海中動物の対水速度計測のためのピトー管式小型流速センサの開発

抄録

In this study, we present a waterflow sensor for relative waterflow measurement of marine animals. The biologging method recording animal behavior with sensors has been attracting attention in ecology field. However, there is not a sensor that can measure relative waterflow for long time period due to the stringent requirements for miniaturization and pressure resistance. In addition, marine animals move above the sea surface to breath. Here we proposed digitized compact Pitot-static-tube-based waterflow sensor for biologging of marine animals. Incompressible liquid is sealed inside the sensor to realize high pressure resistance. Silicone rubber is attached on inlets of the sensor to prevent air bubble intrusion. This sensor has a differential pressure (DP) sensor element inside and measure differential pressure between each inlets. By downsizing sensor size and digitizing DP sensor element, the sensor became adaptable to more marine animals. The developed sensor responded differential pressure from 0 to 5 kPa with sufficient sensitivity.