Structural Health Monitoring of Timber Using Electromechanical Impedance (EMI) Technique

Figure 7

Impedance signatures in different cases from 150 kHz to 300 kHz. (a) Cases 1–5 in Group A; (b) Cases 1–5 in Group B; (c) Cases 1–5 in Group C; (d) Cases 1–5 in Group D; (e) Cases 1–5 in Group E.

(a)

(b)

(c)

(d)

(e)