公开(公告)号：US3886372A

公开(公告)日：1975-05-27

申请号：US44542974

申请日：1974-02-25

Applicant: SAAB SCANIA AB

Inventor： SANGLERT BENKT

IPC: G01B11/02 ,  B27B31/06 ,  G01B11/24

CPC classification number: G01B11/24 ,  B27B31/06

Abstract: An elongated workpiece having unfinished side surfaces inclined laterally downwardly and outwardly from a finished top surface is scanned to produce signals denoting location of the longitudinal edges of the top surface at numerous points along them. An elongated scanning zone, extending across the workpiece, is translated all along the workpiece. In synchronism with scanning zone translation the workpiece is alternately illuminated from opposite sides at a low angle of incidence to the top surface to shadow first one side surface, than the other. Scanning lengthwise along the scanning zone is synchronized with translation of that zone and lighting alternation.

Abstract translation: 扫描具有从完成的顶表面横向向下和向外倾斜的未完成侧表面的细长工件，以产生表示顶部表面的纵向边缘在沿着它们的许多点处的位置的信号。 延伸穿过工件的细长的扫描区域沿着工件被平移。 与扫描区域平移同步，工件以相对于顶面的低入射角从相对侧交替地照射，以使第一个一个侧表面比另一个侧表面受到影响。 沿着扫描区域纵向扫描与该区域的转换和照明交替同步。