Optical Fiber Technology, Journal Year: 2024, Volume and Issue: 89, P. 104046 - 104046
Published: Nov. 26, 2024
Language: Английский
Biomedical Optics Express, Journal Year: 2024, Volume and Issue: 15(7), P. 4132 - 4132
Published: May 21, 2024
Accurate respiratory monitoring is of great significance in assessing and analyzing physical health, preventing diseases. The recently emerged wearable sensors are confronted with the challenges such as complex fabrication processes, limited accuracy, stringent wearing requirements. An optical fiber sensor for accurate human proposed experimentally verified. head composed a piece seven core sandwiched between two single-mode fibers by bitapers, which embedded textile sheet freely worn on upper body. efficient signal demodulation system set up to acquire signal, while Fourier transform (FFT) short-time (STFT) methods used analyze measured signal. Six volunteers invited perform experiment, experimental results demonstrate that can accurately detect distinguish signals under different humans, states (normal, slow, fast), body parts (abdomen, chest, back), postures (standing, sitting, lying), irregular respiration. Pearson correlation coefficient higher than 0.9, consistent commercial sensor. Meanwhile, instability 0.003 Hz same volunteer 6 months. has advantages high sensitivity, good stability comfort, showing potential healthcare applications.
Language: Английский
Citations
4
Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)
Published: Jan. 6, 2025
We developed a deep learning–based extraction of electrocardiographic (ECG) waves from ballistocardiographic (BCG) signals and explored their use in R–R interval (RRI) estimation. Preprocessed BCG reference ECG were inputted into the bidirectional long short-term memory network to train model minimize loss function mean squared error between predicted (pECG) genuine signals. Using dataset acquired with polyvinylidene fluoride sensors different recumbent positions 18 participants, we generated pECG preprocessed using learned evaluated RRI estimation performance by comparing obtained signal leave-one-subject-out cross-validation scheme. A absolute (MAE) 0.034 s was achieved for beat-to-beat accuracy. To further test generalization ability trained short-term-recorded dataset, collected long-term overnight recordings 12 participants performed validation. The correlation 0.82 ± 0.06 an average MAE 0.046 s, showing practical measurement RRIs. These results suggest that proposed approach can be used continuous heart rate monitoring home environment.
Language: Английский
Citations
0
Sensors, Journal Year: 2024, Volume and Issue: 24(7), P. 2285 - 2285
Published: April 3, 2024
Many techniques have been studied for recovering information from shared media such as optical fiber that carries different types of communication, sensing, and data streaming. This article focuses on a simple method retrieving the targeted with least necessary number significant samples when using statistical population sampling. Here, focus is denoising detection Bragg grating (FBG) power spectra. The impact two-sided one-sided sliding window technique investigated. size varied up to one-half symmetrical FBG spectra bandwidth. Both, two- small sampling were experimentally We found shorter delivered less processing latency, which would benefit real-time applications. calculated thresholds used in-depth analysis we obtained. It was normality three-sigma rule does not need be followed used. Experimental demonstrations analyses also showed novel threshold do depend prior knowledge probability distribution functions describe peaks background noise. demonstrated thresholds’ adaptability strongly depends mean standard deviation values
Language: Английский
Citations
3
IEEE Sensors Journal, Journal Year: 2024, Volume and Issue: 24(15), P. 23909 - 23917
Published: Aug. 1, 2024
Language: Английский
Citations
2
IEEE Sensors Journal, Journal Year: 2024, Volume and Issue: 24(20), P. 32140 - 32149
Published: Aug. 8, 2024
Language: Английский
Citations
1
International Journal of Computing and Digital Systems, Journal Year: 2024, Volume and Issue: 15(1), P. 1135 - 1147
Published: March 1, 2024
The use of smart healthcare systems to monitor cardiac parameters has gained widespread popularity globally due advancements in technology.The Internet Medical Things (IoMT) become an integral part modern by facilitating the efficient monitoring vital signs through advanced sensors.Heart Rate variability (HRV) characteristics, which provide valuable insights into a patient's health, have indispensable applications.Fiber Bragg Grating (FBG) based optical sensors emerged as cutting-edge technology for continuous several among new alternatives.Recent technical advances improved accuracy these sensors, allowing early identification and prognosis heart illnesses, potentially saving lives.This article delves design, construction, structural analysis passive FBG sensor capable real-time acquisition HRV such standard Deviation Normal-to-Normal (SDNN), Root Mean Square Successive Differences (RMSSD), Percentage intervals (PNN50) differing more than 50 ms, along with Heart (HR).It also provides enhanced signal processing methods well IoT-based architectural architecture.Experimental research laboratory including five participants (three males two females) revealed good performance, error rate less 10 percent when compared typical HR monitor.This intelligent detects arrhythmia, coronary disease, aortic disorders, strokes high accuracy, providing substantial contribution healthcare.The combination Fiber (IoT) architecture, enormous potential improving patient outcomes.
Language: Английский
Citations
0
Published: March 4, 2024
Statistical denoising techniques have been well studied, however many challenges still remain. This 9 article focuses on determining the least necessary number of significant samples in a statistical pop-10 ulation sampling, while minimizing impact detection fiber Bragg grating 11 (FBG) power spectra. is achieved by using Bayesian decision making, small population statis-12 tics excluding false detection. First, we investigate two-sided sliding window 13 technique applied near cell under test. The size varies from 8 to 60 samples. 14 considered maximum sampling connected with wavelength 15 within bandwidth symmetrical FBG spectra peaks. Regarding sym-16 metry peaks and possible reduction computational demands, inves-17 tigate one-sided window. enables achieve less processing latency for 18 real time applications thus brings benefits FBG-based optical sensing. Both, two- one-19 sided are then experimentally verified. Detection results 20 analyzed depth via calculating thresholds along-21 side waveband. From achieved, it was found that normality three-sigma rule does 22 not need be followed sampling. Experimental demonstrations 23 analyses showed proposed concept threshold 24 based depend prior knowledge probability distribution 25 functions level background noise. We also 26 thresholds’ adaptability mainly depends numerical characteristics above ad-27 ditive mixture signals
Language: Английский
Citations
0
Optics & Laser Technology, Journal Year: 2024, Volume and Issue: 180, P. 111552 - 111552
Published: Aug. 11, 2024
Language: Английский
Citations
0
EPJ Web of Conferences, Journal Year: 2024, Volume and Issue: 305, P. 00019 - 00019
Published: Jan. 1, 2024
Optical fiber sensors have been validated for physiological measurement as a potential device smart textiles and wearable sensors. Also, developing with Polymeric Fiber (POF) shows promising applications in dynamic real scenarios, low-cost alternatives. Furthermore, the functioning of POF can be used no-skin contact applications, such highly skin-sensitive children Autism Spectrum Disorder (ASD) during therapies. On other hand, Dog-Assisted Therapy (DAT) is stress-reducing method has studied to identify its influence on improving therapies stress-related events. This work presents case study three weekly DAT sessions focused speech therapy subject ASD. A sensor was this first scenario. The analysis five Heart Rate Variability (HRV) variables made compare participant’s status before DAT. obtained pulse signal showed movements affecting but being able obtain peaks. comparison difference mean peakto-peak time interval when child interacting dog than previous interaction Session 1 2 (p-value<0.05). an improvement phonological consciousness obtained, increasing by eight points after weeks therapy. use environments, or
Language: Английский
Citations
0
Optical Fiber Technology, Journal Year: 2024, Volume and Issue: 89, P. 104046 - 104046
Published: Nov. 26, 2024
Language: Английский
Citations
0