Underwater high-precision magnetic field measurement system

Abstract

The invention discloses an underwater high-precision magnetic field measurement system. The system comprises multiple underwater magnetic field measurement units and a shore main unit. Each underwatermagnetic field measurement unit comprises a magnetic sensor for measuring the real-time magnetic field of a position where the underwater magnetic field measurement unit is located, a gesture sensorfor measuring the real-time gesture change of the underwater magnetic field measurement unit, a temperature sensor for measuring the real-time temperature in the underwater magnetic field measurementunit, a depth sensor for measuring the real-time depth of the position where the underwater magnetic field measurement unit is located, a data collection module for receiving information of all the sensors, a sealing cavity and a balance weight baseplate; the shore main unit is provided with a magnetic field solution module which is used for solving data transmitted by the data collection module and then outputting magnetic field data. According to the system, the efficiency and accuracy for engineering measurement on magnetic field characteristics of targets such as underwater sea areas or ships and underwater vehicles are high, and the system is easy and convenient to use.

Description

technical field [0001] The invention relates to the field of underwater magnetic field measurement, in particular to an underwater high-precision magnetic field measurement system. Background technique [0002] At present, there are many problems in the magnetic field measurement for underwater sea areas or ships and underwater vehicles. The existing measurement schemes mostly adopt two forms. One is to build a large-scale test station, and each magnetic sensor is fixedly installed to cover the entire measured area. This scheme has high measurement accuracy, but it is difficult to construct and costs a lot of money; The magnetic sensor array is temporarily arranged underwater. However, the magnetic sensor is easily disturbed by waves in the water, and its attitude changes in real time, making it difficult to measure the magnetic field accurately. When considering the integrated attitude sensor, the error of the magnetic field measurement solution will be further enlarged du...

AI Technical Summary

Problems solved by technology

The existing measurement schemes mostly adopt two forms. One is to build a large-scale test station, and each magnetic sensor is fixedly installed to cover the entire measured area. This scheme has high measurement accuracy, but it is difficult to construct and costs a lot of money; The magnetic sensor array is temporarily arranged underwater. However, the magnetic sensor is easily disturbed by waves in the water, and its attitude changes in real time, making it difficult to measure the magnetic field accurately.

When considering the integrated attitude sensor, the error of the magnetic field measurement solution will be further enlarged due to factors such as non-orthogonal axes of the magnetic sensor itself, inconsistent sensitivities of each axis, zero offset of each axis, and integrated installation errors of the magnetic sensor and the attitude sensor.

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