The aircraft landing gear environment is about as harsh as they come for instrumentation - extremes of temperature, high levels of shock and vibration and potential exposure to corrosive fluids. Therefore a rugged and reliable measurement solution is absolutely necessary.
Optical sensing solutions using Smart Fibres’ technology can withstand these ultra-harsh conditions, principally due to the absence of electronics at the point of measurement. Operational benefits come from the long-term stability offered by FBG sensors which are easy to set up and require no recalibration over their lifetime. Being able to multiplex multiple sensing points on a single fibre brings the added benefits of reduced weight and simplified cable routing.
Under the collaborative research project ASHLEY, Smart Fibres are developing a suite of FBG based sensors that can measure proximity, rotational velocity, load and temperature on aircraft landing gear.