Asset Tracking Device with Inductance-Based Attachment Detection

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Solution Overview

Problem

Existing asset tracking systems fail to accurately detect the physical attachment or detachment of tracking tags to assets, leading to inaccuracies in location tracking and inefficient energy consumption.

Innovation Solution

A tracking device with an inductor that varies its inductance based on physical association with the asset, using a processor to detect inductance changes and wirelessly notify a master computing device of detachment or attachment events.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional radio signal tracking systems are used, then the location of assets can be estimated, but the system cannot detect the actual physical association status between tag and asset

Engineering Contradiction:

Improvelocation tracking accuracyVSAvoidphysical association verification

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent replaces mechanical verification methods with electromagnetic field-based inductance sensing. The inductor detects changes in its electromagnetic field caused by the presence or absence of conductive assets, enabling automatic detection of physical association status without mechanical switches or sensors.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The inductor acts as an intermediary element that mediates between the tracking device and the asset. It senses the physical association status through electromagnetic field interaction with conductive materials, translating physical presence into detectable electrical signals without direct mechanical contact.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If continuous monitoring of asset-tag association is implemented, then detachment events can be detected, but energy consumption increases

Engineering Contradiction:

Improvedetachment detection capabilityVSAvoidtracking device energy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

Instead of continuous monitoring, the system uses periodic inductance measurements triggered by specific events or time intervals. The processor monitors inductance changes and only activates wireless notification when detachment events are detected, reducing overall energy consumption while maintaining reliable detection capability.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The inductor continuously senses physical association status passively without requiring active power consumption for monitoring. The electromagnetic field sensing occurs naturally, and the processor only consumes significant energy when processing detected changes and initiating wireless notifications.

Inventive Principle:

Principle #25Self-service

3Device complexity

If manual logging methods are used for key management, then system complexity is reduced, but operational efficiency and security decrease

Engineering Contradiction:

Improvemanagement system complexityVSAvoidoperational efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The tracking device automatically detects and reports its own attachment and detachment events without requiring manual intervention. The system self-monitors its physical association status through inductance sensing and autonomously communicates status changes to the central system, eliminating manual logging while maintaining simplicity.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system implements automatic feedback loops where the tracking device continuously monitors its own status and communicates changes to the central management system. This automated feedback mechanism provides real-time visibility into asset locations and association status without adding significant system complexity.

Inventive Principle:

Principle #23Feedback

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 monitoring of physical connections between assets and tracking devices, enhancing location tracking accuracy and reducing energy consumption by detecting changes in inductance.

Implementation Method 1

an inductor having an inductance and configured to vary the inductance depending on whether the tracking device is physically associated with the asset or not

Methodology Applied

Scientific EffectInductance variation: Electromagnetic Induction

Data Source

PatentUS20250308367A1Asset tracking device and system

Publication Date: 2025.10.02 NAGRAVISION SRL

AI summary

The tracking device is configured to be physically associated with an asset and configured to wirelessly communicate with at least one master computing device. It comprises:an inductor having an inductance and configured to vary the inductance depending on whether the tracking device is physically associated with the asset or not, anda processor configured to detect an inductance variation of the inductor that is indicative of an event of physically separating the tracking device and the asset and to wirelessly notify said detected event to the master computing device.