| 摘要 |
<p>Tomographic imaging of an inanimate object (22) is used for non-contact dimensional and weight measurements during rolling of manufactured articles. A fan-shaped beam of radiation (24) is generated comprising a plurality of fan ray elements (24a, 24n) which are directed through a planar section of the object (22) and detected by a set of detectors (14). Each detector (14) produces a signal representative of the intensity of the radiation of a detected fan ray element (24a, 24n) from which selected coordinates defining a cross-section of the object (22) are determined and displayed. The area of the cross-section is used to determine the weight per unit length of the object (22). The detectors (14) include a scintillation crystal (700) which is provided with a half-solid cylinder of lead (702) disposed on a side of the crystal to minimize measurement of scattered radiation.</p> |
