Transformer mechanical fault diagnosis method and system based on sound field distribution diagram

The invention discloses a transformer mechanical fault diagnosis method and system based on a sound field distribution diagram. The transformer mechanical fault diagnosis method comprises the following steps: acquiring a sound field distribution diagram of a to-be-diagnosed transformer and a reference sound field distribution diagram of a transformer with the same model as the to-be-diagnosed transformer; acquiring an HOG feature vector of the sound field distribution diagram of the transformer to be diagnosed and an HOG feature vector of the reference sound field distribution diagram; acquiring a Pearson correlation coefficient between the HOG feature vector of the sound field distribution diagram of the to-be-diagnosed transformer and the HOG feature vector of the reference sound field distribution diagram; and judging the mechanical state of the transformer based on the acquired Pearson correlation coefficient. According to the transformer mechanical fault diagnosis method based on the sound field distribu