Work Vehicle Positioning with Flexible Reference Station Setup
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Solution Overview
Problem
Conventional work-vehicle position measurement systems require a reference station to be constantly placed at a precisely ascertained position for high accuracy, which can be cumbersome and prone to errors if not correctly positioned, especially when working in multiple fields.
Innovation Solution
A work-vehicle position measurement system that includes a reference station capable of being placed at any appropriate position, with a position calculation unit using satellite and reference information to determine the work vehicle's position, a travel control unit to manage travel along predetermined routes, and a data management unit to associate map data with reference station positions, enabling accurate positioning and efficient travel planning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the reference station is constantly placed at a preliminarily ascertained position, then positioning accuracy is improved, but operation complexity increases and errors occur when working in multiple fields
Solution Approach 1:
The reference station position is made dynamic rather than fixed. The system automatically adapts to different reference station positions by detecting satellite signals and calculating positions relative to the current reference station location, eliminating the need for constant placement at a preliminarily ascertained position while maintaining positioning accuracy
Solution Approach 2:
The work vehicle performs self-positioning by autonomously detecting satellite signals and calculating its position based on the current reference station position. This eliminates manual intervention for reference station placement and positioning calculations, reducing operation complexity while maintaining accuracy
2Ease of operation
If the reference station is placed at any appropriate position, then ease of operation is improved, but positioning accuracy deteriorates
Solution Approach 1:
The system changes the reference frame parameters dynamically. Instead of using fixed geographic coordinates, it calculates positions relative to the current reference station position, allowing the reference station to be placed anywhere while maintaining positioning accuracy through real-time parameter adaptation
Solution Approach 2:
The patent replaces the mechanical approach of physically positioning the reference station at predetermined locations with an electronic/computational approach. The system uses satellite signal processing and coordinate transformation algorithms to maintain accuracy regardless of physical reference station placement
3Ease of operation
If the reference station position is not precisely ascertained, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The system implements feedback by continuously monitoring satellite signals and comparing calculated positions with expected positions. When the reference station is placed at any position, the system detects this through satellite signal analysis and adjusts subsequent positioning calculations accordingly, eliminating the need for precise manual positioning while maintaining accuracy
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
The system allows for accurate and efficient work vehicle positioning and travel control, even when the reference station is placed incorrectly, by using satellite and reference information to manage map data and position the vehicle along predetermined routes, reducing errors and increasing operational efficiency across multiple fields.
Implementation Method 1
measure a measured position of the reference position by receiving a radio wave from a satellite
Implementation Method 2
obtain a calculated position of the work vehicle based on satellite information from the satellite and the reference information transmitted from the reference station
Data Source
AI summary
A work-vehicle position measurement system includes a reference station and a work vehicle. The reference station is provided at a reference position to measure a measured position of the reference position by receiving a radio wave from a satellite and to transmit reference information including the measured position. The work vehicle includes circuitry configured to obtain a calculated position of the work vehicle based on satellite information from the satellite and the reference information transmitted from the reference station, to control the work vehicle to travel along a predetermined travel route in a work field based on the calculated position of the work vehicle, and to manage map data of the work field to correspond to the reference information of the reference position.