Physiological information monitoring method, physiological information monitoring cushion, and mattress
A technology of physiological information and physiological signals, applied in the field of sleep monitoring, can solve the problem that it is not suitable for detecting the sleep status of two people or even many people.
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Embodiment 1
[0068] Embodiment 1: Separate the respiratory signal from the physiological signal, and calculate the respiratory rate of the monitored object according to the respiratory signal.
[0069] First, Fourier transform is performed on the target respiratory signal of the voltage waveform collected by the micro-motion signal sensor. Then, the spectral peaks exceeding the preset energy threshold in the target respiratory signal after Fourier transform are determined, that is, the first few spectral peaks with the largest energy are found.
[0070] After these spectral peaks with higher energy are found, the respiratory frequency corresponding to the spectral peak is calculated as a candidate respiratory frequency. Finally, in combination with the historical data of the monitored object, the most reasonable respiratory frequency is selected from the candidate respiratory frequencies as the output of the monitored object's respiratory frequency.
[0071] In this embodiment, the histor...
Embodiment 2
[0073] Embodiment 2: Separating the cardiac signal from the physiological signal, and determining the heart rate of the monitoring object accordingly:
[0074] First, the baseline drift of the target cardiac signal is removed to obtain a standard cardiac signal. Specifically, a method for removing baseline drift in the time domain may be used to filter low-frequency signals. Of course, other suitable algorithms can also be used to filter the low-frequency signal in the cardiac signal, such as wavelet decomposition method, empirical mode decomposition method (EMD) and so on.
[0075] Then, the peak point and the valley point of the standard cardiac signal are detected. Filter the peak and trough points according to the dynamic threshold to obtain the target peak and trough points. Finally, the distance between the target peak point and the target trough point is determined as the heart rate of the monitored object.
[0076] Since the human cardiac signal collected by the mic...
Embodiment 3
[0077] Embodiment 3: Separating the body motion signal from the physiological signal and calculating the number of body motions.
[0078] Since the micro-motion signal sensor is very sensitive to pressure and vibration signals, when body motion occurs, the voltage waveform output by the micro-motion signal sensor will change abruptly or even saturate. Therefore, in this embodiment, the sudden change and saturation of the voltage waveform are used as the body motion signal.
[0079] The statistics of whether physical movement occurs and the number of physical movements are as follows:
[0080] First, when the waveform amplitude of the voltage waveform repeatedly exceeds the threshold several times, it can be determined that body motion has occurred. The threshold and the number of times it is repeatedly exceeded can be set according to actual conditions, for example, it can be set so that when the waveform amplitude repeatedly exceeds the threshold three times, it is determine...
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