Study on Measurement and Fault Diagnosis of Rotor Radial Vibration Displacement

For the strong electromagnetic field interference, electric eddy current sensors can not measure the rotor vibration. This paper presents a new measurement system based on the linear array CCD sensor, optical system and computer. The vibration signal acquisition is processed by Fourier transform and wavelet analysis, to get rotor vibration information. Experiments show that the rub impact and impact fault can be diagnosed accurately in the low and middle speed rotor with the vibration frequency below 200Hz, and the measurement accuracy of the rotor radial vibration displacement is 10um.