Mobile Robot Body Scanning for Stationary Virtual Fitting

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Solution Overview

Problem

Existing mobile robots are limited in the variety of services they can provide, and there is a need for improved systems that can accurately identify user body information and offer virtual fitting services with minimal user movement.

Innovation Solution

A mobile robot equipped with a driving unit, image acquisition unit, speech input unit, and display unit, which moves to a suitable position to acquire user images, scans the body, and creates an avatar with selected clothes, displaying a composite image on the display unit.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the robot uses image acquisition unit to scan user body, then body information identification accuracy is improved, but user movement requirement increases

Engineering Contradiction:
Improvebody information identification accuracyVSAvoiduser movement requirement
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

Instead of requiring the user to move into position for scanning, the patent inverts the approach by moving the robot to the user. The controller automatically navigates the robot to optimal scanning positions around the user, capturing images from multiple angles while the user remains stationary, thus maintaining measurement precision while eliminating movement requirements

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The patent transitions from a single-point scanning approach to multi-dimensional scanning by moving the robot around the user in different positions and angles. The controller manages movement in multiple spatial dimensions to capture comprehensive body images from front, side, and back views, achieving accurate 3D body information without requiring user movement

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If the robot provides multiple services including virtual fitting, then service versatility is improved, but device complexity increases

Engineering Contradiction:
Improveservice varietyVSAvoidsystem complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements multi-functionality by integrating body scanning, avatar creation, virtual fitting, and clothing recommendation services into a single robot system. The controller coordinates multiple units (image acquisition, speech input, display, driving) to deliver a complete virtual fitting service ecosystem, achieving high service versatility without proportionally increasing complexity through systematic integration

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

Solution Approach 2:

The patent uses copying by creating a digital avatar that replicates the user's body measurements and characteristics. This virtual copy enables multiple service applications (trying on different clothes, size recommendations, style suggestions) without requiring physical interaction with actual garments, reducing physical system complexity while expanding service capabilities

Inventive Principle:
Principle #26Copying

3Measurement precision

If the robot moves to acquire complete body images, then scanning accuracy is improved, but time consumption increases

Engineering Contradiction:
Improvescanning accuracyVSAvoidservice time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having the controller pre-calculate optimal scanning positions and movement paths before actual scanning begins. The robot proactively navigates to predetermined positions around the user, capturing images in an efficient sequence that minimizes total scanning time while ensuring complete body coverage and high measurement precision

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent uses periodic action by implementing structured scanning cycles where the robot systematically moves to specific positions (front, side, back) at predetermined intervals. This periodic scanning pattern ensures comprehensive coverage for accurate measurements while maintaining efficient time management through automated, rhythmical movement and capture sequences

Inventive Principle:
Principle #19Periodic action

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

Enables accurate identification of user body information, creation of avatars, and provision of virtual fitting services, enhancing user convenience and providing recommendations based on fitting and purchase history.

Implementation Method 1

image acquisition unit for acquiring user images

Methodology Applied
Scientific EffectLight reflection: Reflection

Data Source

PatentEP3900885B1Method of controlling robot
Publication Date: 2026.01.07 LG ELECTRONICS INC
  • EP3900885B1 patent drawingFigure 1
  • EP3900885B1 patent drawingFigure 2A
  • EP3900885B1 patent drawingFigure 2B

AI summary

Disclosed is a method of controlling a robot, the method including receiving user input including a request for a fitting service, moving to a position at which image data including the entire body of the user are acquirable, scanning the body of the user through an image acquisition unit, and displaying a user interface screen including a composite image obtained by composing an avatar character of the user created based on the result of scanning and an image of clothes selected by the user on a display unit.