Adjustable Electrode Clusters for Bioimpedance Depth Resolution
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Solution Overview
Problem
Existing bioimpedance measurement devices face limitations in accurately measuring impedance at varying depths due to fixed electrode spacing, which restricts depth resolution and signal-to-noise ratio, especially when applied to the human body.
Innovation Solution
The apparatus and method utilize a depth controller to configure electrode clusters with adjustable widths and gaps, employing a Wenner or Wenner-Schlumberger electrode array, allowing for flexible measurement depth adjustment and improved resolution by aggregating electrodes into clusters, thereby enhancing signal quality and depth resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed electrode spacing is used in bioimpedance measurement devices, then device structure is simple, but depth resolution and signal-to-noise ratio are limited
Solution Approach 1:
The patent divides the electrode array into multiple configurable electrode clusters that can be independently selected and arranged. Each cluster can be positioned at different depths, allowing the system to segment the measurement into multiple depth layers. This segmentation enables precise depth resolution by activating only the electrode clusters relevant to the target measurement depth, thereby improving measurement precision without requiring a completely complex device structure.
Solution Approach 2:
The patent implements dynamic electrode configuration where the electrode clusters can be selectively activated and deactivated based on the desired measurement depth. The system dynamically adjusts which electrodes are connected to the measurement circuitry, allowing flexible adaptation to different measurement requirements. This dynamic reconfiguration enables the same physical electrode array to serve multiple depth measurement functions, improving depth resolution while managing device complexity through software control.
2Measurement precision
If electrode clusters with adjustable widths and gaps are implemented, then depth resolution and signal quality improve, but device complexity increases
Solution Approach 1:
The patent combines multiple electrodes into electrode clusters, where each cluster functions as a unified measurement unit. By merging adjacent electrodes into clusters with adjustable widths, the system enhances the signal-to-noise ratio through spatial averaging and increased effective electrode area. The clustering approach allows the system to treat multiple electrodes as a single functional unit, improving signal quality while managing control complexity through standardized cluster operations.
Solution Approach 2:
The patent enables adjustable electrode cluster widths and gaps as configurable parameters that can be modified based on measurement requirements. By changing the spatial parameters of electrode clusters (width, gap size, spacing), the system optimizes the signal-to-noise ratio for different measurement conditions. This parameter adjustability allows flexible adaptation to various tissue depths and measurement types, improving signal quality while keeping the control system manageable through software-based parameter configuration.
3Measurement precision
If multiple measurement depths are supported, then body composition analysis accuracy improves, but measurement time increases
Solution Approach 1:
The patent pre-configures multiple electrode clusters at different depth positions before the actual measurement process. The system prepares all necessary electrode configurations in advance, so that when measurement is required, the appropriate depth-specific electrode clusters can be rapidly activated without time-consuming reconfiguration. This preliminary setup enables quick switching between different measurement depths, improving body composition analysis accuracy while minimizing measurement time through pre-prepared electrode arrangements.
Solution Approach 2:
The patent designs a single electrode array that can serve multiple measurement depth functions through the use of configurable electrode clusters. The same physical electrodes can be arranged in different cluster configurations to measure impedance at multiple depths, allowing one device to perform multiple measurement functions. This multi-functionality enables comprehensive body composition analysis across different tissue layers without requiring separate measurement processes for each depth, thereby improving analysis accuracy while maintaining efficient measurement timing.
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
This approach enables precise impedance measurement at multiple depths, increasing depth resolution and signal-to-noise ratio, allowing for accurate analysis of body composition parameters like body fat percentage, blood sugar, and other biomarkers.
Implementation Method 1
The measurer may be configured to measure the impedance of the object by applying a current to the current electrode cluster and using a voltage applied to the voltage electrode cluster
Data Source
AI summary
An apparatus for measuring impedance is provided. The apparatus may include an electrode part in which a plurality of electrodes are arranged; a depth controller configured to configure electrode clusters from among the plurality of electrodes of the electrode part based on a measurement depth of the object, and generate a control signal; a switch configured to connect electrodes in the electrode clusters to signal lines based on the control signal; and a measurer configured to measure the impedance of the object based on signals measured through the electrode clusters.