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公开(公告)号：US20250070891A1
公开(公告)日：2025-02-27
申请号：US18720796
申请日：2022-12-14
Applicant: BAE SYSTEMS PLC
Inventor： Mark Edgar Bray
IPC: H04B13/02
Abstract: In some examples, an apparatus for optical underwater data transmission comprises an optical transmitter configured to generate an optical signal for a short range underwater optical communications channel, wherein the optical transmitter comprises a source of electromagnetic radiation configured to generate an optical signal with a selected wavelength.
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公开(公告)号：US20250065743A1
公开(公告)日：2025-02-27
申请号：US18411780
申请日：2024-01-12
Applicant: Pioneer Material Precision Tech Co., Ltd.
Inventor： Tai-Yu CHEN , Li-Yuan YEH , Jian-Jhih HUANG , Chih-Wei SHEN , Chang-Qi ZHANG
Abstract: A wireless charging method for charging an underwater moving device is implemented by a charging device. The charging device receives electricity from a cable, and includes a first underwater wireless communication unit, a position holding unit, a first control unit, and a wireless charging transmitter. The underwater moving device includes a second underwater wireless communication unit, a wireless charging receiver, and a rechargeable battery. The first underwater wireless communication unit obtains moving device information by communicating with the second underwater wireless communication unit. The position holding unit holds the underwater moving device at a charging location, and generates a positioning success signal after the underwater moving device is held at the charging location. Upon receiving the positioning success signal, the first control unit controls the wireless charging transmitter to charge the rechargeable battery based on the moving device information.
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公开(公告)号：US12136424B2
公开(公告)日：2024-11-05
申请号：US18094056
申请日：2023-01-06
Applicant: Teledyne Instruments, Inc.
Inventor： Ken Scussel , Thomas W. Altshuler , Andrey K. Morozov , Michael J. Coryer
Abstract: Disclosed is a diver's voice communication system which utilizes AI speech recognition, speech-to-text conversion with the ability to adapt to diver speech distortion resulting from hyperbaric helium-oxygen conditions and text transmission using underwater acoustic digital communication. Additionally, the communication system provides the ability to use speech commands in a digital form to control underwater autonomous devices. Further, the digital communication system provides the ability to track and communicate with a large number of divers or with select divers from a large group.
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公开(公告)号：US20240259113A1
公开(公告)日：2024-08-01
申请号：US18561251
申请日：2021-05-19
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hiroyuki FUKUMOTO , Yosuke FUJINO , Toshimitsu TSUBAKI , Miharu OIWA , Yuya ITO , Marina NAKANO
Abstract: According to an aspect of the present invention, there is provided a communication apparatus including: a synchronizer configured to perform synchronization processing according to a Doppler shift on a reception signal; and an equalizer configured to perform equalization processing on a reception signal on which the synchronization processing has been performed, in which the synchronizer includes a correlator configured to output a correlation between a reception signal and a known preamble sequence and a correlation between the reception signal and a known postamble sequence, a slide correlator configured to output a sliding correlation based on an output of the correlator, and a Doppler estimator configured to estimate a Doppler shift based on the sliding correlation of the slide correlator
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公开(公告)号：US12019154B2
公开(公告)日：2024-06-25
申请号：US16774866
申请日：2020-01-28
Applicant: L3 Technologies, Inc.
Inventor： Jonathan C. Crowell
CPC classification number: G01S15/66 , G01S3/808 , G01S5/22 , H04B13/02 , H04W84/005
Abstract: A system where a large number of underwater devices can transmit their precise position relative to a fixed underwater beacon, by transmitting two short duration, precisely timed acoustic tones (pings). The arrival time of the pulses at the fixed underwater transceiver beacon will relay the transmitter's precise position relative to that beacon. The two pings code for two numbers; either the range and bearing or an X, Y coordinate of each object with respect to the beacon. Data messages can be sent to and received from the beacon, used for command, control and status. The pulses can be a single frequency and have duration of around a 1 ms and operate one or many frequencies to allow multiple cycles to be overlapped in time. This coding scheme allows many devices to send the data simultaneously in the cycle for group tracking from last position or as independent cycles for unambiguous tracking. The transducers used in the system can be omni-directional hydrophones. The tracking grid size is a function of the acoustic frequency chosen and range from 1000 m for 40 KHz and 6000 m for 8 kHz. The system requires that all nodes in the system keep precise synchronized time.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20240090047A1
公开(公告)日：2024-03-14
申请号：US18450360
申请日：2023-08-15
Applicant: Apple Inc.
