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公开(公告)号：US20180091237A1
公开(公告)日：2018-03-29
申请号：US15827297
申请日：2017-11-30
IPC分类号： H04B13/02 , H04W4/22 , H04L27/26 , H04L25/49 , H04B1/40 , H01Q1/22 , H04B1/38 , H04B1/034 , H01Q7/00 , H01Q1/27
CPC分类号： H04B13/02 , H01Q1/2291 , H01Q1/273 , H01Q7/00 , H04B1/034 , H04B1/38 , H04B1/3827 , H04B1/40 , H04L25/4902 , H04L27/26 , H04L27/2602 , H04W4/90
摘要： There is provided a Through the Earth Emergency Radio (TER) method and apparatus for creating a communications link that can penetrate the earth or other thick, solid barriers. The communication link is used to connect mobile radios or other conventional wireless devices located below ground and on the surface. The through the earth communication link uses a multi-carrier modulation method that minimizes the impact of AC power line noise by locating each carrier between the harmonic frequencies of the AC power line noise.
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公开(公告)号：US09866333B2
公开(公告)日：2018-01-09
申请号：US15304892
申请日：2015-04-24
IPC分类号： H04B13/02 , H01Q7/00 , H04B1/38 , H04B1/3827 , H04B1/40 , H04L27/26 , H04L25/49 , H01Q1/22 , H04B1/034 , H04W4/22 , H01Q1/27
CPC分类号： H04B13/02 , H01Q1/2291 , H01Q1/273 , H01Q7/00 , H04B1/034 , H04B1/38 , H04B1/3827 , H04B1/40 , H04L25/4902 , H04L27/26 , H04L27/2602 , H04W4/90
摘要： There is provided a Through the Earth Emergency Radio (TER) method and apparatus for creating a communications link that can penetrate the earth or other thick, solid barriers. The communication link is used to connect mobile radios or other conventional wireless devices located below ground and on the surface. The through the earth communication link uses a multi-carrier modulation method that minimizes the impact of AC power line noise by locating each carrier between the harmonic frequencies of the AC power line noise.
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公开(公告)号：US09231799B2
公开(公告)日：2016-01-05
申请号：US14358747
申请日：2012-11-19
CPC分类号： H04L25/4902 , H01Q1/04 , H01Q7/00 , H04B5/0075 , H04B13/02
摘要： There is provided a Very Low Frequency (VLF) transmit antenna system, method, and apparatus for creating a magnetic field at low frequencies suitable for communications through the earth or other thick, solid barriers. At least two loop antennas are arranged such that a magnetic field of each one of the at least two loop antennas passes through each remaining one of the at least two loop antennas, thereby closely coupling the at least two loop antennas. A full bridge Pulse Width Modulated transmitter is directly connected to each loop antenna for driving the latter. When a loop of a given loop antenna is broken and its magnetic field collapses, the transmitters connected to the remaining loop antennas increase the current in the remaining loops to maintain a constant magnetic field.
摘要翻译： 提供了一种极低频（VLF）发射天线系统，方法和装置，用于在低频处产生适合于通过地球或其它厚实的屏障进行通信的磁场。 至少两个环形天线布置成使得至少两个环形天线中的每个环形天线中的每一个的磁场通过至少两个环形天线中的每个剩余的一个，从而紧密耦合至少两个环形天线。 全桥脉宽调制发射机直接连接到每个环形天线，用于驱动后者。 当给定环形天线的环路断开并且其磁场衰减时，连接到其余环路天线的发射器增加了剩余环路中的电流，以保持恒定的磁场。
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公开(公告)号：US20190383619A1
公开(公告)日：2019-12-19
申请号：US16469389
申请日：2017-12-20
摘要： Embodiments described herein relate to a magnetic positioning system and method that allows the position of a receiver to be determined in environments containing conducting material such as concrete. A number of transmitters create modulated magnetic fields which are distorted as they propagate through the conducting materials. A finite difference time domain (FDTD) simulation of the environment is used to generate an accurate model of the fields within the environment. A receiver is used to measure the field strength of each transmitter. The receiver position is determined by evaluating the misfit between the received fields and the values in the FDTD model.
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公开(公告)号：US20170187471A1
公开(公告)日：2017-06-29
申请号：US15304892
申请日：2015-04-24
CPC分类号： H04B13/02 , H01Q1/2291 , H01Q1/273 , H01Q7/00 , H04B1/034 , H04B1/38 , H04B1/3827 , H04B1/40 , H04L25/4902 , H04L27/26 , H04L27/2602 , H04W4/90
摘要： There is provided a Through the Earth Emergency Radio (TER) method and apparatus for creating a communications link that can penetrate the earth or other thick, solid barriers. The communication link is used to connect mobile radios or other conventional wireless devices located below ground and on the surface. The through the earth communication link uses a multi-carrier modulation method that minimizes the impact of AC power line noise by locating each carrier between the harmonic frequencies of the AC power line noise.
