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1.发明公开公开(公告)号：US20240272032A1
公开(公告)日：2024-08-15
申请号：US18422087
申请日：2024-01-25
CPC分类号： G01M3/243 , G01N29/0672 , G01N29/14 , G01N29/2437 , G01N29/42 , G01N2291/0289 , G01N2291/106 , G01N2291/2636
摘要： A transient-based time reversal (TR) technique for acoustic imaging of a pressurized water supply pipeline is provided. Measured multi-input-multi-output (MIMO) imaging data at high frequency (10kH-100 kHz) are processed by an adapted Time Reversal-MUltiple SIgnal Classification (TR-MUSIC) algorithm to provide a high-resolution image of a pipeline section about 100 m long. The resultant image reveals the pipe wall inner and outer condition, and incipient and existing defects at a scale up to millimeters. The technique is tested and validated in a laboratory environment and in a large-scale facility on pressurized water-filled viscoelastic high-density polyethylene pipes. Furthermore, the technique can be applied to different fluids and pipe materials. In addition, the technique is computationally efficient, and nondestructive. The technique requires only local intrusion for placing transducers at an access point.
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公开(公告)号：US20240219355A1
公开(公告)日：2024-07-04
申请号：US18399826
申请日：2023-12-29
CPC分类号： G01N29/348 , G01N29/12 , G01N29/2412 , G01N29/36
摘要： A defect detection method is provided for a pressurized pipe having at least one defect. According to the method, an acoustic source generates a probing wave of a frequency range from 10 kHz to 100 kHz, where the probing wave is scattered by the at least one defect to create a reflected wave; an acoustic receiver measures a wave response to obtain a measured response, where the measured response is attributed essentially to a superposition of the probing wave and the reflected wave; and a computer device processes the measured response to locate the at least one defect.
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