Dynamic air gap measuring device for use with rotating...

Details Dynamic air gap measuring device for use with rotating... Dynamic air gap measuring device for use with rotating...

G - Physics

01

S

349/33

G01S 15/88 (2006.01) G01B 11/14 (2006.01) G01S 15/14 (2006.01)

Patent

CA 1273098

Abstract of the Disclosure The air gap between a rotor and a stator in rotating electrical machinery is determined using sonar techniques. An ultrasonic signal transmitter and receiver are mounted on one of the rotor and stator for transmitting ultrasonic signals to the other of the rotor and stator and receiving reflections therefrom. The time between signal transmis- sion and reflected signal reception is determined, and the spacing of the rotor and stator is determined from the time, the velocity of sound, and the speed of rotation of the rotor.

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