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Global underwater PNT system based on Beidou space-time reference

A space-time, global technology, applied in the fields of timing system, navigation, and underwater positioning, can solve the problems affecting the long-term, high-precision operation, volume, weight, power consumption, inertial navigation system error accumulation and other problems of the submersible, and achieve stability. Underwater PNT service, high concealment, small size effect

Active Publication Date: 2021-02-09
SHANGHAI ACOUSTICS LAB CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inertial navigation system with autonomous navigation capability is still the core equipment for underwater navigation, but the error of the inertial navigation system will accumulate over time, which cannot meet the high-precision underwater navigation requirements for long-term voyages in the open sea
However, AUV, UUV and other submersibles have limitations in volume, weight, and power consumption, which makes it impossible to install large-scale high-precision inertial navigation, which affects the long-term and high-precision operation of such submersibles underwater.
In addition, in more complex marine environments, such as waters under the Arctic ice sheet, sensitive waters, etc., underwater submersibles cannot float up to obtain Beidou / GPS or astronomical navigation information to calibrate inertial navigation

Method used

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  • Global underwater PNT system based on Beidou space-time reference
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  • Global underwater PNT system based on Beidou space-time reference

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Embodiment Construction

[0032] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0033] This embodiment provides a global underwater positioning, navigation, and timing system with Beidou as the space-time reference, which can provide positioning, navigation, and timing services for underwater users, and can meet the different needs of various users at the same time. It has continuity, robustness and reliability characteristics. The system especially has the following three innovations: First, it uses a variety of underwater navigation technology systems. Due to the complexity of the ocean environment, the propagation of signals is easily limited by the physical characteristics of the seawater medium and the influence of marine environmental conditions. The single technology system Once the realized PNT service is disturbed, the navigation, positioning and timing of the underwater platform will be in a blind s...

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Abstract

The invention discloses a global underwater PNT system based on the Beidou space-time reference. Underwater PNT systems conforming to sea areas are constructed in a global sea area according to the characteristics of the sea areas, and each underwater PNT system comprises an overwater part and an underwater part, wherein the overwater part is provided with a space-time reference conversion deviceused for obtaining a space-time reference from a Beidou satellite navigation system and transmitting the space-time reference to the underwater part, wherein the underwater part comprises a pluralityof fixed and movable navigation positioning areas and a user side, wherein each navigation positioning area is configured with PNT networks with the same or different technical systems, and the user side is configured with a multi-source underwater navigation technical system for positioning, navigation and time service. The global underwater PNT system based on the Beidou space-time reference meets the requirements of various underwater platforms for underwater PNTs, has the advantages of being small in size, low in power consumption, high in concealment, high in precision, capable of workingfor a long time and the like, and can provide continuous, reliable and stable PNT information for underwater users.

Description

technical field [0001] The invention relates to the field of underwater positioning, navigation and timing systems, in particular to a global underwater positioning, navigation and timing system with the Beidou satellite navigation system as the space-time reference. Background technique [0002] The GPS system is a system that uses GPS positioning satellites to perform positioning, navigation, and timing in real time around the world. GPS can provide global users with low-cost, high-precision three-dimensional position, speed and PNT information such as precise timing. The Beidou satellite navigation system independently developed by my country (hereinafter referred to as the Beidou system) is a global satellite navigation system independently constructed and operated by my country. facility. With the full completion of the deployment of the Beidou-3 global satellite navigation system constellation, the Beidou system already has the capability of PNT services covering the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/45G01S19/47
CPCG01S19/45G01S19/47Y02D30/70
Inventor 郭霖石扬刘松海王姝湘沈广波
Owner SHANGHAI ACOUSTICS LAB CHINESE ACADEMY OF SCI
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