Abstract: Aiming at the differences in personalities and reasonably predicting the air consumption time of air respirator, a method to calculate the air consumption rate of air respirator based on the activity intensity level of personnel with air respirator is proposed. This paper proposes four levels of activity intensity for personnel with air respirator. By collecting data on personal dynamic and static heart rate ratio, air consumption rate of air expiratory and the influencing factors of air expiratory static air consumption rate, the correlation coefficient matrix is used to determine air expiratory air consumption of different activity. The main influencing factor of the rate is used as the independent variable and the gas consumption rate as the dependent variable, and establishes a regression model to calculate the air expiratory gas consumption rate based on the activity intensity. It has been verified that the model has a high degree of fit and has a good effect on predicting the air consumption rate of the air respirator.

Key words: air respirator, air consumption rate, activity intensity;regression models