Train Preceding Identification via Onboard Controller Sorting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional CBTC systems rely on ground control for centralized management, leading to communication delays and errors in train position identification and adjacency relations, which hampers efficient and flexible train operation.
Innovation Solution
A preceding train identification method where a vehicle on board controller communicates with an object controller to acquire ID and position information of all trains within its jurisdiction, sorts this information using axle counter data to identify the adjacent preceding train, enabling autonomous train control and reducing dependence on trackside equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ground control is used as the mainstay for centralized train management, then train operation control can be achieved, but communication delay and accumulated error occur in train position identification and adjacency relation
Solution Approach 1:
The patent divides the centralized ground control system into distributed train-based control units. Each train is equipped with a controller that independently performs positioning and adjacency determination, segmenting the central control function into multiple autonomous nodes that operate independently, thereby eliminating communication delays associated with centralized control.
Solution Approach 2:
The patent combines the functions of position reporting, adjacency determination, and movement authorization calculation into a single integrated process executed by each train's controller. This merging of functions eliminates the need for separate communication cycles for each function, reducing overall communication delay and accumulated error.
2Loss of time
If decentralized control taking autonomous control of the train as the core is implemented, then communication delay is reduced, but the train needs to know the running of adjacent trains on the route to achieve tracking operation
Solution Approach 1:
The patent implements preliminary action by having each train controller proactively identify adjacent trains and determine adjacency relations before movement authorization is needed. The controller continuously monitors and updates the adjacency matrix in advance, so that when tracking operation is required, the information is already available, eliminating the need for complex real-time queries.
Solution Approach 2:
The patent uses copying by creating and maintaining a local copy of the adjacency matrix and train position information in each train's controller. Instead of requiring trains to query central systems or other trains for this information, each controller maintains an up-to-date local copy, simplifying the information access process and reducing communication overhead.
3Productivity
If train-ground information interaction is achieved by continuous two-way wireless communication, then tracking operation can be achieved, but accumulated error is generated from information transmission
Solution Approach 1:
The patent implements self-service by enabling each train to autonomously determine its own position and adjacency relations using local sensors and processors, without relying on continuous ground-based communication for position verification. The train's controller independently calculates movement authorization based on locally acquired position information, eliminating accumulated errors from repeated train-ground communication cycles.
Solution Approach 2:
The patent uses feedback by having each train controller continuously monitor its own position, speed, and the positions of adjacent trains, and use this feedback to dynamically adjust movement authorization calculations. The system incorporates feedback loops that verify position information consistency and correct deviations, maintaining high measurement precision without requiring continuous ground validation.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6B
AI summary
A preceding train identification method based on an object controller, includes: carrying out communication interaction, by a vehicle on board controller of a train, with the OC to acquire the ID information of all running trains within the jurisdiction of the OC, before the train enters the jurisdiction of the OC； communicating, by the vehicle on board controller, with the train corresponding to each piece of ID information according to the ID information of all running trains to acquire the position information of the train corresponding to each piece of ID information；and sorting, by the vehicle on board controller, the position information of the trains corresponding to all ID information in an axle counter sorting manner to identify the ID information of an adjacent preceding train of a present train. A vehicle on board controller and a train are also provided. By adopting the method of the present disclosure, preceding train information necessary for a present train can be screened out from online train information quickly and effectively.