Arcuate Sensor Membrane for High-Pressure Load Bearing
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Solution Overview
Problem
Existing pressure or force sensor membranes face limitations in withstanding high differential pressures due to a trade-off between strength and elasticity, often resulting in rupture or reduced sensitivity under high loads.
Innovation Solution
The membrane is designed with an arcuate cross-sectional shape in the elastic region, featuring a convex outer profile and a concave inner profile, where the material thickness continuously decreases to a minimum and then increases, enhancing loading capacity while maintaining high elasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the minimal material thickness of the membrane is decreased to increase elasticity, then the elasticity increases, but the strength and load-bearing capacity diminish
Solution Approach 1:
The membrane features a non-uniform thickness distribution with a thinnest point in the elastic region that increases towards the outer and inner edges. This local variation in material thickness allows the thinnest area to provide maximum elasticity for deflection while the thicker edge regions provide the strength needed to withstand pressure loads without rupture.
Solution Approach 2:
The membrane cross-section is designed with a curved profile rather than being flat, creating a three-dimensional arcuate shape. This dimensional change from a flat to curved geometry provides structural strength while maintaining the thinnest point configuration, enabling the membrane to withstand higher differential pressures without sacrificing elasticity.
2Strength
If the minimal material thickness of the membrane is increased to increase strength, then the strength increases, but the elasticity is reduced leading to increased installation sensitivity
Solution Approach 1:
The membrane features a non-uniform thickness distribution with a thinnest point in the elastic region that increases towards the outer and inner edges. This local variation in material thickness allows the thinnest area to provide maximum elasticity for deflection while the thicker edge regions provide the strength needed to withstand pressure loads without rupture.
3Ease of manufacture
If the membrane is designed with constant material thickness to simplify manufacturing, then the ease of manufacture increases, but the load-bearing capacity and elasticity are compromised
Solution Approach 1:
The membrane features a non-uniform thickness distribution with a thinnest point in the elastic region that increases towards the outer and inner edges. This localized thickness variation is achieved through controlled forming processes that create the arcuate cross-sectional shape, optimizing both performance and manufacturability.
Solution Approach 2:
The membrane cross-section is designed with a curved profile rather than being flat, creating a three-dimensional arcuate shape. This curvature is formed through controlled processing that creates the desired thickness distribution, combining manufacturing feasibility with enhanced mechanical performance.
4Strength
If the membrane is designed with arcuate cross-sectional shape with thinnest point to optimize performance, then the load-bearing capacity and elasticity are improved, but the manufacturing complexity increases
Solution Approach 1:
The membrane cross-section is designed with a curved profile rather than being flat, creating a three-dimensional arcuate shape. This curvature is formed through controlled processing that creates the desired thickness distribution, combining manufacturing feasibility with enhanced mechanical performance.
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 configuration significantly increases the load-bearing capacity of the membrane while maintaining the same level of elasticity, allowing it to withstand higher pressures without rupture or plastic deformation, making it suitable for high-pressure applications.
Implementation Method 1
at least one elastic region between the outer and the inner edge having a thinnest point
Data Source
AI summary
A pressure or force sensor has a sensor housing, a measuring element in the housing, and a sensor membrane. The membrane is delimited by an inner edge and an outer edge, which is connected in a pressure-resistant manner to the sensor housing. The inner edge transitions in a pressure-resistant manner into a movable plunger, the travel of which can be detected by the measuring element. The membrane has one or more elastic regions between the outer edge and the inner edge, each region having a thinnest point, wherein the material thickness inside the elastic region increases steadily on both sides of this thinnest point. The cross-section of the membrane has an arched shape in each elastic region, and the arched shape has a convex outer and concave inner contour relative to the arch orientation.