Railway Vehicle Positioning via 3D Range Finder and Vehicle ID
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Solution Overview
Problem
Existing positioning systems for railway vehicles have low accuracy and cannot precisely position a railway vehicle on a track section, leading to significant errors in positioning.
Innovation Solution
A three-dimensional positioning system that integrates vehicle number recognition, monitoring, and three-dimensional range finder technologies to accurately determine the railway mileage coordinate of railway vehicles by calculating the standard length and distance information of the vehicles on the track line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If track circuit positioning method is adopted, then the positioning system can be implemented, but the positioning accuracy deteriorates with a large error range
Solution Approach 1:
The positioning system is divided into multiple independent modules: vehicle number recognition module, three-dimensional range finder module, and monitoring module. Each module performs a specific function, and their results are integrated to achieve precise positioning. This segmentation allows the system to maintain high accuracy while managing complexity through modular design.
Solution Approach 2:
The patent introduces a three-dimensional range finder as an intermediary device to measure the distance between the railway vehicle and the reference point. This intermediary measurement mechanism enables precise positioning without requiring complex track circuit infrastructure, thereby improving accuracy while reducing overall system complexity.
2Measurement precision
If track circuit positioning method is adopted, then the positioning system can be implemented, but the positioning error increases
Solution Approach 1:
The patent replaces the traditional mechanical track circuit positioning system with an optical/electromagnetic-based system using vehicle number recognition and three-dimensional range finding. This substitution eliminates the limitations of track circuit positioning, providing precise positioning information without the inherent errors and information loss of the mechanical system.
Solution Approach 2:
The system changes the measurement parameters from track circuit-based electrical signals to optical distance measurement and vehicle number recognition. By changing the fundamental measurement parameters, the system achieves higher precision and eliminates the positioning errors associated with traditional track circuit methods.
3Measurement precision
If three-dimensional range finder is provided at both ends of track line, then positioning accuracy is improved, but system cost and complexity increase
Solution Approach 1:
The three-dimensional range finder is designed to serve multiple functions: measuring distance to the railway vehicle, determining vehicle position, and providing reference data for positioning calculations. By making the device multi-functional, the system achieves high positioning accuracy without requiring additional specialized equipment at both ends of the track line, thereby reducing overall system complexity.
Solution Approach 2:
The patent introduces a vertical dimension by placing the three-dimensional range finder above the track line rather than only at the ends. This spatial reconfiguration allows the single device to measure distances and determine positions more effectively, achieving high accuracy without duplicating equipment at both ends of the track line.
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 significantly improves positioning accuracy, allows for precise positioning of railway vehicles on all track lines with reduced costs and system complexity, and maintains accuracy even when railway trains are separated into multiple units.
Implementation Method 1
a three-dimensional range finder, used for obtaining distance information of an object to be positioned stopping on each track line
Data Source
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AI summary
Disclosed is a three-dimensional positioning system for a railway vehicle, wherein the system is applied to a railway station, and the system comprises: a vehicle number recognition sub-system used for sending vehicle information of each railway vehicle to a monitoring sub-system; a three-dimensional range finder used for obtaining distance information of an object to be positioned stopping on each track line, and sending the distance information to the monitoring sub-system; and the monitoring sub-system used, for each track line, for using information to be monitored corresponding to the track line to determine a standard length of the object to be positioned stopping on the track line, and based on the standard length and the distance information of the object to be positioned on the track line, calculating a railway mileage coordinate of the object to be positioned on the track line, wherein the information to be monitored corresponding to the track line is obtained by means of integrating various pieces of vehicle information, in the vehicle information, which are detected at the same time and have the number of the track line. Application of the embodiment of the present invention improves precision in positioning the object to be positioned.