In order to measure permanently and real-time the temperature inside all kinds of project construction for example airplane wing

the basic principle

structure and characteristics of two kinds of interference optical fiber temperature sensors are introduced

on the base of it

the working principle and structure designing of a new kind of optical fiber temperature sensor—embedded optical-fiber temperature sensor are presented.Optical fiber is embedded into material using special processing technology

interference stripe is produced through phase modulation

then stripe distinguishing direction and counting is used to measure the internal temperature.Experimental results show that the internal temperature of material can be measured by a embedded optical-fiber temperature sensor

and its sensitivity is 2

3

times higher than optical-fiber sensor in air.It has very value of investigating and utilizing.