Spheres to calibrate echo sounders at any frequency
Spheres to calibrate echo sounders at any frequency
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用于校准任何频率的回声测深仪的球体
DOI：
10.2331/suisan.59.933
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
M. Furusawa
中科院分区：
文献类型：
--
作者：
Y. Miyanohana;K. Ishii;M. Furusawa
定量回声测深仪换能器的校准是必不可少的。最近，金属球已被用于校准声学系统。对三种材料的适用性进行了研究，得出以下结论：（1）高碳钢球的硬度和尺寸虽按日本工业标准（JIS）加工，但声学参数的均匀性值得怀疑;（2）铜球适合于在较低频率下的校准，但很难将其用于较高频率;（3）具有6%钴粘合剂的碳化钨是用于所有频率的上级材料。因此，如果能够提供任何精确的尺寸，碳化钨适用于任何频率的校准球。提出了一组直径分别为35.0mm、38.1mm、41.7mm、45.0mm、48.8mm、50.0mm、52.7mm和54.1mm的碳化钨球作为校准球。它们可用于在可能遇到的环境条件下以10 kHz-200 kHz范围内的任何频率工作的回声测深仪。
The calibration of transducers of quantitative echo sounders is indispensable. Recently, metal spheres have been used to calibrate acoustic systems. The suitability of three kinds of material is examined for calibration spheres, and the following conclusions are derived at: (1) although highcarbon steel spheres are machined in accordance with Japanese Industrial Standards (JIS) with regard to hardness and size, the uniformity of the acoustic parameters is rather questionable; (2)copper spheres are good for calibration at lower frequencies, but it is difficult to use them for rather high frequencies; and (3) tungsten carbide with 6% cobalt binder is a superior material for all frequencies. Therefore, if any accurate size can be provided, the tungsten carbide is suitable for calibration spheres at any frequency. A group of tungsten carbide spheres is proposed for calibration spheres, whose diameters are 35.0mm, 38.1mm, 41.7mm, 45.0mm, 48.8mm, 50.0mm, 52.7mm, and 54.1mm. They can be used for echo-sounders operating at any frequency in the range of 10kHz-200kHz in the environmental conditions likely to be encountered.