Hysteresis Compensation for Weighing Sensors Using Virtual Calibration Curves
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Solution Overview
Problem
Existing hysteresis compensation methods for weighing sensors and systems suffer from limited application ranges and unreliable compensation effects, particularly in complex situations where envelope curves crossover, leading to inaccurate and unreliable measurements.
Innovation Solution
A new hysteresis compensation method that calculates and corrects hysteresis errors using a system hysteresis error model in conjunction with an ideal hysteresis error model, establishing a proportional relationship to simplify complex situations and improve precision, allowing for accurate compensation even in crossover conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an e-exponential or similar mathematical method is used for compensating hysteresis errors, then the compensation process can be automated, but the fitting relationship between the mathematical method and envelope curve shape cannot be guaranteed in practice, resulting in poor compensation effect
Solution Approach 1:
The patent creates a virtual copy of the hysteresis calibration process by constructing a virtual hysteresis calibration curve that replicates the actual calibration characteristics. This virtual curve is then used to determine compensation values, allowing automated compensation while maintaining accuracy by preserving the essential features of the actual hysteresis behavior without requiring direct fitting of complex mathematical functions to the envelope curve.
2Adaptability or versatility
If hysteresis calibration is performed on complicated weighing sensors or systems, then the compensation method can be applied to various systems, but envelope curves for hysteresis calibration may crossover, resulting in uncertain state and affecting reliability
Solution Approach 1:
Instead of trying to fit a mathematical function to the envelope curve and risk encountering crossover issues, the patent inverts the approach by directly constructing a virtual hysteresis calibration curve that mirrors the actual calibration characteristics. This virtual curve is built from the calibration data itself, ensuring that it accurately represents the system's hysteresis behavior without the mathematical fitting problems that cause reliability issues in complex systems.
Solution Approach 2:
The virtual hysteresis calibration curve serves as an intermediary between the actual calibration data and the compensation calculation. It translates the complex, potentially crossover-prone envelope curves into a simplified virtual representation that can be reliably used for compensation without directly manipulating the problematic mathematical relationships of the original calibration curves.
3Adaptability or versatility
If hysteresis compensation is applied to complicated weighing systems, then the method can handle real-world complexity, but the application range is limited due to the uncertain state caused by envelope curve crossovers
Solution Approach 1:
The virtual hysteresis calibration curve construction method is universally applicable to different weighing systems regardless of their complexity. By building the virtual curve from the actual calibration data of each specific system, the method adapts to various system characteristics while maintaining a consistent compensation approach, thereby expanding application range without sacrificing precision.
Data Source
AI summary
A hysteresis compensation method, in which a hysteresis error is calculated for an obtained weighing value by means of an ideal hysteresis error model, and an ideal compensation value is further calculated by means of an ideal hysteresis compensation model, wherein by using a proportional relationship between a system hysteresis error model established in hysteresis calibration and the ideal hysteresis error model, the ideal compensation value is corrected to a final compensation value. The method establishes a mapping relationship between the system's own hysteresis compensation and the ideal state hysteresis compensation, and realizes the transformation of a complicated hysteresis error compensation situation into an ideal hysteresis error compensation situation. The method not only has a good compensation effect for the hysteresis error compensation under ideal situations, but also can obtain an excellent hysteresis compensation effect under complicated hysteresis situations.