Consiglio Nazionale delle Ricerche

Tipo di prodottoContributo in atti di convegno
TitoloDesign and field testing of a fiber optic pressure sensor for underground water level monitoring
Anno di pubblicazione2019
Autore/iLuca Schenato; Juan Pablo Aguilar López; Andrea Galtarossa; Alessandro Pasuto; Thom Bogaard; Luca Palmieri
Affiliazioni autoriConsiglio Nazionale delle Ricerche (Italy) Delft Univ. of Technology (Netherlands) Univ. degli Studi di Padova (Italy) Consiglio Nazionale delle Ricerche (Italy) Delft Univ. of Technology (Netherlands) Univ. degli Studi di Padova (Italy)
Autori CNR e affiliazioni
  • inglese
AbstractWe present the design and field test of a rugged FBG sensor prototype for high-sensitivity measurement of underground water level. Pressure sensors have many fields of application, ranging from environmental monitoring to the oil and gas industry. In particular, pressure sensors can be used to monitor the stability of dikes and embankments by measuring the inner phreatic level at their foot to detect anomalous filtration and excess of pore pressures. For this application, rather high sensitivity at an affordable cost is required. Fiber optic pressure sensors have been explored with different solutions, but the technologies proposed so far have either small sensitivity, and hence are befitted for large pressure ranges, or are based on interferometry, and hence require rather expensive laser sources. The sensor described in this paper exploits a 3D-printed mechanical transducer to convert external pressure in longitudinal strain along the fiber. A second FBG, embedded in the sensor, is used to compensate for temperature cross-sensitivity. The structure is enclosed in an aluminum alloy case to withstand harsh environments and installation procedures. Pressure and temperature sensitivities of the sensor are about 20 pm/cm H2O and 17 pm/°C respectively. Three sensors of this kind have been successfully tested in a large scale dike at the Flood Proof Holland facility, in Delft, Netherlands.
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RivistaProceedings of SPIE
Attiva dal 1990
Editore: SPIE, The International Society for Optical Engineering - Bellingham, WA
Lingua: inglese
ISSN: 1996-756X
Titolo chiave: Proceedings of SPIE
Titolo proprio: Proceedings of SPIE.
Titolo abbreviato: Proc. SPIE
Titolo alternativo: Proceedings of The International Society for Optical Engineering
Numero volume della rivista11199
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Verificato da refereeSì: Internazionale
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)
  • Scopus (Codice:2-s2.0-85073393187)
Parole chiavefiber optic sensor, pressure, groundwater level variations, Bragg gratings, 3D printing
Link (URL, URI)
Titolo convegno/congressoSeventh European Workshop on Optical Fibre Sensors
Luogo convegno/congressoLimassol, Cyprus
Data/e convegno/congresso01-04/10/2019
Titolo parallelo-
Note/Altre informazioni-
Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
Moduli/Attività/Sottoprogetti CNR
  • DTA.AD003.215.001 : DOMINO - Dikes and debris Flows Monitoring by novel Optical fiber Sensors ERANET
Progetti Europei-
Paper (documento privato )
Tipo documento: application/pdf