Atomic clock-based sinking and floating type ocean bottom seismograph and atomic clock taming method

Abstract

The invention discloses an atomic clock-based sinking and floating type ocean bottom seismograph and an atomic clock taming method and belongs to the technical field of ocean bottom seismographs. The atomic clock-based sinking and floating type ocean bottom seismograph comprises a pressure-resistant cabin, a seismic sensor and an atomic clock circuit board, and the atomic clock circuit board is used for providing an effective and credible clock source for the seismograph in a seabed working period to achieve clock correction of data of the seismograph. The method comprises the following steps that: 1, an MCU receives a high-frequency oscillation signal provided by an atomic clock as a clock source for starting; 2, the MCU controls a control selection unit; 3, the MCU performs a screening algorithm on an externally provided PPS to judge the type of an external clock source; 4, the MCU controls the control selection unit; 5, the MCU sets taming parameters to the atomic clock and sends an atomic clock taming starting instruction; 6, in the taming process, the MCU obtains the taming state of the atomic clock; and 7, the MCU sends a taming ending instruction, and atomic clock taming is completed. With the ocean bottom seismograph and the method adopted, the problem of data acquisition clock error of the ocean bottom seismograph can be solved.

Description

Technical field [0001] The present invention relates to the technical field of seabed seismic gauges, and more particularly to an atomic clock-based submarine seismometer and atomic clock tame method. Background technique [0002] The seabain seismograph is an important instrument for the physics detection of the underwater gentle, and the Soil seabain seismograph is the main means of the marine earthquake exploration, which rely on its own dehinable release mechanism to realize the cloth and recycling of the instrument, due to its Leaving the sea time, and it does not have a valid clock source during the seabed work to realize the clock correction of its own data. Its own instrument clock precision is very important. Now the underlying seismograph has an internal crystal excitation. Constant temperature crystal or warm complement crystal, its accuracy is within 0.5 ppm, so it is a relatively large amount of magnitude during long-term retaining seas. Inventive content [0003] I...

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Problems solved by technology

[0002] The submarine seismograph is an important instrument for seabed geophysical exploration. In the distant sea exploration, the sinking and floating submarine seismograph is the main means of marine seismic exploration. It relies on its own decoupling release mechanism to realize the deployment and recovery of the instrument. Due to its Staying in the sea for a long time, and there is no effective and credible clock source to realize the clock correction of its own data during the seabed work, the accuracy of its own instrument clock is very important, and the internal crystal oscillator of the current submarine seismograph uses Constant-temperature crystal oscillator or temperature-compensated crystal oscillator has an accuracy of less than 0.5PPM, so during the long-term stay in the sea, the clock error of its own data collection will accumulate to a relatively large magnitude

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