Novel Damage Detection Techniques for Structural Health Monitoring Using a Hybrid Sensor

Table 2

Predicted results for single sensors and hybrid sensors.

Data	Actual crack size	⁢ICM		⁢PZT		⁢Hybrid sensor
		Reported crack size	Relative error	Predicted crack size	Relative error	Predicted crack size	Relative error
I	17.541 mm	19.15 mm	9.17%	16.532 mm	5.75%	17.405 mm	0.78%
II	19.024 mm	20.55 mm	8.02%	16.661 mm	12.42%	17.958 mm	5.6%
III	22.174 mm	24.75 mm	11.62%	18.936 mm	14.6%	20.875 mm	5.86%