A proton type seabed geomagnetism diurnal variation station and a geomagnetic measurement method

Abstract

The invention relates to a proton type seabed geomagnetism diurnal variation station and a geomagnetic measurement method. The proton type seabed geomagnetism diurnal variation station comprises a main control system on a deck and an underwater geomagnetic measurement system. After the main control system on the deck finishes parameter setting of the geomagnetic measurement system above water, thegeomagnetic measurement system is delivered to a seabed for measurement; after the geomagnetic measurement system finishes measurement work, an acoustic transducer awakens an acoustic response moduleof the geomagnetic measurement system for release; the acoustic response module supplies power to a fuse wire to open a release mechanism to cast away balancing weights, so that a pressure resistantcabin emerges from the water surface by means of buoyancy; when judging arrival at the water surface, a water pressure sensor starts a GPS and sends the position of the geomagnetic measurement systemto the main control system for recovery; when the geomagnetic measurement system is fished to the ship, the main control system on the deck acquires measured geomagnetic data and state information viaa wireless function. The proton type seabed geomagnetism diurnal variation station and the geomagnetic measurement method can guarantee effective recovery of the geomagnetic measurement system whileguaranteeing that geomagnetism diurnal variation data can be obtained.

Description

technical field [0001] The invention belongs to the technical field of marine geophysics investigation, and in particular relates to a proton-type submarine geomagnetic diurnal variation station and a method for geomagnetic measurement. Background technique [0002] The diurnal variation of the geomagnetic field is one of the most important error sources in magnetometry. When performing high-precision magnetic measurement, the diurnal variation of the geomagnetic field cannot be ignored. [0003] The geomagnetic diurnal variation station has a certain effective control range (generally within 300km). In the distant sea survey, if the survey ship is far away from the land 300km, the diurnal variation observation station cannot be established within the effective control range. At present, Sentinel magnetometers produced abroad are generally used, and the mooring method similar to the submersible observation system is adopted. The preparation, deployment and recovery operation...

AI Technical Summary

Problems solved by technology

At present, the Sentinel magnetometer produced abroad is generally used, and the mooring method similar to the submarine buoy observation system is adopted. The preparation, deployment and recovery operations are relatively complicated, and relevant materials such as high-strength Kevlar cables and non-magnetic connecting parts need to be prepared. etc., the cost is high; and the geomagnetic diurnal station stays on the seabed for a long time. Due to the seawater corrosion of the metal at the connection of the rope and the action of the bottom current, the connection parts such as the float, the releaser, the load-bearing block and the rope are all damaged. Non-directional friction may continue to occur, and parts may be worn or broken, causing the float to float away and unable to recover the underwater moored instruments normally, resulting in the loss of equipment at the geomagnetic daily change station, resulting in daily geomagnetic change data and further reducing marine geomagnetic measurements. precision

Images