Hybrid Positioning Detection for Working Machine Turning Accuracy
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Solution Overview
Problem
Existing positioning detection systems for working machines, such as tractors and combine harvesters, face challenges in accurately determining position and direction using satellite navigation and inertial navigation systems, especially during straight travel and turning, requiring a hybrid navigation system that integrates satellite and inertial data for precise positioning.
Innovation Solution
A positioning detection device that includes first, second, and third obtaining circuits to gather satellite signals, inertial device signals, and traveling state information, with corresponding calculators to calculate positioning information using satellite, inertial, and hybrid navigation systems, and an output circuit to provide accurate positioning data based on the vehicle's state, allowing for autonomous navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If satellite navigation system is used for positioning, then positioning information can be obtained, but positioning accuracy deteriorates during turning operations
Solution Approach 1:
The patent combines satellite navigation system and inertial navigation system into a hybrid navigation system. The satellite navigation calculator receives satellite signals and calculates positioning information, while the inertial navigation calculator uses detection signals from inertial devices (gyroscopes, accelerometers) to calculate positioning information. Both calculation results are integrated to provide reliable positioning during both straight travel and turning operations, resolving the contradiction between positioning accuracy and reliability during turning.
2Reliability
If inertial navigation system is used for positioning, then positioning information can be obtained during turning, but accumulated errors increase over time
Solution Approach 1:
The hybrid navigation system merges satellite navigation and inertial navigation. The satellite navigation provides absolute positioning references that correct accumulated errors from the inertial navigation system over time, while the inertial navigation provides continuous positioning data during turning when satellite signals may be insufficient. This combination resolves the contradiction between reliability during turning and accuracy over time.
3Measurement precision
If hybrid navigation system is used for all operations, then positioning accuracy is improved, but calculation complexity increases
Solution Approach 1:
The navigation system is segmented into distinct functional modules: a satellite navigation calculator for processing satellite signals, an inertial navigation calculator for processing inertial device signals, and a hybrid navigation calculator for integrating both. The determination unit selectively activates appropriate calculators based on vehicle operation state (straight travel or turning), reducing unnecessary calculations and simplifying system operation while maintaining high positioning accuracy when needed.
4Productivity
If selective calculation mode is used based on traveling state, then calculation efficiency is improved, but positioning continuity may be affected
Solution Approach 1:
The system dynamically adjusts its calculation mode based on the determined traveling state. The determination unit continuously monitors vehicle state and switches between different calculation strategies: using satellite navigation during straight travel for efficiency, and employing hybrid navigation during turning for accuracy. This dynamic adaptation maintains positioning continuity and reliability while optimizing calculation efficiency for different operational conditions.
Data Source
AI summary
A positioning detection device includes a first obtaining circuit to obtain a satellite signal, a second obtaining circuit to obtain a detection signal of an inertial device, a third obtaining circuit to obtain a traveling state of the vehicle body including straight-traveling and turning of the vehicle body, a first calculator to calculate first positioning information in a satellite navigation system to which the satellite signal is applied, a second calculator to calculate second positioning information in an inertial navigation system to which the detection signal is applied, a third calculator to calculate third positioning information in a hybrid navigation system to which the first positioning information and the second positioning information are applied, and an output circuit to output the third positioning information upon obtaining the straight-traveling and to output the first positioning information and/or the second positioning information upon obtaining the turning.