Patent ID: 11927563
Assignee: NANJING UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G  B  H | IPC B  G  H

Claim 2:
3. A system for determining the impact quality of a postwelding seam based on the smart acoustic information recognition-based welded weld impact quality determination method according to claim 1, comprising an acoustic signal acquisition hardware platform for acquiring acoustic signals in the process of impact treatment of the postwelding seam; a signal processing and feature extraction module for conducting filtering pretreatment and feature value calculation on the acoustic signals; and a determination module for inputting feature values calculated by the signal processing and feature extraction module into a multi-weight neural network and outputting a quality determination result, wherein the multi-weight neural network is a multi-weight neural network which is used for determining the impact quality of the postwelding seam after being trained; wherein the acoustic signal acquisition hardware platform comprises an ultrasonic impact gun, a mobile operation platform, a weldment to be processed, a free-field microphone, a sound and vibration analyzer and a PC, wherein a position of the ultrasonic impact gun is fixed, the weldment to be processed is fixed on the mobile operation platform, and the mobile operation platform moving relative to the ultrasonic impact gun along a length direction of the weldment to be processed; while the mobile operation platform moving together with the weldment to be processed, the ultrasonic impact gun performs seam residual stress treatment on a weld toe of a seam of the weldment to be processed; the free-field microphone is placed in a circle with a radius of 1.5 m centered on a tip of the ultrasonic impact gun, and is used to collect analog signals of sound in the whole treatment process and transmit the analog signals to the sound and vibration analyzer; the sound and vibration analyzer converting the received analog signals of sound into digitized time-domain acoustic signals; then, the sound and vibration analyzer transmits received sound information to the PC, and the PC storing the information in the form of files; both the signal processing and feature extraction module and the determination module are arranged in the PC; then the signal processing and feature extraction module conducts filtering pretreatment and feature value calculation on the acoustic signals; finally, the determination module inputting calculated feature values into a multi-weight neural network and outputs a quality determination result, and determining whether stress treatment of the postwelding seam is qualified according to the output result.