Polymer Optical Fiber-Based Respiratory Sensors: Various Designs and Implementations

Abstract

This research discusses the polymer optical fiber sensor for respiratory measurements. The infrared LED that produces light will propagate along the polymer optical fiber which will be received by the phototransistor and the differential amplifier. The output voltage in the form of an analog signal will be converted to a digital signal by the Arduino Uno microcontroller and displayed on the computer. The polymer optical fiber sensor is installed on the corset using a variety of configuration (straight, sinusoidal, and spiral), placed in the abdomen, and a variety of positions (abdomen, chest, and back) using only a spiral configuration. While doing the inspiration, the stomach will be enlarged so that the optical fiber sensor will have strain. The strain will cause loss of power, the resulting light intensities received by the phototransistor are reduced, and the output voltage on the computer decreases. The result shows that the highest voltage amplitudes were in the spiral configuration placed in the abdominal position for slow respiration measurements with the highest range, sensitivity, and resolution which are 0.119 V, 0.238 V/s, and 0.004 s, respectively. The advantages of our work are emphasized on measurement system simplicity, low cost, easy fabrication, and handy operation and can be connected with the Arduino Uno microcontroller and computer.

A Comprehensive Review on the Optical Micro-Electromechanical Sensors for the Biomedical Application

“…The sensor would measure the strain generated by expansion. Infrared light was passed through the stretchable grating fibre ( 76 ).…”

Terahertz Sensor via Ultralow-Loss Dispersion-Flattened Polymer Optical Fiber: Design and Analysis

“…The characteristics of the wide-spectrum, strong-penetration, high-security terahertz (THz) wave have all-important applications in THz tomography [ 1 , 2 ], detection technology [ 3 , 4 ], biomedical sensing [ 5 , 6 , 7 , 8 , 9 ], THz communication [ 10 , 11 ], polarization maintenance [ 12 , 13 , 14 ], nondestructive testing [ 15 ], and other fields. The THz functional device is based on the waveguide structure and is the premise to realize various application functions.…”