Strain Detection Device Curvature Scan Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing strain gauge sensors face challenges in reducing power consumption and wiring lines while maintaining efficient detection time, particularly when detecting curved surfaces, as they often require prolonged time to obtain information due to time-division driving techniques.
Innovation Solution
A strain detection device with a sensor sheet comprising multiple strain gauges connected by power and signal lines, and a controller that sequentially scans and reads detection signals from the gauges, allowing for the calculation of curvature and determining whether to continue or stop scanning based on detected values, thereby optimizing the detection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If time-division driving technique is used to reduce power consumption and wiring lines, then power consumption and wiring complexity are reduced, but detection time is prolonged
Solution Approach 1:
The sensor sheet is divided into multiple regions with different scanning priorities. High-priority regions (those more likely to have small radius of curvature) are scanned first with more strain gauges, while low-priority regions are scanned later or with fewer gauges. This segmentation allows the system to focus detection resources on critical areas, reducing overall detection time while maintaining power efficiency.
Solution Approach 2:
Instead of scanning all strain gauges in all regions with equal thoroughness, the system performs partial scanning by adjusting the number of scanned strain gauges based on region characteristics. For regions with large radius of curvature, fewer gauges are scanned; for regions with small radius of curvature, more gauges are scanned. This partial action approach reduces detection time and power consumption while maintaining adequate detection accuracy.
2Measurement precision
If all strain gauges are scanned to ensure accurate curvature detection, then detection accuracy is improved, but detection time and power consumption increase
Solution Approach 1:
The scanning strategy is made dynamic by adjusting the number of scanned strain gauges based on the detected radius of curvature. The system initially scans a first number of strain gauges, then determines whether to scan additional strain gauges based on the curvature characteristics. This dynamic adjustment optimizes the balance between detection accuracy and efficiency, scanning more gauges only when necessary.
Solution Approach 2:
The system uses feedback from initial curvature detection to control subsequent scanning operations. After scanning a first number of strain gauges and determining the radius of curvature, the system uses this information to decide whether to continue scanning additional strain gauges. This feedback mechanism ensures that scanning resources are allocated efficiently based on actual detection needs rather than using a fixed scanning pattern.
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 reduces power consumption and detection time by implementing a thinned-out scan detection mode, allowing for efficient curved surface detection with a smaller number of strain gauges and fewer scan operations, especially for surfaces with large radii of curvature.
Implementation Method 1
a plurality of strain gauges provided side by side on a surface of a strip-shaped flexible sheet substrate... detecting the change in resistance of each strain gauge
Data Source
AI summary
According to one embodiment, a strain detection device includes a sensor sheet including strain gauges, power lines and first signal lines each connected to one end side of a respective one thereof, and ground lines and second signal lines each connected to an other end side of the respective one thereof, and a controller including a selector which sequentially scan-drives the strain gauges via the power lines and sequentially reads detection signals at the one end side of the respective strain gauges and detection signals at the other end side via the first and second signal lines, an arithmetic processor which calculates a radius of curvature based on the detection signals, and a determination unit which determines whether to stop or continue scan-driving of the strain gauges.