FLUIDIC TEMPERATURE SENSOR AND ITS USE

摘要

A temperature sensor comprises a pneumatic fluidic bistable amplifier (16) whose control ports (26, 28) are interconnected by a tube (34) to form a fluidic oscillator. The tube (34) is exposed externally to a hot gas stream, such as the turbine inlet gases in a gas turbine engine, so that the speed of sound in the tube (34) varies with variations in the temperature of the gases. This results in a corresponding variation in the oscillation frequency. The signal from the oscillator (16) is then amplified by a fluidic buffer amplifier (42) and converted to an electrical frequency signal by a transducer (62).