Sensing Probe Development for Pulse Wave and Blood Pressure Detection using Fiber Optic Based Fabry-Perot Interferometer
Bibliographic record
Abstract
A low-cost sensing probe based on fiber optic Fabry-Perot interferometer (FFPI) was designed and developed for pulse wave and blood pressure measurements. The FFPI system was comprised of the light source, sensing probe, and photodetector. To develop the sensing probe, four reflective materials and also three elastic materials were demonstrated to measure the reflectivity and elasticity, respectively. Furthermore, the probe was tested on the fingertip and neck to obtain the interference fringes with five times of repeatability. Besides, the peak detection and fringe counting techniques were employed to demodulate interference fringes into pulse waves. The results revealed that Aluminum-coated mirror provided the highest reflectivity, while a latex rubber balloon, the most elastic material, had a percentage of elongation of 199.25 mm and a Young's modulus of 2.85 MPa. To conclude, the sensing probe had the ability to detect heart pulses, paving the way for an affordable, painless, and user-friendly instrument.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".