Spatial Coordinate Positioning System Using Laser Ranging
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Solution Overview
Problem
Current satellite navigation systems, such as GPS, face challenges in achieving high-precision position measurement for automated driving systems, with GPS errors approximating several meters, and the scalability and cost of installing ground base point stations limit the practical implementation of high-precision spatial information measurement support systems.
Innovation Solution
A spatial coordinate positioning system utilizing a ground base point station with a wireless distance measurement function and multiple assistant point stations with wireless and laser distance measurement capabilities, where an assistant point position calculation server calculates the spatial coordinates of assistant point stations based on distance information between them and the ground base point station, enabling high-precision positioning without requiring extensive ground base point station installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ground base point stations are installed at a predetermined interval nationwide to secure visible distance from national reference point, then positioning precision is improved, but installation cost and construction time increase significantly
Solution Approach 1:
The system divides the positioning network into hierarchical segments: national reference points (sparsely distributed) and local ground base point stations (densely distributed). Each segment serves a specific function - reference points provide absolute coordinate framework while local stations provide dense measurement coverage. This segmentation allows achieving high positioning precision without requiring dense national reference point installation.
Solution Approach 2:
The patent introduces assistant point stations as intermediary elements between ground base point stations and positioning targets. These assistant stations relay measurement information and enable indirect positioning measurements, extending the effective coverage area of each ground base point station without requiring direct line-of-sight to every target location.
2Measurement precision
If ground base point stations are installed at a predetermined interval to ensure coverage, then positioning accuracy is improved, but maintenance cost and time increase
Solution Approach 1:
The system implements self-calibration mechanisms where assistant point stations automatically perform mutual measurements with neighboring stations to maintain coordinate accuracy. The automated data collection and processing systems continuously monitor and adjust positioning parameters without requiring manual intervention, reducing maintenance time and costs while maintaining high positioning accuracy.
3Device complexity
If GPS is used for position measurement, then system simplicity is maintained, but positioning precision deteriorates to several meters error
Solution Approach 1:
The patent replaces satellite-based electromagnetic positioning (GPS) with ground-based laser ranging technology. Laser modules emit and detect laser beams to measure distances with centimeter-level precision, substituting the satellite signal reception mechanism with direct optical measurement. This substitution dramatically improves positioning precision from meter-level to centimeter-level accuracy.
4Adaptability or versatility
If assistant point stations are installed in large quantities to improve coverage, then positioning availability is improved, but system cost increases
Solution Approach 1:
Assistant point stations are designed as multi-functional units that simultaneously serve as: (1) positioning targets for nearby vehicles, (2) measurement reference points for neighboring assistant stations, (3) relay nodes for extending measurement coverage, and (4) calibration points for ground base point stations. This multi-functionality maximizes the utility of each installed station, improving coverage availability without proportionally increasing the number of stations required.
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 system allows for accurate and efficient high-precision spatial coordinate measurement of positioning targets, reducing installation costs and enabling scalable positioning without long-term construction, while maintaining precise position calculations even if assistant point stations deviate from their initial positions.
Implementation Method 1
a laser module which includes a light source emitting laser and a light receiving portion detecting reflected laser
Implementation Method 2
a distance measurement portion which calculates ultra-precise distance information with other ground base point stations or assistant point stations on the basis of time information related to the emission and detection of laser
Data Source
AI summary
The present invention relates to a spatial coordinate positioning system, particularly to a spatial coordinate positioning system which is capable of measuring a position of spatial positioning target in high-precision by calculating spatial coordinates of assistant point stations at a predetermined interval on the basis of a coordinate of a ground base point station and distance information between the assistant point stations in a space where the plurality of assistant point stations are installed of which coordinates were unknown.