Base Station Switching for Jump-Free High-Precision Positioning
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Solution Overview
Problem
Existing satellite positioning technologies, such as RTK, face challenges in maintaining centimeter-level precision during base station switching due to inconsistencies in coordinate frames or accuracy, leading to location jumps that affect devices like unmanned aerial vehicles and agricultural machinery.
Innovation Solution
A method and device for calculating a second coordinate based on a first and second observation value from different base stations, with a determination unit to check for deviations in the third coordinate, allowing smooth positioning by using the second coordinate for location information when deviations are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base station switching is performed to maintain positioning coverage, then positioning service availability is improved, but location accuracy deteriorates due to coordinate frame inconsistencies causing jumps
Solution Approach 1:
The system performs preliminary actions by calculating predicted coordinates using the second base station's observation values and the first base station's coordinate system before the switching occurs. This predicted coordinate is then compared with the second base station's published coordinate to detect potential jumps in advance, allowing the system to prepare correction measures beforehand.
Solution Approach 2:
The system implements feedback by continuously monitoring the consistency between coordinates from different base stations. When a deviation is detected during base station switching, the system uses the calculated second coordinate (based on the first base station's reference frame) as feedback to correct the location information, ensuring accuracy is maintained after switching.
2Area of stationary object
If multiple base stations are established to provide large-range positioning, then positioning coverage area is improved, but system complexity increases due to coordinate frame alignment requirements
Solution Approach 1:
The system applies universality by establishing a unified coordinate reference frame based on the first base station that can be used across multiple base stations. This universal reference frame allows different base stations to provide positioning services without requiring complex individual coordinate transformations for each station, simplifying the overall system while expanding coverage.
Solution Approach 2:
The system changes parameters by switching the reference base station dynamically. Instead of maintaining complex transformations between multiple coordinate frames, the system changes which base station serves as the reference (first or second base station) and adjusts the coordinate calculation accordingly, simplifying the system architecture while maintaining large-range coverage.
3Stability of the object's composition
If base station coordinates are fixed to ensure consistency, then location stability is improved, but adaptability to base station movements or errors deteriorates
Solution Approach 1:
The system applies dynamics by making the coordinate reference flexible rather than fixed. The system can dynamically switch between using the first base station's coordinate system and the second base station's coordinate system as the reference frame. This dynamic adaptation allows the system to maintain location stability by detecting jumps and switching references when base stations move or exhibit errors.
Solution Approach 2:
The system implements self-service by automatically detecting coordinate inconsistencies and correcting them without external intervention. When a jump is detected during base station switching, the system autonomously calculates corrected coordinates using the alternative reference frame and applies the correction, maintaining stability while adapting to base station changes.
Data Source
AI summary
A method includes calculating, by a mobile station, a second coordinate according to a first coordinate and a first observation value of a first base station, and a second observation value published by a second base station; and determining, according to the calculated second coordinate, whether there is a deviation in a third coordinate published by the second base station. When there is a deviation in the third coordinate, calculating location information of the mobile station according to the second coordinate and the observation value of the second base station, wherein the first coordinate and the first observation value are information used for calculating the location information of the mobile station before base station is switched. The first base station publishes the coordinate to the mobile station before base station is switched; and the second base station publishes the coordinate to the mobile station after base station is switched.