Pressure Membrane FBG Sensor Realized by 3D Technology

Abstract

The publication describes the design, production, and practical verification of an alternative pressure sensor suitable for measuring the pressure of gas, based on a combination of fiber-optic technology and 3D printing methods. The created sensor uses FBG (Fiber Bragg Grating) suitably implemented on a movable membrane. The sensor is equipped with a reference FBG to compensate for the effect of ambient temperature on the pressure measurement. The sensor is characterized by its immunity to EM interference, electrical passivity at the measuring point, small size, and resistance to moisture and corrosion. The FBG pressure sensor has a pressure sensitivity of 9.086 pm/mbar in the range from 0 to 9 mbar with a correlation coefficient of 0.9982. The pressure measurement in the specified range shows an average measurement error of 0.049 mbar and a reproducibility parameter of 0.0269 ± 0.0135 mbar.

Application of Fiber Bragg Gratings as a Sensor of Pulsed Mechanical Action

“…The basic principles of FBG operations are summarized, in particular in the reviews [ 1 , 2 , 3 , 4 , 13 ]; possible applications in [ 1 , 2 , 3 , 4 , 5 , 6 , 8 , 15 , 16 , 17 ]; and manufacturing technology in [ 1 , 2 , 3 , 7 , 11 , 13 , 14 , 15 ]. In particular, the use of FBG in medicine is considered in the reviews [ 4 , 6 , 8 , 11 ]; in biochemistry and pharmacy in [ 4 , 5 , 14 ]; for environmental applications in [ 5 , 11 , 14 ]; as well as for other applications [ 16 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. An overview of works on the properties of chirped FBG and their application is given in [ 27 ].…”

Simple Pressure Sensor with Highly Customizable Sensitivity Based on Fiber Bragg Grating and Pill-Shaped 3D-Printed Structure

“…Fiber Bragg grating (FBG) sensors can be embedded in 3D-printed elements for low cost and customized sensing elements. Some studies used a 3D-printed structure to improve the sensitivity such as the FBG was putted in resin cylinder with a sensitivity of 2.08 nm/MPa [18], and several other FBG pressure sensors embedded in 3D-printed materials have also been proposed [19][20][21][22][23].…”

Study of Intra-Chamber Processes in Solid Rocket Motors by Fiber Optic Sensors

“…Nowadays, many tasks can be solved in science and technics with the help of FOSs. They are useful for measuring deformation [ 9 ], temperature [ 10 , 11 , 12 ], vibration [ 13 ], concentration of substances [ 14 ], rotation speed [ 15 ], refractive index [ 16 ], pressure [ 17 ], liquid level [ 18 ], acceleration [ 19 ], acoustics [ 20 , 21 , 22 ], and other parameters [ 2 , 23 , 24 , 25 ]. Additionally, new types of fiber promise to open new opportunities for such monitoring devices [ 26 , 27 ].…”