Circuit Breaker Diagnosis Using Factor Probability Analysis

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Solution Overview

Problem

Conventional diagnostic techniques for circuit-breaking devices require detailed investigations to identify anomaly factors, making it difficult to obtain useful information for improving the operating state of the device.

Innovation Solution

A diagnostic apparatus with a factor probability calculation unit and an improvement processing unit that calculates the probability of each factor contributing to a symptom and proposes improvements based on measurement data and historical information, enabling quick identification of issues and actionable recommendations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional diagnostic techniques are used to identify anomaly factors, then diagnostic accuracy is improved, but time consumption and complexity increase

Engineering Contradiction:
Improvediagnostic accuracyVSAvoidtime consumption
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The system pre-calculates and stores diagnostic rules and factor relationships before actual diagnosis occurs. When an anomaly is detected, the pre-prepared diagnostic framework immediately processes the data, eliminating the need for time-consuming real-time analysis while maintaining high diagnostic accuracy

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent replaces manual detailed investigation and mechanical diagnostic procedures with an automated information processing system. The control unit automatically calculates factor probabilities and generates diagnostic results, substituting human analysis with computational algorithms that provide both accuracy and speed

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If detailed investigation is performed to identify anomaly factors, then diagnostic completeness is improved, but ease of operation deteriorates

Engineering Contradiction:
Improvediagnostic completenessVSAvoidoperational simplicity
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The diagnostic system performs self-diagnosis automatically without requiring operator intervention for detailed investigation. The control unit independently calculates factor probabilities, identifies anomaly causes, and generates diagnostic reports, making the system self-sufficient while maintaining comprehensive diagnostic coverage

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system incorporates feedback mechanisms where diagnostic results are automatically processed and used to refine future diagnoses. The control unit continuously learns from operational data, improving both diagnostic completeness and ease of use through automated feedback loops that eliminate manual investigation requirements

Inventive Principle:
Principle #23Feedback

Data Source

PatentEP3896805B1Diagnostic device
Publication Date: 2024.04.03 MITSUBISHI ELECTRIC CORP
  • EP3896805B1 patent drawingFigure 1~2
  • EP3896805B1 patent drawingFigure 3~4
  • EP3896805B1 patent drawingFigure 5

AI summary

A diagnostic apparatus (100) diagnoses a symptom of anomaly in a device that operates for making or breaking a circuit. The diagnostic apparatus (100) includes a factor probability calculation unit (15) that calculates a factor probability. The factor probability calculation unit (15) calculates a factor probability for each matter that may be a factor in a symptom observed in the device, the factor probability being a probability that the matter truly corresponds to a factor for the observed symptom. The diagnostic apparatus (100) can obtain useful information for improving the operating state of the device.