US 12,411,205 B2
Broadcast-type underwater navigation positioning system and method
Yang Liu, Shandong (CN); Yanxiong Liu, Shandong (CN); Menghao Li, Shandong (CN); and Guanxu Chen, Shandong (CN)
Assigned to FIRST INSTITUTE OF OCEANOGRAPHY, MINISTRY OF NATURAL RESOURCES, Qingdao (CN)
Appl. No. 18/260,292
Filed by FIRST INSTITUTE OF OCEANOGRAPHY, MINISTRY OF NATURAL RESOURCES, Shandong (CN)
PCT Filed Dec. 2, 2021, PCT No. PCT/CN2021/135051
§ 371(c)(1), (2) Date Jul. 3, 2023,
PCT Pub. No. WO2023/082382, PCT Pub. Date May 19, 2023.
Claims priority of application No. 202111344256.0 (CN), filed on Nov. 15, 2021.
Prior Publication US 2024/0053431 A1, Feb. 15, 2024
Int. Cl. G01S 5/18 (2006.01); G01S 5/30 (2006.01)
CPC G01S 5/183 (2013.01) [G01S 5/30 (2013.01); G01S 2205/04 (2020.05)] 10 Claims
OG exemplary drawing
 
1. A broadcast-type underwater navigation positioning system, comprising 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, an inertial measurement unit I is integrated on the mooring sonar, 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.