公开(公告)号：US20240019399A1

公开(公告)日：2024-01-18

申请号：US18025188

申请日：2022-06-28

Applicant: CHINA UNIVERSITY OF PETROLEUM

Inventor： Xin'an YUAN ,  Wei LI ,  Guoming CHEN ,  Xiaokang YIN ,  Xiao LI ,  Jianming ZHAO ,  Jianchao ZHAO

IPC: G01N27/82

CPC classification number: G01N27/82

Abstract: The present disclosure discloses a visual monitoring system of crack propagation of an underwater structure based on an alternating current field, and an alternating current field crack visual monitoring and evaluation method. The method includes that: a coil is used to design and manufacture an alternating current field monitoring sensor array, n alternating current field monitoring sensor component is formed by packaging, a power amplifier component is designed to provide an excitation signal for the alternating current field monitoring sensor component, a differential amplifier component is designed to amplify a weak sensing signal, a multiplexing component is designed to realize time-sharing multiplexing of multiple sensing signals, a signal amplification and filtering component is designed to further amplify and filter the signal, a wave detection component is designed to convert an AC signal into a DC signal, and excitation signal generation, multiplexing control signal output and signal acquisition are realized.