Pressure-Sensitive Sheet for Force Detection on Irregular Objects
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Solution Overview
Problem
Existing force-sensing technologies are not optimized for detecting forces applied to large or irregularly shaped objects, as they often require multiple sensors and struggle to cover the entire surface effectively.
Innovation Solution
A pressure-sensitive sheet comprising a first and second substrate with electrode regions and electrical connection regions, connected via pressure-sensitive ink that changes resistance in response to pressure, allowing for comprehensive force detection across a variety of object sizes and shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple pressure sensors are used to detect forces on large objects, then measurement precision is improved, but device complexity increases
Solution Approach 1:
Multiple pressure sensing elements are merged into a single continuous pressure-sensitive sheet with integrated electrode regions and conductive tracks, transforming a multi-component sensor system into a unified flexible sheet that maintains measurement precision while reducing device complexity
Solution Approach 2:
The pressure-sensitive sheet serves multiple functions simultaneously: it acts as both the sensing element and the structural substrate, while the conductive tracks provide both electrical connection and mechanical support, eliminating the need for separate components and reducing overall system complexity
2Adaptability or versatility
If traditional pressure sensors are applied to objects of various shapes, then adaptability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The pressure-sensitive sheet is constructed as a flexible thin film that can be conformally applied to objects of any shape or size, providing excellent adaptability while maintaining simple manufacturing processes through standard flexible substrate fabrication techniques
Solution Approach 2:
The sheet is designed with modular electrode regions and conductive tracks that can be independently configured for different object geometries, allowing customization for various shapes while using standardized manufacturing processes for each segment
3Ease of manufacture
If pressure-sensitive ink is used to provide electrical connection between electrode regions, then ease of manufacture is improved, but reliability may worsen
Solution Approach 1:
The pressure-sensitive ink formulation is optimized with specific conductive particle concentrations, binder ratios, and drying conditions to achieve both ease of application and reliable electrical conductivity, transforming the ink's physical parameters to balance manufacturability and performance
Solution Approach 2:
The pressure-sensitive ink is formulated as a composite material containing conductive particles, binders, and plasticizers that work together to provide both mechanical flexibility for easy application and stable electrical properties for reliable connection between electrode regions
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 detection of forces applied to large or irregularly shaped objects by providing a modular system that can be easily adapted to different sizes and shapes, with the pressure-sensitive ink ensuring reliable electrical connections and resistance changes.
Implementation Method 1
a pressure-sensitive ink arranged between the first electrode region and the second electrode region to provide an electrical connection therebetween, the pressure-sensitive ink being arranged to change electrical resistance in response to pressure changes
Data Source
AI summary
A pressure-sensitive sheet for detecting a force applied to an object, the sheet comprising: a first substrate having a first electrical connection region and a first electrode region thereon, the first electrical connection region being electrically connected to the first electrode region; a second electrical connection region and a second electrode region, the second electrical connection region being electrically connected to the second electrode region, the second electrode region being physically separated from the first electrode region; a pressure-sensitive layer arranged between the first electrode region and the second electrode region to provide an electrical connection therebetween, the pressure-sensitive layer being arranged to change electrical resistance in response to pressure changes, wherein the first electrical connection region and the second electrical connection region are arranged along different edge regions of the pressure-sensitive sheet to provide circuit terminals of the first electrode and the second electrode respectively.