Work Vehicle RTK Positioning Without Base Station Switching
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Solution Overview
Problem
Conventional RTK-GPS positioning systems experience temporary interruptions in autonomous vehicle navigation when the base station is switched while the vehicle is traveling in areas between two base stations, leading to disruptions in positioning and navigation.
Innovation Solution
A positioning device that performs first positioning using satellite signals, transmits positioning information to a base station server, acquires correction information, and maintains communication with a selected base station by continuously transmitting the same positioning information, preventing base station switching and ensuring continuous navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the base station is selected based on the current position of the moving object, then the positioning accuracy is improved, but the base station may be switched during autonomous traveling, causing positioning interruptions
Solution Approach 1:
The system determines the work start position and selects a base station in advance before autonomous traveling begins. This predetermined base station selection prevents switching during operation, ensuring continuous positioning while maintaining accuracy for the specific work area
Solution Approach 2:
Instead of dynamically selecting the closest base station during movement, the system inverts the approach by selecting the base station based on the work start position and maintaining that selection throughout the autonomous traveling process, prioritizing stability over dynamic optimization
2Speed
If the base station is switched to maintain proximity to the moving object, then the positioning speed is improved, but the autonomous traveling is interrupted due to positioning stop
Solution Approach 1:
The base station is selected in advance based on the work start position before autonomous traveling begins. This preliminary selection eliminates the need for real-time base station switching, maintaining continuous positioning and preventing interruptions to autonomous traveling operations
Solution Approach 2:
The system ensures continuous positioning by maintaining a fixed base station selection throughout the autonomous traveling process. This continuous action prevents positioning interruptions, allowing autonomous traveling to proceed without breaks and maximizing productivity
Data Source
AI summary
A first positioning processing unit executes independent positioning for calculating the position of a work vehicle on the basis of a satellite signal received from a satellite. A transmission processing unit transmits point positioning information to a base station server that selects one base station. An acquisition processing unit acquires correction information associated with the one base station from the base station server. A second positioning processing unit executes RTK positioning for calculating the current position of the work vehicle on the basis of the correction information. When the RTK positioning for the work vehicle based on first correction information associated with a first base station becomes possible, the transmission processing unit transmits, to the base station server, the point positioning information immediately before the RTK positioning becomes possible.