Laser Train Direction and Speed Determination
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Solution Overview
Problem
Current grade crossing predictors lack an automated method to determine train direction and speed, relying on manual inspections and not ensuring proper activation of warning devices for trains approaching from both sides of the crossing.
Innovation Solution
A system utilizing laser devices positioned on both sides of a railroad crossing, communicating with a control unit to determine train direction and speed based on the timing of reflected laser beams, allowing for automated monitoring and diagnostic testing of crossing warning systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual inspection methods are used to monitor grade crossing predictors, then inspection can be performed with simple equipment, but automation and frequency of monitoring are limited
Solution Approach 1:
The patent replaces manual mechanical inspection methods with an automated optical measurement system using laser devices. The laser devices automatically measure train position and calculate direction and speed, eliminating the need for manual stopwatch measurements and visual observation by inspectors.
Solution Approach 2:
The system enables self-monitoring of grade crossing predictor performance by automatically determining train direction and speed. The control unit processes laser measurements and generates monitoring data without requiring external inspector intervention, allowing the system to monitor itself periodically.
2Reliability
If grade crossing predictors are inspected manually once a year, then inspection cost is low, but reliability of warning device activation cannot be ensured for both train directions
Solution Approach 1:
The system performs periodic automated monitoring of train direction and speed determinations at intervals desired by railroad companies or maintenance personnel. This periodic automation ensures reliable verification of warning device activation for both train directions without requiring continuous manual inspection.
Solution Approach 2:
The control unit processes laser measurements to determine train direction and speed, then uses this information to verify proper activation of crossing warning devices. This feedback mechanism ensures the grade crossing predictor is operating correctly by comparing actual train parameters against expected warning activation timing.
3Productivity
If laser devices are used to determine train direction and speed, then automated monitoring is enabled, but equipment cost and complexity increase
Solution Approach 1:
The laser devices serve multiple functions: measuring train position, determining train speed, and identifying train direction. This multi-functionality allows a single measurement system to perform comprehensive monitoring of grade crossing predictor performance, increasing productivity without proportionally increasing system complexity.
Solution Approach 2:
The control unit acts as an intermediary that processes raw laser measurements and converts them into meaningful train direction and speed determinations. This intermediary component simplifies the overall system architecture by centralizing the computation and decision-making logic.
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 automated and periodic monitoring of train direction and speed, enhancing the reliability of crossing warning systems by reducing the need for manual inspections and ensuring timely activation of warning devices for both approaching train directions.
Implementation Method 1
provide a laser beam towards a location on a railroad track and being adapted to provide one or more outputs when the laser beam is reflected back by a train traversing the track
Data Source
AI summary
System and methods for determining train direction and speed using laser measurements. The speed and direction determinations can be used to monitor, diagnose, and/or report the operational performance of a crossing warning system.