Abstract
In the current study, we have been developing a wireless sensor network system to support the coral ecological system survey activities for conserving the coral reef environment. In this system, coral images are gathered by stationary underwater monitoring sensor nodes with fixed-point observation. In a long time observation, however, a camera view is interfered because the algae attach to the sensor node surface and grow. Therefore, removing attached algae is important to maintain view ability of camera images. This paper studies attached algae removal function for the sensor node. We investigated attached algae growth in surface of acrylic board which is the exterior material of sensor node, and confirmed that algae growth interfere with the camera view. A prototype of wiper device was developed to wipe and remove attached algae on the surface of sensor node. A wiping action of the wiper device was confirmed in practical environment.
