High-resolution characterisation of the surface moisture sensor

Hudoklin, Domen (avtor), Cortellessa, Gino (avtor), Begeš, Gaber (avtor), Arpino, Fausto (avtor), Ficco, Giorgio (avtor), Fernicola, Vito (avtor), Beguš, Samo (avtor)

Accurate characterisation of the surface moisture content at sub-millimetre scales is crucial in various industries, particularly in the safety-critical production of electric motors for the automotive industry, in packaging and in electronics manufacturing. Apart from moisture resolution, existing sensors often lack the necessary spatial resolution, making precise control of adhesion quality difficult. To solve this problem, we present a novel experimental setup that generates controlled micrometre-scale moisture gradients in thin polymer samples, enabling high-resolution calibration of surface-sensitive moisture sensors. Since direct measurement of the moisture profile at this scale is difficult, we validated the generated moisture gradients using computational fluid dynamics simulations and confirmed their linearity and stability. We then used this setup to determine the effective detection depth of a previously developed surface moisture sensor based on diffuse reflectance infrared Fourier transform spectroscopy. Our results show that using this experimental setup alone improves the spatial resolution of the sensor by a factor of 14 – from about 0.7 mm to effectively 48 µm. This approach fills a critical gap by providing a practical means of calibrating and characterising moisture sensors that respond to surface moisture gradients, significantly improving quality control in high-precision manufacturing processes

• Jezik: Angleški jezik
• Ključne besede: surface moisture, moisture profiles, moisture sensor detection depth, surface moisture sensor calibration, hygrometry
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FE - Fakulteta za elektrotehniko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Datum objave: 15.01.2026
• Leto izida: 2025
• Št. strani: 11 str.
• Številčenje: Vol. 447, art. 138792
• PID: 20.500.12556/RUL-173982
• UDK: 621.317
• ISSN pri članku: 0925-4005
• DOI: 10.1016/j.snb.2025.138792
• COBISS.SI-ID: 250377475
• Datum objave v RUL: 25.09.2025

Gradivo je del revije

• Naslov: Sensors and actuators : Chemical
• Skrajšan naslov: Sens. actuators, B, Chem.
• Založnik: Elsevier Sequoia
• ISSN: 0925-4005
• COBISS.SI-ID: 361794

Licence

• Licenca: CC BY-NC 4.0, Creative Commons Priznanje avtorstva-Nekomercialno 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc/4.0/deed.sl
• Opis: Licenca Creative Commons, ki prepoveduje komercialno uporabo, vendar uporabniki ne rabijo upravljati materialnih avtorskih pravic na izpeljanih delih z enako licenco.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: površinska vlaga, vlažnostni profili, detekcijska globina senzorja vlage, umerjanje senzorja površinske vlage, higrometrija, CFD

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0225-2020
• Naslov: Metrologija in kakovost

• Financer: EC - European Commission
• Program financ.: EMRP
• Številka projekta: SIB64
• Akronim: METefnet