A novel optical fiber acoustic emission (AE) system with multi-sensing function in single
long fiber was developed and utilized for the estimation of AE sources of model steel plate and
jointed pipes. Multi-sensing function was achieved by dividing the single sensing fiber into several
sensor portions with different resonance frequencies. The resonance frequencies were provided by
winding the sensing fiber around the solid rods (sensor holders) with different diameters. The
monitoring system with three sensors in a 10 m long fiber was demonstrated to detect three wave
packets with different frequencies and correctly estimate the source locations of AEs from artificial
(Nelson-Sue) sources on a 0.9 wide x 1.8 m long steel plate. Here the arrival times of AEs for the
source location were determined by the continuous wavelet transform. Source locations on the steel
plate were determined within a distance error of 53 mm. The system also makes the location of the
pipe with damage possible.
Design of Wi-Fi Based Mobile Electrocardiogram Monitoring System on Concerto Platform