Inventor： Ajoy K. SINGH , Ajay kumar S. GUPTA , Prathyusha PALLERLAMUDI
Abstract: This Application sets forth techniques for managing the cellular connectivity state of a submerged wireless device. The wireless device can include sensors that analyze environmental conditions to determine when the wireless device is (or is not) submerged underwater as well as at what depth the wireless device is submerged underwater. The sensors can also determine different types of aquatic activity in which a user of the wireless device is currently engaged, such as swimming, snorkeling, free diving, and scuba diving. In turn, the wireless device can utilize this information to manage its cellular connectivity state in order to avoid wasteful consumptions of energy. In particular, the techniques enable the submerged wireless device to eliminate any existing cellular connection as well as connection reattempts so long as they are unlikely to succeed. Moreover, the techniques enable the wireless device to execute connection reattempts when they are appropriate and likely to succeed.
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7.发明公开公开(公告)号：US20240048250A1
公开(公告)日：2024-02-08
申请号：US18266896
申请日：2020-12-16
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kazumitsu SAKAMOTO , Kento YOSHIZAWA , Takeshi KINOSHITA , Etsushi YAMAZAKI , Takayuki MIZUNO , Takuya OHARA
Abstract: An aspect of the present invention is a wireless communication device including a water flow generator that controls a shape of a partial region on a water surface, and
an emission unit that emits a wave carrying information toward the region.-
公开(公告)号：US11866998B2
公开(公告)日：2024-01-09
申请号：US17109836
申请日：2020-12-02
Applicant: ERDOS MILLER, INC. , BLACK DIAMOND OILFIELD RENTALS LLC
Inventor： Kenneth Miller , David Erdos , Abraham Erdos
Abstract: In some embodiments, a system including a tool drill string having a downhole device is disclosed. The downhole device includes a memory storing instructions and a downhole processor configured to execute the instructions to operate in a first transmission mode by default. The downhole processor is communicatively coupled to an uphole processor via the first transmission mode. The downhole processor is further to transmit, via a second transmission mode, a message to the uphole processor, determine whether a response is received, via the second transmission mode, from the uphole processor, and responsive to determining the response is received from the uphole processor, switch from the first transmission mode to the second transmission mode.
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9.发明公开公开(公告)号：US20230327782A1
公开(公告)日：2023-10-12
申请号：US18158806
申请日：2023-01-24
Inventor： Tatsuro UCHIDA , Masahiko NAKAZONO
CPC classification number: H04B13/02 , F15B19/00 , G01L1/2262
Abstract: According to the present embodiment, a hydraulic device measurement apparatus comprises a first wireless communication portion, and a second wireless communication portion. A transmitter and a receiver of the first wireless communication portion are arranged along the rotation axis of the rotating portion, and a transmitter and a receiver of the second wireless communication portion are arranged in the air along the rotation axis. The first wireless communication portion and the second wireless communication portion transmit and receive the transfer signal along the rotation axis of the rotating portion.
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公开(公告)号：US11750299B2
公开(公告)日：2023-09-05
申请号：US17623008
申请日：2019-07-01
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hiroyuki Fukumoto , Yosuke Fujino , Marina Nakano , Kazunori Akabane
CPC classification number: H04B11/00 , H04B13/02 , H04L5/0048 , H04L5/0082 , H04L25/0202
Abstract: A communication device includes a channel estimation unit configured to estimate an impulse response based on signals of sound waves received by each of a plurality of hydrophones, a long delay removal unit configured to remove a long-delay impulse response from the impulse response to generate a post-removal impulse response, a weighting factor calculation unit configured to calculate a weighting factor based on the post-removal impulse response, and a synthesizing unit configured to synthesize the signals received by each of the plurality of hydrophones based on the weighting factor.
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