Rail News Home MOW March 2017 Rail News: MOW Drones can be used to inspect portions of rail bridges that otherwise would be inaccessible.Photo – Unmanned Experts Inc. — By
This email address is being protected from spambots. You need JavaScript enabled to view it., Associate EditorFor years, railroads have been exploring automation to help improve overall operations. To that end, they've invested in a host of new technologies, such as Machine Vision, predictive analytics and driverless train systems — to name just a few examples.The next chapter in the rail automation story may involve unmanned aerial vehicles (UAVs), more commonly known as drones.These versatile, often camera-equipped devices could help railroads tackle everything from track inspection to yard security to vegetation management, UAV industry experts say. Although the technology holds promise for the rail industry, a few challenges remain, including regulatory and data management issues."We like to say that using a drone is better, faster, cheaper and safer," says Dennis Wierzbicki, rail industry adviser for
Unmanned Experts Inc., which conducts rail-bridge inspections with UAVs and offers general drone consulting and training.Because drones are small and nimble, they can more easily access places that otherwise would be precarious to reach. That means less risk of injury for railroad workers, Wierzbicki says.Plus, drones can withstand a range of weather conditions, including wind, low temperatures and moderate rain or snow.“You don't need to be on the track or suspended hundreds of feet over the ground. You don't need to be out in the elements," Wierzbicki says.Drones also produce a dizzying array of data about the assets they're monitoring. Finding a way to sort, understand and leverage that data remains a challenge, says
BNSF Railway Co. Telecom Director Todd Graetz, who oversees the railroad's drone program and operations.Data overloadSo, the Class I has co-developed a suite of software to help manage, analyze and distribute all the information its drones collect."We are constantly exploring new ways to further leverage the massive amounts of data our UAVs gather daily," Graetz adds.In May 2015, BNSF was chosen as one of three companies to participate in the Federal Aviation Administration's (FAA)
Pathfinder program, which is aimed at exploring the commercial use of UAVs. The other two companies: national news channel CNN and drone maker
PrecisionHawk.And
in October that same year, the Class I partnered with drone manufacturer
Insitu Inc. for the railroad's first long-range drone flight.At the moment, Insitu doesn't have any active programs with BNSF, but the company remains open to working with the railroad in the future, says Paul McDuffee, Insitu's associate vice president of government relations and strategy.Other rail clients also reached out to Insitu following the company's work with BNSF, says McDuffee, though he declined to name them.For BNSF, drones have provided another layer of safety to operations, Graetz says. For example, the railroad can use a small rotorcraft to inspect bridges and gain perspective from vantage points that previously were inaccessible.A better viewThe Class I uses two kinds of UAVs: a multirotor aircraft and a hybrid fixed wing model. Both are equipped with sensors that can deliver infrared data, along with high-definition video and photos.The multirotor aircraft is operated at lower altitudes to examine areas around and underneath bridges."These aircrafts are excellent tools to supplement our bridge inspection processes," Graetz says. "Particularly for large bridges, or bridges over waterways and canyons, our inspectors and engineers are able to see what can be the most difficult places to reach on a more frequent basis."BNSF workers deploy a multirotor drone to
inspect a rail bridge.
Photo – BNSF Railway Co.
That's the message that Unmanned Experts leaders hope to share with others in the rail industry. The company uses UAVs to produce reports that meet federal standards for bridge inspections and feature high-resolution images to better illustrate any problems. In addition, Unmanned Experts' reports are interactive and allow users to focus on specific findings.
The company also uses a process known as computer vision analysis to track trends over time. For example, a railroad could compare several reports to keep tabs on a crack or other flaw in the bridge. Another possible application involves monitoring areas of corrosion, such as rust.