Ruiya Li
Wuhan University of Technology, China
Title: Fiber Bragg Grating (FBG) sensing technology and its application in thermal errors monitoring of CNC machine tools
Biography
Biography: Ruiya Li
Abstract
For a long time, fiber Bragg grating (FBG) based sensors were intensively studied for application in civil engineering structure, like bridges, dams, etc. Recently, due to the advantages of small volume, light weight, anti-electromagnetic interference, anti-oil corrosion, and multiple measuring points in one optical fiber, FBG-based sensors have attracted lots of interests and been widely investigated by researchers and engineers in industrial filed. Our research focuses on dynamical monitoring and diagnoses of mechanical systems based on distributed fiber Bragg grating sensors. The FBG-based sensors we developed for mechanical equipment (large steam turbine, aeroengine, large crane, heavy-duty CNC (computer numerical control) machine tools, etc.) involves the measurement of temperature, strain, force, pressure, and accelerator. Thermal error monitoring technology is the key technological support to solve the thermal error problem of heavy-duty CNC machine tools. FBG temperature sensors were utilized to detect the temperature field of main heat sources and the body structure in heavy-duty CNC machine tools to study the thermal characteristics of main heat sources and to establish the thermal error prediction model. Meanwhile, based on the advantage of multiple strain measuring points in one optical fiber, FBG-based strain sensors were studied and used to measure the thermal deformation of structural components (gantry beam, column and base) of the heavy-duty CNC machine tools using the integral relationship between the strain and deformation.