文档介绍：Fiber Optic Sensors in Smart Structure Application
PHOTONICS, FIBER OPTIC SENSORS
AND THEIR APPLICATION IN SMART STRUCTURES
* and **
* Department of munication Engineering, Indian Institute of Science, Bangalore - 560 012.
** Department of Mechanical Engineering, Hong Kong University, Hong Kong.
Abstract
Photonic sensors, signal processors munication technologies have emerged as viable alternatives to electronics. Fiber optic
sensors which can readily be integrated with smart materials and structures offer an immense potential in the realization of
intelligent systems. This paper presents an overview of different types of fiber optic sensors and their application to smart structures.
1. INTRODUCTION
There has been a growing interest in the area of smart structures which are designed to react to their environment by use of integrated
sensors and actuators in their body. Such structures not only can monitor the health of their body but also forewarn about the onset of
abnormalities in their states and hence the impending failures. There are many advantages in such a system: less down time, less frequent
maintenance, better utilization of material usage and improved safety, reliability and economy.
Several forecasts have predicted that there will be a tremendous growth in the sensors market. In contrast to the classical sensors based
largely upon the measurement of electrical parameters such as variable resistance or capacitance, modern sensors make use of a variety of
novel phenomena. More importantly, these sensors are directly suitable for digital control and also have a degree of smartness
incorporated in them bat problems of nonlinearity and long term drift. Several key technologies are likely to play a major role in
the sensors of the future. Micro electro mechanical (MEM), microelectronic sensors based on piezoelectric materials, organic polymers
and silicon have tremendous potential as