System for inspecting can lids for through the lid flaws
- 申请公布号：
- US4086497(A)
- 申请号：
- US19760677471
- 申请日期：
- 1976.04.15
- 申请公布日期：
- 1978.04.25
- 申请人：
- COLUMBIA RESEARCH CORPORATION
- 发明人：
- MURRAY, RUSSELL
- 分类号：
- G01M3/38;G01N21/954;(IPC1-7):G01N21/32
- 主分类号：
- G01M3/38
- 摘要：
- A method for detecting light passing flaws in discrete elements, which are normally opaque to visible light, characterized by a sampling technique to enhance the signal to noise ratio of the ultimate signal. The ultimate signal is a composite signal generated by the addition of a number of discrete sample signals, each signal representing both a repeating reaction of a photosensitive means to light passing through flaws in the normally opaque element, and random ambient signal noise.
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