Jichul Park, L. Hwang, Sunmin Byeon, J. Yoo, Yeongho Jeong
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Signal detection circuit of acoustic emission sensor using Pb-free (Na, K)NbO3 system ceramics
In this study, the signal detection circuit of acoustic emission (AE) sensors was presented using Pb-free (Na, K)NbO3 system ceramics with excellent g33(=40.10× 10-3 Vm/N) piezoelectric voltage constant. Signal detection circuit was consisted of the impedance converter, high-pass filter, the signal amplification circuit, and rectifying circuit. The signal converted by impedance converter was amplified by amplifier. Also, the amplified signal was converted and displayed from AC to DC through rectifying circuit.
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