Description:
In the railroad industry, the “age” of rail is measured by the number and severity of wheel loads. Typically the age of the rail is quantified as millions of gross tons (MGT). As rails age, they are more susceptible to developing rolling contact fatigue. Rolling contact fatigue can lead to rail internal defects which, in turn, can lead to rail failure and a train derailment. Therefore, knowing the “age” of a rail, the number and severity of the loads it has carried, is important.
This topic seeks to develop a device that can measure the service life of rail in term of wheel load cycles and, if possible, peak and average wheel loads. It is envisioned that this technology take the form of a tag applied to the rail web, although other practical and innovative configurations may be proposed.
In terms of software, the tag should be programmable with basic rail characteristics and date/location of installation and re-installation, and should be readable by a designated handheld device, laptop computer, or other portable device (such as a tablet pc). The data being read by the receiving handheld device should automatically populate a database. The exact content and data to be included in this database may be discussed with the FRA program manager early in the period of performance. The main purpose of a Phase 1 contract will be to demonstrate feasibility and efficiency of the data transfer rather than focusing on the actual content of the data fields; the exact content of the data fields would be included in a follow-on Phase 2 effort.
With respect to hardware, the device shall be maintenance-free, self-powering (5 year minimum life). Device production cost should be low in consideration of the high volume production that may be needed. The device shall be designed to be removeable and replaceable, and shall not interfere with normal train operations or routine track maintenance activities.
The scope of research projects for this topic shall include laboratory demonstration of developed technologies.
Expected Phase I Outcomes:
The scope of research projects for this topic shall include laboratory demonstration of developed technologies.
Expected Phase II Outcomes:
Modify the prototype, based on lessons learned in Phase 1. The Phase 2 deliverable should be a prototype that is rugged and is capable of extended field testing.
