An in-situ detection device for magnetic properties of seabed bottom

Abstract

The present invention proposes an in-situ detection device for the magnetic characteristics of the bottom of the seabed, including an electromagnetic field generation module, a magnetic field acquisition module, a power supply, a system controller, and a data processing module. The entire detection device can withstand deep-sea pressure environments; the electromagnetic field generation module Generate DC pulse magnetic field and AC attenuation magnetic field; multiple sensors of the magnetic field acquisition module are distributed on one side of the planar circular coil, which is close to the bottom of the seabed during detection, and a magnetic field sensor is located in the center of the planar circular coil. The rest of the magnetic sensors are evenly distributed on two concentric circles, the inner and outer concentric circles of the planar circular coil, and also include a dry chamber in the shape of a round rod, a wet chamber in the shape of a wheel disc and two watertight cables. The device uses a DC high-voltage power supply module to charge the capacitor, and then uses the capacitor to discharge the coil connected to it to perform in-situ magnetization and demagnetization treatment on the bottom of the seabed with different intensities, measure the corresponding magnetic field change information, and obtain the magnetic characteristics of the bottom of the seabed .

Description

technical field [0001] The invention belongs to the technical field of seabed intelligent detection, and relates to a detection device for magnetic characteristics of seabed bottom. Background technique [0002] Deep-sea exploration is of great significance to the research and utilization of deep-sea ecology, the mining of deep-sea minerals and the study of deep-sea geological structure. As an important detection technology in the deep sea, the in-situ detection technology of the magnetic properties of the seabed bottom has many applications. The discovery of magnetic strips provides strong evidence for the seafloor spreading theory and plate movement; and the seafloor magnetic anomaly is also an effective indicator for detecting hydrothermal areas and analyzing the characteristics of ore deposits. The most effective means of magnetic anomaly strips; the in-situ detection device for the magnetic properties of the deep seabed bottom can detect the types and compositions of s...

AI Technical Summary

Problems solved by technology

Magnetic field data based on satellites, aircraft, or ships needs to be retrieved to obtain the distribution of the submarine magnetic field, and local magnetic anomalies on the seabed (such as short-wavelength magnetic anomalies) cannot be accurately obtained; magnetic field data based on underwater vehicle measurements are incomplete

The analysis of the magnetic properties of seabed rocks / sediments can only be sampled by deep-sea drilling, and the rock magnetometer is used for analysis in the laboratory, which takes a long time and loses the in-situ properties

Currently there is no facility to measure the magnetic properties of the substrate in situ at the seafloor

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