Usage Autocorrelation Function in the Capacity of Indicator Shape of the Signal in Acoustic Emission Testing of Intricate Castings

3rd All-Russian Scientific and Practical Conference on Innovations in Non-Destructive Testing

Popkov, Artem^1

Siberian State Transport University, Novosibirsk, Russia^1

关键词: Acoustic emission signal;    Autocorrelation functions;    Carrier frequency;    Frequency modeling;    Object of control;    Operation factors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/671/1/012047/pdf
DOI  :  10.1088/1742-6596/671/1/012047

来源: IOP

【 摘 要 】

The article contains information about acoustic emission signals analysing using autocorrelation function. Operation factors were analysed, such as shape of signal, the origins time and carrier frequency. The purpose of work is estimating the validity of correlations methods analysing signals. Acoustic emission signal consist of different types of waves, which propagate on different trajectories in object of control. Acoustic emission signal is amplitude-, phase- and frequency-modeling signal. It was described by carrier frequency at a given point of time. Period of signal make up 12.5 microseconds and carrier frequency make up 80 kHz for analysing signal. Usage autocorrelation function like indicator the origin time of acoustic emission signal raises validity localization of emitters.