Magnetic Accessory Identification Without NFC or Optical Readers

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Solution Overview

Problem

Existing accessory identification methods require high hardware resource costs and compromise security due to the need for cameras, scanning guns, or NFC card readers, which are resource-intensive and vulnerable to information theft.

Innovation Solution

An accessory identification method using a magnetic field intensity detection element to generate characterization data, which is matched with an accessory index table to determine identification information, ensuring security by hiding the identification process and reducing hardware requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a camera or scanning gun is used to read two-dimensional codes or bar codes, then accessory identification can be achieved, but hardware resource requirements increase and system complexity increases

Engineering Contradiction:

Improveidentification implementationVSAvoidhardware resources

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical/optical identification system (camera, scanning gun, two-dimensional codes, bar codes) with a magnetic field-based detection system. The magnetic detection element detects magnetic field characteristics generated by magnetic components in accessories, eliminating the need for complex optical hardware while achieving accessory identification.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of manufacture

If a camera or scanning gun is used to read two-dimensional codes or bar codes, then accessory identification can be achieved, but the identification information becomes exposed and prone to copying and theft

Engineering Contradiction:

Improveidentification implementationVSAvoidinformation security

Core Design Contradiction:

Ease of manufactureVSLoss of information

Solution Approach 1:

The patent replaces exposed optical codes with hidden magnetic field characteristics. The magnetic components generate magnetic fields that are detected indirectly through magnetic detection elements, making the identification information non-exposed and resistant to copying, as the magnetic field characteristics cannot be easily captured or replicated.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If an NFC RFID tag is added to the accessory and an NFC card reader is installed in the electronic device, then accessory identification can be achieved, but the cost and power consumption increase

Engineering Contradiction:

Improveidentification implementationVSAvoidpower consumption

Core Design Contradiction:

Ease of manufactureVSUse of energy by moving object

Solution Approach 1:

The patent replaces the NFC RFID system with a magnetic field detection system. The magnetic detection element passively detects magnetic field characteristics generated by magnetic components in accessories without requiring active communication protocols, significantly reducing power consumption while maintaining identification capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Ease of manufacture

If an NFC card reader is installed in the electronic device, then accessory identification can be achieved, but the cost of the electronic device increases

Engineering Contradiction:

Improveidentification implementationVSAvoidhardware cost

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent replaces the expensive NFC card reader with a simple magnetic detection element. This magnetic detection element is significantly cheaper and simpler in structure, eliminating the need for complex NFC communication hardware while achieving accessory identification through magnetic field detection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 method effectively identifies accessories with minimal hardware resources, ensuring security by using magnetic field detection, thus reducing costs and preventing information theft.

Implementation Method 1

generating target magnetic intensity characterization data by the magnetic intensity detection element in response to a magnetic intensity of a magnetic component in a target accessory

Methodology Applied

Scientific EffectMagnetic field detection: Magnetic Field

Data Source

PatentUS20260043877A1Accessory identification method and device, and storage medium

Publication Date: 2026.02.12 AAC ACOUSTIC TECH (SHENZHEN) CO LTD

AI summary

An accessory identification method includes: generating target magnetic intensity characterization data by the magnetic intensity detection element in response to a magnetic intensity of a magnetic component in a target accessory, when it is detected that the target accessory is located at a preset target position of the electronic device; matching the target magnetic intensity characterization data with a preset accessory index table; and determining accessory identification information corresponding to a matched magnetic field intensity characterization data range as identification information of the target accessory. According to the present disclosure, the identification information of the accessory can be hidden, which is conductive to achieving the security of the accessory information. Meanwhile, excessive detection devices is not required and thus the volume occupied by hardware can be reduced, thereby saving the hardware resource cost.