Periodic motion blade audio fault detection system

The invention discloses a periodic motion blade audio fault detection system, and relates to the technical field of audio fault detection. The system comprises a pickup module and an industrial control module, the distance between the assembly position of the pickup module and a main shaft of a fan is greater than the length of a blade and less than twice the length of the blade, wherein the pickup module is used for acquiring audio information and transmitting the audio information to the industrial control module; and the industrial control module is used for decoding and analyzing the acquired audio information and completing information sending. Fluid noise generated by periodic circular motion of the blades of the periodically running mechanical equipment in a medium is utilized to detect blade abnormity, then blade faults are judged, audio characteristics are extracted through inherent characteristics of periodic running, and the system has the advantages of online real-time detection, low application d