Measuring head for inductive measurement of the thickness of an insulating layer on an electric conductor
US4764724A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 28, 1986 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | May 28, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring head has a coil and a contact part for contacting an insulating layer whose thickness is to be measured. The construction and arrangment of the coil are so chosen that in the region of the end face of the contact part, the geometric locations of the points of the conductor which produce an identical change in inductance of the coil lie on concentric circles. The end face of the contact part has a contour which conforms to these concentric circles. Measurement of the thickness of an insulating layer such as a cable sheath thereby becomes independent of the relative position between the measuring head and the material being measured. Accurate guidance of the cable is no longer necessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.