Method for measuring the thickness of a layer of rubber-like material

US10190863B2 · kind B2 · utility

Assignee

• COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN · FR

Inventors

• Thomas Ledoux · Chamalières, FR
• Denis Martin · Clermont-Ferrand, FR
• Alexandre Pernot · Clermont-Ferrand, FR
• Guillaume Heredia · Clermont-Ferrand, FR
• Patrick Meneroud · La Grange, FR
• Cédric Goeau · Meylan, FR

Key dates

• Filing date: Dec 11, 2015
• Grant date: Jan 29, 2019
• Expiry date: Jan 17, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/123
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method is provided for measuring a thickness of a layer of rubber-like material. The layer of rubber-like material includes a free face in contact with air and a face joined to an adjacent reinforcement made of elements electrically insulated from one another. Each of the elements includes at least one hysteretic material having a magnetic permeability greater than the magnetic permeability of air. According to the method, a sensitive element, which emits an alternating magnetic field, is brought towards the layer of rubber-like material whose thickness is to be measured, hysteretic losses in the adjacent reinforcement are measured at terminals of the sensitive element, and a thickness of the layer of rubber-like material is evaluated based on the hysteretic losses.