Pressure Sensor Structure With Staggered Protrusions for Wider Detection
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Solution Overview
Problem
Existing pressure sensors have a low degree of adaptability and detection sensitivity, limiting their applicability in various environments.
Innovation Solution
A pressure sensor with an electrode layer and a sensitive layer featuring protrusion structures of different heights, arranged to vary contact area with the electrode layer under pressure, enabling differential pressure-sensitive ranges and improved sensitivity through graded pressure distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single-type protrusion structure is used in the pressure sensor, then the structure is simple, but the detection range and sensitivity are limited
Solution Approach 1:
The sensitive layer is segmented into multiple protrusion structures with different heights (first, second, and third protrusion structures). Each protrusion structure contacts the electrode layer at different pressure levels, dividing the detection range into multiple segments. This segmentation enables the sensor to detect a broader pressure range with higher sensitivity at each segment while maintaining a relatively simple overall structure.
Solution Approach 2:
The invention introduces height as an additional dimension for the protrusion structures. By varying the heights of different protrusion structures, the patent creates a three-dimensional configuration that allows multiple contact points with the electrode layer at different pressure levels. This dimensional approach expands the detection range without significantly increasing planar complexity.
2Adaptability or versatility
If protrusion structures of different heights are arranged to contact the electrode layer at different pressures, then the detection range is expanded, but the structure becomes more complex
Solution Approach 1:
Different regions of the sensitive layer are assigned different local qualities through protrusion structures of varying heights. The first protrusion structures (tallest) are positioned to contact at low pressure, second protrusion structures (medium height) at medium pressure, and third protrusion structures (shortest) at high pressure. This local differentiation enables the sensor to adapt to various pressure levels while maintaining an organized, manageable structure.
3Measurement precision
If the sensitive layer is designed with multiple protrusion structures, then pressure-sensitive ranges are staggered, but manufacturing precision requirements increase
Solution Approach 1:
The protrusion structures are pre-formed with specific height differences during the manufacturing process. The first, second, and third protrusion structures are created with predetermined height relationships that ensure proper contact sequencing with the electrode layer. This preliminary action during manufacturing ensures that the pressure-sensitive ranges are properly staggered without requiring post-processing adjustments, thereby managing manufacturing precision requirements.
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 adapts to diverse pressures, expanding detection range and sensitivity by staggered pressure-sensitive ranges and maintaining contact with the electrode layer, enhancing measurement accuracy and reliability.
Implementation Method 1
the area of contact between each protrusion and the electrode layer is configured to vary with changes in pressure applied to the electrode layer
Implementation Method 2
at least two types of protrusion structures of different heights protruding from the base layer... configured to contact the electrode layer when subjected to pressure greater than a predetermined threshold
Data Source
AI summary
A pressure sensor including an electrode layer and a sensitive layer. The sensitive layer is provided with at least two types of protrusion structures of different heights. Each type of the protrusion structure includes at least one protrusion. Each protrusion is located on a side of a base layer facing the electrode layer, and the area of contact between each protrusion and the electrode layer is configured to vary with changes in pressure applied to the electrode layer. In this way, the pressure sensor can adapt to detection environments under various pressures, thereby effectively increasing the detection range of the pressure sensor and improving the detection sensitivity of the pressure sensor. Further provided is a battery cell and an electrical device.