Cognitive load and pressure measurement method and device based on peripheral vessel strain
A technology of peripheral vascular strain and cognitive load, applied in the field of information, can solve problems such as limitations, and achieve real-time measurement, obvious reliability, and obvious individual differences
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[0038] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.
[0039] The sVRI-based cognitive load and stress measurement process of the present invention is as follows: figure 1 As shown, firstly, the PPG signal is collected by the photoelectric sensor; secondly, the digital filtering of the software layer is performed to eliminate the artificial noise and further improve the quality of the PPG signal; again, based on the filtered data, the sVRI feature extraction is performed; Finally, a stable and continuous sVRI output is obtained, which is used to evaluate the user's cognitive load and stress level.
[0040] The sVRI output of the present invention is obtained based on traditional PPG signal processing. figure 2 The basic process of sVRI physiological signal acquisition and processing adopted by the present invention is provided. The signal input of sVRI adopts the original PPG waveform, which is ob...
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