弯曲振动的偶极子发射换能器高温高电压激励试验OA

The laminated dipole emission transducer with bending vibration for acoustic logging serves as a core component of conventional dipole logging tools.Its radiation performance and stability under high-temperature and high-pressure conditions directly determine the quality of acoustic logging data.To meet the requirements of ultra-deep well exploration,multi-cycle high-temperature(230℃)oil bath testing,combined with high-voltage(1 800 V)excitation,was conducted to monitor the acoustic impedance characteristics of the transducer assembly in real time.Results indicate that transducers fabricated with commercial high-temperature piezoelectric ceramic materials and stringent manufacturing processes exhibit no debonding or fracture throughout four rounds of extreme testing.The resonant frequency shows a low-frequency shift(<5％),while the maximum electrical conductance decreases significantly(85％-95％reduction in X/Y directions).Static capacitance increases reversibly with temperature,and the mechanical quality factor remains stable(<10％fluctuation).Parameter variations are consistent in the X andY directions,with differences within acceptable engineering tolerances.This study provides critical data support for the development of high-temperature acoustic logging tools,dipole remote detection systems,and push-type long-duration operation equipment,while also verifying the reliability limits of materials and processes under extreme 230℃conditions.