Desenvolvimento de um sensor para detecção de queda de pressão em dutos

Abstract

This work presents the development and characterization of a pressure sensor based on Fiber Bragg Gratings (FBG) for leak detection in industrial compressed air systems. The adopted methodology involved the design and fabrication of an FBG sensor coupled to a diaphragm inside a metallic housing, where the optical fiber was fixed to monitor pressure variations through shifts in the reflected wavelength. Simulations and experimental tests were carried out with orifices ranging from 0.3 mm to 0.9 mm, subjected to pressures between 50 kPa and 250 kPa, in 50 kPa increments. The results demonstrated a linear response of the sensor to pressure variations, confirming the sensitivity and efficiency of the device for industrial applications. The repeatability and stability analysis showed a standard deviation of 0,04437 nm, highlighting the reliability of the proposed system. The developed sensor shows potential for continuous monitoring of compressed air networks, contributing to energy waste reduction and optimization of industrial processes.