FBG-Based Sensing for Structural Health Monitoring of Road Infrastructure

Table 2

Measured strain (μm/m) by FBG sensor that is embedded 25 mm under FWD when 6 drops by load are performed (with temperature compensation enabled).

No. of FWD drop	Center location of the FWD plate with respect to the FBG sensor (mm)
	0	300	600	900
1	162.5	91.5	24.6	12.5
2	145.9	77.6	27.0	13.1
3	142.7	80.5	24.2	12.2
4	149.5	73.4	28.3	12.1
5	161.6	85.8	25.7	13.2
6	148.5	71.2	25.1	13.2
Average value of measured strain (μm/m)