摘要:
提出将MEMS矢量水听器应用于潜标系统,并进行了大量实验验证其可行性。MEMS矢量水听器是一种新型水下声学传感器,它具有体积小、成本低、一致性高和高灵敏度等优点。将水听器应用于潜标系统,可以大幅降低阵列孔径,进而有效地监测海洋声场的矢量信息。矢量水听器矢量通道的指向性与频率无关,在低频和甚低频同样可以获得良好的空间增益,应用在低频和甚低频领域中,可以有效地解决声纳设备体积庞大的问题。经过对系统样机进行多次室内驻波桶调试和外场湖试与海试,结果表明,该系统能有效检测海底20~1000 Hz范围内的声场矢量信号,水听器此时的灵敏度可达-176 dB,且具有良好的8字型指向性。实验结果证明了MEMS矢量水听器应用在潜标系统中进行海洋声场矢量信息探测的可行性,为MEMS 矢量水听器在水下目标探测领域的研究提供了良好的试验平台,并为其工程化应用奠定了基础。
关键词:
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MEMS /
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水听器 /
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潜标 /
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数据采集
Abstract:
In this paper, MEMS vector hydrophone is proposed to apply in submerged buoy system, and a large number of experiments are done to verify its feasibility. The MEMS vector hydrophone, a kind of underwater acoustic sensor, has lots of advantages, such as small size, low cost, better consistency and high sensitivity. When applied in submerged buoy system, it can sharply reduce the array aperture and can effectively detect the vector information of the marine sound field. Mainly, it can obtain good spatial gain and solve the problem of bulky volume of sonar equipment when applied in the field of low and very low frequency. The prototype of the submerged buoy system has undergone a number of indoor debugging and outdoor tests. After the preliminary treatment of the trial data, the results show that this system can effectively detect the acoustic field vector signal in range of 20-1000 kHz under ocean. The MEMS vector hydrophone sensitivity can reach －176 dB and has a good 8 shaped directivity pattern.
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