Bioelectrical Impedance Apparatus with Adaptive Electrode Contact Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bioelectrical impedance measurement apparatuses face challenges in efficient and easy operation, particularly when not all four limbs can be in contact due to amputations or obstructions, leading to limited measuring programs and user complexity.
Innovation Solution
A bioelectrical impedance measuring apparatus with at least eight electrodes on four limbs, featuring a control and analysis unit that performs an advance measurement to determine electrode contact and selects appropriate measuring programs based on the configuration, allowing for efficient and flexible impedance measurements across various body segments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the apparatus requires all four limbs to be in contact with electrodes for operation, then measurement completeness is improved, but ease of operation deteriorates when limbs are unavailable due to amputation or obstruction
Solution Approach 1:
The measuring program is dynamically selected based on the actual contact configuration of electrodes. The system adapts its measurement protocol in real-time according to which limbs are available, transitioning between different measuring programs (first program for all four limbs, second program for alternative configurations) to maintain operational accessibility while preserving measurement reliability through appropriate program selection
Solution Approach 2:
The system changes operational parameters by switching between different measuring programs depending on electrode contact status. When all four limbs are contact, the first measuring program is used; when limbs are unavailable, the second measuring program is activated, allowing the apparatus to maintain reliability across varying physical conditions
2Adaptability or versatility
If the apparatus offers multiple measuring programs for different electrode configurations, then adaptability is improved, but device complexity increases due to program selection and control requirements
Solution Approach 1:
The control unit automatically detects which electrodes are in contact and autonomously selects the appropriate measuring program without requiring manual intervention from the user. The system performs self-diagnosis of electrode contact status and self-configures the measurement protocol, thereby providing adaptability while minimizing the perceived complexity for the user
Solution Approach 2:
The apparatus is designed with universal functionality to handle multiple electrode contact configurations through a single unified system. The same hardware platform supports both the first measuring program (all four limbs) and the second measuring program (alternative configurations), eliminating the need for separate devices and reducing overall system complexity while maintaining high adaptability
3Ease of operation
If the apparatus automatically detects electrode contact and selects measuring programs, then ease of operation is improved, but device complexity increases due to detection and selection logic
Solution Approach 1:
The control unit continuously monitors electrode contact status through electrical detection and uses this feedback information to automatically select the appropriate measuring program. The system establishes a feedback loop where contact detection results directly influence program selection, providing ease of operation through automatic adaptation while managing control logic complexity through deterministic decision rules based on contact patterns
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 efficient and user-friendly operation by automatically or manually selecting suitable measuring programs based on electrode contact, ensuring comprehensive body composition analysis even with reduced electrode availability, thereby enhancing measurement flexibility and accuracy.
Implementation Method 1
determination of the conductivity of a body or of a body segment (or the determination of the reciprocal resistance or impedance of the body or of the body segment)
Data Source
AI summary
The present invention provides bioelectrical impedance measuring apparatus for determining composition data of the human body, the apparatus including at least eight electrodes, a pair of electrodes being assigned to each of four limbs, measuring circuitry having current sources and current and voltage measuring circuitry which may selectively be coupled to the electrodes, and a control and analysis unit which is arranged to apply, according to a plurality of predetermined measuring programs, current to two electrodes and to determine the resulting voltages with two other electrodes on different limbs and to determine the impedance of body segments based thereon. The control and analysis unit is further arranged to determine, in an advance measurement by applying current via two electrodes and measuring the resulting current through the applying electrodes and/or voltages on the other electrodes, which electrodes have contact, and to select, on the basis of the determined configuration of electrodes with contact, such matching measuring programs, in which matching measuring programs only electrodes are used for current application and voltage measurement which are contained in the determined configuration of electrodes having contact.