The invention discloses an
electric power facility space multi-sound-source three-dimensional positioning method and
system based on a
microphone matrix, and the method comprises the steps: setting the
microphone matrix to receive Q far-field sound signals of
electric power equipment, carrying out the
line array and column array addition synthesis of the
microphone matrix, and obtaining an
azimuth linear array and a
pitch linear array; measuring the distance from the center of the array to the plane where the far-field sound signals are located in real time by using a
laser distance measuring sensor; multi-
sound source separation is realized by using a multi-
phase filter, and a pre-downsampling structure is obtained by using multi-phase
decomposition and sampling rate conversion properties; respectively
processing the
azimuth linear array sound source
signal and the
pitch linear array sound source
signal by using a MUSIC spectral peak search method to obtain an
azimuth incident angle and a
pitch incident angle of the sound source signals; and completing three-dimensional positioning of multiple
sound sources according to the distance information between the array and the plane where the
power equipment is located. According to the method, three-dimensional high-precision positioning of multiple
sound sources of the power
transformer can be realized, the positioning precision is improved along with the increase of sound source frequency values, and
engineering realization is easy.