Science & Engineering Research Support soCiety (SERSC)
Aiming at the problem of traditional nondestructive testing steel pipe defect, ultrasonic testing system based on virtual Instrument was designed. The hardware platform is the signal source which is based on microcontroller and the HS4 data acquisition card by USB bus. The software platform adopts the LabVIEW to program by using the multithread to acquire all kinds of signal by real-time. The nondestructive feature was found by using the filter, Short Time Fourier Transform (STFT) analysis and joint time domain analysis. The designed system has been used to the pipe defect inspection of some company, which is stable and can achieve an anticipant effect.