Submarine sound signal synchronization moment calculation system based on buoy platforms as well as method

Abstract

A submarine sound signal synchronization moment calculation system based on buoy platforms as well as a method are used for calculating a moment that the same submarine sound signal is received on different buoy platforms on the basis of a unified time reference. An accurate pulse per second provided by a GPS receiver is taken as a time reference, GPS universal time information is provided and used for synchronization moment calculation; and a digital signal processor is used for receiving the pulse per second and the GPS time information, and submarine sound signal synchronization moment calculation is performed. Data processing takes one second timed by a DSP timer as a processing cycle, a submarine sound data sampling point sequence number corresponding to the pulse per second signal and received in the second is taken as an accurate time alignment sign, and according to a relative relationship between the pulse per second and the GPS time information, a calculation formula for a synchronization moment of a submarine sound effective signal point is determined. The synchronization moment calculation method provided by the invention does not need to synchronize a local time to a GPS time and can be applied to the field of time unification of offshore multi-buoy submarine sound positioning systems requiring quick response.

Description

technical field [0001] The invention relates to a signal synchronization time calculation system and method, in particular to a buoy platform-based underwater acoustic signal synchronization time calculation system and method. Background technique [0002] Sonobuoy is a buoy-type sonar detector for detecting underwater targets. It forms a buoy-sonar system with underwater acoustic signal receiving and processing equipment, which is used for submarine detection, target positioning, and seabed monitoring. Most of the sonar buoys are powered by batteries. Due to the small size of the buoy and the need to consider the counterweight, the capacity of the battery that can be carried is very limited, and the sonar buoys are often arranged in the open sea, and it is inconvenient to replace the battery. The requirements for power consumption are more stringent. Although many marine buoys are now equipped with additional solar power storage devices, low power consumption is still a ke...

AI Technical Summary

Problems solved by technology

One is to rely on the system itself to be equipped with a high-precision clock source, such as an atomic clock. Due to the high cost and high power consumption of the high-precision clock source, it is not suitable for buoy platforms operating on the far shore

The second is to synchronize the time of the local system to the timing base station, such as GPS satellites. This solution requires the system to perform frequent synchronization calculations, wasting system resources

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