Quick search Find article
Quick search
Find article

Acoustic emission monitoring of a reinforced concrete structure by applying new fiber-optic sensors

Kazuro Kageyama1,3, Hideaki Murayama1, Isamu Ohsawa1, Makoto Kanai1, Keiichi Nagata1, Yuichi Machijima2 and Fumio Matsumura2

Show affiliations


A novel fiber-optic sensor has been developed based on a newly found principle, the 'Doppler effect in a curved light waveguide'. Excellent performance of the circular loop sensor has been obtained. The circular loop sensor can detect the sum of principal strain rate with extremely high sensitivity and very wide frequency range. The sensitivity of the sensor was experimentally examined and the theoretical value was confirmed. The sensor was applied to damage detection in a reinforced concrete structural model of a railway girder. The protected sensor system was developed in order to improve the survivability during the structural test. In total 25 sensors were applied to the structural model. The developed fiber-optic sensors have shown almost equivalent sensitivity to conventional PZT sensors and much wider frequency range than resonance type PZT sensors. Initiation and propagation of cracks in the reinforced concrete have been analyzed by using the new fiber-optic vibration/acoustic sensing system.


PACS

43.40.Le Techniques for nondestructive evaluation and monitoring, acoustic emission

42.81.Pa Sensors, gyros

07.60.Vg Fiber-optic instruments

06.20.fb Standards and calibration

81.70.Cv Nondestructive testing: ultrasonic testing, photoacoustic testing

Subjects

Instrumentation and measurement

Optics, quantum optics and lasers

Condensed matter: structural, mechanical & thermal

Dates

Issue 3 (June 2005)

Received 2 April 2004, in final form 25 February 2005

Published 26 May 2005



Related review articles

What's this?
View review articles related to this research to gain an insight into the key trends in this subject area. Related review articles are selected based on PACS/MSC codes, and are no more than three years old.

  1. Sonic sands
  2. Spin wave acoustics of antiferromagnetic structures as magnetoacoustic metamaterials

View by subject




Export








Please login to access our web services, or create an account if you don't yet have one.

You must have cookies enabled in your web browser to be able to login.

Username
Password

Forgotten your password? Get a new one here.