公开(公告)号：US11768058B2

公开(公告)日：2023-09-26

申请号：US17000263

申请日：2020-08-21

Applicant: TSINGHUA UNIVERSITY ,  BEIJING INSTITUTE OF SATELLITE ENVIRONMENTAL ENGINEERING

Inventor： Xiao-Ping Zheng ,  Zhen-Yuan Sun ,  Hua Geng ,  Xiao-Jiao Deng ,  Bin Wang

IPC: F41H11/136 ,  G01V3/10

CPC classification number: F41H11/136 ,  G01V3/10

Abstract: A detection method for discovering an unexploded ordnance includes: surrounding a detection region with a transmitting coil and surrounding a detection site with a second receiving coil; conducting the transmitting coil with a second electric current; respectively acquiring a plurality of second feedback signals at a plurality of second feedback time points; partitioning the transmitting coil into a plurality of dipoles, and acquiring a plurality of distance values r respectively between the plurality of dipoles and the detection site; respectively calculating feedback depths according to feedback time periods; respectively calculating apparent resistivity values corresponding to the feedback depths; obtaining an apparent resistivity distribution in depth at the detection site according to the apparent resistivity values and the feedback depths; and judging whether there is any unexploded ordnance at the detection site according to the apparent resistivity distribution in depth.

公开(公告)号：US11372125B2

公开(公告)日：2022-06-28

申请号：US16847659

申请日：2020-04-14

Applicant: TSINGHUA UNIVERSITY ,  BEIJING INSTITUTE OF SATELLITE ENVIRONMENTAL ENGINEERING

Inventor： Xiao-Ping Zheng ,  Zhen-Yuan Sun ,  Bin Wang ,  Hua Geng ,  Xiao-Jiao Deng

IPC: G01V3/08 ,  G01V3/165 ,  G01V3/17

Abstract: An amphibious portable magnetism detector includes a first housing, a first wiring tube, a first magnetic field sensor, and a central control device. The first housing defines a first inner space and a first through hole in communication with the first inner space. The first wiring tube is connected to the first housing with a first leak-tight seal formed between them, and in communication with the first inner space via the first through hole. The first magnetic field sensor is disposed in the first inner space and configured to detect a magnetic field at a target area and generate a first detection signal. The central control device is electrically connected to the first magnetic field sensor and configured to receive the first detection signal and output a first magnetic field value according to the first detection signal.

公开(公告)号：US11293860B2

公开(公告)日：2022-04-05

申请号：US17121672

申请日：2020-12-14

Applicant: TSINGHUA UNIVERSITY

Inventor： Xiao-Ping Zheng ,  Bin Cao ,  Hua Geng

IPC: G01N21/3586 ,  G01J3/28

Abstract: The present application provides a terahertz spectral imaging data reconstruction method, an apparatus, a device, and a storage medium. The method includes: scanning a target object according to the first spatial interval and the first time domain sampling period to acquire the first terahertz spectral data; scanning the target object according to the second spatial interval and the second time domain sampling period to acquire the second terahertz spectral data, the first spatial interval is larger than the second spatial interval, and the first time domain sampling period is larger than the second time domain sampling period; and reconstructing the second terahertz spectral data on basis of the first terahertz spectral data by using the preset reconstruction method to obtain the third terahertz spectral data.

公开(公告)号：US10571393B2

公开(公告)日：2020-02-25

申请号：US16445219

申请日：2019-06-19

Applicant: Tsinghua University

Inventor： Xiao-Ping Zheng ,  Xiao-Jiao Deng ,  Hua Geng

IPC: G01N21/3581 ,  G01J3/42

Abstract: The present disclosure relates to a terahertz-based high-risk chemical detecting device, which includes a terahertz wave generating unit, a terahertz wave transmitting and receiving unit and an echo analysis unit. The terahertz wave generating unit is configured for generating a terahertz detection signal, a terahertz reference signal and a terahertz local oscillation signal. The terahertz wave transceiver unit is configured to transmit the terahertz detection signal and the terahertz reference signal to a high-risk chemical to be tested, and receive information about carrying a high-risk chemical to be tested. The terahertz echo signal is configured to analyze the terahertz echo signal and the terahertz local oscillation signal to obtain information about a high-risk chemical to be tested. The present disclosure also relates to a terahertz-based high-risk chemical detecting method.