Modular Rail Impact Load Detection for Fast WILD Repair
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Solution Overview
Problem
Current wheel impact load detection (WILD) systems in railroads face issues such as lengthy installation times, track closures during repairs, lack of redundancy, and inability to measure abnormal accelerations, leading to undetected defects and high downtime.
Innovation Solution
A modular, easily installable and repairable impact load detection system with redundant sensors and on-board data processing, using strain gauges and accelerometers affixed to railroad tracks, capable of measuring both vertical impacts and accelerations, and communicating via Ethernet/IoT connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strain gauges are welded to the track for WILD system installation, then measurement reliability is improved, but installation time and track downtime increase significantly
Solution Approach 1:
The system divides the measurement function into separate modular components: strain gauges are installed independently on individual rails, and accelerometer assemblies are mounted separately on rail ties or bridges. This segmentation allows each component to be installed, removed, or replaced independently without affecting the entire system, dramatically reducing installation and maintenance downtime while maintaining measurement reliability through redundant measurement points.
Solution Approach 2:
The patent introduces accelerometer assemblies as intermediary devices that mount on rail ties or bridges rather than directly welding strain gauges to the track. These intermediaries capture impact events through vibration measurements and transmit data wirelessly, eliminating the need for extensive welding operations and track closures while providing reliable defect detection.
2Measurement precision
If strain gauges are welded to the track, then impact force measurement capability is improved, but repair complexity and required specialized personnel increase
Solution Approach 1:
The system incorporates wireless communication capabilities and onboard data processing that allow the measurement system to self-configure and self-diagnose. Accelerometer assemblies automatically calibrate themselves and transmit data through wireless networks, eliminating the need for specialized welders and complex repair procedures. Standard technical personnel can install and maintain the system using conventional mounting techniques.
3Reliability
If multiple strain gauges are installed on each rail for redundancy, then system availability is improved, but device complexity and installation space requirements increase
Solution Approach 1:
The accelerometer assemblies serve multiple functions simultaneously: they measure impact forces, detect wheel defects, monitor track conditions, and provide vibration analysis. This multi-functionality allows the system to achieve high reliability and availability through fewer physical components compared to traditional multi-gauge installations, reducing device complexity while maintaining redundant measurement capabilities across multiple locations.
4Measurement precision
If wayside electronics are placed close to strain gauges for signal processing, then signal quality is improved, but track clearance encroachment and installation space requirements increase
Solution Approach 1:
The patent replaces wired mechanical signal transmission with wireless electronic communication. Accelerometer assemblies process signals locally using onboard microprocessors and transmit data wirelessly through antennas, eliminating the need for physical cable connections and nearby wayside electronics. This substitution maintains signal quality through digital processing while freeing up track clearance and reducing installation space requirements.
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
Facilitates rapid installation and repair, reduces downtime, and enhances defect detection by measuring various impact types, ensuring continuous operation and improved accuracy in identifying wheel faults and other transportation issues.
Implementation Method 1
The system consists of a set of strain gauges that are welded to the track
Implementation Method 2
measuring vertical and horizontal forces, and allows for continuous operation with minor failures
Data Source
AI summary
An impact load detector can include a rigid object affixed to a structure for which an impact is to be evaluated. The detector can include one or more sensors which are configured to acquire impact data corresponding to an effect the impact on the structure has on the rigid object. The detector can include a data processor that processes the impact data to evaluate for a presence of a set of faults.