| 摘要 |
<p>The invention provides a method of and apparatus for measuring the true thickness, as well as angles of orientation, of a strip article, e.g. a moving metal sheet emerging from a rolling apparatus. The thickness and angles are measured by three penetrating radiation beams (e.g. X-rays) that cross at a common point of intersection generally, but not necessarily, within the body of the sheet article. One beam is generally normal to the sheet article and the others are oriented in the longitudinal and transverse directions of the sheet article. The angles between the beams are generally fixed and known. The thicknesses measured by the three beams can be used, along with their respective angles of orientation, to calculate the true thickness of the sheet article as well as the angles of sag or off-flatness in the transverse and longitudinal directions at the point of measurement. By measuring these values at various points on the strip article, a thickness and orientation profile of the strip article may be produced.</p> |
