Strain Monitoring Transducers for Helicopter Rotating Assemblies Based on Combined Use of Optoelectronic and Ultrahigh Frequency Transducers

This article deals with strain monitoring devices for helicopter rotating assemblies based on combined use of optoelectronic and ultrahigh frequency transducers. Devices for monitoring condition of gas turbine power unit blades and the main helicopter rotor are discussed. The principles and conditions of operation of suggested methods and devices are described. Basing on the provided information, a part of infrared spectrum is suggested to be used for subsequent development of sensors and systems. The conclusions are made concerning applicability and further development of the suggested method.