3D RTLS Tracking Nodes for Multi-Story Height Accuracy
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Solution Overview
Problem
Traditional two-dimensional tracking systems fail to accurately determine the location of objects in three-dimensional spaces, as they assume a fixed height, leading to errors when objects move vertically, such as between floors in a building, resulting in unreliable position calculations.
Innovation Solution
A real-time location system (RTLS) that determines three-dimensional locations by using tracking devices to communicate with nodes, calculating x, y, and z coordinates, including the height, through methods like probabilistic calculations and confidence factor analysis, and visualizing the results on graphical user interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional two-dimensional tracking systems are used to determine location, then the system complexity is reduced and ease of operation is improved, but measurement precision deteriorates because the systems assume fixed height and cannot accurately track objects in three-dimensional spaces
Solution Approach 1:
The patent transitions from traditional two-dimensional tracking to three-dimensional tracking by adding vertical height (z-coordinate) measurements. The system uses multiple antennas arranged in three-dimensional space to receive signals from tags, enabling calculation of precise 3D positions including elevation and floor level information, thereby resolving the limitation of fixed-height assumptions in 2D systems.
Solution Approach 2:
The tracking system is divided into discrete components: multiple distributed antennas, tag devices, signal processing modules, and location calculation engines. Each antenna independently receives signals and provides measurement data, which are then processed separately before being integrated to compute final 3D positions, allowing modular deployment and scalability.
2Reliability
If two-dimensional tracking with fixed height assumption is used, then device complexity is reduced, but reliability deteriorates when objects move vertically between floors or change height
Solution Approach 1:
By incorporating the vertical dimension into tracking calculations, the system reliably determines positions of objects at varying heights and across multiple floors. The three-dimensional coordinate system (x, y, z) captures vertical movement, eliminating the reliability issues caused by fixed-height assumptions in 2D systems.
Solution Approach 2:
The system dynamically adapts to changing vertical positions of tracked objects. Rather than assuming a fixed height plane, the 3D tracking system continuously calculates positions at varying z-coordinates, allowing reliable tracking whether objects are on different floors, at different heights on the same floor, or moving vertically between levels.
3Measurement precision
If three-dimensional location tracking is implemented, then measurement precision and reliability are improved, but device complexity increases due to multiple tracking devices and computational requirements
Solution Approach 1:
The antenna array serves multiple functions simultaneously: it performs both 2D horizontal positioning and 3D vertical positioning, detects tags at various heights and locations, and provides redundant measurements for improved accuracy. This multi-functionality reduces the need for separate specialized devices for different tracking dimensions.
Solution Approach 2:
The system merges the functionality of multiple distributed antennas into a unified three-dimensional tracking network. By combining signals from multiple antenna elements and integrating their measurements, the system achieves accurate 3D position estimation without requiring separate dedicated devices for each spatial dimension, thereby managing complexity through functional integration.
Data Source
AI summary
A real time location system (RTLS) is provided for determining three-dimensional locations of nodes in an environment. The RTLS system includes at least one node associated with an asset in the environment. The at least one node has an unknown location. The system further includes at least one tracking device that communicates with the at least one node to obtain location data associated with the unknown location of the at least one node. A location module receives the location data associated with the unknown location of the at least one node and determines a real-time three-dimensional current location of the at least one node based on the location data. The real-time three-dimensional current location having x, y and z coordinates and the z coordinate indicates a height of the at least one node in the environment.