Long base, stretched fiber-optic Bragg network extensometer and production method for same

US6956981B2 · kind B2 · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Véronique Dewynter-Marty · Gif-sur-Yvette, FR
• Stéphane Rougeault · Sceaux, FR
• Pierre Ferdinand · Houilles, FR

Key dates

• Filing date: Apr 4, 2002
• Grant date: Oct 18, 2005
• Expiry date: Oct 2, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L1/246
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An extensometer including a base, a tensioned optical fiber, and a Bragg grating. The extensometer relates particularly to monitoring of structures. Part of the optical fiber containing the Bragg grating is arranged in a tube. This part is tensioned between the two ends of the tube. The ends of this part are fixed to the ends of the tube, and the tube is rigidly fixed to a host material.