8th European Workshop On Structural Health Monitoring (EWSHM 2016)
5-8 July 2016, Spain, Bilbao
Right Now in Bilbao 18:09 Wed 19
16:00 Wednesday 6. Jul - A1
Fiber Bragg Grating sensors for the measurement of tendon strain
Abstract »The search of minimally invasive techniques for structural health monitoring of biological tissues is a great challenge that might result in important developments in biomechanics studies and tracking rehabilitation processes. Currently, tissue strain measurements are estimated indirectly using mathematical models that fairly approximate the actual system, but have many limitations. For this reason, Fiber Bragg Gratings sensors (FBGs) are being consolidated as one of the most suitable options for both in vivo and in vitro sensing applications because of their favorable properties like small size, light weight, biocompatibility, chemical inertness, multiplexing capability and immunity to electromagnetic interference. In addition, their ability of assessing several physical parameters simultaneously, such as strain, pressure, displacement and temperature, is of great value in the medical field, significantly reducing the trials duration. FBGs have shown a great potential on measuring both hard tissue, such as bones or intervertebral discs, and soft tissue strain, as tendons, muscles and cartilaginous tissue. Following the latter applications of these optical sensors, this essay aims to characterize the structural properties of the tendinous tissue by obtaining the stress-strain curves and Young modulus of a beef Achilles tendon through tensile tests. With the goal of describing its viscoelastic properties, different velocities were used in the trials. In order to validate the results obtained with the FBGs, an additional image technique was used to measure the tendon extension, i.e. strain, by processing a video recorded during the trials. Our outcomes show that FBGs are an accurate method to directly measure the mechanical and structural properties. This suggests that these optical sensor will be a good approach for modeling physiological systems and for diagnosis of many diseases.
AuthorsGüemes, Amparo*Güemes, Amparo*
A recently BS graduate in Biomedical Engineering from the Polytechnical University of Madrid (UPM), Spain. MS in Biomedical Engineering student at Imperial College London next year. She has been working for three years on Fiber Bragg Grating sensors to assess biological tissues surfaces strain, in collaboration with the Department of Composite Materials at the School of Aeronautical Engineering, UPM.
Polytechnical University of Madrid (UPM)
SpainBernal, PabloBernal, Pablo
A recently BS graduate in Aerospace Engineering from the Polytechnic University of Madrid (UPM), Spain. Collaboration researcher in the Applied Physics Department of the School of Aerospace Engineering, UPM.
Polytechnic University of Madrid (UPM)