PEPS Antenna Inventory Tracking via RFID

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Solution Overview

Problem

Current inventory tracking systems for vehicles lack efficient and cost-effective methods to monitor items within vehicles, especially in preventing loss and ensuring compliance with location-specific regulations, often requiring additional aftermarket solutions and equipment.

Innovation Solution

A vehicle inventory system utilizing existing passive entry/passive start (PEPS) components, including antennas and RFID tags, to track items within vehicles by transmitting low-frequency challenges and receiving high-frequency responses, with a controller managing item data and applying rules for location-specific compliance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If additional aftermarket inventory tracking equipment is installed in vehicles, then item tracking capability is improved, but device complexity and cost increase

Engineering Contradiction:

Improveitem tracking capabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent makes the existing PEPS system perform dual functions: traditional passive entry authentication and inventory tracking. The same antennas and controllers used for key fob authentication are repurposed to detect RFID tags on items, eliminating the need for separate tracking hardware and reducing system complexity while maintaining reliable tracking capability

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention merges the inventory tracking function with the existing passive entry system by integrating RFID tag detection capabilities into the PEPS controller and antennas. This consolidation combines two previously separate systems into one unified system, reducing overall device complexity and eliminating redundant components

Inventive Principle:

Principle #5Merging (Combining)

2Measurement precision

If specialized inventory tracking systems are implemented, then tracking precision is improved, but ease of manufacture deteriorates

Engineering Contradiction:

Improveitem detection accuracyVSAvoidsystem implementation ease

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The system leverages existing PEPS infrastructure (antennas, controllers, authentication protocols) to provide inventory tracking functionality. By using already-deployed components for their secondary purpose, the system achieves precise item detection without requiring new manufacturing processes or specialized installation procedures, thereby maintaining ease of manufacture

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The existing PEPS components are designed to serve multiple functions: authentication and inventory tracking. This multi-functionality allows the system to achieve precise item detection using standard automotive components that are already manufactured and installed, avoiding the need for specialized tracking hardware and simplifying the manufacturing and deployment process

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If existing PEPS components are utilized for inventory tracking, then device complexity is reduced, but measurement precision may worsen

Engineering Contradiction:

Improvesystem complexityVSAvoiditem detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The system employs challenge-response authentication protocols originally designed for key fob verification to detect RFID tags on items. The controller transmits low-frequency challenges and processes high-frequency responses to determine item presence and compliance with location-specific rules, providing accurate detection feedback without requiring specialized high-precision tracking hardware

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The invention replaces complex specialized tracking hardware with electromagnetic field-based RFID detection using existing PEPS antennas. This substitution achieves sufficient measurement precision for inventory tracking purposes while dramatically reducing device complexity by utilizing already-present electromagnetic communication infrastructure

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

Enables efficient and cost-effective tracking of items within vehicles, preventing loss and ensuring compliance with location-specific regulations without the need for additional aftermarket solutions, by using existing PEPS components to transmit and receive radio frequency identification signals.

Implementation Method 1

transmitting low-frequency challenges and receiving high-frequency responses

Methodology Applied

Scientific EffectElectromagnetic Induction: Electromagnetic Induction

Implementation Method 2

receiving high-frequency responses, with a controller managing item data and applying rules for location-specific compliance

Methodology Applied

Scientific EffectElectromagnetic Radiation:

Data Source

PatentUS9836717B2Inventory tracking system classification strategy

Publication Date: 2017.12.05 FORD GLOBAL TECH LLC

AI summary

A vehicle may include a passive entry system that unlocks the vehicle upon authenticating a fob in a vicinity of the vehicle. The passive entry system further recognizes the vehicle is approaching a restrictive geographic location within which at least one proscribed item is prohibited, receives item data indicative of items located within the vehicle, and provides output indicating whether any of the items is a proscribed item for the restrictive geographic location.