RTK Correction Adapter for GPS Receivers
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Solution Overview
Problem
Current GPS systems face limitations in accuracy, particularly in applications requiring precision such as agriculture and surveying, due to the inherent inaccuracy of GPS signals and the complexity and cost of existing methods for obtaining Real Time Kinematic (RTK) correction data, which often involve costly subscriptions, limited range, and cumbersome hardware setups.
Innovation Solution
A plug-and-play adapter system that interfaces with a mobile device via Bluetooth and a GPS receiver via RS232, enabling the conversion and transmission of RTK correction data, allowing for improved accuracy without the need for additional power supplies or complex cabling, and providing a user-friendly, cost-effective solution for achieving sub-centimeter repeatability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional RTK correction data acquisition methods are used, then GPS accuracy can be improved, but device complexity and cost increase
Solution Approach 1:
The patent introduces a mobile device as an intermediary between the RTK correction data source and the GPS receiver. The mobile device receives RTK correction data via cellular network and wirelessly transmits it to the GPS receiver, eliminating the need for direct complex hardware connections between correction sources and receivers.
Solution Approach 2:
The patent replaces traditional mechanical/cabled RTK correction transmission systems with wireless communication. Instead of using physical cables or dedicated hardware interfaces for correction data transmission, the system uses Bluetooth wireless communication between the mobile device and GPS receiver, significantly reducing hardware complexity.
2Measurement precision
If traditional RTK correction data acquisition methods are used, then GPS accuracy can be improved, but cost increases
Solution Approach 1:
The system leverages the mobile device's existing cellular network capabilities to acquire RTK correction data, eliminating the need for dedicated expensive RTK infrastructure. The mobile device serves its own dual purpose of navigation and correction data acquisition, reducing overall system cost.
Solution Approach 2:
The mobile device performs multiple functions: it serves as a GPS receiver for navigation, an RTK correction data client for accuracy improvement, and a wireless transmitter for data communication. This multi-functionality eliminates the need for separate dedicated hardware systems, reducing overall cost.
3Ease of operation
If wireless communication is used for RTK correction data transmission, then ease of operation improves, but data transmission reliability may be affected
Solution Approach 1:
The system implements feedback mechanisms where the GPS receiver sends its status and reception quality information back to the mobile device. This allows for real-time monitoring and adjustment of the correction data transmission process, ensuring reliable data acquisition despite wireless communication variations.
Data Source
AI summary
A communications system includes a GPS receiver that receives GPS position data and GPS correction data, a mobile device having a first transceiver and an adapter coupled to the GPS receiver and having a second transceiver and a voltage regulator. The mobile device accesses RTK correction data over a cellular network using a current GPS position and processes the RTK correction data. The second transceiver of the adapter receives the RTK correction data over a wireless signal sent by the first transceiver of the mobile device. The adapter converts the RTK correction data so that the RTK correction data is receivable by a serial port on the GPS receiver that the adapter is coupled and the voltage regulator derives power from the GPS receiver to power the adapter.