Body Impedance Measurement Using Electrode Signal Processing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for monitoring body hydration levels are inefficient, costly, and time-consuming, requiring invasive laboratory analysis.
Innovation Solution
A method and system using a sensor device to measure body impedance by applying electrical signals through electrodes and processing the resulting signals to determine hydration levels and other health-related values, such as respiration rates, through analog and digital signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods (body mass monitoring, blood/urine testing) are used to determine hydration level, then measurement precision can be achieved, but the method becomes costly and time-consuming
Solution Approach 1:
The patent replaces complex mechanical/chemical laboratory analysis systems with an electrical impedance measurement system. By applying electrical signals through electrodes and measuring body impedance, the system determines hydration levels without requiring physical sample collection and laboratory processing, thus eliminating time loss while maintaining measurement precision.
Solution Approach 2:
The patent introduces body impedance as an intermediary parameter to indirectly measure hydration level. Instead of directly analyzing blood or urine samples, the system measures electrical impedance which correlates with body water content, providing a time-efficient indirect measurement method that maintains accuracy.
2Reliability
If conventional methods (blood and urine testing) are used to test hydration level, then reliable results can be obtained, but the method becomes invasive and costly
Solution Approach 1:
The patent replaces invasive mechanical/chemical testing (blood draws, urine collection) with non-invasive electrical impedance measurement. Electrodes placed on the skin surface deliver electrical signals and measure impedance without penetrating the body or requiring fluid collection, eliminating harmful invasive factors while maintaining reliable hydration assessment.
Solution Approach 2:
The patent uses body impedance as an intermediary that can be measured non-invasively yet reliably indicates hydration status. This intermediary parameter allows accurate hydration determination without direct contact with internal body fluids, removing the need for invasive sampling while preserving measurement reliability.
3Ease of operation
If electrical signals are applied through electrodes to measure body impedance, then non-invasive real-time monitoring is enabled, but device complexity increases
Solution Approach 1:
The patent divides the measurement system into separate functional modules: electrode assembly for signal application, analog signal processing circuitry for conditioning, and digital processing for analysis. This segmentation allows each component to be optimized independently and simplifies the overall design while enabling non-invasive real-time monitoring.
Solution Approach 2:
The patent designs the impedance measurement system to perform multiple functions: hydration level determination, respiratory rate monitoring, and other health parameter assessment. This multi-functionality justifies the device complexity by providing comprehensive health monitoring capabilities through a single integrated system.
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
Enables non-invasive, real-time monitoring of hydration levels and respiratory parameters, providing a cost-effective and efficient solution for health monitoring.
Implementation Method 1
determining the subject's bioelectrical impedance
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method and system for determining a body impedance (Zbody) of a user are disclosed. The method comprises coupling a sensor device to the user, wherein the sensor device includes at least a first and a second electrode. The method includes applying a voltage signal (Vin) through a first impedance (Zin1) to the first electrode and through a second impedance (Zin2) to the second electrode to produce an output signal. The method includes measuring a differential voltage (Vbody) across the first and second electrodes and calculating the body impedance (Zbody) using the measured differential voltage (Vbody), the voltage signal (Vin), the first impedance (Zin1), and the second impedance (Zin2).