In our project, it is aimed to measure breathing without contact with the laser speckle method and fiber optic material. The change in the speckle pattern was calculated when the pressure of the breath bends the fiber optic cable and the passing light. In our experiments, a webcam, laser diode, and single-mode fibers are used. The speckle pattern formed by webcam was transferred to a computer by passing a laser beam through the fiber optic cable. It was found that changes in the speckle pattern resulting from the pressure of breathing gases on the fiber optic cable bend the fiber and alter its fiber optic properties. Changes in the speckle pattern were calculated, by contrast, correlation and successive correlation methods. To conduct a controlled experiment our system was tested at the ventilator device in a hospital’s intensive care unit to test air currents similar to breathing and speckle change during breathing of a colleague from the project group was recorded. Frequency, inspiration time, and tidal volume parameters can be measured.
Furthermore, we observed that the pressure formed at different points of fiber creates different speckle patterns, the perception of the region contacted by the fiber was ensured. The cost of the easy-to-install system, consisting of easily available materials, has been calculated as $51,97. The sensitivity of our mechanism may provide early intervention while providing information about irregularities in the breathing of patients in intensive care units of hospitals.