Noise detection method and device

A noise detection and variance technology, applied in the field of signal analysis, can solve problems affecting the accuracy and reliability of the analysis results of human physiological signs, and achieve the effect of improving accuracy and reliability and reducing noise interference
CN109157200BActive Publication Date: 2021-03-23ANHUI HUAMI INFORMATION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
ANHUI HUAMI INFORMATION TECH CO LTD
Publication Date
2021-03-23

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Abstract

The present application provides a noise detection method and device. The method includes: segmenting the collected PPG signal to obtain a plurality of sub-signal segments; extracting the characteristics of each sub-signal segment; The self-similarity of the sub-signal segment on the PPG signal, if the self-similarity is lower than the threshold, it is determined that the sub-signal segment is noise. By dividing the PPG signal into sub-signal segments, using the characteristics of the sub-signal segments to determine the self-similarity of the sub-signal segments, and judging whether the sub-signal segments are noise. Therefore, different types of noise can be detected through the self-similarity of the signal, and noise interference can be reduced. And because the signals generated by the human body in a relatively short period of time have good self-similarity, the obtained effective signals whose self-similarity is higher than the threshold also conform to the actual characteristics of human physiological signs, and can be used to accurately analyze the data of human physiological signs.
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Description

technical field

[0001] The present application relates to the field of signal analysis, in particular to a noise detection method and device. Background technique

[0002] At present, the analysis of human physiological signs through wearable devices for medical health monitoring and diagnosis is becoming more and more widespread. Among them, wearable devices collect PPG signals through PPG (Photo PlethysmoGraphy, photoplethysmography) sensors, and analyze human physiological signs based on the collected PPG signals. Therefore, it can be seen that the quality of PPG signals is the key to the accuracy of the analysis results of human physiological signs. factor. However, due to interference from factors such as the wearer's skin characteristics, contact distance, ambient light conditions, and body movements, noise will be introduced during the PPG signal acquisition process, which will reduce the quality of the PPG signal.

[0003] In related technologies, in order to impro...

Claims

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