Tractor Inertia Detector Layout for Accurate Auto-Steering
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Solution Overview
Problem
Existing tractor systems face challenges in accurately determining their position and orientation due to positional deviations caused by yawing, pitching, or rolling, which affect the precision of autonomous travel, especially when equipped with GPS systems and inertia measurement units.
Innovation Solution
The integration of an inertia detector adjacent to the transmission case, which supports the rear wheels and is part of an anti-vibration structure, allows for precise measurement of the tractor's inertia information, correcting for positional errors by combining GPS satellite signals with inertial data to enhance auto-steering accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the inertia detector is housed inside the control panel portion, then the device complexity is reduced, but the measurement precision deteriorates due to vibration and positional deviations
Solution Approach 1:
The inertia detector is extracted from the control panel portion and relocated to a position adjacent to the transmission case. This separation removes the detector from the vibrating control panel environment, thereby improving measurement precision while maintaining reasonable device complexity through strategic repositioning rather than complete system redesign.
Solution Approach 2:
The transmission case serves as an intermediary structure that provides a stable mounting position for the inertia detector. By positioning the detector adjacent to the transmission case rather than inside the control panel, the system uses the transmission case as a mediator to achieve better vibration isolation and measurement stability.
2Measurement precision
If the inertia detector is positioned away from the transmission case, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The inertia detector is merged with the transmission case assembly by positioning it adjacent to the transmission case. This integration allows the detector to benefit from the transmission case's structural stability and vibration isolation properties, achieving high measurement precision without requiring separate complex mounting structures or additional vibration isolation systems.
3Device complexity
If GPS antenna and inertia measurement unit are integrated in the same case, then the device complexity is reduced, but the measurement precision deteriorates due to vibration from the transmission case
Solution Approach 1:
The system is segmented into separate functional modules: the GPS antenna remains integrated with the control panel, while the inertia detector is separately positioned adjacent to the transmission case. This segmentation allows each component to be optimally positioned for its specific function, with the inertia detector isolated from transmission case vibrations while maintaining overall system integration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves the accuracy of autonomous travel by minimizing positional errors caused by vehicle attitude changes, ensuring precise navigation and operation of the tractor along scheduled paths.
Implementation Method 1
an inertia detector to measure inertia information of a vehicle body
Implementation Method 2
an anti-vibration structure to suppress vibration of the inertia detector
Data Source
AI summary
A working vehicle includes an inertia detector to measure inertia information of a vehicle body, a rear axle supporting a rear wheel, and a transmission case rotatably supporting the rear wheel. The inertia detector overlaps with at least a portion of the transmission case in a plan view and is capable of accurately measuring inertia information when a vehicle body changes attitude.