Trailer Asset Tracker Association Using Tripwire Location Reporting
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Solution Overview
Problem
Current telematics systems face challenges in accurately determining when a tractor and trailer are traveling together, especially in scenarios where the trailer is engineless, as existing methods consume excessive energy and are inefficient in detecting motion and location changes.
Innovation Solution
An asset tracker is deployed in the trailer, operating in low-power mode and transitioning to tripwire detection and location reporting modes to conserve energy while accurately determining crossing of virtual tripwires, thereby sending frequent location updates to a telematics server for synchronization with the tractor's location data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the asset tracker continuously monitors location and sends frequent updates, then location reporting precision is improved, but energy consumption increases
Solution Approach 1:
The asset tracker dynamically adjusts its operational mode based on detected motion states. When motion is detected, the system transitions from low-power mode to tripwire detection mode, and when tripwires are crossed, it switches to location reporting mode. This dynamic adaptation allows the system to maintain location reporting precision when needed while conserving energy during stationary periods.
Solution Approach 2:
The system implements periodic location reporting only when specific conditions are met (tripwire crossing events). Instead of continuous monitoring, the asset tracker sends location updates periodically triggered by motion detection and tripwire crossing events, thereby maintaining precision for critical events while reducing overall energy consumption.
2Measurement precision
If the asset tracker operates in tripwire detection mode with frequent location determination, then detection accuracy is improved, but energy consumption increases
Solution Approach 1:
The system dynamically transitions between operational modes based on detected conditions. The asset tracker remains in low-power mode until motion is detected, then switches to tripwire detection mode for enhanced accuracy during motion events, and returns to low-power mode when stationary. This dynamic switching maintains detection accuracy during critical events while minimizing energy consumption during idle periods.
3Measurement precision
If the asset tracker sends frequent location updates to the telematics server, then association determination accuracy is improved, but communication energy consumption increases
Solution Approach 1:
The asset tracker implements periodic location updates triggered by specific events (tripwire crossings) rather than continuous communication. Location data is sent to the telematics server periodically when motion events occur and tripwires are crossed, maintaining association determination accuracy for critical events while significantly reducing communication energy consumption during stationary periods.
4Measurement precision
If the asset tracker uses motion detection to trigger mode changes, then motion detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical motion detection systems with electronic accelerometer-based detection. The accelerometer electronically senses motion and triggers mode changes through software logic, achieving high motion detection accuracy while maintaining relatively simple device architecture compared to mechanical sensing systems.
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
This approach enables efficient energy management and accurate determination of the trailer's association with the tractor, reducing the risk of towing the wrong trailer by minimizing energy consumption and enhancing location reporting precision.
Implementation Method 1
Detecting the travel motion of the asset tracker may comprise detecting a plurality of acceleration values from a 3-axis accelerometer thereof
Data Source
AI summary
An asset tracker deployed in an engineless vehicle and a telematics device coupled to a vehicle both send location updates to a telematics server. The asset tracker sends location updates at a faster rate upon leaving a shipping yard, for example. The telematics server associates the vehicle and engineless vehicles, determines whether they are travelling together, and sends a notification when they are not supposed to be travelling together.