[2] [2] LIU Peng,WANG Weilun,CHEN Ying,et al.Concrete damage diagnosis using electromechanical impedance technique［J］.Construction and Building Materials,2017,136:450-455.

[3] [3] TAWIE R,LEE H K.Monitoring the strength development in concrete by EMI sensing technique［J］.Con-struction and Building Materials,2010,24(9):1746-1753.

[4] [4] CHEN Dongong,HUO Linsheng,SONG Gangbing.EMI based multi-bolt looseness detection using series/parallel multi-sensing technique［J］.Smart Structures and Systems,2020,25(4):423-432.

[5] [5] ANNAMDAS V G,RADHIKA M A.Electromechanical impedance of piezoelectric transducers for monitoring metallic and non-metallic structures:A review of wired,wireless and energy-harvesting methods［J］.Journal of Intelligent Material Systems and Structures,2013,24(9):1021-1042.

[6] [6] BAPTISTA F G,FILHO J V,INMAN D J.Sizing PZT transducers in impedance-based structural health monitoring［J］.IEEE Sensors Journal,2011,11(6):1405-1414.

[7] [7] HIRE J,HOSSEINI S,MORADI F.Optimum PZT Patch size for corrosion detection in reinforced concrete using the electromechanical impedance technique［J］.Sensors,2021,21:3903.

[8] [8] GIURGIUTIU V,ZAGRAI A.Embedded self-sensing piezoelectric active sensors for on-line structural identification［J］.Journal of Vibration and Acoustics,2002,124(1):116-125.

[9] [9] NAIDU A S K.Characterization of the electromechanical admittance signatures of piezo-impedance transducers based on its location［J］.Materials Today:Proceedings,2019,18:4398-4407.

[10] [10] ZAGRAI A N,GIURGIUTIU V.Electro-mechanical impedance method for crack detection in thin plates［J］.Journal of Intelligent Material Systems and Structures,2001,12(10):709-718.

[11] [11] CAMPOS F, CASTRO B, BUDOYA D E, et al. New feature extraction approach insensitive to temperature variations for impedance-based structural health monitoring［J］.IET Science,Measurement & Technology,2019,13(4):536-543.

[12] [12] PEAIRS D M,TARAZAGA P A,INMAN D J.Frequency range selection for impedance-based structural health monitoring［J］.Journal of Vibration and Acoustics,2007,129(6):701-709.