Unattended Sensors in Marine Environments: Oxybuoy for Hypoxia Study

Unattended Sensors in Marine Environments: Oxybuoy for Hypoxia Study

Rizal Mohd Nor (International Islamic University Malaysia, Malaysia) and Mikhail Nesterenko (Kent State University, USA)
Copyright: © 2016 |Pages: 24
DOI: 10.4018/978-1-4666-9438-5.ch014

Abstract

This chapter discusses the use of unattended sensors and its use in marine environment. The authors present challenges of designing a marine sensor in harsh environments and a case study in implementing a marine sensor to study hypoxia. Hypoxia is a world-wide anthropogenic phenomenon related to pollution. The authors describe the construction of an inexpensive sensor buoy system, Oxybuoy, designed for long-term unattended oxygen sensor measurements. The technology is available to construct such sensor buoys. The authors showed a prototype based on commercial off-the shelf components: an embedded PC, an optical dissolved oxygen sensor, a temperature sensor, a Wi-Fi transmitter and a satellite transmitter. Its total cost is around $5,000 to construct, program and test a proof of concept of such sensor. The authors describe the buoy's architectural design and three experiments that the authors carried out to demonstrate its viability.
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Introduction

Unattended sensors can be divided into several classes based on their size and capabilities. Microsensors are small scale devices with low power requirements, processing, communication and storage capacity. Midsize sensor nodes have a higher power requirement but they have greater communication, storage and processing capabilities. There are a large number of diverse applications, where both microsensors and midsize sensors can be used successfully. In this chapter, the authors describe the most common architecture and applications for microsensors and for midsize sensors. The authors then focus on marine based applications of these sensors.

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