Patent ID: 9304204
Filing Date: 2016-04-05
CPC Classification: B21C,G01B,G01S

Claim Text:
1. A method of optically internally surveying a seamless pipe manufactured by rolling, or of a pipe welded with a longitudinal seam and manufactured from sheet metal plates shaped to form half shells, from a shaped sheet metal plate, or from a metal strip unwound from a coil, the method comprising the steps of: moving a sensor that emits a laser beam inside the pipe horizontally through the pipe; scanning with the sensor as it moves through the pipe an inner surface of the pipe; determining with a laser tracker positioned stationarily outside the pipe at the end of the travel path the position of the sensor inside the pipe along and transverse to an axis of the pipe and forming a survey of the inner surface of the pipe by combining outputs of the sensor and laser tracker.