UWB Base Station Initialization via Unified Coordinate System
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Solution Overview
Problem
UWB positioning systems face challenges in different rooms due to poor signal penetration and high requirements for line-of-sight propagation, leading to complex positioning algorithms and the need for multiple initial attitude calibrations, which affects user experience and accuracy.
Innovation Solution
A method for initializing a newly added base station in a UWB system that establishes a unified navigation coordinate system across rooms, allowing for simplified positioning algorithms and reduced need for initial attitude calibrations by using a third electronic device to measure coordinates and attitude information across areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If independent UWB systems are established in different rooms, then positioning service can be provided in each room, but positioning algorithm complexity increases and multiple initial attitude calibrations are required
Solution Approach 1:
The patent merges multiple independent UWB systems into a unified positioning system by establishing coordinate transformation relationships between different rooms. The first electronic device (in first room) and second electronic device (in second room) are integrated into the same positioning framework, allowing centralized coordinate management and eliminating the need for separate positioning algorithms in each room.
Solution Approach 2:
The third electronic device serves as an intermediary to establish the coordinate transformation relationship between the first and second electronic devices. By carrying the first electronic device from the first room to the second room and performing measurements, it mediates the coordination between different rooms, enabling unified positioning without requiring complex independent algorithms in each room.
2Reliability
If independent UWB systems are established in different rooms, then positioning service can be provided in each room, but multiple initial attitude calibrations are required when switching rooms
Solution Approach 1:
The patent combines the positioning systems of different rooms into a unified system with a common coordinate framework. This integration eliminates the need for repeated initial attitude calibrations when switching between rooms, as the attitude calibration is performed once in the unified system rather than separately in each room.
Solution Approach 2:
The initial attitude calibration is performed preliminarily when the third electronic device carries the first electronic device to the second room. This preliminary calibration establishes the coordinate transformation relationship in advance, so that subsequent positioning operations in different rooms do not require repeated calibrations, saving time during actual positioning tasks.
3Measurement precision
If UWB base station is disposed in one room, then positioning can be implemented in that room, but positioning accuracy deteriorates when measuring locations in other rooms due to poor signal penetration
Solution Approach 1:
The patent segments the positioning function by deploying multiple UWB base stations (first electronic device in first room, second electronic device in second room) in different locations. Each base station independently provides accurate positioning in its local room, while the coordinate transformation system integrates these segmented positioning results into a unified multi-room positioning framework, maintaining accuracy in each room while extending coverage.
Solution Approach 2:
The patent adds a spatial dimension to the positioning system by establishing three-dimensional coordinate transformation relationships between different rooms. Instead of attempting single-room positioning with poor penetration, the system creates a multi-dimensional positioning framework where each room has its own accurate local coordinates that are transformed into a unified global coordinate system, maintaining positioning accuracy across multiple spatial dimensions.
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 improves positioning accuracy and user experience by reducing the complexity of positioning algorithms and eliminating the need for multiple initial attitude calibrations when switching between rooms, while also simplifying the storage and calculation requirements for UWB tags.
Implementation Method 1
a UWB module configured to send a signal to another electronic device, to measure a distance between the two electronic devices
Implementation Method 2
a IMU module configured to measure motion data of the third electronic device
Data Source
AI summary
A method includes a device in an area 1 that requests a ultra-wideband (UWB) base station in the area 1 to measure an initial position, and starts inertial measurement unit (IMU) measurement. The device moves to an area 2, and the device requests to measure distances between each UWB base station in the area 2 and at least three locations. The device returns to the area 1, and requests the UWB base station in the area 1 to measure an end point position. The device corrects coordinates of the device in the area 2 calculated using data obtained through the IMU measurement based on the measured end point position. Calculate the coordinates of each UWB base station in the area 2 based on the corrected coordinates in the area 2 and the measured distances between each UWB base station and the device in the area2.