公开(公告)号：US3872330A

公开(公告)日：1975-03-18

申请号：US40953473

申请日：1973-10-25

Applicant: ROCKWELL INTERNATIONAL CORP

Inventor： MILLER DARROW L ,  WELLS WILLIAM Y

IPC: H04R3/00 ,  B06B1/02 ,  B06B1/06 ,  H01V7/00

CPC classification number: B06B1/0215 ,  B06B1/0611 ,  B06B2201/55

Abstract: A high power acoustic transducer is disclosed, comprised of a number of piezoelectric elements acoustically coupled together. To maximize the available energy in each element, the piezoelectric elements are simultaneously charged by a high voltage source through a high impedance path over a relatively long period. An electrical means is provided for discharging each in succession through a low impedance path. The stored energy is thereby released by each element in a very short time to provide an acoustical pulse of high peak power. Each element is discharged with an electrical phase delay such that the elastic wave of each element adds in phase to the elastic wave of the preceding element, resulting in an amplification of the acoustic wave as it progresses down the transmission path. The entire sequence is repeated at a desired rate to produce an acoustical beam of high-peak power.

Abstract translation: 公开了一种大功率声学换能器，其包括声耦合在一起的多个压电元件。 为了最大化每个元件中的可用能量，压电元件在相对长的时间段内通过高阻抗路径同时由高电压源充电。 提供电气装置，用于连续地通过低阻抗路径放电。 存储的能量由此在非常短的时间内由每个元件释放以提供高峰值功率的声学脉冲。 每个元件以电相位延迟放电，使得每个元件的弹性波相加于前一元件的弹性波，导致当声波向下传播路径时放大声波。 以期望的速率重复整个序列以产生高峰值功率的声束。