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本文介绍了对有可能应用于探海底沉积物的参量阵用换能器的结构设计与声场特性的研究。得到了低频(6～8kHz)的参量信号,声波束的水平方向性图的半功率点波束宽度为20°左右,垂直方向性图的半功率点束宽为10°左右。参量阵声纳比通常的线性声纳具有低频、高指向性、宽带和尺寸小、重量轻等优点,而圓弧面换能器在水平方向的参量波束有较小的副瓣,并且便于波束旋转、搜索目标。本文还介绍了圆弧面换能器与发射机间阻抗匹配问题。这些内容对设计实用的圆弧面换能器具有重要的指导意义。
This paper presents a study of the structural design and field characteristics of a parametric array transducer that may be used to probe submarine sediments. The low-frequency (6 ~ 8kHz) parametric signals are obtained. The half-power point beam width of the horizontal beam of the acoustic beam is about 20 ° and the half-power beamwidth of the vertical beam is about 10 °. Parametric array acoustic sonar than the usual linear sonar with low frequency, high directivity, broadband and small size, light weight, etc., while the circular arc transducer in the horizontal direction of the parametric beam has less side lobes, and to facilitate the beam Rotate, search the target. This article also introduces the impedance matching problem between the arc surface transducer and the transmitter. These contents of the practical design of the circular surface transducer has an important guiding significance.