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公开(公告)号：US12062167B1
公开(公告)日：2024-08-13
申请号：US18398665
申请日：2023-12-28
Applicant: SHANDONG UNIVERSITY
Inventor： Mingshun Jiang , Lingyu Sun , Shanshan Lv , Juntao Wei , Lei Zhang , Faye Zhang , Qingmei Sui , Lei Jia
CPC classification number: G06T7/001 , G06T5/20 , G06T5/70 , G06T7/74 , G06T7/77 , G06T2207/10132 , G06T2207/20076 , G06T2207/30108
Abstract: A probability multiply-sum structural damage imaging positioning method and system based on a delay factor includes obtaining optimal excitation frequency and group-velocity theoretical correction function based on numerical simulation of composite laminates; based on optimal excitation frequency, obtaining ultrasonic guided wave response signals of composite laminates in healthy and lossy states and sensor coordinates used for signal collection; performing path screening based on ultrasonic guided wave response signals; obtaining group-velocity correction function based on measured group velocity obtained based on ultrasonic guided wave response signal in healthy state, and calculating actual delay time based on obtained effective path, group-velocity correction function, and sensor coordinates; obtaining damage delay factor based on actual and reference delay time; forming path probability distribution based on damage delay factor, and performing path probability multiply-sum operation to obtain structural damage imaging result; and obtaining structural damage positioning result based on peak point coordinates of imaging result.
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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.
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公开(公告)号：US12038311B1
公开(公告)日：2024-07-16
申请号：US18487278
申请日：2023-10-16
Applicant: SHANDONG UNIVERSITY
Inventor： Zhengfang Wang , Jing Wang , Qingmei Sui , Lei Jia
CPC classification number: G01D5/38 , G01B11/16 , G01B11/165 , G01B11/24 , G01B11/26 , G01C9/00 , G01L1/246 , G01M11/088
Abstract: A self-correcting assemblable optical fiber sensing system for a displacement field and a correction method thereof are provided. The system includes multiple assemblable flexible optical fiber sensing devices for measuring displacement field; multiple inclination angle self-sensing connection devices for connecting between assemblable flexible optical fiber sensing devices, and an optical fiber demodulation device for obtaining strain data of the assemblable flexible optical fiber sensing devices and two-axis inclination angle data of the inclination angle self-sensing connection devices, and correcting the displacement field measured by the assemblable flexible optical fiber sensing devices. The assemblable flexible optical fiber sensing devices are connected between the inclination angle self-sensing connection devices, and the optical fiber demodulation device is connected to a free end of the inclination angle self-sensing connection device. In this situation, two-dimensional displacement field monitoring of the large-scale structure can be realized.
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公开(公告)号：US11774579B1
公开(公告)日：2023-10-03
申请号：US18146323
申请日：2022-12-23
Applicant: SHANDONG UNIVERSITY
Inventor： Zhengfang Wang , Jing Wang , Qingmei Sui , Lei Jia
CPC classification number: G01S13/885 , H01Q21/24 , G01S2205/03
Abstract: Disclosed are an unmanned airborne ground penetrating radar system and an inspection method for a dam hidden danger detection, including an unmanned aerial vehicle (UAV) system; the UAV system includes an unmanned aerial vehicle, a sensor platform, a radar platform, a forward-looking laser rangefinder and a ground penetrating radar; the sensor platform is installed on the UAV, and the forward-looking laser rangefinder is installed on the sensor platform, and the radar platform is installed on the UAV at one side of the sensor platform; moreover, the ground penetrating radar is installed on the radar platform, and a variable polarization ground penetrating radar antenna array is arranged in the ground penetrating radar; the variable polarization ground penetrating radar antenna array includes a substrate, and a plurality of groups of orthogonal dual-polarization Vivaldi antenna transmitting subarrays and receiving subarrays are mounted on the substrate.
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