Virtual Ultrasonic Testing System Based On Lab VIEW And Its DAQ Sequence

摘要

A traditional ultrasonic testing system accomplishes data acquisition and signal processing. with the aid of an ultrasonic flaw detector. The echo wave displayed on its screen carries detailed information about the performance and inner fault of the workpiece. However, these information cannot be directly used to make further analysis and draw a more accurate conclusion. This paper introduces a virtual ultrasonic testing system based on Lab VIEW, which is mainly composed of transducer, signal-regulating circuit, data acquisition sequence, signal analysis part and etc. In this system, regulated analog signals are acquired and input into the computer through RVO3050 virtual Oscilloscope, and then the analyzing work of these acquired data are carried out with Lab VIEW, a software platform of rich analyzing functions. Such a virtual ultrasonic testing system can reflect the characteristics and condition of the fault more accurately than the traditional one. Moreover, with the aid of modern signal analytic method, the testing and analyzing process can be intelligentized and performed automatically. The whole system can be easily integrated into a portable detector set as well. Since it is very crucial for the system to acquire data correctly, the data compatibility in DAQ sequence is also discussed and explained in this paper.