公开(公告)号：US20230333276A1

公开(公告)日：2023-10-19

申请号：US18007567

申请日：2021-06-29

Applicant: SHANDONG UNIVERSITY

Inventor： Shucai LI ,  Huaifeng SUN ,  Nuoya ZHANG ,  Jing YANG ,  Yang YANG ,  Ziqiang ZHENG

IPC: G01V3/17 ,  G01V3/38

CPC classification number: G01V3/17 ,  G01V3/38

Abstract: A method and system for exploring hidden karst pipelines, mainly comprising: determining an upstream and a downstream of an underground karst pipeline; laying a grounding electrode at the upstream and the downstream respectively; establishing an electromagnetic emission system through underground karst water channels in the underground karst pipeline in a survey area, a transmitter and a generator; arranging a receiving system through an air mobile equipment towing a receiver as a receiving end; turning on the electromagnetic emission system; a generator supplying power to emission circuit; controlling the air mobile equipment to move along routes to collect signal continuously above the survey area, to complete an area-based measurement, and obtain observed data in the whole survey area; processing the observed data; delineating a concrete distribution of the underground karst water channels from the to the, such as a net-shaped path diagram or a tree-shaped path diagram

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.