IMU-Guided Handheld Weld Tool for Real-Time Motion Feedback

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Solution Overview

Problem

Manual tools, such as welding torches, suffer from imprecision and human error, requiring skilled operators and extensive training, while also lacking real-time monitoring and quality assurance capabilities.

Innovation Solution

An intelligent hand-held tool equipped with sensors, including inertial measurement units, cameras, and processing subsystems, for real-time tracking and guidance of motion, orientation, and weld sequencing, enabling precise control and quality monitoring.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If manual tools are used for welding operations, then operator flexibility and adaptability are maintained, but precision and quality consistency deteriorate due to human error and skill dependency

Engineering Contradiction:
Improveweld precisionVSAvoidoperator skill requirement
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

The system incorporates real-time feedback through sensors that monitor welding parameters (temperature, position, speed) and provide immediate guidance to the operator via display or haptic feedback, enabling precision control while maintaining manual operation flexibility

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent replaces reliance on human motor skills and manual control with an automated guidance system that uses sensors, processors, and actuators to control tool position, orientation, and motion parameters, thereby achieving consistent precision independent of operator skill level

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

2Manufacturing precision

If skilled operators are required to maintain weld quality, then manufacturing precision is improved, but training time and operational complexity increase

Engineering Contradiction:
Improveweld qualityVSAvoidtraining time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The system performs self-monitoring and self-correction by automatically tracking welding parameters, comparing them against predefined specifications, and providing real-time adjustments or alerts, reducing dependency on trained operators for quality control

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

Real-time feedback mechanisms guide operators through proper welding techniques automatically, eliminating the need for extensive training while maintaining high weld quality through continuous parameter monitoring and correction

Inventive Principle:
Principle #23Feedback

3Manufacturing precision

If real-time monitoring and guidance systems are added to manual tools, then manufacturing precision and quality assurance are improved, but device complexity increases

Engineering Contradiction:
Improveweld quality controlVSAvoidsystem complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The system integrates multiple functions (sensing, processing, guidance, control) into a single multi-functional platform that can adapt to different welding operations and tool types, managing complexity through functional integration rather than separate systems

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines sensors, processors, communication modules, and control mechanisms into an integrated guidance system that operates as a unified entity, reducing overall system complexity compared to separate monitoring and control systems

Inventive Principle:
Principle #5Merging (Combining)

4Ease of operation

If automated tracking and guidance are implemented, then operator skill requirements are reduced, but device complexity and initial cost increase

Engineering Contradiction:
Improveoperator skill requirementVSAvoidsystem complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The system automatically performs tracking, parameter monitoring, and quality assessment functions that would otherwise require skilled operator judgment and control, simplifying operation while managing complexity through automation

Inventive Principle:
Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system reduces operator skill requirements, enhances weld quality, and provides real-time feedback and monitoring, improving training efficiency and quality assurance by automatically tracking and regulating welding parameters.

Implementation Method 1

an inertial measurement unit (IMU) for motion measurements

Methodology Applied
Scientific EffectInertial measurement: Accelerometer

Data Source

PatentUS12168270B2Manual tool tracking and guidance with inertial measurement unit
Publication Date: 2024.12.17 ILLINOIS TOOL WORKS INC
  • US12168270B2 patent drawing
  • US12168270B2 patent drawing
  • US12168270B2 patent drawing

AI summary

A welding system comprises a hand-held weld tool comprises a positioning and orientation measurement system having an inertial measurement unit (IMU), a processing subsystem, and a calibration apparatus. The processing subsystem is operable to compute, based on data generated by the IMU during a weld operation on a workpiece, one or more actual motion attributes for the hand-held weld tool. The calibration apparatus is configured to hold the hand-held weld tool in a known position and orientation and in stationary state for calibration of the positioning and orientation measurement system.