Calibration Element Apertures for Force Transducer Stability
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Solution Overview
Problem
The adjustment of calibration elements in force transducers, such as pressure sensors, is complex and prone to reliability and stability issues over time due to production variations and mechanical stresses.
Innovation Solution
A method involving calibration elements with predefined apertures, such as circular or oval holes, is used to adjust electrical behavior by making incisions between edges and apertures, reducing the risk of crack propagation and allowing for precise and stable calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional calibration adjustment methods are used, then calibration can be performed, but the process becomes complex and reliability deteriorates over time due to crack propagation
Solution Approach 1:
The calibration element is segmented by introducing multiple apertures (first, second, third apertures) that divide the structure into distinct regions. This segmentation allows for controlled adjustment of the calibration signal through selective connection or disconnection of segments via incisions, simplifying the adjustment process while maintaining reliability by preventing uncontrolled crack propagation.
Solution Approach 2:
The apertures are pre-configured in specific positions and shapes during manufacturing, establishing a predetermined structure that guides the calibration adjustment process. The incisions are then made to connect or disconnect these pre-positioned apertures, allowing for systematic and reliable calibration adjustment without complex real-time decision-making.
2Manufacturing precision
If calibration elements are adjusted without predefined apertures, then adjustment flexibility is maintained, but positional tolerances cause instability in calibration
Solution Approach 1:
Different regions of the calibration element are assigned different functions through the aperture configuration. The first aperture is positioned to control connection between specific conductive paths, the second aperture controls alternative paths, and the third aperture provides additional adjustment capability. This local differentiation of functions allows precise calibration control while maintaining manufacturing simplicity through standardized aperture patterns.
3Adaptability or versatility
If incisions extend beyond aperture boundaries, then calibration adjustment range increases, but crack propagation risk increases reducing reliability
Solution Approach 1:
The apertures are designed with sufficient margins from the edges of the calibration element and from each other, creating buffer zones that prevent stress concentration and crack initiation. The incisions are constrained to stop at aperture boundaries rather than extending to edges, providing a safety margin that cushions against crack propagation while still allowing adequate calibration adjustment range through the aperture network.
Data Source
AI summary
A method for adjusting the electrical behavior or characteristics of a calibration element includes adjusting the electrical behavior or characteristics of the calibration element by making one or more incisions or cuts in the calibration element. The calibration element has a plurality of apertures, and the method includes making an incision or cut in the calibration element between an edge thereof and at least one of the apertures, and/or making an incision or cut in the calibration element between at least two of the apertures.