RFID Reading Apparatus Isolation for Self-Checkout Accuracy

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Solution Overview

Problem

Conventional RFID tag reading apparatuses in self-checkout systems are inefficient due to environmental interference, as the reading area is not isolated from the customer, leading to reduced reading accuracy and efficiency.

Innovation Solution

A reading apparatus with a housing and an opening and closing lid that separates the RFID tag reading area from the customer, using electric wave reflecting or absorbing materials to minimize external interference, and a planar RFID antenna for efficient tag reading within the isolated space.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the reading area is not isolated from the customer space, then the device complexity is reduced, but the reading accuracy and efficiency deteriorate due to environmental interference

Engineering Contradiction:

ImproveRFID tag reading accuracyVSAvoidreading apparatus structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The reading apparatus is divided into a housing that encloses the antenna and reading module, separating the reading function from the customer interaction space. This segmentation isolates the sensitive reading components from environmental interference while maintaining operational accessibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The housing acts as an intermediary structure between the customer space and the reading components. It provides physical isolation and electromagnetic shielding to protect the reading process from external interference while allowing the system to remain integrated in the self-checkout apparatus.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If the reading area is isolated using a housing and lid, then the reading efficiency is improved, but the ease of operation deteriorates due to additional components

Engineering Contradiction:

ImproveRFID tag reading efficiencyVSAvoidcommodity placement operation

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The lid is designed to be movable rather than fixed, allowing it to open for commodity placement and close for reading operations. This dynamic design enables the system to adapt between different operational states (loading vs. reading) without requiring separate apparatuses.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The housing and lid structure serves multiple functions: it provides electromagnetic shielding during reading, allows access for commodity placement when open, and can guide the commodity into the reading position. This multi-functionality reduces the need for additional separate components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If environmental interference is not blocked, then the device complexity is reduced, but the reliability of reading operation deteriorates due to incorrect operations

Engineering Contradiction:

Improvereading operation reliabilityVSAvoidhousing and lid structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The housing creates an electromagnetically inert environment by shielding the reading space from external electromagnetic interference. This isolation ensures that the reading operation occurs in a controlled environment, preventing incorrect readings caused by external signals.

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

Solution Approach 2:

The housing and lid structure provides beforehand protection against potential reading errors by isolating the reading process from environmental interference before it can cause incorrect operations. This preventive measure ensures reliable reading without requiring complex error correction mechanisms.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 solution enhances RFID tag reading efficiency by isolating the reading area from environmental influences, preventing incorrect operations and ensuring accurate and efficient data collection during self-checkout processes.

Implementation Method 1

using electric wave reflecting or absorbing materials to minimize external interference

Methodology Applied

Scientific EffectElectromagnetic reflection: Reflection

Implementation Method 2

using electric wave reflecting or absorbing materials to minimize external interference

Methodology Applied

Scientific EffectElectromagnetic absorption: Absorption (EM radiation)

Implementation Method 3

a planar RFID antenna for efficient tag reading within the isolated space

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS9519897B2Reading apparatus and commodity sales data processing apparatus

Publication Date: 2016.12.13 TOSHIBA TEC KK

AI summary

In accordance with one embodiment, a reading apparatus which reads information from a RFID tag attached to a commodity comprises a housing which includes an opening serving as an entrance/exit of the commodity and space for housing the commodity inside; an antenna arranged in the space; an opening and closing lid for opening and closing the opening; a reading module which reads information relating to the commodity from the RFID tag attached to each commodity housed in the housing through the antenna; and an output module which outputs the information read by the reading module.