Multi-Layer Pressure Sensor for Wide-Range Pressure Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pressure sensors struggle to detect pressure variations across a wide range effectively.
Innovation Solution
A pressure sensor design incorporating multiple pressure-sensitive layers with varying resistance variation ratios, allowing for enhanced detection of pressure variations by adjusting the content and conductivity of conductive materials in insulating resin layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single pressure-sensitive layer is used, then the device complexity is low, but the measurement precision and detection range are limited
Solution Approach 1:
The pressure sensor is divided into multiple pressure-sensitive layers, each with different resistance variation ratios. This segmentation allows each layer to detect different pressure ranges effectively, improving overall measurement precision across a wide pressure spectrum while maintaining manageable device complexity through modular design
Solution Approach 2:
The patent uses composite pressure-sensitive layers combining insulating resin with different conductive materials (metal particles, carbon particles, conductive polymer) in varying concentrations. This creates layers with tailored resistance characteristics, enabling precise detection across different pressure ranges without significantly increasing device complexity
2Adaptability or versatility
If multiple pressure-sensitive layers with different resistance variation ratios are used, then the detection range is expanded, but the device complexity increases
Solution Approach 1:
The detection range is segmented across multiple layers, with each layer optimized for specific pressure ranges through different resistance variation ratios. This allows the sensor to adapt to wide pressure variations while keeping each layer's structure relatively simple and manageable
Solution Approach 2:
Each pressure-sensitive layer is given local quality through different conductive material compositions and concentrations, enabling each layer to respond differently to applied pressure. This local differentiation expands the overall detection range while maintaining simple individual layer structures
3Reliability
If the conductive material content is increased, then the electrical conductivity increases, but the resistance variation ratio in response to pressure decreases
Solution Approach 1:
Different pressure-sensitive layers are designed with local quality variations in conductive material content. Layers with lower conductive material content provide higher pressure sensitivity, while layers with higher content provide better signal reliability. This local differentiation allows the system to optimize both parameters across different pressure ranges
Solution Approach 2:
The use of composite materials with varying conductive filler concentrations allows tuning of the balance between conductivity and sensitivity. By selecting appropriate base resins and conductive fillers in different ratios, each layer can be optimized for its specific detection range, achieving both reliability and 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 the detection of pressure variations across a broader range with improved sensitivity, particularly at both low and high pressures, by utilizing multiple pressure-sensitive layers with tailored resistance characteristics.
Implementation Method 1
a first pressure-sensitive layer 61 and a second pressure-sensitive layer 62 provided on the detection electrode 50. The first pressure-sensitive layer 61 and the second pressure-sensitive layer 62 have different variation ratios of resistance values in response to applied pressure.
Data Source
AI summary
According to one embodiment, a pressure sensor includes a plurality of detection areas each including a transistor, a detection electrode electrically connected to the transistor, and a first pressure-sensitive layer and a second pressure-sensitive layer each provided on the detection electrode. The first pressure-sensitive layer and the second pressure-sensitive layer have different variation ratios of resistance values in response to applied pressure.