公开(公告)号：US20230129831A1

公开(公告)日：2023-04-27

申请号：US17510895

申请日：2021-10-26

申请人： Woods Hole Oceanographic Institution

发明人： Robin H. Littlefield ,  Karen Soenen ,  Greg Packard ,  Jeff Kaeli

IPC分类号： G01V3/165 ,  B63G8/00 ,  B63G8/39 ,  G01S15/89

摘要： Infrastructure monitoring relevant to offshore power cable inspection through the use of an Autonomous Underwater Vehicle (“AUV”) carrying a small magnetometer to localize and map underwater power cables. The method comprises using an AUV to cover a series of transects across a known cable corridor to localize subsea and buried power transmission cables in the marine environment for mapping and/or subsequent navigational aiding.

公开(公告)号：US11567230B1

公开(公告)日：2023-01-31

申请号：US17679137

申请日：2022-02-24

申请人： University of Science and Technology Beijing

发明人： Dazhao Song ,  Xueqiu He ,  Menghan Wei

IPC分类号： G01V3/12 ,  G01V3/38 ,  G01V3/165

摘要： A direction-finding and positioning system of electromagnetic emission of coal or rock fracture includes a three-axis electromagnetic sensor array, a signal acquisition module and a direction-finding and positioning terminal; the three-axis electromagnetic sensor array is composed of at least four three-axis electromagnetic sensors configured to synchronously sense magnetic field strength in three-axis direction based on a tunnel magneto resistance technology, and obtain a real magnetic field vector in space by measuring; the signal acquisition module is configured to acquire magnetic field vector variable information of multiple measuring points in real-time, and after extracting magnetic field vector variable parameters, transmitting the magnetic field vector variable parameters to the direction-finding and positioning terminal; the direction-finding and positioning terminal is configured to perform direction-finding and positioning calculations according to the magnetic field vector variable parameters received, and performing a three-dimensional dynamic visual display to positioning results, positioning time, and positioning coordinates.

公开(公告)号：US20220276404A1

公开(公告)日：2022-09-01

申请号：US17629855

申请日：2020-07-27

申请人： Minelab Electronics Pty. Limited

发明人： Benjamin James Whelan ,  Gregory Peter Harmer ,  Ivan Anthony Curtis ,  Philip Shane Wahrlich

IPC分类号： G01V3/38 ,  G01V3/165

摘要： Provided is a method for detecting a target using a metal detector, including transmitting a transmit magnetic field using a transmitter; determining positions of a receiver of the metal detector as the receiver changes positions; receiving receive magnetic fields due to the transmit magnetic field to produce receive signals associated with positions using the receiver and receive electronics; and producing an audio output signal. The audio output signal is dependent on one or more receive signals associated with positions related to a current determined position in a selected relationship.

公开(公告)号：US20220221612A1

公开(公告)日：2022-07-14

申请号：US17687126

申请日：2022-03-04

申请人： HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

发明人： Guohong FU ,  Songyuan FU ,  Hui CHENG ,  Tianchun YANG

IPC分类号： G01V3/38 ,  G01V3/10 ,  G01V3/165

摘要： A device for reducing turn-off time of a transient electromagnetic transmitting signal includes a transmitting coil, a first electronic switch to control connection mode of the transmitting coil and a second electronic switch configured to form a bridge arm. The transmitting coil is a twisted pair including a first wire and a second wire. The first wire is connected to one end of the second electronic switch. The other end of the second electronic switch is connected to one end of the first electronic switch. The other end of the first electronic switch is connected to the second wire. The connection mode of the transmitting coil includes head-to-head connection, head-to-tail connection and tail-to-tail connection between the first wire and the second wire. The first wire and the second wire are connected to form a transmitting loop.

公开(公告)号：US11373387B2

公开(公告)日：2022-06-28

申请号：US17161220

申请日：2021-01-28

申请人： The Government of the United States of America, as represented by the Secretary of Homeland Security

发明人： William Hastings ,  James Gilkeson ,  Douglas MacIvor

IPC分类号： G06V10/147 ,  G07C9/15 ,  G07C9/32 ,  G01N23/10 ,  G06K9/62 ,  G07C9/28 ,  G07C9/10 ,  G06Q50/26 ,  G01V3/165 ,  G01V5/00 ,  G06V10/40 ,  G06V20/10 ,  G06Q10/00 ,  G01V3/08

摘要： Various embodiments are directed toward systems and methods relating to security screening. For example, a screening system includes chamber scanners oriented to scan different heights corresponding to different respective portions of a user, to identify whether the user is carrying an item that is to be divested. The screening system also includes a divestment scanner configured to obtain a detailed item characterization of the item divested from the user.

