Matrix Electrode Sensor for Multidirectional Stress Detection
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Solution Overview
Problem
Existing sensor devices struggle to accurately detect the three-dimensional shape and stress distribution of objects by simultaneously measuring the direction and amount of stress applied.
Innovation Solution
A sensor device comprising a substrate with a sensor layer and individual electrodes arranged in a matrix, generating electric fields in different directions to detect expansion, contraction, and shear stress, allowing for three-dimensional shape reconstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor device uses a single electrode configuration to detect stress, then the device complexity is reduced, but the measurement precision of stress direction and three-dimensional shape is insufficient
Solution Approach 1:
The sensor device divides the detection function into multiple individual electrodes arranged in a matrix pattern, with each electrode responsible for detecting stress in specific directions. This segmentation allows simultaneous measurement of stress in multiple directions (x-axis, y-axis, and shear stress) using separate electrode pairs, thereby improving measurement precision without requiring a single complex electrode structure
Solution Approach 2:
The patent transitions from single-direction stress detection to multi-directional detection by arranging electrodes in a two-dimensional matrix configuration. By applying electric fields in different directions (x-axis, y-axis, and diagonal directions for shear stress), the system captures stress information across multiple dimensions, enabling accurate three-dimensional shape reconstruction
2Measurement precision
If multiple electric fields are applied simultaneously to detect stress in different directions, then the three-dimensional shape reconstruction accuracy is improved, but the use of energy increases
Solution Approach 1:
The sensor device applies electric fields in a periodic sequence rather than simultaneously. The control unit alternates between applying electric fields in different directions (x-axis, y-axis, and shear stress directions) across different time periods. This periodic application allows the system to collect stress information from multiple directions while minimizing energy consumption by ensuring that only one electric field is active at any given moment
Solution Approach 2:
The system applies electric fields selectively to specific electrode pairs based on the detection requirements. Rather than continuously applying all possible electric fields, the control unit activates only the necessary electrode pairs for the current measurement phase, reducing overall energy consumption while maintaining sufficient data for three-dimensional shape reconstruction
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 simultaneous detection of stress direction and amount, providing accurate three-dimensional shape reconstruction of objects.
Implementation Method 1
the sensor layer having a resistance value that changes according to an applied stress
Data Source
AI summary
According to one embodiment, a sensor device comprises a substrate, and a sensor layer superposed on the substrate, the substrate includes a plurality of individual areas arranged in a matrix in a first direction and a second direction that intersect each other, a plurality of individual electrodes arranged in the plurality of individual areas, and a common electrode facing the plurality of individual electrodes and generating a plurality of electric fields between the plurality of individual electrodes, wherein the plurality of electric fields are in different directions in a planar view, and the plurality of electric fields in different directions are applied to the sensor layer.