Sensor Image Recognition for Laser Cutting Quality Analysis

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Solution Overview

Problem

Existing laser processing technologies face challenges in providing an adequate analytical description of the evolution and quality of laser cutting processes, making it difficult to monitor and ensure consistent quality control.

Innovation Solution

A data-driven empirical approach using a deep learning method with convolutional neural networks (CNNs) processes raw data from sensors to analyze laser cutting processes, enabling real-time identification of malfunctions and quality assessment through image recognition and pattern recognition.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional analytical methods are used to describe laser processing processes, then the process complexity is reduced, but the measurement precision and quality control capability deteriorate

Engineering Contradiction:
Improvequality control capabilityVSAvoidprocess description complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces conventional analytical and mechanical description methods with a data-driven neural network model. The system uses sensors to collect process data and feeds it to a neural network that learns the complex relationships between process parameters and quality outcomes, substituting traditional analytical approaches with an intelligent computational model that can capture non-linear process behavior without requiring explicit analytical formulations.

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

Solution Approach 2:

The patent transforms the approach to process description by changing from fixed analytical parameters to dynamic data-driven parameters. The neural network model processes sensor data in real-time, adapting its internal parameters (weights and biases) during training to accurately represent the complex process relationships. This allows the system to capture evolving process characteristics without being constrained by predetermined analytical models.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If real-time monitoring is implemented to ensure quality, then the reliability improves, but the loss of time for data processing increases

Engineering Contradiction:
Improvequality consistencyVSAvoiddata processing time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent implements preliminary action by training the neural network model offline using historical process data before real-time monitoring begins. During the training phase, the model learns the complex relationships between process parameters and quality outcomes from labeled datasets. Once trained, the model is deployed for real-time inference, where it can rapidly predict quality metrics without requiring complex calculations during actual processing, thus minimizing data processing time while maintaining high reliability.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent creates a virtual copy of the laser processing system through the neural network model. This digital twin or virtual model replicates the behavior of the physical system by learning from sensor data, allowing quality assessment and prediction without requiring direct real-time analysis of all raw sensor signals. The model copies the essential process dynamics and uses them for rapid quality evaluation.

Inventive Principle:
Principle #26Copying

Data Source

PatentEP4264480B1A method of analysis of industrial processing processes, corresponding apparatus and computer program product
Publication Date: 2026.02.25 PRIMA IND
  • EP4264480B1 patent drawingFigure 1
  • EP4264480B1 patent drawingFigure 2
  • EP4264480B1 patent drawingFigure 3

AI summary

A method for analysing an industrial processing process comprising: applying to at least one sensed signal (R1, R2, R3) of a set of sensed signals (R) representative of parameters of the industrial processing process a pattern-recognition operation (26), obtaining as a result a recognition signal (Q) indicative of a property of said industrial process, said set of signals (R) being sensed (30) via a set of sensors (30) and comprising signals representative of said industrial process that vary in time, wherein said method comprises: performing a pattern-recognition operation by representing said at least one sensed signal (R1, R2, R3) to which said pattern-recognition operation (26) is applied via a first digital image (Rhf); generating at least one composite image (Rf) via addition (248) to, in particular superimposing on, said first digital image (Rhf) of one or more digital images (Rhf, Rcf, Rlf) obtained from other signals of said set of sensed signals (R), said pattern-recognition operation (26) being carried out via a pattern-recognition stage (26) comprising a recognition model trained on a set of said composite images (Rf) stored (SV) in a training dataset; and applying said pattern-recognition operation (26) to an image that comprises said at least one composite image (Rf) to obtain at least one recognition signal (Q) indicative of a property of said industrial process.