Different shapes of sensors were designed according to their geometries of monitored sites. Figure 11 gives 3 kinds of sensors for monitoring hole, lug and surface cracking which were spliced in different sites on the aircraft. Figure 12 are main interrogator and 6 subinterrogators fixed at the different locations. Figures 11 Typical sensors spliced in different sites Figure 12 Main interrogator and 6 subinterrogators fixed at the different locations. 3.2. Working situation of ICM system under operational environment
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