Sensor Network Film Stretching Tool for Large Structure Monitoring
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Solution Overview
Problem
The current manufacturing process for stretchable sensor networks is inefficient and costly due to the manual stretching and placement of sensors and actuators on a film, resulting in low yield and high time consumption.
Innovation Solution
A tool with a system of interconnected rods and motors, along with clips and spacing springs, is used to evenly stretch and secure the sensor network film, allowing for precise placement of sensors and actuators through controlled tension and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual stretching and sensor placement is used, then flexibility and simplicity are maintained, but manufacturing yield is low and production time is excessive
Solution Approach 1:
The stretching tool is divided into multiple independent rods (first rod, second rod, third rod, fourth rod) that can move separately along different axes. Each rod is equipped with its own drive motor, allowing independent control of stretching in multiple directions. This segmentation enables complex stretching motions to be broken down into simple, controllable linear movements, significantly improving manufacturing efficiency while maintaining manageable system complexity
Solution Approach 2:
Spacing springs are introduced as intermediary elements between adjacent clips on the rods. These springs automatically maintain optimal spacing between clips during the stretching process, ensuring uniform film tension and proper sensor placement without requiring complex control mechanisms. The spacing springs act as passive intermediaries that simplify the overall control system while improving manufacturing precision
2Measurement precision
If sensors are placed at optimal distances to prevent signal overlap, then measurement precision is improved, but the manual placement process becomes more time consuming
Solution Approach 1:
The stretching tool pre-stretches the film to the exact dimensions and tension required for optimal sensor placement before the sensors are applied. By performing the stretching action in advance and maintaining it through the placement process, the system eliminates the need for time-consuming manual measurement and adjustment during sensor placement. The pre-established geometric framework ensures sensors are automatically positioned at correct distances
Solution Approach 2:
The manual mechanical process of measuring and positioning each sensor individually is replaced by an automated mechanical stretching system that creates a pre-defined geometric framework. The coordinated movement of multiple rods with controlled tension replaces human judgment and manual positioning, achieving both precision and speed through automated mechanical control
3Manufacturing precision
If film tension is increased to improve sensor placement accuracy, then manufacturing precision is improved, but structural integrity may be compromised
Solution Approach 1:
Different regions of the film are subjected to different tension levels through the independent rod system. The film is stretched more in regions where sensor placement precision is critical, while maintaining lower tension in areas where structural integrity is the primary concern. This localized differentiation of tension quality allows the system to optimize both precision and strength in different areas simultaneously
Solution Approach 2:
The tension applied to the film is dynamically adjusted during the stretching process rather than maintaining a constant high tension. The system applies increasing tension progressively as sensors are placed, then maintains optimal tension for placement accuracy, and finally releases tension after placement is complete. This dynamic tension management ensures structural integrity is preserved while achieving manufacturing precision when needed
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 tool enables a more efficient and cost-effective manufacturing process by ensuring optimal sensor placement, improving yield and reducing time, while maintaining structural integrity and real-time monitoring capabilities.
Implementation Method 1
spacing springs located between adjacent clips on the same rod to spread the clips out on the rod as the sensor network film is stretched
Data Source
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AI summary
A tool comprises a first rod that extends along a first axis and moves perpendicular to the first axis along a second axis. A first sliding guide moves along the first rod. A second rod extends parallel to the second axis and moves perpendicular to the second axis and parallel to the first axis, and a second sliding guide moves along the second rod. A third rod extends along a third axis and moves perpendicular to the third axis and parallel to the second axis, and a third sliding guide moves along the third rod. A fourth rod extends along a fourth axis and moves perpendicular to the fourth axis and parallel to the first axis, and a fourth sliding guide moves along the fourth rod. The periphery of the sensor network film is secured to the rods, and the rods and guides move simultaneously to stretch the film.