Civil Engineering Reference
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sensors for process monitoring and feedback control in microwave-assisted
processing of concrete.
5.3.5 Precision of FBGs
Figures 5.17 and 5.18 compare the temperature measurements recorded
using the FBG sensors to the respective temperatures predicted using
numerical simulation of the microwave heating process. In addition, the
temperature measurements at the locations where the FBGs were mounted,
60
60
FBG2
FBG2
FBG1
FBG1
45
45
30
30
15
15
0
0
0 0 0
120 160
Time (s)
200
240
0 0 0
120 160
Time (s)
200
240
(a)
(b)
Figure 5.17
Temperatures at locations where FBGs are mounted for a saturated con-
crete specimen heated at 950 W for 2 minutes: (a) actual readings of FBGs;
(b) temperatures predicted using numerical simulation.
120
120
FBG2
FBG2
FBG1
90
90
FBG1
60
60
30
30
0
0
0 0 0
120 60
Time (s)
200
240
0 0 0
120 60
Time (s)
200
240
(b)
(a)
Figure 5.18
Temperatures at locations where FBGs are mounted for a saturated surface
dry concrete specimen heated at 1900 W for 2 minutes: (a) actual readings
of FBGs; (b) temperatures predicted using numerical simulation.
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