Bioelectrical Impedance Estimation During Settling for Faster Measurement
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Solution Overview
Problem
Conventional bio-processors require a long settling time for bio-signals to stabilize, necessitating prolonged user contact and potentially reducing accuracy due to factors like sweating, which limits motion and increases discomfort.
Innovation Solution
A bio-processor that measures bioelectrical impedance during a portion of the settling time and estimates the settled value using a digital signal processor, modeling changes in impedance with a fitting function to generate accurate bio-data quickly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the bio-processor waits for the bio-signal to fully settle before analysis, then the measurement accuracy is improved, but the measurement time increases
Solution Approach 1:
The patent applies partial action by measuring and analyzing the bio-signal during the settling time period rather than waiting for complete settlement. The processor performs analysis on partially settled signals, achieving acceptable accuracy without the full settling duration, thus reducing measurement time while maintaining sufficient measurement quality
Solution Approach 2:
The patent implements preliminary action by starting the analysis process during the settling time before the signal fully stabilizes. The processor begins processing the bio-signal while it is still settling, rather than waiting for completion, thereby reducing the overall measurement time while obtaining usable analysis results
2Measurement precision
If the sensing time is extended to include the full settling time, then the bio-data accuracy is improved, but the user comfort deteriorates due to prolonged contact requirement
Solution Approach 1:
The patent uses partial action by requiring the user to maintain contact only during the reduced sensing time that includes partial settling time, rather than the full settling time. This partial duration is sufficient to obtain accurate bio-data while significantly improving user comfort by reducing the burden of prolonged stillness
Solution Approach 2:
The processor performs preliminary analysis during the settling time period, allowing accurate bio-data generation without requiring the user to maintain contact for the entire settling duration. The analysis is initiated and completed within the reduced sensing time window, improving ease of operation
3Stability of the object's composition
If the sensing time is prolonged, then the bio-signal stability is improved, but the accuracy deteriorates due to user sweating during extended measurement
Solution Approach 1:
The patent applies partial action by utilizing only the necessary portion of the settling time for sensing, rather than waiting for complete signal stabilization. This partial settling period is sufficient to achieve stable enough signals for accurate analysis while minimizing the time duration that would cause sweating and accuracy degradation
Solution Approach 2:
The system performs preliminary signal processing and analysis during the settling time, extracting usable bio-signal data before sweating and motion artifacts significantly degrade the signal quality. This timing strategy captures stable signal characteristics early in the settling period
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces measurement time and enhances accuracy of bio-data generation by estimating settled bioelectrical impedance without waiting for full stabilization, improving user comfort and data reliability.
Implementation Method 1
a bioelectrical impedance sensor configured to measure a measured bioelectrical impedance during a sensing time such that the sensing time includes a portion of a settling time
Data Source
AI summary
A bio-processor, a bio-signal detecting system, and an operation method of the bio-processor are provided. The bio-processor includes a bioelectrical impedance sensor and a digital signal processor. The bioelectrical impedance sensor measures bioelectrical impedance during a sensing time including a portion of a settling time. The digital signal processor estimates a settled bioelectrical impedance value based on changes in the measured bioelectrical impedance. The digital signal processor generates bio-data based on the settled bioelectrical impedance value. The bio-processor reduces a time when a bio-signal is measured and ensures accuracy of the settled bioelectrical impedance value.