Otimização do processo metodológico para aquisição de imagens termográficas da face.

Abstract

This study aims to optimize the methodological process for the acquisition of facial thermographic images. The methodology used consisted of the acquisition of facial thermographic images in a sample of 10 volunteers (7 women and 3 men), aged between 18 and 34 years (SD = 4.45). Data collection was performed at the Laboratory of Ergonomics and Occupational Safety of the Center of Sciences and Technology of the Federal University of Campina Grande (L.E.E.S.T – UAEM/CCT/UFCG). Thermographic images were obtained by monitoring and controlling variables such as emissivity (human skin Ɛ = 0.98), relative humidity (between 40% and 60%), mean temperature of the study environment at 22.19 ° C (dp = 0.49) for 8 scenarios combining framing (vertical and horizontal), with and without thermal insulation / equalization of the individuals, Apparent Temperature Reflected at a distance of 0.5 m between the thermographic camera and the face of the individual. The Brain Tunnel Temperature (BTT) was used as the reference parameter for comparison. The captured images were analyzed in Flir Tools (v.5.12.17041.2002) and the data analyzed in Excel 2016 software with a 95% confidence interval (p = 0.05). It was observed that the images captured with the vertical framing associated to the thermal insulation showed optimized temperature registers (with increase) when compared to those captured with horizontal framing and without insulation. The Reflected Apparent Temperature exhibited alteration in relation to the presence of the thermal insulation. It can be concluded that the adjustment of the frame, the thermal insulation around the face and the record of the Reflected Apparent Temperature are important for the production of thermograms with optimized temperature registers.