A magnetic interference detection method and device based on changes in the magnetic environment of equipment

Abstract

The invention discloses a magnetic interference detection method and device based on magnetic environment change of equipment. The method comprises that initial correction is carried out on the equipment to obtain an initial magnetic correcting value of the equipment, a first synthesis magnetic vector of the equipment is detected, and a terrestrial magnetism reference vector of the equipment is obtained according to the first synthesis magnetic vector and the initial magnetic correcting value; under the condition that the position and attitude of the equipment are kept unchanged, the magneticfield environment of the equipment is changed, a second synthesis magnetic vector of the equipment is detected, and the magnetic correction reference quantity of the equipment is obtained according tothe second synthesis magnetic vector and the terrestrial magnetism reference vector; and a real-time terrestrial magnetism vector of the equipment is measured on the basis of the magnetic correctionreference quantity. Via an embodiment of the invention, the magnetic correction reference quantity can be obtained rapidly when the magnetic field environment of the equipment changes, so that magnetic interference in terrestrial magnetism of the equipment can be eliminated, the method and device are especially suitable for equipment which is used in the outer field or needs frequency part replacement, and the user experience and using loyalty are both improved.

Description

technical field [0001] The invention relates to the technical field of surveying and mapping, in particular to a method and device for detecting magnetic interference based on changes in the magnetic environment of equipment. Background technique [0002] Many devices on the market today use magnetic sensors to measure geomagnetism (the earth's magnetic field) to determine the orientation of the device. In geomagnetic measurement, the geomagnetic intensity near the ground is relatively weak, the highest is only 0.8Gs, but the magnetic field brought by some magnetic components built in the equipment, such as speakers, iron frames and battery cases containing iron, cobalt and nickel, is almost equal to the geomagnetism. Ten to hundreds of times, which will cause magnetic interference of the magnetic sensor. Since the geomagnetism will not rotate with the magnetic sensor when the device is rotated, but the magnetic field generated by the magnetic parts of the device will rotat...

AI Technical Summary

Problems solved by technology

In the process of horizontal and vertical rotation to find the magnetic correction amount, a bracket and cumbersome operation are required. For some equipment that needs to be replaced frequently, the operation is cumbersome, especially when working in the field, the lack of auxiliary correction devices will not continue Use, which seriously affects the user experience and affects the viscosity of the device

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