Total Variation Deconvolution of Raman Distributed Temperature Sensing Signals

Abstract

The diffusion of optical fibers has leveraged the development of several researches studies in the field of industrial applications. The sensing element is the fiber itself, and the reading is performed by commercial distributed temperature sensing (DTS) equipament based on Raman scattering. Most commercial DTS equipament has a spatial resolution of one meter, which makes it difficult to employ in small and medium structures or equipment. In addition to the advantage of having reduced dimensions, these sensors are immune to electromagnetic interference (EMI). These characteristics are fundamental for use in electric machines. This paper presents a scheme to reduce the spatial resolution through signal processing without changing the hardware of the equipament, thus aiming at new applications of this technology in small and medium-sized structures.