| 张富东,周代英,陈敏,肖越.宽带水声参量阵指向性设计与实验验证[J].声学技术,2011,(2):140~143 |
| 宽带水声参量阵指向性设计与实验验证 |
| Directivity design and experimental verification of underwater broadband acoustic parametric array |
| 投稿时间：2010-03-25 修订日期：2010-07-10 |
| DOI： |
| 中文关键词: 宽带水声参量阵 低频声束 旁瓣抑制 |
| 英文关键词: underwater broadband acoustic parametric array audio beam at low frequency suppressing sidelobe |
| 基金项目:国家自然科学基金项目(60901062,60302001) |
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| 中文摘要: |
| 利用宽带水声参量阵可产生高指向性宽带低频声束,推导了宽带水声参量阵生成低频声束的自解调理论模型,对其换能器指向性进行了分析与设计,并研制出了宽带水声参量阵样机。测试结果表明:该样机产成的2 kHz声束的-3 dB指向性锐角约为2.6°,具有很好的指向性,且旁瓣抑制效果好,能够产生无旁瓣的高指向性低频声束。这为解决浅海水声通信的多途干扰、远程水声保密通信等问题提供了一条新思路。 |
| 英文摘要: |
| The underwater broadband acoustic parametric array can produce a broadband audio beam at low frequencies with high directivity.In this paper,its theoretical self-demodulation model of generating an audio beam at low frequency is deduced firstly.Then,the directivity of its transducer is analyzed and designed,and prototype is also fabricated.The experimental result shows that the prototype can generate an audio beam at 2 kHz with excellent directivity performance,whose directivity acute angle at -3 dB is about 2.6°.Moreover,the prototype can produced an audio beam at low frequency without sidelobes due to its excellent performance in suppressing sidelobe,which is significant for solving the problems such as the multipath interference of the shallow-water communication and the long distance underwater secret communication. |
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