Design of a piezoelectric transducer cylindrical phase modulator for simulating acoustic emission signals

Abstract

To conveniently carry out the pipeline leak experiment in a laboratory, leak acoustic signals are simulated by using the converse piezoelectric effect of a piezoelectric transducer (PZT) cylindrical phase modulator. On the basis of the piezoelectric equations and electromechanical equivalence principle, the transfer function of a PZT cylindrical phase modulator is delivered. A PZT cylindrical phase modulator is designed, and the numerical simulation is conducted. Results prove that the PZT cylindrical phase modulator can effectively simulate leak acoustic emission signals when the frequency is lower than 25 KHz.

Influence of polarization controller on the measurement of the precision position of the leakage using optical fiber sensors

“…According to this, we set up an experimental system. The PZT columnar phase-modulation was used to simulate the leakage signal [6] . The length of fibre loop was 10.044km.…”