Method for processing dynamic spectral data based on single-edge extraction

Abstract

The invention discloses a method for processing dynamic spectral data based on single-edge extraction, and relates to the field of spectral analysis technology. The method comprises the following steps of: acquiring the all-band photoplethysmographic pulse wave; acquiring an all-band photoplethysmographic pulse wave template by using the all-band photoplethysmographic pulse wave and correcting the waveform of the photoplethysmographic pulse wave with each wavelength so as to eliminate the error introduced by the instability of the waveform of the photoplethysmographic pulse wave with each wavelength; removing single-edge dynamic spectrum comprising gross error by using the average effect of single-edge dynamic spectrums corresponding to a front edge and a rear edge of each pulse period according to a 3sigma rule; and superposing the remaining single-edge dynamic spectrums after the removal of the gross error to obtain dynamic spectral output. The method fully utilizes the acquired spectral data, improves the accuracy of the waveform of the photoplethysmographic pulse wave within each wavelength and each period, has higher accuracy, obviously improves the measurement speed, effectively improves the dynamic spectral signal-to-noise ratio and improves the accuracy of dynamic spectral method-based noninvasive blood component detection.

Description

technical field [0001] The invention relates to the technical field of spectrum analysis, in particular to a dynamic spectrum data processing method based on single-edge extraction that can improve the precision and efficiency of dynamic spectrum analysis. Background technique [0002] The principle of dynamic spectroscopy is to irradiate the fingertip with light within a certain wavelength range to obtain a photoplethysmography wave containing information about the pulsating part of the arterial blood. Theoretically, it can be proved that the change of the transmitted light intensity is only related to the filling and contraction of the pulsating part of the arterial blood, while the difference in absorbance of different wavelengths of light will be reflected in the amplitude of the photoplethysmography wave of the corresponding wavelength. Therefore, the dynamic spectrum can eliminate the influence of the stratum corneum, subcutaneous fat, vein and its constant volume (vol...

AI Technical Summary

Problems solved by technology

In the case of long-term measurement, the normal physiological activities of the human body can lead to the instability of the cycle, amplitude and baseline of the pulse wave, so that there are certain differences between the waveforms of each pulse cycle

The frequency domain extraction method is difficult to avoid the influence of these abnormal waveforms and instantaneous interference, and can only evaluate the data quality after all the measurements are completed, which affects the measurement efficiency

Although the existing data quality evaluation standards can find problems in spectral data, they cannot improve the quality of spectral data, and the accuracy of spectral data is also affected by data quality evaluation standards

Images