Reciprocal Sound Transmission Experiment for Current Measurement in the Seto Inland Sea, Japan
Reciprocal Sound Transmission Experiment for Current Measurement in the Seto Inland Sea, Japan
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发表时间：
1997-04
影响因子：
2.3
通讯作者：
Hong Zheng;N. Gohda;H. Noguchi;Toshimichi Ito;H. Yamaoka;T. Tamura;Y. Takasugi;A. Kaneko
中科院分区：
文献类型：
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作者：
Hong Zheng;N. Gohda;H. Noguchi;Toshimichi Ito;H. Yamaoka;T. Tamura;Y. Takasugi;A. Kaneko
设计了一种相互作用的声音传输系统，用于测量船舶交通和捕鱼活动频繁的沿海海域长期的海流。该系统由两个站点组成，间隔5.7公里，位于日本内海的一条海峡两侧。每个站点都配备了发射器、水听器和GPS接收器。利用10阶M序列调制10.6 kHz的载波，成功地完成了两个台站之间的互易声传输实验，时间为5小时。两个台站的时间坐标通过全球定位系统接收的1赫兹和1千赫的时间信号进行同步，精度为0.1微米S。由互反测得的走时数据估算的距离平均流速与声传输线上的ADCP测量结果符合得很好。建议在船舶交通量大、渔业活动频繁的内河海域，采用互易声传播进行测速。
A reciprocal sound transmission system has been designed to measure currents over a long term in the coastal sea with heavy ship traffic and fishing activities. The system was composed of two stations spaced with a distance of 5.7 km on both sides of a channel in the Seto Inland Sea, Japan. Each station was equipped with a transmitter, hydrophone and GPS receiver. Reciprocal sound transmission experiments between the two stations were successfully completed for 5 hours, using a carrier of 10.6 kHz modulated with the M sequence of 10th order. Time coordinates at both the stations was synchronized with the accuracy of 0.1 µs by 1 Hz and 1 kHz time signals received by GPS. Range-averaged current velocities, estimated from travel time data obtained reciprocally, were in good agreement with the results of ADCP measurement obtained along the sound transmission line. It is suggested that reciprocal sound transmission is applicable to velocity measurement in the inland sea with heavy ship traffic and fishing activities.