Abstract
Assessment of biomechanical behavior of human musculoskeletal structure is essential to recognize bone diseases and to design proper medical devices. The skeleton system basically adapts to mechanical loadings. Thus, monitoring the bone deformation under load is of great importance to attain better analysis and interpretation. In recent years, Fiber Bragg Grating sensing devices have been developed and used to monitor strain and temperature of skeleton system. In this work a Fiber Bragg Grating sensor is designed holding a 1.54 pmµε-1 axial strain sensitivity which is almost 30% higher than the one achieved so far. The improvement in sensitivity is achieved by adjusting single-mode optical fiber parameters of the structure.
Highlights
Physical activity appears to play an important role in maximizing bone mass during childhood and the early adult years
In [9] new type of optical fiber strain sensor based on mode field diameter value modulation is presented
The paper focuses on the development of the fiber Bragg Gratings (FBGs) strain sensor in an initial structure prototype for high performance
Summary
Physical activity appears to play an important role in maximizing bone mass during childhood and the early adult years. Studies towards synergizing FBG optical sensing technology with biomechanics and rehabilitation applications are very recent They measure a wide range of parameters, such as strain inside and on the surface of bones, stress in bone cement during polymerization, pressure in orthopedic joints, tension in the intervertebral discs, pressure distribution on the Human machine interface, the dental biomechanics of tendons and ligaments in the angle between the different parts of the body, and many others [3,4,5,6,7]. In [9] new type of optical fiber strain sensor based on mode field diameter value modulation is presented. Any variation in Λ and neff leads to a shift in the λB This principle is widely used in FBG based fiber optic sensors. The simulation results show that the applied strain only caused the reflection response shifted to the higher wavelengths with sensitivity of 1.2pm per micro strain and have no considerable effect on the side lobes and the main lobe kept nearly 100% of reflected light power
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