Reversible Force Measuring Device Using Poisson Effect
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Solution Overview
Problem
Existing force measuring devices struggle to continuously and accurately measure static and dynamic forces such as tension, compression, torque, and shear, as they often lack the ability to reversibly indicate changes in force magnitude and direction effectively.
Innovation Solution
A reversible force measuring device with at least one cavity that undergoes reversible volumetric changes due to applied loads, utilizing the Poisson effect to move indicating materials in or out of the cavity, allowing continuous measurement of force changes, including direction and magnitude, through mechanisms like indicator ducts and channels made of transparent materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing force measuring devices are used, then they can measure forces, but they cannot continuously and accurately indicate changes in force magnitude and direction
Solution Approach 1:
The patent employs indicating materials that change color or exhibit visual changes in response to volumetric changes in the cavity. This allows continuous visual indication of force magnitude and direction through color intensity or color change, providing both accuracy and continuous monitoring capability without requiring complex electronic systems.
2Productivity
If reversible volumetric changes are utilized, then continuous measurement of force changes is enabled, but device complexity increases due to additional components like indicator ducts and channels
Solution Approach 1:
The patent integrates the indicator ducts and channels directly into the cavity structure, merging the measurement function with the structural components. The indicator channels are formed as integral parts of the housing or cavity walls, eliminating the need for separate, complex indicator mechanisms and reducing overall device complexity while maintaining continuous measurement capability.
Solution Approach 2:
The indicating material acts as an intermediary that translates complex volumetric changes into simple visual signals. This mediator converts the mechanical deformation of the cavity into easily observable color or position changes, simplifying the interpretation of continuous force measurements without requiring complex sensing or display systems.
3Loss of information
If indicating materials are used to show force changes, then force magnitude and direction can be indicated, but sensitivity and accuracy may be reduced
Solution Approach 1:
The patent applies indicating materials specifically in regions where volumetric changes are most pronounced or where they provide the most informative visual signal. By strategically positioning the indicating materials in high-sensitivity zones of the cavity structure, the system maximizes the visual response to force changes while maintaining overall measurement accuracy and sensitivity.
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 precise and continuous indication of force changes, returning to original shape when loads are reversed, enhancing sensitivity and accuracy in measuring various types of forces, including shear and compression, by utilizing reversible volumetric changes and indicating materials.
Implementation Method 1
applying force to the at least one load receiving area in the at least one of a fastener component or a load cell component induces the Poisson effect on the at least one cavity wall, wherein the Poisson effect causes the reversible volumetric change of the at least one cavity
Implementation Method 2
when load is applied to the device it causes a reversible volumetric change to the at least one cavity which causes an indicating material to move in or out of the at least one cavity to indicate the magnitude and/or direction of the applied loads
Data Source
AI summary
A reversible force measuring device that can comprise at least one cavity, at least one load receiving area, and at least one indicating material; wherein the indicating material moves in or out of the at least one cavity as its volume changes to indicate the magnitude and/or direction of the applied loads. A reversible force measuring device that can comprise at least one cavity, at least one load receiving area, and at least one indicating material; a fastener causes the indicating material to move in and out of the at least one cavity to indicate the magnitude and/or direction of the applied loads. A reversible force measuring device comprising at least two independent cavities, at least one load receiving area, and at least one indicating material; wherein the difference in volume changes indicates the force as the indicating material moves in or out of the at least two cavities.