A rotary machine includes a rotatable shaft (106) and a retaining ring (202) coupled to, and at least partially extending about, the rotatable shaft (106). The rotatable shaft (106) defines a longitudinal axis (204). The rotatable shaft (106) and the retaining ring (202) define an annular cavity (206). The rotatable shaft (106) and the retaining ring (202) each include a radially outer surface (208,210). The rotary machine also includes a monitoring system including a stationary reader-antenna (240) positioned proximate the retaining ring (202) and a radio frequency (RF) coupler (220). The RF coupler includes at least one flexible antenna band (222,224) coupled to, and extending over, the radially outer surface of the retaining ring (202). The flexible antenna band (222,224) is configured to establish RF coupling with the stationary reader-antenna (240). A sensor die is coupled to the flexible antenna band. The sensor die extends into the substantially annular cavity (206) and the sensor die is also coupled to the radially outer surface (208) of the rotatable shaft (106).
PASSIVE WIRELESS SENSORS FOR ROTARY MACHINES
PASSIVE DRAHTLOSE SENSOREN FÜR ROTATIONSMASCHINEN
CAPTEURS SANS FIL PASSIFS POUR MACHINES ROTATIVES
2017-01-11
Patent
Elektronische Ressource
Englisch