Industrial system for inspecting and identifying workpieces
US4072928A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 1975 |
| Grant date | Feb 7, 1978 |
| Priority date | — |
| Expiry date | Oct 10, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V2201/06
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a system for inspecting and identifying workpieces in an industrial environment. Workpieces such as metal parts with markings that are punch-stamped or engraved are successively registered with a device which derives an electrical signal corresponding to each marking. The markings can be serial numbers or any other markings of arbitrary shape. Each electrical signal is extensively modified to minimize the effect of irrelevant and confusing characteristics such as the surface roughness of the workpiece, rust spots, depth of the stamping or engraving, and the like, and to make the electrical signal more representative of the important characteristics of the marking, such as the overall shape of the marking and the differences of the marking from other markings which have different meanings. The resulting modified electrical signal is combined with prototype electrical signals to find out which of the prototype signals most closely corresonds to the modified electrical signal, and to thereby identify the marking from which the modified electrical signal is derived. The prototype electrical signals are generated through training the system by exposing it to sample markings…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.