Procedure and system for inspecting a component with leads to determine its fitness for assembly
US6222629A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 1999 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Jun 10, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K13/0813
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Procedure and system for inspecting a component (1) with leads to determine its fitness for assembly before the component is placed on a circuit board. In the procedure, a narrow illuminating beam (10) is directed at a light-sensitive detector (11). The component (1) and the illuminating beam (10) are moved in relation to each other so that the position as a function of time is known and that the leads (4) of the component pass through the illuminating beam. The illuminating beam thus reaches the light-sensitive detector when it falls between leads, whereas when it falls on leads, the leads cast a shadow, preventing the beam from reaching the light-sensitive detector. The pulse produced by the light-sensitive detector as a result of the illuminating beam being intercepted by the shadowing effect of the leads is registered. Based on the pulse, the width of the lead row and/or the distance between adjacent lead rows are/is computed. The computed width and/or distance are/is compared with a specified allowed respective limit value. The component is placed on the circuit board if the width and/or the distance between adjacent lead rows computed on the basis of the measurement are/is wi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.