Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/71685
Título: | A four-probe salinity sensor optimized for long-term autonomous marine deployments |
Autor(es): | Baptista, J. P. Matos, T. Faria, C.L. Magalhaes, Vitor H. Vieira, E. M. F Martins, Marcos Silva Gonçalves, L. M. Lopes, Sérgio F. Brito, F. B. |
Palavras-chave: | Conductivity Low-Power PSU Salinity |
Data: | Jun-2019 |
Editora: | IEEE |
Revista: | Oceans Conference Record (ieee) |
Resumo(s): | Salinity measurement in water is typically performed with conductivity sensors. However, for long-term marine deployments, loss of precision is observed, mainly due to electrode drift (oxidation and degradation occurs in the presence of water, salts and bio-fouling), which results in inaccuracy of measurements. A cost-effective, low-power, four-probe salinity sensor is presented, to accurately measure long-term deployments in oceans, rivers and lakes. The four-probe methodology overcomes many of the drift problems, and the use of low-cost stainless-steel electrodes (avoiding platinum or titanium materials) can still achieve good long-term stability, in the practical salinity scale range from 2 to 42 PSU. Low-power electronics (200 μA in sleep-mode and 1 mA in active-mode) based on a ratiometric ADC conversion, and a low-power microcontroller with non-volatile memory, complements the proposed sensor, to achieve an autonomous salinity sensor for long-term marine deployments, with autonomy above 1 year with a 1 min -1 sample rate, using a common 2400 mA × 3.7 V lithium battery. |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/71685 |
ISBN: | 9781728114507 |
DOI: | 10.1109/OCEANSE.2019.8867544 |
ISSN: | 0197-7385 |
Versão da editora: | https://ieeexplore.ieee.org/document/8867544 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CMEMS - Artigos em livros de atas/Papers in proceedings |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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JPB Batista et al_Oceans.pdf Acesso restrito! | 2,61 MB | Adobe PDF | Ver/Abrir |