发明授权
US5023916A Method for inspecting the leads of electrical components on surface
mount printed circuit boards
失效
用于检查表面贴装印刷电路板上电气元件引线的方法
- 专利标题: Method for inspecting the leads of electrical components on surface mount printed circuit boards
- 专利标题(中): 用于检查表面贴装印刷电路板上电气元件引线的方法
-
申请号: US399688申请日: 1989-08-28
-
公开(公告)号: US5023916A公开(公告)日: 1991-06-11
- 发明人: Heinz Breu
- 申请人: Heinz Breu
- 申请人地址: CA Palo Alto
- 专利权人: Hewlett-Packard Company
- 当前专利权人: Hewlett-Packard Company
- 当前专利权人地址: CA Palo Alto
- 主分类号: G01R31/04
- IPC分类号: G01R31/04 ; B23K31/12 ; G01N21/956 ; G06T1/00 ; G06T7/00 ; H05K3/34 ; H05K13/08
摘要:
A method of inspecting solder joints that connect surface-mount electronic components to printed circuit boards is provided. Preferably, the method includes the steps of obtaining an image of a plurality of the leads of the electronic component, for each obtained image, representing segments of the image that correspond to each of the leads by polygons, projecting pixel intensity values within each polygon each onto an axial dimension to provide a measured waveform, comparing the measured waveform for each lead with a corresponding model waveform, and, classifying each lead as being either satisfactory or unsatisfactory on the basis of said comparisons.
公开/授权文献
- US5581888A Lubricated blade pivot for folding knives 公开/授权日:1996-12-10