Welding state identification method and device based on ultrasonic welding and electronic equipment

The embodiment of the invention discloses a welding state recognition method and device based on ultrasonic welding and electronic equipment, and relates to the technical field of ultrasonic welding, in the application, a vibration signal of a welding seat is acquired in real time instead of acquiring a signal of a workpiece, modal decomposition is performed on the vibration signal, and a welding state recognition result is obtained. A plurality of vibration mode components are decomposed, so that the vibration index of the ultrasonic working frequency doubled frequency characteristic mode is determined when the corresponding component vibration indexes are extracted from the plurality of vibration mode components; the corresponding welding state is recognized according to the proportion of the vibration index of the ultrasonic working frequency double-frequency characteristic mode relative to the vibration index of the vibration signal, so that the welding state is recognized through the vibration signal of