Next Article in Journal
An Organic/Inorganic Hybrid Membrane as a Solid “Turn-On” Fluorescent Chemosensor for Coenzyme A (CoA), Cysteine (Cys), and Glutathione (GSH) in Aqueous Media
Next Article in Special Issue
Ranging in an Underwater Medium with Multiple Isogradient Sound Speed Profile Layers
Previous Article in Journal
Sensor Integration in a Low Cost Land Mobile Mapping System
Previous Article in Special Issue
Design and Implementation of an Omni-Directional Underwater Acoustic Micro-Modem Based on a Low-Power Micro-Controller Unit
Open AccessArticle

Wireless Sensor Node for Surface Seawater Density Measurements

Dipartimento di Ingegneria dell’Informazione: Elettronica, Informatica, Telecomunicazioni, University of Pisa, Via Caruso 16, Pisa 56122, Italy
*
Author to whom correspondence should be addressed.
Sensors 2012, 12(3), 2954-2968; https://doi.org/10.3390/s120302954
Received: 31 January 2012 / Revised: 9 February 2012 / Accepted: 21 February 2012 / Published: 2 March 2012
(This article belongs to the Special Issue Underwater Sensor Nodes and Underwater Sensor Networks)
An electronic meter to measure surface seawater density is presented. It is based on the measurement of the difference in displacements of a surface level probe and a weighted float, which according to Archimedes’ law depends on the density of the water. The displacements are simultaneously measured using a high-accuracy magnetostrictive sensor, to which a custom electronic board provides a wireless connection and power supply so that it can become part of a wireless sensor network. The electronics are designed so that different kinds of wireless networks can be used, by simply changing the wireless module and the relevant firmware of the microcontroller. Lastly, laboratory and at-sea tests are presented and discussed in order to highlight the functionality and the performance of a prototype of the wireless density meter node in a Bluetooth radio network. The experimental results show a good agreement of the values of the calculated density compared to reference hydrometer readings. View Full-Text
Keywords: wireless sensor network; seawater density measurement; magnetostrictive displacement sensor wireless sensor network; seawater density measurement; magnetostrictive displacement sensor
Show Figures

Graphical abstract

MDPI and ACS Style

Baronti, F.; Fantechi, G.; Roncella, R.; Saletti, R. Wireless Sensor Node for Surface Seawater Density Measurements. Sensors 2012, 12, 2954-2968.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Search more from Scilit
 
Search
Back to TopTop