음향을 이용한 실시간 유해적조 탐지 시스템

Abstract

The Harmful Algal Blooms (HABs, called red tide) caused by the Cochlodinium polykrikoides has serious impact annually in coastal waters of Korea and its impact is a tendency to increase in the other ocean. As yearly massive damage of the aqua-cultured fishes and ecosystem, more rapidly detecting methods than traditional methods (sampling method) are necessary. Our institute, Korea Institute of Ocean Science & Technology (KIOST), has been developed real-time acoustic detection system, based on the acoustic scattering properties of C. polykrikoides and &#61566 MHz (3.5 and 5.0 MHz) ultrasonic transducer. From several performance tests in the field, we obtained the result that the acoustic system can early detect HABs than traditional counting method using buoy-installed acoustic system. In order to improve convenience in the field, we tried to modify analogue transducer of the system to digital transducer and to reduce whole size of the system.During approximately 2 months in summer seasons, 2014 and 2015, we have been evaluated the performance from the modified system in the laboratory and field conditions. From the evaluation, the system can be successfully detected HABs in the coastal water. In the near future, our institute have a plan to construct widespread acoustic detection network to real-time detect red tide with environmental factors such as temperature, salinity, chlorophyll, and solar heat.ua-cultured fishes and ecosystem, more rapidly detecting methods than traditional methods (sampling method) are necessary. Our institute, Korea Institute of Ocean Science & Technology (KIOST), has been developed real-time acoustic detection system, based on the acoustic scattering properties of C. polykrikoides and &#61566 MHz (3.5 and 5.0 MHz) ultrasonic transducer. From several performance tests in the field, we obtained the result that the acoustic system can early detect HABs than traditional counting method using buoy-installed acoustic system. In order to improve convenience in the field, we tried to modify analogue transducer of the system to digital transducer and to reduce whole size of the system.During approximately 2 months in summer seasons, 2014 and 2015, we have been evaluated the performance from the modified system in the laboratory and field conditions. From the evaluation, the system can be successfully detected HABs in the coastal water. In the near future, our institute have a plan to construct widespread acoustic detection network to real-time detect red tide with environmental factors such as temperature, salinity, chlorophyll, and solar heat.