Method and apparatus for inspecting engine head valve retainer assemblies for missing keys
US4399554A · kind A · utility
38Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1980 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Aug 21, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30164
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer vision system for inspecting engine heads during assembly for missing valve spring assembly keys comprises a solid-state camera for taking pictures of the valve spring assemblies and providing picture data upon command to a computer. The computer responds to a position encoder which relates the position of the engine head to the camera. Once the data is stored in the computer, it is analyzed to determine the center of the digitized image of the valve spring assembly and an intensity profile at the expected location of the keys relative to the center of the assembly is utilized to determine whether a key is missing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.