Measuring Apparatus Reliability Index via PCA Loading Comparison

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Solution Overview

Problem

In measuring apparatuses, there is a lack of reliability indices to confirm the accuracy of measurement values obtained through principal component analysis (PCA) and principal component regression (PCR), making it difficult to determine if measurements are erroneous.

Innovation Solution

A measuring apparatus is configured to compare pre-obtained loadings with evaluation-use loadings from measurement samples, generating a reliability index based on the comparison results, allowing for reliability evaluation and error detection in the measurement process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If principal component analysis and regression are used to obtain measurement values, then measurement efficiency is improved, but measurement reliability cannot be confirmed due to lack of reliability indices

Engineering Contradiction:

Improvemeasurement efficiencyVSAvoidmeasurement reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements feedback by comparing the loading obtained from principal component analysis with evaluation-use loading derived from measurement samples. This comparison generates a reliability index that feeds back into the measurement process, allowing confirmation of measurement reliability while maintaining efficiency through automated index generation and threshold-based validation

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces manual verification methods with automated computational processes. Instead of mechanical or manual checking of measurement reliability, the system uses computer-based principal component analysis, automated loading comparison, and algorithmic generation of reliability indices to confirm measurement validity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If principal component analysis is performed in advance to derive loading and regression coefficient, then measurement process is simplified, but it becomes difficult to detect erroneous measurements

Engineering Contradiction:

Improvemeasurement process simplicityVSAvoiderror detection difficulty

Core Design Contradiction:

Ease of operationVSDifficulty of detecting and measuring

Solution Approach 1:

The patent introduces an intermediary reliability index that mediates between the simplified measurement process and error detection requirements. This index acts as a bridge, generated through comparison of loading with evaluation-use loading, providing an automated mechanism to detect erroneous measurements without complicating the measurement process

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent performs preliminary action by pre-calculating evaluation-use loading from measurement samples and establishing comparison criteria before actual measurements are made. This advance preparation enables automatic error detection during the measurement process without adding complexity to the operational steps

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11506536B2Measuring apparatus

Publication Date: 2022.11.22 KIOXIA CORP

AI summary

According to one embodiment, there is provided a measuring apparatus including a measurement section and a control section. The measurement section is configured to acquire a response from a sample. The control section is configured to compare a loading obtained by performing principal component analysis in advance with a first evaluation-use loading obtained by performing principal component analysis onto the response acquired from the sample, and to generate a first reliability index for measurement using principal component analysis, in accordance with a comparison result.