Wireless Flagging System for Locomotive Speed Control
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Solution Overview
Problem
In situations where the warning system at a railroad crossing malfunctions, manual entry of flagger numbers by train operators can lead to incorrect speed settings, posing safety risks as the locomotive may travel at unsafe or unauthorized speeds.
Innovation Solution
Implementing a wireless system where flaggers at the railroad crossing wear devices that communicate with the locomotive's controller, indicating whether it is safe for the locomotive to pass through, allowing the controller to adjust speed based on the number of flaggers present and preventing passage if it is not safe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual entry of flagger numbers by train operator is used, then the system is simple to operate, but the reliability of speed control deteriorates due to potential incorrect entry
Solution Approach 1:
The patent replaces the manual mechanical entry system with an automated wireless communication system. Portable transmitters worn by flaggers automatically communicate the number of flaggers to the locomotive controller via wireless transmission, eliminating the need for manual entry by the train operator while ensuring accurate and reliable speed control based on the actual number of flaggers present.
2Reliability
If wireless devices are worn by flaggers, then the reliability of flagger count detection is improved, but the device complexity increases
Solution Approach 1:
The portable transmitters worn by flaggers automatically perform the function of communicating flagger count without requiring active operation by the flaggers. The devices self-activate and automatically transmit their presence and identification to the locomotive controller, eliminating the need for manual counting or complex user interaction while maintaining high reliability.
Solution Approach 2:
The wireless communication system serves multiple functions: it identifies the number of flaggers, communicates their presence to the locomotive, and enables automatic speed control. This multi-functional approach consolidates what could be multiple separate systems into a single integrated solution, reducing overall complexity despite the advanced technology involved.
Data Source
AI summary
A vehicle control system and method wirelessly communicate from at least one wireless transmitter positioned proximate a route crossing to a wireless receiver of a vehicle via a wireless wayside transceiver. The system and method communicate an indication of whether the route crossing is clear for passage of the vehicle through the route crossing. The system and method receive the indication by the wireless transmitter and using the vehicle receiver. A vehicle controller or an operator of the vehicle can determine whether it is safe for the vehicle to travel through the route crossing based on the indication received by the vehicle receiver from the portable transmitter. The vehicle can then be operated based on the determination.