Calibration of Quantitative Echo Sounders by Using Echo from Water Tank Surface.
Calibration of Quantitative Echo Sounders by Using Echo from Water Tank Surface.
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利用水箱表面的回波校准定量回声测深仪。
DOI：
10.2331/suisan.63.570
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Kiyotaka Saito
中科院分区：
文献类型：
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作者：
C. Aoyama;E. Hamada;M. Furusawa;Kiyotaka Saito
为了从定量回声测深仪的测量中获得可靠的结果，需要对测深仪进行准确的校准，特别是对于发射和接收系统。为此，我们研究了一种利用实验水箱水面回波进行简单、准确标定的新方法。结果表明，利用水面后向散射强度为0分贝的特性，该方法可以很容易地标定表面散射的等效波束宽度。在尖束的情况下，我们证明了表面散射和体散射的等效波束宽度几乎相同。此外，可以对发射和接收系统进行全面校准，包括等效波束宽度和发射和接收灵敏度，从而产生比单独测量每个因素的方法更可靠的结果。
In order to get reliable results from surveys by quantitative echo sounders, an accurate calibration of the sounder is necessary especially for the transmitting and receiving system. Therefore, we investigated a new method of simple and accurate calibration by utilizing the echoes from the water surface of an experimental water tank. We show that the method can easily calibrate the equivalent beam width of surface scattering by application of the property that the backscattering strength of the surface of water is 0dB. In case of a sharp beam, we show that the equivalent beam widths for surface scattering and volume scattering are nearly the same. Moreover, it is possible to perform an overall calibration of the transmitting and receiving system, including the equivalent beam width and the transmitting and receiving sensitivities, thus producing a more reliable result than the method in which each factor is measured separately.