Deformation-Section Force Sensing for Tight Axial Gasket Space
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Solution Overview
Problem
Existing force sensing methods face challenges in accurately measuring forces due to limited space, making it difficult to install strain sensors in gaskets with hollow structures used for bolt tightening.
Innovation Solution
A force sensing device with a force receiving surface featuring protruding and recessed regions, a deformation section, and embedded or attached strain sensors to detect strain perpendicular to the force direction, allowing for accurate force measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If strain sensors are installed in a gasket with hollow structure to measure tightening force, then force measurement capability is achieved, but the limited axial space makes sensor installation difficult
Solution Approach 1:
The patent changes the measurement dimension from axial (parallel to force direction) to radial (perpendicular to force direction). Strain sensors are arranged radially in the deformation section, detecting strain caused by radial expansion/contraction when axial force is applied. This dimensional transformation allows sensor placement in the limited radial thickness of the gasket without requiring excessive axial length.
Solution Approach 2:
The patent transforms the physical parameter being measured from direct axial compression strain to radial strain. By designing the deformation section with specific geometry (protruding and recessed regions), axial force induces radial deformation that can be detected by sensors positioned in the radial direction, making effective use of the gasket's radial thickness.
2Measurement precision
If multiple strain sensors are installed in the gasket to detect compressive strain, then force detection accuracy is improved, but device complexity and installation difficulty increase
Solution Approach 1:
The deformation section serves multiple functions: it transmits axial compressive force from the gasket, transforms this force into radial strain through its geometric design (protruding and recessed regions), and provides a structured platform for sensor mounting. This multi-functionality reduces overall system complexity by integrating force transmission and strain transformation into a single component.
Solution Approach 2:
The deformation section features localized protruding and recessed regions that concentrate and direct the strain field. This local geometric modification creates predictable strain patterns in specific areas, allowing sensors to be positioned optimally for maximum measurement accuracy while simplifying the overall sensor layout and installation process.
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 solution enables precise force detection by effectively utilizing the deformation of the force receiving surface to generate measurable strain, overcoming the limitations of space and improving measurement accuracy.
Implementation Method 1
a sensor for sensing strain caused by deformation of the deformation section in a plane perpendicular to the direction of the force
Implementation Method 2
The deformation section is deformed when the force is applied to the protruding regions
Data Source
AI summary
A device for sensing a force includes a force-receiving surface with protruding regions and recessed regions, a deformation section, and a sensor for sensing strain caused by deformation of the deformation section.