An Evaluation Method of Pilot’s Respiratory Status Based on Mask Pressure

The respiratory status of fighter pilot is crucial for flight safety. How to effectively detect the respiratory status of pilots and provide effective protection have been a key research both domestically and internationally in which effective detection of respiratory status is a technical challenge. In this paper, a method is proposed for evaluating pilot respiratory status based on mask pressure. Firstly, by analyzing the mask pressure measured by regulator, the data was divided into several one-min segments and filtered. Then respiratory rate was calculated using frequency analysis method, respiratory depth was calculated using linear normalization and standard deviation method. Furthermore, respiratory depth and respiratory rate were applied to define the tidal volume. Finally, the abnormal probability of respiration can be obtained. Adequate experiments were conducted on the data of fourteen flights of a fighter aircraft. The results indicate that our method can evaluate the respiratory status and obtain the abnormal probability of respiration effectively.