Fault Detection Devices of Rotating Machinery Based on SOPC

For the common failure of motor rotation, a reliable acquisition and detection device of motor rotation signal is designed, and the general design scheme of the test system and the implementation of hardware and software are given. The system consists of high-speed frequency counter chip FPGA module and the SOPC system structure, using NIOS II as the system control unit to control the work of the counter, and completing high-precision frequency meter design at the core of FPGA with appropriate software and hardware resources. The Counting result is sent by serial port to the host computer for further signal analysis such as FFT and harmonic wavelet packet, to get more detailed distribution of signal spectrum as the basis to judge the fault signal. The frequency meter system developed with Nios technology can simplify the external measurement hardware circuits, stabilize the performance and flexibly achieve custom application. Experimental results show that the test system can well be used to fault detection of mechanical system.