Abstract
The singlemode-multimode-singlemode (SMS) fiber structure for a heart rate monitoring is proposed and developed. An artificial electrocardiogram (ECG) signal is used to simulate the heart pulse at different rates ranging from 50 beats per minute (bpm) to 200 bpm. The SMS fiber structure is placed at the center of a loudspeaker and it senses the vibration of the pulse. The vibration of the pulse signal applied to the SMS fiber structure changes the intensity of the optical output power. The proposed sensor shows a linear frequency of the heart rate sensing range that matches well with the relevant heart rate from the artificial ECG. This work shows the capability of the SMS fiber structure monitoring the heart rate frequencies for a long term, high stability realization, and reproducibility, and being suitable for the observation in hospitals as well as in other environments.
Highlights
Heart rate monitoring is one of the key measurements in order to determine the fitness level of a person
It can be observed that the relation has a linear function with a slope R2 of 99.84%, which indicates that the SMS fiber structure can accurately measure the frequency of the heart rate
It has been found that the SMS fiber structure with a length of 10 mm multimode fiber (MMF) is more sensitive than the plastic optical fiber (POF) based on the displacement sensor with a sensitivity about 0.002 mV/μm for heart rates monitoring as demonstrated by Yuwhana et al The main objective of this work is to develop a method of monitoring the heart rate signals by using SMS fiber optic sensors
Summary
Heart rate monitoring is one of the key measurements in order to determine the fitness level of a person. Once the resting body starts to work, the heart rate will increase. The fastest heart rate can occur when the body has a high intensity of work-out. The heart rate is correlated to the cardiovascular outcomes as well as in patients with pulmonary, cerebrovascular, renal diseases, cancer, and erectile dysfunction [1]. The heart rate of adults at normal conditions ranges from 60 beats per minute (bpm) to 100 bpm. Monitoring of heart rate during diathermy conditions is almost impossible due to electromagnetic disturbances from the electrocardiogram (ECG) signal [2]. Other than that, monitoring the heart rate during magnetic resonance imaging (MRI) and X-ray procedures is difficult to be done. The paste and electrodes are common complication that can cause
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