Laser scanning system for measuring shape and dimensions of door frame, uses triangulation measurements to obtain data which is then used to control construction of replacement door

摘要

The system consists of a transmitting assembly, a sensor and a data processor. The transmitting assembly is fixed to one (2) of the door frame uprights and supported by a pillar (6). Two laser beam sources are mounted on a rotating disc. The sensor is positioned sequentially at predetermined positions (A to L) around the frame. Each time a beam is detected, the angular position of the disc is recorded. Triangulation techniques are used to calculate the shape of the frame.