Stretchable Circuit Sub-segment Stress Measurement
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Solution Overview
Problem
Traditional stretchable circuits can only measure stress variance between two ends of a segment, failing to accurately design circuit layouts in wearable products as they cannot measure stress variances in different sub-segments.
Innovation Solution
A stretchable circuit comprising multiple segments with sub-segments, each containing main lines, secondary lines, and rib lines, where the main and secondary lines are electrically connected to the rib lines, allowing for strain or stress change detection in each sub-segment, and a layout method that adjusts circuit layout based on strain or stress distribution information to accurately design the circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional stretchable circuit structure is used, then the circuit can be made stretchable, but only stress variance between two ends of one segment can be measured, not stress variances in different sub-segments
Solution Approach 1:
The stretchable circuit is divided into multiple segments, with each segment further divided into multiple sub-segments. Each sub-segment contains independent main lines and secondary lines that can be electrically connected to rib lines, enabling independent stress measurement in each sub-segment. This segmentation allows the circuit to measure stress variances in different sub-segments simultaneously while maintaining overall stretchability.
Solution Approach 2:
The circuit layout transitions from a single-dimensional segment structure to a multi-dimensional structure with main lines, secondary lines, and rib lines forming a grid-like pattern. This dimensional expansion enables stress measurement across multiple spatial dimensions and sub-segments, providing comprehensive stress distribution information throughout the stretchable circuit.
2Measurement precision
If multiple main lines and secondary lines are added to measure stress in each sub-segment, then measurement capability improves, but circuit layout complexity increases
Solution Approach 1:
Multiple main lines and secondary lines are merged into a unified circuit architecture where they share common rib lines and can be interconnected through nodes. This merging approach allows comprehensive strain distribution measurement across all sub-segments while reducing redundant components and simplifying the overall circuit layout compared to having completely independent measurement circuits for each sub-segment.
Solution Approach 2:
The rib lines serve multiple functions: they provide structural support for the stretchable circuit, act as electrical connection pathways between main lines and secondary lines, and serve as reference elements for strain measurement. This multi-functionality reduces the need for separate dedicated components, thereby simplifying the circuit layout while maintaining enhanced measurement precision.
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 accurate measurement and distribution analysis of strain or stress across sub-segments, improving the design and functionality of wearable products by allowing for precise circuit layout adjustments based on measured data.
Implementation Method 1
the main line comprises a detection point for detecting the strain change or stress change in each sub-segment
Data Source
AI summary
A stretchable circuit is provided in the invention. The stretchable circuit comprises a plurality of segments. Each segment includes a plurality of sub-segments. Each sub-segment includes at least one main line, at least one secondary line, and rib lines, and in each sub-segment, the main lines and the secondary lines are electrically connected to the rib lines.