Active Logistical Tag for Aviation Cargo Tracking
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Solution Overview
Problem
Current RFID tag systems fail to meet the unique demands of tracking and tracing Unit Loading Devices (ULDs) and aluminum pallets in aviation environments, requiring extended battery life, mechanical protection, multiple pallet identification, direction of flow determination, and efficient power management without obstructing the pallet profile or altering its structural integrity.
Innovation Solution
An active logistical tag with a housing compatible for attachment to cargo, featuring a controller with an electromagnetic radiation sensor, motion sensor, and magnetic reed switch, which manages power consumption and transmits logistical information in response to sensed prompts, allowing for beaconing at predefined intervals and minimizing power usage by disabling low-frequency frequency circuitry when not in motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous transmission is used for tracking, then tracking accuracy is improved, but battery life deteriorates
Solution Approach 1:
The tag transmits data periodically at predefined intervals rather than continuously, enabling battery life extension while maintaining adequate tracking accuracy for logistics applications
Solution Approach 2:
The system uses magnetic reed switches and motion sensors to detect specific conditions (magnetic field presence, motion events) that trigger transmission only when needed, optimizing the balance between tracking accuracy and power consumption
2Difficulty of detecting and measuring
If low-frequency circuitry is always active for sensing, then detection capability is improved, but power consumption increases
Solution Approach 1:
The low-frequency circuitry is dynamically activated only when motion is detected by the motion sensor or when specific sensing conditions are met, rather than remaining constantly active, thereby reducing overall power consumption while maintaining detection capability
Solution Approach 2:
The system replaces continuous electronic monitoring with event-triggered sensing using motion sensors and magnetic reed switches, activating the low-frequency circuitry only when physical events occur
3Loss of information
If tag transmission is enabled onboard aircraft, then tracking coverage is improved, but interference with aircraft systems may occur
Solution Approach 1:
The tag transmission functionality is extracted and disabled in the specific environment of onboard aircraft, while remaining active in other logistics environments such as warehouses and ground transport, thus avoiding interference while maintaining tracking coverage where safe
4Quantity of substance
If multiple pallets are stacked for space efficiency, then storage density is improved, but tag identification becomes more difficult
Solution Approach 1:
The tag system is designed to be universally readable from multiple angles and positions, with omnidirectional antenna patterns and multiple sensing modalities (RFID, motion sensors, magnetic reed switches) that enable identification of stacked pallets regardless of their position in the stack
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 extends battery life, enables efficient tracking and tracing of ULDs and pallets during storage and transport, maintains structural integrity, and allows for accurate identification even when stacked, while avoiding unnecessary transmission on aircraft, thus meeting the stringent requirements of the aviation logistics environment.
Implementation Method 1
an electromagnetic radiation sensor comprising an amplifier and adapted to sense logistical prompts due to incident electromagnetic radiation
Implementation Method 2
a motion sensor adapted to sense logistical prompts due to motion of the tag
Implementation Method 3
a magnetic reed switch adapted to sense logistical prompts due to the tag being within a static magnetic field
Implementation Method 4
a transmitter section in communication with the controller and adapted to transmit logistical information in response to said logistical prompts sensed by the electromagnetic radiation sensor
Data Source
Figure 1~2
Figure 3
AI summary
An active logistical tag for cooperation with cargo elements, said tag comprising: a housing compatible for attachment of said tag to said cargo; a sensor suite for sensing logistical prompts, said prompts including at least one of motion, static magnetic fields and incident electromagnetic radiation; and a transmitter coupled to said sensor suite, for communicating logistical information in response to said logistical prompts.