Patent · US Active

POF strain sensor using phase measurement techniques

US8346032B2 · kind B2 · utility

2Cited by

5References

37Claims

0Family size

Assignee

Avago Technologies Fiber IP (Singapore) Pte. Ltd. · SG

Inventors

Harry Schilling · Eichstätt, DE
Hans Poisel · Leinburg, DE
Olaf Ziemann · Berlin, DE
Michael Luber · Bad Mergentheim, DE
Sven Loquai · Feldkirchen-Westerham, DE

Key dates

Filing date	Mar 17, 2010
Grant date	Jan 1, 2013
Priority date	—
Expiry date	Mar 17, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG01M11/086
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An optical fiber sensor has a measurement path and a reference path. Both paths each consist of two optical fibers and are fed with modulated light. The fibers of the reference path have a predefined difference in length, whereas the fibers of the measurement path are the same length. All fibers are at approximately the same temperature. An evaluation circuit determines the phase differences in each case between the fibers of the measurement path and of the reference path. A measurement value calculated from the phase differences is then output.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.