High precision automatic absolute terrestrial magnetism observation method

Abstract

The invention provides a high precision automatic absolute terrestrial magnetism observation method comprising the following steps: an absolute terrestrial magnetism measurement mechanism is arranged at a measuring point; the absolute terrestrial magnetism measurement mechanism comprises a support mechanism (1), a two dimensional nonmagnetic rotary mechanism (2) and a measuring unit (3); a marker position sensor (4) is arranged at a chosen position, the marker position sensor can be used for enabling a PSD sensor to measure azimuths of two paths of incident laser lights that are different in height, the marker position sensor is initially aligned, terrestrial magnetism declination D is measured, and terrestrial magnetism inclination I is measured. The high precision automatic absolute terrestrial magnetism observation method is advantageous in that a laser device is used for replacing a conventional marker, the laser lights are aligned with the marker, accuracy of marker alignment can be ensured, and therefore accuracy of measurement of the measured terrestrial magnetism declination D and the measured terrestrial magnetism inclination I can be ensured.

Description

technical field [0001] The invention belongs to the technical field of geomagnetic observation, and in particular relates to a high-precision automatic absolute geomagnetic observation method. Background technique [0002] A fluxgate theodolite is an instrument used to measure absolute geomagnetic parameters, generally including a fluxgate sensor and an ordinary theodolite; an ordinary theodolite is equipped with a telescope. The fluxgate sensor is fixed on the telescope, and the magnetic axis of the fluxgate sensor is basically parallel to the optical axis of the telescope. The fluxgate theodolite can measure the geomagnetic declination D and geomagnetic inclination I. Taking the measurement of the geomagnetic declination D as an example, the measurement principle is as follows: firstly, manually rotate the telescope, and rely on naked eye observation to align the telescope with the marker. At this time, the marker azimuth α is obtained through the theodolite scale; Turn ...

AI Technical Summary

Problems solved by technology

[0004] (1) Using the naked eye observation method to align the telescope with the landmark, there will inevitably be large observation errors, thereby reducing the measurement accuracy of the geomagnetic declination D and geomagnetic inclination I obtained in the final measurement;

[0005] (2) Turn the fluxgate sensor manually, and rely on naked eye observation to determine the position where the magnetic field is 0. There is still a large observation error, which reduces the measurement accuracy

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