Inherent Strain Estimation Using Measured and Analytical Deformation

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Solution Overview

Problem

It is difficult to measure and estimate inherent strain with high accuracy due to its dependence on material and shape, making it challenging to predict accurately.

Innovation Solution

An arithmetic device and method that calculates an estimated inherent strain value by acquiring actual measurement deformation amounts and performing analysis using a reference inherent strain value, allowing for high-accuracy estimation through a deformation amount acquisition unit, analysis unit, and strain calculation unit.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If inherent strain is measured directly, then measurement precision would improve, but measurement difficulty increases due to indirect measurability

Engineering Contradiction:

Improveinherent strain measurement precisionVSAvoidinherent strain measurement difficulty

Core Design Contradiction:

Measurement precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The patent uses deformation amount as an intermediary measurable quantity to indirectly determine inherent strain. Instead of measuring inherent strain directly, the system measures the deformation amount of the fabrication object and uses this as a mediator to calculate the inherent strain value through the analysis unit, resolving the contradiction between measurement precision and measurement difficulty.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces direct mechanical measurement of inherent strain with a computational analysis system. The analysis unit performs calculations based on deformation amount, target shape, and reference inherent strain value to determine the inherent strain, substituting complex mechanical measurement with a more feasible computational approach.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Device complexity

If inherent strain is estimated using conventional methods, then estimation process becomes simpler, but estimation accuracy deteriorates due to material and shape dependence

Engineering Contradiction:

Improveestimation process complexityVSAvoidinherent strain estimation accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent applies local quality by considering the specific material properties and shape characteristics of each fabrication object in the estimation process. The analysis unit takes into account the particular material and shape of the object being analyzed, rather than using a generic estimation method, thereby improving accuracy while maintaining reasonable process complexity.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent improves estimation accuracy by dynamically adjusting estimation parameters based on the specific material and shape of the fabrication object. The system modifies the estimation approach according to the particular parameters of each object, allowing for accurate estimation across different materials and geometries without significantly increasing process complexity.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If actual measurement deformation amount is acquired and analyzed, then inherent strain estimation accuracy improves, but analysis complexity increases

Engineering Contradiction:

Improveinherent strain estimation accuracyVSAvoidanalysis process complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent segments the analysis process into distinct functional units: deformation amount acquisition unit, analysis unit, and inherent strain calculation unit. This segmentation allows for systematic processing of the complex analysis task, improving estimation accuracy while managing complexity through modular organization of the analysis process.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system implements feedback by using the acquired actual measurement deformation amount to refine the inherent strain estimation. The analysis unit processes the measured deformation data and feeds back the calculated inherent strain value, creating a closed-loop system that improves accuracy through iterative refinement while maintaining manageable analysis complexity.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12504748B2Arithmetic device, arithmetic method, and computer-readable storage medium

Publication Date: 2025.12.23 MITSUBISHI HEAVY IND LTD

AI summary

An arithmetic device includes a deformation amount acquisition unit that acquires an actual measurement deformation amount of a fabrication object that is manufactured based on a target shape, the actual measurement deformation amount corresponding to a deviation amount of a shape of the fabrication object from the target shape, an analysis unit that performs an analysis, based on the target shape of the fabrication object and a reference inherent strain value corresponding to a reference value of an inherent strain of the fabrication object, and acquires an analytical deformation amount corresponding to a deviation amount of the shape of the fabrication object in the analysis from the target shape, and a strain calculation unit that calculates an estimated inherent strain value corresponding to an estimated value of the inherent strain of the fabrication object with the target shape, based on the actual measurement deformation amount and the analytical deformation amount.