High-precision ground mobile type three-component magnetic survey device and magnetic survey method thereof

Abstract

The invention relates to a high-precision ground mobile type three-component magnetic survey device and a magnetic survey method thereof. The three-component magnetic survey device is composed of a GPS base station, a GPS mobile station, a fluxgate detecting system and a non-magnetic theodolite. The fluxgate detecting system is fixed at the upper part of a telescope of the non-magnetic theodolite;the optical axis of the on-magnetic theodolite is parallel to the X axis of a fluxgate sensor; and the GPS mobile station is connected with an MCU control module in the fluxgate detecting system. According to the invention, a high-precision geodetic coordinate system parameter is obtained by a differential GPS formed by the GPS base station and the GPS mobile station and a geodetic azimuthal angle delta alpha is calculated by combining the non-magnetic theodolite, so that orientation of the three-component magnetic sensor can be completed without the inertial navigation system. Moreover, themeasured data are three-component magnetic survey data in a geographic coordinate, no geographic coordinate transformation and data processing are needed, and the data obtained by measurement are applied to geological inversion interpretation directly, so that the magnetic survey work efficiency is improved effectively, the field measuring time is saved, and the field working cost is lowered substantially. In addition, the high-precision ground mobile type three-component magnetic survey device with low price is easy to implement and the precision is high.

Description

Technical field: [0001] The invention relates to a high-precision geomagnetic three-component measurement device and method, in particular to mobile high-precision measurement of geomagnetic three-component information. Background technique: [0002] The three-component magnetic measurement method is to use the three-component magnetometer to measure the geomagnetic field component information. Compared with the traditional total field measurement, it is helpful to quantitatively explain the magnetic body, obtain more abundant geomagnetic field information, and effectively reduce the multiplicity in the inversion. Solubility, and then achieve the purpose of ascertaining geological structure, searching for mineral resources, solving hydrology, engineering geological problems and environmental monitoring. At present, only three-component fluxgate magnetometers are used in seismic stations in my country to measure the total geomagnetic field, magnetic declination D, magnetic in...

AI Technical Summary

Problems solved by technology

However, this device requires a high-precision inertial navigation system to provide attitude information for attitude correction of three-component magnetic measurement data

The inertial navigation system is extremely expensive, and the highest attitude accuracy provided is only a few thousandths of a degree. The three-component magnetic measurement accuracy after attitude correction is generally lower than 10nT, which is difficult to meet the higher-precision geomagnetic three-component measurement

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