Title :
Spatial Performance of Acousto-Ultrasonic Fiber Bragg Grating Sensor
Author :
Wild, Graham ; Hinckley, Steven
Author_Institution :
Sch. of Eng., Edith Cowan Univ., Perth, WA, Australia
fDate :
4/1/2010 12:00:00 AM
Abstract :
In this letter, we present results for the spatial performance of a fiber Bragg grating (FBG) sensor to continuous-wave acousto-ultrasonic (AU) signals. The FBG AU sensor is an intensity sensor, using a transmit reflect detection system. The AU sensor was used to receive actively generated continuous-wave ultrasonic signals from a PZT transducer. We present results showing the received signal strength as a function of longitudinal, lateral, and angular separation in small aluminum panels. Measurements were taken for distances of less then 100 mm and at angles from 0 to 90° between the sensor and the transducer. These results show no direct dependence between the received signal strength and the spatial separation, in the range considered. Only variations due to interference were observed.
Keywords :
Bragg gratings; acoustic transducers; fibre optic sensors; piezoelectric transducers; ultrasonic transducers; FBG sensor; PZT transducer; continuous-wave acoustoultrasonic fiber Bragg grating sensor; spatial performance; transmit reflect detection system; Acoustic signal detection; Acoustic transducers; Aluminum; Bragg gratings; Fiber gratings; Gold; Sensor systems; Signal generators; Ultrasonic transducers; Ultrasonic variables measurement; Acousto-ultrasonics; fiber Bragg grating; optical fiber sensing; structural health monitoring;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2009.2038232
