Abstract:

A diagnosis method of planetary gearbox laser sequence pulse based on high-speed photography technology was developed. The serial pulse laser was used with a high-speed camera to collect the serial pulse signal of the vibration laser of the gearbox， and the vibration signal was collected by multi-sensors to calculate the entropy of signal arrangement. To determine whether there are abnormal characteristics in the laser sequence pulse signal, if abnormalities are detected, the sequence pulse signal is converted into a non?separable linear relationship. Then, the radial basis function(RBF) kernel is utilized to calculate the pulse training values. Based on the level of these training values, the extent of faults in the planetary reducer's gears and bearings is assessed. The test results show that the research method is feasible and effective， and the characteristic points of probability density function are distributed in ［0.23，0.34］ by detecting the sequence pulse signals of different fault signals， which can accurately distinguish four different fault types.

Key words: high speed photography technology, planetary reducer, fault diagnosis, laser sequence pulse, fault feature extraction