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Synchronous test system based on tame rubidium clock and method thereof for increasing synchronization precision

A technology of synchronous testing and rubidium clocks, which is applied to clocks driven by synchronous motors, synchronization, and instruments using atomic clocks. It can solve the problems of immediate failure of the synchronization function and synchronization accuracy that cannot meet the positioning requirements, and achieve high synchronization accuracy. Effect

Inactive Publication Date: 2015-05-06
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

The synchronization between the existing AIS shore stations is as follows: on the one hand, the synchronization accuracy cannot meet the positioning requirements; fail

Method used

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  • Synchronous test system based on tame rubidium clock and method thereof for increasing synchronization precision
  • Synchronous test system based on tame rubidium clock and method thereof for increasing synchronization precision
  • Synchronous test system based on tame rubidium clock and method thereof for increasing synchronization precision

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Embodiment Construction

[0025] The present invention will be further explained below in conjunction with the drawings:

[0026] Such as figure 1 Shown: The synchronization test system based on the tamed rubidium clock includes the master base station synchronizer 1 and the slave base station synchronizer 2. The master base station synchronizer 1 and the slave base station synchronizer 2 respectively give the 10MHz clock signal and the tamed rubidium clock After the stable PPS second pulse signal, connect these two signals with the AIS shore station (3).

[0027] Such as figure 2 and image 3 Shown: The main base station synchronizer 1 and the slave base station synchronizer 2 are basically the same in structure, mainly composed of rubidium clock 4, GNSS receiver 5 and FPGA chip 6. The slave base station synchronizer 2 needs to be connected to the master base station synchronizer 1 to give The FPGA chip 6 is mainly composed of a frequency dividing module 7, an up-conversion module 8, a counting compariso...

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Abstract

The invention discloses a synchronous test system based on a tame rubidium clock and a method thereof for increasing synchronization precision, which belong to the technical field of land-based positioning and wireless communication. The synchronous test system comprises a main base station synchronizer and a secondary base station synchronizer, wherein a 10 MHz clock signal of the tame rubidium clock and a stable PPS (pulses per second) signal which are subjected to taming are given respectively by the main base station synchronizer and the secondary base station synchronizer, and the two signals are connected with an AIS (Automatic Identification System) shore station. The existing AIS shore station is simply upgraded by utilizing the synchronous test system, so that the AIS shore station has high synchronization precision, and higher synchronization precision can be kept for a long time in the condition that a GNSS (Global Navigation Satellite System) signal disappears, and a foundation is laid for independent positioning of an AIS.

Description

Technical field [0001] The invention relates to a synchronization test system based on a tamed rubidium clock and a method for improving synchronization accuracy, and belongs to the technical field of land-based positioning and wireless communication. Background technique [0002] The simultaneous installation of space-based and land-based dual backup positioning and navigation systems on ships is a necessary measure to ensure the safety of ships’ navigation, and it is also a policy that will be enforced by the International Maritime Organization in the future. However, the current terminal products of roadbed positioning and navigation systems are expensive, and the ship installation rate is very low, while the installation rate of automatic identification system (AIS) terminal equipment is very high, and the main coastal areas of the world have basically covered AIS shore stations. system. Therefore, the existing AIS system can be modified to make it capable of autonomous pos...

Claims

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Application Information

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IPC IPC(8): G04F5/14G04G7/00G04R20/02
Inventor 孙晓文张淑芳胡青
Owner DALIAN MARITIME UNIVERSITY
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