发明名称 |
Coarse flaw detector for printed circuit board inspection |
摘要 |
A system for detecting flaws in printed circuit boards. The circuit board is scanned by a video camera to provide a serial stream of bits each indicative of a picture element within a particular scan line. The serial stream of bits is formulated into binary numbers each representative of a contiguous path of picture elements composed of nxn picture elements. Each of these binary numbers are compared with a corresponding one of a set binary numbers stored in memory representative of a perfect master printed circuit board. Failure of the printed circuit board to match the stored master indicates a flaw. The invention also includes means to generate overlapping patches to insure detection of defects which occur in adjacent patches.
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申请公布号 |
US4707734(A) |
申请公布日期 |
1987.11.17 |
申请号 |
US19850745967 |
申请日期 |
1985.06.17 |
申请人 |
THE PERKIN-ELMER CORPORATION |
发明人 |
LABINGER, RICHARD L.;TINNERINO, NATALE F.;BRYANT, TIMOTHY E. |
分类号 |
G01N21/88;G01B11/24;G01B11/30;G01N21/93;G01N21/956;G06K9/64;G06T7/00;(IPC1-7):H04N7/18 |
主分类号 |
G01N21/88 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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