US 11,933,685 B2
Hazardous location electrical enclosure corrosion monitoring system, assembly and method
Shubham Kumar, Madhya Pradesh (IN); Vikas Pandey, Kharadi Pune (IN); and Graig E. DeCarr, Cicero, NY (US)
Assigned to Eaton Intelligent Power Limited, Dublin (IE)
Filed by Eaton Intelligent Power Limited, Dublin (IE)
Filed on Aug. 20, 2021, as Appl. No. 17/407,659.
Claims priority of provisional application 63/069,359, filed on Aug. 24, 2020.
Prior Publication US 2022/0057279 A1, Feb. 24, 2022
Int. Cl. G01L 1/24 (2006.01); G01K 11/3206 (2021.01); G01M 3/38 (2006.01); G08B 21/18 (2006.01)
CPC G01L 1/246 (2013.01) [G01K 11/3206 (2013.01); G01M 3/38 (2013.01); G08B 21/182 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of monitoring corrosion of an electrical enclosure in a hazardous environment, the method implemented with at least one computing device in communication with at least one Fiber Bragg Grating (FBG) optical sensor reflecting ultraviolet (UV) light in the electrical enclosure, the method comprising:
measuring, by an interrogator mounted inside the electrical enclosure comprising an electrical device, wavelength changes of UV light reflected by the at least one FBG optical sensor mounted inside the electrical enclosure, wherein the wavelength changes are a function of corrosion-related strain in the electrical enclosure;
receiving, by the at least one computing device, the measured wavelength changes from the interrogator;
computing, by the at least one computing device, the corrosion-related strain in the electrical enclosure based on the measured wavelength changes;
comparing, by the at least one computing device, the computed corrosion-related strain with a predetermined threshold; and
recommending preventive corrosion-related maintenance based on the comparison.