Signal Light Monitoring for Integrity and Viewability Compliance
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Solution Overview
Problem
Current methods for monitoring the integrity, viewability, and conspicuity of railroad train control signal lights rely heavily on manual inspections, which are subjective, resource-intensive, and prone to human error, and existing automated systems fail to detect issues such as unclear or partially powered signal lights, leading to potential safety hazards.
Innovation Solution
A wireless network of signal light monitors equipped with diverse sensors, including light intensity, color, and camera sensors, attached to signal light enclosures, which continuously detect and report signal light performance metrics to a central processor for real-time analysis and comparison against predefined standards, ensuring integrity, viewability, and conspicuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual visual inspection is used to monitor signal light integrity and viewability, then human judgment can assess signal light conditions, but the method is subjective, prone to human error, and requires significant human resources
Solution Approach 1:
The patent replaces manual visual inspection with an automated optical sensing system. Sensors mounted on maintenance vehicles objectively measure signal light characteristics (intensity, color, viewability) without human intervention, eliminating subjectivity and human error while reducing the need for numerous inspection personnel.
Solution Approach 2:
The signal light monitoring system performs self-assessment through automated sensors that continuously evaluate signal light performance. The system self-diagnoses issues related to integrity, viewability, and conspicuity without requiring external human judgment, enabling reliable autonomous monitoring.
2Productivity
If multiple personnel are deployed for manual inspection of extensive signal light networks, then coverage of large distances is achieved, but resource consumption and time requirements increase significantly
Solution Approach 1:
The automated sensing system mounted on maintenance vehicles serves multiple functions: it monitors signal light integrity, viewability, and conspicuity simultaneously while the vehicle performs its regular maintenance route. This multi-functionality allows extensive network coverage without requiring dedicated inspection personnel, significantly improving productivity while reducing resource consumption.
3Extent of automation
If electrical tests are performed on signal equipment to check bulb power and filament presence, then objective data can be obtained, but human intervention is still required and automation is limited by local circuit wiring
Solution Approach 1:
The patent replaces electrical testing methods with optical sensing. Sensors mounted on moving vehicles detect signal light characteristics through non-contact optical measurement, achieving full automation without requiring local circuit wiring or human intervention. This approach simplifies operation while maximizing automation extent.
4Measurement precision
If signal light monitors are attached to signal light enclosures with diverse sensors, then comprehensive detection of signal light health is achieved, but the system complexity and cost increase
Solution Approach 1:
The patent combines multiple sensing functions (intensity measurement, color detection, viewability assessment) into integrated monitor units that are mounted on existing maintenance vehicles. This merging of functions achieves comprehensive signal light health detection while leveraging existing infrastructure, thereby reducing overall system complexity despite the advanced capabilities.
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
The system provides a non-intrusive, automatic, and reliable method for real-time monitoring of signal light performance, reducing human error and resource requirements while detecting potential safety issues before they cause accidents.
Implementation Method 1
Each signal light monitor includes at least one light sensor configured to capture detection data representing signal light integrity and viewability
Implementation Method 2
The signal light monitor includes a camera sensor configured to capture an image of the signal light
Data Source
AI summary
A method of detecting signal light integrity and viewability of a plurality of signal lights is performed by a signal light monitoring system including a plurality of signal light monitors coupled to the signal lights and a network interface communicator configured to interface the signal light monitors to a wireless network. The method includes receiving detection data from each signal light monitor, measuring a first measurement of signal light integrity, processing the first measurement of signal light integrity to determine at least one signal light integrity value, retrieving at least one performance requirement associated with the signal light monitors, comparing the performance requirement to the signal integrity value, determining whether each signal light monitor is compliant with the performance requirement, and propagating the compliance determination and the first measurement of signal light integrity over the wireless network via the network interface communicator.