High tensile wire provided with light guide sensor

US4634217A · kind A · utility

Assignee

• Felten & Guilleaume Energietechnik GmbH · DE

Inventors

• Friedrich K. Levacher · Bad Sobernheim, DE
• Helmut Federmann · Bensberg, DE

Key dates

• Filing date: Feb 15, 1984
• Grant date: Jan 6, 1987
• Expiry date: Feb 15, 2004

Classification

• Technology area (CPC G): Physics
• CPC primary: G08B13/126
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A high tensile wire of a fiber-reinforced synthetic resin encloses an axially arranged light guide in the form of an optical fibers connectable to a light testing instrument. The light guide is enclosed in an intermediate sleeve of a heterogeneous synthetic material which is mechanically firmly connected both to the light guide and to the inner surface of the outer sleeve. In the preferred embodiment, the wire is used as a reinforcing span wire in concrete component parts and the attenuation of the light passing through the light guide indicates tensile strength, bending strength or breakage of the wire in the concrete.