公开(公告)号：US12000799B1

公开(公告)日：2024-06-04

申请号：US18400246

申请日：2023-12-29

Applicant: SHANDONG UNIVERSITY

Inventor： Mingshun Jiang ,  Juntao Wei ,  Feiyu Teng ,  Shanshan Lv ,  Lingyu Sun ,  Lei Zhang ,  Faye Zhang ,  Qingmei Sui ,  Lei Jia

IPC: G01N29/24

CPC classification number: G01N29/2437

Abstract: A digital, self-diagnosis, sensing intelligent layer integrating active and passive monitoring, including: a capacitance testing unit, configured to charge a to-be-tested piezoelectric transducer by generating a step signal, and determine a transition moment, to obtain a free capacitance value of the to-be-tested piezoelectric transducer; a frequency testing unit, to charge the to-be-tested piezoelectric transducer by generating sinusoidal signals of different frequencies, and detect a resonant frequency according to the transition moment; an active and passive monitoring module, to obtain analog response signals in an active mode and a passive mode, and convert the analog response signals into digital response signals for transmission; and a main control module, to transmit a self-diagnosis result and the digital response signals to a guided wave host. The intelligent layer integrates active damage scanning and passive impact monitoring while implementing self-diagnosis for a piezoelectric transducer state.