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1.发明公开公开(公告)号：US20240012094A1
公开(公告)日：2024-01-11
申请号：US18006376
申请日：2021-07-06
摘要： Examples of the disclosure relate to apparatus (101) for positioning mobile devices (105). The apparatus (101) comprises means for: obtaining a time of arrival of at least one audio signal (131) at a mobile device (105), wherein the audio signal (131) is generated with a photoacoustic effect; and using the time of the arrival of the audio signal (131) to estimate a location of the mobile device (105).
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公开(公告)号：US20230319523A1
公开(公告)日：2023-10-05
申请号：US18103624
申请日：2023-01-31
发明人： Wilfred Edwin Booij , Endre Bakka
CPC分类号： H04W4/30 , G01S5/0036 , G01S5/18 , G01S5/0081 , G01S1/725 , G01S1/76 , G01S1/751 , H04B11/00 , H04W4/80
摘要： The present disclosure relates to a location determination system that includes acoustic transmitting devices, location tags, and a wireless mesh network, where the wireless mesh network uses battery-powered devices. A location tag receives acoustic signals (e.g., ultrasound signals) from an acoustic transmitting device. Clocks from members of the wireless mesh network are synchronized by observation of clock pairings, each clock pair formed by respective clocks in a transmitting device that transmits a message and a receiving device that receives the message. By analyzing the observed clock pairings, a best fit between the clock pairings may be determined. After selecting a reference clock, an acoustic transmission schedule may be propagated to the respective acoustic transmitting device.
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公开(公告)号：US20230318889A1
公开(公告)日：2023-10-05
申请号：US18100599
申请日：2023-01-24
发明人： Wilfred Edwin Booij
CPC分类号： H04L27/16 , G01S1/753 , H04B11/00 , H04L1/0033 , H04L27/12 , G01S2201/025
摘要： A transmitter is disclosed. The transmitter includes a clock configured to generate one or more output clock signals. The transmitter further includes at least one frequency divider configured to generate a plurality of divided frequencies based on the one or more output clock signals, and a modulator. The transmitter also includes at least one antenna or transducer configured to transmit modulated data. The transmitter includes a memory configured to store instructions, and at least one processor configured to execute instructions performing operations including mapping data to a decimal code value of a plurality of decimal code values, converting the decimal code value to a shrinking base system, and selecting a set of frequencies among the plurality of divided frequencies based on the code value corresponding to the shrinking base system for the decimal code value. The modulator may be configured to modulate the decimal code value using the set of frequencies.
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公开(公告)号：US11438867B2
公开(公告)日：2022-09-06
申请号：US17145904
申请日：2021-01-11
申请人： ZEROKEY INC.
摘要： A range-finding and/or object-positioning system comprises one or more target devices; one or more reference devices communicating with said one or more target devices via one or more wireless signal sets, each wireless signal set comprising at least a first-speed signal having a first transmission speed and a second-speed signal having a second transmission speed, and the first transmission speed being higher than the second transmission speed; and at least one processing unit performing actions for determining at least one distance between one target device and one reference device based on the time difference between the receiving time of the first-speed signal and the receiving time of the second-speed signal of the wireless signal set communicated between said reference and target devices.
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公开(公告)号：US20220260663A1
公开(公告)日：2022-08-18
申请号：US17622584
申请日：2020-08-28
摘要： A practically implementable robust direction-of-arrival (DoA) estimation approach that is resistant to localization errors due to mobility, multipath reflections, impulsive noise, and multiple-access interference. As part of the disclosed invention the inventors consider infrastructure-less 3D localization of autonomous underwater vehicles (AUVs) with no GPS assistance and no availability of global clock synchronization. The proposed method can be extended to challenging communication environments and applied for the localization of assets/objects in space, underground, intrabody, underwater and other complex, challenging, congested and sometimes contested environments. Each AUV leverages known-location beacon signals to self-localize and can simultaneously report its sensor data and measurement location. The approach uses two known location beacon nodes, where the beacons are single-hydrophone acoustic nodes that are deployed at known locations and transmit time-domain coded signals in a spread-spectrum fashion.
