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：US20220308249A1

公开(公告)日：2022-09-29

申请号：US17603442

申请日：2021-03-30

Applicant: SHANDONG UNIVERSITY ,  THE CHINESE UNIVERSITY OF HONG KONG, SHENZHEN

Inventor： Shucai LI ,  Yang YANG ,  Jishan HE ,  Diquan LI ,  Jingbo WENG ,  Huaifeng SUN

IPC: G01V3/08

Abstract: A method and system for generating a logarithmic non-uniform pseudo-random electromagnetic exploration signal including: constructing two or more basic unit signals, according to an exploration requirement, that are stairstep signals obtained by superposing in-phase periodic square wave signals, a frequency ratio between adjacent periodic square wave signals is 2, and the two or more basic unit signals meet the following requirement: if a lowest dominant frequency in a first basic unit signal is a fundamental frequency, lowest frequencies of the remaining basic unit signal are l×2m times the fundamental frequency, where l is an odd number except 1, and m is a natural number; and superposing the two or more basic unit signals to obtain a logarithmic non-uniform 2n sequence pseudo-random signal. A logarithmic non-uniform 2n sequence stairstep signal is constructed within a limited frequency interval, and requirements of prospectors for a higher frequency density within a specific frequency interval are met.

公开(公告)号：US20240345275A1

公开(公告)日：2024-10-17

申请号：US18411805

申请日：2024-01-12

Applicant: SHANDONG UNIVERSITY

Inventor： Yang YANG ,  Shucai LI ,  Heng ZHANG ,  Yuzhen ZHU ,  Huaifeng SUN

IPC: G01V3/08

CPC classification number: G01V3/083 ,  G01V2003/084 ,  G01V2003/085

Abstract: A system and method for controlled-source electromagnetic exploration is based on staggered frequency excitation of crossed sources. Different high-order pseudo-random signals are transmitted using two sources, respectively, each set of high-order pseudo-random signals may contain sufficient frequencies within a same complete frequency range, exploration frequencies of the two sets of signals are completely staggered, simultaneous transmission by the two field sources is implemented, and different polarization modes do not affect each other and are separated from each other. Moreover, different measuring line directions at a receiving terminal can be observed simultaneously, and each measuring point has two polarization directions, thus greatly improving the exploration efficiency and the data volume.

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：US20150338549A1

公开(公告)日：2015-11-26

申请号：US14397547

申请日：2014-01-26

Applicant: SHANDONG UNIVERSITY

Inventor： Shucai LI ,  Bin LIU ,  Lichao NIE ,  Lei XU ,  Xiangxue MA ,  Chuanwu WANG ,  Zhengyu Liu ,  Jie SONG ,  Huaifeng SUN ,  Xinji XU ,  Yao LI

IPC: G01V99/00

CPC classification number: G01V99/005 ,  G01V1/30 ,  G01V3/165 ,  G01V3/17 ,  G01V11/00

Abstract: The present invention discloses a tunnel construction large-scale integrated geophysical advanced detection model test device. The model test device includes a tunnel surrounding rock, a main tunnel model, a model test case, a water-containing geological structure device, a numerical control automated construction device and a main control chamber. The model test device is a large-scale integrated geophysical advanced detection model test device meeting the detection using a seismic wave method, an electromagnetic method and a direct-current electric method. By using the geophysical advanced detection model test device, the geophysical response features of the water-containing geological structure device in front of a tunnel face may be studied, multiple geophysical advanced detection forward and inversion methods for the water-containing geological structure device are verified, and the relationship between some geophysical detection method results and water burst quantity is studied, so as to lay a test foundation for the advanced prediction and water burst quantity prediction of the water-containing geological construction device in actual engineering.

Abstract translation: 本发明公开了一种隧道建设大型综合地球物理高级检测模型试验装置。 模型试验装置包括岩石隧道，主隧道模型，模型试验箱，含水地质结构装置，数控自动化施工装置和主控室。 模型试验装置是利用地震波法，电磁法和直流电法满足检测的大规模综合地球物理高级检测模型试验装置。 通过使用地球物理高级检测模型试验装置，可以研究隧道前面含水地质构造装置的地球物理响应特征，验证含水地质结构装置的多种地球物理进展检测正向和反演方法 研究了一些地球物理检测方法结果与水爆量之间的关系，为实际工程中含水地质施工装置的先进预测和水爆量预测奠定了考察基础。