Valve Bracket Strain Calibration for Accurate Torque Measurement
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Solution Overview
Problem
Current commercially available devices struggle to accurately convert strain on non-cylindrical bodies of valves into usable torque values, as existing methods are limited to cylindrical structures.
Innovation Solution
A method involving the use of a strain gauge mounted on a bracket of a valve system, applying known torques to determine the relationship between strain and torque, and subsequently converting unknown strain into determined torque values using this relationship.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If strain gauges are mounted on non-cylindrical valve brackets, then torque measurement capability is extended to complex geometries, but the conversion from strain to torque becomes mathematically complex and unreliable
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing calibration data that maps strain gauge readings to torque values for specific bracket geometries. During operation, the system retrieves pre-determined conversion factors from lookup tables based on the measured strain, avoiding complex real-time calculations and ensuring accuracy for non-cylindrical shapes.
Solution Approach 2:
The patent introduces an intermediary calibration process that creates a transfer function between strain measurements and torque values. This calibration phase serves as a mediator that translates complex geometric relationships into simplified conversion factors, enabling accurate torque measurement without direct complex geometric calculations during operation.
2Measurement precision
If standard torque cell designs are used, then torque measurement is straightforward for cylindrical bodies, but these devices cannot be applied to non-cylindrical valve components
Solution Approach 1:
The patent applies local quality by placing strain gauges at specific locations on the bracket geometry where they optimally sense torque-induced strain. The calibration process determines the precise gauge positions and orientations that maximize measurement sensitivity for the specific bracket shape, creating a tailored measurement solution for each geometry.
Solution Approach 2:
The patent changes the measurement parameters by using multiple strain gauges arranged in specific configurations (e.g., rosette patterns) and applying calibration factors that account for the bracket's specific geometry. This transforms the measurement system from geometry-dependent to geometry-independent through parameter optimization.
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 accurate and reliable conversion of strain to torque on non-cylindrical valve components, providing a practical solution for industrial process control systems.
Implementation Method 1
providing a strain gauge mounted onto the bracket; applying a first known torque to bracket; obtaining a first strain measurement data from the strain gauge
Data Source
AI summary
The embodiments disclosed herein relate to a method for obtaining a determined torque value experienced by a bracket of a valve system, having the steps of providing a strain gauge mounted onto the bracket; applying a first known torque to bracket; obtaining a first strain measurement data from the strain gauge; applying a second known torque to bracket; obtaining a second strain measurement data from the strain gauge; determining a relationship between the first known torque, the first strain measurement data, the second known torque and the second strain measurement data; and applying an unknown strain to the bracket and converting the unknown strain to the determined torque value of the bracket using the determined relationship.