【作者】 王军；

【导师】 蓝宇； 郭林发；

【作者基本信息】 哈尔滨工程大学 ， 电子与通信工程， 2012， 硕士

【摘要】 随着潜艇隐身技术及海洋勘测技术的发展，水声换能器需要不断向低频、大功率、小尺寸的方向发展。利用谐振腔的Helmholtz谐振是实现换能器低频小尺寸的有效手段。Janus-Helmholtz换能器是一种采用双面振动纵向换能器作为驱动的Helmholtz换能器，其具有结构简单、体积较小、工作频率低等优点。利用经典的等效电路法和有限元法对Janus-Helmholtz换能器进行理论分析，研究结构尺寸对换能器谐振频率的影响，优化结构尺寸。依据优化后的结构尺寸，用等效电路法和有限元法计算出换能器的电导曲线、发射电压响应曲线及声场特性。最后，根据优化后的结构尺寸进行换能器的加工制作，并对换能器的电导和发射电压响应进行测量。实际测得的换能器水中Helmholtz谐振频率为597Hz，Helmholtz谐振频率的发射电压响应为136dB。结果表明，利用Helmholtz原理是实现换能器低频小尺寸的有效方法，测量结果与理论值基本吻合，验证了理论。更多还原

【Abstract】 Along with the progress of submarine mute technology and ocean survey, the demands of underwater acoustic transducers are much higher than before, and which is the reason why low-frequency, high power and small size is an important direction of underwater acoustic transducers. Janus-Helmholtz is composed of Janus transducer and Helmholtz resonance. It’s a low frequency sound transducer that with small size.Equivalent circuit method and finite element method are used to analyze Janus-Helmholtz transducers. Analyze the structure size on resonance frequency influence. Calculate the conductance, emission voltage response and acoustical characteristic of the transducer. Make the structure size optimization. Finally, the prototype is manufactured according to the conclusions of optimization analysis, and the impedance characteristic and transmitting voltage response are measured in the pool.The actual measurement can be used within Helmholtz resonance frequency597Hz with voltage response136dB.The result shows that the designed transducer is achieved with its mission and the experimental results were well coincide with calculated conclusions.更多还原