Acoustic Emission Measurement by Fiber Bragg Grating Glued to Cylindrical Sensor Holder

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="274071.fig.0012a" src="https://static.hindawi.com/articles/amse/volume-2014/274071/figures/274071.fig.0012a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Measurements of wide-band piezo-type AE sensor</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="274071.fig.0012b" src="https://static.hindawi.com/articles/amse/volume-2014/274071/figures/274071.fig.0012b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Measurements of C-FBG sensor</td></tr></table></td></tr></table>

<table>Relationship between load and AE event counts by each sensor in 3-point bending test of CFRP laminates. The continuous and broken lines show the load and the cumulative AE event count, respectively. The cumulative events detected by both sensors are similar. The cumulative event count of the PZT sensor (i.e., AE sensor) is higher than that of C-FBG sensor because the sensitivity of the former is higher than that of the latter.</table>

Advances in Materials Science and Engineering

fig12

Figure 12

Figure 12: Acoustic Emission Measurement by Fiber Bragg Grating Glued to Cylindrical Sensor Holder 