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公开(公告)号：US20220144395A1
公开(公告)日：2022-05-12
申请号：US17096246
申请日：2020-11-12
IPC分类号： B63G8/00 , B63B79/40 , G05D1/06 , B63B22/00 , B63B79/15 , B63B21/50 , B63B49/00 , B63B35/04 , G01S1/08 , G01S1/70 , G01S1/04 , G01S1/74 , G01S1/76 , H04B10/25
摘要： An underwater communications network may include spaced apart nodes on a bottom of a body of water. The underwater communications network may also include fiber optic cabling connecting the spaced apart nodes. Each node may include a frame, a node short-range navigation device carried by the frame, and an unmanned underwater vehicle (UUV) carried by the frame after delivering a fiber optic cable along a navigation path from an adjacent node. The UUV may be configured to cooperate with the node short-range navigation device during an end portion of the navigation path adjacent the frame.
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公开(公告)号：US20210243557A1
公开(公告)日：2021-08-05
申请号：US17049548
申请日：2019-04-23
发明人： Conor Brennan , Derek Molloy , Martin Trainor
摘要： The invention provides a navigation device comprising a docking portion configured to securely adhere to a surface and a unit having at least one of a visual, an audio or tactile indicator. The present invention provides a device which the user attaches to a wall or door or ground surface entered on the way into a building. A number of fixed devices then assist the user to retrace their route out of the building. In addition, the device can be configured to transmit essential information to a user located outside the building. The devices can also be configured to form a novel navigation communication system.
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公开(公告)号：US20210235411A1
公开(公告)日：2021-07-29
申请号：US17145904
申请日：2021-01-11
申请人： ZEROKEY INC.
摘要： A range-finding and/or object-positioning system comprises one or more target devices; one or more reference devices communicating with said one or more target devices via one or more wireless signal sets, each wireless signal set comprising at least a first-speed signal having a first transmission speed and a second-speed signal having a second transmission speed, and the first transmission speed being higher than the second transmission speed; and at least one processing unit performing actions for determining at least one distance between one target device and one reference device based on the time difference between the receiving time of the first-speed signal and the receiving time of the second-speed signal of the wireless signal set communicated between said reference and target devices.
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公开(公告)号：US20200370892A1
公开(公告)日：2020-11-26
申请号：US16418713
申请日：2019-05-21
申请人： Raytheon Company
发明人： Andrew Wilby
摘要： An underwater celestial navigation beacon configured to provide position information is disclosed. The underwater celestial navigation beacon can include a data store configured to store an astronomical model of the moon. The underwater celestial navigation beacon can include an inertial measurement unit (IMU) operable to capture IMU data that includes three-axis acceleration data and three-axis rate gyroscopic data. The underwater celestial navigation beacon can include a controller. The controller can determine a latitude of the underwater celestial navigation beacon using the three-axis rate gyroscopic data. The controller can determine a longitude of the underwater celestial navigation beacon based on a gravitational pull of the moon, using the three-axis acceleration data and the astronomical model of the moon. The controller can determine the position information for the underwater celestial navigation beacon based on the latitude and longitude.
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公开(公告)号：US10609526B2
公开(公告)日：2020-03-31
申请号：US15868101
申请日：2018-01-11
申请人： CenTrak, Inc.
发明人： Karuppiah Annamalai
摘要： A real-time location system including a backbone communication network having a plurality of network access point devices and a real-time location system server, a plurality of monitor devices where each monitor device being located at a location around a facility, each of the plurality of monitor devices being configured to transmit a unique monitor identification code using a secondary transmission technology, each of the monitor identifications codes being mapped to a single location in the facility at which a monitor device is located, each of the monitor devices further being configured to transmit an RF beacon using a first RF protocol, and at least one tag being configured to receive, detect and retransmit the monitor identification code back to at least one of the plurality of monitor devices using a second RF protocol.
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