Design of Large Rotor Vibration Signal Acquisition System Based on STM32

In order to study the performance degradation trend prediction and the fault evolution law of large rotors,a set of large rotor vibration signal acquisition system was designed based on STM32. And a practical circuit experiment was carried out.The sensor signals were processed by conversion,filter and some other signal processing. Then the external AD converter converted it to digital signal. A digital filtering by the main control chip STM32f103 x was used in the transformed signals,before it was output to PC for further processing through a serial port. Host user program was designed by Lab VIEW. The two channel vibration signals were real- time displayed in the waveform diagram at the same time. And the data were fully saved in the Excel sheet. The fast Fourier transform was used in the historical data,which were read from the Excel sheet,to map out a frequency domain graph. The experiments show that the system can realize real- time vibration signal acquisition and storage. It also can analyze the frequency domain of the historical data. It provides important information for the performance degradation trend prediction and the fault evolution law of large rotors.