Detection method of apnea detection system

Abstract

The invention discloses a detection method of an apnea detection system. The detection method comprises the following steps that an electromagnetic wave detection module collects respiratory signals of a person to be detected and sends the respiratory signals to a respiratory detection module; the respiratory detection module analyzes the respiratory signals and judges whether the breath is pausedor not after acquiring the respiratory signals acquired by the electromagnetic wave detection module, and triggers an alarm module to give an alarm when judging that the breath is paused; and the alarm module gives an alarm under the triggering of the respiratory detection module. Electromagnetic waves emitted by the electromagnetic wave detection module can penetrate through a non-metal medium to detect respiratory signals, detection can be conducted without direct contact with a human body, and therefore, the freedom degree of the person to be detected is not limited; and based on time-frequency analysis and spectral analysis technologies, the respiratory signals are subjected to time-frequency analysis, Doppler instantaneous frequency of respiration is estimated and whether the Dopplerinstantaneous frequency of respiration has periodicity or not is judged by utilizing the characteristic that the respiratory signals have periodicity, so that whether respiration exists or not is judged, the computation burden is small, and the detection speed is high.

Description

technical field [0001] The invention relates to the technical field of respiration detection, in particular to a detection method of an apnea detection system. Background technique [0002] During sleep, the complete cessation of oronasal airflow for more than 10 seconds is considered apnea. When sleep apnea occurs, there is less oxygen in the blood and the body is starved of oxygen. If this phenomenon occurs frequently, that is, more than 5 times per hour or more than 30 times of pauses during sleep in 7 hours, if the phenomenon of apnea is not found for many years and is not treated effectively, it will cause serious consequences, and a serious problem may occur. A series of pathological and physiological changes. Therefore, monitoring sleep apnea is essential to pay attention to human health. [0003] PSG and wrist actigraphy are commonly used to monitor sleep. Wrist actigraphy can be connected to any limb, and is based on the same acceleration principle to obtain bod...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing technology for detecting apnea is complex in operation, which limits the freedom of the monitor, and requires analysis based on long-term monitoring data to obtain the detection result, which is not easy for daily family monitoring

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