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Array geometry calibration for underwater compact arrays

机译：水下紧凑型阵列的阵列几何校准

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摘要

Array geometry calibration is necessary to ensure favorable performance of the array. Traditional techniques for array geometry calibration jointly estimate element positions, instrument delays, and constant sound speed (CSV) via nonlinear iterative method. The drawback is that the calibration results depends on the initial estimations. To improve the robustness and accuracy of the calibration results, a new array geometry calibration method for underwater compact arrays is proposed in this paper. In the new method, the position and instrument delay of each element are jointly estimated based on effective sound velocity (ESV) and time of flight (TOF) and the distances between elements are calculated subsequently, then the relative positions of elements are determined by trilateration. A compact pentagon array with a radius of 130 mm of a USBL positioning system is calibrated in an anechoic tank and a lake trial is conducted to test the performance of the results of array geometry calibration. As expected, the new method outperforms the traditional method, especially in regards to instrument delays and sound velocity estimations. The new method improves the array geometry horizontal precision from 0.6 mm to 0.12 mm and achieves a nearly onefold increase in USBL horizontal positioning accuracy compared to the traditional method. (C) 2018 Elsevier Ltd. All rights reserved.
机译：阵列几何形状校准对于确保阵列的良好性能是必需的。用于阵列几何形状校准的传统技术通过非线性迭代方法共同估算元素位置，仪器延迟和恒定音速（CSV）。缺点是校准结果取决于初始估计。为了提高标定结果的鲁棒性和准确性，提出了一种用于水下紧凑阵列的阵列几何标定新方法。在新方法中，根据有效声速（ESV）和飞行时间（TOF）共同估算每个元素的位置和仪器延迟，然后计算元素之间的距离，然后通过三边测量法确定元素的相对位置。在无回声罐中校准了半径为130 mm的USBL定位系统的紧凑型五边形阵列，并进行了Lake试验以测试阵列几何形状校准结果的性能。不出所料，新方法优于传统方法，特别是在乐器延迟和声速估计方面。与传统方法相比，新方法将阵列几何水平精度从0.6 mm提高到0.12 mm，并使USBL水平定位精度提高了近一倍。 （C）2018 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Applied Acoustics》 |2019年第2期|374-384|共11页
  • 作者

    Sun Dajun; Ding Jie; Zheng Cuie; Huang Weimin;

  • 作者单位

    Harbin Engn Univ, Coll Underwater Acoust Engn, Harbin 150001, Heilongjiang, Peoples R China|Harbin Engn Univ, Acoust Sci & Technol Lab, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Engn Univ, Coll Underwater Acoust Engn, Harbin 150001, Heilongjiang, Peoples R China|Harbin Engn Univ, Acoust Sci & Technol Lab, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Engn Univ, Coll Underwater Acoust Engn, Harbin 150001, Heilongjiang, Peoples R China|Harbin Engn Univ, Acoust Sci & Technol Lab, Harbin 150001, Heilongjiang, Peoples R China;

    Mem Univ Newfoundland, Fac Engn & Appl Sci, St John, NF A1B 3X5, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Array geometry calibration; Compact array; Effective sound velocity; Joint parameter estimation; Underwater;

    机译：阵列几何标定;紧凑阵列;有效声速;联合参数估计;水下;

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