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公开(公告)号：US20140314129A1
公开(公告)日：2014-10-23
申请号：US14358747
申请日：2012-11-19
CPC分类号： H04L25/4902 , H01Q1/04 , H01Q7/00 , H04B5/0075 , H04B13/02
摘要： There is provided a Very Low Frequency (VLF) transmit antenna system, method, and apparatus for creating a magnetic field at low frequencies suitable for communications through the earth or other thick, solid barriers. At least two loop antennas are arranged such that a magnetic field of each one of the at least two loop antennas passes through each remaining one of the at least two loop antennas, thereby closely coupling the at least two loop antennas. A full bridge Pulse Width Modulated transmitter is directly connected to each loop antenna for driving the latter. When a loop of a given loop antenna is broken and its magnetic field collapses, the transmitters connected to the remaining loop antennas increase the current in the remaining loops to maintain a constant magnetic field.
摘要翻译： 提供了一种极低频（VLF）发射天线系统，方法和装置，用于在低频处产生适合于通过地球或其它厚实的屏障进行通信的磁场。 至少两个环形天线布置成使得至少两个环形天线中的每个环形天线中的每一个的磁场通过至少两个环形天线中的每个剩余的一个，从而紧密耦合至少两个环形天线。 全桥脉宽调制发射机直接连接到每个环形天线，用于驱动后者。 当给定环形天线的环路断开并且其磁场衰减时，连接到其余环路天线的发射器增加了剩余环路中的电流，以保持恒定的磁场。
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公开(公告)号：US09450684B2
公开(公告)日：2016-09-20
申请号：US14377705
申请日：2013-02-08
CPC分类号： H04B13/02 , H04Q9/00 , H04Q2209/40 , H04Q2209/883
摘要： A system, method and apparatus for controlling buried devices by means of a very low frequency (VLF) modulated magnetic field capable of providing through-the-earth (TTE) communications. The system comprises a plurality of VLF transmission loop antennas positioned to cover a desired coverage area and configured to transmit a magneto-inductive signal to a desired operating depth. One or more VLF receivers are configured to receive one or more magneto-inductive signals from the one or more VLF transmission antennas. The VLF receivers are operatively connected to the buried devices, and configured to output a control signal thereto in response to the magneto-inductive signals. The plurality of VLF transmission loop antennas may be square or rectangular antennas positioned in an array to cover the desired coverage area, the VLF transmission loop antennas sized and sufficiently powered to transmit the magneto-inductive signal to the desired operating depth.
摘要翻译： 一种用于通过能够提供通过地球（TTE）通信的极低频（VLF）调制磁场来控制掩埋器件的系统，方法和装置。 该系统包括多个VLF传输环路天线，其定位成覆盖期望的覆盖区域并且被配置为将磁感应信号传输到期望的操作深度。 一个或多个VLF接收器被配置为从一个或多个VLF发送天线接收一个或多个磁感应信号。 VLF接收器可操作地连接到掩埋设备，并且被配置为响应于磁感应信号而向其输出控制信号。 多个VLF传输环路天线可以是位于阵列中以覆盖期望覆盖区域的正方形或矩形天线，VLF传输环路天线的尺寸和功率足以将磁感应信号传输到期望的操作深度。
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公开(公告)号：US11118912B2
公开(公告)日：2021-09-14
申请号：US16469389
申请日：2017-12-20
摘要： Embodiments described herein relate to a magnetic positioning system and method that allows the position of a receiver to be determined in environments containing conducting material such as concrete. A number of transmitters create modulated magnetic fields which are distorted as they propagate through the conducting materials. A finite difference time domain (FDTD) simulation of the environment is used to generate an accurate model of the fields within the environment. A receiver is used to measure the field strength of each transmitter. The receiver position is determined by evaluating the misfit between the received fields and the values in the FDTD model.
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公开(公告)号：US10277335B2
公开(公告)日：2019-04-30
申请号：US15827297
申请日：2017-11-30
IPC分类号： H01Q7/00 , H04B13/02 , H04W4/90 , H04B1/38 , H04B1/3827 , H04B1/40 , H04L27/26 , H04L25/49 , H01Q1/22 , H04B1/034 , H01Q1/27
摘要： There is provided a Through the Earth Emergency Radio (TER) method and apparatus for creating a communications link that can penetrate the earth or other thick, solid barriers. The communication link is used to connect mobile radios or other conventional wireless devices located below ground and on the surface. The through the earth communication link uses a multi-carrier modulation method that minimizes the impact of AC power line noise by locating each carrier between the harmonic frequencies of the AC power line noise.
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