Design and analysis of fiber Bragg grating sensor to monitor strain and temperature for structural health monitoring

In this paper, we have proposed a Bragg grating based sensor to monitor health of civil structures at distinct temperatures. We have considered increased number of gratings with suitable refractive index to enhance sensitivity of fiber Bragg grating sensor. Analysis of Bragg wavelength with respect to load and temperature is successfully studied. The simulation results reveal that when independently strain (50 units per simulation) and temperature (25 degrees C) are increased uniformly, a linear shift in Bragg wavelength 0.064 and 0.347 nm is observed, respectively. Similarly, when both strain and temperature are increased (epsilon = 50 & T = 25 degrees C) concurrently, a directly proportional relation is found in Bragg wavelength (0.403 nm). The results verify the enhanced performance of as-proposed sensor, employing it could be potentially used in civil, bio-medical and military domains.

Automated summary

This paper proposes a Bragg grating based sensor to monitor the health of civil structures at different temperatures. By increasing the number of gratings and selecting suitable refractive index, the sensitivity of the fiber Bragg grating sensor is enhanced, successfully studying the analysis of Bragg wavelength with respect to load and temperature. Simulation results show a linear shift in Bragg wavelength when independently increasing strain or temperature, as well as a directly proportional relation when increasing both strain and temperature concurrently. The results demonstrate the enhanced performance of the proposed sensor, with potential applications in civil, bio-medical, and military domains.