公开(公告)号：US20220413177A1

公开(公告)日：2022-12-29

申请号：US17618410

申请日：2020-07-13

Applicant: SHANDONG UNIVERSITY

Inventor： Shucai LI ,  Huaifeng SUN ,  Nuoya ZHANG ,  Yang YANG ,  Shangbin LIU ,  Wenhan LI ,  Rui LIU

IPC: G01V3/02

Abstract: A novel tracing apparatus includes an electromagnetic transmitting system, a multi-frequency transmitting antenna, electrodes, and a receiver. The electromagnetic transmitting system is at an upstream point and includes a generator and a transmitter having a capacitor; the transmitting antenna penetrates into a detected aquifer through karst collapse or a drill hole; the electrodes and the receiver are at a downstream point, and include two pairs of electrodes orthogonally distributed and located in a cofferdam formed by downstream water; and the receivers collect electric signals in the electrodes. The apparatus is based on good electrical conductivity of water, and can use electromagnetic signals as a tracer for rapid observation. Compared with traditional tracers, electromagnetic signals propagate fast in water, are stable in property, and free of pollution. This apparatus can be applied to groundwater tracing detection, and problems with the traditional tracers having poor timeliness and being environmentally unfriendly are resolved.

公开(公告)号：US20220137000A1

公开(公告)日：2022-05-05

申请号：US17141779

申请日：2021-01-05

Applicant: Inner Mongolia University of Technology ,  Shandong University

Inventor： Ze LI ,  Jingshun LIU ,  Guanyu CAO ,  Rui LIU ,  Shuqin XIAO

IPC: G01N27/72 ,  G01N33/20 ,  H01R13/646 ,  G06F13/42

Abstract: The present disclosure provides a high-frequency magnetoimpedance testing apparatus and method. A testing platform in the apparatus is arranged within a Helmholtz coil and connected to a modulating electric current source and a high-frequency impedance analyzer, respectively; the Helmholtz coil is connected to a DC power source; a processor is connected to the high-frequency impedance analyzer and the DC power source separately; the testing platform includes a first double-sided copper-clad plate, and mode transition switches and connection terminals that are arranged on the first double-sided copper-clad plate; one end of the first double-sided copper-clad plate is connected to the high-frequency impedance analyzer, while the other end of the same is connected to a load; the mode transition switches are connected to the modulating electric current source. The present disclosure can realize in-situ current modulation of metallic fibers and high-frequency magnetoimpedance testing, and improve the testing accuracy.