Foreign Object Debris (FOD) is a major source of damage for aircraft engines. Prime Photonics has been involved in the detection and measurement of FOD strike as well as its resulting damage for many years.
Resulting damage to individual blades can be measured with the FOCIS™ Blade Vibration Measurement System. This system measures the time of arrival of each blade and analysis can detect blade issues that change the lean or vibration frequency of the blades.
Detection of FOD strike as it occurs is a current topic of research. High speed optical methods are viable for inlet debris monitoring but require high data rates, high processing power, and high cost systems. Prime Photonics led multiple projects to measure FOD impact by detecting the resulting vibration of the blades with an optical tip timing system. This system was effective for moderate to high momentum FOD impacts (even for non-damaging strikes from small objects) and when FOD struck near a probe or near the tip of a blade, however, low-momentum impacts, as well as impacts closer to the hub or far from an optical probe led to inconsistent detection because the blade vibration dissipated quickly.
Prime Photonics is now working on a different inlet debris monitoring concept to observe FOD strike in real time with a camera-based system.
For details about foreign object detection research please fill out the form below.