Recognition of Corona Discharge Presence by Spectral Characteristics of Acoustic Radiation

In the chapter the mathematical model of spectroacoustic dependence of the corona discharge was described. To solve the task of creating the model, the acoustic spectrum was decomposed by Fourier transform. The results of the decomposition are described, the regularities in the spectrum of acoustic radiation by corona discharge are found and spectral lines which are attributed to the corona discharge are shown. The model of acoustic radiation corona discharge was created according to the Fourier transformations applied to the results of experiments processing. Application of the model of mathematical dependence of the acoustic spectrum allowed to create of a method of recognition of the presence of corona discharge by the spectral characteristics of acoustic radiation. The developed method was used to develop a method of corona discharge detection in the presence of external acoustic noises. For the possibility of using the method in the development of corona discharge detection devices, the methods for non-rusting and overloading devices were developed. The method of acoustic detection of corona discharge occurrence is shown to be advantageous—it is possible to detect corona discharge occurrence without contact with jet-active parts, remotely, even behind the direct visibility, with minimal influence of external factors, such as weather conditions, years of work and others.