Wind turbine gearbox is the most failure frequency component of the wind turbine.For the non-smooth characteristics of the most gearbox vibration signals

a wind turbine gearbox fault diagnosis system is designed

which takes DSP TMS320F28335 as its core processor and can run independently without master computer.The hardware platform of system is built with various peripheral module of TMS320F28335

including the data acquisition of analog

frequency and digital signal acquisition and the communication function of ethernet and CAN bus.The acquired data is processed by EMD algorithm which decompose the vibration signal into IMF components

and then

with the Hilbert transform

and an accurate signal Hilbert marginal spectra is obtained.According to the Hilbert marginal spectra

the potential failure information is got.Tests show that

the system can effectively diagnose the fault of gearbox.