Measuring apparatus for determining the dimension and position of an elongate object
US5088827A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1989 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Dec 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for determining the dimension and position of an elongate object (1) travelling freely in space, for example, a cable being coated in an on-line extrusion process. Two separate out-of-focus images of the object (1) are formed on respective charge coupled devices (5) and (6) positioned on either side of the image plane of the optical system (2, 4) employed. By monitoring variations in the comparative characteristics of the two images caused by object movement and size variation, using conditioning circuits (7) and (8) and an indicator/controller unit (9), the spatial position of the object (1) and its dimensions are determined on a continuous basis whereby it is possible to compensate for inaccuracies in dimensional measurement caused by object movement in space, and to control thereby the extrusion process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.