Abstract:
Pulsed Electro-Acoustic Method is widely used for the
measurement of charge in polymeric insulation. The method is
based upon the generation of acoustic wave proportional to
charge and pulsed electric field. This acoustic wave traverses
several material layers before being sensed and converted to
electrical signal by a piezoelectric transducer. Due to multiple
reflections in its path a direct analysis of travelling acoustic wave
would be complex. We have proposed the modeling of acoustic
circuit of Pulsed Electro-Acoustic method. The acoustic circuit
has been realized using analogy between acoustic wave and wave
propagation in electric transmission line. The piezoelectric
transducer is also modeled as a transmission line as in modified
Leach’s transducer model, except that, in the present case the
transducer absorbs acoustic signal instead of generating.
