LoRa ToF Ranging for Long-Range Object Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Long-range tracking of moving objects in GPS-denied environments is challenging due to the limited range and accuracy of existing wireless technologies, which require an excessive number of anchor points for effective triangulation.
Innovation Solution
A location system utilizing multiple master nodes at the corners of a coverage area, with at least two nodes on one edge receiving signals from a slave node to calculate its location within the area, employing LoRa transceivers with ranging capabilities and time-of-flight functions for accurate positioning, even in irregularly shaped areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wireless technologies with short range are used for tracking, then device complexity is reduced, but tracking range and accuracy deteriorate
Solution Approach 1:
The patent changes the operational parameters of wireless communication by using Time-of-Flight (ToF) measurement capability in LoRa transceivers. This allows the system to determine distance based on signal propagation time rather than relying on signal strength alone, enabling accurate long-range tracking with fewer anchor points. The ToF parameter transformation converts a traditional short-range RSSI-based system into a long-range accurate ranging system.
2Measurement precision
If more anchor points are deployed to improve triangulation accuracy, then location precision improves, but device complexity and deployment cost increase
Solution Approach 1:
The patent replaces the mechanical approach of deploying numerous physical anchor points with a signal-processing-based solution. By using ToF measurements from minimal anchor points and applying trilateration algorithms, the system achieves high location accuracy without the need for dense anchor point deployment. The mechanical deployment complexity is substituted with computational processing.
3Ease of manufacture
If traditional triangulation methods are used with limited anchor points, then deployment is simpler, but location accuracy and reliability deteriorate
Solution Approach 1:
The patent introduces Time-of-Flight measurement as an intermediary mechanism between the anchor points and the tracking algorithm. This intermediary provides precise distance measurements that enable accurate trilateration even with minimal anchor points, bridging the gap between simple deployment and high accuracy requirements.
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 accurate and reliable tracking of objects within the coverage area, improving range and accuracy while minimizing the number of required anchor points, suitable for various applications including military and IoT devices.
Implementation Method 1
employing LoRa transceivers with ranging capabilities and time-of-flight functions for accurate positioning
Data Source
AI summary
A location system includes multiple master nodes located at corners of a coverage area. At least two master nodes are located on one edge of the coverage area and receive signals from a slave node within the coverage area. The at least two master nodes calculate a distance to the slave node and a location of the slave node within the coverage area.