System for determining the thickness of a rubber layer of a tire
US10876826B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2014 |
| Grant date | Dec 29, 2020 |
| Priority date | — |
| Expiry date | Aug 19, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system is provided for measuring a thickness of rubber layer of a tire. The layer includes a joined face, which is joined to an adjacent metal reinforcement, and a free face in contact with air. The system includes a casing with an application face for contacting the free face, and a sensor positioned in the casing and structured to measure a distance d between the joined face and the free face. The sensor includes a source coil and an adjacent sensing element. The source coil is a source of an alternating magnetic field. The sensing element includes a sensing device configured to produce an output signal that is dependent on an induced local magnetic field. An excitation power and a frequency of the source coil are such that the local magnetic field induced between the reinforcement and the source coil increases in strength as the distance d decreases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.