G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 11/06 (2006.01) B21B 38/04 (2006.01) G01B 11/30 (2006.01) G01B 17/02 (2006.01)
Patent
CA 2326269
In a method for contactless online measuring of the wall thickness of hot-rolled pipes in the hot state for determining undesirable inner wall structures, at least one measuring head, operating according to the laser ultrasound method, scans a segment of a wall of a pipe to be measured in a circumferential direction during or directly after a rolling process. The course of the wall of a cross-section of the pipe is then reconstructed with a computer. The measuring head is a compact laser ultrasound measuring head adjustable relative to the pipe dimension to be measured. It has an excitation laser and an illumination laser and optical elements for collecting a carrier light containing the ultrasound signal and reflected at a surface of the pipe. The excitation and illumination lasers and the optical elements are arranged in a common housing of the measuring head. A pivot device is provided to pivot the laser ultrasound measuring head across a segment of the pipe in the circumferential direction.
Riches Mckenzie & Herbert Llp
Sms Demag Ag
Sms Siemag Aktiengesellschaft
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