Trimble. Intelligence in Rail.

Trimble AOAView System

Angle of attack (AOA) inspection

Trimble® AOAView is an automatic non-contact AOA inspection system that measures angle of attack (AOA) and back to back (B2B) on both wheels of a wheelset simultaneously during a train pass at mainline operational speeds. It also provides data for the analysis of truck (bogie) performance.

Trimble AOAView system uses multiple high-speed LIDAR sensors to determine the wheel flange location for both wheels on an axle. The scanner box is installed on a steel tie (sleeper) between the rails and provides measurements that are insensitive to track fluctuations due to dynamic loads. Extremely accurate measurements of back-to-back distance, tracking position and other bogie geometry are also generated.

The data that AOAView generates enables rolling stock operators to improve and optimize their maintenance processes. Wheelset misalignment and other bogie geometry problems can be identified and maintained earlier, reducing costly incidents. Data driven predictive maintenance practices can be used to optimize bogie performance and maximize component lifecycles.

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Key Features

  • Sophisticated image processing algorithms to assess condition and report detected defects.
  • Processed data and measurements are integrated into the Trimble CMMS™ (Condition Monitoring Management System) software to provide web-based access for data visualization, alarm management, and data analytics.
  • Works in the toughest rail environments and extreme weather conditions at mainline operational speeds.
  • System installation does not require any major track modifications.

Inspections & Measurements

Trimble AOAView system inspections and measurements include:

  • Axle angle of attack (AOA).
  • Axle tracking position.
  • Back to back (B2B).
  • Truck (bogie) tracking error.
  • Truck (bogie) lateral shift.
  • Truck (bogie) rotation.
  • Truck (bogie) interaxle misalignment.
  • Detection of truck (bogie) hunting if multiple units are installed.

LEARN MORE: Datasheet


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    Trimble® AOAView is a wayside angle-of-attack (AOA) measurement system that is designed to measure AOA on both wheels of a wheelset simultaneously.

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