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Wireless sensor node for surface seawater density measurements.

Baronti F, Fantechi G, Roncella R, Saletti R - Sensors (Basel) (2012)

Bottom Line: 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 Article: PubMed Central - PubMed

Affiliation: Dipartimento di Ingegneria dell'Informazione: Elettronica, Informatica, Telecomunicazioni, University of Pisa, Pisa, Italy. f.baronti@iet.unipi.it

ABSTRACT
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.

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Related in: MedlinePlus

(a) Photograph of the complete wireless density meter node. Note the sensor rod with the two probes: the surface floating sphere and the tripod weighted float; (b) Density meter electronics consist of the Li-Po battery, the custom wireless board and the MS sensor board, part of the commercial MS liquid level meter customized here.
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f3-sensors-12-02954: (a) Photograph of the complete wireless density meter node. Note the sensor rod with the two probes: the surface floating sphere and the tripod weighted float; (b) Density meter electronics consist of the Li-Po battery, the custom wireless board and the MS sensor board, part of the commercial MS liquid level meter customized here.

Mentions: A proof-of-concept prototype of the wireless density meter node was designed and tested by means of laboratory and at-sea tests. Figure 3(a) shows a photograph of the complete structure, where the sea surface probe (sphere), the weighted float (tripod) and the electronics board of the wireless node are shown. The density meter node is shown disassembled in Figure 3(b). The custom board that provides the MS sensor with the wireless connectivity and the power supply together with the LiPo Battery are visible.


Wireless sensor node for surface seawater density measurements.

Baronti F, Fantechi G, Roncella R, Saletti R - Sensors (Basel) (2012)

(a) Photograph of the complete wireless density meter node. Note the sensor rod with the two probes: the surface floating sphere and the tripod weighted float; (b) Density meter electronics consist of the Li-Po battery, the custom wireless board and the MS sensor board, part of the commercial MS liquid level meter customized here.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3376632&req=5

f3-sensors-12-02954: (a) Photograph of the complete wireless density meter node. Note the sensor rod with the two probes: the surface floating sphere and the tripod weighted float; (b) Density meter electronics consist of the Li-Po battery, the custom wireless board and the MS sensor board, part of the commercial MS liquid level meter customized here.
Mentions: A proof-of-concept prototype of the wireless density meter node was designed and tested by means of laboratory and at-sea tests. Figure 3(a) shows a photograph of the complete structure, where the sea surface probe (sphere), the weighted float (tripod) and the electronics board of the wireless node are shown. The density meter node is shown disassembled in Figure 3(b). The custom board that provides the MS sensor with the wireless connectivity and the power supply together with the LiPo Battery are visible.

Bottom Line: 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 Article: PubMed Central - PubMed

Affiliation: Dipartimento di Ingegneria dell'Informazione: Elettronica, Informatica, Telecomunicazioni, University of Pisa, Pisa, Italy. f.baronti@iet.unipi.it

ABSTRACT
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.

Show MeSH
Related in: MedlinePlus