Reactor iron core loosening fault detection method and detection system

The invention discloses an electric reactor iron core loosening fault detection method and system, and the method comprises the following steps: employing an acoustic sensor array, and collecting a noise signal during the operation of an electric reactor in a normal state; adopting a delay summation beam forming algorithm to extract a reactor vibration signal from the acquired noise signal; enabling the reactor vibration signal to generate a three-dimensional image, establishing an OXYZ coordinate system according to the three-dimensional image, constructing a noise sound pressure level co-occurrence matrix, and calculating a characteristic value representing the normal state of the reactor; an acoustic sensor array is adopted, noise signals of the reactor in operation in a to-be-detected time period are collected in real time, a characteristic value representing the to-be-detected time period of the reactor is calculated, and whether the reactor has a loosening fault or not is judged based on the characteris