Beacon-Activated Wireless Transmitter for Aircraft Cargo

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Solution Overview

Problem

Existing wireless asset tracking systems face challenges in complying with regulations that restrict RF transmissions in secure environments, such as airports, and require frequent battery maintenance due to continuous operation, leading to inefficiencies and safety concerns.

Innovation Solution

A wireless tracking system with a transmitter device equipped with motion and vision sensors, which automatically deactivates during restricted environments and uses a beacon-based activation mechanism, eliminating the need for lithium-based batteries and reducing power consumption, thereby ensuring compliance with FAA regulations and enhancing safety and operational efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the transmitter device operates continuously to track assets, then tracking reliability is improved, but energy consumption increases and battery maintenance frequency increases

Engineering Contradiction:

Improvetracking reliabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The transmitter device operates in periodic cycles, alternating between listening mode and transmission mode. The device listens for beacon signals from routers, and only activates transmission when needed, rather than operating continuously. This periodic operation significantly reduces energy consumption while maintaining tracking reliability through event-driven updates.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system uses environmental infrastructure (routers with beacon signals) to trigger transmitter activation. Instead of the transmitter continuously searching for routers, the routers actively broadcast beacons that automatically wake and activate nearby transmitters, making the system self-organizing and energy-efficient.

Inventive Principle:

Principle #25Self-service

2Measurement precision

If the transmitter device transmits RF signals continuously, then tracking accuracy is improved, but compliance with FAA regulations deteriorates in restricted environments

Engineering Contradiction:

Improvetracking accuracyVSAvoidRF interference

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The transmitter device continuously listens for beacon signals from routers and uses this feedback to determine when to activate or deactivate transmission. The device only transmits when it detects and correctly decodes a beacon signal, automatically adapting to restricted environments where routers may not be present or where transmission is prohibited, thus maintaining compliance while preserving tracking accuracy where permitted.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The transmitter device dynamically adjusts its operational state based on environmental conditions. It transitions between listening mode and transmission mode depending on the presence of valid beacon signals, allowing the system to adapt to different regulatory environments (FAA restricted vs. non-restricted areas) without manual intervention.

Inventive Principle:

Principle #15Dynamics

3Productivity

If the transmitter device is activated in all locations, then tracking coverage is improved, but safety concerns increase in secure environments

Engineering Contradiction:

Improvetracking coverageVSAvoidsafety concerns

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

Routers act as intermediary devices that mediate between the transmitter and restricted environments. The router broadcasts beacon signals that serve as a safe intermediary communication method, allowing the transmitter to know when it's in a permitted zone without directly transmitting RF signals into restricted areas. This intermediary mechanism enables tracking coverage while maintaining safety compliance.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Use of energy by moving object

If lithium-based batteries are used in the transmitter device, then power density is improved, but safety concerns and operational complexity increase

Engineering Contradiction:

Improvepower densityVSAvoidsafety concerns

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The system replaces expensive, safety-concerned lithium-based batteries with simpler, non-lithium battery alternatives. While these alternative batteries may have lower power density, the periodic operation mode compensates by significantly reducing overall power consumption, making the less powerful but safer batteries sufficient for the application.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The system changes the operational parameters of the transmitter, specifically the duty cycle and activation frequency, to match the reduced power output of non-lithium batteries. By optimizing the listening/transmission cycle duration and intensity, the system achieves effective tracking coverage using safer, lower-power-density battery technology.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9064225B2Method and apparatus for asset tracking in constrained environments

Publication Date: 2015.06.23 ROAMBEE CORP

AI summary

Wireless tracking systems and devices to detect the status of cargo containers, such as aircraft cargo. The system has a transmitter device, a router, and intelligent software. The transmitter device has automatic on-off capability during use, without the need for human intervention. The transmitter device has a basic “listening state” and the router has a basic “beacon broadcast state.” Only when the transmitter device is within range of the router's beacon does the device transmit data via RF signal to the router.