Research on Development of the Rip Current Measuring System by using Acoustic Tomography

声学断层扫描离岸流测量系统的开发研究

• 批准号: 23560972
• 负责人: ISHIDA Hiroshi
• 金额: $ 3.24万
• 依托单位: Oshima National College of Maritime Technology (2013)Kobe University (2011-2012)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560972/
• 关键词: 音響トモグラフィー; 離岸流; 計測装置; 開発研究

Every year, more than 300 swimming people lose their lives in beaches. These casualties are mainly caused by the rip current flowing to offshore. For the continuous observation of the rip current, The aim of this research is to develop the real-time monitoring system of the rip current by using the acoustic tomography.The system consists of one dual-frequency acoustic fish-finder, two broad-band acoustic transducers, a set of sound reflectors and a data acquisition network. The modified dual-frequency acoustic fish-finder alternatively transmit and receive the sound signals of 50kHz at a few seconds interval. The observations were carried out in the Uradome Beach of Tottori Prefecture in September of 2012 and 2013. Based on these observational data, the current velocity fields were well reconstructed and weak offshore currents were detected. In conclusion, it was proved that the developed measurement system have a potential capability of monitoring the rip current.

每年有超过 300 名游泳者在海滩上丧生。这些人员伤亡主要是由流向近海的离岸流造成的。为了实现离岸流的连续观测，本研究的目的是开发利用声学层析成像技术的离岸流实时监测系统。该系统由一台双频声声探鱼器、两台宽带探测器组成。声换能器、一组声音反射器和数据采集网络。改进的双频声学探鱼器以几秒的间隔交替发射和接收50kHz的声音信号。该观测于2012年9月和2013年在鸟取县浦富海滩进行。根据这些观测数据，很好地重建了海流速度场，并检测到了微弱的离岸流。总之，证明所开发的测量系统具有监测裂口电流的潜在能力。

项目成果

離岸流の音響計測システム

裂流声学测量系统

• 发表时间: 2011
• 作者: 中埜岩男・石田廣史

Realization of Acoustic Monitoring of Rip Current based on Passive Reciprocal Sound Transmissions

基于被动互易声传输的离岸流声学监测的实现

• 发表时间: 2013
• 作者: Iwao Nakano;Hiroshi Ishida
• 通讯作者: Hiroshi Ishida

音響反射体を用いた双方向音波伝搬システムによる離岸流観測

使用声学反射器的双向声音传播系统进行裂流观测

• 发表时间: 2012
• 作者: 中埜岩男; 石田廣史
• 通讯作者: 石田廣史

An acoustic monitoring system of the rip current based on passive reciprocal transmissions

基于无源互易传输的离岸流声学监测系统

• 发表时间: 2012
• 作者: Iwao Nakano;Hiroshi Ishida
• 通讯作者: Hiroshi Ishida

Measurement System for Acoustic Monitoring of Rip Current

裂流声学监测测量系统

• 发表时间: 2013
• 作者: Iwao Nakano; Hiroshi Ishida;Ichiro Deguchi
• 通讯作者: Ichiro Deguchi