A HIGH-POWER AND HIGH-EFFICIENCY BENDER TRANSDUCER
Over the past several years,Hangzhou Applied Acoustics Research Institute (HAARI) hasdeveloped the ring transducer,including the air-backed ring transducer(ABRT) and free-flooded ring transducer(FFRT).Previous papers12described a kind of monostatic ABRT with radially poled ceramic and a broadband monostatic segmented FFRT with tangentially poled ceramic.In order to meet the requirements of small-sizedness,high-power,and high-effciency requirements,HAARI conducted in-depth research on bender disk transducers(BDT).The BDT described in this paper was potted in polyurethane,with a mass of 4.3kg in air.Tt has a maxium diameter of 190 mm.Both projector and hydrophone operation are available.The measured maximum transmitting voltage response(TVR) is 139.1 dB//μPa@1m/V,@1.43kHz and the quality factor (Q) is 6.5.The maximum sound pressure level(SPL) is greater than 204.1dB.But in practice the output power of the power-amplifier is small,so the measured SPL is 201.8 dB,and for this measurement was tested at a water depth of 31 m.The acoustic output efficiency at resonance is 93.3% if we assumed the directivity index(DI) is 0.The maximum of the Receiving Voltage Response (RVS) in free field is-156.9dB//V/μPa@1.53kHz.The frequency band with receiving response decreasing 3dB is from 1.4kHz to 1.6kHz.The transducer is robust enough to withstand hydrostatic pressure at 4.5 Mpa.
Underwater acoustic Bender disk transducer Transmitting voltage response level Sound source level
Ji-wu LIU
Hangzhou Applied Acoustics Research Institute, HangZhou, ZheJiang, PRC, 310023
国际会议
石家庄
英文
406-409
2019-11-01（万方平台首次上网日期，不代表论文的发表时间）