Optimizing copper spheres for precision calibration of hydroacoustic equipment
Optimizing copper spheres for precision calibration of hydroacoustic equipment
复制标题
优化铜球用于水声设备的精密校准
DOI：
10.1121/1.387497
复制
发表时间：
1982
期刊：
影响因子：
--
通讯作者：
K. Foote
中科院分区：
文献类型：
--
作者：
K. Foote
针对有限回波的宽带接收，提出了后向散射截面的运算定义。这是由四个工作频率为38至120千赫的回声测深仪在一组铜球上的相对测量结果所支持的。从经验和理论两方面论证了商用、电工级铜在应用上的优越性。然后提出了确定球尺寸的优化问题，并解决了用所述材料的球校准38 kHz回声测深仪的情况。解决方案：认为铜球直径为60.00 mm，通过多种测量方法进行测试。这些显示精度为0.1 dB。进一步的理论实践表明，铜球在大部分千赫兹频率范围内对各种水声设备进行精确校准是可行的。
An operational definition of backscattering cross section is developed for the wideband reception of finite echoes. This is supported by relative measurements on a set of copper spheres by each of four echo sounders operating at frequencies from 38 to 120 kHz. Experiential and theoretical arguments are advanced for the superiority of commercial, electrical–grade copper in the application. An optimization problem for determining the sphere size is then formulated, and solved for the case of calibration of a 38 kHz echo sounder by a sphere of the described material. The solution: that the copper sphere diameter be 60.00 mm, is tested through a variety of measurements. These demonstrate an accuracy of 0.1 dB. The further exercise of theory indicates the feasibility of precision calibration of diverse hydroacoustic equipment by copper spheres over most of the kilohertz frequency range.