06854327 is referenced by 22 patents and cites 15 patents.

An apparatus and method for continuous, passive detection and measurement of tensile and compressional strain in a structure utilizing a shielded optic fiber, the optic fiber having one or more Bragg gratings thereon, the gratings and shield being disposed in a curved path on the structure and a baseline response for the grating is made using an optical source and detector. Changes in tensile or compressional forces on the structure will result in changes in the curve of the grating, resulting in a frequency shift for the returned light.

Title
Apparatus and method for monitoring compaction
Application Number
10/288920
Publication Number
6854327 (B2)
Application Date
November 6, 2002
Publication Date
February 15, 2005
Inventor
David Ralph Stewart
Richmond
TX, US
Dennis Edward Dria
Houston
TX, US
Frederick Henry Kreisler Rambow
Houston
TX, US
Assignee
Shell Oil Company
TX, US
IPC
G01F 003/14
View Original Source