Multi-Layer Pressure Sensor for Wide-Range Detection Accuracy
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Solution Overview
Problem
Existing pressure sensors struggle to accurately detect pressure variations across a wide range, particularly from low to high pressures.
Innovation Solution
A pressure sensor design incorporating multiple detection areas with pressure-sensitive layers having different resistance variation ratios, allowing for precise detection of pressure changes across a broad range by utilizing transistors and electrodes configured in parallel, facing, or lattice arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single type of pressure-sensitive layer is used, then the sensor structure is simple, but the detection accuracy across a wide pressure range is insufficient
Solution Approach 1:
The pressure sensor is divided into multiple detection areas (first detection areas and second detection areas), each equipped with different types of pressure-sensitive layers. This segmentation allows each region to specialize in detecting specific pressure ranges, thereby improving overall detection accuracy across a wide pressure spectrum while maintaining a manageable structural complexity through modular design.
Solution Approach 2:
Different detection areas are assigned different pressure-sensitive layer types (first type and second type) with distinct resistance variation characteristics. This local quality differentiation enables each region to optimize its detection performance for specific pressure conditions, achieving high measurement precision across the entire pressure range without requiring a completely complex sensor structure.
2Adaptability or versatility
If multiple pressure-sensitive layers with different resistance variation ratios are used, then the detection range is extended, but the device complexity increases
Solution Approach 1:
The sensor surface is segmented into multiple detection areas, each with pressure-sensitive layers having different resistance variation ratios. This segmentation strategy extends the detection range by assigning specific layers to specific pressure ranges, while the modular segmented structure keeps the overall device complexity manageable through systematic organization.
Solution Approach 2:
The pressure sensor achieves multi-functionality by integrating multiple pressure-sensitive layer types that can detect different pressure ranges. Each layer type serves a specific detection purpose, and collectively they provide universal detection capability across a wide pressure range, from low to high pressures, without requiring separate sensor devices.
3Measurement precision
If multiple detection areas with different pressure-sensitive layers are implemented, then the pressure variation detection accuracy is improved, but the manufacturing complexity increases
Solution Approach 1:
The manufacturing process is structured around segmented detection areas, each with specific pressure-sensitive layer types. This segmentation approach improves pressure variation detection accuracy by allowing specialized layer placement in specific regions, while the systematic segmented manufacturing methodology keeps production complexity manageable through standardized procedures for each segment type.
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
The sensor effectively detects pressure variations with high accuracy from low to high pressures by utilizing transistors and electrodes configured in parallel, facing, or lattice arrangements, enhancing its detection capabilities across a wide pressure range.
Implementation Method 1
a first pressure-sensitive layer provided on the first detection electrode... a second pressure-sensitive layer provided on the second 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
Data Source
AI summary
According to one embodiment, a pressure sensor includes a plurality of first detection areas and a plurality of second detection areas. Each of the plurality of first detection areas includes a first transistor, a first detection electrode electrically connected to the first transistor, and a first pressure-sensitive layer provided on the first detection electrode. Each of the plurality of second detection areas includes a second transistor, a second detection electrode electrically connected to the second transistor, and a second pressure-sensitive layer provided on the second 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.