Abstract
This paper presents the investigation prepared in order to verify light guide based optical sensor for force and deformation measurements. Based on the results ob-tained during the whole period of investigation, design of prototype sample for light guide based optical sensor has to be approved, improvements based on the received re-sults included. In order to define design (geometry) a theoretical design model has been created based on Snell’s Law and Total Internal Reflection phenomenon. Based on the out-put from the theoretical investigation, a CAD model has been created. This virtual model of the sensor has been used to perform optical simulations in wide range of light guide deflection angles, to record flux changes with de-creasing the deflection angle from critical (TIR) to 30˚ by 0.5° step. After simulation is completed by reviewing simu-lation results we can confirm that the light guide based optical sensor for force and deflection measurements has linear output flux correlation with changing incidence an-gle in the range of 1˚ - 2˚. For further investigation to confirm correlation between simulation and measurement results the light guide based force and deformation measurement func-tional prototype device has been assembled.DOI: http://dx.doi.org/10.5755/j01.mech.22.4.15414
Highlights
Seamless application of sensors in the manufacturing environment as well as their subsequent integration into cloud computing capabilities is an indistinguishable part of the new cloud manufacturing paradigm [1, 2]
Though most of the sensors or systems mentioned above are in research stage the main option for structure structural health monitoring (SHM) monitoring is to use fiber optics sensors. For this reason it was decided to investigate the possibility to use light guide based optical sensor keeping its application for SHM monitoring in mind
As Snell’s Law enables us to define the device’s light guide geometry, it is necessary to have a starting point that is when the system is in equilibrium, input of light energy into the light guide is equal to the output energy from the light guide
Summary
Seamless application of sensors in the manufacturing environment as well as their subsequent integration into cloud computing capabilities is an indistinguishable part of the new cloud manufacturing paradigm [1, 2]. Though most of the sensors or systems mentioned above are in research stage the main option for structure SHM monitoring is to use fiber optics sensors For this reason it was decided to investigate the possibility to use light guide based optical sensor keeping its application for SHM monitoring in mind. Though the focus here is to see the light guide based optical device for force and deflection forces in the SHM monitoring field, sensor has possible applicability in manufacturing or automotive, where robust, simple and economically viable sensor for force and deflection sensing is needed. Light guide based force and deflection device could be considered as a substitute or enhancement for currently available Fiber Bragg Grating Force sensor used in minimal invasive surgery or any biological applications for force measurements where electromagnetic interference is present for a reliable, simple, accurate force or deflection measurement device. 3) Review simulation results. 4) Based on recommendations from simulation results review prepare light guide based force and deformation device functional prototype sample
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