Beidou Train Positioning With Track Map Matching

Solution Overview

Problem

Existing train positioning methods require numerous ground devices, leading to high construction and maintenance costs, and limit operational efficiency, especially in determining the initial train position.

Innovation Solution

A Beidou satellite-based initial train positioning calculation method that utilizes satellite signals and electronic maps to determine the train's position without additional ground devices, employing single and non-single track comparison algorithms to enhance accuracy and efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional transponder-based initial train positioning is used, then positioning can be achieved, but construction cost and maintenance cost increase significantly

Engineering Contradiction:

Improvepositioning reliabilityVSAvoidground device quantity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical transponder-based positioning system with a satellite-based navigation system. Instead of using ground-based transponders and track circuits, the system uses Beidou satellite signals to determine train position, thereby eliminating the need for complex ground infrastructure and reducing both construction and maintenance costs.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent applies universal positioning technology (satellite navigation) that can work across the entire railway network without requiring dedicated ground devices for each location. The satellite system provides positioning services universally, eliminating the need for multiple specialized ground-based positioning installations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If traditional transponder-based positioning is used, then positioning can be achieved, but maintenance difficulty increases

Engineering Contradiction:

Improvepositioning reliabilityVSAvoidmaintenance difficulty

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The patent replaces the mechanical transponder-based positioning system with a satellite-based navigation system. Instead of using ground-based transponders and track circuits, the system uses Beidou satellite signals to determine train position, thereby eliminating the need for complex ground infrastructure and reducing both construction and maintenance costs.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If traditional positioning methods are used, then positioning can be achieved, but train operation efficiency is limited

Engineering Contradiction:

Improvepositioning reliabilityVSAvoidtrain operation efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent replaces the mechanical transponder-based positioning system with a satellite-based navigation system. Instead of using ground-based transponders and track circuits, the system uses Beidou satellite signals to determine train position, thereby eliminating the need for complex ground infrastructure and reducing both construction and maintenance costs.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent performs preliminary positioning actions by calculating the train's initial position before the train actually moves. The system uses satellite navigation to determine the position at the starting point, which is then used for subsequent positioning operations, thereby improving overall operational efficiency.

Inventive Principle:

Principle #10Preliminary action

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

Enables precise train positioning without additional infrastructure, reducing costs and improving operational efficiency by leveraging existing devices and satellite technology.

Implementation Method 1

receiving Beidou satellite signals to obtain Beidou navigation data

Methodology Applied

Scientific EffectSatellite signal reception:

Implementation Method 2

performing a map matching algorithm on the current Beidou navigation data and Tx, and according to the map matching result, generating a track-based one-dimensional train position

Methodology Applied

Scientific EffectMap matching:

Data Source

PatentUS12625279B2Beidou satellite-based initial train positioning calculation method and positioning system

Publication Date: 2026.05.12 CASCO SIGNAL LTD

AI summary

The present disclosure provides a Beidou satellite-based initial train positioning calculation method, and a positioning system. The initial train positioning calculation method includes the following operations: S1: receiving Beidou satellite signals to obtain Beidou navigation data, and verifying the validity of the data; S2: obtaining a track electronic map file, and verifying the validity of the file; S3: based on the Beidou navigation data and the track electronic map file, screening out possible track sections of the current position of the train as candidate track sections, and putting the candidate track sections into a set TrackList; S4: determining whether the number of the candidate track sections in the TrackList is 1; and S5: according to the determination result, selecting to execute a single track position comparison algorithm or a non-single track position comparison algorithm.