Railway Track & Structures - November 2008 - (Page 21) TTCI R&D Figure 3, top, shows the profile system and base field tracking system. Figure 4 is the U-Rail inspection box showing the head, web and base transducers and laser collimators. where the laser beam can make focused contact. Flaw orientation has minimal effect on detection capability. System description In March 2007, it was determined that the system required modifications to address the limitations identified in the initial prototype design. Changes were made to improve beam delivery and signal reception. These improvements were primarily achieved by incorporating optical arms and stabilizing the inspection box by attaching it to a carriage system that travels over the railhead. The configuration of the ultrasonic air-coupled sensors was also improved by adding two additional sensors to the head, two to the web and two to the base. The U-Rail system is installed in a hi-rail vehicle with the inspection box mounted to a carriage, located under the rear cabin of the vehicle. The carriage can be retracted under the rear cabin for storage or during transport. The carriage has a pneumatic cylinder to provide the necessary load to keep the wheels in contact to the gauge surfaces of the rails. This configuration guarantees constant lateral and vertical positioning of the inspection box with respect to the rail. Laser beams are delivered from the laser head to the inspection box through articulating optical arms customized for this application in order to: • Dampen vibrations coming from the carriage • Add resistance to rotation of the knuckle and avoid possible www.rtands.com Railway Track & Structures November 2008 21 http://www.aar.com http://www.transalert.com http://www.transalert.com http://www.rtands.com
Table of Contents Feed for the Digital Edition of Railway Track & Structures - November 2008 Railway Track and Structures Contents On Track Industry Today Supplier News AREMA News NRC News TTCI R&D TrainingVvital in Shaping Future of Railroad Industry Switch Stands, Switch Machines Automation Offers Improvements in M/W Planning AREMA 2008 Conference Report Products and Literature People Calendar Advertisers Index Sales Representatives Website Directory Professional Directory Classified Advertising Chicago Perspective Railway Track & Structures - November 2008 Railway Track & Structures - November 2008 - Railway Track and Structures (Page Cover1) Railway Track & Structures - November 2008 - Railway Track and Structures (Page Cover2) Railway Track & Structures - November 2008 - Contents (Page 1) Railway Track & Structures - November 2008 - Contents (Page 2) Railway Track & Structures - November 2008 - On Track (Page 3) Railway Track & Structures - November 2008 - On Track (Page 4) Railway Track & Structures - November 2008 - Industry Today (Page 5) Railway Track & Structures - November 2008 - Industry Today (Page 6) Railway Track & Structures - November 2008 - Supplier News (Page 7) Railway Track & Structures - November 2008 - Supplier News (Page 8) Railway Track & Structures - November 2008 - AREMA News (Page 9) Railway Track & Structures - November 2008 - AREMA News (Page 10) Railway Track & Structures - November 2008 - AREMA News (Page 11) Railway Track & Structures - November 2008 - AREMA News (Page 12) Railway Track & Structures - November 2008 - AREMA News (Page 13) Railway Track & Structures - November 2008 - AREMA News (Page 14) Railway Track & Structures - November 2008 - NRC News (Page 15) Railway Track & Structures - November 2008 - NRC News (Page 16) Railway Track & Structures - November 2008 - NRC News (Page 17) Railway Track & Structures - November 2008 - NRC News (Page 18) Railway Track & Structures - November 2008 - NRC News (Page 19) Railway Track & Structures - November 2008 - TTCI R&D (Page 20) Railway Track & Structures - November 2008 - TTCI R&D (Page 21) Railway Track & Structures - November 2008 - TTCI R&D (Page 22) Railway Track & Structures - November 2008 - TrainingVvital in Shaping Future of Railroad Industry (Page 23) Railway Track & Structures - November 2008 - TrainingVvital in Shaping Future of Railroad Industry (Page 24) Railway Track & Structures - November 2008 - TrainingVvital in Shaping Future of Railroad Industry (Page 25) Railway Track & Structures - November 2008 - TrainingVvital in Shaping Future of Railroad Industry (Page 26) Railway Track & Structures - November 2008 - Switch Stands, Switch Machines (Page 27) Railway Track & Structures - November 2008 - Switch Stands, Switch Machines (Page 28) Railway Track & Structures - November 2008 - Switch Stands, Switch Machines (Page 29) Railway Track & Structures - November 2008 - Switch Stands, Switch Machines (Page 30) Railway Track & Structures - November 2008 - Automation Offers Improvements in M/W Planning (Page 31) Railway Track & Structures - November 2008 - Automation Offers Improvements in M/W Planning (Page 32) Railway Track & Structures - November 2008 - Automation Offers Improvements in M/W Planning (Page 33) Railway Track & Structures - November 2008 - Automation Offers Improvements in M/W Planning (Page 34) Railway Track & Structures - November 2008 - AREMA 2008 Conference Report (Page 35) Railway Track & Structures - November 2008 - People (Page 36) Railway Track & Structures - November 2008 - Calendar (Page 37) Railway Track & Structures - November 2008 - Sales Representatives (Page 38) Railway Track & Structures - November 2008 - Website Directory (Page 39) Railway Track & Structures - November 2008 - Professional Directory (Page 40) Railway Track & Structures - November 2008 - Classified Advertising (Page 41) Railway Track & Structures - November 2008 - Classified Advertising (Page 42) Railway Track & Structures - November 2008 - Classified Advertising (Page 43) Railway Track & Structures - November 2008 - Chicago Perspective (Page 44) Railway Track & Structures - November 2008 - Chicago Perspective (Page Cover3) Railway Track & Structures - November 2008 - Chicago Perspective (Page Cover4)
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