LAUSR

Abstract The elevator guide rails geometry, which covers such features as rectilinearity, verticality, parallelism and span, is of key importance as uninterrupted, failure-free operation of elevators and safety of elevators’ users are prerequisites. The geometric parameters have to measured and controlled periodically according to elevators industry standards. The paper discusses the construction and principles of operation of developed Multi-Sensors Measuring System (MSMS) in the control of geometric parameters of elevator guide rails. The system is made of laser rangefinders and two laser emitters with a collimation system. To detect and register the location of laser spots the system uses CCD/CMOS detectors. The elements of the system are deployed in the elevator shaft. This solution allows you to control the position of the laser beams in the external reference system and to determine the torsion angles of the guide rails in the elevator shaft. Algorithm and data processing chain are also provided in the paper. The experimental results demonstrate that the system ensure elevator check according to current industry standard.