| 摘要 |
Apparatus and method are described for inspecting elongated material such as strands, sheets, bundles or webs for the presence of surface irregularities, count of irregularities within a given length and angle of irregularities such as in the case of crimped fiber. A light source is used to form light areas and shadowed areas of the elongated material. A television camera produces a video signal of the light and shadowed areas and such signal is electronically analyzed with respect to number of alternating light and dark areas within a given length, and the relative widths of such light and dark areas, from which information can be obtained to confirm presence of irregularities, count or frequency, and angle.
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