Method and apparatus for using laser light to measure in more than one dimension

摘要

The invention relates to a method for at least partially determining the position of a measuring point in a measuring plane, comprising the following steps: a transmitter designed for generating a beam of laser light rotating at a constant speed in a laser plane is positioned at a distance from a measuring plane; and a receiver designed to generate a signal which is representative of the distance between the laser plane and a first sensor element attached to the receiver is placed at a known position with respect to the measuring point in the measuring plane. The receiver is designed to emit a first measuring signal which is representative of the position of the first sensor element with respect to the laser plane, and is also designed to emit a first angle signal each time the laser light beam impinges on the first sensor element. A synchronization signal source is fitted so as to emit a synchronization signal when the laser light beam passes an angular position. The synchronization signal and the first angle signal are used to calculate the angle enclosed by the line from the centre of the transmitter to the sensor element and the line of the laser beam while the synchronization signal is emitted.