Remote Locomotive Control via Intermediary Communication Units
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Solution Overview
Problem
Existing systems for remotely operating locomotives lack the capability for a remote operator to receive status information and send commands to locomotives from an off-board interface, limiting the implementation of automatic train operation (ATO) and real-time control of tractive and braking efforts.
Innovation Solution
A control system with lead communication units on-board lead locomotives and an off-board remote controller interface that enables the transmission of control commands and data between the lead and trailing consists of locomotives, allowing remote operators to monitor and control the train's operational parameters and subsystems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a remote operator uses an Internet-connected terminal to receive locomotive status information and send commands, then the adaptability and versatility of the control system is improved, but the device complexity increases due to the need for additional communication units and protocols
Solution Approach 1:
The lead communication unit and trailing communication unit are designed to perform multiple functions: they handle both data transmission for locomotive control and status monitoring, and they support multiple communication protocols including wireless protocols and Internet-connected communication. This multi-functionality allows the same hardware to serve both traditional train control needs and new remote operator capabilities, reducing the need for separate dedicated systems.
Solution Approach 2:
The lead locomotive acts as an intermediary between the remote operator's Internet-connected terminal and the trailing locomotives. The lead communication unit receives commands from the remote operator, processes them, and transmits appropriate control commands to the trailing consist lead communication unit, which then relays them to the trailing locomotives. This intermediary approach allows remote operation capability to be added without requiring direct communication infrastructure at every locomotive.
2Productivity
If the control system transmits data messages and control commands between the train and off-board remote controller interface while the rail vehicle is moving, then the productivity and operational efficiency is improved, but the reliability may be compromised due to potential communication interruptions
Solution Approach 1:
The control system implements error detection and correction mechanisms in advance of potential communication failures. Data messages transmitted between the train and remote controller interface include redundancy and validation checks that can detect and correct errors before they compromise control reliability. This preparatory error handling ensures that even during movement and potential interference, control commands are executed reliably.
Solution Approach 2:
The system establishes bidirectional communication channels that provide continuous feedback between the train control system and the remote controller interface. Control commands sent to the train are acknowledged, and status information returned to the remote operator confirms successful reception and execution. This feedback loop allows the system to detect and correct communication issues in real-time, maintaining reliability during dynamic operation.
Data Source
AI summary
A control system for operating locomotives in a train may include a first lead communication unit located on-board a lead locomotive of a lead consist in the train, an off-board remote controller interface, and a second lead communication unit located on-board a lead locomotive of a trailing consist in the train. The first lead communication unit may be configured to transmit locomotive control commands from the lead locomotive of the lead consist off-board to the off-board remote controller interface. The second lead communication unit located on-board the lead locomotive of the trailing consist in the train may be configured to receive control command signals from the off-board remote controller interface, with the control command signals corresponding to the locomotive control commands transmitted from the lead locomotive of the lead consist.