In-Line Oil Debris Monitor (ODM) for Helicopter Gearbox Condition Assessment

Abstract

The development of an inline, full flow oil debris sensor system for the engine nose gearbox of a military helicopter is described. The sensor is designed as a direct one for one replacement of an existing magnetic chip detector, located in the scavenge oil line of the gearbox. The sensor is based on an inductive measurement technique which enables the system to detect, count and classify wear metal particles by size and type (ferromagnetic or non-ferromagnetic) with a detection efficiency of close to 100% above the minimum particle size threshold of approximately 175 microns. The design requirements, principle of operation, mechanical design features and electronic design features of the sensor are discussed. The performance and characteristics of the sensor system, as measured during development testing, are also presented.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1998
Accession Number
ADA347503

Entities

People

  • B. Howe
  • D. Muir

Tags

Communities of Interest

  • Advanced Electronics
  • Sensors

DTIC Thesaurus Topics

  • Aircraft Engines
  • Aircraft Equipment
  • Aircrafts
  • Bearings
  • Circuit Boards
  • Detection
  • Detectors
  • Diameters
  • Ferromagnetic Materials
  • Filters
  • Helicopters
  • Materials
  • Nose Wheels
  • Particle Size
  • Particles
  • Test And Evaluation
  • Warning Systems

Readers

  • Aerosol Science/Aerosol Physics
  • Sensor Fusion and Tracking Systems.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems