Wearable Bio-Sensor Datum Rebuilding for Motion Noise

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Solution Overview

Problem

Wearable electronic devices with bio-sensor modules face issues with unreliable photoplethysmography data due to the module shifting from the user's skin during exercise, leading to incorrect sensing results and noisy statistics.

Innovation Solution

A datum rebuilding method that continuously receives physical signals, identifies specific signals meeting predefined conditions, and outputs a warning signal to remind the user, using stored past statistic curves to rebuild a smooth and reliable statistic curve by filtering out noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the bio-sensor module is used to sense biometric features in real-time, then the user can obtain photoplethysmography data for visual observation, but the data becomes unreliable when the module shifts from the skin during exercise

Engineering Contradiction:
Improvereliability of photoplethysmography dataVSAvoidstability of bio-sensor module on skin
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The system performs preliminary actions by continuously monitoring signal quality indicators and detecting potential noise conditions before they severely degrade the photoplethysmography data. The algorithm proactively identifies when the bio-sensor module may be shifting or separating from the skin, and takes corrective measures by filtering or amending the data before the unreliability becomes critical, thus maintaining data quality despite motion during exercise.

Inventive Principle:
Principle #10Preliminary action

2Productivity

If conventional algorithms are used to analyze sensing results, then real-time photoplethysmography data can be displayed, but unexpected peaks or drops appear in the data when the sensor separates from the skin

Engineering Contradiction:
Improvereal-time data processing speedVSAvoidaccuracy of sensing results
Core Design Contradiction:
ProductivityVSMeasurement precision

Solution Approach 1:

The algorithm implements a feedback mechanism that continuously monitors the quality of sensed photoplethysmography data by analyzing signal characteristics. When unexpected peaks or drops are detected that indicate sensor-skin separation, the system provides feedback to the data processing pipeline, triggering filtering or amendment operations. This feedback loop enables the system to maintain measurement precision by correcting errors while preserving real-time processing capability, as the corrections are applied automatically based on detected conditions rather than requiring manual intervention or complex reprocessing.

Inventive Principle:
Principle #23Feedback

Data Source

PatentUS10966661B2Datum rebuilding method, and wearable electronic device with a datum rebuilding function
Publication Date: 2021.04.06 PIXART IMAGING INC
  • US10966661B2 patent drawing
  • US10966661B2 patent drawing
  • US10966661B2 patent drawing

AI summary

A datum rebuilding method is applied to a bio-sensor module equipped in a wearable electronic device with the datum rebuilding function. The datum rebuilding method includes continuously receiving a plurality of physical signals, identifying if one specific physical signal meets a predefined condition, and outputting a warning signal to show a reminder when the specific physical signal is identified.