STRIP PROFILE GAUGE

摘要

A profile gauge for measuring the thickness profile of moving steel strip (10) comprises two fixed X-ray sources (11L and 11R) producing corresponding fan-shaped curtains (12L and 12R) of radiation irradiating corresponding halves of the strip. One or more X-ray detectors (13A, 13B) is located on the opposite side of the strip on a reciprocating mechanism such as a belt (14) driven reciprocally by a motor (16). The detectors may be attached to opposite runs of the belt so as to move with contrary motion and may both scan the whole strip width or each scan a corresponding half only. Each detector is preferably a scintillator and photo-multiplier with the scintillator flared out to a collecting aperture elongated in the direction of strip movement.