Put Back Bin Detection for Virtual Cart Item Returns

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Solution Overview

Problem

Traditional self-checkout systems require manual intervention for removing items from the virtual cart and ensuring items are properly restocked, leading to inefficiencies and potential shrinkage.

Innovation Solution

Implementing a system with a self-checkout kiosk and a put back bin that uses RFID, BLE, or image-based identification to create a virtual cart without individual scanning, allowing customers to add or remove items without assistance, and a put back bin to shield items from detection until restocked.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If manual intervention is used for removing items from virtual cart and ensuring restocking, then accuracy of item tracking is improved, but labor requirements and operational complexity increase

Engineering Contradiction:
Improveitem tracking accuracyVSAvoidoperational complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The system enables automatic detection and tracking of items through RFID tags, weight sensors, and image recognition technology. The virtual cart automatically updates when items are added or removed, eliminating the need for manual scanning or intervention. The put back bin automatically detects returned items and updates the virtual cart accordingly,实现ing self-service functionality without requiring associate intervention.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical operations (scanning, counting, restocking) with automated detection systems including RFID readers, weight sensors, and image recognition cameras. These systems automatically identify items, track their movement, and update the virtual cart database without human intervention, substituting mechanical human labor with automated sensing and processing systems.

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

2Measurement precision

If individual item scanning is required at self-checkout, then item identification accuracy is improved, but checkout time and customer convenience deteriorate

Engineering Contradiction:
Improveitem identification accuracyVSAvoidcheckout time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The system merges multiple item identification technologies (RFID reading, weight detection, image recognition) into a unified detection system. Instead of requiring individual barcode scanning, the system combines these sensing modalities to automatically identify and track multiple items simultaneously as they are placed in or removed from the virtual cart, dramatically reducing checkout time while maintaining identification accuracy.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

Items are pre-tagged with RFID tags before reaching the customer, and the system continuously monitors item presence and movement. When items are placed in the virtual cart or put back bin, the system has already captured identification data through automated sensing, eliminating the need for last-minute scanning at checkout and enabling immediate virtual cart updates.

Inventive Principle:
Principle #10Preliminary action

3Measurement precision

If put back bin shields items from detection, then restocking accuracy is improved, but detection system complexity increases

Engineering Contradiction:
Improverestocking accuracyVSAvoiddetection system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The put back bin extracts and isolates returned items from the general item flow by providing a dedicated receptacle with shielding. This separation prevents detection systems from mistakenly identifying returned items as still being in the virtual cart. The shielding physically blocks RFID signals and camera views for items in the put back bin, ensuring accurate tracking of only active virtual cart items while simplifying the overall detection logic.

Inventive Principle:
Principle #2Taking out (Extraction)

4Ease of operation

If automated item detection is implemented without shielding, then customer convenience is improved, but shrinkage risk increases

Engineering Contradiction:
Improvecustomer convenienceVSAvoidshrinkage prevention
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The put back bin serves as an intermediary between the virtual cart and the restocking process. It provides a controlled transition zone where returned items are temporarily held and shielded from detection systems. This intermediary structure allows the system to maintain automated detection for active items (ensuring customer convenience) while providing a secure, shielded area for returned items (preventing shrinkage by ensuring they are properly recorded as removed from the virtual cart).

Inventive Principle:
Principle #24Intermediary (Mediator)

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 real-time updating of the virtual cart and ensures accurate restocking without associate intervention, reducing shrinkage and enhancing customer convenience.

Implementation Method 1

determine an outcome of the event based on one or more images captured by the one or more imaging devices

Methodology Applied
Scientific EffectImage-based identification: Photography

Implementation Method 2

a put back bin to shield items from detection until restocked

Methodology Applied
Scientific EffectRFID detection: Electromagnetic Induction

Implementation Method 3

uses RFID, BLE, or image-based identification to create a virtual cart

Methodology Applied
Scientific EffectBLE identification: Electromagnetic Induction

Data Source

PatentUS12511636B1Item return for customized retail environments
Publication Date: 2025.12.30 AMAZON TECH INC
  • US12511636B1 patent drawing
  • US12511636B1 patent drawing
  • US12511636B1 patent drawing

AI summary

This disclosure describes, in part, systems for enabling a return of an item from an item-identification apparatus without requiring associate intervention. The systems and techniques herein provide for determining, based on first sensor data, that an item was placed in a receptacle and updating a virtual cart associated with a user operating the receptacle to indicate addition of the item. The system may then include a put back bin equipped with sensors to detect when an item is placed within a put back bin and thereby cause the system to update the virtual cart to indicate removal of the item before instructing to charge a payment instrument associated with the virtual cart.