Prototype Wayside instrumentation has been designed, developed, and tested that proves the feasibility of measuring braking system effectiveness on moving rail cars. The instrumentation system includes a specially designed short section of instrumented rail and two infrared detectors. The rail section deflects elastically under each passing wheel load, and two orthogonally placed transducers discriminate between rail reaction to braking and to weight. A pair of infrared detectors viewing the rims on both wheels of each axle provide thermal data useful in determining the side to side ratio of total axle braking effort. Together these sensors can generate data to evaluate the braking performance of each wheel. Field tests to evaluate the system were conducted on a commercial rail line and at the U.S. Department of Transportation's Transportation Test Center at Pueblo, CO. Test results showed that the sensors were able to indicate normal and abnormal braking conditions. Also included in the report are a railcar brake system fault and malfunction analysis, structural analysis of the instrumented rail, design analysis of the infrared sensor, detail specifications of the rail and infrared sensors, and recommendations for further system development and testing.

  • Corporate Authors:

    Novatek, Incorporated

    79R Terrace Hall Avenue
    Burlington, MA  United States  01803

    Transportation Systems Center

    55 Broadway, Kendall Square
    Cambridge, MA  United States  02142

    Federal Railroad Administration

    Office of Research and Development, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Spaulding, D B
    • Lentz, KWJ
    • Fryklund, G G
    • Gillespie, J R
  • Publication Date: 1980-6

Media Info

  • Pagination: 205 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00327750
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FRA/ORD-80/20 Final Rpt., DOT-TSC-FRA-80-8
  • Contract Numbers: DOT-TSC-1323
  • Files: NTIS, TRIS, USDOT
  • Created Date: Feb 18 1981 12:00AM