Machine Learning Winding Condition Generator for Web Tension Control

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Solution Overview

Problem

Existing winding technologies face challenges in setting accurate winding conditions that balance web misalignment and damage, as theoretical models are not always suitable for actual web winding processes, leading to economically and temporally consuming trial-and-error methods.

Innovation Solution

A winding condition generating apparatus using machine learning to create a learning model from a combination of winding parameters and conditions, allowing for the calculation of optimal winding conditions for new webs based on input parameters, including web width, transport velocity, and winding length, to achieve target quality without relying on theoretical models.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If tightly winding the web by increasing tension, then winding misalignment is suppressed, but web damage occurs

Engineering Contradiction:
Improvewinding misalignmentVSAvoidweb damage
Core Design Contradiction:
Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by using machine learning to determine optimal winding tension values based on multiple factors including web properties, winding conditions, and target quality requirements. Instead of using fixed high tension to prevent misalignment, the system dynamically adjusts tension parameters to achieve the minimum necessary tension for quality winding, thereby preventing both misalignment and damage.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent replaces the traditional mechanical approach of theoretically calculating winding tension with a machine learning-based system. The learning model processes web parameters and winding conditions to predict optimal tension values, substituting theoretical mechanical models with data-driven predictions that better reflect actual winding behavior and achieve quality results with lower, safer tensions.

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

2Object-affected harmful factors

If loosely winding the web by lowering tension, then web damage is suppressed, but winding misalignment occurs

Engineering Contradiction:
Improveweb damageVSAvoidwinding misalignment
Core Design Contradiction:
Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

The machine learning model dynamically adjusts winding tension parameters based on specific web properties and winding conditions. For each winding scenario, the system determines the precise tension level needed to prevent misalignment without excessive tension that causes damage, optimizing the balance between these two quality aspects through learned patterns from training data.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The system uses feedback from training data consisting of actual winding results to continuously improve tension predictions. By learning from historical winding outcomes including both successful and problematic cases, the model refines its ability to predict optimal tension settings that prevent both misalignment and damage in various winding scenarios.

Inventive Principle:
Principle #23Feedback

3Ease of manufacture

If using theoretical models to determine winding tension, then calculation is simplified, but accuracy for actual web winding is limited

Engineering Contradiction:
Improvecalculation simplicityVSAvoidwinding condition accuracy
Core Design Contradiction:
Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent replaces theoretical mechanical models with a machine learning-based prediction system. The learning model processes web parameters and winding conditions to directly output optimal tension values, eliminating the need for complex theoretical calculations while achieving higher accuracy by learning from actual winding data and patterns.

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

Solution Approach 2:

The system creates a digital copy of the winding process through machine learning models that replicate the relationship between input parameters and optimal tension settings. By training on historical winding data, the model learns to predict outcomes without physical trial-and-error, copying successful winding patterns into predictive algorithms.

Inventive Principle:
Principle #26Copying

4Measurement precision

If performing actual setting using winding apparatus, then accuracy for actual results is improved, but time and cost increase

Engineering Contradiction:
Improvewinding condition accuracyVSAvoidsetting time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The system performs preliminary action by pre-training machine learning models using historical winding data before actual production winding. The learning model accumulates knowledge from past winding outcomes, enabling it to predict optimal tension settings instantly for new winding scenarios without requiring actual trial-and-error testing on the winding apparatus.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by creating virtual training data that replicates actual winding scenarios and outcomes. This digital copy of the winding process allows the system to learn optimal settings in a virtual environment, transferring this knowledge to real-world applications without repeated physical experimentation.

Inventive Principle:
Principle #26Copying

Data Source

PatentUS11960992B2Winding condition generating apparatus, winding apparatus, winding defect level prediction value generating apparatus, winding condition calculating method, winding method, and winding defect level prediction value generating method
Publication Date: 2024.04.16 FUJIFILM CORP
  • US11960992B2 patent drawing
  • US11960992B2 patent drawing
  • US11960992B2 patent drawing

AI summary

A winding condition generating apparatus includes: an input unit; an output unit; and a condition calculation unit. A winding condition calculation unit includes a learning model created by machine learning using a combination of a winding parameter and a winding condition in producing a wound web that satisfies a target winding quality as training data, and calculates a winding condition of a new wound web using the learning model, from a winding parameter of a new wound web input through the input unit. The output unit outputs the winding condition. The winding parameter includes a web width, a web transport velocity, and a web winding length. The winding condition includes a tension of the web at the start of winding and a tension of the web at the end of winding.