Non-Intrusive Sensors

• Non-intrusive sensors that ‘look’ through the engine case to detect blades passing
• Monitoring of blades allows continuous indication of:
   
  
  • Shaft speed
  • Change in separation between blades and the time between blades – tip timing
  • Peak amplitude of each blade passing - tip clearance
  • Missing pulses or sudden change in timing or signal amplitude – blade damage
• In-service on industrial engine