Respiration detection method

The invention provides a respiration detection method. Collected flow data is processed, and respiration index points are calculated. The method comprises the steps of circularly judging whether a delay data condition from the current point to a detection point is satisfied or not; judging whether the detection point satisfies a zero-crossing-point condition or not; judging whether the detection point satisfies an inspiration condition or an expiration condition or not; alternately recording inspiration index points and expiration index points. The method is low in complexity and good in performance, can be used for storing the respiration index points in real time, and reduces the burden of operating personnel; the data errors caused by weak respiration fluctuation are effectively prevented; the inspiration condition and the expiration condition are combined for judgment and are mutually constrained, and the inspiration index points and the expiration index points are more precisely calculated. 本发明提供种呼吸检测方法，