A Multi-position Dynamic Spectral Difference Extraction Method
A dynamic spectrum, multi-position technology, applied in the use of spectrum diagnosis, medical science, diagnosis, etc., to achieve the effect of suppressing random errors
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Embodiment 1
[0036] A multi-position dynamic spectrum extraction method, see Figure 1-Figure 6 , the extraction method includes the following steps:
[0037] 101: Divide a period of the PPG signal into four areas, which are two areas in the upper half and two areas in the lower half;
[0038] Among them, see image 3 , a periodic PPG signal, the PPG signals at all wavelengths in a sample are superimposed as the PPG template signal, and the time difference between two adjacent peaks of the template PPG signal is taken as a cycle.
[0039] see Figure 4 , with the position of the mean value and the minimum value of a pulse wave cycle as the boundary, a cycle of PPG signal is divided into four areas, namely area I, area II, area III, and area IV.
[0040] 102: Perform dynamic spectral extraction independently on the two regions of the upper half and the two regions of the lower half, and perform dynamic spectral extraction on the overall spectrum, and finally superimpose and average these...
Embodiment 2
[0047] Combine below Figure 2-Figure 6 , and the specific calculation formula further introduces the scheme in embodiment 1, see the following description for details:
[0048] 201: Establish a PPG template;
[0049] That is, the logarithmic PPG signals at all wavelengths in a sample are superimposed as the PPG template signal of the sample. By superimposing the PPG signals, part of the high-frequency noise is suppressed, which is conducive to the establishment of the subsequent period and the search for peak and valley values. , PPG template such as image 3 shown.
[0050] 202: Find the peak-valley value of the PPG template, and use the interval between two adjacent peaks of the PPG template as a pulse period;
[0051] 203: Divide the PPG signal of one pulse cycle into 4 regions;
[0052] That is, take the average value in one period as the midline, divide the PPG signal of this period into the upper half and the lower half, and then use the respective average values ...
Embodiment 3
[0071] Below in conjunction with concrete experiment, the scheme in embodiment 1 and 2 is carried out feasibility verification, see the following description for details:
[0072] pass Figure 7 The experimental results show that the multi-position spectrum provided by the embodiment of the present invention can extract more scattering information, which meets various needs in practical applications.
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