code corresponding to the identified state value sequence.