摘要
多波束图像声纳广泛应用于水下工程实施、浅海地貌测绘、蛙人和水雷等水下小目标的探测识别,高频弧形换能器是多波束图像声纳的重要组成部分,用于发射高频宽波束声波。通过理论公式计算了宽波束高频弧形换能器的指向性图,分析了指向性特征：主波束内存在连续的震荡起伏,震荡幅度由中心向两侧逐渐增大,在波束边缘处出现最大值,波束中心幅值比最大值减小1~2 dB左右。采用1-3型压电复合材料,研制了一款宽波束发射的高频弧形换能器,换能器谐振频率为440kHz,最大发送电压响应为162dB,5dB水平开角为107o,3dB垂直开角为26o,可应用于多波束图像声纳。
The high frequency underwater curved transducer array mainly applied in multi-beam image sonar as a wide beamwidth project.By using theoretical formula,the directivity of the high frequency curved transducer array is calculated and the directional characteristics analyzed.A high frequency underwater curved transducer array has been developed,which has a large central angle in the horizontal direction.The curved array is made of 1-3 type of piezo-composite material.Its transmitting voltage response is 162dB,resonance frequency 440 kHz,and the horizontal and vertical beamwidths are 107o（？5dB） and 26o（？3dB） respectively.
出处
《声学技术》
CSCD
2012年第6期628-630,共3页
Technical Acoustics
