Low-Cost Interrogation Technique for Dynamic Measurements with FBG-Based Devices

Sensors

Paulo S. B. André¹  M. Fátima Domingues²  Cátia Leitão²  Paulo F. C. Antunes²  Carlos A. Marques²  Nélia Alberto³  Anselmo Frizera⁴  Camilo A. R. Díaz⁴  Moisés R. N. Ribeiro⁴  Maria José Pontes⁴ 

[1] Department of Electrical and Computer Engineering and Instituto de Telecomunicações, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal;Department of Physics & I3N, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal;Instituto de Telecomunicações, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal;Telecommunications Laboratory LABTEL, Electrical Engineering Department, Federal University of Espírito Santo, 29075-910 Espírito Santo, Brazil;

关键词: interrogation technique;    fiber Bragg grating (FBG);    in-line Fabry–Perot interferometer (FPI);    optical accelerometer;    arterial central pulse waveform;    cardiovascular monitoring;   

DOI  :  10.3390/s17102414

来源: DOAJ

【 摘 要 】

Fiber Bragg gratings are widely used optical fiber sensors for measuring temperature and/or mechanical strain. Nevertheless, the high cost of the interrogation systems is the most important drawback for their large commercial application. In this work, an in-line Fabry–Perot interferometer based edge filter is explored in the interrogation of fiber Bragg grating dynamic measurements up to 5 kHz. Two devices an accelerometer and an arterial pulse wave probe were interrogated with the developed approach and the results were compared with a commercial interrogation monitor. The data obtained with the edge filter are in agreement with the commercial device, with a maximum RMSE of 0.05 being able to meet the requirements of the measurements. Resolutions of 3.6 pm and 2.4 pm were obtained, using the optical accelerometer and the arterial pulse wave probe, respectively.

【 授权许可】

Unknown