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公开(公告)号：US20240053431A1
公开(公告)日：2024-02-15
申请号：US18260292
申请日：2021-12-02
发明人： Yang LIU , Yanxiong LIU , Menghao LI , Guanxu CHEN
CPC分类号： G01S5/183 , G01S5/30 , G01S2205/04
摘要： The disclosure provides a broadcast-type underwater navigation positioning system and method, wherein the system comprises a base station network consisting of a plurality of underwater base stations distributed on a seabed and a to-be-positioned user terminal located underwater, wherein the underwater base station comprises a bottom-mounted sonar and an mooring sonar, the bottom-mounted sonar and the mooring sonar are connected through a cable and are configured for ranging and communication through an underwater acoustic signal, the mooring sonar is integrated with an inertial measurement unit I, and the user terminal is provided with a passive sonar configured to unidirectionally receive an underwater acoustic signal sent by the mooring sonar for ranging and communication. The underwater navigation positioning system and method disclosed in the present invention can expand the service range of the base station, increase the capacity of the user terminal and improve the precision of regional sound velocity products.
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公开(公告)号：US20230288578A1
公开(公告)日：2023-09-14
申请号：US18015483
申请日：2020-09-30
发明人： Yang LIU , Menghao LI , Fangli QIAO , Li TIAN , Guanxu CHEN , Yanxiong LIU
CPC分类号： G01S19/44 , G01C13/004 , G01S19/40
摘要： A new GNSS-based real-time high-precision wave measurement method, wherein the GNSS phase, pseudo-range, Doppler frequency shift observations and broadcast ephemerides are collected by a GNSS receiver, and antenna carried by a sea surface carrier; the three-dimensional speeds of a carrier are acquired using an epoch difference of phase observations; and wave element information are then solved. The wave element information can also be obtained by integrating the speeds for a certain duration and removing a linear trend term to obtain a time-dependent displacement variations. No additional precise differential correction is needed, thereby saving on service costs and communication costs of precise differential corrections. High-precision wave element information is obtained in real time, and locally stored in a buoy or periodically returned by communication, thereby expanding the working range of GNSS-based ocean wave measurement.
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