A Flexible Wave Velocity Measurement Method Applied to Low Pressure Load Condition

A flexible wave velocity measurement method is proposed and a flexible velocity sensor specimen based on the tiny beam structure is manufactured by flexible processing technology. Different from commercial flexible displacement sensor and other traditional wave velocity sensors, the proposed flexible sensor is devoted to achieving faster response time and smaller pressure threshold. Theoretical analysis and primary experiment are carried out and preliminarily prove that the proposed flexible sensor can respond to the transonic sweeping low-pressure wave formed by aero shock tube in a few micro-seconds. Influence of the sensor interface is also qualitatively analyzed by actual time-domain curves and transonic fluid mechanical model, for better sensor interface technology.