SIMULTANEOUS MEASUREMENT OF TEMPERATURE AND STRAIN BASED ON ARC-INDUCED LONG-PERIOD FIBER GRATINGS. A CASE STUDY

摘要

We present a potential sensor head for the simultaneous measurement of temperature and strain based on the concatenation of two long-period fiber gratings arc-induced in different fibers. Despite being the temperature and strain sensitivities of the individual gratings well defined, we demonstrate that the sensor cannot perform the simultaneous measurement of those physical parameters. This fact, results from the uncertainty in finding the determinant of the inverse matrix.