RTK-GNSS Error Estimation for Positioning Without RTK Corrections
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Solution Overview
Problem
RTK-GNSS positioning systems face challenges in maintaining high accuracy when base station reception information or RTK correction information is unavailable, leading to stopped automatic traveling of mobile stations and reduced work efficiency and accuracy.
Innovation Solution
An RTK-GNSS positioning system that derives error estimation information to correct mobile station reception errors without relying on RTK correction information, using a base station and mobile station with dedicated calculators to store and process satellite data for continuous and accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RTK correction information is used for positioning, then positioning accuracy is improved, but system reliability deteriorates when base station or mobile station cannot receive correction information
Solution Approach 1:
The mobile station performs preliminary actions by deriving error estimation information in advance and storing it in the storage unit. This error estimation information is prepared beforehand and can be used immediately when RTK correction information becomes unavailable, ensuring continuous positioning without interruption.
Solution Approach 2:
The patent introduces error estimation information as an intermediary element between the mobile station receiver and the positioning calculation. This intermediary derives positioning results without requiring direct RTK correction information, acting as a mediator that maintains positioning capability when the original correction path is blocked.
2Reliability
If automatic traveling stops to ensure safety, then work safety is improved, but productivity deteriorates
Solution Approach 1:
The patent ensures continuity of useful action by enabling the mobile station to continue automatic traveling even when RTK correction information is unavailable. The error estimation information allows the positioning system to maintain operation without interruption, eliminating the need to stop for safety checks while maintaining positioning accuracy.
3Measurement precision
If PPP-RTK method is adopted to maintain positioning accuracy, then measurement precision is improved, but device complexity increases due to additional receivers
Solution Approach 1:
The mobile station performs self-service by deriving its own error estimation information using its existing receiver and stored data. This self-contained approach eliminates the need for additional external receivers or complex PPP-RTK infrastructure, achieving positioning accuracy through the mobile station's own capabilities.
Solution Approach 2:
The patent extracts the essential positioning function from the complex PPP-RTK system by isolating the error estimation and correction capability. This extraction allows the mobile station to maintain positioning accuracy using only its own receiver and pre-stored error information, removing the need for additional receivers while preserving measurement precision.
Data Source
AI summary
An RTK-GNSS positioning system includes a base station including a first receiver to receive base station reception information from a satellite, a mobile station including a second receiver to receive mobile station reception information from a satellite, a first calculator configured or programmed to derive RTK correction information based on the base station reception information, a second calculator configured or programmed to derive error estimation information to correct an error of the mobile station reception information based on the RTK correction information and the mobile station reception information, and a storage to store the error estimation information.