Testování nového typu senzoru na bázi Braggovské mřížky (FBG) a konvenční kyslíkové masky pro biomedicínské aplikace

Abstract

This master's thesis focuses on a comprehensive testing and analysis of an optical sensor with a Fiber Bragg Grating (FBG). The sensor was assigned to me by the thesis supervisor and is used for monitoring human body respiratory rate. The introduction of the thesis is dedicated to the theoretical part, which covers optical fibers, their applications in sensing, and the description of the Bragg Grating. Following the theoretical part, there is a practical section that focuses on the measurement method design, establishment of the workplace, and processing of the acquired data. The comprehensive measurement is based on long-term and short-term sequences, with a total of 15 subjects (volunteers) participating in the tests. The statistical analysis is based on comparing the measured data from the FBG sensor with the data from a conventional pneumatic belt, which serves as a reference. The data processing was performed using the Matlab programming environment, where a custom signal processing script and data analysis were developed. For statistical evaluation, the medically objective Bland-Altman method was utilized. The average agreement of the measured results using the Bland-Altman method exceeded 95\%. Based on the obtained results, it can be concluded that the proposed measurement method using the FBG sensor was thoroughly tested and validated. However, for practical implementation in clinical practice, further comprehensive follow-up research is desirable, which goes beyond the scope and was not part of this master's thesis.