Clock synchronization circuit, clock synchronization method, and ocean bottom seismograph

Abstract

The invention discloses a clock synchronization circuit, a clock synchronization method, and an ocean bottom seismograph. The clock synchronization circuit comprises a main clock circuit, at least oneseismic data acquisition circuit, a microprocessor control circuit, and at least two frequency division circuits, wherein the at least two frequency division circuits comprise a first frequency division circuit and a second frequency division circuit; the main clock circuit is used to generate main clock signals; the first frequency division circuit is connected with the main clock circuit, and is used to carry out frequency division processing on the main clock signals to obtain seismic data acquisition clock signals; the seismic data acquisition circuit is connected with the first frequencydivision circuit and used to acquire the seismic data acquisition clock signals; the second frequency division circuit is connected with the main clock circuit, and is used to carry out frequency division processing on the main clock signals to obtain real-time clock signals; and the microprocessor control circuit is connected with the second frequency division circuit and used to acquire the real-time clock signals. The clock synchronization circuit provided by the embodiment of the invention has the advantages of high time accuracy and low power consumption.

Description

technical field [0001] The embodiments of the present invention relate to the field of surveying instruments, in particular to a clock synchronization circuit, a clock synchronization method and a seabed seismograph. Background technique [0002] An undersea seismograph (OBS) is a recording instrument placed on the seabed that can directly receive artificial or natural seismic signals. Compared with conventional seismic data, the data recorded by an undersea seismograph has many advantages. For example, an undersea seismograph is deployed in On the seabed, its data recording is not easily affected by water noise and jitter, so it has a higher signal-to-noise ratio. In addition, ocean bottom seismographs also provide a wide-azimuth observation system that facilitates imaging of strata beneath complex overburdens such as salt domes and analysis of angle-dependent reflectivity. The data processing of the submarine seismograph mainly involves the arrival time of the seismic wav...

AI Technical Summary

Problems solved by technology

Each module of the existing seabed seismograph uses an independent clock crystal oscillator, which easily leads to time disorder among the various modules of the seabed seismograph, making the time accuracy of the data recorded by the seabed seismograph not high

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