公开(公告)号：US20220196873A1

公开(公告)日：2022-06-23

申请号：US17528214

申请日：2021-11-17

申请人： OMRON CORPORATION

发明人： Ryoji OKAZAKI ,  Kohei FUJIO

IPC分类号： G01V3/165 ,  G01V3/10 ,  G01R33/00 ,  G01N33/38

摘要： A metal detector 20 includes a detection signal acquisition unit 31, a threshold value setting and updating unit 32, and a determination unit 33. The detection signal acquisition unit 31 acquires a detection signal that changes according to the detection strength for a rebar W1 contained in concrete W, on the surface of the concrete W. The threshold value setting and updating unit 32 sets a threshold value in order to determine the presence or absence of the rebar W1 on the basis of the maximum value and/or the minimum value included in the acquisition results for the detection signal acquired by the detection signal acquisition unit 31. The determination unit 33 determines the presence or absence of the rebar W1 by using the threshold value set in the threshold value setting and updating unit 32.

公开(公告)号：US11333786B1

公开(公告)日：2022-05-17

申请号：US16551653

申请日：2019-08-26

申请人： SeeScan, Inc.

发明人： Stephanie M. Bench ,  Mark S. Olsson

IPC分类号： G01V3/15 ,  G01V3/10 ,  G01V15/00 ,  G01V3/165

摘要： Systems and methods for locating buried utilities in conjunction with associated electromagnetic marker devices are disclosed. A marker device may include a marker device antenna and an electronic circuit operatively coupled to the marker device antenna. The electronic circuit may include at least two resonant circuits, including a first resonant circuit formed in combination with the marker device antenna for receiving an excitation signal at a first frequency from a marker excitation device. The received excitation signal may be converted into a power supply by a power circuit for powering the electronic circuit. Responsive to the received excitation signal, a processing element provided in the electronic circuit may generate an output signal at a second frequency, which is substantially different from the first frequency. The generated output signal may be tuned by a second resonant circuit and provided to the marker device antenna.

公开(公告)号：US11175427B2

公开(公告)日：2021-11-16

申请号：US15681409

申请日：2017-08-20

申请人： SeeScan, Inc.

发明人： Mark S. Olsson ,  David A. Cox ,  Michael J. Martin ,  Ray Merewether ,  Amos H. Jessup

IPC分类号： G01V3/10 ,  G01V3/15 ,  G01B7/26 ,  G01V3/165

摘要： Systems for locating buried or hidden utilities including a portable locator and associated portable transmitter are disclosed. The portable locator may include a magnetic field measurement module for determining a current signal in the buried utility based on a received magnetic field, and a receiver module for receiving data from the portable transmitter. The portable transmitter may include a data transmitter module for sending information associated with a current signal provided to the buried utility to the portable receiver module.

公开(公告)号：US11169296B2

公开(公告)日：2021-11-09

申请号：US15592410

申请日：2017-05-11

申请人： MILWAUKEE ELECTRIC TOOL CORPORATION

发明人： Evans H. Nguyen ,  Jason R. Crowe ,  Scott D. Bublitz ,  Mike N. Jones ,  Wai Nang Tse ,  Pak Fai Siu ,  Man Kit Ho

IPC分类号： G01V3/165 ,  G01V3/10 ,  G01V3/15 ,  H01M50/213 ,  G01R19/15 ,  H01M10/052

摘要： Embodiments of the invention relate to a wall scanner that includes a housing, a plurality of sensors, a display, and a control section. The housing includes a handle portion and a body portion. The handle portion is adapted to receive a removable and rechargeable battery pack such as a high-voltage lithium-ion (“Li-Ion”) battery pack. The body portion of the housing encloses the plurality of sensing devices, such as, for example, capacitive plate sensors for sensing the presence of a stud behind a surface, a D-coil sensor for identifying the presence of metal behind the surface, and a non-contact voltage sensor for detecting the presence of live wires carrying AC currents. The display is configured to display, among other things, the location of an object behind the surface in real-time, the depth of an object behind the surface, and whether an object behind the surface is ferrous or non-ferrous. The control section includes a plurality of actuation devices for controlling the functions and operations of the wall scanner, such as the scanning mode.

公开(公告)号：US11143788B2

公开(公告)日：2021-10-12

申请号：US15572444

申请日：2015-05-08

申请人： STATOIL PETROLEUM AS

发明人： Emmanuel Causse ,  Anh Kiet Nguyen ,  Janniche Iren Nordskag ,  Frank Agnar Maaø

IPC分类号： G01V99/00 ,  G01V3/08 ,  G06F17/16 ,  G06F111/10 ,  G01V3/165

摘要： A method of solving a geophysical inverse problem for estimating a physical parameter, the method comprising providing a model vector representing the physical parameter, transforming the model vector by a first operator to provide a first transformed model vector, solve the inverse problem for the first transformed model vector to provide a first solution, transforming the model vector by a second operator to produce a second transformed model vector, solve the inverse problem for the second transformed model vector to provide a second solution, calculating a weighted sum of the first solution and the second solution.